CN107214157A - A kind of oil storage tank cleaning systems and method - Google Patents

Abstract

The invention provides an oil storage tank cleaning system, comprising: a guide rail frame (2), a side wall cleaning device (3) and a bottom surface cleaning device (4), wherein the guide rail frame (2) is installed on the side of the oil storage tank At the top opening; the side wall cleaning device (3) is installed on the rail frame (2), and the side wall cleaning device (3) is movable relative to the rail frame (2); the bottom surface cleaning device (4) including a control unit (41) and a cleaning unit (42), the control unit is located in the central area of the bottom surface of the oil storage tank, and the cleaning unit (42) is connected to the control unit (41) for cleaning the storage tank The bottom surface of the oil tank, the oil storage tank side wall cleaning system of the present invention can regularly clean the oil storage tank without human intervention. The present invention also provides a method for cleaning an oil storage tank, using the above-mentioned oil storage tank cleaning system.

Description

System and method for cleaning an oil storage tank

technical field

The present invention relates to the technical field of oil storage tank cleaning, in particular to an oil storage tank cleaning system and method.

Background technique

In the process of crude oil extraction, tiny particles in the oil reservoir, a small amount of mechanical impurities, sand, soil, heavy metal salts, and heavy oily substances such as paraffin and asphalt will naturally sink due to their high specific gravity. When crude oil is stored in the oil storage tank When it accumulates at the bottom of the oil tank, it forms a black and thick gelatinous substance layer, which is the bottom sludge of the oil tank. The sludge at the bottom increases with the continuous storage and transportation time, which seriously affects the storage and transportation production of the oil tank. It must be regularly to clear.

In addition, when the oil product is upgraded or replaced with different oil products, the remaining oil in the tank and the newly loaded oil cannot be mixed, and the oil storage tank has leakage and other damages. When regular inspections and repairs are required, it is necessary to repair the oil storage tank. tank for cleaning. At the same time, according to national regulations, oil storage tanks must also be cleaned and overhauled regularly.

Usually, a QPN strong mud discharger is installed inside the oil storage tank to assist the mud discharge, and the bottom mud of the tank is sucked out through negative pressure, but the removal is not complete.

In addition, many refineries are still in the actual production stage of manual mud cleaning tanks, requiring personnel to work in the tanks. According to the "Repair Regulations for Vertical Cylindrical Steel Welded Crude Oil Tanks", the repair period of oil tanks is 5 days. —7 years, it takes at least 45 days to manually clean one oil tank. The world's advanced COW oil tank cleaning method also requires 7 people to work continuously for 15 days. Because there are a lot of flammable and other harmful gases in the tank, the working environment is harsh and dangerous. It is very high, labor-intensive, and the tank cleaning period is long, causing great environmental pollution.

At present, the cleaning methods of oil tanks in the world include mechanical cleaning, chemical cleaning, hydraulic cleaning, steam cleaning, etc. Most of the cleaning methods need to clean the oil tank after it is emptied.

However, at present, my country's oil production and strategic reserve tasks are heavy, and the capacity of crude oil tanks is very tight, so it is difficult to free up oil tanks for such a long period of cleaning. With the increase of oil storage, a large number of oil storage tanks are used, and more than 20 million cubic meters of crude oil storage tanks need to be cleaned every year. With the increase of reserves, this value is still rising. In my country's current situation, because advanced cleaning equipment is expensive, it is impossible to equip it in equal proportions. At the same time, the manual cleaning cycle is long, the risk is high, and the efficiency is low. Combined with the actual situation, many scholars have proposed the idea of shortening the cleaning cycle to adapt to China's national conditions. 3 -Cleaning once every 6 months or so, due to the short cleaning cycle, less oil tank bottom sludge and fast cleaning speed. But this idea still cannot solve the reality that cleaning equipment is far from enough.

