Combined internal wall degreasing and cleaning device for long-distance pipelines and its usage method

Abstract

This invention provides a combined internal wall degreasing and cleaning device and method for long-distance pipelines, including a cleaning assembly and a power supply unit. The outer periphery of the partition is covered with an elastomer. The end of the partition near the main shaft, the end of the first pipeline cleaner near the main shaft, and the inner wall of the pipeline to be cleaned enclose a first accommodating space. This relates to the field of pipeline cleaning. By forming a first accommodating space between the first pipeline cleaner, the partition, and the inner wall of the pipeline to be cleaned, and placing degreasing fluid within this space, while simultaneously installing an ultrasonic transducer on the main shaft, the ultrasonic action is concentrated in a locally enclosed area, thereby effectively improving the utilization efficiency of the degreasing fluid and the ultrasonic cavitation intensity, and enhancing the peeling effect on the grease deposits. The elastomer-covered structure on the outer periphery of the partition can form a reliable seal with the inner walls of pipelines of different diameters or with certain errors, improving the stability of the first accommodating space and reducing degreasing fluid leakage.

Description

Technical Field

[0001] This invention relates to the field of pipeline cleaning, specifically to a combined internal wall degreasing and cleaning device and its usage method for long-distance pipelines. Background Technology

[0002] Long-distance gas transmission pipelines are widely used in metallurgy, chemical industry, energy, and specialty gas supply, especially in systems with high requirements for media purity and safety, such as oxygen and hydrogen pipelines, where the cleanliness of the pipeline inner wall is subject to strict standards. During the construction, installation, and commissioning phases, due to factors such as processing lubrication, sealing treatment, rust prevention, or assembly operations, a certain amount of grease contaminants inevitably remain on the pipeline inner wall. For oxygen pipelines, when oxygen rubs against the pipe wall under high pressure and high flow rate conditions, if flammable grease is present on the inner wall, it may cause combustion or even deflagration under certain temperature and pressure conditions, seriously threatening operational safety. For some hydrogen pipelines used in high-purity processes or fuel cell applications, if grease remains in the pipeline, carbonaceous byproducts may be generated during transportation and combustion, affecting subsequent chemical reactions or product quality. Therefore, before oxygen pipelines and certain hydrogen pipelines are put into operation, they usually require strict degreasing treatment to ensure that the pipeline meets the technical standards of being oil-averse and free of flammable residues.

[0003] Existing technologies for cleaning long-distance pipelines largely originate from oil or general media transportation, such as mechanical scraping using pipeline pigs or periodic pigging cleaning using pig transmitters and receivers. These methods are primarily used to remove deposits that gradually accumulate during transportation, and their design purpose is not to achieve high-cleanliness degreasing. Furthermore, traditional chemical circulation cleaning relies on external circulation pump systems and large-scale liquid circulation equipment, resulting in complex structures that struggle to create stable, locally enhanced degreasing spaces within long-distance enclosed pipelines. Single mechanical pigs have limited ability to remove tightly adhered grease films, while ultrasonic methods alone suffer from significant energy attenuation in long-distance gas pipelines due to the lack of effective sealed liquid chambers, making it difficult to concentrate the energy on the area to be treated. In addition, long-distance pipelines commonly contain bends and complex routing structures, making conventional cleaning devices prone to instability or jamming when navigating bends, further impacting the continuity and reliability of degreasing.

[0004] Therefore, the problem of grease residue formed in oxygen pipelines and certain hydrogen pipelines during the construction phase, and how to construct a locally enclosed degreasing space inside long-distance grease-resistant pipelines, and achieve safe, controllable, continuous and efficient degreasing treatment through mechanical structures, while taking into account the adaptability of pipe bends and operational stability, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] According to embodiments of the present invention, a combined internal wall degreasing and cleaning device and a method for using long-distance conveying pipelines are provided. This addresses the technical problems existing in the background art described above.

[0006] In a first aspect of the present invention, a combined internal wall degreasing and cleaning device and a method of using a long-distance conveying pipeline are provided.

[0007] This combined internal wall degreasing and cleaning device for long-distance pipelines includes a cleaning assembly and a power supply assembly. The cleaning assembly includes a first pipeline cleaner, a second pipeline cleaner, two universal joints, a main shaft, an ultrasonic transducer, and a partition. The first pig is connected to the main shaft via a universal joint. The main shaft has an internal cavity and the power supply unit is located inside the main shaft. The other end of the main shaft is connected to the partition via another universal joint. The second pig is located on one side of the partition, and the ultrasonic transducer is located on the main shaft. The outer periphery of the partition is covered with an elastomer. The end of the partition near the main shaft, the end of the first pipe cleaner near the main shaft, and the inner wall of the pipe to be cleaned form a first receiving space, which contains degreasing liquid.

