An internal cleaning device for oil pipelines

Abstract

The present invention relates to an internal cleaning device for an oil pipeline. The cleaning device includes a cleaning assembly, and the cleaning assembly includes a cleaning housing, a cleaning shaft, and a positioning assembly. The cleaning housing includes an outer shell, a partition plate, a heating pipe, and a transmission pipe. The partition plate is vertically arranged at the rear part inside the outer shell. The heating pipe is coaxially arranged at the front part inside the outer shell, and an induction heating coil is wound around the outside of the heating pipe. The transmission pipe is coaxially arranged at the rear part inside the outer shell. The cleaning shaft is axially arranged inside the cleaning housing, and the cleaning housing and the cleaning shaft rotate synchronously and in the same direction. The positioning assembly includes a positioning block and a positioning rod. The positioning block is arranged at the front end of the cleaning shaft, and the rear end face of the positioning block is an inclined surface. One end of the positioning rod is fixedly connected to the heating pipe, and the other end slidably fits on the inclined surface of the rear end of the positioning block. The purpose of the present invention is to solve or at least alleviate the problems that when the wax condensation phenomenon on the inner wall of the oil pipeline is serious, the current pigging device cannot achieve the expected pigging effect and the pigging efficiency is not high, and to provide an internal cleaning device for an oil pipeline.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline cleaning equipment, and particularly relates to an internal cleaning device for oil pipelines. Background Art

[0002] In the transportation of oil pipelines, with the different climate temperatures of the pipeline laying areas and the increase of the operation time, when the pipeline transports high-wax crude oil, there often occurs a phenomenon that a certain thickness of paraffin, gum, congealed oil, sand and other impurity mixtures are deposited on the inner wall of the pipeline. The reason for this phenomenon is that some crude oil properties have high low-temperature viscosity and high pour point, and the wax content in it is relatively high. According to the characteristics of wax, the solubility of wax in crude oil decreases with the decrease of temperature. Therefore, when the wall temperature of the crude oil transportation pipeline is lower than the wax precipitation point, wax crystals continuously precipitate on the pipe wall, that is, "wax deposition" is formed. This will not only reduce the effective pipe diameter and the oil transportation volume, but also increase the pressure drop and even block the crude oil transportation pipeline.

[0003] Especially in areas with relatively low room temperature, affected by the low temperature, the phenomenon of "wax deposition" is very prominent. According to statistics, crude oil with a wax mass fraction exceeding 10% accounts for almost 90% of the total output crude oil, and most of the crude oil has a wax mass fraction of more than 20%, and some even as high as 40% - 50%. During the process of hot oil flowing forward along the pipeline in a hot oil pipeline, since its oil temperature is much higher than the ambient temperature around the pipeline, under the drive of the radial temperature difference, the heat carried by the oil flow will continuously dissipate to the outside of the pipe, and the oil flow continuously cools down, which makes the wax crystals gradually precipitate and deposit in the pipeline, reducing the pipe diameter, increasing the friction resistance, increasing the power consumption, and reducing the pipeline transportation capacity. In severe cases, the crude oil can lose its fluidity, leading to a pipe blockage accident, bringing many difficulties to the transportation and thus affecting the normal production safety.

[0004] In the prior art, the self-power supply technology of pipeline cleaning equipment can refer to CN108714603B; the design of the universal connection structure can refer to CN107127194B; the layout of the cleaning components can refer to CN109807119A. In order to clean the pipeline, a pig is usually used. Currently, after the pig is sent out by the oil delivery station through the sending device, it moves along with the oil flow relying on the crude oil pressure of the oil delivery station. Since the diameter of the pig itself is slightly larger than the inner diameter of the pipeline, and the pig itself is equipped with many scraping plates and steel brushes. Therefore, during the process of the pig moving along with the oil flow, the scraping plates and steel brushes form a great frictional force on the inner wall of the pipeline, and use its mechanical function to remove the attachments on the pipe wall. However, the wax crystals precipitated at low temperature are relatively hard and have a smooth surface, and the pig cannot achieve the expected pipe cleaning effect, and the pipe cleaning efficiency is not high; when the congealed wax on the inner wall of the pipeline is serious, it will even block the movement of the pig in the pipeline. Summary of the Invention

[0005] The object of the present invention is to overcome the deficiencies in the prior art, solve or at least alleviate the problem that when the wax condensation phenomenon on the inner wall of the oil pipeline is serious, the current pigging device cannot achieve the expected pigging effect and the pigging efficiency is not high, and provide an internal cleaning device for the oil pipeline.

