An energy-saving anti-corrosion processing device for oil pipelines

Abstract

This application relates to the technical field of petroleum pipeline processing, and discloses an energy-saving anti-corrosion processing device for petroleum pipelines, including a base. A clamping device is arranged above the base and is used for clamping and fixing the petroleum pipeline. The bottom of the base is sleeved and slidably connected to the bottom of a support frame, and a linear displacement mechanism is arranged between the support frame and the base. The bottom of the support frame is driven by the linear displacement mechanism to move horizontally along the bottom of the base. A cross beam is fixedly connected to the top of the support frame, and the central axis of the cross beam coincides with the central axis of the clamped and fixed petroleum pipeline. A heating seat is fixedly connected to one end of the cross beam facing the petroleum pipeline, and a spraying device is rotatably connected to the end face of the heating seat. Through the setting of the air duct and the spraying device, by matching the power of the drying air flow with the power of the spraying coating, the rotation of the spraying device is driven. On the one hand, uniform spraying of the spraying device is realized, and on the other hand, the effective utilization of energy is achieved, reducing energy loss.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum pipeline processing, and particularly to an energy-saving anti-corrosion processing device for petroleum pipelines. Background Art

[0002] In the field of petroleum transportation, petroleum pipelines, as key transportation carriers, their safe and stable operation is of crucial importance. Since petroleum often contains various corrosive substances, and the pipelines are in a complex environment for a long time, such as being eroded by media such as soil, water, and air, the pipelines are extremely prone to corrosion. Pipeline corrosion not only reduces the service life of the pipelines, increases the maintenance cost, but may also cause leakage accidents in severe cases, resulting in environmental pollution and huge economic losses.

[0003] Traditional petroleum pipeline anti-corrosion processing devices have many drawbacks in practical applications. In the spraying link, most spraying devices rely on single electric drive, consuming a large amount of energy, and it is difficult to ensure uniform spraying of the coating on the inner wall of the pipeline, and the coating thickness is uneven, affecting the anti-corrosion effect. In the grinding process of pre-treating the pipeline, existing grinding devices often cannot effectively remove rust, oxides, and impurities on the inner wall of the pipeline, resulting in insufficient adhesion between the subsequent coating and the substrate, and then problems such as coating blistering, hollowing, peeling, and even falling off occur. In addition, traditional devices also have defects in the coordinated operation of each process. Each process is relatively independent, and energy and resources are not fully utilized, and the overall processing efficiency is low. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an energy-saving anti-corrosion processing device for petroleum pipelines, which solves the problems of many drawbacks existing in traditional petroleum pipeline anti-corrosion processing devices in practical applications.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An energy-saving anti-corrosion processing device for petroleum pipelines, including a base. A clamping device is arranged above the base for clamping and fixing the petroleum pipeline. The bottom of the base is sleeved and slidably connected to the bottom of a support frame, and a linear displacement mechanism is arranged between the support frame and the base to drive the bottom of the support frame to move horizontally along the bottom of the base through the linear displacement mechanism. A cross beam is fixedly connected to the top of the support frame, and the central axis of the cross beam coincides with the central axis of the clamped and fixed petroleum pipeline. A heating seat is fixedly connected to one end of the cross beam facing the petroleum pipeline. A spraying device is rotatably connected to the end face of the heating seat. A grinding device is rotatably connected to one side of the spraying device. An air duct is arranged in the heating seat for filling with air flow to drive the spraying device to rotate and output hot air flow to dry the inner pipe wall after spraying. A coating pipe is also arranged at the center of the air duct. The coating pipe penetrates into the spraying device, and the coating is input into the spraying device under high pressure through the coating pipe and drives the spraying device to rotate.

[0006] Preferably, the clamping device includes a V-shaped groove and a limiting flange. The V-shaped groove is formed on the surface of the base and is used to place and support the pipe body of the oil pipeline. The limiting flange is fixedly connected to one side of the base, and the limiting flange is fixedly connected to the fixed flange of the oil pipeline through bolts.

[0007] Preferably, the linear displacement mechanism includes a lead screw. The two ends of the lead screw are respectively rotatably connected to the inner walls on both sides of the base. A slider is sleeved and threadedly connected to the threaded end of the lead screw. The upper part of the slider is embedded and slidably connected inside the base, and the bottom wall of the slider is fixedly connected to the upper wall of the bottom of the support frame. One end of the lead screw close to the limiting flange is fixedly connected to the output end of the first motor, and the outer wall of the first motor is fixedly connected to the outer side wall of the base.

