Automatic cleaning device for oil dirt on oil pipe

Abstract

The invention provides an automatic oil pipe oil dirt cleaning device which comprises an electromagnetic heating device, a cleaning station and a tail end supporting device which are linearly arranged, an outward extending shaft is arranged on the side, close to the cleaning station, of the tail end supporting device, the end of the outward extending shaft is arranged at the cleaning station, the cleaning station is provided with a cleaning box, an inner cavity is formed in the cleaning box, and the inner cavity is communicated with the electromagnetic heating device. Channel holes are formed in the two ends of the inner cavity, an outer cleaning device and an inner cleaning device are arranged in the inner cavity, the end of the outward-extending shaft is connected with the inner cleaning device, the inner cleaning device is provided with inner nozzles arranged in the circumferential direction, the outer cleaning device is provided with outer nozzles arranged in the circumferential direction, and the oil pipe penetrates through the electromagnetic heating device and the channel holes and is arranged on the outer side of the outward-extending shaft in a sleeving mode. The inner cleaning device and the outer cleaning device are used for cleaning the inner wall and the outer wall of the oil pipe respectively, a plurality of jacking traction units which are linearly arranged at intervals are further arranged below the oil pipe, each jacking traction unit comprises a liftable traction wheel, the traction wheels abut against the lower end of the oil pipe to roll, and oil dirt in the oil pipe is difficult to clean.

Description

Technical Field

[0001] The invention relates to the field of oil drill pipe cleaning, in particular to an automatic cleaning device for oil stains on oil pipes. Background Art

[0002] Currently, there's a trend toward intelligent and automated oil production processes, equipment maintenance, and transportation. Many oil fields have reached the mid-to-late stages of development, particularly with the transition from water flooding to polymer flooding. Waxing and scaling are becoming increasingly serious issues in oil wells. Scaling in pipelines narrows flow channels, increases pressure loss, reduces pipeline efficiency, and can even lead to safety hazards like pipeline blockage and pump jams.

[0003] Oil pipe cleaning is a crucial step in well repair operations. The quality and efficiency of cleaning operations are crucial for the smooth implementation of subsequent flaw detection and repair work. This plays a crucial role in ensuring safe oil well production and improving economic efficiency. However, oil pipe fouling is complex and diverse, including substances such as oil, scale, crystallized salts, and crystallized wax, each of which has varying degrees of adsorption. Currently, the most widely used oil pipe cleaning method in oil fields uses a single cleaning parameter, making it difficult to completely remove all fouling. Summary of the Invention

[0004] The present invention provides an automatic cleaning device for oil pipe grease, which solves the problem that oil pipe grease is difficult to clean.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic cleaning device for oil stains on oil pipes, comprising an electromagnetic heating device, a cleaning station and an end support device arranged in a straight line, an outward extension shaft is provided on the side of the end support device close to the cleaning station, the end of the outward extension shaft is provided at the cleaning station, the cleaning station is provided with a cleaning box, an inner chamber is provided in the cleaning box, channel holes are provided at both ends of the inner chamber, an external cleaning device and an internal cleaning device are provided in the inner chamber, the end of the outward extension shaft is connected to the inner cleaning device, the inner cleaning device is provided with an inner nozzle arranged circumferentially, and the outer cleaning device is provided with an outer nozzle arranged circumferentially, the oil pipe passes through the electromagnetic heating device and the channel hole and is sleeved on the outside of the outward extension shaft, the inner cleaning device and the outer cleaning device clean the inner wall and outer wall of the oil pipe respectively, and a plurality of lifting and traction units arranged in a straight line at intervals are also provided under the oil pipe, the lifting and traction unit includes a liftable traction wheel, and the traction wheel rolls against the lower end of the oil pipe.

[0006] In the preferred solution, an inner baffle device is further provided on the extended shaft near the inner cleaning device, and the inner baffle device includes a plurality of inner scrapers arranged along the circumferential direction, and the outer sides of the inner scrapers rest against the inner wall of the oil pipe. An outer scraper device is also provided at the cleaning station, and the outer scraper device includes a plurality of outer scrapers arranged along the circumferential direction, and the outer scrapers rest against the outer wall of the oil pipe.

[0007] In the preferred solution, the inner scrapers are arranged overlappingly in the circumferential direction, a collar is provided on the outside of the extended shaft, a plurality of guide blocks are provided on the collar along the circumference, a slidable scraper sleeve is provided on the guide block, the scraper sleeve is connected to the side end of the inner scraper away from the inner cleaning device, a groove structure is provided at the end of the guide block, a spring is provided in the groove structure, the end of the spring rests on the scraper sleeve, a hollow groove is provided on the guide block, a cross pin is provided on the side wall of the scraper sleeve, and the cross pin is stuck in the hollow groove.