[0006] The present invention is realized through the following technical solutions:

[0007] An internal cleaning device for an oil pipeline, the cleaning device includes a cleaning component, and the cleaning component includes a cleaning shell, a cleaning shaft and a positioning component;

[0008] The cleaning shell includes a housing, a partition plate, a heating pipe and a transmission pipe. The housing is a spherical shell with an open front end. A plurality of jet holes are evenly distributed in the circumferential direction in the middle of the side wall of the housing. The partition plate is annular and vertically arranged at the rear part inside the housing. The heating pipe is circular tubular and coaxially arranged at the front part inside the housing. The front end of the heating pipe is hermetically connected to the front end of the housing. The rear end of the heating pipe is connected to the partition plate and communicated with the jet holes. An induction heating coil is wound outside the heating pipe. The transmission pipe is coaxially arranged at the rear part inside the housing, and the front and rear ends of the transmission pipe are respectively connected to the partition plate and the inner wall of the housing;

[0009] The cleaning shaft is axially arranged inside the cleaning shell. The front section of the cleaning shaft is located inside the heating pipe. The rear section of the cleaning shaft is axially slidably arranged inside the transmission pipe. The cleaning shell and the cleaning shaft rotate synchronously in the same direction. A spring is arranged between the cleaning shaft and the housing, and the spring drives the cleaning shell to slide towards the front end of the cleaning shaft;

[0010] The positioning component includes a positioning block and a positioning rod. The positioning block is coaxially and fixedly rotatably arranged at the front end of the cleaning shaft. The rear end face of the positioning block is an inclined surface. The positioning block translates along the axial direction of the oil pipeline. The positioning rod is radially arranged inside the heating pipe. One end of the positioning rod is fixedly connected to the heating pipe, and the other end slidably fits against the rear inclined surface of the positioning block.

[0011] In order to further implement the present invention, the following technical solutions can be preferably selected:

[0012] Preferably, a linkage rod is fixedly arranged along the rear part of the cleaning shaft. The linkage rod is arranged in parallel and at an interval with the cleaning shaft. The rear end of the linkage rod is fixedly connected to the cleaning shaft, and the front end is slidably sleeved on the partition plate.

[0013] Preferably, the spring is located inside the transmission pipe and is slidably sleeved on the cleaning shaft. The front and rear ends of the spring respectively abut against the partition plate and the rear part of the cleaning shaft.

[0014] Preferably, a plurality of support rods are evenly distributed in the circumferential direction at the front end of the positioning block. One end of each support rod is hinged to the positioning block through a torsion spring, and the other end abuts against the inner wall of the oil pipeline. The support rods enable the positioning block to translate along the axial direction of the oil pipeline.

[0015] Preferably, the cleaning device further comprises a power assembly, and the power assembly and the cleaning assembly are hinged to each other;

[0016] The power assembly includes a power shell and a power shaft. The power shell is in the shape of a shell with an opening at the rear end. A plurality of guide holes are arranged at the front of the power shell along its axial direction. The power shaft is fixedly rotatably arranged in the power shell. A plurality of blades are evenly distributed on a circle of the power shaft located in the power shell. The front end of the power shaft extends out of the power shell and is transmission-connected to the rear end of the cleaning shaft.

[0017] Preferably, the cleaning device further comprises a power generation component, wherein the power generation component is located between the power component and the cleaning component, and the cleaning component and the power component are hinged to each other at the front and rear ends of the power generation component.

