Environment-friendly cloth-based sandpaper recycling device and use method thereof

Abstract

The present application relates to the technical field of sandpaper recycling, and particularly relates to an environment-friendly cloth-based sandpaper recycling device and a use method thereof, which comprises a rack, a circulating flexible beater arranged on the rack, a circulating driving mechanism and a plurality of flexible beating heads, the circulating driving mechanism drives the plurality of flexible beating heads to move along the conveying direction of the waste cloth-based sandpaper at a linear speed equal to the conveying speed of the waste cloth-based sandpaper, and a conveying clamp roller group rotatably arranged on the rack and located upstream and downstream of the circulating flexible beater. The present application can drive the plurality of flexible beating heads to move at a linear speed equal to the conveying speed of the waste cloth-based sandpaper in the same direction, so as to impact the surface of the sandpaper perpendicularly at a high frequency, effectively shake off the abrasive particles and avoid damaging the cloth-based fibers. Meanwhile, the surface of the sandpaper can be cleaned by air blowing, the scraper body is self-cleaned, and the cleaning effect is improved.

Description

Technical Field

[0001] This invention relates to the field of sandpaper recycling technology, specifically to an environmentally friendly cloth-based sandpaper recycling and reuse device and its usage method. Background Technology

[0002] Cloth-based sandpaper is widely used for polishing surfaces such as metals, wood, and composite materials due to its wear-resistant and tear-resistant properties. Industrial production generates a large amount of waste cloth-based sandpaper. While the abrasive layer, such as the sand particles, may be worn or clogged, the cloth itself remains intact, making it highly valuable for reuse.

[0003] Existing equipment for cleaning and recycling waste sandpaper still has the following main drawbacks: On the one hand, most waste sandpaper recycling equipment uses fixed brush rollers or fixed scrapers to remove the abrasive particles on the surface of the sandpaper. Since the abrasive particles on the surface of the sandpaper are firmly adhered to the cloth base by the resin binder, it is difficult to completely remove them by brushing alone, resulting in low efficiency. On the other hand, when using a fixed scraper, the rigid scraper or hard brush can easily scratch, fray, or even tear the cloth base fibers during operation, leading to a decrease in the strength of the recycled cloth base. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned problems existing in the prior art and provide an environmentally friendly cloth-based sandpaper recycling and reuse device and its usage method that has high cleaning efficiency, does not damage the cloth base and is environmentally friendly.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an environmentally friendly cloth-based sandpaper recycling and reuse device, comprising: frame; A circulating flexible beater is mounted on a frame. The circulating flexible beater includes a circulating drive mechanism and multiple flexible beaters. The circulating drive mechanism drives the multiple flexible beaters to move along the conveying direction of the waste cloth-based sandpaper, and the linear velocity is equal to the conveying speed of the waste cloth-based sandpaper. The conveyor roller assembly is rotatably mounted on the frame, located upstream and downstream of the circulating flexible beater; A vibration isolator is mounted on the frame and located between the circulating flexible beater and the conveyor roller assembly. The vibration isolator includes an elastic pressure plate, the lower surface of which is attached to and presses against the upper surface of the waste cloth-based sandpaper. A self-cleaning tilting scraper is fixed on the frame. The self-cleaning tilting scraper includes a scraper body and an airflow channel embedded in the blade of the scraper body. The collection hopper is detachably connected to the frame and is located directly below the self-cleaning inclined scraper.

[0006] Furthermore, the cyclic drive mechanism includes a drive sprocket, a driven sprocket, and a transmission chain surrounding the drive sprocket and the driven sprocket. The roots of the plurality of flexible beaters are fixed to the outer chain plate of the transmission chain and are arranged at equal intervals along the extension direction of the transmission chain. The drive sprocket is connected to the output shaft of the drive motor, and the drive motor is fixed on the frame.

[0007] Furthermore, the flexible striking head includes a connecting seat fixedly connected to the transmission chain, and a striking body detachably mounted on the connecting seat, wherein the free end of the striking body is an arc-shaped curved surface.

[0008] Furthermore, when the striking body is in the working section close to the waste cloth-based sandpaper, there is a gap between the free end of the striking body and the abrasive surface of the waste cloth-based sandpaper.