[0008] Preferably, the second pipe cleaner, the baffle plate at one end close to each other, and the inner wall of the pipe to be cleaned form a second accommodating space. A cleaning section is provided in the second accommodating space, which is used to assist in cleaning the inner wall of the pipe to be cleaned after ultrasonic cleaning.

[0009] Preferably, there are two power supply groups, with the other power supply group located inside the second cleaning device. The cleaning unit includes a motor, shaft, sliding sleeve, spline, and multiple sets of first support rods, mounting bases, cutter heads, and second support rods. The output end of the motor is rotatably connected to the end of the second pig, the output end of the motor is connected to the shaft, the shaft is rotatably connected to the partition, the shaft is rotatably connected to the first support rod, the end of the first support rod is fixedly connected to the mounting base, the cutting head is connected to the mounting base, the second support rod is rotatably connected to the middle of the first support rod, and multiple sets of the second support rods are rotatably connected to the sliding sleeve. The sliding sleeve is slidably connected to the shaft through the spline connected to the shaft.

[0010] Preferably, it also includes a first linkage mechanism, a second linkage mechanism, and a connecting component; The first linkage mechanism, the second linkage mechanism, and the connecting assembly are used to drive the sliding sleeve to move toward the partition and retract multiple sets of the cutter heads when the device passes through the bend of the pipe to be cleaned.

[0011] Preferably, the connecting assembly includes a fixing sleeve and a connecting plate; The fixed sleeve is rotatably connected to the sliding sleeve, the sliding sleeve is rotatable relative to the fixed sleeve, and the fixed sleeve is connected to the connecting plate.

[0012] Preferably, the first linkage mechanism includes an arc-shaped plate, a rod, a support, and a first spring; The inner side of the arc-shaped plate is connected to the connecting plate, the arc-shaped plate is slidably connected to the partition, the arc-shaped plate is connected to the support, the support is slidably connected to the rod, the rod is connected to the partition, the first spring is sleeved on the rod, and the two ends of the first spring are respectively connected to the support and the partition.

[0013] Preferably, the second linkage mechanism includes a connecting column, a first annular plate, multiple connecting rods, a second annular plate, and multiple contact plates; The arc-shaped plate is connected to the first annular plate via the connecting column. The first annular plate is connected to the multiple contact plates via multiple connecting rods. The multiple contact plates are in contact with the end of the second annular plate away from the partition. The second annular plate is connected to the main shaft.

[0014] Preferably, when the spindle and the shaft body coincide, the contact surface of the contact plate is in parallel contact with the end face of the second annular plate; When the spindle and the shaft axis do not coincide, the contact surface of the contact plate and the end face of the second annular plate are no longer in parallel contact; compared to when the contact surface of the contact plate and the end face of the second annular plate are in parallel contact, one of the contact plates contacts the second annular plate and causes the arc plate to move closer to the spindle.

[0015] In a second aspect of the invention, a method of using a combined internal wall degreasing and cleaning device for long-distance transport pipelines is provided.

[0016] The method includes: S1, the device is placed into the pipe to be cleaned, so that the first pipe cleaner and the second pipe cleaner are in sealed contact with the inner wall of the pipe respectively, and the first receiving space is formed between the end of the partition plate near the main shaft, the end of the first pipe cleaner near the main shaft and the inner wall of the pipe, and degreasing liquid is injected into the first receiving space. S2, the driving device moves along the axial direction of the pipe to be cleaned, and at the same time the ultrasonic transducer is activated to generate a cavitation effect in the degreasing liquid in the first accommodating space, so as to perform ultrasonic degreasing treatment on the inner wall of the pipe. S3, when the device moves to the area corresponding to the second accommodating space, the motor is started to drive the shaft to rotate, and through the sliding sleeve, the first support rod and the second support rod, multiple sets of cutter heads are driven to open radially, so that the cutter heads are attached to the inner wall of the pipe for mechanical scraping and cleaning. S4, when the device passes through the bend of the pipe, the axis of the main shaft and the shaft body are offset, triggering the first linkage mechanism and the second linkage mechanism to drive the sliding sleeve to move towards the partition, causing multiple sets of cutter heads to retract inward. S5. After the device leaves the bent position, the sliding sleeve returns to its original position under the action of the first spring, and the multiple sets of cutter heads reopen to continue mechanical cleaning.