Contents of the invention

The object of the present invention is to provide a system and method for cleaning an oil storage tank, which can clean the oil storage tank regularly in a safe, reliable, reasonable and effective manner, so as to overcome the above-mentioned problems in the prior art.

To achieve the above object, the present invention adopts the following technical solutions:

An oil storage tank cleaning system, comprising: a guide rail frame, a side wall cleaning device and a bottom surface cleaning device, wherein,

The guide rail frame is installed to the top opening of the oil storage tank;

The side wall cleaning device is installed on the rail frame and is movable relative to the rail frame. The side wall cleaning device includes a chassis and a side wall cleaning main body. The chassis includes a first traveling device and a bottom plate. The base plate is fixed to the first traveling device, the first traveling device is movable on the bottom surface of the oil storage tank, the side wall cleaning main body includes a frame, a roller, a driver and a scraper, the frame is fixed on the base plate, and the The two ends of the roller are installed on the frame, the driver is connected with one end of the roller to drive the roller to rotate relative to the frame, the scraper is fixed on the roller, facing the side of the oil storage tank wall arrangement;

The bottom surface cleaning device includes a control unit and a cleaning unit. The control unit is located in the central area of the bottom surface of the oil storage tank and includes a first motor, a reducer, a blade wheel, a rotating frame and a second motor. The first motor is connected to reducer, and drive the blade wheel to rotate through the reducer, the second motor is connected to the reducer, and drive the rotating frame to rotate through the reducer, the cleaning unit includes a frame, a second walking device, a conveyor belt and a plurality of scrapers, the frame is connected to the rotating frame through a telescopic device, the scraper is fixed on the conveyor belt, and moves with the conveyor belt.

Preferably, the side wall cleaning device further includes a spot facing shovel, and the spot facing shovel is fixed on the side of the frame.

Preferably, the roller is segmented and consists of multiple sub-rollers, each sub-roller has a corresponding driver to drive it to rotate, and a spatula is fixed on each sub-roller.

More preferably, the side wall cleaning main body further includes a sheath, the sheath is located between two adjacent sub-rollers, and is used to protect the driver between the sub-rollers, and the sheath is fixed with Spatula.

Preferably, the side wall cleaning body further includes a limiting plate, which is fixed on the frame and located between the outer wall of the sub-roller and the inner wall of the oil storage tank.

Preferably, the driver is a hollow motor, and the hollow motor is connected with an intake pipe for feeding high-pressure gas into the hollow motor, and the roller is provided with air holes for discharging high-pressure gas.

According to a preferred embodiment, the cleaning unit also includes a mud-pushing device, the mud-pushing device includes a driving rod and springs on both sides of the driving rod, the driving rod is located in front of the conveyor belt, and one end of the spring is fixed on the On the driving rod, the other end is fixed on the frame, so that the driving rod can move forward and backward relative to the conveyor belt.

Further, the cleaning unit further includes a slewing support arranged on the top of the frame and connected to the link device.

Preferably, the bottom of the oil storage tank is provided with mud discharge holes, and the mud discharge holes are evenly arranged at the bottom of the oil storage tank at equal intervals for sludge discharge.

According to another aspect of the present invention, the present invention also provides a method for cleaning an oil storage tank, using the cleaning system described in the present invention, comprising the following steps:

S1. Inject nitrogen into the oil storage tank;

S2. Make the first traveling device start to move, the side wall cleaning device moves along the track defined by the rail frame, and at the same time, the driver drives the roller to rotate, so that the scraper scrapes off the oil sludge on the inner wall of the oil storage tank ;

S3. Start the first motor, the blade wheel starts to rotate, discharge the sludge in the central area, the first motor stops working, start the second motor, the rotating frame starts to rotate, rotate the cleaning unit to the cleaning position, and the telescopic device extends, The cleaning unit is moved from the central area to the direction close to the inner wall of the oil tank, and the conveyor belt is driven during the movement of the cleaning unit, so that the scraper can clean the oil sludge on the bottom surface of the oil storage tank, and then the telescopic device shrinks to make the cleaning unit move from the oil tank to the oil tank. The direction of the inner wall of the tank moves to the direction close to the central area, and the second motor is started again to rotate the cleaning unit to the next cleaning position, and so forth.