[0008] In the preferred embodiment, a connecting segment is provided at the end of the extended shaft, and the internal cleaning device is rotatably connected to the connecting segment. The internal cleaning device includes a connecting pipe portion and a nozzle head portion. The connecting pipe portion is connected to the connecting segment. The nozzle head portion is provided with multiple radial extension pipes along the circumferential direction. The inner nozzle is arranged at the end of the radial extension pipe. The injection axis of the inner nozzle is arranged in a different plane from the rotating axis of the internal cleaning device. The injection recoil force of the inner nozzle drives the internal cleaning device to rotate.

[0009] In the preferred embodiment, the inner nozzle is inclined toward the side of the inner cleaning device close to the connecting segment, the outward extending shaft includes a central tube, the central tube is connected to the connecting segment, a cleaning liquid inlet pipe is provided on the side wall of the central tube close to the end support device, an outer layer tube is provided on the outside of the central tube, a clamping cavity is provided between the outer layer tube and the central tube, a front support sleeve and a rear support sleeve are provided at both ends of the clamping cavity, the front support sleeve is provided with a plurality of drainage holes along the circumferential direction, a sealing ring is provided on the end of the rear support sleeve away from the clamping cavity, the inner wall of the sealing ring is sleeved on the central tube, and a mixed liquid discharge pipe is provided on the side wall of the rear support sleeve.

[0010] In the preferred solution, the internal cleaning device is provided with a support arm at one end close to the connecting segment, and is also provided with a rocker arm. The middle part of the rocker arm is hinged to the support arm, and a rocker ball and a contact piece are respectively provided at both ends of the rocker arm. A magnetic block is provided at the end of the internal cleaning device, and the magnetic block attracts the rocker ball. The internal cleaning device rotates to make the rocker ball separate from the magnetic block, and the rocker arm swings to make the contact piece contact the outer wall of the connecting segment.

[0011] In a preferred solution, the outer nozzle opening faces a side away from the electromagnetic heating device.

[0012] In the preferred solution, a threaded adjustment sleeve is provided on the outside of the connecting pipe, and a connecting ring is also provided on the outside of the adjusting sleeve. The connecting ring can rotate relative to the adjusting sleeve. A scraper rod is also provided, and hinged gas springs are provided at both ends of the scraper rod. Each gas spring is hinged to the connecting ring. A hinged connecting rod is also provided at one end of the scraper rod, and the connecting rod is hinged to the nozzle head.

[0013] In the preferred solution, a convex ring portion is provided on the outer wall of one end of the connecting segment close to the internal cleaning device, ceramic sealing sleeves are sleeved on both sides of the convex ring portion, a sinking groove structure is provided at the port of the connecting pipe portion, the ceramic sealing sleeve is sleeved into the sinking groove structure, and a stop end sleeve is also provided at the port of the connecting pipe portion, which abuts against the ceramic sealing sleeve.

[0014] In a preferred solution, the collar is provided with a plurality of guide bases along the circumference, the guide bases are provided with wheel frames, and rotatable abutting wheels are provided at the ends of the wheel frames, and the abutting wheels abut against the inner wall of the oil pipe and roll.

[0015] The beneficial effects of the present invention are as follows: by means of high-temperature heating to soften part of the grease, and then by means of rapid cooling, the grease is separated from the interface of the pipe wall by means of different thermal expansion coefficients, thereby achieving a good cleaning effect; compared with the traditional handheld high-pressure water gun cleaning, the present invention adopts an automated cleaning method of synchronous cleaning of the inside and outside, which is highly efficient and greatly improved in safety; the external cleaning nozzles are densely arranged, and as the oil pipe is pulled and moved, the outer wall is cleaned in all directions without dead angles, and the internal cleaning mechanism can rotate by means of the jet recoil force, which not only reduces the complexity requirements of its own mechanism, but also can perform spiral flushing on the inner wall of the oil pipe to avoid grease residue; by The scraper rod of the internal cleaning device rotates to break up the oil stains first, and the rear end uses the internal scraper to scrape off the residual oil stains adhered to the inner wall of the oil pipe, and cleans the stubborn oil stains in layers and steps; the end support device adopts a double-layer sandwiched wall tube, with liquid entering the inner tube and liquid exiting the outer tube, and the inner and outer nozzles spray in the feed direction of the oil pipe, guiding the mixed liquid after cleaning away from the electromagnetic heating device and flowing out from the double-layer sandwiched wall tube cavity, while keeping the cleaning liquid on the inside warm and reducing temperature dissipation; a centrifugal speed limiting device is set at the end of the internal cleaning device, which can adjust the friction resistance according to the rotation speed, so that the rotation of the internal cleaning device remains dynamically constant, avoiding high-speed rotation to reduce the cleaning effect, and at the same time reducing wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and examples.

