A material conveying pipeline online cleaning device and process

Abstract

The present invention relates to the technical field of cleaning devices, and specifically discloses an online cleaning device and process for a material conveying pipeline, comprising a removal tower, a material conveying pipeline, a cleaning scraper, and a cleaning handle. An elastic mechanism is installed on the side of the cleaning scraper close to the cleaning handle, and a traction mechanism is provided on the end of the elastic mechanism away from the cleaning scraper. The traction mechanism includes a traction housing rotatably installed in the material conveying pipeline, a winch installed in the traction housing and wound with a rope, the end of the rope away from the winch is fixed to the cleaning scraper, and a limiting hole is provided in the traction housing; a driving gear for driving the winch to rotate is installed at the end of the cleaning handle, and a limiting pin capable of being inserted into the limiting hole is installed on the portion of the cleaning handle extending into the material conveying pipeline; a rotating seal is provided at the connection between at least one of the cleaning handle and the traction housing and the material conveying pipeline. The online cleaning device and process for a material conveying pipeline reduces wear on the sealing surface and improves the stability of the seal.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning devices, and in particular to an online cleaning device and process for a material conveying pipeline. Background Art

[0002] 2-Hydroxyethyl acrylate (HEA) is an important chemical raw material, primarily used in the production of polymers, adhesives, coatings, inks, and personal care products. In the continuous production of 2-Hydroxyethyl acrylate, the reaction liquid from the synthesis reactor enters a stripping tower through the liquid phase inlet. Unreacted ethylene oxide and other light components in the reaction liquid evaporate under the high-temperature, low-pressure vacuum conditions within the stripping tower and are extracted through the gas phase outlet for further utilization in the next stage. However, due to the high stripping temperature, the volatiles lack polymerization inhibitors, and 2-Hydroxyethyl acrylate also exhibits some volatility at this temperature, leading to small amounts of condensation and polymerization at equipment connectors. Over time, this polymer accumulates, impacting normal operation. Due to the mismatch in material type and content between the tower and the gas phase pipeline, as well as the influence of material flow, spraying a polymerization inhibitor to eliminate this polymerization is not feasible.

[0003] In the prior art, a cleaning scraper is usually used to clean the solid matter at the connection port of the equipment. Figure 7 As shown, a cleaning rod equipped with a cleaning scraper extends into the feed pipe. By manually turning or pushing and pulling the cleaning handle, the cleaning scraper located at the connection port scrapes off the polymer, pushing the cleaned polymer into the tower or pumping it through the pipeline to the next stage. To prevent vacuum leakage, a packing gland is installed at the connection between the feed pipe and the cleaning rod. Flexible graphite is filled between the cleaning rod and the feed pipe flange to achieve a tight seal.

[0004] However, during the cleaning process, the cleaning device in the prior art needs to use the cleaning handle to drive the cleaning rod to move back and forth and rotate in the material conveying pipe so as to drive the cleaning scraper to cover the entire inner wall of the pipe. However, the left and right movement and rotation of the cleaning rod in the stuffing box can easily change the compacting force of the packing, wear the packing, and cause the generation of sealing gaps, thereby affecting the sealing effect. Summary of the Invention

[0005] The present invention provides an online cleaning device and process for a material conveying pipeline, aiming to solve the problem in the related art that the relative movement between the cleaning device and the sealing device easily affects the sealing performance of the sealing device.

[0006] The present invention provides an online cleaning device for a material delivery pipeline, which adopts the following technical solutions:

[0007] The cleaning mechanism is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism which is a kind of cleaning mechanism

[0008] The above technical solution is adopted, an elastic mechanism, a traction mechanism and a limit pin are arranged between the cleaning scraper and the cleaning handle; by rotating the cleaning handle, when the limit pin is inserted into the limit hole, the limit pin drives the traction shell to rotate with the cleaning handle, and the traction shell drives the cleaning scraper to rotate in the material conveying pipe through the elastic mechanism, so that the cleaning scraper scrapes the solid matter on the inner wall of the material conveying pipe; when the limit pin is not inserted into the limit hole, the rotation of the cleaning handle can make the active gear drive the winch to rotate, the winch releases the rope, and the elastic force of the elastic mechanism can drive the cleaning scraper to move in the material conveying pipe toward the removal tower, so that the cleaning scraper can cover the entire inner wall of the pipe; and a rotating seal is provided at the connection between at least one of the cleaning handle and the traction shell and the material conveying pipe; thus, the inner wall of the pipe can be cleaned only by rotating the cleaning handle. This cleaning method reduces the wear on the sealing surface, reduces the design and installation difficulty of the seal, and can achieve sealing only by setting the rotating seal, thereby improving the stability of the seal.

