Oil tank cleaning device

Abstract

The utility model discloses an oil tank cleaning device which comprises a cleaning pipeline, the cleaning pipeline can rotate relative to an oil tank to be cleaned, a downstream opening of the cleaning pipeline is communicated with an ejection pipeline capable of synchronously rotating along with rotation of the cleaning pipeline, and the ejection pipeline comprises a vertical section. The injection pipeline is communicated with a downstream opening of the cleaning pipeline in a rotatable mode, the rotation direction is rotation of a vertical section of the injection pipeline on a vertical plane, the cleaning pipeline and the injection pipeline are arranged in a staggered mode in the vertical direction, and the injection pipeline further comprises a driving structure used for driving the injection pipeline to rotate. The driving structure is arranged to be capable of synchronously rotating along with rotation of the cleaning pipeline. The device can rotate in the horizontal direction, the ejection pipeline can rotate in the vertical plane, efficient cleaning is achieved, the manual mode that an operator enters a tank to wash and scrub is replaced, the labor intensity of the operator is greatly reduced, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil tank cleaning, in particular to an oil tank cleaning device. Background Art

[0002] The Tahe Oilfield boasts high reserves of extra-heavy oil, with an asphaltene content of 25%-62%, underground crude viscosity of 260-736 mPa·s, surface viscosity of 1.0×105-1.0×107 mPa·s, and a hydrogen sulfide content of 1.0×104-1.2×105 mg / m3. Extra-heavy oil exhibits fluidity within the formation, and its viscosity increases as the temperature decreases during lifting.

[0003] On-site management presents a significant challenge and high risk in cleaning ground crude oil storage tanks. First, a steam truck is required to heat the oil inside the tanks. Second, because the crude oil contains hydrogen sulfide, the oil must be released from the tanks. Finally, personnel wearing positive-pressure respirators must enter the tanks to perform the cleanup.

[0004] There are two main problems with this cleaning method. First, manual entry into confined spaces poses safety risks such as poisoning, suffocation, and flash explosions. Second, the viscosity of the oil and changes in hydrogen sulfide concentration make the operation difficult, time-consuming, and inefficient. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a "new type of oil tank cleaning device" to solve the cleaning problem of high hydrogen sulfide content heavy oil tanks in Tahe Oilfield. High-pressure brine is combined with water vapor to form high-pressure and high-speed hydraulic power through the cleaning device to dissolve the oil in the cleaning tank and then extract it through an oil recovery pump (which can be connected to the opening at the bottom of the tank through a pipe).

[0006] The technical solutions provided are as follows:

[0007] and a tube connecting the discharging opening of the cleaning agent to the outlet port and the tube connecting the discharging opening of the cleaning agent to be used for the cleaning of the cleaning agent.

[0008] Preferably, the driving structure includes a first transmission rod, a universal joint, a second transmission rod, a first bevel gear and a second bevel gear. The upper end of the first transmission rod forms the operating end, the lower end of the first transmission rod passes through the tank mouth and extends into the tank to be cleaned and is connected to the upper end of the universal joint. The lower end of the universal joint is connected to the upper end of the second transmission rod. The lower end of the second transmission rod is fixedly sleeved with a second bevel gear arranged in a horizontal direction. The injection pipeline also includes an elbow located upstream of its vertical section and connected to the vertical section. The horizontal section of the elbow is fixedly sleeved with the first bevel gear arranged in a vertical direction at a position corresponding to the second bevel gear. The second bevel gear engages with the first bevel gear. The first bevel gear forms the output end. The first transmission rod is adjacent to the cleaning pipeline, and the second transmission rod is farther away from the cleaning pipeline than the first transmission rod.

[0009] Preferably, a first sleeve is fixedly installed on the cleaning pipeline at a position close to the outer wall of the tank to be cleaned and corresponding to the outer wall of the first transmission rod. The first transmission rod is rotatably arranged in the first sleeve and the rotating cleaning pipeline can drive the driving mechanism to rotate through the first sleeve.