The oil storage tank cleaning system and method of the present invention have the following beneficial effects:

1. The oil storage tank cleaning system of the present invention is simple in structure and low in cost, and can be mass-produced and applied to oil storage tanks, so that the oil storage tank itself has side wall and bottom surface cleaning functions in addition to normal oil storage functions. The device can regularly clean the inner wall and bottom surface of the oil storage tank during the use of the oil storage tank. The cleaning process does not require manual intervention and is safe to operate;

2. The roller of the side wall cleaning device is segmented, and each part is driven by a driver, which can effectively prevent the problem of unstable operation of the shaft length and insufficient power, and the motor is covered by a sheath, and the sheath is fixed with a With a scraper, don't worry about the problem that the part where the motor is installed can't clean the side wall;

3. There is a limit plate between the side wall cleaning device and the side wall, which can prevent the scraper from scratching the side wall of the oil storage tank;

4. The center of the bottom surface of the oil storage tank adopts the "sludge discharge vane wheel" to discharge the sludge in the central area to outside the outer circle of the vane wheel, which can solve the problem that the center of the oil storage tank cannot be cleaned;

5. The cleaning unit of the bottom surface cleaning device is connected with the telescopic device through the slewing bearing, and the cleaning unit can change the angle during operation, which is convenient for cleaning;

6. Both the side cleaning device and the bottom cleaning device use crawler belts to ensure that the cleaning device can run smoothly even when there is sludge;

7. The oil storage tank cleaning method proposed by the present invention can clean the oil storage tank reasonably and effectively, improving the cleaning efficiency. This self-contained cleaning function can increase the usual storage capacity of the oil storage tank, and at the same time can greatly reduce the 5-year One cleaning time, during the five-year cycle cleaning, because the amount of sediment inside the tank is not much, it brings convenience for inspection and maintenance.

Description of drawings

The invention will now be described in more detail with reference to the accompanying drawings, in which:

Fig. 1 is a three-dimensional structural schematic diagram of an oil storage tank cleaning system according to the present invention;

Fig. 2 is a schematic diagram of the three-dimensional structure of the side wall cleaning device in Fig. 1;

Fig. 3 is a front view of the side wall cleaning device in Fig. 2;

Fig. 4 is a side view of the side wall cleaning device in Fig. 2;

Fig. 5 is a sectional view of a side wall cleaning device;

6 is a schematic perspective view of a sub-roller with a scraper of the side wall cleaning device of the present invention;

Fig. 7 is a schematic structural view of a protective cover with a spatula;

Fig. 8 is a schematic structural view of the bottom surface cleaning device of the present invention;

Fig. 9 is a schematic structural view of the cleaning unit part of the bottom surface cleaning device in Fig. 8;

Fig. 10 is a sectional view of the control unit part of the bottom surface cleaning device in Fig. 8;

Figure 11 shows the lever device of the cleaning unit;

Fig. 12 is a structural schematic diagram of the conveyor belt and the scraper of the cleaning unit in the bottom surface cleaning device of the present invention;

Fig. 13 is a schematic diagram of the movement trajectory of the cleaning unit of the bottom surface cleaning device of the present invention,

In the figure: 1—tank; 2—rail frame; 3—side wall cleaning device; 31—chassis; 311—first traveling device; 312—bottom plate; 32—side wall cleaning main body; 321—frame; 322—roller ;3221—sub-roller; 323—driver; 324—scraper; 325—rib plate; 326—sheath; 327—limit plate; 328—air intake pipe; Device; 41—control unit; 411—first motor; 412—second motor; 413—reducer; 4131—outer ring; 4132—intermediate shaft; 414—blade wheel; 415—rotary frame; 42—cleaning unit; 421 —frame; 422—second traveling device; 423—conveyor belt; 4231—drive shaft; 424—scraper; 425—slewing support; 426—ear plate; 43—telescopic device; ; 442—spring; 5—discharging mud hole.

detailed description

Specific embodiments of the present invention will be illustrated below with reference to the accompanying drawings.

