Pipe rod cleaning machine

Abstract

The invention relates to the technical field of oil and gas field pipe rod cleaning, in particular to a pipe rod cleaning machine which comprises a material waiting frame, a feeding chain set, a circulating chain set, a discharging mechanism, a heating assembly and a cleaning tank used for storing cleaning liquid. A feeding chain set capable of conveying the pipe rods on the material waiting frame to the position above the rear portion of the cleaning tank one by one is arranged between the material waiting frame and the cleaning tank. After to-be-cleaned pipe rods are placed on the material waiting frame, the feeding chain set can lift the pipe rods on the material waiting frame one by one and then move forwards after working, then the circulating chain set receives the pipe rods and moves the pipe rods in the cleaning tank along a snakelike path, in the moving process, polished rods are soaked in heated cleaning liquid in the cleaning tank, and the polished rods are cleaned. In this way, crude oil and paraffin on the surface of the pipe rod can be cleaned, the feeding chain set and the circulating chain set are matched, so that the structure of the cleaning machine is more compact and light, the failure rate can be reduced, and the follow-up maintenance operation difficulty is lower.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field pipe cleaning technology, and is a pipe cleaning machine. Background Technology

[0002] In rod pump oil production systems, the working environment and characteristics of the well tubing and sucker rod result in the presence of crude oil, paraffin wax, mud, and other contaminants on their surfaces. During well workover operations, these tubing and rods need to be retrieved from the well and undergo cleaning, straightening, flaw detection, and thread repair before being lowered back into the well. Among these processes, cleaning is a crucial step in ensuring the quality of subsequent procedures.

[0003] Currently, commonly used cleaning methods mainly include steaming, medium-frequency electric heating cleaning, and high-pressure water jet cleaning. Steaming involves bundling the pipe and immersing it in hot water or alkaline solution. This method is labor-intensive, inefficient, and incompletely cleans the pipe, posing a risk of burns from splashing corrosive liquids. Medium-frequency electric heating cleaning uses electromagnetic induction to heat the pipe body, melting and removing deposits. However, the equipment is expensive, it is only suitable for magnetic materials, and it is difficult to clean internal holes. High-pressure water jet cleaning can remove surface dirt, but its effectiveness in removing viscous crude oil and wax is limited, and it generates a large amount of oily wastewater that is difficult to treat.

[0004] The aforementioned methods generally suffer from problems such as inability to operate continuously, high energy consumption, low automation, and poor environmental performance. Chinese patent document CN114558849A discloses an automatic oil pipe thermal cleaning machine, which includes a cleaning tank, a feeding mechanism, a rinsing mechanism, a heating device, a guide frame, a drive assembly, and a slag scraping mechanism. The front of the cleaning tank is equipped with a feeding mechanism that can transport the oil pipe to the inner front of the cleaning tank. The rear of the cleaning tank is equipped with a rinsing mechanism for cleaning the inner wall of the oil pipe. The bottom of the cleaning tank is equipped with a heating device for heating the cleaning fluid inside the cleaning tank. Several guide frames are fixedly installed at intervals on the upper inner side of the cleaning tank above the heating device. Several U-shaped guide grooves with upward openings are evenly distributed on the upper side of the guide frames. The cleaning tank is equipped with a transport assembly that can transport the oil pipe on the upper front of the guide frame along a serpentine path to the rear of the cleaning tank during operation. The left side of the cleaning tank is equipped with a drive assembly that drives the transport device. The upper rear side of the transport assembly is equipped with a slag scraping mechanism for scraping off the oil sludge on the surface of the cleaning fluid inside the cleaning tank. However, the equipment has a relatively complex structure, high operating costs and failure rate, and is difficult to maintain. Summary of the Invention

[0005] This invention provides a pipe cleaning machine that overcomes the shortcomings of the prior art and can effectively solve the problems of high operating costs and difficult maintenance of existing pipe cleaning equipment.

[0006] The technical solution of the present invention is achieved through the following measures: a pipe cleaning machine includes a waiting rack, a feeding chain group, a circulating chain group, a discharging mechanism, a heating component, and a cleaning tank for storing cleaning fluid. A waiting rack for placing pipes is provided behind the cleaning tank. A feeding chain group is provided between the waiting rack and the cleaning tank to transport the pipes on the waiting rack one by one to the upper rear part of the cleaning tank. A circulating chain group is provided in the cleaning tank to receive the pipes transported by the feeding chain group and to the upper front part of the cleaning tank. The circulating chain group transports the pipes along a serpentine path in the cleaning tank so that the pipes can be immersed in the cleaning fluid in the cleaning tank multiple times. A discharging mechanism is provided on the upper front side of the cleaning tank to receive the pipes transported by the circulating chain group and to the front of the cleaning tank. A heating component for heating the cleaning fluid is provided in the cleaning tank.