[0010] Preferably, a second sleeve is fixedly installed on the cleaning pipeline at a position inside the tank to be cleaned and corresponding to the outer wall of the second transmission rod. The second sleeve is fixedly connected to the outer wall through an extension plate. First bearings are installed at both upper and lower ends of the second sleeve. The second transmission rod is rotated through the two first bearings and the rotating cleaning pipeline arranged in the second sleeve can drive the driving mechanism to rotate through the second sleeve.

[0011] Preferably, it further comprises a wrench which is sleeved and fixed on the upper end of the first transmission rod.

[0012] Preferably, a second bearing is provided at the tank mouth, the cleaning pipeline and the first transmission rod both pass through the inner ring of the second bearing, and the cleaning pipeline is fixedly connected to the inner side surface of the inner ring.

[0013] Preferably, the cleaning pipeline includes a water line and an air line, and also includes a large tray and a small tray, both of which have openings in the middle. The large tray is arranged at the tank mouth and its opening corresponds to the tank mouth. The small tray is arranged on the upper part of the large tray and its lower part is welded to the upper part of the large tray. The second bearing is sleeved inside the opening of the small tray, and also includes a pressing sleeve, which is arranged on the upper part of the second bearing. An annular plate is fixed at two relative positions on the inner side surface of the pressing sleeve, and the two annular plates are respectively welded to the water line. No annular plates are set at the remaining two relative positions on the inner side surface of the pressing sleeve, so that two relative gaps are formed between the two places and the water line, which correspond one to one for the air line and the first transmission rod to pass through. The downstream opening of the air line passes through the gap and extends downward to connect to the water line. The water line is externally connected to the high-pressure water line, and the air line is externally connected to the steam line.

[0014] Preferably, the water pipeline includes a water inlet pipe, a straight pipe and a bent neck pipe arranged in the upstream and downstream directions and connected in sequence, the water inlet pipe is connected to the high-pressure water pipeline, the upper end of the straight pipe is located outside the oil tank to be cleaned and is connected to the water inlet pipe through a first rotary joint, and the lower end extends toward the bottom of the oil tank to be cleaned, the upper end of the bent neck pipe is connected to the lower end of the straight pipe, the lower end of the bent neck pipe forms the downstream opening of the cleaning pipeline, and the downstream opening of the air pipeline is connected to the position of the straight pipe close to the bent neck pipe.

[0015] Preferably, the lower end of the bent neck pipe is connected to the elbow of the injection pipeline through a second rotary joint.

[0016] Preferably, the water inlet pipe includes a horizontal water inlet section located upstream thereof, and a lifting lug is fixed on the horizontal water inlet section.

[0017] The provided oil tank cleaning device has the following technical effects:

[0018] By rotating the cleaning pipeline, the output pipeline that rotates synchronously with it can be located at different positions in the tank, and by driving the injection pipeline to rotate by the driving structure, the injection pipeline can be rotated 360 degrees in the vertical plane, so that the cleaning agent can enter the tank in different directions during the rotation. The injection pipeline can achieve 360-degree rotation in the horizontal direction along with the cleaning pipeline, and then cleaning is carried out during the rotation process, achieving a fast and efficient cleaning effect; this device avoids the risk of personnel entering the oil tank for cleaning operations, and the cleaning operation is safe, convenient and efficient.

[0019] Preferably, a first sleeve and a second sleeve are provided to limit the first transmission rod and the second transmission rod respectively, and the contact between the first sleeve and the first transmission rod is in a state of just contact. This contact state enables, after an external force is applied to the first transmission rod, to overcome the friction of the first sleeve on the first transmission rod and thus enable the first transmission rod to rotate within the first sleeve. At the same time, under the interaction of forces, the friction between the first transmission rod and the first sleeve can drive the first sleeve to rotate. The first sleeve is fixed to the cleaning pipeline, and due to the provision of the second bearing, it can drive the water pipeline to rotate synchronously. That is, by pulling the wrench, the second bearing above the large tray can be driven to rotate, thereby realizing the rotation of the entire device in the horizontal direction of the tank mouth. At the same time, it can also drive the first transmission rod, the second transmission rod, and the universal joint to drive the injection pipeline to rotate.