[0008] Preferably, the air duct includes a first air duct, a second air duct and a third air duct. The first air duct is horizontally formed in the center of the heating seat, one end is communicated with the high-pressure air pipe, and the other end is communicated with the second air duct. The second air duct is of a disc-shaped structure and is formed on the side of the heating seat close to the spraying device. The third air duct is of an annular structure and is formed on the inner side of the outer circumference of the heating seat and is communicated with the second air duct. A gas blocking baffle and a heater are arranged in the third air duct.

[0009] Preferably, the spraying device includes a runner. One end of the runner is fixedly connected with a first centrifugal impeller, and this end of the runner is embedded in the heating seat and rotatably connected therewith. The other end is fixedly connected with a spraying cylinder. The first centrifugal impeller is located in the center of the second air duct. The paint pipe sequentially penetrates through the center of the first centrifugal impeller and the center of the runner and is communicated with the inside of the spraying cylinder. The outer wall of the paint pipe is rotatably connected with the first centrifugal impeller, the runner and the spraying cylinder respectively. A plurality of scraping plates are evenly distributed on the outer circumferential wall of the runner. The outer circumferential diameter of the outer edges of the plurality of scraping plates is equal to the outer diameter of the heating seat, and the difference between the outer diameter of the heating seat and the inner diameter of the oil pipeline is the coating thickness. When the air flow enters the air duct, the air flow impacts the first centrifugal impeller and drives the first centrifugal impeller to rotate. At the same time, the air flow enters the third air duct from the second air duct and is discharged after deceleration and heating.

[0010] Preferably, a paint flow channel communicated with the discharge port of the paint pipe is formed in the spraying cylinder. A second centrifugal impeller is fixedly connected to the center of the paint flow channel, and the second centrifugal impeller is opposite to the discharge port of the paint pipe. A plurality of nozzles are evenly distributed on the outer circumferential wall of the spraying cylinder. The nozzles are communicated with the paint flow channel. When the paint pipe outputs paint, the paint impacts the second centrifugal impeller and drives the second centrifugal impeller to rotate. Finally, the paint is sprayed out from the nozzles.

[0011] Preferably, the grinding device includes a base. One side of the base is rotatably connected to the outer side wall of the spraying cylinder, and the other side is rotatably connected to a grinding head. A second motor is embedded and fixedly connected in the base, and the output end of the second motor is fixedly connected to the center of the grinding head.

[0012] Preferably, an elastic ring is fixedly connected to the outer circular wall of the base. The space where the grinding head is located is isolated from the space where the spraying cylinder is located through the elastic ring, and when the elastic ring is along the inner pipe wall of the oil pipeline.

[0013] Preferably, a blowing air duct is opened on one side of the base close to the grinding head. A centrifugal impeller III is arranged in the blowing air duct. The center of the centrifugal impeller III is sleeved and fixedly connected to the outer wall of the output end of the second motor. When the second motor drives the centrifugal impeller III to rotate, air flow is blown from the second motor through the centrifugal impeller III to the grinding head.

[0014] The present invention provides an energy-saving anti-corrosion processing device for oil pipelines. It has the following beneficial effects:

[0015] Through the setting of the air duct and the spraying device in the present invention, by cooperating the power of the drying air flow with the power of the spraying paint, the rotation of the spraying device is driven. On the one hand, uniform spraying of the spraying device is realized, and on the other hand, effective utilization of energy is achieved, reducing energy loss. At the same time, after the kinetic energy of the air flow is lost when driving the rotation of the spraying device, and further blocked by the air-blocking baffle, the air flow velocity is greatly reduced. The low-speed flowing air flow is heated by the heater and then slowly blown to the inner wall of the oil pipeline after spraying, which not only accelerates the forming process of the anti-corrosion paint, but also avoids the influence of the air flow impact force on the adhesion state of the paint. The rotation of the runner drives the rotation of the scraper, so that the dripping paint is lifted and utilized again, which not only realizes the operation of the scraper to even the paint on the inner wall of the sprayed pipeline, but also avoids the problem of paint waste.

