Online cleaning device and process for material conveying pipeline

Abstract

The invention relates to the technical field of cleaning devices, and particularly discloses a conveying pipeline online cleaning device and process, the conveying pipeline online cleaning device comprises a removal tower, a conveying pipeline, a cleaning scraper blade and a cleaning handle, an elastic mechanism is mounted on the side, close to the cleaning handle, of the cleaning scraper blade, and a traction mechanism is arranged at the end, away from the cleaning scraper blade, of the elastic mechanism; the traction mechanism comprises a traction shell rotationally installed in the conveying pipeline and a winch installed in the traction shell and wound with a rope, the end, away from the winch, of the rope is fixed to the cleaning scraper, and a limiting hole is formed in the traction shell. A driving gear for driving the winch to rotate is mounted at the end part of the cleaning handle; a limiting pin capable of being inserted into the limiting hole is mounted at the part, extending into the conveying pipeline, of the cleaning handle; a rotary sealing piece is arranged at the joint of at least one of the cleaning handle and the traction shell and the material conveying pipeline. According to the on-line cleaning device and process for the material conveying pipeline, abrasion to a sealing surface is reduced, and the sealing stability is improved.

Description

Technical Field

[0001] The 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, mainly used in the production of polymers, adhesives, coatings, inks and personal care products. When 2-hydroxyethyl acrylate is produced by a continuous process, the reaction liquid from the synthesis reactor enters the stripping tower from the liquid phase inlet. The unreacted ethylene oxide and other light component gases contained in the reaction liquid volatilize under the vacuum conditions of high temperature and low pressure in the stripping tower, and are extracted from the gas phase outlet and sent to the next link for use. However, due to the high stripping temperature, there is no inhibitor in the volatiles, and 2-hydroxyethyl acrylate also has a certain volatility at this temperature, and a small amount of condensation polymerization occurs at the connection port of the equipment. Over time, the polymer accumulates, which will affect the normal operation of the equipment. Because the types and contents of materials in the tower and the gas phase pipeline are inconsistent, and affected by the flow direction of the materials, it is impossible to eliminate the polymerization by spraying the inhibitor.

[0003] In the prior art, solid matter at the connection port of the device is usually cleaned using a cleaning scraper. Figure 7 As shown, the cleaning rod equipped with a cleaning scraper extends into the feed pipe, and the cleaning handle is manually turned or pushed and pulled. The cleaning scraper located at the connection port can scrape off the polymer, and push the cleaned polymer into the tower or pump it into the next section along the pipeline. To prevent vacuum leakage, a stuffing seal is set at the connection between the feed pipe and the cleaning rod, and flexible graphite is filled between the cleaning rod and the flange of the feed pipe to achieve a sealing effect in a compressed form.

[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 pipeline so as to drive the cleaning scraper to cover the entire inner wall of the pipeline. However, the left and right movement and rotation of the cleaning rod in the stuffing box can easily change the clamping force of the packing, wear the packing, cause the formation of sealing gaps, and affect 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 conveying pipeline, which adopts the following technical solution: The cleaning device of claim 1, wherein the cleaning blade is provided with an elastic mechanism on one side of the cleaning blade close to the cleaning handle, and a traction mechanism is provided on one end of the elastic mechanism away from the cleaning blade. The traction mechanism comprises a traction shell rotatably installed in the material conveying pipeline, a winch installed in the traction shell and wound with a rope, and one end of the rope away from the winch is fixed on the cleaning blade, and a limiting hole is provided on the side of the traction shell close to the cleaning handle; the end of the cleaning handle extending into the material conveying pipeline penetrates the traction shell, and is provided with a driving gear for driving the winch to rotate so that the winch can retract and release the rope; the part of the cleaning handle extending into the material conveying pipeline is provided with a limiting pin that can be inserted into the limiting hole, thereby driving the traction shell 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 shell and the material conveying pipeline.

[0007] By adopting the above technical scheme, 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 solids 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 make the active gear drive the capstan to rotate, the capstan 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 arranged 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 such a 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.

[0008] 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, and a second spring is arranged between each limit pin and the extension arm, and the second spring is used to apply an elastic force to the limit pin so that the limit pin moves toward the traction shell, and an end cap is arranged at one end of each limit pin away from the traction shell, and a boss is arranged on the inner wall of the material delivery pipeline for pushing the end cap to move the limit pin in the direction away from the traction shell.

[0009] Furthermore, three limit pins are arranged around the cleaning handle, and three limit holes are opened along the circumference of the traction shell.

[0010] Furthermore, the boss is in an arc shape distributed along the circumference of the conveying pipeline, and the height of the boss gradually decreases from the middle part to both ends in the length direction of the boss.

[0011] The above technical solution can provide a better guiding effect, guide the end cap to be pushed by the boss or to be separated from the boss, ensure the smooth movement of the end cap and avoid deviation.