[0017] Preferably, in step S4, when the spindle and the shaft axis do not coincide, one of the contact plates in the second linkage mechanism contacts the second annular plate and pushes the first annular plate to deflect, thereby driving the arc plate to move closer to the spindle through the connecting column. The arc plate drives the sliding sleeve to move axially through the connecting plate, thereby realizing the retraction of the cutter head.

[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages: This invention provides a combined internal wall degreasing and cleaning device and method for long-distance pipelines. The device forms a first accommodating space by enclosing a first cleaning device, a baffle, and the inner wall of the pipeline to be cleaned. Degreasing fluid is placed within this space. An ultrasonic transducer is mounted on the main shaft, concentrating the ultrasonic action within a locally enclosed area. This effectively improves the utilization efficiency of the degreasing fluid and the intensity of ultrasonic cavitation, enhancing the removal effect on the grease-adhered layer. The baffle's outer periphery is covered with an elastomer structure, enabling a reliable seal with pipeline inner walls of different diameters or with certain tolerances, improving the stability of the first accommodating space and reducing degreasing fluid leakage.

[0019] Meanwhile, by incorporating a power supply unit within the main shaft, the ultrasonic transducer achieves an independent power supply system, eliminating the need for complex external cables and enhancing the stability and safety of the device during operation within long-distance pipelines. The first pig is connected to the main shaft via a universal joint, as is the connection between the main shaft and the partition plate, giving the device a degree of attitude self-adaptation capability. This helps maintain structural integrity and operational continuity in curved pipe sections. In summary, this device can create an efficient and stable localized degreasing environment within long-distance pipelines, improving degreasing and cleaning efficiency, reducing maintenance difficulty, and making it suitable for pipeline interior cleaning operations under complex conditions.

[0020] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0021] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 A three-dimensional connection structure diagram of a combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to an embodiment of the present invention is shown; Figure 2 An exploded view of a combined internal wall degreasing and cleaning device for long-distance conveying pipelines according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the planar connection structure of a combined inner wall degreasing and cleaning device for a long-distance conveying pipeline according to an embodiment of the present invention is shown. Figure 4 A cross-sectional view of a combined internal wall degreasing and cleaning device for long-distance conveying pipelines according to an embodiment of the present invention is shown; Figure 5 A partial cross-sectional view of a combined internal wall degreasing and cleaning device for long-distance conveying pipelines according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the connection structure of the first linkage mechanism of a combined inner wall degreasing and cleaning device for a long-distance conveying pipeline according to an embodiment of the present invention is shown. Figure 7 A schematic diagram of the connection structure of the second linkage mechanism of the combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to an embodiment of the present invention is shown. Figure 8 A schematic diagram of the connection structure of the cleaning section of a combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to an embodiment of the present invention is shown. Figure 9 A schematic diagram of the connection structure of the first linkage mechanism of a combined inner wall degreasing and cleaning device for a long-distance conveying pipeline according to an embodiment of the present invention is shown. Figure 10 A flowchart illustrating the method of using a combined internal wall degreasing and cleaning device for long-distance transport pipelines according to an embodiment of the present invention is shown.

[0022] The attached figures are labeled as follows: 1-Cleaning component, 11-First pig, 12-Ultrasonic transducer, 13-Second pig, 14-Universal joint, 15-Main shaft, 16-First accommodating space, 17-Second accommodating space, 18-Baffle, 2-Cleaning section, 21-Motor, 22-Shaft, 23-First support rod, 24-Mounting base, 25-Cutter head, 26-Second support rod, 27-Spline, 28-Sliding sleeve, 3-First linkage mechanism, 31-Arc plate, 32-Rod body, 33-First spring, 34-Support, 4-Connecting component, 41-Connecting rod, 42-Blocking, 43-Second spring, 44-Piston, 45-Addition pipe, 46-One-way valve, 47-Connecting plate, 48-Fixing sleeve, 5-Second linkage mechanism, 51-First annular plate, 52-Connecting rod, 53-Connecting column, 54-Contact plate, 55-Second annular plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Furthermore, the term "and / or" in this article only describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects are in an "or" relationship.

