Rotary jet pipe cleaner

Abstract

The utility model relates to the field of cleaning devices matched with the cross section of a pipeline, in particular to a rotary jet pipe cleaner. The rotary jet pipe cleaner is used for solving the problems that in the prior art, a nozzle extends outwards in the radial direction of a rotary drum, the nozzle interferes with thick dirt in a pipeline when rotating, and the nozzle is damaged. The rotary spraying pipe cleaner comprises a pipeline scraping mechanism and a rotary spraying mechanism, inner cavities of the pipeline scraping mechanism and the rotary spraying mechanism are communicated, the rotary spraying mechanism comprises a hollow mandrel fixedly installed at the front end of the pipeline scraping mechanism, the hollow mandrel is sleeved with a rotating sleeve, and a spraying hole extending from inside to outside is formed in the rotating sleeve. A certain included angle is formed between the extending direction of the spraying hole and the diameter direction of the rotating sleeve, and an inner cavity of the spraying hole is communicated with an inner cavity of the hollow mandrel, so that the spraying hole rotates around the axis of the hollow mandrel for spraying when fluid enters the inner cavity of the spraying hole. And the spraying hole is formed in the rotating sleeve, so that the rotary spraying mechanism does not have an extending cantilever structure and cannot interfere with dirt in a pipeline during rotation, and the damage risk is reduced.

Description

Technical Field

[0001] The utility model relates to the field of cleaning devices matched with pipeline cross sections, in particular to a rotary jet pipe cleaner. Background Art

[0002] As the main mode of oil and gas gathering and transportation, pipeline transportation has the characteristics of high safety, low cost, and high transportation efficiency, and plays an important role in long-distance oil and gas transportation. With the increase of transportation cycle, there will be different degrees of dirt, liquid accumulation, medium precipitation and sulfur deposition in the transportation pipeline, which will cause pressure and flow fluctuations in the gathering and transportation process, causing a certain impact on the transportation pipeline and affecting the service life of the pipeline. In the low flow rate area of ​​the pipeline or when the temperature in the pipeline is low, dirt and impurities will be deposited on the inner wall of the pipeline, increasing the thickness of the dirt on the inner wall of the pipeline, and further strengthening the impact on oil and gas transportation. Therefore, it is necessary to carry out regular pipeline cleaning operations to remove the accumulated liquid, impurities and dirt in the pipeline.

[0003] For example, a Chinese invention patent with publication number CN110293104A discloses a rotary jet pipe cleaner, which includes a pipe scraping mechanism. The pipe scraping mechanism has a cylinder and a leather cup sleeved on the cylinder, the leather cup is used to scrape the inner wall of the pipe, and a rotary jet mechanism is installed in front of the pipe scraping mechanism. The rotary jet mechanism includes a rotating drum, which is axially fixed in front of the pipe scraping mechanism and can rotate along the axis of the rotating drum itself. Spiral uniformly distributed nozzles are installed in the direction of radial outward extension of the rotating drum. The inner cavity of the rotating drum, the inner cavity of the nozzle and the inner cavity of the pipe scraping mechanism are connected. When the fluid flows through the inner cavity of the pipe scraping mechanism and the inner cavity of the rotating drum and is ejected from the nozzle, the reaction of the fluid causes the rotating drum to rotate so that the nozzle rotates to clean and flush the dirt or impurities in the pipe. At the same time, when the fluid drives the rotary jet pipe cleaner forward, the pipe scraping mechanism can remove the sediment on the inner wall of the pipe. Among them, the nozzle is arranged outside the drum and extends radially outward along the drum. When the thickness of hard dirt and sticky dirt in the pipeline is large, the thick dirt will interfere with the rotating nozzle, bend the nozzle or even break it, affect the rotation of the nozzle, cause wear at the assembly of the drum and the pipeline scraping mechanism, affect the smooth operation of the rotary jet pipe cleaner, and reduce the service life of the rotary jet pipe cleaner. Utility Model Content

[0004] The utility model aims to provide a rotary jet pipe cleaner to solve the problem that the nozzle of the rotary jet pipe cleaner in the prior art extends radially outward along the rotating drum, and when the nozzle rotates, it interferes with thick dirt in the pipeline and damages the nozzle.