[0007] The following are further optimizations and / or improvements to the above-mentioned technical solution: The aforementioned circulating chain assembly may include an isolation component, a support component, a circulating drive shaft, a circulating driven shaft, a circulating chain assembly, circulating hook plates, and a drive mechanism. An isolation component is fixedly installed inside the cleaning tank. The upper side of the isolation component has several horizontally penetrating mounting slots spaced at intervals. Guide ramps are provided on the upper side of the isolation component corresponding to the front and rear positions of each mounting slot. The rear of the guide ramps smoothly transitions downwards relative to the front. A support component is installed in each mounting slot, forming an upward-opening U-shaped conveying channel between the support component and the inner wall of the mounting slot. A circulating drive shaft passes through the inner side of the upper part of each support component. The left end of each circulating drive shaft passes through the left side of the cleaning tank in a sealed manner and is connected to the drive mechanism. A circulating driven shaft is rotatably installed on the lower part of each support component. Each circulating driven shaft is connected to the corresponding circulating drive shaft via a circulating chain assembly. Several circulating hook plates are distributed circumferentially at intervals on the outer side of the circulating chain assembly. When the circulating hook plates of each circulating chain assembly move, they can convey the pipe rod from the upper rear end of the conveying channel to the upper front end of the conveying channel.

[0008] The aforementioned isolation assembly may include several partitions fixedly installed in the cleaning tank at left and right intervals. Each partition has several through mounting holes at intervals on its side. Each partition has three mounting slots at intervals in front and back on its upper side. A guide plate is fixed on the upper side of the isolation assembly corresponding to the front and rear positions of each mounting slot. The upper side of the guide plate has a guide slope that is inclined downwards at the rear relative to the front.

[0009] The aforementioned support components may include a fixing plate and a fixing rod. Each mounting slot is provided with an elongated oval fixing plate. An upward-opening U-shaped conveying channel is formed between the outer side of the fixing plate and the inner wall of the mounting slot. A fixing rod is fixed to the inner wall of the cleaning tank at the position corresponding to each circulating drive shaft and circulating driven shaft. The middle part of the fixing rod is fixed to the fixing plate at the corresponding position.

[0010] The aforementioned circulating chain assembly may include a driving sprocket, a driven sprocket, and a transmission chain. A driving sprocket is fixedly installed on the outside of the circulating driving shaft corresponding to the left side of the partition, and a driven sprocket is fixedly installed on the outside of the circulating driven shaft corresponding to the position of the driving sprocket. The driving sprocket and the driven sprocket are connected by a transmission chain. Circulating hook plates are fixedly installed on the outside of the transmission chain at intervals along the circumference.

[0011] The aforementioned circulating hook plate may include a pair of left hooks and right hooks arranged on the left and right sides of the transmission chain. The left hooks and right hooks have the same structure. The upper front part of the upper left hook is provided with a horizontally through arc-shaped groove. The upper rear part of the upper left hook is tilted backward relative to the lower part. A connecting pin is fixedly installed between the left hooks and the right hooks.

[0012] The aforementioned feeding chain assembly may include a feeding drive shaft, a feeding driven shaft, a feeding chain assembly, and feeding hook plates. Several support rods are fixedly installed at intervals on the left and right sides of the front side of the waiting rack. A support plate is fixedly installed on the left side of each support rod. The left end of the feeding drive shaft passes through the front of all the support plates and is connected to the drive mechanism. A feeding driven shaft is rotatably installed on the left side of the rear part of each support plate. Each feeding driven shaft is connected to the feeding drive shaft through the feeding chain assembly. The feeding chain assembly has the same structure as the circulating chain assembly. Several feeding hook plates are distributed circumferentially at intervals on the outer side of each feeding chain assembly. The feeding hook plates have the same structure as the circulating hook plates.

[0013] The aforementioned drive mechanism may include a drive motor, a first reducer, a second reducer, a third reducer, and a fourth reducer. The first reducer, the second reducer, and the third reducer are all dual-output-shaft reducers. The output shaft of the drive motor is drivenly connected to the input shaft of the first reducer. The first output shaft of the first reducer, the input shaft of the second reducer, the first output shaft of the second reducer, the input shaft of the third reducer, the first output shaft of the third reducer, and the input shaft of the fourth reducer are sequentially drivenly connected together. The second output shafts of the first reducer, the second output shafts of the second reducer, and the second output shafts of the third reducer are respectively drivenly connected to the left end of the corresponding circulating drive shaft. The output shaft of the fourth reducer is drivenly connected to the left end of the feeding drive shaft.

[0014] The aforementioned feeding mechanism may include a feeding plate, a rotating shaft, and a feeding cylinder. A rotating shaft is rotatably mounted on the upper front side of the cleaning tank. Several feeding plates are fixedly mounted on the outer side of the rotating shaft at intervals. A feeding groove with an obtuse angle is provided on the rear side of the feeding plate. A feeding cylinder is provided between the upper front side of the feeding plate and the lower part of the cleaning tank.