[0009] Furthermore, the conveying roller group includes multiple pairs of rollers arranged sequentially along the conveying direction, each pair of rollers consisting of an upper roller and a lower roller arranged correspondingly above and below; The upper and lower clamping rollers have elastic roller surfaces, and multiple annular chip removal grooves are spaced apart along the circumferential direction on the elastic roller surfaces.

[0010] Furthermore, the vibration isolator also includes a crossbeam fixed to the frame, and multiple buffer connection assemblies; The buffer connection assembly includes a guide post, a compression spring, and a spring seat. The upper end of the guide post passes through the crossbeam and slides with the crossbeam. The lower end of the guide post is fixedly connected to the upper surface of the elastic pressure plate. The compression spring is sleeved on the guide post, and the upper and lower ends of the compression spring abut against the lower surface of the crossbeam and the upper surface of the spring seat, respectively. The spring seat is fixed on the guide post.

[0011] Furthermore, the blade of the scraper body is a serrated blade, which is composed of multiple convex teeth and grooves arranged alternately along the length of the scraper body. The airflow channel includes multiple branch air passages that are connected to the grooves, and the air outlet of each branch air passage is located at the bottom of the corresponding groove.

[0012] Furthermore, the self-cleaning tilting scraper also includes a pulse airflow generator, which includes a cylinder body fixed on the frame, a piston that is sealed and slidably disposed in the cylinder body, and a transmission connecting rod. The cylinder body is provided with an inlet one-way valve and an outlet one-way valve, and the outlet of the outlet one-way valve is connected to the inlet end of the airflow channel.

[0013] Furthermore, the transmission connecting rod includes a crank and a connecting rod body. One end of the crank is fixedly connected to the driven sprocket, and the other end is rotatably connected to one end of the connecting rod body. The other end of the connecting rod body is hinged to the piston rod of the piston.

[0014] A method for using an environmentally friendly cloth-based sandpaper recycling and reuse device includes the following steps: S1. Waste cloth-based sandpaper is conveyed through a conveyor roller group, while a vibration isolator is used to press the sandpaper and isolate vibration. S2. The abrasive surface is subjected to high-frequency vertical tapping by a circulating flexible beater at a linear speed equal to that of the sandpaper feed speed, causing the abrasive particles to loosen and fall off. S3. The residual abrasive is scraped off by a self-cleaning tilting scraper and the airflow channel is used to spray air to clean the blade and sandpaper in real time, and the detached abrasive debris is collected into the collection hopper.

[0015] The technical solution provided by this invention has the following advantages compared with the known prior art: This invention features a circulating flexible beater that uses a circulating drive mechanism to drive multiple flexible beater heads to move in the same direction at a linear velocity equal to the conveying speed of the waste cloth-based sandpaper. This creates a relatively static, vertical striking effect between the flexible beater heads and the abrasive surface of the sandpaper, converting the beating force into a high-frequency impact perpendicular to the sandpaper surface rather than a frictional force along the conveying direction. This effectively dislodges abrasive particles while avoiding damage to the cloth-based fibers. Simultaneously, the free end of the flexible beater head features an arc-shaped curved surface design and maintains a small gap with the abrasive surface, further dispersing the impact force and creating intermittent striking, which is beneficial for breaking and peeling off the brittle abrasive layer.

[0016] This invention incorporates a vibration isolator. An elastic pressure plate presses the sandpaper surface between the circulating flexible beater and the conveying roller assembly. With the help of a guide post and compression spring in the buffer connection assembly, the elastic pressure plate can float slightly with the vibration, thereby absorbing the mechanical vibration generated by the beater. This effectively isolates the vibration from being transmitted to the upstream and downstream conveying roller assemblies, preventing the sandpaper from deviating or shaking during the conveying process, and ensuring the continuity and uniformity of the cleaning process.

[0017] This invention relates to a self-cleaning tilting scraper with an airflow channel. The scraper body is made of a serrated blade composed of alternating convex teeth and grooves, which can reduce scraping resistance and form a chip removal channel. The branch air outlet of the airflow channel is set at the bottom of the groove. The abrasive particles accumulated in the groove are removed in real time by jetting air, preventing dust from clogging the blade or adhering to the surface of the convex teeth. At the same time, it can also perform air jet cleaning on the surface of sandpaper, improving the cleaning effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the vibration isolator part of the present invention; Figure 4 This is a schematic diagram of the structure of the circulating flexible beater in this invention. Figure 1 ; Figure 5 This is a schematic diagram of the structure of the circulating flexible beater in this invention. Figure 2 ; Figure 6 This is a cross-sectional view of the cylinder block structure in this invention; Figure 7 This is a three-dimensional structural diagram of the scraper body in this invention; Figure 8 This is a cross-sectional view of the scraper body in this invention.