[0018] The power generation assembly includes a power generation shell, a power generation shaft and a generator. The power generation shell is in the shape of a sealed shell. The power generation shaft is fixedly rotatably arranged in the power generation shell. Both ends of the power generation shaft extend out of the power generation shell. The front and rear ends of the power generation shaft are respectively connected to the rear end of the cleaning shaft and the front end of the power shaft. The generator is fixedly arranged in the power generation shell and is transmission-connected to a section of the power generation shaft located in the power generation shell.

[0019] Preferably, a connecting shaft is provided between the power generation component and the power component and between the power generation component and the cleaning component;

[0020] Both ends of the connecting shaft are spherical, the longitudinal sections of the front end of the power shaft, the front and rear ends of the power shaft and the rear end of the cleaning shaft are C-shaped, and the spherical end of the connecting shaft is rotatably engaged with the end of the power shaft, the power shaft or the cleaning shaft;

[0021] The spherical end surface of the connecting shaft is provided with a first groove along the length direction of the connecting shaft, and the first groove is multiple and arranged in a circular array. The inner side of the end of the power shaft, the power generation shaft or the cleaning shaft is provided with a second groove, and the number of the second grooves is equal to the first grooves and they are arranged one by one. The cross-sections of the first groove and the second groove form a circle, and a ball is embedded between the first groove and the second groove, and the ball is located in the first groove for a section and in the second groove for a section.

[0022] Preferably, the power shell is hemispherical, and the power generation shell is spherical.

[0023] Preferably, cleaning strips are arranged on the outer circumference of the cleaning shell along the length direction of the cleaning axis, and the cleaning strips are multiple and evenly distributed on the circumference, and the cleaning strips and the spray holes are arranged alternately one by one.

[0024] Through the above technical solution, the beneficial effects of the present invention are:

[0025] An induction heating coil is wound around the outside of the heating pipe of the present invention. When an alternating current of a certain frequency flows through the induction heating coil, an alternating magnetic flux of the same frequency will be generated. The alternating magnetic flux will generate an induced electromotive force in the cleaning shaft made of a metal material, thereby generating an induced current and generating heat. This heat will heat the liquid flowing into the heating pipe from the front end of the cleaning shell and flow out from the spray holes of the outer shell, softening the wax crystal solids attached to the inner wall of the pipeline, improving the working efficiency of the pig, increasing the actual pipeline transportation volume, and further improving the pipeline transportation efficiency.

[0026] When the cleaning shaft drives the cleaning shell to rotate to clean the inner wall of the pipeline, it also drives the cleaning shell to reciprocate back and forth relative to the cleaning shaft through the rotation of the cleaning shaft, cleaning the same area multiple times, and significantly improving the final cleaning effect. Brief Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the present invention;

[0028] Figure 2 is a structural sectional view of the present invention;

[0029] Figure 3 is a schematic structural diagram of the cleaning component of the present invention;

[0030] Figure 4 is a schematic structural diagram of the cleaning component of the present invention;

[0031] Figure 5 is a structural sectional view of the cleaning shell of the present invention;

[0032] Figure 6 of the present invention Figure 5 Cross-sectional view taken along line A-A;

[0033] Figure 7 is a schematic structural diagram of the cleaning shaft of the present invention;

[0034] Figure 8 is a schematic structural diagram of the positioning block and the support rod of the present invention;

[0035] Figure 9 is a schematic structural diagram of the power component of the present invention;

[0036] Figure 10 is a structural sectional view of the power component of the present invention;

[0037] Figure 11 is a schematic structural diagram of the power shell of the present invention;

[0038] Figure 12 is a structural sectional view of the power shell of the present invention;

[0039] Figure 13 is a schematic structural diagram of the power shaft of the present invention;

[0040] Figure 14 This is a structural cross-sectional view of the power generation component of the present invention;

[0041] Figure 15 This is a schematic structural view of the power generation shaft of the present invention;

[0042] Figure 16 This is a schematic structural view of the connecting shaft of the present invention;

[0043] Wherein: 1 - cleaning shell; 2 - cleaning shaft; 3 - induction heating coil; 4 - positioning block; 5 - positioning rod; 6 - linkage rod; 7 - support rod; 8 - power shell; 9 - power shaft; 10 - paddle; 11 - power generation shell; 12 - power generation shaft; 13 - generator; 14 - connecting shaft; 101 - outer shell; 102 - partition; 103 - heating tube; 104 - transmission tube. Specific embodiments