As shown in FIG. 1 , the oil storage tank cleaning system of the present invention is arranged in the tank body 1 of the oil storage tank, and includes: a rail frame 2 , a side wall cleaning device 3 and a bottom surface cleaning device 4 .

Wherein, the rail frame 2 is mounted on the top opening of the oil storage tank, the side wall cleaning device 3 is mounted on the rail frame 2 , and the side wall cleaning device 3 is movable relative to the rail frame 2 .

2 to 7, the side wall cleaning device 3 includes a chassis 31 and a side wall cleaning main body 32, the chassis 31 includes a first walking device 311 and a bottom plate 312, and the bottom plate 312 is fixed on the first walking device 311, with To support the sidewall cleaning body 32, the first traveling device 311 can be a crawler-type traveling device or a wheel-type traveling device. Driven by a motor, the first traveling device 311 can move on the bottom surface of the oil storage tank. In this embodiment, a crawler-type traveling device is adopted, as commonly used in traveling machines.

The side wall cleaning main body 32 includes a frame 321, a roller 322, a driver 323 and a scraper 324, the frame 321 is fixed on the base plate 312, and the height of the frame 321 can be designed according to the height of the oil storage tank, so that the frame 321 can basically cover the required Clean tank side wall area. Both ends of the roller 322 are installed on the frame 321, the driver 323 is connected to one end of the roller 322, and drives the roller 322 to rotate relative to the frame 321, and the scraper 324 is fixed on the roller 322 on, for example via bolts, facing the side wall of the oil storage tank. In this embodiment, the roller 322 is segmented and consists of a plurality of sub-rollers 3221, each sub-roller 3221 has a corresponding driver 323, each sub-roller 3221 is fixed with a spatula, The driver 323 drives the sub-roller 3221 to rotate relative to the frame 321, and the sub-roller 3221 drives the scraper 324 to scrape off the sludge on the side wall of the oil storage tank. Advantageously, the advantage of the segmented roller is that it can reduce the torque on the roller and reduce the risk of damage. In addition, when the scraper is severely worn and needs to be replaced, it is not necessary to replace the entire roller together, only the sub-roller needs to be replaced , reducing maintenance costs.

In addition, ribs 325 are also provided on the frame 321 to enhance the strength of the frame.

The side wall cleaning device 3 is installed to the rail frame 2 on the top of the oil storage tank, and the side wall cleaning device 3 is movable relative to the rail frame 2, so that the side wall cleaning device 3 can be driven by the first traveling device 311 along the The inner walls of the storage tank move.

In addition, the side wall cleaning device also includes a spot facing shovel 33, which is fixed on the side of the frame 321. In use, the spot facing shovel 33 can spot the oil sludge on the bottom surface to facilitate the walking of the side wall cleaning device. When the cleaned sludge falls on the bottom surface close to the side wall, the countersink 33 can push the dropped sludge, so that a part of the sludge is directly extracted from the mud discharge holes 5 around the bottom of the oil storage tank, and another part of the sludge is removed from the bottom surface of the oil storage tank. Under the combined action of the side wall cleaning device 3 and the bottom surface cleaning device 4, the mud finally flows out from the mud discharge holes around the oil tank. In addition, the countersinking shovel can also play a role in collecting sludge.

Referring to FIG. 6 , the scraper 324 is fixed to the sub-roller 3221 by bolts, is in the form of an arc plate, and has a blade angle at the top, so as to better scrape off the oil sludge on the side wall of the oil storage tank.