[0016] Through the cooperation of the blowing air duct in the base and the centrifugal impeller III, on the one hand, the blowing of impurities after grinding is realized, and on the other hand, the heat dissipation effect of the second motor and the grinding head is improved, ensuring the stable operation of the grinding device. Brief Description of the Drawings

[0017] Figure 1 is a perspective view of an energy-saving anti-corrosion processing device for oil pipelines of the present invention;

[0018] Figure 2 is a structural schematic diagram of the linear displacement mechanism in the present invention;

[0019] Figure 3 is a front view of the spraying device in the present invention;

[0020] Figure 4 is a perspective view of the spraying device in the present invention;

[0021] Figure 5 is a perspective view of the heating base in the present invention;

[0022] Figure 6 is a structural schematic diagram of the spraying device in the present invention;

[0023] Figure 7 is Figure 6 The enlarged view of part A in

[0024] Among them, 1, base; 2, support frame; 3, cross beam; 4, heating seat; 5, spraying device; 501, runner; 502, first centrifugal impeller; 503, spraying cylinder; 5031, paint flow channel; 504, scraper; 505, second centrifugal impeller; 506, nozzle; 6, grinding device; 601, base; 6011, air blowing air duct; 602, grinding head; 603, second motor; 604, elastic ring; 605, third centrifugal impeller; 7, air duct; 701, first air duct; 702, second air duct; 703, third air duct; 704, air blocking baffle; 705, heater; 8, paint pipe; 9, V-shaped groove; 10, limit flange; 11, lead screw; 12, slider; 13, first motor; 14, high-pressure air pipe. Specific embodiments

[0025] 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 present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all 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.

[0026] Please refer to the attached Figure 1 - attached Figure 6 , the embodiments of the present invention provide an energy-saving anti-corrosion processing device for oil pipelines, including as Figure 1 shown, the energy-saving anti-corrosion processing device of this embodiment includes a base 1, a clamping device is arranged above the base 1 for clamping and fixing the oil pipeline. The bottom of the base 1 is sleeved and slidably connected to the bottom of the support frame 2, and a linear displacement mechanism is arranged between the support frame 2 and the base 1. The bottom of the support frame 2 is driven to move horizontally along the bottom of the base 1 through the linear displacement mechanism. The top of the support frame 2 is fixedly connected with a cross beam 3. The central axis of the cross beam 3 coincides with the central axis of the clamped and fixed oil pipeline. One end of the cross beam 3 facing the oil pipeline is fixedly connected with a heating seat 4. The end face of the heating seat 4 is rotatably connected with a spraying device 5. One side of the spraying device 5 is rotatably connected with a grinding device 6. An air duct 7 is arranged in the heating seat 4 for filling air flow to drive the spraying device 5 to rotate and output hot air flow to dry the inner pipe wall after spraying. A paint pipe 8 is also arranged at the center of the air duct 7. The paint pipe 8 penetrates into the spraying device 5. The paint is input into the spraying device 5 under high pressure through the paint pipe 8 and drives the spraying device 5 to rotate.

[0027] Through the arrangement of the air duct 7 and the spraying device 5, by coordinating the drying air flow power with the power of the spraying coating, the rotation of the spraying device 5 is driven. On the one hand, the uniform spraying effect of the spraying device 5 is achieved, and on the other hand, the effective utilization of energy is realized, reducing energy loss.

[0028] The clamping device includes a V-shaped groove 9 and a limit flange 10. The V-shaped groove 9 is opened on the surface of the base 1 and is used to place and support the pipe body of the oil pipeline. The limit flange 10 is fixedly connected to one side of the base 1, and the limit flange 10 is fixedly connected to the fixed flange of the oil pipeline through bolts.

[0029] When processing, the oil pipeline is placed in the V-shaped groove 9. At this time, under the action of the V-shaped groove 9, the oil pipeline is automatically centered. Then, the oil pipeline is moved so that its fixed flange is connected to the limit flange 10, thus realizing the clamping and fixing of the oil pipeline. Between the fixed flange and the limit flange 10, traditional bolt fixation can be selected, or the method of using quick connectors can be selected for fixation.

[0030] The linear displacement mechanism includes a lead screw 11. The two ends of the lead screw 11 are respectively rotatably connected to the inner walls on both sides of the base 1. A slider 12 is sleeved and threadedly connected to the threaded end of the lead screw 11. The upper part of the slider 12 is embedded and slidably connected inside the base 1, and the bottom wall of the slider 12 is fixedly connected to the upper wall of the bottom of the support frame 2. One end of the lead screw 11 close to the limit flange 10 is fixedly connected to the output end of the first motor 13, and the outer wall of the first motor 13 is fixedly connected to the outer wall of the base 1.