[0044] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0046] As Figures 1 - 16 shown, an internal cleaning device for an oil pipeline, the cleaning device includes a cleaning component, and the cleaning component includes a cleaning shell 1, a cleaning shaft 2, and a positioning component;

[0047] The cleaning shell 1 includes a housing 101, a partition 102, a heating pipe 103 and a transmission pipe 104. The housing 101 is a spherical shell with an open front end. A plurality of jet holes are evenly distributed circumferentially in the middle of the side wall of the housing 101. The partition 102 is annular and vertically arranged at the rear part inside the housing 101. The heating pipe 103 is circular tubular and coaxially arranged at the front part inside the housing 101. The front end of the heating pipe 103 is hermetically connected to the front end of the housing 101. The rear end of the heating pipe 103 is connected to the partition 102 and communicated with the jet holes. An induction heating coil 3 is wound around the outside of the heating pipe 103. The transmission pipe 104 is coaxially arranged at the rear part inside the housing 101. The front and rear ends of the transmission pipe 104 are respectively connected to the partition 102 and the inner wall of the housing 101;

[0048] The cleaning shaft 2 is axially arranged inside the cleaning shell 1. The front section of the cleaning shaft 2 is located inside the heating pipe 103. The rear section of the cleaning shaft 2 is axially slidably arranged inside the transmission pipe 104. The cleaning shell 1 rotates synchronously and in the same direction as the cleaning shaft 2. A spring is arranged between the cleaning shell 1 and the cleaning shaft 2. The spring drives the cleaning shell 1 to slide towards the front end of the cleaning shaft 2;

[0049] The positioning assembly includes a positioning block 4 and a positioning rod 5. The positioning block 4 is coaxially and fixedly rotatably arranged at the front end of the cleaning shaft 2. The rear end face of the positioning block 4 is an inclined plane. The positioning block 4 translates axially along the petroleum pipeline. The positioning rod 5 is radially arranged inside the heating pipe 103. One end of the positioning rod 5 is fixedly connected to the heating pipe 103 and the other end slidably fits on the rear end inclined plane of the positioning block 4.

[0050] The cleaning shell 1 is made of an insulating material, and the cleaning shaft 2 is made of a metal material. After the induction heating coil 3 is energized, the cleaning shaft 2 inside the heating pipe 103 is heated.

[0051] In the present invention, an induction heating coil 3 is wound around the outside of the heating pipe 103. When an alternating current of a certain frequency flows through the induction heating coil 3, an alternating magnetic flux of the same frequency will be generated. The alternating magnetic flux generates an induced electromotive force in the metal, thereby generating an induced current and generating heat. This heat heats the liquid flowing into the heating pipe 103 from the front end of the cleaning shell 1 and flows out from the jet holes of the housing 101, softening the wax crystal solids attached to the inner wall of the pipeline, improving the working efficiency of the pig, increasing the actual pipeline transportation volume, and further improving the pipeline transportation efficiency.

[0052] When the cleaning shaft 2 drives the cleaning shell 1 to rotate to clean the inner wall of the pipeline, the cleaning shell 1 is also driven by the rotation of the cleaning shaft 2 to reciprocate back and forth relative to the cleaning shaft 2, cleaning the same area multiple times, significantly improving the final cleaning effect.

[0053] In order for the cleaning shell 1 to rotate with the cleaning shaft 2 and be able to move axially along the cleaning shaft 2, a linkage rod 6 is fixedly arranged along the rear part of the cleaning shaft 2. The linkage rod 6 is arranged parallel and at an interval to the cleaning shaft 2. The rear end of the linkage rod 6 is fixedly connected to the cleaning shaft 2 and the front end is slidably sleeved on the partition 102.

[0054] In order to improve reliability, the spring is located in the transmission tube 104 and the slideway is sleeved on the cleaning shaft 2, and the front and rear ends of the spring respectively abut against the partition 102 and the rear of the cleaning shaft 2.