[0020] Figure 9 This is a flowchart illustrating the method of using the present invention.

[0021] Reference numerals: 1. Frame; 100. Waste cloth-based sandpaper; 2. Circulating flexible beater; 21. Circulating drive mechanism; 211. Drive sprocket; 212. Driven sprocket; 213. Transmission chain; 214. Drive motor; 221. Connecting seat; 222. Beater body; 22. Flexible beater head; 3. Conveying clamping roller group; 31. Clamping roller pair; 311. Upper clamping roller; 312. Lower clamping roller; 313. Elastic roller surface; 314. Annular chip discharge groove; 315. Synchronous motor; 4. Vibration isolator; 41. Elastic pressure plate; 42. Crossbeam; 43. Buffer connection assembly; 431, guide post; 432, compression spring; 433, spring seat; 5, self-cleaning tilting scraper; 51, scraper body; 511, serrated blade; 511a, protruding tooth; 511b, groove; 52, airflow channel; 521, branch air passage; 54, pulse airflow generator; 541, cylinder body; 542, piston; 542a, piston rod; 543, transmission connecting rod; 543a, crank; 543b, connecting rod body; 544, inlet check valve; 545, outlet check valve; 6, hopper; 7, air tank. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] The present invention will be further described below with reference to embodiments.

[0024] Example 1 Reference Figures 1 to 8 This invention provides an environmentally friendly cloth-based sandpaper recycling and reuse device for peeling off the failed abrasive layer on waste cloth-based sandpaper 100 to recover the intact cloth base. The device includes a frame 1, a circulating flexible beater 2, a conveying clamping roller group 3, a vibration isolator 4, and a self-cleaning inclined scraper 5.

[0025] Specifically, the circulating flexible beater 2 is installed on the frame 1, and multiple flexible beaters 22 that can move in a cycle are installed inside it. The flexible beaters 22 beat the abrasive surface of the waste cloth-based sandpaper 100 at high frequency, causing the abrasive particles to loosen and fall off.

[0026] The conveyor roller group 3 is rotatably mounted on the frame 1, located upstream and downstream of the circulating flexible beater 2, and is used to stably convey waste cloth-based sandpaper 100.

[0027] Vibration isolator 4 is installed on frame 1, located between circulating flexible beater 2 and conveyor roller group 3. Its lower surface is attached to and presses against the upper surface of waste cloth-based sandpaper 100 to isolate the vibration generated when circulating flexible beater 2 is working and prevent the vibration from being transmitted to conveyor roller group 3.

[0028] The self-cleaning tilting scraper 5 is fixed on the frame 1 and located downstream of the circulating flexible beater 2. It has an airflow channel 52 embedded in the blade to thoroughly scrape off the abrasive particles that have been loosened by beating but have not yet detached. At the same time, it uses airflow to prevent abrasive particles from accumulating on the blade and to clean the abrasive particles from the surface of the sandpaper.

[0029] Specifically, the circulating flexible beater 2 includes a circulating drive mechanism 21 and multiple flexible beaters 22. The circulating drive mechanism 21 drives the multiple flexible beaters 22 to move along the conveying direction of the waste cloth-based sandpaper 100, and the linear velocity is equal to the conveying speed of the waste cloth-based sandpaper 100, so as to achieve relative stillness or micro-contact between the flexible beaters 22 and the surface of the sandpaper, thereby converting the beating force into high-frequency vibration or knocking perpendicular to the surface of the sandpaper, rather than frictional force along the conveying direction. This can effectively shake off the abrasive on the waste cloth-based sandpaper 100, while effectively avoiding scratches and dragging of the waste cloth-based sandpaper 100.

[0030] Specifically, the cyclic drive mechanism 21 includes a drive sprocket 211, a driven sprocket 212, and a transmission chain 213 surrounding the drive sprocket 211 and the driven sprocket 212. The drive sprocket 211 is connected to the output shaft of the drive motor 214, which is fixed on the frame 1. The roots of multiple flexible tapping heads 22 are fixed to the outer chain plate of the transmission chain 213 and are arranged at equal intervals along the extension direction of the transmission chain 213. When the transmission chain 213 rotates, these flexible tapping heads 22 circulate with the chain. The chain drive method operates smoothly, has good synchronization, and is easy to control precisely.