[0031] During the processing, the first motor 13 drives the lead screw 11 to rotate, thereby enabling the slider 12 to drive the support frame 2 to slide along the bottom of the base 1, thus realizing the purpose of moving the spraying device, grinding device, etc. inside the oil pipeline. Auxiliary parts such as rollers can be installed at the bottom of the support frame 2 to improve the smoothness of the movement of the support frame 2.

[0032] The air channel 7 includes air channel 1 701, air channel 2 702 and air channel 3 703. Air channel 1 701 is horizontally opened in the center of the heating seat 4, one end is connected to the high-pressure air pipe 14, and the other end is connected to air channel 2 702. Air channel 2 702 is a disc-shaped structure, which is opened on the side of the heating seat 4 close to the spray device 5. Air channel 3 703 is a circular ring structure, which is opened on the inner side of the outer circumference of the heating seat 4 and is connected to air channel 2 702. Air channel 3 703 is provided with an air blocking baffle 704 and a heater 705. The spraying device 5 includes a rotating wheel 501, one end of which is fixedly connected to a centrifugal impeller 502, and the rotating wheel 501 is embedded in the heating seat 4 and rotatably connected to each other, and the other end is fixedly connected to a spray barrel 503, the centrifugal impeller 502 is located at the center of the airway 2 702, and the paint tube 8 passes through the center of the centrifugal impeller 502 and the center of the rotating wheel 501 in sequence, and is connected to the inside of the spray barrel 503, and the outer wall of the paint tube 8 is respectively connected to the centrifugal impeller 502 and the rotating wheel 501. The wheel 501 and the spray barrel 503 are rotatably connected, and a plurality of scrapers 504 are evenly distributed on the outer circumferential wall of the rotating wheel 501. The outer circumferential diameter of the outer edge of the plurality of scrapers 504 is equal to the outer diameter of the heating seat 4, and the difference between the outer diameter of the heating seat 4 and the inner diameter of the oil pipeline is the coating thickness. When the airflow enters the airway 7, the airflow impacts the centrifugal impeller 1 502, driving the centrifugal impeller 1 502 to rotate. At the same time, the airflow enters the airway 2 702 into the airway 3 703, and is discharged after being decelerated and heated.

[0033] The air channel 7 is connected to the high-pressure gas output device through the high-pressure air pipe 14. When the high-speed airflow enters the air channel 1 701 from the high-pressure air pipe 14, it impacts the centrifugal impeller 1 502, drives the centrifugal impeller 1 502 to rotate, and then drives the spray device 5 to rotate. At this time, the high-speed airflow loses part of its kinetic energy, the flow rate decreases, and moves with the centrifugal blades, enters the air channel 3 703 from the air channel 2 702, and loses part of its kinetic energy again after being blocked by the air blocking baffle 704, the flow rate is further reduced, and is heated by the heater 705 during the flow process. The hot airflow then flows out of the air channel 3 703 and rushes to the side wall on the other side of the heating seat 4. After the collision, the kinetic energy is reduced again, and it contacts the coating on the inner wall of the oil pipeline to dry it. That is, the molding process of the anti-corrosion coating is accelerated, and the influence of the airflow impact force on the coating adhesion state is avoided.

[0034] A paint flow channel 5031 connected to the discharge port of the paint tube 8 is provided in the spray barrel 503. A centrifugal impeller 505 is fixedly connected to the center of the paint flow channel 5031, and the centrifugal impeller 505 is directly opposite to the discharge port of the paint tube 8. A plurality of nozzles 506 are evenly distributed on the outer circular wall of the spray barrel 503. The nozzles 506 are connected to the paint flow channel 5031. When the paint is output from the paint tube 8, the paint impacts the centrifugal impeller 505, driving the centrifugal impeller 505 to rotate, and the paint is finally sprayed out from the nozzle 506.

[0035] The coating is output from the spraying device, enters the coating flow channel 5031 inside the spraying cylinder 503 through the coating pipe 8. The coating flowing at high speed and high pressure impacts the second centrifugal impeller 505, driving the second centrifugal impeller 505 to rotate, thereby driving the spraying device 5 to rotate. Finally, the coating flows along the blades of the second centrifugal impeller 505 and is sprayed out from the nozzle 506 with a certain pressure. The nozzle 506 rotates along with the spraying cylinder 503, improving the spraying uniformity.

[0036] It should be noted that the rotation of the spraying device 5 is achieved under the combined action of the air flow impact and the coating impact. Through the mutual cooperation of the two, the power to drive the spraying device 5 to rotate is achieved.