[0017] Figure 1 This is the overall diagram of the cleaning system.

[0018] Figure 2 It is a side view of the cleaning system.

[0019] Figure 3 This is the structural diagram of the cleaning station.

[0020] Figure 4 This is the structural diagram of the jacking and traction unit.

[0021] Figure 5 It is a structural diagram of the inner support device and the inner baffle device.

[0022] Figure 6 It is a cross-sectional view of the inner baffle device.

[0023] Figure 7 Schematic diagram of the outer scraper device.

[0024] Figure 8 It is the structural diagram of the lateral limit mechanism.

[0025] Figure 9 This is a structural diagram of the internal cleaning device.

[0026] Figure 10 It is a cross-sectional view of the internal cleaning device.

[0027] Figure 11 This is a schematic diagram of the cleaning liquid inlet pipe from the internal cleaning device to the rear end.

[0028] Figure 12 This is a schematic diagram of the forward feed cleaning layout.

[0029] Figure 13 This is a schematic diagram of the internal cleaning device spraying in the forward direction.

[0030] Figure 14 It is a schematic diagram of the arrangement of the centrifugal speed limiting mechanism.

[0031] Figure 15 It is a schematic diagram of the double-cavity structure.

[0032] Figure 16 It is a schematic diagram of the front support sleeve end side.

[0033] In the figure: electromagnetic heating device 1; cleaning station 2; cleaning box 201; maintenance door 202; inner chamber 203; upper cover 204; channel hole 205; end support device 3; extended shaft 301; connecting segment 302; convex ring 303; ceramic sealing sleeve 304; outer tube 305; central tube 306; clamping chamber 307; front support sleeve 308; drainage hole 309; rear support sleeve 310; sealing ring 311; support bar 312; inner sleeve 313; outer sleeve 314; lifting and traction unit 4; traction wheel 401; bottom frame 402; guide rail slider mechanism 403; lifting cylinder 404; traction wheel frame 405; bearing seat 406; reduction motor 407; lateral limit mechanism 5; vertical frame 501; lateral movement frame 502; rolling wheel 503; linear jacking cylinder 504; lateral movement Guide rail mechanism 505; oil pipe 6; external cleaning device 7; external nozzle 701; liquid inlet 702; internal cleaning device 8; internal nozzle 801; radial extension tube 802; connecting pipe part 803; nozzle head part 804; scraper rod 805; connecting ring 806; adjusting sleeve 807; connecting rod 808; gas spring 809; stop end sleeve 810; support arm 811; internal baffle device 9; internal scraper 901; scraper sleeve 902; spring 903; cross pin 904; internal support device 10; collar 1001; guide block 1002; guide base 1003; wheel frame 1004; abutting wheel 1005; hollow groove 1006; external scraper device 11; external scraper 1101; cleaning liquid inlet pipe 12; mixed liquid discharge pipe 13; pendulum rod 14; pendulum ball 15; magnetic block 16; contact piece 17. DETAILED DESCRIPTION

[0034] like Figure 1-16In the invention, an automatic cleaning device for oil stains on oil pipes is provided, which includes an electromagnetic heating device 1, a cleaning station 2 and an end support device 3 arranged in a straight line. The end support device 3 is provided with an extension shaft 301 on the side close to the cleaning station 2. The end of the extension shaft 301 is provided at the cleaning station 2. The cleaning station 2 is provided with a cleaning box 201. The cleaning box 201 is provided with an inner chamber 203. Both ends of the inner chamber 203 are provided with channel holes 205. The inner chamber 203 is provided with an outer cleaning device 7 and an inner cleaning device 8. The end of the extension shaft 301 is provided with a cleaning box 201. It is connected to the internal cleaning device 8, which is provided with circumferentially arranged inner nozzles 801, and the external cleaning device 7 is provided with circumferentially arranged outer nozzles 701. The oil pipe 6 passes through the electromagnetic heating device 1 and the channel hole 205 and is sleeved on the outside of the extended shaft 301. The internal cleaning device 8 and the external cleaning device 7 clean the inner wall and outer wall of the oil pipe 6 respectively. A plurality of lifting and traction units 4 are arranged in a straight line at intervals below the oil pipe 6. The lifting and traction unit 4 includes a liftable traction wheel 401, which rolls against the lower end of the oil pipe 6.