[0009] Furthermore, the part of the cleaning handle that extends into the material delivery pipeline is fixed with an extension arm corresponding to the limit pin one by one, and each limit pin is assembled on the extension arm for left and right movement. A second spring is provided between each limit pin and the extension arm, and the second spring is used to apply elastic force to the limit pin so that the limit pin moves toward the traction shell. An end cap is provided at one end of each limit pin away from the traction shell, and a boss is provided on the inner wall of the material delivery pipeline for pushing the end cap to move the limit pin away from the traction shell.

[0010] Furthermore, three limiting pins are provided around the cleaning handle, and three limiting holes are opened along the circumference of the traction shell.

[0011] Furthermore, the boss is in an arc shape distributed along the circumference of the material conveying pipeline, and the height of the boss gradually decreases from the middle part to both ends in the length direction of the boss.

[0012] The above technical solution can provide a better guiding effect, guiding the end cap to be pushed by the boss or to be separated from the boss, ensuring the smooth movement of the end cap and avoiding deviation.

[0013] Furthermore, the winch includes a base installed in the traction housing, a drum fixed on the base for winding the rope, a limiting cap fixed on the end of the drum away from the base, and a driven gear arranged on the base, wherein the driven gear is engaged with the driving gear.

[0014] Furthermore, the elastic mechanism includes a plurality of mutually nested sleeves and a first spring connected between two adjacent sleeves.

[0015] With the above technical solution, the first spring is used to apply elastic force to the sleeve to move the sleeve toward the removal tower, thereby allowing the elastic mechanism to stretch and drive the cleaning scraper to move in the conveying pipeline.

[0016] Furthermore, the elastic mechanism also includes a sealing ring installed on the outer wall of each sleeve and abutting against the inner wall of the adjacent sleeve, and the outer wall of each sleeve is provided with a groove for installing the sealing ring.

[0017] With the above technical solution, the sealing ring is used to prevent fluid leakage at the joint of the sleeves to seal the joint of the sleeves, and the setting of the groove is used to ensure that the sealing ring is correctly placed between the sleeves, thereby providing effective sealing between the sleeves.

[0018] Furthermore, the outermost sleeve is fixedly connected to the cleaning scraper, the innermost sleeve is fixedly connected to the traction shell, and the innermost sleeve is communicated with the traction shell, and the rope passes through the innermost sleeve and is fixedly connected to the cleaning scraper.

[0019] Furthermore, a cleaning scraper ring is fixed to one side of the cleaning scraper close to the cleaning handle, and the cleaning scraper ring includes a ring body abutting against the inner wall of the material conveying pipe, and a connecting rod connected between the ring body and the elastic mechanism.

[0020] By adopting the above technical solution, when the cleaning scraper ring moves left and right in the feed pipeline, it can push the solids scraped off by the cleaning scraper into the removal tower or into the bypass pipe connected to the feed pipeline. At the same time, the contact area between the cleaning device and the inner wall of the feed pipeline is increased, the cleaning efficiency is improved, and the inner wall of the pipeline can be cleaned more thoroughly.

[0021] The present invention also provides an online cleaning process for a material conveying pipeline, comprising the following steps:

[0022] The first step is to rotate the cleaning handle, which drives the limit pin to rotate around the central axis of the cleaning handle;

[0023] In the second step, when the limit pin is not inserted into the limit hole of the traction housing, the driving gear at the end of the cleaning handle rotates relative to the traction housing to drive the winch to rotate. The winch releases the rope, and the elastic force of the elastic mechanism is released, thereby driving the cleaning scraper to move in the conveying pipeline toward the removal tower;

[0024] In the third step, when the limit pin is inserted into the limit hole of the traction shell, the limit pin drives the traction shell to rotate along with the cleaning handle around the central axis of the cleaning handle, and the traction shell drives the cleaning scraper to rotate in the conveying pipe through the elastic mechanism.

[0025] By adopting the above technical solution, the inner wall of the pipe can be cleaned only by rotating the cleaning handle. This cleaning method reduces the wear on the sealing surface, improves the stability of the seal, and reduces the difficulty of designing and installing the seal. Sealing can be achieved only by rotating the seal.