[0020] Preferably, a bend pipe is provided and the connection position of the water pipeline and the gas pipeline is limited, which can extend the water path. At the same time, sufficient time is left for the water flow to be heated, so as to better clean the inside of the oil tank.

[0021] Preferably, a first rotary joint is provided to facilitate the high-pressure water line and the water inlet pipe to maintain their position during horizontal rotation of the entire device, preventing bending. In addition, a lifting lug is provided to further fix the direction of the water inlet pipe, which cooperates with the first rotary joint to prevent bending of the external water pipe.

[0022] Preferably, in order to keep the second transmission rod rotating stably, two first bearings are provided in the second sleeve to improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the oil tank cleaning device;

[0024] Figure 2 Oil tank cleaning device Figure 1 Schematic diagram of the local structure at point A;

[0025] Figure 3 Schematic diagram of the cross-sectional structure of the oil tank cleaning device;

[0026] Figure 4 Schematic diagram of the structure of the large tray and other components installed at the tank mouth when the oil tank cleaning device is in use.

[0027] Figure 1-4 The accompanying drawings are numerals as follows:

[0028] 1. Large tray; 2. Small tray; 3. Second bearing; 4. Press sleeve; 5. Water inlet pipe; 6. Straight pipe; 7. Bent neck pipe; 8. Air pipe; 9. Vertical section; 10. Second rotary joint; 11. First bevel gear; 12. First transmission rod; 13. First sleeve; 14. Second transmission rod; 15. Second sleeve; 16. Universal joint; 17. Second bevel gear; 18. Lifting lug; 19. Extension plate; 20. Elbow; 21. First bearing; 22. Wrench; 23. Spiral guide plate; 24. First rotary joint; 25. Cock; 26 Annular plate; 27 Gap. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below.

[0030] The present invention will be described in more detail below with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art may modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as a general guide for those skilled in the art and not as a limitation of the present invention.

[0031] For the sake of clarity, not all features of the actual embodiments are described. In the following description, well-known functions and structures are not described in detail because they would obscure the present invention with unnecessary detail. It should be understood that in the development of any actual embodiment, numerous implementation details must be made to achieve the developer's specific goals.

[0032] In order to make the purpose and features of the present invention more obvious and easy to understand, the following is a further description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0033] Combine Figure 1-4The cleaning agent is connected to the cleaning agent in a rotating manner so as to allow the cleaning agent to be discharged from the cleaning tank, thereby ensuring that the cleaning agent is discharged from the cleaning tank.

[0034] Among them, the downstream opening of the cleaning pipeline is connected to an injection pipeline that can rotate synchronously with the rotation of the cleaning pipeline, which means that the rotation of the cleaning pipeline is relative to its axis, and the synchronous rotation of the injection pipeline means that the injection pipeline can also rotate around the axis of the cleaning pipeline.

[0035] By rotating the cleaning pipeline, the output pipeline that rotates synchronously with it can be located at different positions in the tank, and by driving the injection pipeline to rotate by the driving structure, the injection pipeline can be rotated 360 degrees in the vertical plane, so that the cleaning agent can enter the tank in different directions during the rotation. The injection pipeline can achieve 360-degree rotation in the horizontal direction along with the cleaning pipeline, and then cleaning is carried out during the rotation process, achieving a fast and efficient cleaning effect; this device avoids the risk of personnel entering the oil tank for cleaning operations, and the cleaning operation is safe, convenient and efficient.

[0036] The outlet of the vertical section 9 of the injection pipeline is in the shape of a nozzle with a closed end.