[0035] The inner nozzle 801 is a side-mouth nozzle. Due to the large external space, more inner nozzles can be arranged in the circumferential direction, spraying the outer wall of the oil pipe 6 in all directions without dead angles.

[0036] Traction wheel 401 is a V-shaped wheel that can be raised and lifted from the bottom of oil pipe 6. Multiple lifting and traction units 4 are installed on both sides of electromagnetic heating device 1. The rotation of traction wheel 401 causes oil pipe 6 to advance to the right midway, passing through electromagnetic heating device 1. Electromagnetic heating device 1 uses electromagnetic coils to perform segmented high-frequency heating on oil pipe 6, softening some of the oil stains. After heating, oil pipe 6, pulled by lifting and traction units 4, moves toward end support device 3, gradually passing through the hollow area in the center of internal cleaning device 8, and sleeved onto the outside of internal baffle device 9. External nozzle 701 and internal nozzle 801 spray dry ice cleaning fluid onto the outer and inner walls of oil pipe 6, rapidly cooling the heated section of oil pipe 6. Due to the different thermal expansion coefficients of the oil stains and the oil pipe, and the impact force, the oil stains are separated from the oil pipe wall.

[0037] The lifting and traction unit 4 includes a base frame 402 , a liftable traction wheel frame 405 is provided on the base frame 402 , a bearing seat 406 is provided on the traction wheel frame 405 , and a reduction motor 407 is provided on one side of the traction wheel 401 .

[0038] A guide rail slider mechanism 403 and a lifting cylinder 404 are provided on the base frame 402 . The traction wheel frame 405 is slidably connected to the base frame 402 via the guide rail slider mechanism 403 . The lifting cylinder 404 lifts the traction wheel frame 405 .

[0039] Two bearing seats 406 are provided on the traction wheel frame 405 . Both ends of the rotating shaft of the traction wheel frame 405 are sleeved on the bearing seats 406 . The shaft end of the reduction motor 407 is connected to the rotating shaft.

[0040] A transverse limiting mechanism 5 is further provided on both sides of the cleaning station 2 . The transverse limiting mechanism 5 includes a vertical frame 501 . Two transverse frames 502 that can move in opposite directions are provided on the vertical frame 501 . The transverse frames 502 are provided with rotatable rolling wheels 503 .

[0041] The vertical frame 501 is equipped with a transverse beam, on which a transverse guide mechanism 505 is mounted. The lower end of the transverse frame 502 is connected to the transverse guide mechanism 505. The transverse beam is equipped with an X-shaped lifting seat and a linear jacking cylinder 504 to drive the transverse movement of the transverse frame 502. The rolling wheels 503 are V-shaped wheels. The two rolling wheels 503 are centered and clamped to just contact the outer wall of the oil pipe 6 without hindering the movement of the oil pipe 6.

[0042] The linear jacking cylinder 504 and the lifting cylinder 404 can be servo electric cylinders.

[0043] A maintenance door 202 that can slide upward is provided at the lower end of the cleaning box 201 to clean accumulated grease and cleaning liquid. The cleaning box 201 is also provided with an openable upper cover 204.

[0044] The cleaning box 201 confines the liquid sprayed by the external cleaning device 7 within the inner chamber 203, leaving only the channel hole 205 for the oil pipe 6 to pass through, thereby preventing excessive cleaning liquid from splashing near the electromagnetic heating device 1 and reducing the temperature of the heating section of the oil pipe 6.

[0045] In the preferred solution, an inner baffle device 9 is further provided on the extended shaft 301 near the inner cleaning device 8, and the inner baffle device 9 includes a plurality of inner scrapers 901 arranged along the circumferential direction, and the outer side of the inner scraper 901 rests on the inner wall of the oil pipe 6. An outer scraper device 11 is also provided at the cleaning station 2, and the outer scraper device 11 includes a plurality of outer scrapers 1101 arranged along the circumferential direction, and the outer scrapers 1101 rest on the outer wall of the oil pipe 6.

[0046] The outer scraper device 11 adopts a multi-blade structure similar to the aperture of a camera, and the degree of retraction of the outer scraper 1101 can be controlled by a lever.

[0047] In the preferred embodiment, the inner scrapers 901 are arranged overlappingly in the circumferential direction, and a ring 1001 is sleeved on the outside of the extended shaft 301. The ring 1001 is provided with multiple guide blocks 1002 along the circumferential direction. A slidable scraper sleeve 902 is sleeved on the guide block 1002. The scraper sleeve 902 is connected to the side end of the inner scraper 901 away from the inner cleaning device 8. A sinking groove structure is provided at the end of the guide block 1002, and a spring 903 is provided in the sinking groove structure. The end of the spring 903 rests on the scraper sleeve 902. A hollow groove 1006 is provided on the guide block 1002, and a cross pin 904 is provided on the side wall of the scraper sleeve 902, which is inserted into the hollow groove 1006.