[0025] like Figures 1 to 9 As shown, the combined internal wall degreasing and cleaning device for long-distance pipeline includes a cleaning assembly 1 and a power supply assembly. The cleaning assembly 1 includes a first pipeline cleaner 11, a second pipeline cleaner 13, two universal joints 14, a main shaft 15, an ultrasonic transducer 12, and a partition 18. The first pipeline cleaner 11 is connected to the main shaft 15 through a universal joint 14. The main shaft 15 has an internal cavity and the power supply assembly is located inside the main shaft 15 to supply power to the ultrasonic transducer 12. The other end of the main shaft 15 is connected to the partition 18 through another universal joint 14. The second pipeline cleaner 13 is provided on one side of the partition 18, and the ultrasonic transducer 12 is fixedly installed on the outer circumferential surface of the main shaft 15. The outer circumferential surface of the partition 18 is covered with an elastomer to form a sealing fit with the inner wall of the pipeline to be cleaned.

[0026] The first receiving space 16 is formed by the partition 18 near the main shaft 15, the first cleaning device 11 near the main shaft 15, and the inner wall of the pipe to be cleaned. The first receiving space 16 contains degreasing liquid. The second cleaning device 13, the partition 18 near each other, and the inner wall of the pipe to be cleaned form a second receiving space 17. The second receiving space 17 is provided with a cleaning part 2, which is used to mechanically assist in cleaning the inner wall of the pipe to be cleaned after ultrasonic cleaning.

[0027] There are two power supply groups. The other power supply group is located inside the second pig 13 and is used to provide power to the motor 21. The cleaning unit 2 includes a motor 21, a shaft 22, a sliding sleeve 28, a spline 27, and multiple sets of first support rods 23, mounting bases 24, cutter heads 25, and second support rods 26. The motor 21 is located inside the second pig 13, and its output end is connected to the shaft 22. The shaft 22 is rotatably connected to the partition plate 18 and the first support rod 23. The end of the first support rod 23 is fixed to the mounting base 24, and the cutter head 25 is connected to the mounting base 24. The middle part of the first support rod 23 is rotatably connected to the second support rod 26, and multiple sets of second support rods 26 are rotatably connected to the sliding sleeve 28. The sliding sleeve 28 is slidably connected to the shaft 22 through the spline 27 connected to the shaft 22, so that the sliding sleeve 28 can rotate synchronously with the shaft 22 and move axially relative to the shaft 22.

[0028] In actual use, the device moves axially along the pipeline to be cleaned under traction or fluid propulsion. The first pig 11 and the second pig 13 form interference contact with the inner wall of the pipeline, thereby creating a closed area in the axial direction for the first receiving space 16 and the second receiving space 17. Degreasing fluid is pre-injected into the first receiving space 16, and under the sealing effect of the elastic covering structure on the outer periphery of the partition 18, the degreasing fluid is basically confined within the first receiving space 16. The ultrasonic transducer 12 on the main shaft 15 operates under the power supply of the power supply group, causing the degreasing fluid in the first receiving space 16 to generate high-frequency vibration and form a cavitation effect. The cavitation bubbles break near the inner wall of the pipeline, generating micro-jet impacts, thereby loosening, separating, and initially degreasing the oil stains adhering to the inner wall of the pipeline. As the device continues to move forward, the ultrasonically treated pipe section enters the area of ​​the second receiving space 17.

[0029] Motor 21 starts and drives shaft 22 to rotate around its own axis. Since the sliding sleeve 28 is slidably connected to shaft 22 via spline 27, the sliding sleeve 28 rotates synchronously with shaft 22. When the sliding sleeve 28 is in a position away from partition 18, multiple sets of second support rods 26 push the first support rod 23 outward, causing the cutter head 25 to open radially and press against the inner wall of the pipe. As shaft 22 continues to rotate, the cutter head 25 performs scraping operations along the inner wall of the pipe, further removing oil stains and residual impurities that have been loosened by ultrasound but not completely removed. The scraped-off impurities move forward with the entire device under the obstruction and pushing action of the second cleaning device 13, thereby achieving continuous coordination between ultrasonic cleaning and mechanical cleaning.