[0015] The aforementioned heating assembly may include a circulating heating pipe, a heating mechanism, a circulating pump, an inlet pipe, an outlet pipe, nozzles, an inner flushing pipe, and valves. A circulating heating pipe is provided on the lower inner side of the cleaning tank. The circulating heating pipe is S-shaped and has heat dissipation fins on its outer side. The first and second ends of the circulating heating pipe are sealed and pass through the right side of the cleaning tank before being connected to the heating mechanism. A circulating pump is provided on the right side of the cleaning tank. An inlet pipe is fixedly connected between the inlet of the circulating pump and the lower right side of the cleaning tank. An outlet pipe is provided above the front of the cleaning tank. The right end of the outlet pipe is fixedly connected to the outlet of the circulating pump. Several spray holes with internal and external connections are provided at intervals on the left and right sides of the outlet pipe corresponding to the position of the cleaning tank. Each spray hole is equipped with a nozzle. The left end of the outlet pipe is fixedly connected to the upper left end of the inner flushing pipe, which has a U-shaped structure. A valve is installed on the upper part of the inner flushing pipe.

[0016] This invention places the pipes to be cleaned on the waiting rack. After the feeding chain works, it can lift the pipes on the waiting rack one by one and move them forward. Then, the circulating chain receives the pipes and moves them along a serpentine path in the cleaning tank. During the movement, the heated cleaning liquid in the cleaning tank soaks the bare pipes, which can clean the crude oil and paraffin on the surface of the pipes. The cooperation between the feeding chain and the circulating chain makes the structure of the cleaning machine more compact and lightweight, which can reduce the failure rate and make subsequent maintenance easier. Attached Figure Description

[0017] Appendix Figure 1 These are three-dimensional structural schematic diagrams of embodiments one to ten of the present invention.

[0018] Appendix Figure 2 For the appendix Figure 1 A magnified structural diagram at point B in the middle.

[0019] Appendix Figure 3 These are top view structural diagrams of embodiments one to ten of the present invention.

[0020] Appendix Figure 4 For the appendix Figure 3 A magnified structural diagram at point C.

[0021] Appendix Figure 5 For the appendix Figure 3 A magnified structural diagram at point D.

[0022] Appendix Figure 6 This is a schematic diagram of the left-side partial cross-sectional structure of embodiments one to ten of the present invention.

[0023] Appendix Figure 7 For the appendix Figure 6 A magnified structural diagram at point E in the middle.

[0024] The codes in the attached diagram are as follows: 1 is the tube rod, 2 is the waiting rack, 3 is the cleaning tank, 4 is the circulating drive shaft, 5 is the circulating driven shaft, 6 is the guide slope, 7 is the conveying channel, 8 is the support plate, 9 is the partition plate, 10 is the guide plate, 11 is the fixing plate, 12 is the fixing rod, 13 is the drive sprocket, 14 is the driven sprocket, 15 is the transmission chain, 16 is the left hook, 17 is the right hook, 18 is the slot, 19 is the connecting pin, 20 is the loading drive shaft, and 2... 1 is the feeding driven shaft, 22 is the feeding chain assembly, 23 is the feeding hook plate, 24 is the support rod, 25 is the drive motor, 26 is the first reducer, 27 is the second reducer, 28 is the third reducer, 29 is the fourth reducer, 30 is the unloading plate, 31 is the rotating shaft, 32 is the unloading cylinder, 33 is the circulating heating tube, 34 is the circulating pump, 35 is the liquid inlet pipe, 36 is the liquid outlet pipe, 37 is the internal flushing pipe, 38 is the valve, and 39 is the heat dissipation fins. Detailed Implementation

[0025] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0026] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a center-A orientation, and the positional relationships such as front, back, top, bottom, left, and right are based on the instructions attached. Figure 1 The orientation of the layout in the A direction is used to determine the direction.

[0027] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 , 3 As shown in Figure 6, the pipe cleaning machine includes a waiting rack 2, a feeding chain group, a circulating chain group, a discharging mechanism, a heating component, and a cleaning tank 3 for storing cleaning fluid. The waiting rack 2 for placing pipe rods 1 is located behind the cleaning tank 3. Between the waiting rack 2 and the cleaning tank 3, there is a feeding chain group that can transport the pipe rods 1 on the waiting rack 2 one by one to the upper rear part of the cleaning tank 3. The cleaning tank 3 is equipped with a circulating chain group that can receive the pipe rods 1 transported by the feeding chain group and transport the pipe rods 1 to the upper front part of the cleaning tank 3. The circulating chain group transports the pipe rods 1 along a serpentine path in the cleaning tank 3 so that the pipe rods 1 can be soaked multiple times in the cleaning fluid in the cleaning tank 3. The upper front side of the cleaning tank 3 is equipped with a discharging mechanism that can receive the pipe rods 1 transported by the circulating chain group and transport the pipe rods 1 to the front of the cleaning tank 3. The cleaning tank 3 is equipped with a heating component for heating the cleaning fluid.