[0048] The transverse pin 904 is inserted into the side wall of the scraper sleeve 902 and can slide in the hollow groove 1006. The hollow groove 1006 limits the transverse pin 904 so that the scraper sleeve 902 can be slightly extended and retracted to prevent the scraper sleeve 902 from falling off the guide block 1002.

[0049] Under the action of the holding force of the spring 903, the outer side of the inner scraper 901 rests against the inner wall of the oil pipe 6. The inner scraper 901 can float to avoid rigid contact and damage to the inner wall. It can not only remove the oil stains on the inner wall, but also serve to stop the dry ice cleaning fluid. When the oil pipe 6 moves to the right end, the inner scraper 901 prevents the dry ice cleaning fluid and the grease mixture from passing over the inner baffle device 9 and moving to the right end. When the oil pipe 6 moves to the right to the end point, the dry ice cleaning fluid and the grease mixture are discharged from the left end of the oil pipe 6.

[0050] The inner scraper 901 can be replaced with matching specifications according to the oil pipes 6 of different diameters.

[0051] In the preferred embodiment, a connecting segment 302 is provided at the end of the extended shaft 301, and the internal cleaning device 8 is rotatably connected to the connecting segment 302. The internal cleaning device 8 includes a connecting pipe portion 803 and a nozzle head portion 804. The connecting pipe portion 803 is connected to the connecting segment 302. The nozzle head portion 804 is provided with multiple radial extension tubes 802 along the circumferential direction. The inner nozzle 801 is arranged at the end of the radial extension tube 802. The injection axis of the inner nozzle 801 is arranged in a different plane from the rotating axis of the internal cleaning device 8. The injection recoil force of the inner nozzle 801 drives the internal cleaning device 8 to rotate.

[0052] A cleaning fluid inlet pipe 12 is provided on the sidewall of the connecting segment 302, on the side of the inner baffle assembly 9 facing away from the inner cleaning device 8. Pressurized dry ice cleaning fluid is introduced into the connecting pipe portion 803 through the cleaning fluid inlet pipe 12. As the cleaning fluid is sprayed from the inner nozzle 801 into the interior of the oil pipe 6, the radial extension pipe 802 and the spraying force of the inner nozzle 801 create a rotational torque in the inner cleaning device 8. The greater the pressure, the greater the jet velocity, and the faster the rotation of the inner cleaning device 8. The inner cleaning device 8 rotates to clean the inner wall of the oil pipe 6, avoiding blind spots in the spraying process.

[0053] However, since the cleaning liquid inlet pipe 12 must protrude beyond the extension shaft 301, sufficient length must be reserved for the cleaning liquid inlet pipe 12 to ensure that the oil pipe 6 can be moved to the rightmost end. This design is not compact. Furthermore, when the cleaning liquid is introduced into the cleaning liquid inlet pipe 12, the pressure may cause the middle section of the cleaning liquid inlet pipe 12 to swing, potentially interfering with the supply of the oil pipe 6.

[0054] In the preferred embodiment, the inner nozzle 801 is inclined toward the side of the inner cleaning device 8 close to the connecting segment 302, and the extended shaft 301 includes a central tube 306, which is connected to the connecting segment 302. The central tube 306 is provided with a cleaning liquid inlet pipe 12 on the side wall near the end support device 3, and an outer layer tube 305 is provided on the outside of the central tube 306. A clamping cavity 307 is provided between the outer layer tube 305 and the central tube 306. A front support sleeve 308 and a rear support sleeve 310 are provided at both ends of the clamping cavity 307 respectively. The front support sleeve 308 is provided with a plurality of drainage holes 309 along the circumferential direction, and a sealing ring 311 is provided at the end of the rear support sleeve 310 away from the clamping cavity 307. The inner wall of the sealing ring 311 is sleeved on the central tube 306, and a mixed liquid discharge pipe 13 is provided on the side wall of the rear support sleeve 310.

[0055] The front support sleeve 308 is provided with an inner sleeve body 313 and an outer sleeve body 314 arranged concentrically. A plurality of support bars 312 are provided circumferentially between the inner sleeve body 313 and the outer sleeve body 314 . The support bars 312 divide the space between the inner sleeve body 313 and the outer sleeve body 314 into a plurality of drainage holes 309 .