[0055] In order to prevent the positioning block 4 from rotating with the cleaning shaft 2 and thus losing the reciprocating translation function, a plurality of support rods 7 are evenly distributed on the circumference of the front end of the positioning block 4. One end of the support rod 7 is hinged to the positioning block 4 through a torsion spring, and the other end is against the inner wall of the oil pipeline. The support rod 7 enables the positioning block 4 to translate along the axial direction of the oil pipeline; a roller whose rotation direction is the same as the axial direction of the oil pipeline can be set at the front end of the support rod 7, so that the translation resistance of the support rod 7 is much smaller than the rotation resistance of the support rod 7 in the oil pipeline, thereby avoiding the rotation of the support rod 7 and ensuring that the positioning block 4 does not rotate.

[0056] In order to optimize the product structure and provide power for the rotation of the cleaning shaft 2, the cleaning device also includes a power component, and the power component and the cleaning component are hinged to each other;

[0057] The power assembly includes a power shell 8 and a power shaft 9. The power shell 8 is in the shape of a shell with an opening at the rear end. A plurality of guide holes are arranged at the front of the power shell 8 along its axial direction. The power shaft 9 is fixedly rotatably arranged in the power shell 8. A plurality of blades 10 are evenly distributed on a section of the circumference of the power shaft 9 located in the power shell 8. The front end of the power shaft 9 extends out of the power shell 8 and is transmission-connected to the rear end of the cleaning shaft 2. The liquid in the pipeline flows in from the rear end of the power shell 8 and flows out from the guide holes. When the liquid passes through the blades 10, the power shaft 9 is driven to rotate. At the same time, the liquid also drives the cleaning device to move forward along the oil pipeline.

[0058] To further optimize the product structure and provide electric energy for the induction heating coil 3, the cleaning device also includes a power generation component, which is located between the power component and the cleaning component. The front and rear ends of the power generation component are respectively connected to the cleaning component and the power component.

[0059] The power generation assembly includes a power generation shell 11, a power generation shaft 12 and a generator 13. The power generation shell 11 is in the shape of a sealed shell. The power generation shaft 12 is fixedly rotatably arranged in the power generation shell 11. Both ends of the power generation shaft 12 extend out of the power generation shell 11. The front and rear ends of the power generation shaft 12 are respectively connected to the rear end of the cleaning shaft 2 and the front end of the power shaft 9. The generator 13 is fixedly arranged in the power generation shell 11 and is transmission-connected to a section of the power generation shaft 12 located in the power generation shell 11.

[0060] In this embodiment, a storage battery, a rectifier and an inverter are arranged inside the power generation housing 11. By the rotation of the power generation shaft 12, the permanent magnet connected to the inside of the generator 13 rotates. According to the principle of electromagnetic induction, the stator winding cuts the magnetic force lines to generate electric energy. However, since the pressure of the oil flow is not a constant and stable value, the electric quantity generated by the generator 13 is also unstable. Therefore, it is necessary to convert the generated alternating current into direct current through the rectifier and store it in the storage battery, so that the electric energy generated by the generator 13 becomes chemical energy. Then, through the inverter, the chemical energy in the storage battery is converted into alternating current and stably output to the induction heating coil 3.

[0061] In this embodiment, the generator 13 adopts a small permanent magnet synchronous generator with the model of FSD-30; the storage battery selects a DZM series valve-regulated sealed lead-acid battery, whose terminal voltage is 12V, the discharge depth of the storage battery is 85%, and a margin of 20% is reserved.

[0062] In order to facilitate the cleaning device to be applicable to the turning section of the oil pipeline, connecting shafts 14 are arranged between the power generation assembly and the power assembly and between the power generation assembly and the cleaning assembly;

[0063] Both ends of the connecting shaft 14 are spherical. The longitudinal sections at the front end of the power shaft 9, the front and rear ends of the power generation shaft 12, and the rear end of the cleaning shaft 2 are all C-shaped. The spherical end portions of the connecting shaft 14 are rotationally fitted into the end portions of the power shaft 9, the power generation shaft 12 or the cleaning shaft 2;

[0064] A first groove is arranged on the surface of the spherical end of the connecting shaft 14 along the length direction of the connecting shaft 14. The first grooves are multiple and arranged in a circumferential array. A second groove is arranged inside the end portion of the power shaft 9, the power generation shaft 12 or the cleaning shaft 2. The number of the second grooves is equal to that of the first grooves and they are arranged in one-to-one correspondence. The cross sections of the first groove and the second groove form a circle. A ball is fitted between the first groove and the second groove. One section of the ball is located in the first groove and the other section is located in the second groove.