[0037] like Figure 1-4As shown, in a specific embodiment, the driving structure includes a first transmission rod 12, a universal joint 16, a second transmission rod 14, a first bevel gear 11 and a second bevel gear 17, the upper end of the first transmission rod 12 forms the operating end, the lower end of the first transmission rod 12 passes through the tank mouth and extends into the tank to be cleaned and is connected to the upper end of the universal joint 16, the lower end of the universal joint 16 is connected to the upper end of the second transmission rod 14, the lower end of the second transmission rod 14 is fixedly sleeved with a second bevel gear 17 arranged in the horizontal direction, the injection pipeline also includes an elbow 20 located upstream of its vertical section 9 and connected to the vertical section 9, the horizontal section of the elbow 20 is fixedly sleeved with a first bevel gear 11 arranged in the vertical direction at a position corresponding to the second bevel gear 17, the second bevel gear 17 engages the first bevel gear 11, and the first bevel gear 11 forms the output end, the first transmission rod 12 is adjacent to the cleaning pipeline, and the second transmission rod 14 is away from the cleaning pipeline compared to the first transmission rod 12.

[0038] Among them, a first sleeve 13 is fixedly installed on the cleaning pipeline at a position located in the tank to be cleaned and corresponding to the outer wall of the first transmission rod 12, adjacent to the outer wall. The first transmission rod 12 is rotatably arranged in the first sleeve 13, and the rotating cleaning pipeline can drive the driving mechanism to move synchronously with the rotation of the cleaning pipeline through the first sleeve 13. A second sleeve 15 is fixedly installed on the cleaning pipeline at a position located in the tank to be cleaned and corresponding to the outer wall of the second transmission rod 14. The second sleeve 15 is fixedly connected to the outer wall via an extension plate 19. First bearings 21 are installed at the upper and lower ends of the second sleeve 15. The second transmission rod 14 is rotatably arranged in the second sleeve 15 via the two first bearings 21, and the rotating cleaning pipeline can drive the driving mechanism to rotate through the second sleeve 15.

[0039] The device further comprises a wrench 22 which is sleeved and fixed on the upper end of the first transmission rod 12 .

[0040] The cleaning pipeline includes a water line and an air line 8, and also includes a large tray 1 and a small tray 2, both of which have openings in the middle. The large tray 1 is arranged at the tank mouth and its opening corresponds to the tank mouth. The small tray 2 is arranged on the upper part of the large tray 1 and its lower part is welded to the upper part of the large tray 1. The second bearing 3 is sleeved inside the opening of the small tray 2, and also includes a pressing sleeve 4, which is arranged on the upper part of the second bearing 3. An annular plate 26 is fixed at two relative positions on the inner side of the pressing sleeve 4, and the two annular plates 26 are respectively welded to the water line. The remaining two relative positions on the inner side of the pressing sleeve 4 are not provided with annular plates so that two opposite gaps 27 are formed between the two places and the water line, which correspond one to one for the air line 8 and the first transmission rod 12 to pass through. The downstream opening of the air line 8 passes through the gap 27 and extends downward to connect to the water line. The water line is externally connected to the high-pressure water line, and the air line 8 is externally connected to the steam line.

[0041] A first sleeve 13 and a second sleeve 15 are provided to limit the first transmission rod 12 and the second transmission rod 14, respectively. The first sleeve 13 and the first transmission rod 12 are in a state of just-contact. This contact state allows the first transmission rod 12 to rotate within the first sleeve 13 after an external force is applied to the first transmission rod 12, overcoming the friction of the first sleeve 13 on the first transmission rod 12. Simultaneously, under the interaction of the forces, the friction between the first transmission rod 12 and the first sleeve 13 drives the first sleeve 13 to rotate. The first sleeve 13 is fixed to the cleaning pipeline and, due to the provision of the second bearing 3, can drive the water pipeline to rotate synchronously. Similarly, the second sleeve 15 and the second transmission rod 14 are also in a state of just-contact. That is, by turning the wrench 22, the second bearing 3 above the large tray 1 can be driven to rotate, thereby achieving the entire device rotating in the horizontal direction of the tank mouth. At the same time, it can also drive the first transmission rod 12, the second transmission rod 14, and the universal joint 16 to drive the injection pipeline to rotate.