[0030] In this embodiment, a first linkage mechanism 3, a second linkage mechanism 5, and a connecting assembly 4 are also included. The first linkage mechanism 3, the second linkage mechanism 5, and the connecting assembly 4 are used to drive the sliding sleeve 28 to move towards the partition 18 and retract multiple sets of cutter heads 25 when the device passes through the bend of the pipe to be cleaned. The connecting assembly 4 includes a fixed sleeve 48 and a connecting plate 47. The fixed sleeve 48 is rotatably connected to the sliding sleeve 28, so that the sliding sleeve 28 can rotate relative to the fixed sleeve 48 but cannot be axially separated. The fixed sleeve 48 is fixedly connected to the connecting plate 47, so that the axial movement of the connecting plate 47 drives the sliding sleeve 28 to move synchronously.

[0031] The first linkage mechanism 3 includes an arc-shaped plate 31, a rod 32, a support 34, and a first spring 33. The inner side of the arc-shaped plate 31 is connected to the connecting plate 47, the arc-shaped plate 31 is slidably connected to the partition 18, the arc-shaped plate 31 is connected to the support 34, the support 34 is slidably connected to the rod 32, the rod 32 is fixedly connected to the partition 18, and the first spring 33 is sleeved on the rod 32. The two ends of the first spring 33 are respectively connected to the support 34 and the partition 18, and are used to provide a restoring elastic force to the arc-shaped plate 31.

[0032] The second linkage mechanism 5 includes a connecting column 53, a first annular plate 51, multiple connecting rods 52, a second annular plate 55, and multiple contact plates 54. The arc-shaped plate 31 is connected to the first annular plate 51 via the connecting column 53. The first annular plate 51 is connected to multiple contact plates 54 via multiple connecting rods 52. The multiple contact plates 54 are in contact with the end of the second annular plate 55 away from the partition 18. The second annular plate 55 is connected to the main shaft 15. When the main shaft 15 and the shaft body 22 are aligned, the contact surface of the contact plate 54 is in parallel contact with the end face of the second annular plate 55, and the force on each contact plate is balanced. When the main shaft 15 and the shaft body 22 are not aligned, the contact surface of the contact plate 54 is no longer in parallel contact with the end face of the second annular plate 55. At least one contact plate 54 experiences increased force and pushes the first annular plate 51 to shift, thereby causing the arc-shaped plate 31 to move closer to the main shaft 15.

[0033] In actual use, when the device operates on a straight pipe section, the axes of the main shaft 15 and the shaft body 22 are basically coincident, the contact plates 54 are subjected to balanced forces, the first spring 33 is in its natural state, the arc plate 31 remains in its original position, the sliding sleeve 28 remains in a position away from the partition 18, and the multiple sets of cutter heads 25 are in an open state and continuously perform mechanical cleaning. When the device enters a curved pipe section, due to the deflection of the universal joint 14, the main shaft 15 is offset relative to the shaft body 22, and the force on the contact plates 54 in the second linkage mechanism 5 changes. One side of the contact plate 54 experiences increased force and pushes the first annular plate 51 to shift, causing the arc plate 31 to overcome the elastic force of the first spring 33 and move towards the main shaft 15. The arc plate 31 drives the fixed sleeve 48 and the sliding sleeve 28 to move towards the partition 18 through the connecting plate 47, causing the multiple sets of second support rods 26 to drive the first support rod 23 to retract inward, and the cutter head 25 to detach from the inner wall of the pipe and retract, thereby avoiding jamming or abnormal wear of the cutter head 25 in the curved pipe section. After the device leaves the curved pipe section, under the elastic force of the first spring 33, all components reset, the sliding sleeve 28 moves away from the partition 18 again, and the cutter head 25 opens again, restoring the mechanical cleaning state.

[0034] In this embodiment, the connecting assembly 4 further includes a piston 44, a filling tube 45, a one-way valve 46, a connecting rod 41, a plug 42, and a second spring 43; the connecting plate 47 is slidably connected to the connecting rod 41, the connecting rod 41 is connected to the plug 42, the second spring 43 is sleeved on the connecting rod 41, and the two ends of the second spring 43 are respectively connected to the plug 42 and the connecting plate 47; the connecting rod 41 is connected to the piston 44, the piston 44 is slidably connected to the inner wall of the filling tube 45, the filling tube 45 is connected to the partition plate 18, and one end of the filling tube 45 is connected to the one-way valve 46; a filling pipe is provided on the filling tube 45, and the filling pipe is used to pre-add a certain amount of degreasing liquid into the filling tube 45; the outlet of the one-way valve 46 faces the first receiving space 16.

[0035] During a complete cleaning operation, the amount of degreasing liquid pre-filled in the filling pipe 45 is a preset constant amount. This degreasing liquid is not continuously replenished to the first containment space 16 during normal straight pipe operation, but is transferred only when a specific structural action is triggered.