[0065] In order to ensure sufficient power and reduce the friction between the power assembly and the power generation assembly relative to the oil pipeline, the power housing 8 is hemispherical and the power generation housing 11 is spherical.

[0066] In order to further improve the cleaning effect, cleaning strips are arranged on the outer circumference of the cleaning housing 1 along the length direction of the cleaning shaft 2. The cleaning strips are multiple and evenly distributed in a circumferential manner. The cleaning strips and the jet holes are arranged in a staggered manner. Embodiment 2

[0067] The same parts of Embodiment 2 and Embodiment 1 will not be repeated. The differences are as follows;

[0068] The diversion holes of the power housing 8 are arranged in a spiral shape, and the spiral direction of the diversion holes is opposite to the rotation direction of the cleaning housing 1. The sum of the areas of the connection parts of all the diversion holes with the front end face of the power housing 8 is less than one-half of the area of the opening of the rear end face of the power housing 8.

[0069] When the inner wall of a certain section of the petroleum pipeline is severely scaled, after the petroleum in this section of the petroleum pipeline is emptied, the cleaning device in the present invention is inserted from one end of this section of the petroleum pipeline, and then high-pressure air containing fine sand is introduced into the petroleum pipeline from this end. While the high-pressure air pushes the cleaning device forward, it drives the power shaft 9 to rotate through the paddle blades 10. After the high-pressure air flow passes through the diversion holes of the power housing 8, a cyclone flow is formed. Driven by the high speed of the cyclone flow, the fine sand forms an overall cyclone grinding state in the pipeline. The fine sand uses the kinetic energy carried by itself during the cyclone process to grind and break the scale on the pipe wall, achieving the purpose of scale cleaning.

[0070] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An internal cleaning device for an oil pipeline, characterized in that, The cleaning device includes a cleaning component, and the cleaning component includes a cleaning shell (1), a cleaning shaft (2), and a positioning component; The cleaning shell (1) includes a housing (101), a partition (102), a heating pipe (103), and a transmission pipe (104). The housing (101) is a spherical shell with an open front end. A plurality of jet holes are circumferentially and evenly distributed in the middle of the side wall of the housing (101). The partition (102) is annular and vertically arranged at the rear part inside the housing (101). The heating pipe (103) is circular tubular and coaxially arranged at the front part inside the housing (101). The front end of the heating pipe (103) is hermetically connected to the front end of the housing (101). The rear end of the heating pipe (103) is connected to the partition (102) and communicated with the jet holes. An induction heating coil (3) is wound around the outside of the heating pipe (103). The transmission pipe (104) is coaxially arranged at the rear part inside the housing (101). The front and rear ends of the transmission pipe (104) are respectively connected to the partition (102) and the inner wall of the housing (101); The cleaning shaft (2) is axially arranged inside the cleaning shell (1). The front section of the cleaning shaft (2) is located inside the heating pipe (103). The rear section of the cleaning shaft (2) is axially slidably arranged inside the transmission pipe (104). The cleaning shell (1) and the cleaning shaft (2) rotate synchronously and in the same direction. A spring is arranged between the cleaning shell (1) and the cleaning shaft (2), and the spring drives the cleaning shell (1) to slide towards the front end of the cleaning shaft (2); The positioning component includes a positioning block (4) and a positioning rod (5). The positioning block (4) is coaxially and fixedly rotatably arranged at the front end of the cleaning shaft (2). The rear end face of the positioning block (4) is an inclined surface. The positioning block (4) translates along the axial direction of the oil pipeline. The positioning rod (5) is radially arranged inside the heating pipe (103). One end of the positioning rod (5) is fixedly connected to the heating pipe (103), and the other end slidably fits on the rear end inclined surface of the positioning block (4); The cleaning device further includes a power component, and the power component and the cleaning component are hinged to each other; The power component includes a power shell (8) and a power shaft (9). The power shell (8) is in the shape of a shell with an open rear end. A plurality of diversion holes are axially arranged at the front part of the power shell (8). The power shaft (9) is fixedly rotatably arranged inside the power shell (8). A plurality of blades (10) are circumferentially and evenly distributed on a section of the power shaft (9) located inside the power shell (8). The front end of the power shaft (9) extends out of the power shell (8) and is drivingly connected to the rear end of the cleaning shaft (2); The cleaning device further includes a power generation component. The power generation component is located between the power component and the cleaning component. The front and rear ends of the power generation component are respectively hinged to the cleaning component and the power component, The power generation assembly comprises a power generation shell (11), a power generation shaft (12) and a generator (13); the power generation shell (11) is in the shape of a sealed shell; the power generation shaft (12) is fixedly rotatably arranged in the power generation shell (11); both ends of the power generation shaft (12) extend out of the power generation shell (11); the front and rear ends of the power generation shaft (12) are respectively connected to the rear end of the cleaning shaft (2) and the front end of the power shaft (9); and the generator (13) is fixedly arranged in the power generation shell (11) and is transmission-connected to a section of the power generation shaft (12) located in the power generation shell (11).