[0042] In a specific embodiment, a second bearing 3 is provided at the tank mouth, the cleaning pipeline and the first transmission rod 12 both pass through the inner ring of the second bearing 3, and the cleaning pipeline is fixedly connected to the inner side surface of the inner ring.

[0043] Among them, Figure 1-4As shown, the water pipeline includes an inlet pipe 5, a straight pipe 6, and a curved neck pipe 7 arranged in an upstream and downstream direction and connected in sequence. The inlet pipe 5 is connected to the high-pressure water pipeline. The upper end of the straight pipe 6 is located outside the oil tank to be cleaned and connected to the inlet pipe 5 via a first rotary joint 24. The lower end extends to the bottom of the oil tank to be cleaned. The upper end of the curved neck pipe 7 is connected to the lower end of the straight pipe 6, and the lower end of the curved neck pipe 7 forms the downstream opening of the cleaning pipeline. The downstream opening of the air line 8 is connected to the position of the straight pipe 6 near the curved neck pipe. The straight pipe 6 is welded to the annular plate 26.

[0044] The elbow pipe 7 is provided and the connecting position of the water pipeline and the gas pipeline 8 is limited, which can extend the water path. At the same time, sufficient time is left for the water flow to be heated, so as to better clean the inside of the oil tank.

[0045] The lower end of the elbow pipe 7 is connected to the elbow 20 of the injection pipeline through a second rotary joint 10, and the water inlet pipe 5 includes a horizontal water inlet section located upstream thereof, and a lifting lug 18 is fixed on the horizontal water inlet section.

[0046] In a specific embodiment, a spiral guide plate 23 is provided inside the water pipeline, that is, inside the straight pipe 6 , and the high-pressure water rotates in a vortex shape after passing through the spiral guide plate 23 inside the water pipeline.

[0047] A cock 25 is also provided at the inlet of the air line 8 to facilitate air intake control. The first and second rotary joints are readily available and will not be further described here. Rotary joints are also well known to those skilled in the art.

[0048] Specifically, the implementation includes the following steps:

[0049] 1. Installation: First, place the large tray 1 and the small tray 2 as a whole at the tank mouth, then put the large bearing 3 into the small tray 2, and finally insert the other devices into the small tray 2. The press sleeve 4 welded on the water pipe line sits on the large bearing 3 to complete the installation.

[0050] 2. Usage: The water line is connected to a high-pressure water line, and the gas line is connected to a steam line. The high-pressure water passes through the spiral guide plate 23 in the device and rotates in a vortex. It flows through the inlet of the gas line 8 and mixes with the steam to increase the water temperature. It is ejected from the injection line 9 in a spray form to achieve the best high-pressure jet cleaning requirement. By turning the wrench 22, the large bearing 3 above the tray is driven to rotate, thereby realizing the horizontal rotation of the device in the tank mouth. At the same time, the first transmission rod 12 is driven to drive the injection line 9 to rotate 360 ​​degrees in the vertical direction, thereby achieving a cleaning effect without dead angles during the rotation of the device.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Therefore, the above description is only an embodiment of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiment. The above embodiment and description only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention also includes various equivalent changes and improvements, which will fall within the scope of the present invention. The scope of protection claimed in this utility model is defined by the appended claims and their equivalents.

Claims

1. An oil tank cleaning device, characterized in that: The cleaning line is connected to the cleaning agent in a rotatable manner, and the cleaning agent is connected to the cleaning agent in a rotatable manner.