5 and 7, the side wall cleaning main body 32 also includes a sheath 326, the sheath 326 is located between two adjacent sub-rollers 3221, used to protect the driver 323 between the sub-rollers, and on the sheath A spatula 324 is fixed.

Referring to FIG. 5 again, the side wall cleaning main body 32 also includes a limiting plate 327, which is fixed on the frame 321 and located between the outer wall of the sub-roller and the inner wall of the oil storage tank. Advantageously, the limiting plate 327 can Fixed spatula does not shake. In addition, when the oil sludge on the side wall of the oil storage tank is removed, the limit plate touches the inner wall of the oil storage tank, thereby preventing the scraper from scraping the side wall of the oil storage tank and avoiding damage to the side wall of the oil storage tank .

In addition, the driver 323 can be a hollow motor, and an air intake pipe 328 is connected to the hollow motor, which is used to feed high-pressure gas into the hollow motor, so that the high-pressure gas enters the roller 322 or the sub-roller 3221, correspondingly , on the roller 322 or the sub-roller 3221, an air hole 329 for high-pressure gas discharge is provided, so that the high-pressure gas blown from the roller 322 or the sub-roller 3221 can be blown onto the spatula 324, and the gas on the spatula 324 Sludge blows off. Preferably, the air hole 329 is arranged on the side close to the scraping surface of the sludge scraper 324, so that the high-pressure gas can directly act on the sludge scraping surface, and the mud blowing effect is better.

The bottom surface cleaning device of the present invention will be described with reference to FIGS. 8 to 12 .

Referring to FIG. 8 , the oil storage tank bottom cleaning device 4 of the present invention includes a control unit 41 and a cleaning unit 42 . Wherein, the control unit 41 includes a first motor 411, a second motor 412, a reducer 413, a blade wheel 414, and a rotating frame 415. The first motor 411 is connected to the reducer 413, and drives the blade wheel 414 to rotate through the reducer. The second motor 412 is connected to the reducer 413 , the rotating frame 415 is connected to the reducer 413 , and the second motor 412 can drive the rotating frame 415 to rotate through the reducer 413 . The cleaning unit 42 is connected to the rotating frame 415 through the telescopic device 43, and follows the rotation of the rotating frame.

Referring to FIG. 9 , the cleaning unit 42 includes a frame 421 , a second traveling device 422 , a conveyor belt 423 and a plurality of scrapers 424 , and the frame 421 is connected to the rotating frame 415 through a telescopic device 43 . In addition, the cleaning unit 42 can also include a slewing support 425, the slewing support 425 is arranged on the top of the frame, the ear plate 426 is connected with the telescopic device 43, the frame 421 of the cleaning unit 42 can rotate under the action of the slewing support 425, and the Clean the bottom surface near the inner wall of the oil storage tank for a week. Furthermore, a sealing ring is provided in the slewing support 425 to prevent oil sludge from entering.

The telescopic device 43 has an extended state and a contracted state. When the cleaning unit 42 is working, the oil tank moves from the position close to the center, that is, the contracted state of the telescopic device, to the inner wall of the oil tank, that is, the extended state of the telescopic device, and then returns to the inner wall of the oil tank. When it is close to the central position, the cleaning unit cleans another position again, so it moves repeatedly.

The second traveling device 422 includes a motor and a reducer. The transmission belt 423 is sleeved on the transmission shaft 4231, and the transmission shaft 4231 rotates under the drive of the driving mechanism. The scraper 424 is fixed on the transmission belt 423 and follows the transmission belt 423 sports. The second traveling device 422 is driven by the motor and the traveling speed reducer, so that the cleaning unit 42 can move on the bottom surface of the oil storage tank. Anti-corrosion, the power source adopts synchronous motor. The conveyor belt 423 is driven by the transmission shaft 4231, and the scraper 424 can be fixed on the conveyor belt 423 by bolts, and moves with the conveyor belt 423 to scrape off the oil sludge on the bottom surface of the oil storage tank.