[0026] The cleaning device and process of the material conveying pipeline provided by the present invention have the following beneficial effects: an elastic mechanism, a traction mechanism and a limit pin are arranged between the cleaning scraper and the cleaning handle; by rotating the cleaning handle, when the limit pin is inserted into the limit hole, the limit pin drives the traction shell to rotate with the cleaning handle, and the traction shell drives the cleaning scraper to rotate in the material conveying pipeline through the elastic mechanism, so that the cleaning scraper scrapes the solid matter on the inner wall of the material conveying pipeline; when the limit pin is not inserted into the limit hole, the rotation of the cleaning handle can cause the driving gear to drive the winch to rotate, the winch releases the rope, and the elastic force of the elastic mechanism can drive the cleaning scraper to move in the material conveying pipeline toward the removal tower, so that the cleaning scraper can cover the entire inner wall of the pipeline; and a rotating seal is provided at the connection between at least one of the cleaning handle and the traction shell and the material conveying pipeline; thereby, the inner wall of the pipeline can be cleaned only by rotating the cleaning handle, and this cleaning method reduces the wear on the sealing surface, reduces the design and installation difficulty of the seal, and can achieve sealing only by setting the rotating seal, thereby improving the stability of the seal. In addition, during the process of manual or electric continuous rotation of the cleaning handle, the movement and rotation of the cleaning scraper are performed alternately, and the setting of the limit hole and the limit pin can make the movement time of the cleaning scraper shorter and the rotation time longer, thereby ensuring that the cleaning scraper fully covers the inner wall of the pipe, so as to ensure that the inner wall of the pipe is thoroughly cleaned and the cleaning efficiency is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the external structure of the removal tower of the online cleaning device for the material conveying pipeline of the present invention.

[0028] Figure 2It is a cross-sectional view of the material delivery pipeline of the material delivery pipeline online cleaning device of the present invention.

[0029] Figure 3 It is a schematic diagram of the internal structure of the material delivery pipeline of the material delivery pipeline online cleaning device of the present invention.

[0030] Figure 4 It is a structural schematic diagram of the elastic mechanism of the online cleaning device for the material conveying pipeline of the present invention.

[0031] Figure 5 It is a structural schematic diagram of the traction mechanism of the online cleaning device for the material conveying pipeline of the present invention.

[0032] Figure 6 It is a structural schematic diagram of the limit pin of the online cleaning device for the material conveying pipeline of the present invention.

[0033] Figure 7 It is a schematic diagram of the prior art structure.

[0034] Reference numerals:

[0035] 10. Removal tower; 20. Feed pipeline; 210. Boss; 30. Cleaning scraper; 40. Cleaning scraper ring; 410. Ring body; 420. Connecting rod; 50. Elastic mechanism; 510. Sleeve; 520. First spring; 530. Sealing ring; 60. Traction mechanism; 610. Traction housing; 611. Limiting hole; 620. Winch; 621. Base; 622. Reel; 623. Limiting cap; 624. Driven gear; 630. Rope; 70. Cleaning handle; 710. Driving gear; 720. Extending arm; 80. Limiting pin; 810. Second spring; 820. End cap; 90. Rotating seal. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] like Figures 1 to 6 As shown, and refer to Figure 1As shown in FIG, an embodiment of the online cleaning device for a material conveying pipeline of the present invention is used to clean solids at the connection port of an equipment, and includes a removal tower 10, a material conveying pipeline 20, a cleaning scraper 30, a cleaning scraper ring 40, an elastic mechanism 50, a traction mechanism 60, a cleaning handle 70, a limit pin 80, and a rotating seal 90. The material conveying pipeline 20 is disposed on the removal tower 10 and extends in length to the left and right. The cleaning scraper 30, the cleaning scraper ring 40, the elastic mechanism 50, the traction mechanism 60, and the limit pin 80 are respectively installed in the material conveying pipeline 20 from left to right. The cleaning handle 70 is installed outside the material conveying pipeline 20 and extends into the material conveying pipeline 20. The rotating seal 90 is installed in the material conveying pipeline 20.

[0038] like Figure 2 and Figure 3 As shown, the cleaning scraper 30 is flat as a whole, and the two end surfaces of the cleaning scraper 30 extending radially along the material conveying pipe 20 respectively abut the inner wall of the material conveying pipe 20, so that when the cleaning scraper 30 rotates around the central axis of the material conveying pipe 20, the solid matter on the inner wall of the material conveying pipe 20 is scraped off.