2. The internal cleaning device for an oil pipeline according to claim 1, wherein, A linkage rod (6) is fixedly arranged along the rear edge of the cleaning shaft (2); the linkage rod (6) is arranged parallel to and spaced from the cleaning shaft (2); the rear end of the linkage rod (6) is fixedly connected to the cleaning shaft (2) and the front end is slidably sleeved on the partition plate (102).

3. The internal cleaning device for an oil pipeline according to claim 2, characterized in that, The spring is located in the transmission tube (104) and the slideway is sleeved on the cleaning shaft (2). The front and rear ends of the spring respectively abut against the partition plate (102) and the rear of the cleaning shaft (2).

4. An internal cleaning device for an oil pipeline according to claim 1, characterized in that, A plurality of support rods (7) are evenly distributed on the circumference of the front end of the positioning block (4); one end of the support rod (7) is hinged to the positioning block (4) via a torsion spring, and the other end abuts against the inner wall of the oil pipeline; the support rod (7) enables the positioning block (4) to translate along the axial direction of the oil pipeline.

5. An internal cleaning device for an oil pipeline according to claim 1, characterized in that, A connecting shaft (14) is provided between the power generation component and the power component and between the power generation component and the cleaning component; Both ends of the connecting shaft (14) are spherical, the longitudinal sections of the front end of the power shaft (9), the front and rear ends of the power shaft (12) and the rear end of the cleaning shaft (2) are all C-shaped, and the spherical end of the connecting shaft (14) is rotatably engaged with the end of the power shaft (9), the power shaft (12) or the cleaning shaft (2); The spherical end surface of the connecting shaft (14) is provided with a first groove along the length direction of the connecting shaft (14), and the first grooves are arranged in a plurality in a circumferential array. A second groove is provided on the inner side of the end of the power shaft (9), the power generation shaft (12) or the cleaning shaft (2), and the number of the second grooves is equal to that of the first grooves and they are arranged in a one-to-one correspondence. The cross-sections of the first groove and the second groove form a circle. A ball is embedded between the first groove and the second groove, and the ball is located in the first groove and in the second groove.

6. The internal cleaning device for an oil pipeline according to claim 1, wherein The power shell (8) is hemispherical, and the power generation shell (11) is spherical.

7. An internal cleaning device for an oil pipeline according to claim 1, characterized in that, A cleaning strip is arranged on the outer circumferential side of the cleaning shell (1) along the length direction of the cleaning shaft (2), wherein a plurality of the cleaning strips are evenly distributed around the circumference, and the cleaning strips and the spray holes are arranged in an alternating manner.

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