Referring to Fig. 10, the reducer 413 can use the outer ring 4131 as a frame and the intermediate shaft 4132 to rotate to drive the blade wheel 414 to rotate, or the intermediate shaft 4132 can be used as a frame to rotate the outer ring 4131 to drive the rotating frame 415 to rotate . The vane wheel 414 discharges the oil sludge near the center of the bottom surface of the oil storage tank to outside the outer circle of the vane wheel, which is the position where the cleaning unit can clean.

Referring to Fig. 11, the cleaning unit 42 also includes a mud-pushing device 44, and the mud-pushing device 44 includes a driving rod 441 and a spring 442 positioned at both sides of the driving rod, the driving rod 441 is positioned in front of the conveyor belt 423, and one end of the spring 442 is fixed on The other end of the driving rod 441 is fixed on the frame 421 , so that the driving rod 441 can move forward and backward relative to the conveyor belt 423 . Under the action of the spring 442, the lever 441 is always at the end close to the scraper 424. When the scraper 424 scrapes off the sludge on the bottom surface and sticks to the scraper, when the scraper 424 touches the lever 441, the scraper 424 pushes the lever. The rod 441 moves away from the scraper 424. When the scraper 424 turns upwards with the conveyor belt 423 and leaves the driving rod 441, the sludge on the scraper 424 will fall off, and the driving rod 441 resets under the action of the spring force. , continue to pull the mud for the upcoming scraper.

Referring to FIG. 12 , the scrapers 424 are fixed on the conveyor belt in a staggered manner, and the scrapers and a group of adjacent scrapers are installed in a staggered manner, which can make the cleaning more thorough.

Referring again to FIG. 1 , the bottom of the oil storage tank is provided with mud discharge holes 5 , and the mud discharge holes are evenly arranged at the bottom of the oil storage tank at equal intervals for sludge discharge. Preferably, the position of the mud discharge hole 5 can be set according to the movement trajectory of the cleaning unit 42 .

Referring to FIG. 12 , the cleaning trajectory of the bottom surface cleaning device 4 will be described. When the bottom surface of the oil storage tank needs to be cleaned, the first motor 411 is started, and the intermediate shaft 4132 of the reducer 413 rotates, driving the blade wheel 414 to rotate, and the oil sludge near the center of the bottom surface of the oil storage tank is discharged outside the outer circle of the blade wheel. It is the position where the cleaning unit 42 can be cleaned. The first motor 411 stops working, the second motor 412 starts, the outer ring 4131 of the reducer 413 rotates, and the rotating frame 415 is driven to rotate, thereby driving the frame 421 of the cleaning unit 42 to rotate. The cleaning unit 42 rotates to the cleaning position, the second traveling device 422 starts to work, the telescopic device 43 is in an extended state, and the cleaning unit 42 moves from the central area of the bottom surface of the oil storage tank to the direction of the side wall of the oil storage tank (direction A shown in Figure 12 ), at the same time, the transmission belt 423 drives the scraper 424 to move to clean the bottom surface of the oil storage tank, and discharge the sludge from the mud discharge hole 5 at the bottom of the oil storage tank. The central area approaches (direction B shown in FIG. 12 ), and then the second motor 412 starts again to rotate the cleaning unit 42 to the next cleaning position, and so on, until the bottom surface of the oil storage tank is cleaned.

Generally speaking, the working principle of the oil storage tank cleaning system of the present invention is: when the oil storage tank needs to be cleaned, the side wall cleaning device 3 installed on the guide rail frame 2 starts to clean the oil storage tank side wall, and at the same time , the control unit 41 of the bottom surface cleaning device 4 controls the movement track of the cleaning unit 42 to clean the bottom surface of the oil storage tank, and can also cooperate with the side wall cleaning device 3 to discharge the oil sludge removed from the side wall of the oil storage tank to open the oil storage tank. The sludge discharge hole 5 is used to discharge the sludge from the sludge discharge hole 5, or the sludge is sucked out by the suction device connected to the sludge discharge hole 5.