[0012] 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 meshes with the driving gear.

[0013] Furthermore, the elastic mechanism includes a plurality of mutually nested sleeves and a first spring connected between two adjacent sleeves.

[0014] 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.

[0015] 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.

[0016] 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 groove is provided to ensure that the sealing ring is correctly placed between the sleeves, thereby providing effective sealing between the sleeves.

[0017] 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.

[0018] Furthermore, a cleaning scraper ring is fixed to one side of the cleaning scraper blade close to the cleaning handle, and the cleaning scraper ring includes a ring body abutting against the inner wall of the material conveying pipeline, and a connecting rod connected between the ring body and the elastic mechanism.

[0019] By adopting the above technical solution, when the cleaning scraper ring moves left and right in the feed pipeline, the solids scraped off by the cleaning scraper can be pushed 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.

[0020] The present invention also provides an online cleaning process for a material delivery pipeline, comprising the following steps: The first step is to rotate the cleaning handle, and the cleaning handle 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 around the central axis of the cleaning handle along with the cleaning handle, and the traction shell drives the cleaning scraper to rotate in the conveying pipeline through the elastic mechanism.

[0021] 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.

[0022] The beneficial effects of the online cleaning device and process of the material conveying pipeline provided by the present invention are as follows: 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 solids 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 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 pipeline toward the removal tower, so that the cleaning scraper can cover the entire inner wall of the pipeline; and a rotating seal is arranged 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 such a 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 holes and the limit pins 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, thereby ensuring that the inner wall of the pipe is thoroughly cleaned and effectively improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 2 It is a cross-sectional view of a material conveying pipeline of the material conveying pipeline online cleaning device of the present invention.

[0025] Figure 3 It is a schematic diagram of the internal structure of the material conveying pipeline of the material conveying pipeline online cleaning device of the present invention.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Figure 7 It is a schematic diagram of the prior art structure.

[0030] Reference numerals: 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. Drum; 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

[0031] 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.

[0032] like Figures 1 to 6 As shown, and refer to Figure 1 In the orientation shown in the figure, an embodiment of the online cleaning device for the feed pipeline of the present invention is used to clean the solids at the connection port of the equipment, and includes a removal tower 10, a feed 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 feed pipeline 20 is arranged 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 feed pipeline 20 from left to right in sequence. The cleaning handle 70 is installed outside the feed pipeline 20 and extends into the feed pipeline 20. The rotating seal 90 is installed in the feed pipeline 20.

[0033] 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 feed pipeline 20 respectively abut the inner wall of the feed pipeline 20, so that when the cleaning scraper 30 rotates around the central axis of the feed pipeline 20, the solid matter on the inner wall of the feed pipeline 20 is scraped off.

[0034] like Figure 2 and Figure 3 As shown, the cleaning scraper ring 40 is fixed to one side of the cleaning scraper 30 near the cleaning handle 70. The cleaning scraper ring 40 includes a ring body 410 abutting against 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 in the feed pipe 20, the solids scraped by the cleaning scraper 30 can be pushed 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, the cleaning efficiency is improved, and the inner wall of the pipe can be cleaned more thoroughly.

[0035] like Figures 2 to 4 As shown, the elastic mechanism 50 includes a plurality of mutually nested sleeves 510, a first spring 520 connected between two adjacent sleeves 510, and a sealing ring 530 installed on the outer wall of each sleeve 510 and abutting against the inner wall of the adjacent sleeve 510. The outermost sleeve 510 is fixedly connected to the cleaning scraper 30, and the innermost sleeve 510 is fixedly connected to the traction mechanism 60. The first spring 520 is used to apply elastic force to the sleeve 510 so that the sleeve 510 moves toward the direction close to the removal tower 10, so that the elastic mechanism 50 can stretch, and then drive the cleaning scraper 30 and the cleaning scraper ring 40 to move in the conveying pipeline 20. The sealing ring 530 is used to prevent fluid leakage at the joint of the sleeve 510, so as to seal the joint of the sleeve 510. A groove for installing the sealing ring 530 is provided on the outer wall of each sleeve 510 to ensure that the sealing ring 530 is correctly placed 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.

[0036] like Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the traction mechanism 60 includes a traction housing 610 rotatably mounted in the material conveying pipeline 20, and a winch 620 mounted in the traction housing 610 and wound with a rope 630. The winch 620 includes a base 621 mounted in the traction housing 610, a drum 622 fixed on the base 621 for winding the rope 630, a limit cap 623 fixed on the end of the drum 622 away from the base 621, and a driven gear 624 arranged on the base 621. The innermost sleeve 510 is fixedly connected to the traction housing 610, and the innermost sleeve 510 is in communication with the traction housing 610, and the rope 630 passes through the innermost sleeve 510 and is fixedly connected to the cleaning scraper 30. A limiting hole 611 is provided on one side of the traction shell 610 close to the cleaning handle 70 . Three limiting holes 611 are arranged 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 .