[0031] It should be noted that the flexible tapping head 22 includes a connecting seat 221 fixedly connected to the transmission chain 213, and a tapping body 222 detachably mounted on the connecting seat 221. The tapping body 222 is made of rubber or polyurethane flexible material, and its free end is an arc-shaped curved surface to increase the contact area between the tapping body 222 and the sandpaper, disperse the impact force, and avoid damage to the cloth base by sharp edges. The detachable connection method facilitates quick replacement of the tapping body 222 after wear.

[0032] It should also be noted that in the working section, i.e. the horizontal beating section near the waste cloth-based abrasive paper 100, there is a small gap between the free end of the beating body 222 and the abrasive surface of the waste cloth-based abrasive paper 100. This gap allows the flexible beating head 22 to impact the surface of the waste cloth-based abrasive paper 100 at a certain initial velocity when it moves with the chain, generating high-frequency impact vibration. This allows for the intermittent impact to break and peel off brittle abrasive particles, while effectively protecting the cloth base.

[0033] Specifically, the conveying roller group 3 includes multiple roller pairs 31 arranged sequentially along the conveying direction. Each roller pair 31 consists of an upper roller 311 and a lower roller 312 arranged vertically. Each upper roller 311 and lower roller 312 is driven by a synchronous motor 315, which is fixedly connected to the frame 1. The roller surfaces of the upper roller 311 and lower roller 312 are both elastic roller surfaces 313, that is, the upper roller 311 and lower roller 312 can be covered with a rubber layer to increase friction and protect the back of the sandpaper. In particular, multiple annular chip removal grooves 314 are spaced apart along the circumferential direction on the elastic roller surface 313. When the sandpaper passes through, a small amount of dust falling from the sandpaper can fall into the annular chip removal grooves 314 and be carried out and detached as the rollers rotate, preventing dust from accumulating on the roller surface and affecting the flatness and clamping force of the upper roller 311 and lower roller 312 conveying the sandpaper.

[0034] Specifically, the vibration isolator 4 also includes a crossbeam 42 fixed on the frame 1, and multiple buffer connection assemblies 43. Each buffer connection assembly 43 includes a guide post 431, a compression spring 432, and a spring seat 433. The upper end of the guide post 431 passes through the crossbeam 42 and slides with it. The lower end of the guide post 431 is fixedly connected to the upper surface of the elastic pressure plate 41. The compression spring 432 is sleeved on the guide post 431, and its upper and lower ends abut against the lower surface of the crossbeam 42 and the spring seat 433, respectively. On the upper surface, the spring seat 433 is fixed on the guide column 431. Under the elastic force of the compression spring 432, the elastic pressure plate 41 can always be pressed downward elastically onto the waste cloth-based sandpaper 100. When the vibration of the circulating flexible beater 2 is transmitted to the elastic pressure plate 41 through the waste cloth-based sandpaper 100, the elastic pressure plate 41 can drive the guide column 431 to move upward slightly to absorb and isolate the vibration, prevent the vibration from being transmitted to the frame 1 and other components through the crossbeam 42, and ensure the conveying stability of the waste cloth-based sandpaper 100.

[0035] Specifically, the blade of the self-cleaning tilting scraper 5 has a serrated blade 511, which consists of multiple alternating convex teeth 511a and grooves 511b along the length of the scraper body 51. This reduces the continuous contact area between the scraper body 51 and the sandpaper, thus reducing scraping resistance. At the same time, the grooves 511b also provide a channel for airflow and debris discharge. The airflow channel 52 includes multiple branch air passages 521 that are connected to the grooves 511b. The air outlet of each branch air passage 521 is located at the bottom of the corresponding groove 511b. The high-pressure gas ejected from the air outlet of the groove 511b can directly blow away the abrasive particles accumulated in the groove 511b, preventing the abrasive particles from adhering to the convex teeth 511a, thus achieving self-cleaning of the scraper body 51. At the same time, it can also perform air jet cleaning on the surface of the waste cloth-based sandpaper 100, improving the cleaning effect on the sandpaper.