[0039] like Figure 2 and Figure 3 As shown, the cleaning scraper ring 40 is fixed to the side of the cleaning scraper 30 near the cleaning handle 70. The cleaning scraper ring 40 includes a ring body 410 that abuts the inner wall of the feed pipe 20, and a connecting rod 420 connected between the ring body 410 and the elastic mechanism 50. When the cleaning scraper ring 40 moves left and right within the feed pipe 20, it can push the solids scraped by the cleaning scraper 30 into the removal tower 10 or into the bypass pipe connected to the feed pipe 20. At the same time, the contact area between the cleaning device and the inner wall of the feed pipe 20 is increased, thereby improving the cleaning efficiency and more thoroughly cleaning the inner wall of the pipe.

[0040] like Figures 2 to 4As shown, the elastic mechanism 50 includes multiple nested sleeves 510, a first spring 520 connected between two adjacent sleeves 510, and a sealing ring 530 mounted on the outer wall of each sleeve 510 and abutting the inner wall of the adjacent sleeve 510. The outermost sleeve 510 is fixedly connected to the cleaning scraper 30, while the innermost sleeve 510 is fixedly connected to the traction mechanism 60. The first spring 520 is used to apply an elastic force to the sleeves 510, causing them to move toward the removal tower 10, thereby allowing the elastic mechanism 50 to expand and drive the cleaning scraper 30 and cleaning ring 40 to move within the conveying pipeline 20. The sealing ring 530 is used to prevent fluid leakage at the joints of the sleeves 510 and to seal the joints. A groove is defined on the outer wall of each sleeve 510 for mounting the sealing ring 530, ensuring that the sealing ring 530 is properly positioned between the sleeves 510, thereby providing an effective seal between the sleeves 510. Of the two adjacent sleeves 510 , the inner wall of the outer sleeve 510 is provided with a limiting groove extending along the length direction of the sleeve 510 , and the outer wall of the inner sleeve 510 is fixed with a limiting block movably assembled in the limiting groove.

[0041] like Figure 2 、 Figure 4 、 Figure 5 and Figure 6 As shown, the traction mechanism 60 includes a traction housing 610 rotatably mounted within the material conveying pipeline 20, and a winch 620 mounted within the traction housing 610 and wound with a rope 630. The winch 620 includes a base 621 mounted within the traction housing 610, a drum 622 secured to the base 621 for winding the rope 630, a stop cap 623 secured to the end of the drum 622 away from the base 621, and a driven gear 624 disposed on the base 621. The innermost sleeve 510 is fixedly connected to the traction housing 610 and communicates with the traction housing 610. The rope 630 passes through the innermost sleeve 510 and is fixedly connected to the cleaning scraper 30. A limiting hole 611 is opened on one side of the traction shell 610 close to the cleaning handle 70. There are three limiting holes 611 along the circumference of the traction shell 610. The three limiting holes 611 are respectively located at 1 / 9, 5 / 9 and 9 / 9 of the circumference of the traction shell 610.

[0042] like Figure 2 、 Figure 3 、 Figure 5 and Figure 6As shown, the end of the cleaning handle 70 that extends into the feed pipe 20 penetrates the traction housing 610 and is equipped with a driving gear 710 that drives the winch 620 to rotate, thereby retracting and releasing the rope 630. The driven gear 624 meshes with the driving gear 710. Three extension arms 720 are fixed to the portion of the cleaning handle 70 that extends into the feed pipe 20. The three extension arms 720 are evenly distributed around the cleaning handle 70 and each extension arm 720 extends radially along the feed pipe 20. A stop pin 80 is assembled on the extension arm 720 for left and right movement. A second spring 810 is disposed between each stop pin 80 and the extension arm 720. The second spring 810 is used to apply an elastic force to the stop pin 80, causing the stop pin 80 to move toward the traction housing 610, thereby allowing the stop pin 80 to be inserted into the limit hole 611, thereby driving the traction housing 610 to rotate with the cleaning handle 70. Each stop pin 80 is provided with an end cap 820 at the end away from the traction housing 610. The end cap 820 is tapered with a smaller end on the left and a larger end on the right. The inner wall of the feed pipe 20 is provided with a boss 210 for pushing the end cap 820 to move the stop pin 80 away from the traction housing 610, thereby allowing the stop pin 80 to be pulled out of the stop hole 611, allowing the cleaning handle 70 to rotate relative to the traction housing 610, and thus allowing the driving gear 710 to drive the winch 620 to rotate. The boss 210 is in the shape of an arc distributed along the circumference of the feed pipe 20. The height of the boss 210 gradually decreases from the middle of the boss 210 along its length to the ends, providing better guidance, guiding the end cap 820 to be pushed by the boss 210 or to disengage from the boss 210, ensuring smooth movement of the end cap 820 and preventing deviation.