[0036] In actual use, when the device enters the curved pipe section and triggers the arc plate 31 to move the connecting plate 47 towards the main shaft 15, the connecting rod 41 simultaneously pushes the piston 44 within the filling pipe 45 towards the one-way valve 46, causing some of the degreasing fluid in the filling pipe 45 to be forced into the first receiving space 16 through the one-way valve 46. This fluid replenishment process is mainly used to compensate for the small amount of degreasing fluid lost during operation due to minor leakage at the valve connection or changes in the position and posture of the curved pipe. When the device returns to the straight pipe section state, the arc plate 31 resets under the action of the first spring 33, and the connecting plate 47 returns to its original position. At this time, under the elastic action of the second spring 43, the connecting rod 41 and the piston 44 return to their original positions simultaneously. The purpose of the second spring 43 is not to continuously pump and replenish fluid, but to provide a flexible buffer and stroke release function for the connecting plate 47, so that the piston 44 can elastically retract when the first receiving space 16 does not need to be replenished with degreasing fluid, thereby avoiding rigid jamming or sticking of the mechanism due to incompressible liquid or valve not being opened.

[0037] Therefore, it is worth adding that the second spring 43 serves the following technical function: Firstly, it provides the return and reset force for piston 44; Secondly, when there is no need for replenishment, an elastic buffer zone is formed to absorb the reciprocating stroke of the arc plate 31, thus avoiding rigid constraints between the connecting rod 41 and the piston 44. Third, it ensures that after the fluid replenishment action is triggered in the bend section, the mechanism can be smoothly reset without affecting the retraction and extension of the sliding sleeve 28.

[0038] Throughout the cleaning process, the loss of degreasing fluid in the first containment space 16 mainly occurs as minor leaks at the connections between the pipes to be cleaned and monitoring elements such as valves, as well as localized fluid transfer caused by changes in posture when the device passes through curved pipe sections, rather than continuous loss. Through the above structural design, the fluid replenishment action and the pipe bending and retraction action are synchronized, ensuring that the fluid volume in the first containment space 16 remains within an effective range during long-distance operation, while also preventing excessive fluid replenishment or hydraulic jamming from affecting the normal operation of the mechanism.

[0039] Through the above structure and working process, this device achieves coordinated cleaning of ultrasonic degreasing and rotary scraping in straight pipe sections, and realizes automatic retraction of the cutter head and limited liquid replenishment in curved pipe sections. The second spring 43 realizes the mechanism buffer and anti-jamming functions, thus making it suitable for continuous inner wall degreasing and cleaning operations of long-distance, multi-curved conveying pipelines.

[0040] like Figure 10 As shown, another embodiment of the present invention also provides a method for using a combined internal wall degreasing and cleaning device for long-distance conveying pipelines, comprising the following steps: S1, the device is inserted into the pipe from one end of the pipe to be cleaned, so that the first pipe cleaner 11 and the second pipe cleaner 13 form a circumferential sealing fit with the inner wall of the pipe respectively; a first receiving space 16 is formed between the end of the partition plate 18 near the main shaft 15, the end of the first pipe cleaner 11 near the main shaft 15 and the inner wall of the pipe; degreasing liquid is injected into the first receiving space 16, so that the degreasing liquid forms a relatively closed liquid cleaning area in the first receiving space 16.

[0041] S2, drive the device to move along the axial direction of the pipe to be cleaned, and at the same time activate the ultrasonic transducer 12 to make the degreasing liquid in the first accommodating space 16 generate high-frequency vibration and form a cavitation effect; the cavitation bubbles break near the inner wall of the pipe to generate micro-jet impact, thereby loosening and peeling off the oil stains attached to the inner wall of the pipe, realizing ultrasonic degreasing treatment of the inner wall of the pipe; as the device continues to move forward, the pipe section that has been ultrasonically treated gradually enters the corresponding area of ​​the second accommodating space 17.

[0042] S3, when the device moves to the area corresponding to the second accommodating space 17, the motor 21 is started to drive the shaft 22 to rotate around its own axis; the sliding sleeve 28 is slidably connected to the shaft 22 through the spline 27 and rotates synchronously. When the sliding sleeve 28 is in a position away from the partition 18, multiple sets of second support rods 26 push the first support rod 23 to swing outward, so that multiple sets of cutter heads 25 open radially and come into contact with the inner wall of the pipe; during the rotation of the shaft 22, the cutter heads 25 scrape and clean the residual oil stains loosened by ultrasound, thereby achieving mechanically assisted degreasing.