[0005] Based on the above technical problems, the utility model provides a rotary jet pipe cleaner, which includes a pipe scraping mechanism, a rotary jet mechanism is installed in front of the pipe scraping mechanism, and the inner cavity of the pipe scraping mechanism is connected to the inner cavity of the rotary jet mechanism. The rotary jet mechanism includes a hollow core shaft fixedly installed at the front end of the pipe scraping mechanism, and the hollow core shaft is provided with a rotating sleeve which is fixed in the axial direction of the hollow core shaft and can rotate around the axis of the hollow core shaft. A spray hole extending from the inside to the outside is opened in the rotating sleeve, and the extension direction of the spray hole forms a certain angle with the diameter direction of the rotating sleeve, and the inner cavity of the spray hole is connected to the inner cavity of the hollow core shaft, so that when the fluid flows through the inner cavity of the hollow core shaft into the inner cavity of the spray hole and is ejected through the spray hole, the rotating sleeve rotates and sprays around the axis of the hollow core shaft.

[0006] The utility model aims to improve the problem that the nozzle of the rotary jetting mechanism of the rotary jetting pipe cleaner in the prior art extends radially outward along the rotating drum, and when the nozzle rotates, it interferes with thick dirt in the pipeline, thereby damaging the nozzle. In the rotating sleeve of the rotary jetting mechanism, a jet hole is provided from the inside to the outside and forms a certain angle with the diameter direction of the rotating sleeve, so that the rotary jetting mechanism has no protruding cantilever structure, and when rotating, it will not interfere with thick dirt in the pipeline, thereby reducing the risk of damage to the rotary jetting mechanism and increasing the service life of the rotary jetting mechanism.

[0007] Furthermore, the rotating sleeve is provided with limiting members on both the front and rear sides to fix the rotating sleeve at a corresponding position in the axial direction of the hollow core shaft, and the limiting member in front of the rotating sleeve is a conical guide body.

[0008] Furthermore, the guide body and the hollow core shaft are detachably connected.

[0009] Furthermore, the guide body is a solid cone.

[0010] Furthermore, the guide body is provided with a threaded blind hole, and is connected to the hollow core shaft through the threaded blind hole.

[0011] Furthermore, the front end of the hollow core shaft is a sealing structure.

[0012] Furthermore, the diameter of the large end of the guide body is not less than the diameter of the rotating sleeve.

[0013] Furthermore, the hollow core shaft is provided with a guide hole at an axial position corresponding to the injection hole, and an annular groove is provided on the outer side so that the fluid can flow from the inner cavity of the hollow core shaft into the inner cavity of the injection hole.

[0014] Furthermore, the hollow core shaft is threadedly connected to the tubular bracket, and the limiting member on the rear side of the rotating sleeve is a limiting sleeve sleeved on the outside of the hollow core shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a rotary jet pipe cleaner of the utility model;

[0016] Figure 2 This is a schematic structural diagram of a hollow core shaft of a rotary jet pipe cleaner of the utility model;

[0017] Figure 3 The utility model is a structural schematic diagram of a rotating sleeve and a spray hole of a rotary spray pipe cleaning device.

[0018] In the figure: 1. rotary injection mechanism, 11. guide body, 12. hollow core shaft, 121. ring groove, 122. guide hole, 123. inner cavity of hollow core shaft, 13. rotating sleeve, 131. injection hole, 132. inner surface, 2. pipe scraping mechanism, 21. tubular bracket, 22. bolt 23. nut, 24. left baffle, 25. left guide plate, 26. spacer ring, 27. sealing plate, 28. right guide plate, 29. tubular bracket guide hole, 210. tubular bracket inner cavity, 3. adjustment sleeve. DETAILED DESCRIPTION

[0019] The prior art discloses a rotary jet pipe cleaner, which includes a pipe scraping mechanism and a rotary jet mechanism. The pipe scraping mechanism has a cylinder, on which a leather cup is sleeved for scraping the inner wall of the pipe. A rotary jet mechanism is installed in front of the cylinder of the pipe scraping mechanism. The rotary jet mechanism includes a rotating drum, which is axially fixed in front of the cylinder of the pipe scraping mechanism and can rotate circumferentially. Spiral uniformly distributed nozzles are installed in the direction in which the rotating drum extends radially outward. The inner cavity of the rotating drum, the inner cavity of the nozzle and the inner cavity of the pipe scraping mechanism are connected, so that when the fluid flows through the inner cavity of the rotating drum and is ejected from the nozzle, the nozzle rotates to clean and flush the dirt or impurities in the pipe. At the same time, when the fluid pushes the rotary jet pipe cleaner forward, the leather cup of the pipe scraping mechanism can remove the sediment on the inner wall of the pipe. Among them, the nozzle is arranged outside the drum and extends radially outward along the drum. When the thickness of hard dirt and sticky dirt in the pipeline is large, the thick dirt will interfere with the rotating nozzle, bend the nozzle or even break it, affect the rotation of the nozzle, cause wear at the assembly of the drum and the pipeline scraping mechanism, affect the smooth operation of the rotary jet pipe cleaner, and reduce the service life of the rotary jet pipe cleaner.