[0043] like Figure 2 and Figure 5 As shown, the rotary seal 90 is installed at the connection between the traction housing 610 and the material delivery pipe 20. In other embodiments, the rotary seal 90 can also be installed at the connection between the cleaning handle 70 and the material delivery pipe 20.

[0044] An embodiment of the online cleaning process for a material delivery pipeline of the present invention comprises the following steps:

[0045] In the first step, the cleaning handle 70 is manually rotated, and the cleaning handle 70 drives the three limit pins 80 to rotate around the central axis of the cleaning handle 70 through the three extending arms 720.

[0046] The second step is Figure 6As shown, the cleaning handle 70 rotates clockwise, and one of the limit pins 80 rotates to the middle of the boss 210 and is opposite to the limit hole 611 located at 9 / 9 of the circumference of the traction shell 610. The limit pin 80 is defined as the first limit pin 80, and the limit pins 80 located in front of the limit pin 80 along the rotation direction are the second limit pin 80 and the third limit pin 80 respectively. At this time, the three limit pins 80 are not inserted into the limit hole 611 of the traction shell 610, and the cleaning device enters the moving scraping state. The driving gear 710 at the end of the cleaning handle 70 rotates relative to the traction housing 610, and drives the winch 620 to rotate by engaging with the driven gear 624. The winch 620 releases the rope 630, and the elastic force of the first spring 520 is partially released. The sleeve 510 moves a distance toward the removal tower 10, and the elastic mechanism 50 partially extends, thereby driving the cleaning scraper 30 and the cleaning scraper ring 40 to move a distance in the material conveying pipeline 20 toward the removal tower 10. The cleaning scraper ring 40 pushes and scrapes the fixed objects on the inner wall of the material conveying pipeline 20.

[0047] In the third step, after the mobile scraping state continues for 1 / 9 of a rotation, the first stop pin 80 leaves the center of the boss 210 and aligns with the stop hole 611 located at 1 / 9 of the circumference of the traction housing 610. Under the elastic force of the second spring 810, the first stop pin 80 inserts into the stop hole 611, and the cleaning device enters the rotating scraping state. The first stop pin 80 drives the traction housing 610 to rotate 8 / 9 of a rotation along with the cleaning handle 70. During this time, the traction housing 610, via the elastic mechanism 50, drives the cleaning blade 30 to rotate within the material conveying pipe 20, and the cleaning blade 30 scrapes solid matter from the inner wall of the material conveying pipe 20.

[0048] Step 4: After the rotating scraping state continues for 8 / 9 of a rotation, the first stop pin 80 rotates to the middle of the boss 210 and is pulled out of the stop hole 611 by the boss 210, and the cleaning device enters the moving scraping state. After the moving scraping state continues for 1 / 9 of a rotation, the second stop pin 80 is inserted into the stop hole 611 located at 5 / 9 of the circumference of the traction housing 610, and the cleaning device enters the rotating scraping state. After the rotating scraping state continues for 5 / 9 of a rotation, the second stop pin 80 rotates to the middle of the boss 210 and is pulled out of the stop hole 611 by the boss 210, and the cleaning device enters the moving scraping state. After the moving scraping state continues for 1 / 9 of a rotation, the third stop pin 80 is inserted into the stop hole 611 located at 9 / 9 of the circumference of the traction housing 610, and the cleaning device enters the rotating scraping state. After the rotating scraping state lasts for 2 / 3 of a rotation, the third limiting pin 80 rotates to the middle of the boss 210 and is pulled out of the limiting hole 611 by the boss 210. The cleaning device enters the moving scraping state, thus repeating the cycle.