[0036] It should be noted that the self-cleaning tilting scraper 5 also includes a pulse airflow generator 54. The pulse airflow generator 54 includes a cylinder body 541 fixed on the frame 1, a piston 542 that is sealed and slidably disposed in the cylinder body 541, and a transmission connecting rod 543. The cylinder body 541 is provided with an inlet one-way valve 544 and an outlet one-way valve 545. The outlet of the outlet one-way valve 545 is connected to the inlet end of the airflow channel 52 through a pipeline. When the piston 542 reciprocates, the external air is compressed into a pulse airflow by the action of the inlet one-way valve 544 and the outlet one-way valve 545, and sprayed out from the bottom of the groove 511b of the scraper body 51.

[0037] Specifically, an air tank 7 is fixedly connected to the frame 1, and an air inlet check valve 544 can be connected to the air tank 7 or the external environment, wherein the external environment must ensure air cleanliness.

[0038] Specifically, the transmission connecting rod 543 includes a crank 543a and a connecting rod body 543b. One end of the crank 543a is fixedly connected to the shaft of the driven sprocket 212 of the circulating flexible beater 2, and the other end is rotatably connected to one end of the connecting rod body 543b. The other end of the connecting rod body 543b is hinged to the piston rod 542a of the piston 542. When the drive sprocket 211 rotates, the piston 542 is driven to reciprocate in the cylinder 541 through the transmission of the crank 543a and the connecting rod body 543b. Since the power comes from the same power source that drives the flexible beater head 22, the frequency of the pulse airflow is synchronized with the beater head's beater frequency, so that the waste cloth-based sandpaper 100 can be intermittently cleaned by pulse jet cleaning while beating and scraping.

[0039] It should also be noted that, in order to prevent secondary pollution caused by the stripped abrasive particles, the device also includes a collection hopper 6, which is detachably connected to the frame 1 and located directly below the self-cleaning inclined scraper 5, for the purpose of collecting the scraped abrasive particles.

[0040] A method for using an environmentally friendly cloth-based sandpaper recycling and reuse device includes the following steps: S1. Waste cloth-based sandpaper 100 is conveyed by conveying clamping roller group 3, while vibration isolator 4 is used to press the sandpaper and isolate vibration. S2. The abrasive surface is subjected to high-frequency vertical tapping by the circulating flexible beater 2 at a linear speed equal to that of the sandpaper conveying speed, causing the abrasive particles to loosen and fall off. S3. The residual abrasive is scraped off by the self-cleaning tilting scraper 5 and the airflow is sprayed through the airflow channel 52 to clean the blade and sandpaper in real time, and the detached abrasive debris is collected into the collection hopper 6.

[0041] The working principle of this invention is as follows: Waste cloth-based abrasive paper 100 is fed in by the upstream conveyor roller group 3, and is pressed under the elastic pressure plate 41 of the vibration isolator 4. Then it enters the working area of ​​the circulating flexible beater 2. The drive motor 214 drives the drive sprocket 211 to rotate, and through the transmission chain 213, it drives multiple flexible beaters 22 to move at the same linear speed as the abrasive paper, performing high-frequency flexible beaters on its abrasive surface, causing most of the abrasive particles to loosen or fall off. After the initial beaters, the waste cloth-based abrasive paper 100 is pressed again by the downstream vibration isolator 4. Then, the self-cleaning inclined scraper 5 and the serrated blade 511 scrape away the residual abrasive. At the same time, the pulse airflow generated by the pulse airflow generator 54, which is synchronized with the beater frequency, is sprayed out from the bottom of the groove 511b to clean the accumulated debris on the scraper body 51. Finally, the clean waste cloth-based abrasive paper 100 is discharged by the downstream conveyor roller group 3, while the peeled abrasive particles fall into the collection hopper 6 for centralized recycling.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An environmentally friendly cloth-based sandpaper recycling and reuse device, characterized in that, include: Rack (1); A circulating flexible beater (2) is mounted on a frame (1). The circulating flexible beater (2) includes a circulating drive mechanism (21) and multiple flexible beaters (22). The circulating drive mechanism (21) drives the multiple flexible beaters (22) to move along the conveying direction of the waste cloth-based sandpaper (100), and the linear velocity is equal to the conveying speed of the waste cloth-based sandpaper (100). The conveyor roller assembly (3) is rotatably mounted on the frame (1) and located upstream and downstream of the circulating flexible beater (2); Vibration isolator (4) is installed on the frame (1) and located between the circulating flexible beater (2) and the conveying clamping roller group (3). The vibration isolator (4) includes an elastic pressure plate (41), the lower surface of which is attached to and presses against the upper surface of the waste cloth-based sandpaper (100). A self-cleaning tilting scraper (5) is fixed on a frame (1). The self-cleaning tilting scraper (5) includes a scraper body (51) and an airflow channel (52) embedded in the blade of the scraper body (51). The hopper (6) is detachably connected to the frame (1) and is located directly below the self-cleaning inclined scraper (5).