[0020] The utility model proposes a technical solution to the problems existing in the above technical solutions. The core concept of the utility model is to rotatably mount a rotating sleeve on the outer side of a hollow core shaft connected to a pipe scraping mechanism. The rotating sleeve has a certain thickness and a spray hole extending from the inside to the outside is provided in the rotating sleeve. The extension direction of the spray hole forms a certain angle with the diameter direction of the rotating sleeve, and the inner cavity of the spray hole is connected with the inner cavity of the hollow core shaft, so that when the fluid flows through the inner cavity of the hollow core shaft and enters the inner cavity of the spray hole, a certain torque is generated on the rotating sleeve, so that the spray hole in the rotating sleeve rotates around the axis of the hollow core shaft to spray. With such an arrangement, the rotary spraying mechanism has no protruding cantilever structure, and when the rotating sleeve rotates, the spray hole will not interfere with thicker dirt in the pipe, thereby reducing the risk of damage to the rotary spraying mechanism and increasing the service life of the rotary spraying mechanism.

[0021] Based on the above utility model concept, a rotary jetting pipe cleaning device of the utility model includes: Figure 1 The pipe scraping mechanism 2 shown in the figure comprises a tubular support 21, on which a sealing disc 27 is sleeved for scraping the pipe. A rotary jetting mechanism 1 is installed in front of the tubular scraping pipe 2, and the inner cavity of the pipe scraping mechanism is connected to the inner cavity of the rotary jetting mechanism. The rotary jetting mechanism 1 comprises a hollow core shaft 12, and the inner cavity 123 of the hollow core shaft is connected to the inner cavity 210 of the tubular support. A rotating sleeve 13 is sleeved on the hollow core shaft 12, which is fixed in the axial direction of the hollow core shaft 12 and can rotate around the axis of the hollow core shaft, and a rotating sleeve 13 is provided in the rotating sleeve 13 as shown in FIG. Figure 3The spray hole 131 shown from the inside to the outside, the extension direction of the spray hole 131 forms a certain angle with the diameter direction of the rotating sleeve, and the inner cavity of the spray hole is connected with the inner cavity 123 of the hollow core shaft, so that when the fluid flows through the inner cavity 123 of the hollow core shaft into the inner cavity of the spray hole 131, the spray hole in the rotating sleeve rotates around the axis of the hollow core shaft and sprays. The rotating sleeve 13 of this embodiment is directly sleeved on the hollow core shaft 12, and the gap between the rotating sleeve 13 and the hollow core shaft 12 is small, so that the coaxiality of the two is high, the hollow core shaft 12 can rotate smoothly, and the sealing between the two is guaranteed. In other embodiments, bearings can be installed on the hollow core shaft corresponding to the front and rear ends of the rotating sleeve, and a sealing device can be installed to ensure the sealing between the hollow core shaft and the rotating sleeve, and the rotating sleeve is installed on the bearing to realize the circumferential rotation of the rotating sleeve. In the present embodiment, a spray hole 131 extending from the inside to the outside is provided in the rotating sleeve, and the extension direction of the spray hole 131 forms a certain angle with the diameter direction of the rotating sleeve 13, so that when the fluid passes through the spray hole 131, a certain torque is generated on the rotating sleeve 13, so that the rotating sleeve 13 rotates and drives the spray hole 131 to rotate and spray. In addition, in other embodiments, a spray hole extending from the inside to the outside and from the back to the front can be provided in the rotating sleeve, so that the spray hole can flush the pipeline relatively in front during operation, avoiding the direct contact of the spray hole with the dirt in the pipeline, causing the wear and blockage of the spray hole. In the present embodiment, there are 3 spray holes and they are evenly distributed along the circumferential direction of the rotating sleeve 13, which can ensure that the spray hole 131 flushes the impurities and dirt in the pipeline in all directions, improves the spray efficiency of the spray hole 131, and at the same time, reduces the vibration of the rotary jet pipe cleaner during operation, and improves the stability during operation. In addition, it is easy to think that the spray holes on the rotating sleeve can also be set to other numbers, but in order to ensure the stability of the rotating sleeve during rotation, the number of spray holes is not less than 2 and is evenly distributed circumferentially.