[0049] In this way, the inner wall of the pipe can be cleaned simply by rotating the cleaning handle 70. This cleaning method reduces wear on the sealing surface and simplifies the design and installation difficulty of the seal. Sealing can be achieved simply by rotating the seal 90, thereby improving the stability of the seal. In addition, during the manual or electric rotation of the cleaning handle 70, the movement and rotation of the cleaning scraper 30 are alternated. The positioning hole 611 and the positioning pin 80 can be used to shorten the movement time of the cleaning scraper 30 and lengthen the rotation time of the cleaning scraper 30. This ensures that the cleaning scraper 30 fully covers the inner wall of the pipe, ensuring that the inner wall of the pipe is thoroughly cleaned, effectively improving cleaning efficiency.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0052] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An online cleaning device for a material delivery pipeline, comprising a removal tower, a material delivery pipeline arranged on the removal tower and extending to the left and right, a cleaning scraper installed in the material delivery pipeline, and a cleaning handle installed outside the material delivery pipeline, characterized in that: An elastic mechanism is installed on the side of the cleaning scraper close to the cleaning handle, and a traction mechanism is provided on the end of the elastic mechanism away from the cleaning scraper. The traction mechanism includes a traction housing rotatably installed in the material conveying pipe, a winch installed in the traction housing and wound with a rope, and the end of the rope away from the winch is fixed to the cleaning scraper. A limiting hole is provided on the side of the traction housing close to the cleaning handle; the number of the limiting holes is three, and the three limiting holes are respectively located at 1 / 9, 5 / 9, and 9 / 9 of the circumference of the traction housing; The end of the cleaning handle extending into the material delivery pipeline passes through the traction housing and is equipped with a driving gear that drives the winch to rotate so that the winch can retract and release the rope. The part of the cleaning handle extending into the material delivery pipeline is equipped with a limit pin that can be inserted into the limit hole. Three limit pins are arranged around the cleaning handle, thereby driving the traction housing to rotate with the cleaning handle; a rotating seal is provided at the connection between at least one of the cleaning handle and the traction housing and the material delivery pipeline; the part of the cleaning handle extending into the material delivery pipeline is fixed with an extension arm corresponding to the limit pin one by one, and each limit pin is assembled on the extension arm for left and right movement. A second spring is provided between each limit pin and the extending arm, and the second spring is used to apply elastic force to the limit pin so that the limit pin moves in a direction close to the traction housing. An end cap is provided at one end of each limit pin away from the traction housing, and a boss is provided on the inner wall of the feed pipe for pushing the end cap so that the limit pin moves in a direction away from the traction housing. The winch includes a base installed in the traction housing, a drum fixed on the base for winding a rope, a limit cap fixed at one end of the drum away from the base, and a driven gear provided on the base, wherein the driven gear is meshed with the driving gear. The boss is in an arc shape distributed along the circumference of the conveying pipe, and the height of the boss gradually decreases from the middle of the boss in the length direction to the two ends; The elastic mechanism includes a plurality of mutually nested sleeves and a first spring connected between two adjacent sleeves; the outermost sleeve is fixedly connected to the cleaning scraper, the innermost sleeve is fixedly connected to the traction shell, and the innermost sleeve is communicated with the traction shell, and the rope passes through the innermost sleeve and is fixedly connected to the cleaning scraper.

2. The online cleaning device for a material delivery pipeline according to claim 1, characterized in that: The elastic mechanism further comprises a sealing ring installed on the outer wall of each sleeve and abutting against the inner wall of the adjacent sleeve. The outer wall of each sleeve is provided with a groove for installing the sealing ring.

3. The online cleaning device for a material delivery pipeline according to claim 1, characterized in that: A cleaning scraper ring is fixed on one side of the cleaning scraper close to the cleaning handle. The cleaning scraper ring includes a ring body abutting against the inner wall of the material conveying pipe and a connecting rod connected between the ring body and the elastic mechanism.

4. A material delivery pipeline online cleaning process, characterized in that: Using the online cleaning device for conveying pipelines as described in claim 1, The following steps are involved: The first step is to rotate the cleaning handle, which drives the limit pin to rotate around the central axis of the cleaning handle; In the second step, when the limit pin is not inserted into the limit hole of the traction housing, the driving gear at the end of the cleaning handle rotates relative to the traction housing to drive the winch to rotate. The winch releases the rope, and the elastic force of the elastic mechanism is released, thereby driving the cleaning scraper to move in the conveying pipeline toward the removal tower; In the third step, when the limit pin is inserted into the limit hole of the traction shell, the limit pin drives the traction shell to rotate along with the cleaning handle around the central axis of the cleaning handle, and the traction shell drives the cleaning scraper to rotate in the conveying pipe through the elastic mechanism.

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