[0028] Depending on the requirements, the upper surface of the waiting rack 2 can be flat or inclined. During use, after placing the pipe rod 1 to be cleaned on the waiting rack 2, the feeding chain group can lift the pipe rod 1 on the waiting rack 2 one by one and move it forward. Then, the circulating chain group receives the pipe rod 1 and moves it along a serpentine path in the cleaning tank 3. During the movement, the heated cleaning liquid in the cleaning tank 3 soaks the clean rod, which can clean the crude oil and paraffin on the surface of the pipe rod 1. The cooperation between the feeding chain group and the circulating chain group makes the structure of the cleaning machine more compact and lightweight, which can reduce the failure rate and make subsequent maintenance work easier.

[0029] The above-mentioned pipe cleaning machine can be further optimized and / or improved according to actual needs: Example 2: As an optimization of the above examples, as shown in the appendix. Figures 1 to 7 As shown, the circulating chain assembly includes an isolation component, a support component, a circulating drive shaft 4, a circulating driven shaft 5, a circulating chain assembly, a circulating hook plate, and a drive mechanism. An isolation component is fixedly installed inside the cleaning tank 3. Several horizontally penetrating mounting slots are spaced at intervals on the upper side of the isolation component. Guide ramps 6 are provided on the upper side of the isolation component at positions corresponding to the front and rear of each mounting slot. The rear of the guide ramps 6 smoothly transitions downwards relative to the front. A support component is provided inside each mounting slot, forming an upward-opening U-shaped conveying channel 7 between the support component and the inner wall of the mounting slot. Each support assembly has a circulating drive shaft 4 passing through its upper inner side. The left end of each circulating drive shaft 4 is sealed and passes through the left side of the cleaning tank 3 and is connected to the drive mechanism. Each support assembly has a circulating driven shaft 5 rotatably installed at its lower part. Each circulating driven shaft 5 is connected to the corresponding circulating drive shaft 4 through a circulating chain assembly. Several circulating hook plates are distributed circumferentially on the outer side of the circulating chain assembly. When the circulating hook plates of each circulating chain assembly move, they can transport the tube rod 1 from the upper rear end of the conveying channel 7 to the upper front end of the conveying channel 7.

[0030] To facilitate the assembly and disassembly of the circulating drive shaft 4, the circulating drive shaft 4 can be configured into multiple sections. Each row of circulating drive shafts 4 is connected together by existing known transmission shafts. The tube rod 1 on the upper side of the support plate 8 moves forward to the front end and then rolls down to the upper side of the rear guide plate 10. Under the action of gravity, the tube rod 1 rolls forward and falls onto the upper side of the circulating hook plate. Then the tube rod 1 can move downward with the circulating chain group. When the tube rod 1 moves to the bottom of the conveying channel 7, the tube rod 1 will be pushed by the rear circulating hook plate. In this way, the tube rod 1 continues to move upward. When the tube rod 1 moves to the upper front of the conveying channel 7, the tube rod 1 is no longer constrained by the inner wall of the conveying channel 7. The tube rod 1 rolls forward under the action of gravity. This process is repeated, and the tube rod 1 moves along a serpentine path in the conveying channel 7 until it moves to the front of the unloading mechanism.

[0031] Example 3: As an optimization of the above examples, as shown in the appendix. Figures 2 to 7 As shown, the isolation assembly includes several partitions 9 fixedly installed in the cleaning tank 3 at left and right intervals. Each partition 9 has several through mounting holes distributed at intervals on its side. Each partition 9 has three mounting slots at front and back intervals on its upper side. A guide plate 10 is fixed on the upper side of the isolation assembly corresponding to the front and rear positions of each mounting slot. The guide plate 10 has a guide slope 6 on its upper side that is inclined downwards at the rear relative to the front.

[0032] According to requirements, a circulating driven shaft 5 is rotatably installed on the left side of the partition 9 corresponding to each installation slot position. There are 3 circulating active shafts 4. The left end of each circulating active shaft 4 passes through the support assembly in each row of installation slots. The upper part of the support assembly in each row of installation slots is provided with shaft holes for passing through the circulating active shaft 4. The guide plate 10 is integrally set with the partition 9. The partition 9 can provide support and reinforcement to the inner wall of the cleaning tank 3 on the one hand, and form a U-shaped conveying channel 7 with the guide plate 10 on the other hand. In this way, the tube rod 1 moves from top to bottom at the rear of the conveying channel 7 with the circulating hook plate. Then the circulating hook plate flips its direction, and the tube rod 1 can be pushed upward by the circulating hook plate behind it. When the tube rod 1 moves upward and separates from the conveying channel 7, the tube rod 1 is no longer blocked by the inner wall of the conveying channel 7 and rolls forward on the guide slope 6. The above process is repeated. The tube rod 1 is transferred from one space to another through the circulating chain group, moving in a "snake" trajectory to extend its heating time.

[0033] Example 4: As an optimization of the above examples, as shown in the appendix. Figures 2 to 7 As shown, the support assembly includes a fixing plate 11 and a fixing rod 12. Each mounting slot is provided with an elongated oval fixing plate 11. The outer side of the fixing plate 11 and the inner wall of the mounting slot form an upward-opening U-shaped conveying channel 7. The inner wall of the cleaning tank 3 corresponding to the position between each circulating drive shaft 4 and circulating driven shaft 5 is fixed with a fixing rod 12. The middle part of the fixing rod 12 is fixed together with the fixing plate 11 at the corresponding position.