[0022] When in use, the fluid flows into the inner cavity 210 of the tubular support, and flows into the inner cavity of the injection hole through the inner cavity 123 of the hollow core shaft that is connected to the inner cavity 210 of the tubular support. Since the extension direction of the injection hole 131 forms a certain angle with the diameter direction of the rotating sleeve, a certain torque will be generated on the rotating sleeve 13, so that the rotating sleeve 13 rotates to drive the injection hole 131 to rotate to perform spiral flushing on the pipeline. At the same time, under the thrust of the fluid, the rotary injection pipe cleaner moves forward, and the sealing disk 27 of the pipeline scraping mechanism 2 can scrape the inner wall of the pipeline. By opening the injection hole from the inside to the outside and forming a certain angle with the diameter direction of the rotating sleeve in the rotating sleeve, the rotary injection mechanism has no protruding cantilever structure, and will not interfere with the thicker dirt in the pipeline during rotation, reducing the risk of damage to the rotary injection mechanism and increasing the service life of the rotary injection mechanism.

[0023] In this embodiment, the front and rear sides of the rotating sleeve 13 are both equipped with limiting members to fix the rotating sleeve 13 at the corresponding position in the axial direction of the hollow core shaft 12, and the limiting member in front of the rotating sleeve is a conical guide body 11. Installing the conical guide body 11 in front of the rotating sleeve can make it easier for the rotary jet pipe cleaner to pass through the impurities or dirt in the pipeline, reducing the resistance of the rotary jet pipe cleaner in the process of moving forward. When there is thick hard dirt or sticky dirt in the pipeline, the conical guide body 11 can knock away the dirt to protect the rotating sleeve 13 behind it to avoid direct contact with the dirt and cause blockage and wear of the injection hole 131, thereby increasing the service life of the injection hole 131. The limiting member on the rear side of the rotating sleeve is the above-mentioned adjustment sleeve 3, and the limiting of the rotating sleeve 13 in the axial fixed position of the hollow core shaft 12 can be achieved through the guide body and the adjustment sleeve. In addition, in other embodiments, the limiting member in front of the rotating sleeve can also be set as a nut, and the nut thread is installed on the front end of the hollow core shaft to limit the rotating sleeve, or an elastic retaining ring can be installed in front of the rotating sleeve to limit the rotating sleeve. The guide body of this embodiment is conical, and in other embodiments, the front part of the guide body can also be set as a bullet head or a pyramid shape or a streamlined tip shape.

[0024] In this embodiment, the guide body 11 is detachably connected to the hollow core shaft 12. When the rotary jet pipe cleaner moves forward, the guide body 11 will contact with impurities and dirt in the pipeline, causing wear of the guide body. The detachable connection between the guide body 11 and the hollow core shaft 12 allows the guide body 11 to be replaced when the guide body 11 is worn, thereby ensuring the stability of the rotary jet pipe cleaner when moving forward. In addition, in other embodiments, to meet the needs, the guide body and the hollow core shaft can be integrated, for example, the guide body is bonded or welded to the hollow core shaft, or the guide body and the hollow core shaft are integrally cast.

[0025] In this embodiment, the guide body 11 is a solid cone. The solid guide body 11 has higher strength than the hollow guide body. When there is thick hard dirt or sticky dirt in the pipeline, the guide body 11 can be used to knock away the dirt to protect the injection hole behind it. At this time, the solid guide body 11 is not easy to deform and damage when colliding with the hard dirt in the pipeline, which prolongs the life of the guide body. In addition, in other embodiments, the guide body can also be designed as a hollow cone to reduce the weight of the guide body, as long as the guide body can knock away the dirt to avoid clogging of the injection hole behind it.

[0026] In this embodiment, the guide body 11 is provided with a threaded blind hole, and is connected to the hollow core shaft 12 through the threaded blind hole. The threaded connection ensures the reliability of the connection between the two, and also ensures the stability of the rotary jetting pipe cleaner when it moves forward. In addition, in other embodiments, a plug-in blind hole can also be provided on the guide body, and it can be connected to the hollow core shaft through the plug-in blind hole, and it is only necessary to ensure a reliable connection between the two.