[0037] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the end of the cleaning handle 70 extending 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 so that the winch 620 retracts and releases the rope 630, and the driven gear 624 is meshed with the driving gear 710. Three extension arms 720 are fixed to the portion of the cleaning handle 70 extending 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. The limit pin 80 is assembled on the extension arm 720 for left and right movement. A second spring 810 is provided between each limit pin 80 and the extension arm 720, and the second spring 810 is used to apply elastic force to the limit pin 80, so that the limit pin 80 moves in the direction close to the traction housing 610, so that the limit pin 80 can be inserted into the limit hole 611, thereby driving the traction housing 610 to rotate with the cleaning handle 70. An end cap 820 is provided at one end of each stop pin 80 away from the traction housing 610, and the end cap 820 is in a cone shape with a small left side and a large right side. 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, so that the stop pin 80 can be pulled out of the stop hole 611, so that the cleaning handle 70 can rotate relative to the traction housing 610, and then the driving gear 710 can drive the winch 620 to rotate. The boss 210 is in an arc shape distributed along the circumference of the feed pipe 20, and the height of the boss 210 gradually decreases from the middle of the length direction of the boss 210 to both ends, which can provide a better guiding effect, guide the end cap 820 to be pushed by the boss 210 or to be separated from the boss 210, and ensure the smooth movement of the end cap 820 to avoid deviation.

[0038] like Figure 2 and Figure 5As shown, the rotary seal 90 is installed at the connection between the traction housing 610 and the material delivery pipeline 20. In other embodiments, the rotary seal 90 can also be installed at the connection between the cleaning handle 70 and the material delivery pipeline 20.

[0039] The embodiment of the online cleaning process of the feed pipeline of the present invention comprises the following steps: 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.

[0040] The second step is, Figure 6 As 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 a 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, and the cleaning scraper ring 40 pushes and scrapes the fixed objects on the inner wall of the material conveying pipeline 20.

[0041] Step 3: After the moving scraping state lasts for 1 / 9 of a rotation time, the first stop pin 80 leaves the middle of the boss 210 and faces 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 is inserted 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 period, the traction housing 610 drives the cleaning scraper 30 to rotate in the conveying pipe 20 through the elastic mechanism 50, and the cleaning scraper 30 scrapes the solids on the inner wall of the conveying pipe 20.

[0042] Step 4: After the rotation and scraping state lasts for 8 / 9 of a rotation time, the first limit pin 80 rotates to the middle of the boss 210, and is pulled out of the limit hole 611 by the boss 210, and the cleaning device enters the mobile scraping state. After the mobile scraping state lasts for 1 / 9 of a rotation time, the second limit pin 80 is inserted into the limit hole 611 located at 5 / 9 of the circumference of the traction shell 610, and the cleaning device enters the rotation and scraping state. After the rotation and scraping state lasts for 5 / 9 of a rotation time, the second limit pin 80 rotates to the middle of the boss 210, and is pulled out of the limit hole 611 by the boss 210, and the cleaning device enters the mobile scraping state. After the mobile scraping state lasts for 1 / 9 of a rotation time, the third limit pin 80 is inserted into the limit hole 611 located at 9 / 9 of the circumference of the traction shell 610, and the cleaning device enters the rotation and scraping state. After the rotating scraping state lasts for 2 / 3 of a rotation time, 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, and the cleaning device enters the moving scraping state, thus reciprocating.

[0043] In this way, the inner wall of the pipeline can be cleaned only by rotating the cleaning handle 70. This cleaning method reduces the wear on the sealing surface, reduces the difficulty of designing and installing the seal, and can achieve sealing only by rotating the seal 90, thereby improving the stability of the seal. In addition, during the manual or electric continuous rotation of the cleaning handle 70, the movement and rotation of the cleaning scraper 30 are performed alternately, and the movement time of the cleaning scraper 30 can be shorter and the rotation time can be longer by setting the limiting hole 611 and the limiting pin 80, thereby ensuring that the cleaning scraper 30 fully covers the inner wall of the pipeline, so as to ensure that the inner wall of the pipeline is thoroughly cleaned, and effectively improve the cleaning efficiency.