2. The oil tank cleaning device according to claim 1, characterized in that: The driving structure includes a first transmission rod, a universal joint, a second transmission rod, a first bevel gear and a second bevel gear. The upper end of the first transmission rod forms the operating end, the lower end of the first transmission rod passes through the tank mouth and extends into the tank to be cleaned and is connected to the upper end of the universal joint. The lower end of the universal joint is connected to the upper end of the second transmission rod. The lower end of the second transmission rod is fixedly sleeved with a second bevel gear arranged in a horizontal direction. The injection pipeline also includes an elbow located upstream of its vertical section and connected to the vertical section. The horizontal section of the elbow is fixedly sleeved with the first bevel gear arranged in a vertical direction at a position corresponding to the second bevel gear. The second bevel gear meshes with the first bevel gear. The first bevel gear forms the output end. The first transmission rod is adjacent to the cleaning pipeline, and the second transmission rod is farther away from the cleaning pipeline than the first transmission rod.

3. The oil tank cleaning device according to claim 2, characterized in that: A first sleeve is fixedly installed on the cleaning pipeline at a position close to the outer wall of the tank to be cleaned and corresponding to the outer wall of the first transmission rod. The first transmission rod is rotatably arranged in the first sleeve, and the rotating cleaning pipeline can drive the driving structure to rotate through the first sleeve.

4. The oil tank cleaning device according to claim 3, characterized in that: A second sleeve is fixedly installed on the cleaning pipeline at a position inside the tank to be cleaned and corresponding to the outer wall of the second transmission rod. The second sleeve is fixedly connected to the outer wall through an extension plate. First bearings are installed at both upper and lower ends of the second sleeve. The second transmission rod is rotated through the two first bearings and the rotating cleaning pipeline arranged in the second sleeve can drive the driving structure to rotate through the second sleeve.

5. The oil tank cleaning device according to claim 4, characterized in that: It also includes a wrench, which is sleeved and fixed on the upper end of the first transmission rod.

6. The oil tank cleaning device according to claim 5, characterized in that: A second bearing is provided at the tank mouth, the cleaning pipeline and the first transmission rod both pass through the inner ring of the second bearing, and the cleaning pipeline is fixedly connected to the inner side surface of the inner ring.

7. The oil tank cleaning device according to claim 6, characterized in that: The cleaning pipeline includes a water line and an air line, and also includes a large tray and a small tray, both of which have openings in the middle. The large tray is arranged at the tank mouth and its opening corresponds to the tank mouth. The small tray is arranged on the upper part of the large tray and its lower part is welded to the upper part of the large tray. The second bearing is sleeved inside the opening of the small tray, and also includes a pressing sleeve, which is arranged on the upper part of the second bearing. An annular plate is fixed at two relative positions on the inner side of the pressing sleeve, and the two annular plates are respectively welded to the water line. No annular plates are set at the remaining two relative positions on the inner side of the pressing sleeve, so that two relative gaps are formed between the two places and the water line, which correspond one to one for the air line and the first transmission rod to pass through. The downstream opening of the air line passes through the gap and extends downward to connect to the water line. The water line is externally connected to a high-pressure water line, and the air line is externally connected to a steam line.

8. The oil tank cleaning device according to claim 7, characterized in that: The water pipeline includes a water inlet pipe, a straight pipe and a bent neck pipe arranged in the upstream and downstream directions and connected in sequence. The water inlet pipe is connected to the high-pressure water pipeline. The upper end of the straight pipe is located outside the oil tank to be cleaned and is connected to the water inlet pipe through a first rotary joint. The lower end extends toward the bottom of the oil tank to be cleaned. The upper end of the bent neck pipe is connected to the lower end of the straight pipe. The lower end of the bent neck pipe forms the downstream opening of the cleaning pipeline. The downstream opening of the air pipeline is connected to the position of the straight pipe close to the bent neck pipe.

9. The oil tank cleaning device according to claim 8, characterized in that: The lower end of the bent neck pipe is connected to the elbow of the injection pipeline through a second rotary joint.

10. The oil tank cleaning device according to claim 9, characterized in that: The water inlet pipe includes a horizontal water inlet section located upstream thereof, and a lifting lug is fixed on the horizontal water inlet section.

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