[0056] The inner baffle device 9 and the inner support device 10 are sleeved on the outer wall of the outer tube 305. Due to the provision of the clamping cavity 307 and the mixed liquid discharge pipe 13, the mixed liquid accumulated after cleaning no longer needs to be discharged from the left end of the oil pipe 6, avoiding excessive resistance to feeding caused by the accumulation of cleaning mixed liquid.

[0057] The dry ice cleaning liquid is pumped through the cleaning liquid inlet pipe 12 into the central tube 306 and then into the connecting pipe section 803 via the connecting segment 302. The inner nozzle 801 sprays the dry ice cleaning liquid at an angle toward the feed direction of the oil pipe 6, preventing the low-temperature cleaning liquid from flowing along the inner wall of the oil pipe 6 toward the electromagnetic heating device 1, which would hinder heating of the oil pipe 6. Furthermore, after flushing away the grease, the dry ice cleaning liquid jet flushes the mixed liquid into the front support sleeve 308 where it accumulates. The mixed liquid discharge pipe 13 is connected to the liquid pump, and the accumulated mixed liquid is pumped into the clamping cavity 307 through the drainage hole 309 and ultimately removed through the mixed liquid discharge pipe 13.

[0058] Central tube 306 is constructed of thermally insulating material. Furthermore, because oil pipe 6 is heated in sections and metal has a low specific heat capacity, the temperature of the returning mixed liquid remains lower than the ambient temperature after being cooled by a large amount of dry ice cleaning fluid. This creates a low-temperature insulation layer on the outside of central tube 306, further preventing the dry ice cleaning fluid within central tube 306 from escaping. Therefore, even with a long central tube 306 and liquid introduction from the far end, significant temperature loss is minimized.

[0059] In the preferred embodiment, a support arm 811 is provided at one end of the internal cleaning device 8 close to the connecting segment 302, and a rocker arm 14 is also provided. The middle part of the rocker arm 14 is hinged to the support arm 811, and a rocker ball 15 and a contact piece 17 are provided at both ends of the rocker arm 14. A magnetic block 16 is provided at the end of the internal cleaning device 8. The magnetic block 16 attracts the rocker ball 15. The internal cleaning device 8 rotates to make the rocker ball 15 separate from the magnetic block 16, and the rocker arm 14 swings to make the contact piece 17 contact the outer wall of the connecting segment 302.

[0060] The end surface of the stopper sleeve 810 is circumferentially provided with multiple support arms 811, each of which is mounted on a rocker arm 14. When the internal cleaning device 8 is stationary, the magnetic block 16 attracts the rocker ball 15, causing the contact piece 17 to separate from the outer wall of the connecting segment 302. When the internal cleaning device 8 reaches a certain speed, the centrifugal force causes the rocker ball 15 to separate from the magnetic block 16, causing the contact piece 17 at the other end of the rocker arm 14 to press against the connecting segment 302, creating friction that inhibits the rotation of the internal cleaning device 8 and reduces its speed.

[0061] In order to avoid frequent rapid acceleration and deceleration of the internal cleaning device 8, the contact piece 17 can be a spring with a certain elasticity. As the speed of the internal cleaning device 8 increases, the contact pressure will gradually increase, which can gradually increase the friction resistance and gradually stabilize the speed of the internal cleaning device 8 at a certain value. This prevents the internal cleaning device 8 from rotating too fast, which may affect the spray cleaning effect.

[0062] Contact piece 17 adopts bayonet pin to be fixed on pendulum rod 14 ends, easily replaces after wearing. Can spray wear-resistant coating or put on a wear-resistant ring at the junction section 302 outer wall and contact piece 17 release zone.

[0063] In a preferred solution, the nozzle of the outer nozzle 701 faces the side away from the electromagnetic heating device 1 .

[0064] The external cleaning device 7 is provided with an annular main body with a liquid inlet 702, on which an external nozzle 701 is provided. The jet ejected by the external nozzle 701 is directed away from the side of the electromagnetic heating device 1 to avoid approaching the electromagnetic heating device 1 and interfering with the electromagnetic heating device 1 heating the oil pipe 6.

[0065] In the preferred embodiment, a threaded adjustment sleeve 807 is provided on the outside of the connecting pipe portion 803, and a connecting ring 806 is also provided on the outside of the adjusting sleeve 807. The connecting ring 806 can rotate relative to the adjusting sleeve 807. A scraper rod 805 is also provided, and hinged gas springs 809 are provided at both ends of the scraper rod 805. Each gas spring 809 is hinged to the connecting ring 806. A hinged connecting rod 808 is also provided at one end of the scraper rod 805, and the connecting rod 808 is hinged to the nozzle head 804.