[0044] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An online cleaning device for a material conveying pipeline, comprising a removal tower (10), a material conveying pipeline (20) arranged on the removal tower (10) and extending in length to the left and right, a cleaning scraper (30) installed in the material conveying pipeline (20), and a cleaning handle (70) installed outside the material conveying pipeline (20), characterized in that: An elastic mechanism (50) is installed on a side of the cleaning scraper (30) close to the cleaning handle (70), and a traction mechanism (60) is provided on an end of the elastic mechanism (50) away from the cleaning scraper (30). The traction mechanism (60) comprises a traction housing (610) rotatably installed in the material conveying pipeline (20), and a winch (620) installed in the traction housing (610) and wound with a rope (630), and one end of the rope (630) away from the winch (620) is fixed to the cleaning scraper (30), and a limiting hole (611) is provided on a side of the traction housing (610) close to the cleaning handle (70); The end of the cleaning handle (70) extending into the feed pipe (20) passes through the traction housing (610) and is provided with a driving gear (710) for driving the winch (620) to rotate so that the winch (620) retracts and releases the rope (630). The portion of the cleaning handle (70) extending into the feed pipe (20) is provided with a limit pin (80) capable of being inserted into a limit hole (611), thereby driving the traction housing (610) to rotate along with the cleaning handle (70). A rotating seal (90) is provided at a connection between at least one of the cleaning handle (70) and the traction housing (610) and the feed pipe (20).

2. The online cleaning device for a material delivery pipeline according to claim 1, characterized in that: The portion of the cleaning handle (70) extending into the feed pipe (20) is fixed with an extension arm (720) corresponding to the limit pin (80) one by one, and each of the limit pins (80) is assembled on the extension arm (720) so as to be movable left and right. A second spring (810) is provided between each of the limit pins (80) and the extension arm (720), and the second spring (810) is used to apply an elastic force to the limit pin (80) so as to move the limit pin (80) in a direction close to the traction housing (610). An end cap (820) is provided at one end of each of the limit pins (80) away from the traction housing (610), and a boss (210) is provided on the inner wall of the feed pipe (20) for pushing the end cap (820) so as to move the limit pin (80) in a direction away from the traction housing (610).

3. The online cleaning device for a material delivery pipeline according to claim 1, characterized in that: Three limiting pins (80) are arranged around the cleaning handle (70), and three limiting holes (611) are opened along the circumference of the traction housing (610).

4. The online cleaning device for a material delivery pipeline according to claim 2, characterized in that: The boss (210) is in the shape of an arc distributed along the circumference of the material conveying pipeline (20), and the height of the boss (210) gradually decreases from the middle of the boss (210) in the length direction to both ends.

5. The online cleaning device for a material delivery pipeline according to claim 1, characterized in that: The winch (620) comprises a base (621) installed in a traction housing (610), a drum (622) fixed on the base (621) for winding a rope (630), a limit cap (623) fixed on an end of the drum (622) away from the base (621), and a driven gear (624) arranged on the base (621), wherein the driven gear (624) meshes with the driving gear (710).

6. The online cleaning device for a material delivery pipeline according to claim 1, characterized in that: The elastic mechanism (50) comprises a plurality of mutually nested sleeves (510) and a first spring (520) connected between two adjacent sleeves (510).

7. The online cleaning device for a material delivery pipeline according to claim 6, characterized in that: The elastic mechanism (50) further comprises a sealing ring (530) mounted on the outer wall of each sleeve (510) and abutting against the inner wall of an adjacent sleeve (510), and a groove for mounting the sealing ring (530) is provided on the outer wall of each sleeve (510).

8. The online cleaning device for a material delivery pipeline according to claim 6, characterized in that: The outermost sleeve (510) is fixedly connected to the cleaning scraper (30), the innermost sleeve (510) is fixedly connected to the traction shell (610), and the innermost sleeve (510) is in communication with the traction shell (610), and the rope (630) passes through the innermost sleeve (510) and is fixedly connected to the cleaning scraper (30).

9. The online cleaning device for a material delivery pipeline according to claim 1, characterized in that: A cleaning scraper ring (40) is fixed to one side of the cleaning scraper (30) close to the cleaning handle (70), and the cleaning scraper ring (40) comprises a ring body (410) abutting against the inner wall of the material conveying pipe (20) and a connecting rod (420) connected between the ring body (410) and the elastic mechanism (50).

10. An online cleaning process for a material delivery pipeline, 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 (70), so that the cleaning handle (70) drives the limit pin (80) to rotate around the central axis of the cleaning handle (70); In the second step, when the limiting pin (80) is not inserted into the limiting hole (611) of the traction housing (610), the driving gear (710) at the end of the cleaning handle (70) rotates relative to the traction housing (610) to drive the winch (620) to rotate, the winch (620) releases the rope (630), and the elastic force of the elastic mechanism (50) is released, thereby driving the cleaning scraper (30) to move in the conveying pipeline (20) toward the removal tower (10); In the third step, when the limiting pin (80) is inserted into the limiting hole (611) of the traction housing (610), the limiting pin (80) drives the traction housing (610) to rotate along with the cleaning handle (70) around the central axis of the cleaning handle (70), and the traction housing (610) drives the cleaning scraper (30) to rotate in the material conveying pipe (20) through the elastic mechanism (50).

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