According to another aspect of the present invention, the present invention also provides a method for cleaning an oil storage tank, using the oil storage tank cleaning system described in the present invention, comprising the following steps:

First, inject nitrogen gas into the oil storage tank to prevent explosion;

When cleaning the bottom surface of the oil storage tank, start the first motor 411, the intermediate shaft 4132 of the reducer 413 rotates, drives the blade wheel 414 to rotate, and discharges the oil sludge near the center of the bottom surface of the oil storage tank to outside the outer circle of the blade wheel, that is, cleaning The position where the unit can be cleaned, the first motor 411 stops working, the second motor 412 starts, the outer ring 4131 of the reducer 413 rotates, and the rotating frame 415 is driven to rotate, thereby driving the frame 421 of the cleaning unit 42 to rotate, and the cleaning unit 42 Rotate to the cleaning position, the second traveling device 422 starts to work, the telescopic device 43 is in an extended state, and the cleaning unit 42 moves from the central area of the bottom surface of the oil storage tank to the direction of the side wall of the oil storage tank (direction A shown in Figure 12), and at the same time The transmission belt 423 drives the scraper 424 to move, cleans the bottom surface of the oil storage tank, and discharges the sludge from the mud discharge hole 5 at the bottom of the oil storage tank. (direction B shown in FIG. 12 ), and then the second motor 412 is started again to rotate the cleaning unit 42 to the next cleaning position, and so forth;

When cleaning the side wall, the first traveling device 311 starts to move on the bottom surface of the oil storage tank, and since the side wall cleaning device 3 is installed on the rail frame 2 at the top of the tank body, the side wall cleaning device 3 is limited along the rail frame The path moves, that is, along the side wall of the oil storage tank. At the same time, the driver 323 drives the roller 322 to start rotating, and the fixed scraper 324 on the roller 322 rotates accordingly, and starts to scrape the oil sludge on the side wall of the oil storage tank. For scraping, the side wall cleaning device 3 moves along the side wall of the oil storage tank while cleaning the oil sludge on the side wall. Part of the cleaned oil sludge is directly discharged through the mud discharge hole 5 at the bottom of the oil storage tank, and part of it is discharged on the bottom surface. Under the cooperation of the cleaning device 4, it is discharged from the mud discharge hole, so reciprocating, until the cleaning is completed, the power source stops working.

It should be understood that the cleaning of the bottom surface and the side wall of the oil storage tank may be performed separately, or may be performed simultaneously.

It should be understood that the above-mentioned embodiments are for the purpose of illustration and description only, and those skilled in the art can make many modifications and changes without departing from the scope of the present invention.

Claims (10)

1. a kind of oil storage tank cleaning systems, including：Guide rail bracket（2）, side wall cleaning device（3）With bottom surface cleaning device（4）, its In,

The guide rail bracket（2）It is attached to the top open part of oil storage tank；

The side wall cleaning device（3）It is attached to the guide rail bracket（2）, and the side wall cleaning device（3）Led relative to described Rail gantry（2）It is removable, the side wall cleaning device（3）Including chassis（31）With side wall cleaning body（32）, the chassis（31） Including the first running gear（311）And bottom plate（312）, the bottom plate is fixed to the first running gear, first running gear It may move in the bottom surface of oil storage tank, the side wall cleaning body (32) includes framework (321), roller bearing (322), driver (323) With spatula (324), the framework is fixed on bottom plate, and the two ends of the roller bearing are arranged on framework, the driver and roller bearing One end connection, drive the roller bearing to be rotated relative to the framework, the spatula is fixed on the roller bearing, towards oil storage tank Side wall cloth put；