[0066] The gas springs 809 at both ends of the scraper rod 805 may be different. The outer wall of the adjusting sleeve 807 is provided with a ring groove, and the connecting ring 806 is provided with a top screw. The top screw passes through the connecting ring 806 and is inserted into the ring groove. The adjusting sleeve 807 can be rotated to adjust the posture and position of the scraper rod 805 so that the scraper rod 805 is close to the inner wall of the oil pipe 6. When the internal cleaning device 8 rotates, the scraper rod 805 can rotate and break up some of the clumped oil stains, thereby reducing the scraping pressure of the internal baffle device 9.

[0067] In the preferred solution, a convex ring portion 303 is provided on the outer wall of one end of the connecting segment 302 close to the internal cleaning device 8, and ceramic sealing sleeves 304 are sleeved on both sides of the convex ring portion 303. A sinking structure is provided at the end of the connecting pipe portion 803, and the ceramic sealing sleeve 304 is inserted into the sinking structure. A stop end sleeve 810 is also provided at the end of the connecting pipe portion 803, and the stop end sleeve 810 rests on the ceramic sealing sleeve 304.

[0068] The stopper sleeve 810 is threadedly connected to the outer wall of the connecting pipe 803 and extends into the connecting pipe 803, forming a stop for the ceramic sealing sleeve 304 without compressing it. The ceramic sealing sleeve 304 has the characteristics of wear resistance and low friction coefficient, and has good dynamic sealing properties.

[0069] In a preferred solution, the collar 1001 is provided with a plurality of guide bases 1003 along the circumference, the guide base 1003 is provided with a wheel frame 1004 , and a rotatable abutting wheel 1005 is provided at the end of the wheel frame 1004 , and the abutting wheel 1005 abuts against the inner wall of the oil pipe 6 and rolls.

[0070] The axis of the rotating shaft of the abutting wheel 1005 is not perpendicular to the central axis of the oil pipe 6.

[0071] Since the cantilever of the extended shaft 301 is relatively long, in the initial stage, the traction wheel 401 below the extended shaft 301 near the cleaning station 2 needs to be lifted and hold the extended shaft 301 until the oil pipe 6 moves to the right and is sleeved on the inner support device 10. At this time, the left end of the extended shaft 301 is supported, and the traction wheel 401 can be lowered to a height that can lift the oil pipe 6.

[0072] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An automatic cleaning device for oil pipe grease, characterized by: The invention comprises an electromagnetic heating device (1), a cleaning station (2) and an end support device (3) arranged in a straight line, wherein the end support device (3) is provided with an outward-extending shaft (301) on a side close to the cleaning station (2), and the end of the outward-extending shaft (301) is provided at the cleaning station (2), and the cleaning station (2) is provided with a cleaning box (201), an inner chamber (203) is provided in the cleaning box (201), and channel holes (205) are provided at both ends of the inner chamber (203), an outer cleaning device (7) and an inner cleaning device (8) are provided in the inner chamber (203), and the outward-extending shaft (301) is provided with a cleaning box (201). The end of the shaft (301) is connected to the internal cleaning device (8), the internal cleaning device (8) is provided with circumferentially arranged inner nozzles (801), the external cleaning device (7) is provided with circumferentially arranged outer nozzles (701), the oil pipe (6) passes through the electromagnetic heating device (1) and the channel hole (205) and is sleeved on the outside of the extended shaft (301), and a plurality of lifting and traction units (4) arranged in a straight line at intervals are further provided below the oil pipe (6), the lifting and traction unit (4) includes a liftable traction wheel (401), and the traction wheel (401) rolls against the lower end of the oil pipe (6).

2. The automatic cleaning device for oil pipe grease according to claim 1 is characterized by: An inner baffle device (9) is further provided on the extended shaft (301) near the inner cleaning device (8), and the inner baffle device (9) includes a plurality of inner scrapers (901) arranged along the circumferential direction, and the outer sides of the inner scrapers (901) abut against the inner wall of the oil pipe (6). An outer scraper device (11) is further provided at the cleaning station (2), and the outer scraper device (11) includes a plurality of outer scrapers (1101) arranged along the circumferential direction, and the outer scrapers (1101) abut against the outer wall of the oil pipe (6).