[0037] At the same time, the rotation of the runner 501 drives the rotation of the scraper 504, so that the coating dripping under the action of gravity is lifted and utilized again. It not only realizes the operation of the scraper 504 to even out the coating on the inner wall of the pipeline after spraying, but also avoids the problem of coating waste.

[0038] The grinding device 6 includes a base 601. One side of the base 601 is rotatably connected to the outer side wall of the spraying cylinder 503, and the other side is rotatably connected with a grinding head 602. A second motor 603 is embedded and fixedly connected inside the base 601, and the output end of the second motor 603 is fixedly connected to the center of the grinding head 602. A blowing air duct 6011 is provided on one side of the base 601 close to the grinding head 602. A third centrifugal impeller 605 is arranged in the blowing air duct 6011. The center of the third centrifugal impeller 605 is sleeved and fixedly connected to the outer wall of the output end of the second motor 603. When the second motor 603 drives the third centrifugal impeller 605 to rotate, the air flow is blown from the second motor 603 to the grinding head 602 through the third centrifugal impeller 605.

[0039] The grinding head 602 is driven by the second motor 603 to rotate to grind the inner wall of the oil pipeline, eliminating rust, oxides, impurities, etc. on the inner wall of the pipeline, ensuring good adhesion between the coating and the substrate and the quality of the coating, thereby improving the bonding force between the coating and the substrate, reducing problems such as coating blistering, hollowing, peeling, and falling off, and extending the service life of the coating.

[0040] At the same time, when the second motor 603 drives the grinding head 602 to rotate, it synchronously drives the third centrifugal impeller 605 to rotate. The high-speed rotating third centrifugal impeller 605 generates suction to absorb the air passing through the second motor 603 and outputs the air flow from the blowing air duct 6011 to purge the grinding head 602. On the one hand, it realizes the purging of impurities after grinding, and on the other hand, it improves the heat dissipation effect of the second motor 603 and the grinding head 602, ensuring the stable operation of the grinding device 6.

[0041] An elastic ring 604 is fixedly connected to the outer circular wall of the base 601. The space where the grinding head 602 is located is isolated from the space where the spraying cylinder 503 is located through the elastic ring 604, and when the elastic ring 604 is along the inner pipe wall of the oil pipeline.

[0042] The function of the elastic ring 604 is to isolate the space where the grinding head 602 is located from the space where the spraying cylinder 503 is located, and further scrape the impurities on the inner wall of the oil pipeline after grinding, thereby avoiding the influence of the impurities generated by grinding on the subsequent spraying.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving petroleum pipeline anti-corrosion processing device, comprising a base (1), characterized in that: A clamping device is arranged above the base (1) for clamping and fixing the oil pipeline. The bottom of the base (1) is sleeved and slidably connected to the bottom of the support frame (2), and a linear displacement mechanism is arranged between the support frame (2) and the base (1). The linear displacement mechanism drives the bottom of the support frame (2) to move horizontally along the bottom of the base (1). A crossbeam (3) is fixedly connected to the top of the support frame (2). The central axis of the crossbeam (3) coincides with the central axis of the oil pipeline to be clamped and fixed. The crossbeam (3) is fixedly connected to one end of the oil pipeline. A heating seat (4), wherein the end surface of the heating seat (4) is rotatably connected to a spraying device (5), and one side of the spraying device (5) is rotatably connected to a grinding device (6). An air channel (7) is provided in the heating seat (4) for injecting air into the spraying device (5) to drive the spraying device (5) to rotate, and outputting hot air flow to dry the inner tube wall after spraying. A paint pipe (8) is also provided in the center of the air channel (7), and the paint pipe (8) penetrates into the spraying device (5). The paint is input into the spraying device (5) at high pressure through the paint pipe (8), and drives the spraying device (5) to rotate; The air channel (7) comprises air channel one (701), air channel two (702) and air channel three (703); the air channel one (701) is horizontally opened at the center of the heating seat (4), one end of which is connected to the high-pressure air pipe (14), and the other end of which is connected to the air channel two (702); the air channel two (702) is a disc-shaped structure, which is opened on the side of the heating seat (4) close to the spraying device (5); the air channel three (703) is a circular ring structure, which is opened on the inner side of the outer circumference of the heating seat (4) and is connected to the air channel two (702); and the air channel three (703) is provided with an air blocking baffle (704) and a heater (705); The spraying device (5) comprises a rotating wheel (501), one end of which is fixedly connected to a centrifugal impeller (502), and this end of the rotating wheel (501) is embedded in a heating seat (4) and is rotatably connected to each other, and the other end is fixedly connected to a spraying barrel (503), and the centrifugal impeller (502) is located at the center of the airway (702).