[0043] S4, when the device passes through the bend in the pipeline, the first pig 11 and the second pig 13 are constrained by the bend in the pipeline and their postures deflect, causing the main shaft 15 to deviate from the axis of the shaft body 22. When the main shaft 15 and the shaft body 22 are not aligned, the first linkage mechanism 3 and the second linkage mechanism 5 are triggered to move, driving the sliding sleeve 28 to move closer to the partition 18, causing the multiple sets of cutter heads 25 to retract inward and disengage from the inner wall of the pipeline, so as to avoid the cutter heads 25 from getting stuck or abnormally worn at the bend.

[0044] Specifically, when the spindle 15 and the shaft 22 are not aligned, the contact state between at least one contact plate 54 in the second linkage mechanism 5 and the second annular plate 55 changes, the contact plate 54 experiences increased force and pushes the first annular plate 51 to shift; the first annular plate 51 drives the arc plate 31 to move closer to the spindle 15 via the connecting column 53; the arc plate 31 drives the sliding sleeve 28 to move axially closer to the partition plate 18 via the connecting plate 47, thereby causing multiple sets of first support rods 23 and second support rods 26 to retract in conjunction, realizing the automatic retraction of the cutter head 25.

[0045] S5, after the device leaves the bent position, the axis of the main shaft 15 and the axis of the shaft 22 gradually return to coincide. Under the elastic action of the first spring 33, the arc plate 31 resets and drives the sliding sleeve 28 to move away from the partition 18. The multiple sets of cutter heads 25 reopen radially and stick to the inner wall of the pipe to continue mechanical scraping and cleaning.

[0046] In step S2, the driving device can be driven by compressed air. By introducing compressed air into the pipe, the device is pushed forward along the inner wall of the pipe to be cleaned, thereby completing the cleaning work at different locations of the pipe.

[0047] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A combined internal wall degreasing and cleaning device for long-distance conveying pipelines, characterized in that, It includes a cleaning assembly (1) and a power supply group. The cleaning assembly (1) includes a first pig (11), a second pig (13), two universal joints (14), a spindle (15), an ultrasonic transducer (12), and a partition (18). The first pig (11) is connected to the main shaft (15) through a universal joint (14). The main shaft (15) has a cavity inside and the power supply group is located inside the main shaft (15). The other end of the main shaft (15) is connected to the partition (18) through another universal joint (14). The second pig (13) is located on one side of the partition (18). The ultrasonic transducer (12) is located on the main shaft (15). The outer periphery of the partition (18) is covered with an elastomer. The partition (18) near one end of the main shaft (15), the first pipe cleaner (11) near one end of the main shaft (15), and the inner wall of the pipe to be cleaned form a first accommodating space (16). The first accommodating space (16) contains degreasing liquid.

2. The combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to claim 1, characterized in that, The second pipe cleaner (13), the partition (18) and the inner wall of the pipe to be cleaned are close to each other to form a second accommodating space (17). A cleaning part (2) is provided in the second accommodating space (17). The cleaning part (2) is used to assist in cleaning the inner wall of the pipe to be cleaned after ultrasonic cleaning.

3. The combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to claim 2, characterized in that, The number of power supply groups is two, and the other power supply group is located inside the second cleaning device (13). The cleaning part (2) includes a motor (21), a shaft (22), a sliding sleeve (28) and a spline (27), as well as multiple sets of first support rods (23), mounting bases (24), cutter heads (25) and second support rods (26). The output end of the motor (21) is rotatably connected to the end of the second pig (13). The output end of the motor (21) is connected to the shaft (22). The shaft (22) is rotatably connected to the partition (18). The shaft (22) is rotatably connected to the first support rod (23). The end of the first support rod (23) is fixedly connected to the mounting base (24). The blade (25) is connected to the mounting base (24). The second support rod (26) is rotatably connected to the middle part of the first support rod (23). Multiple sets of second support rods (26) are rotatably connected to the sliding sleeve (28). The sliding sleeve (28) is slidably connected to the shaft (22) through the spline (27) connected to the shaft (22).

4. The combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to claim 3, characterized in that, It also includes a first linkage mechanism (3), a second linkage mechanism (5), and a connecting component (4); The first linkage mechanism (3), the second linkage mechanism (5) and the connecting assembly (4) are used to drive the sliding sleeve (28) to move toward the partition (18) and retract multiple sets of the cutter heads (25) when the device passes through the bend of the pipe to be cleaned.