[0034] As required, the fixing rod 12 is a hollow structure. During use, by setting the fixing rod 12, the fixing plate 11 can be supported, preventing the circulating drive shaft 4 from deforming due to excessive load. Both ends of the fixing rod 12 are fixedly connected to the inner wall of the cleaning tank 3, or one end of the fixing rod 12 can be fixedly connected to the inner wall of the cleaning tank 3.

[0035] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2As shown in Figures 6 and 7, the circulating chain assembly includes a drive sprocket 13, a driven sprocket 14, and a transmission chain 15. The drive sprocket 13 is fixedly installed on the outside of the circulating drive shaft 4 corresponding to the left side of the partition 9, and the driven sprocket 14 is fixedly installed on the outside of the circulating driven shaft 5 corresponding to the position of the drive sprocket 13. The drive sprocket 13 and the driven sprocket 14 are connected by transmission through the transmission chain 15. The circulating hook plate is fixedly installed on the outside of the transmission chain 15 at intervals along the circumference.

[0036] As required, the transmission chain 15 is located on the left side of the fixed plate 11. During use, the chain drive can work normally in harsh environments such as high temperature, humidity, dust, and oil, and is not easily affected by the environment. The chain drive can also keep the circulating drive shaft 4 and the circulating driven shaft 5 in the three mounting slots rotating synchronously, so that when the circulating hook plate moves with the transmission chain 15, it can move the tube rod 1 in sequence along the conveying channel 7 and the guide plate 10 in a serpentine pattern, avoiding the phenomenon of tube rod 1 piling up together and not being cleaned thoroughly. This can ensure the contact time between the tube rod 1 and the cleaning liquid in the cleaning tank 3, thereby ensuring the cleaning quality.

[0037] Example 6: As an optimization of the above examples, as shown in the appendix Figure 2 , 4 As shown in Figure 7, the circulating hook plate includes a left hook 16 and a right hook 17 arranged in pairs on the left and right sides of the transmission chain 15. The left hook 16 and the right hook 17 have the same structure. The upper front part of the upper left hook 16 is provided with a left-right through arc-shaped slot 18. The upper rear part of the upper left hook 16 is inclined backward relative to the lower part. A connecting pin 19 is fixedly installed between the left hook 16 and the right hook 17.

[0038] The structure of the left hook 16 located in other positions is the same as that of the top left hook 16. The circulation hook plate is designed as two plate-shaped hooks, which can reduce the weight of the circulation hook plate, thereby reducing the load on the circulation drive shaft 4 and the circulation driven shaft 5, extending the service life. At the same time, it also facilitates the disassembly and assembly of the left hook 16, right hook 17 and transmission chain 15, reducing the difficulty of subsequent maintenance. The upper front side of the top left hook 16 is provided with a left-right through arc-shaped slot 18. The slot 18 can limit and constrain the tube rod 1, preventing the tube rod 1 from shaking or colliding during movement, thereby avoiding damage to the tube rod 1.

[0039] Example 7: As an optimization of the above examples, as shown in the appendix. Figure 1 , 3As shown in Figures 6 and 7, the feeding chain assembly includes a feeding drive shaft 20, a feeding driven shaft 21, a feeding chain assembly 22, and feeding hook plates 23. Several support rods 24 are fixedly installed at intervals on the left and right sides of the front side of the waiting rack 2. A support plate 8 is fixedly installed on the left side of each support rod 24. The left end of the feeding drive shaft 20 passes through the front of all the support plates 8 and is connected to the drive mechanism. A feeding driven shaft 21 is rotatably installed on the left side of the rear part of each support plate 8. Each feeding driven shaft 21 is connected to the feeding drive shaft 20 through the feeding chain assembly 22. The feeding chain assembly 22 has the same structure as the circulating chain assembly. Several feeding hook plates 23 are distributed circumferentially on the outer side of each feeding chain assembly 22. The feeding hook plates 23 have the same structure as the circulating hook plates.

[0040] According to requirements, the support plate 8 is oblong. During use, multiple support rods 24 are set to facilitate the fixing of the support plate 8 and can support oil pipes and sucker rods of various lengths. When the loading hook plate 23 moves with the loading chain assembly 22, it lifts the pipe rod 1 on the waiting rack 2 to the upper side of the support plate 8, thus providing support for the pipe rod 1 and reducing the load on the loading assembly. As the loading hook plate 23 continues to move with the loading chain assembly 22, it pushes the pipe rod 1 on the upper side of the support plate 8 forward into the cleaning tank 3. During the movement, the loading hook plate 23 can use the cylindrical outer surface of the pipe rod 1 to push the pipe rod 1 to move on the upper side of the support plate 8. Several support rods 24 are fixedly installed at intervals on the left and right sides of the front side of the waiting rack 2. This facilitates the installation of the support plate 8 and the loading assembly and simplifies the structure of the waiting rack. Each support rod 24 has a fixed support leg on the lower front side, which provides support for the support rod 24.