[0027] In the present embodiment, the front end of the hollow mandrel 12 is a sealing structure. If the front end of the hollow mandrel 12 is a conducting structure, the fluid will impact the guide body 11 at the front end of the hollow mandrel 12, affecting the stability of the rotary jet pipe cleaner when it moves forward, and the guide body 11 and the hollow mandrel 12 are connected by threads, and the impact of the fluid for a long time may cause the connection between the hollow mandrel 12 and the guide body 11 to loosen. The front end of the hollow mandrel 12 of this implementation is a sealing structure, which avoids the impact of the fluid on the guide body 11 and ensures the stability of the rotary jet pipe cleaner when it moves forward. Of course, in other embodiments, the front end of the hollow mandrel can also be set as a conducting structure, as long as the reliability of the connection between the hollow mandrel and the guide body is met.

[0028] In this embodiment, the large end diameter of the guide body 11 is not less than the diameter of the rotating sleeve. When the large end diameter of the guide body is the same as the diameter of the rotating sleeve or when the large end diameter of the guide body is larger than the diameter of the rotating sleeve, the guide body 11 can knock away the dirt at the front of the rotary jetting pig and open up a certain space for the rear rotating sleeve 13, protecting the rear rotating sleeve 13 from direct contact with dirt and causing blockage and wear of the injection hole 131, thereby increasing the service life of the injection hole 131. In addition, in other embodiments, the large end diameter of the guide body can also be smaller than the diameter of the rotating sleeve to meet the needs.

[0029] In this embodiment, the hollow core shaft 12 is provided with a plurality of holes at the axial position corresponding to the injection hole 131 in the rotating sleeve. Figure 2 The guide hole 122 shown is provided with an annular groove 121 on the outside so that the fluid can flow from the inner cavity 123 of the hollow core shaft into the inner cavity of the injection hole. The inner surface 132 of the rotating sleeve 13 is adapted to the hollow core shaft 12 and is sleeved on the hollow core shaft. The injection hole 131 penetrating the hollow core shaft 12 cooperates with the annular groove 121 of the hollow core shaft. When the fluid flows from the inner cavity 123 of the hollow core shaft through the guide hole 122 and enters the annular groove 121, it flows into the injection hole 131 of the hollow core shaft through the annular groove 121. The guide hole 122 and the annular groove 121 are provided on the hollow core shaft, and are connected and matched with the injection hole 131 in the rotating sleeve 13 sleeved on the hollow core shaft so that the inner cavity of the injection hole 131 is connected with the inner cavity of the hollow core shaft. The structure is simple and can ensure that the rotating sleeve 13 rotates stably around the axis of the hollow core shaft. In addition, in other embodiments, a guide hole may be opened on the hollow core shaft, and an annular groove may be opened on the rotating sleeve at a position corresponding to the guide hole on the hollow core shaft, so that the fluid can flow through the guide hole of the hollow core shaft into the annular groove of the rotating sleeve and then into the inner cavity of the injection hole.

[0030] In this embodiment, the hollow core shaft 12 is threadedly connected to the tubular bracket 21, and the limiter on the rear side of the rotating sleeve is an adjustment sleeve 3 that is sleeved on the outside of the hollow core shaft 12. The outer peripheral surface of the hollow core shaft 12 is provided with an external threaded section, and the front and rear ends of the tubular bracket 21 are provided with tubular bracket guide holes 29 and the front end is provided with a threaded hole, and the hollow core shaft 12 is threadedly connected to the tubular bracket 21. The threaded connection ensures the sealing of the connection between the two mechanisms, avoids fluid leakage, and at the same time ensures the flexibility between the two mechanisms, so that it has the advantage of modularization, improves the flexibility between the rotary jetting pipe cleaner mechanisms, and during maintenance, only the damaged mechanism needs to be repaired, reducing maintenance costs. At the same time, the threaded connection structure allows the relative position of the hollow core shaft 12 and the tubular bracket 21 to be adjusted, thereby realizing the adjustment of the relative position of the rotary jetting mechanism 1 and the pipeline scraping mechanism 2, so that the two mechanisms can adapt to different pipeline diameters and environments. The adjustment sleeve 3 behind the rotating sleeve 13 can ensure the relative position of the components between the pipe scraping mechanism 2 and the rotary jetting mechanism 1 when adjusting the relative position, thereby avoiding the difficulty of the rotary jetting pipe cleaner to operate due to mismatch or misalignment between the mechanisms.