2. The energy-saving petroleum pipeline anti-corrosion processing device according to claim 1 is characterized in that: The clamping device comprises a V-shaped groove (9) and a limiting flange (10). The V-shaped groove (9) is provided on the surface of the base (1) and is used to place and support the pipe body of the oil pipeline. The limiting flange (10) is fixedly connected to one side of the base (1). The limiting flange (10) is fixedly connected to the fixed flange of the oil pipeline by bolts.

3. The energy-saving petroleum pipeline anti-corrosion processing device according to claim 2 is characterized in that: The linear displacement mechanism comprises a screw rod (11), the two ends of the screw rod (11) are respectively rotatably connected to the inner walls on both sides of the base (1), the threaded end of the screw rod (11) is sleeved and threadedly connected with a slider (12), the upper part of the slider (12) is embedded and slidably connected inside the base (1), and the bottom wall of the slider (12) is fixedly connected to the bottom upper wall of the support frame (2), the end of the screw rod (11) close to the limit flange (10) is fixedly connected to the output end of the motor one (13), and the outer wall of the motor one (13) is fixedly connected to the outer wall of the base (1).

4. The energy-saving petroleum pipeline anti-corrosion processing device according to claim 1 is characterized in that: The coating tube (8) sequentially passes through the center of the centrifugal impeller 1 (502) and the center of the rotating wheel (501), and is connected to the inside of the spray barrel (503). The outer wall of the coating tube (8) is rotatably connected to the centrifugal impeller 1 (502), the rotating wheel (501), and the spray barrel (503). A plurality of scrapers (504) are evenly distributed on the outer circular wall of the rotating wheel (501). The outer circumferential diameter of the outer edge of the plurality of scrapers (504) is equal to the outer diameter of the heating seat (4), and the difference between the outer diameter of the heating seat (4) and the inner diameter of the oil pipeline is the coating thickness. When the airflow enters the airway (7), the airflow impacts the centrifugal impeller 1 (502), driving the centrifugal impeller 1 (502) to rotate. At the same time, the airflow enters the airway 2 (702) into the airway 3 (703), and is discharged after being decelerated and heated.

5. The energy-saving petroleum pipeline anti-corrosion processing device according to claim 4 is characterized in that: The spray barrel (503) is provided with a paint flow channel (5031) connected to the discharge port of the paint tube (8); a second centrifugal impeller (505) is fixedly connected to the center of the paint flow channel (5031), and the second centrifugal impeller (505) is directly opposite to the discharge port of the paint tube (8); a plurality of nozzles (506) are evenly distributed on the outer circular wall of the spray barrel (503); the nozzles (506) are connected to the paint flow channel (5031); when the paint tube (8) outputs the paint, the paint impacts the second centrifugal impeller (505), driving the second centrifugal impeller (505) to rotate, and the paint is finally sprayed out from the nozzle (506).

6. The energy-saving petroleum pipeline anti-corrosion processing device according to claim 1 is characterized in that: The grinding device (6) comprises a base (601), one side of the base (601) is rotatably connected to the outer wall of the spray barrel (503), and the other side is rotatably connected to a grinding head (602), a second motor (603) is embedded in and fixedly connected to the base (601), and the output end of the second motor (603) is fixedly connected to the center of the grinding head (602).

7. The energy-saving petroleum pipeline anti-corrosion processing device according to claim 6 is characterized in that: The outer circular wall of the base (601) is fixedly connected with an elastic ring (604), and the elastic ring (604) isolates the space where the grinding head (602) is located from the space where the spray barrel (503) is located, so as to scrape away impurities from the inner wall of the oil pipeline after grinding.

8. The energy-saving petroleum pipeline anti-corrosion processing device according to claim 6 is characterized in that: The base (601) is provided with an air blowing duct (6011) on one side close to the grinding head (602), and a centrifugal impeller (605) is arranged in the air blowing duct (6011). The center of the centrifugal impeller (605) is sleeved and fixedly connected to the outer wall of the output end of the motor (603). When the motor (603) drives the centrifugal impeller (605) to rotate, air flows from the motor (603) through the centrifugal impeller (605) and blows toward the grinding head (602).

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