[0041] Example 8: As an optimization of the above examples, as shown in the appendix Figures 1 to 4 As shown in Figures 6 and 7, the drive mechanism includes a drive motor 25, a first reducer 26, a second reducer 27, a third reducer 28, and a fourth reducer 29. The first reducer 26, the second reducer 27, and the third reducer 28 are all dual-output shaft reducers. The output shaft of the drive motor 25 is connected to the input shaft of the first reducer 26. The first output shaft of the first reducer 26, the input shaft of the second reducer 27, the first output shaft of the second reducer 27, the input shaft of the third reducer 28, the first output shaft of the third reducer 28, and the input shaft of the fourth reducer 29 are sequentially connected together. The second output shafts of the first reducer 26, the second output shafts of the second reducer 27, and the second output shafts of the third reducer 28 are respectively connected to the left end of the corresponding circulating drive shaft 4. The output shaft of the fourth reducer 29 is connected to the left end of the feeding drive shaft 20.

[0042] Depending on the requirements, the first reducer 26, the second reducer 27, the third reducer 28, and the fourth reducer 29 can all have the same structure. All of these reducers are existing, well-known technologies, such as HD bevel gear right-angle steering gears, T-series bevel gear right-angle steering gears, SWL screw jacks, or cross reversing devices. The first output shaft of the first reducer 26, the input shaft of the second reducer 27, the first output shaft of the second reducer 27, the input shaft of the third reducer 28, the first output shaft of the third reducer 28, and the input shaft of the fourth reducer 29 are all sequentially connected by couplings. The output shaft of the fourth reducer 29 is connected to the left end of the feeding drive shaft 20 via a transmission shaft. This arrangement allows the movement of the tube rod 1 to be synchronized, maintaining a consistent rhythm, ensuring that each tube rod 1 has sufficient cleaning time within the cleaning tank 3, thereby cleaning the tube rod 1 thoroughly.

[0043] Example 9: As an optimization of the above examples, as shown in the appendix Figures 1 to 6 As shown, the feeding mechanism includes a feeding plate 30, a rotating shaft 31, and a feeding cylinder 32. The rotating shaft 31 is rotatably installed on the upper front side of the cleaning tank 3. Several feeding plates 30 are fixedly installed on the outer side of the rotating shaft 31 at intervals. The rear side of the feeding plate 30 is provided with a feeding groove in the shape of an obtuse angle. The feeding cylinder 32 is provided between the upper front side of the feeding plate 30 and the lower part of the cleaning tank 3.

[0044] As required, in the initial state, the piston rod of the feeding cylinder 32 is extended. The feeding cylinder 32 is located in the middle of the rotating shaft 31, and the piston rod of the feeding cylinder 32 is hinged to the lower front side of the feeding plate 30, which makes it easier for the piston rod of the feeding cylinder 32 to retract. After the cleaned tube rod 1 rolls from the front guide plate 10 into the feeding groove of the feeding plate 30, the feeding cylinder 32 starts to work. After the piston rod of the feeding cylinder 32 retracts, it pulls the feeding plate 30. After the feeding plate 30 rotates, it can move the tube rod 1 in the feeding groove to the front. As needed, a transport trolley or storage rack can be set in front of the feeding plate 30 to facilitate the transfer of the cleaned tube rod 1.

[0045] Example 10: As an optimization of the above embodiments, as shown in the appendix Figures 1 to 7As shown, the heating assembly includes a circulating heating tube 33, a heating mechanism, a circulating pump 34, an inlet pipe 35, an outlet pipe 36, a nozzle, an inner flushing pipe 37, and a valve 38. The circulating heating tube 33 is located on the lower inner side of the cleaning tank 3. The circulating heating tube 33 is S-shaped, and the outer side of the circulating heating tube 33 is provided with heat dissipation fins 39. The first and second ends of the circulating heating tube 33 are sealed and pass through the right side of the cleaning tank 3 and are connected to the heating mechanism. The circulating pump 34 is located on the right side of the cleaning tank 3. The inlet of the circulating pump 34 is fixedly connected to the lower right side of the cleaning tank 3 by an inlet pipe 35. The outlet pipe 36 is located above the front of the cleaning tank 3. The right end of the outlet pipe 36 is fixedly connected to the outlet of the circulating pump 34. A number of spray holes with internal and external communication are provided at intervals on the left and right sides of the outlet pipe 36 corresponding to the position of the cleaning tank 3. Each spray hole is equipped with a nozzle. The left end of the outlet pipe 36 is fixedly connected to the upper left end of the inner flushing pipe 37, which has a U-shaped structure. A valve 38 is installed on the upper part of the inner flushing pipe 37.