[0031] Since the pipeline scraping mechanism does not involve the improvement of the present utility model, the pipeline scraping mechanism can adopt the structure of the pipeline scraping mechanism in the comparative document. Of course, the structure of a pipeline scraping mechanism is also provided in the present embodiment, and the pipeline scraping mechanism 2 includes a tubular bracket 21, and a sealing disc 27 is sleeved on the tubular bracket 21 to scrape the pipeline. There is an interference fit between the sealing disc 27 and the pipeline. The interference amount of the sealing disc 27 is between 3% and 8%. Under the driving action of the fluid, the rotary jet pipe cleaner moves forward. The interference fit between the sealing disc 27 and the pipeline ensures the sealing of the rotary jet pipe cleaner during operation, avoids fluid leakage, and ensures the stable operation of the rotary jet pipe cleaner. At the same time, it enables it to scrape the dirt on the inner wall of the pipeline and the oil attached to the pipeline to a greater extent when moving forward, thereby improving the scraping effect of the pipeline scraping mechanism 2. The sealing disc 27 and the spacer ring 26 are spaced apart and distributed on the tubular support 21, and guide discs are installed in front and behind. The left guide disc 25 and the right guide disc 28 fit the inner wall of the pipeline so that the rotary jet pipe cleaner will not be offset when advancing in the pipeline, so that the rotary jet pipe cleaner can run smoothly along the pipeline, avoiding poor cleaning effect or equipment damage caused by offset. A connecting plate extending radially outward is provided at one end of the tubular support 21. The guide disc, the spacer ring 26 and the sealing disc 27 are fixed to the connecting plate on the tubular support 21 through the left baffle 24 and the bolts 22 and nuts 23, ensuring the connection reliability of the sealing disc 27 on the tubular support 21, so that the sealing disc 27 is more stable when scraping the inner wall of the pipeline. Among them, the sealing discs 27 are divided into two groups, each group of two is arranged on the left and right, and an adjustment sleeve 3 is installed between the two groups of sealing discs 27 to adjust the distance between the two groups of sealing discs 27. In addition, in other embodiments, two connecting plates extending radially outward may be provided in the middle of the tubular support, and the spaced sealing plates and spacer rings may be fixed to the connecting plates respectively by bolts, nuts and baffles. It is only necessary to fasten the sealing plates to the tubular support.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary jetting pipe cleaner, comprising a pipe scraping mechanism, a rotary jetting mechanism is installed at the front end of the pipe scraping mechanism, the inner cavity of the pipe scraping mechanism is connected to the inner cavity of the rotary jetting mechanism, and is characterized in that: The rotary injection mechanism comprises a hollow core shaft fixedly mounted on the front end of the pipe scraping mechanism, a rotating sleeve is sleeved on the hollow core shaft and is fixed in the axial direction of the hollow core shaft and can rotate around the axis of the hollow core shaft, a injection hole extending from the inside to the outside is opened in the rotating sleeve, the extension direction of the injection hole forms a certain angle with the diameter direction of the rotating sleeve, and the inner cavity of the injection hole is connected with the inner cavity of the hollow core shaft, so that when the fluid flows through the inner cavity of the hollow core shaft into the inner cavity of the injection hole and is ejected through the injection hole, the rotating sleeve rotates around the axis of the hollow core shaft to inject.

2. The rotary jet pipe cleaner according to claim 1, characterized in that: The front and rear sides of the rotating sleeve are both provided with limiting pieces to fix the rotating sleeve at corresponding positions in the axial direction of the hollow core shaft, and the limiting piece in front of the rotating sleeve is a conical guide body.

3. The rotary jetting pipe cleaner according to claim 2, characterized in that: The guide body is detachably connected to the hollow core shaft.

4. The rotary jetting pipe cleaner according to claim 2, characterized in that: The guide body is a solid cone.

5. The rotary jet pipe cleaner according to claim 3, characterized in that: The guide body is provided with a threaded blind hole and is connected to the hollow core shaft through the threaded blind hole.

6. The rotary jetting pipe cleaner according to claim 5, characterized in that: The front end of the hollow core shaft is a sealing structure.

7. The rotary jet pipe cleaner according to any one of claims 2 to 6, characterized in that: The diameter of the large end of the guide body is not less than the diameter of the rotating sleeve.

8. The rotary jet pipe cleaner according to any one of claims 1 to 6, characterized in that: The hollow core shaft is provided with a guide hole at an axial position corresponding to the injection hole in the rotating sleeve, and an annular groove is provided on the outer side so that the fluid can flow from the inner cavity of the hollow core shaft into the inner cavity of the injection hole.

9. The rotary jet pipe cleaner according to any one of claims 2 to 6, characterized in that: The hollow core shaft is threadedly connected to the tubular bracket, and the limiting piece on the rear side of the rotating sleeve is a limiting sleeve sleeved on the outer side of the hollow core shaft.

Images