3. The automatic cleaning device for oil pipe grease according to claim 2 is characterized by: The inner scrapers (901) are arranged in an overlapping manner in the circumferential direction, and a collar (1001) is sleeved on the outer side of the extended shaft (301). The collar (1001) is provided with a plurality of guide blocks (1002) along the circumferential direction. A slidable scraper sleeve (902) is sleeved on the guide block (1002). The scraper sleeve (902) is connected to the side end of the inner scraper (901) away from the inner cleaning device (8). A sinking groove structure is provided at the end of the guide block (1002). A spring (903) is provided in the sinking groove structure. The end of the spring (903) abuts against the scraper sleeve (902). A hollow groove (1006) is provided on the guide block (1002). A transverse pin (904) is provided on the side wall of the scraper sleeve (902). The transverse pin (904) is inserted into the hollow groove (1006).

4. The automatic cleaning device for oil pipe grease according to claim 1 is characterized by: The end of the extended shaft (301) is provided with a connecting segment (302), and the internal cleaning device (8) is rotatably sleeved with the connecting segment (302). The internal cleaning device (8) comprises a connecting pipe portion (803) and a nozzle head portion (804). The connecting pipe portion (803) is connected to the connecting segment (302). The nozzle head portion (804) is provided with a plurality of radial extension tubes (802) along the circumferential direction. The internal nozzle (801) is provided at the end of the radial extension tube (802). The injection axis of the internal nozzle (801) is arranged in an eccentric manner with the rotation axis of the internal cleaning device (8). The injection recoil force of the internal nozzle (801) drives the internal cleaning device (8) to rotate.

5. The automatic cleaning device for oil pipe grease according to claim 4 is characterized in that: The nozzle (801) is inclined toward a side of the inward cleaning device (8) close to the connecting segment (302), the extended shaft (301) includes a central tube (306), the central tube (306) is communicated with the connecting segment (302), a cleaning liquid inlet pipe (12) is provided on the side wall of the central tube (306) close to the end support device (3), an outer layer tube (305) is provided on the outer side of the central tube (306), a clamping cavity (307) is provided between the outer layer tube (305) and the central tube (306), a front support sleeve (308) and a rear support sleeve (310) are provided at both ends of the clamping cavity (307), the front support sleeve (308) is provided with a plurality of drainage holes (309) along the circumferential direction, a sealing ring (311) is provided at one end of the rear support sleeve (310) away from the clamping cavity (307), the inner wall of the sealing ring (311) is sleeved on the central tube (306), and a mixed liquid discharge pipe (13) is provided on the side wall of the rear support sleeve (310).

6. The automatic cleaning device for oil pipe grease according to claim 5 is characterized by: The inner cleaning device (8) is provided with a support arm (811) at one end close to the connecting segment (302), and is also provided with a swing rod (14). The middle portion of the swing rod (14) is hinged to the support arm (811). The two ends of the swing rod (14) are respectively provided with a swing ball (15) and a contact piece (17). A magnetic block (16) is provided at the end of the inner cleaning device (8). The magnetic block (16) attracts the swing ball (15). The inner cleaning device (8) rotates to separate the swing ball (15) from the magnetic block (16), and the swing rod (14) swings to make the contact piece (17) contact the outer wall of the connecting segment (302).

7. The automatic cleaning device for oil pipe grease according to claim 5 is characterized by: The nozzle of the outer nozzle (701) is directed toward a side away from the electromagnetic heating device (1).

8. The automatic cleaning device for oil pipe grease according to claim 4 is characterized by: The communicating tube portion (803) is provided with a threaded adjustment sleeve (807) on the outside, and a connecting ring (806) is also provided on the outside of the adjustment sleeve (807). The connecting ring (806) can rotate relative to the adjustment sleeve (807). A scraper rod (805) is also provided. Both ends of the scraper rod (805) are provided with hinged gas springs (809). Each gas spring (809) is hinged to the connecting ring (806). One end of the scraper rod (805) is also provided with a hinged connecting rod (808). The connecting rod (808) is hinged to the nozzle head (804).

9. The automatic cleaning device for oil pipe grease according to claim 4 is characterized by: A convex ring portion (303) is provided on the outer wall of one end of the connecting segment (302) close to the internal cleaning device (8), and ceramic sealing sleeves (304) are sleeved on both sides of the convex ring portion (303). A sinking groove structure is provided at the end of the connecting pipe portion (803), and the ceramic sealing sleeve (304) is sleeved in the sinking groove structure. A stop end sleeve (810) is also provided at the end of the connecting pipe portion (803), and the stop end sleeve (810) abuts against the ceramic sealing sleeve (304).

10. The automatic cleaning device for oil pipe grease according to claim 3, characterized in that: The collar (1001) is provided with a plurality of guide bases (1003) along the circumference, the guide bases (1003) are provided with wheel frames (1004), and the ends of the wheel frames (1004) are provided with rotatable abutting wheels (1005), which abut against the inner wall of the oil pipe (6) and roll.

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