5. The combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to claim 4, characterized in that, The connecting component (4) includes a fixing sleeve (48) and a connecting plate (47). The fixed sleeve (48) is rotatably connected to the sliding sleeve (28), the sliding sleeve (28) is rotatable relative to the fixed sleeve (48), and the fixed sleeve (48) is connected to the connecting plate (47).

6. The combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to claim 4, characterized in that, The first linkage mechanism (3) includes an arc plate (31), a rod (32), a support (34) and a first spring (33); The inner side of the arc plate (31) is connected to the connecting plate (47), the arc plate (31) is slidably connected to the partition plate (18), the arc plate (31) is connected to the support (34), the support (34) is slidably connected to the rod (32), the rod (32) is connected to the partition plate (18), the first spring (33) is sleeved on the rod (32), and the two ends of the first spring (33) are respectively connected to the support (34) and the partition plate (18).

7. The combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to claim 6, characterized in that, The second linkage mechanism (5) includes a connecting column (53), a first annular plate (51), multiple connecting rods (52), a second annular plate (55), and multiple contact plates (54); The arc plate (31) is connected to the first annular plate (51) through the connecting column (53). The first annular plate (51) is connected to the multiple contact plates (54) through multiple connecting rods (52). The multiple contact plates (54) are in contact with the end of the second annular plate (55) away from the partition (18). The second annular plate (55) is connected to the main shaft (15).

8. The combined inner wall degreasing and cleaning device for long-distance conveying pipelines according to claim 7, characterized in that, When the spindle (15) coincides with the axis of the shaft (22), the contact surface of the contact plate (54) is in parallel contact with the end face of the second annular plate (55); When the spindle (15) and the shaft body (22) are not aligned, the contact surface of the contact plate (54) is no longer in parallel contact with the end face of the second annular plate (55); compared to when the contact surface of the contact plate (54) is in parallel contact with the end face of the second annular plate (55), one of the contact plates (54) contacts the second annular plate (55) and causes the arc plate (31) to move closer to the spindle (15).

9. A combined method for degreasing and cleaning the inner wall of long-distance transport pipelines, characterized in that, The method includes the combined internal wall degreasing and cleaning device for long-distance conveying pipelines as described in any one of claims 1 to 8, comprising the following steps: S1, the device is placed into the pipe to be cleaned, so that the first pipe cleaner (11) and the second pipe cleaner (13) are in sealed contact with the inner wall of the pipe respectively, and the first receiving space (16) is formed between the end of the partition plate (18) near the main shaft (15), the end of the first pipe cleaner (11) near the main shaft (15) and the inner wall of the pipe, and degreasing liquid is injected into the first receiving space (16); S2, the driving device moves along the axial direction of the pipe to be cleaned, and at the same time starts the ultrasonic transducer (12) to generate cavitation effect in the degreasing liquid in the first accommodating space (16) to perform ultrasonic degreasing treatment on the inner wall of the pipe. S3, when the device moves to the area corresponding to the second accommodating space (17), the motor (21) is started, the shaft (22) is driven to rotate, and multiple sets of cutter heads (25) are driven to open radially through the sliding sleeve (28), the first support rod (23) and the second support rod (26), so that the cutter heads (25) are attached to the inner wall of the pipe for mechanical scraping and cleaning; S4, when the device passes through the bend of the pipe, the axis of the main shaft (15) and the shaft body (22) are offset, triggering the first linkage mechanism (3) and the second linkage mechanism (5) to move the sliding sleeve (28) towards the direction of the partition (18), causing multiple sets of cutter heads (25) to retract inward; S5, after the device leaves the bent position, the sliding sleeve (28) is reset under the action of the first spring (33), and the multiple sets of cutter heads (25) reopen to continue mechanical cleaning.

10. The combined inner wall degreasing and cleaning method for long-distance conveying pipelines according to claim 9, characterized in that: In step S4, when the spindle (15) and the shaft body (22) do not coincide, one of the contact plates (54) in the second linkage mechanism (5) contacts the second annular plate (55) and pushes the first annular plate (51) to shift. Then, through the connecting column (53), the arc plate (31) moves towards the spindle (15). The arc plate (31) drives the sliding sleeve (28) to move axially through the connecting plate (47), thereby realizing the retraction of the cutter head (25).

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