[0046] Depending on the requirements, the heating mechanism is a known existing technology, such as a boiler or heat exchanger. The lower part of the circulating heating tube 33 is inserted into the mounting hole at the bottom of the partition plate 9. The setting of the heat dissipation fins 39 can not only maintain the distance between the circulating heating tube 33 and the inner wall of the cleaning tank 3, but also facilitate the exchange of heat between the medium in the circulating heating tube 33 and the cleaning liquid in the cleaning tank 3. The medium in the circulating heating tube 33 can be heat transfer oil. After being heated by the boiler, the heat transfer oil flows into the circulating heating tube 33 and transfers heat through the heat dissipation fins 39 to maintain the cleaning liquid (the cleaning liquid is an alkaline aqueous solution or a biodegradable cleaning agent) in the cleaning tank 3 at 80°C to 100°C. In this way, the crude oil and wax adhering to the surface of the tube rod 1 are melted by heat and float to the surface of the liquid, and some of them are directly detached.

[0047] The circulating pump 34 pressurizes the cleaning fluid in the cleaning tank 3 and sends it into the outlet pipe 36. Then, the cleaning fluid is sprayed onto the outer wall of the pipe rod 1 through the nozzle (not shown in the figure). When the oil pipe needs to be cleaned, the valve 38 is adjusted to adjust the water flow rate at the lower right end of the inner flushing pipe 37. The cleaning fluid sprayed from the lower right end of the inner flushing pipe 37 sprays and cleans the inner cavity of the oil pipe, achieving simultaneous cleaning inside and outside. If the sucker rod needs to be cleaned, the valve 38 can be closed. The operation is convenient.

[0048] After cleaning, the tube rod 1 moves to the front guide plate 10 and rolls into the unloading groove of the unloading plate 30. Then the unloading cylinder 32 starts to work. After the piston rod of the unloading cylinder 32 retracts, it pulls the unloading plate 30. The unloading plate 30 rotates around the rotating shaft 31, causing the tube rod 1 to roll into the transport trolley or storage tube rack set in front, thus completing the automatic unloading.

[0049] Valve 38 is opened periodically to discharge deposited impurities in the outlet pipe 36. To facilitate the recovery of floating oil on the surface of the cleaning fluid, a known oil skimmer, such as an oil skimmer or the slag scraping mechanism described in the Chinese patent document "Automatic Oil Pipe Thermal Cleaning Machine" (publication number CN114558849A), can be installed on the upper part of the cleaning tank 3, thus enabling resource reuse.

[0050] This application automates the entire process from feeding, heating, spraying to unloading without manual intervention, enabling continuous automated operation. During the cleaning process, the pipe rod 1 undergoes a dual action of hot immersion and hot spraying to thoroughly remove complex dirt such as crude oil, paraffin, and mud, ensuring effective cleaning. The cleaning fluid is recycled, and the indirect heating with heat transfer oil has a higher thermal efficiency than the boiling method, achieving energy saving and consumption reduction. It can clean pipe rods 1 with diameters ranging from 16 to 114.3 mm. The chain and nozzles can be quickly disassembled and installed, simplifying maintenance.

[0051] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A pipe cleaning machine, characterized in that... The system includes a waiting rack, a feeding chain assembly, a circulating chain assembly, a discharging mechanism, a heating component, and a cleaning tank for storing cleaning fluid. A waiting rack for placing tubing is located behind the cleaning tank. Between the waiting rack and the cleaning tank is a feeding chain assembly that transports the tubing from the waiting rack to the upper rear of the cleaning tank. Inside the cleaning tank is a circulating chain assembly that receives the tubing from the feeding chain assembly and transports it to the upper front of the cleaning tank. The circulating chain assembly transports the tubing along a serpentine path within the cleaning tank, allowing the tubing to be repeatedly immersed in the cleaning fluid. At the upper front of the cleaning tank is a discharging mechanism that receives the tubing from the circulating chain assembly and transports it to the front of the cleaning tank. A heating component for heating the cleaning fluid is located inside the cleaning tank.

2. The pipe cleaning machine according to claim 1, characterized in that... The circulating chain assembly includes an isolation component, a support component, a circulating drive shaft, a circulating driven shaft, a circulating chain assembly, circulating hook plates, and a drive mechanism. The isolation component is fixedly installed inside the cleaning tank. Several through-holes are spaced at intervals on the upper side of the isolation component. Guide ramps are provided on the upper side of the isolation component at positions corresponding to the front and rear of each mounting slot. The rear of the guide ramps smoothly transitions downwards relative to the front. A support component is installed in each mounting slot, forming an upward-opening U-shaped conveying channel between the support component and the inner wall of the mounting slot. A circulating drive shaft passes through the inner upper part of each support component. The left end of each circulating drive shaft passes through the left side of the cleaning tank and is connected to the drive mechanism. A circulating driven shaft is rotatably installed at the lower part of each support component. Each circulating driven shaft is connected to the corresponding circulating drive shaft via the circulating chain assembly. Several circulating hook plates are distributed circumferentially at intervals on the outer side of the circulating chain assembly. When the circulating hook plates of each circulating chain assembly move, they can convey the pipe rod from the upper rear end of the conveying channel to the upper front end of the conveying channel.