The bottom surface cleaning device (4) includes control unit (41) and cleaning unit (42), and described control unit is located at oil storage tank The central area of bottom surface, including the first motor (411), the second motor (412), reductor (413), blade wheel (414) and rotation Frame (415), first motor connection drives the blade wheel to rotate to reductor, and by reductor, second motor The reductor is connected to, and drives the swivel mount to rotate by the reductor, the cleaning unit includes frame (421), the second running gear (422), conveyer belt (423) and multiple scraper plates (424), the frame are connected to by retractor device The swivel mount, the scraper plate is fixed on the conveyer belt, follows the transmission Tape movement.

2. oil storage tank cleaning systems according to claim 1, it is characterised in that the side wall cleaning device（3）Also include Ream is shoveled（33）, ream shovel is fixed on the frame facet.

3. oil storage tank cleaning systems according to claim 1 or 2, it is characterised in that the roller bearing（322）For segmented , by many sub- roller bearings（3221）Composition, every sub- roller bearing has a corresponding driver（323）, drive it to revolve Turn, spatula is respectively and fixedly provided with every sub- roller bearing.

4. described oil storage tank cleaning systems according to claim 3, it is characterised in that the side wall cleaning body（32）Also Including sheath（326）, the sheath is located between two adjacent sub- roller bearings, for protecting the driver between sub- roller bearing, and Spatula is fixed with the sheath.

5. described oil storage tank cleaning systems according to claim 3, it is characterised in that the side wall cleaning body（32）Also Including limiting plate（327）, the limiting plate is fixed on the framework（321）On, positioned at sub- roller bearing outer wall and oil storage tank inner-wall it Between.

6. oil storage tank cleaning systems according to claim 3, it is characterised in that the driver（323）For core motor, The core motor is connected with air inlet pipe（328）, opened for being passed through into the core motor on gases at high pressure, and the roller bearing Provided with the stomata discharged for gases at high pressure（329）.

7. described oil storage tank cleaning systems according to claim 1, it is characterised in that the cleaning unit（42）Also include Dial mud device（44）, described group of mud device（44）Including driving lever（441）With the spring positioned at driving lever both sides（442）, the driving lever Positioned at the front of conveyer belt, the spring one end is fixed on the driving lever, and the other end is fixed in the frame so that described Driving lever can be movable relative to the conveyer belt.

8. the described oil storage tank cleaning systems according to claim 1 or 7, it is characterised in that the cleaning unit（42）Also Including revolving support（425）, the revolving support is arranged in the top of frame, and is connected to the linkage.

9. described oil storage tank cleaning systems according to claim 1, it is characterised in that the bottom of the oil storage tank is provided with Mudhole（5）, the mudhole is uniformly distributed in the bottom of oil storage tank at equal intervals, for greasy filth discharge.

10. a kind of oil storage tank clean method, using the oil storage tank cleaning systems described in any one of claim 1-9, it is special Levy and be, comprise the following steps：

S1. nitrogen is injected into oil storage tank；

S2. first running gear is made to start movement, the side wall cleaning device is moved along the track that guide rail bracket is limited, together When driver drive roller bearing rotation so that scraper plate strikes off to the greasy filth on oil storage tank inner-wall；

S3. the first motor is started, the blade wheel starts rotation, central area greasy filth discharged, the first motor is stopped, and opens Dynamic second motor, swivel mount starts rotation, by the cleaning finite element rotation to clear position, and retractor device stretches, and makes described clear Unit is managed from central area to close to the movement of inner wall of oil tank direction, conveyer belt is driven in cleaning unit moving process so that scraped Shovel and the greasy filth of oil storage tank bottom surface cleared up, then retractor device shrinks, make it is described clear up unit from inner wall of oil tank direction to Close to the movement of central area direction, the second motor is again started up, it is so past by cleaning finite element rotation to next clear position It is multiple.