3. The pipe cleaning machine according to claim 2, characterized in that... The isolation assembly includes several partitions that are fixedly installed in the cleaning tank at left and right intervals. Each partition has several through mounting holes at intervals on its side. Each partition has three mounting slots at intervals in front and back on its upper side. A guide plate is fixed on the upper side of the isolation assembly corresponding to the front and rear positions of each mounting slot. The upper side of the guide plate has a guide slope that is inclined downward at the rear relative to the front.

4. The pipe cleaning machine according to claim 3, characterized in that... The support assembly includes a fixing plate and a fixing rod. Each mounting slot is equipped with an elongated oval fixing plate. The outer side of the fixing plate and the inner wall of the mounting slot form an upward-opening U-shaped conveying channel. A fixing rod is fixed to the inner wall of the cleaning tank at the position between each circulating drive shaft and circulating driven shaft. The middle part of the fixing rod is fixed to the fixing plate at the corresponding position.

5. The pipe cleaning machine according to claim 2, 3, or 4, characterized in that... The circulating chain assembly includes a driving sprocket, a driven sprocket, and a transmission chain. A driving sprocket is fixedly installed on the outside of the circulating driving shaft corresponding to the left side of the partition, and a driven sprocket is fixedly installed on the outside of the circulating driven shaft corresponding to the position of the driving sprocket. The driving sprocket and the driven sprocket are connected by a transmission chain. Circulating hook plates are fixedly installed on the outside of the transmission chain at intervals along the circumference.

6. The pipe cleaning machine according to claim 5, characterized in that... The circulating hook plate includes a left hook and a right hook, which are arranged in pairs on the left and right sides of the transmission chain. The left hook and the right hook have the same structure. The upper front part of the upper left hook has a through-hole arc-shaped groove. The upper rear part of the upper left hook is tilted backward relative to the lower part. A connecting pin is fixedly installed between the left hook and the right hook.

7. The pipe cleaning machine according to claim 2, 3, 4, or 6, characterized in that... The feeding chain assembly includes a feeding drive shaft, a feeding driven shaft, a feeding chain assembly, and feeding hook plates. Several support rods are fixedly installed at intervals on the left and right sides of the front side of the waiting rack. A support plate is fixedly installed on the left side of each support rod. The left end of the feeding drive shaft passes through the front of all the support plates and is connected to the drive mechanism. A feeding driven shaft is rotatably installed on the left side of the rear part of each support plate. Each feeding driven shaft is connected to the feeding drive shaft through the feeding chain assembly. The feeding chain assembly has the same structure as the circulating chain assembly. Several feeding hook plates are distributed circumferentially at intervals on the outer side of each feeding chain assembly. The feeding hook plates have the same structure as the circulating hook plates.

8. The pipe cleaning machine according to claim 7, characterized in that... The drive mechanism includes a drive motor, a first reducer, a second reducer, a third reducer, and a fourth reducer. The first reducer, the second reducer, and the third reducer are all dual-output shaft reducers. The output shaft of the drive motor is connected to the input shaft of the first reducer. The first output shaft of the first reducer, the input shaft of the second reducer, the first output shaft of the second reducer, the input shaft of the third reducer, the first output shaft of the third reducer, and the input shaft of the fourth reducer are sequentially connected together. The second output shafts of the first reducer, the second output shafts of the second reducer, and the second output shafts of the third reducer are respectively connected to the left end of the corresponding circulating drive shaft. The output shaft of the fourth reducer is connected to the left end of the feeding drive shaft.

9. The pipe cleaning machine according to claim 2, 3, 4, 6, or 8, characterized in that... The feeding mechanism includes a feeding plate, a rotating shaft, and a feeding cylinder. A rotating shaft is rotatably installed on the upper front side of the cleaning tank. Several feeding plates are fixedly installed on the outer side of the rotating shaft at intervals. A feeding groove with an obtuse angle is provided on the rear side of the feeding plate. A feeding cylinder is provided between the upper front side of the feeding plate and the lower part of the cleaning tank.

10. The pipe cleaning machine according to claim 2, 3, 4, 6, or 8, characterized in that... The heating assembly includes a circulating heating tube, a heating mechanism, a circulating pump, an inlet pipe, an outlet pipe, nozzles, an inner flushing pipe, and valves. A circulating heating tube is located on the inner side of the lower part of the cleaning tank. The circulating heating tube is S-shaped and has heat dissipation fins on its outer side. The first and second ends of the circulating heating tube are sealed and pass through the right side of the cleaning tank before connecting to the heating mechanism. A circulating pump is located on the right side of the cleaning tank. An inlet pipe is fixedly connected between the inlet of the circulating pump and the lower right side of the cleaning tank. An outlet pipe is located above the front part of the cleaning tank. The right end of the outlet pipe is fixedly connected to the outlet of the circulating pump. Several nozzles with internal and external connections are spaced apart on the left and right sides of the outlet pipe corresponding to the position of the cleaning tank. Each nozzle is equipped with a nozzle. The left end of the outlet pipe is fixedly connected to the upper left end of the inner flushing pipe, which has a U-shaped structure. A valve is installed on the upper part of the inner flushing pipe.

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