2. The environmentally friendly cloth-based sandpaper recycling and reuse device according to claim 1, characterized in that, The circulating drive mechanism (21) includes a drive sprocket (211), a driven sprocket (212), and a transmission chain (213) surrounding the drive sprocket (211) and the driven sprocket (212). The roots of the plurality of flexible tapping heads (22) are fixed to the outer chain plate of the transmission chain (213) and are arranged at equal intervals along the extension direction of the transmission chain (213). The drive sprocket (211) is connected to the output shaft of the drive motor (214), and the drive motor (214) is fixed on the frame (1).

3. The environmentally friendly cloth-based sandpaper recycling and reuse device according to claim 2, characterized in that, The flexible slapping head (22) includes a connecting seat (221) fixedly connected to the transmission chain (213) and a slapping body (222) detachably mounted on the connecting seat (221), wherein the free end of the slapping body (222) is an arc-shaped curved surface.

4. The environmentally friendly cloth-based sandpaper recycling and reuse device according to claim 3, characterized in that, When the striking body (222) is in the working section close to the waste cloth-based sandpaper (100), there is a gap between the free end of the striking body (222) and the abrasive surface of the waste cloth-based sandpaper (100).

5. The environmentally friendly cloth-based sandpaper recycling and reuse device according to claim 1, characterized in that, The conveying roller group (3) includes multiple roller pairs (31) arranged sequentially along the conveying direction. Each roller pair (31) consists of an upper roller (311) and a lower roller (312) arranged vertically and vertically. The roller surfaces of the upper clamping roller (311) and the lower clamping roller (312) are elastic roller surfaces (313), and multiple annular chip removal grooves (314) are spaced apart along the circumferential direction on the elastic roller surface (313).

6. The environmentally friendly cloth-based sandpaper recycling and reuse device according to claim 1, characterized in that, The vibration isolator (4) also includes a crossbeam (42) fixed on the frame (1) and multiple buffer connection assemblies (43); The buffer connection assembly (43) includes a guide post (431), a compression spring (432), and a spring seat (433). The upper end of the guide post (431) passes through the crossbeam (42) and slides with the crossbeam (42). The lower end of the guide post (431) is fixedly connected to the upper surface of the elastic pressure plate (41). The compression spring (432) is sleeved on the guide post (431), and the upper and lower ends of the compression spring (432) abut against the lower surface of the crossbeam (42) and the upper surface of the spring seat (433), respectively. The spring seat (433) is fixed on the guide post (431).

7. The environmentally friendly cloth-based sandpaper recycling and reuse device according to claim 1, characterized in that, The blade of the scraper body (51) is a serrated blade (511), which is composed of multiple convex teeth (511a) and grooves (511b) arranged alternately along the length of the scraper body (51). The airflow channel (52) includes multiple branch air passages (521) that are connected to the grooves (511b). The air outlet of each branch air passage (521) is located at the bottom of the corresponding groove (511b).

8. The environmentally friendly cloth-based sandpaper recycling and reuse device according to claim 7, characterized in that, The self-cleaning tilting scraper (5) also includes a pulse airflow generator (54), which includes a cylinder body (541) fixed on the frame (1), a piston (542) that is sealed and slidably disposed in the cylinder body (541), and a transmission connecting rod (543). The cylinder body (541) is provided with an inlet one-way valve (544) and an outlet one-way valve (545), and the outlet of the outlet one-way valve (545) is connected to the inlet end of the airflow channel (52).

9. The environmentally friendly cloth-based sandpaper recycling and reuse device according to claim 8, characterized in that, The transmission connecting rod (543) includes a crank (543a) and a connecting rod body (543b). One end of the crank (543a) is fixedly connected to the driven sprocket (212), and the other end is rotatably connected to one end of the connecting rod body (543b). The other end of the connecting rod body (543b) is hinged to the piston rod (542a) of the piston (542).

10. A method of using an environmentally friendly cloth-based sandpaper recycling and reuse device according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Waste cloth-based sandpaper (100) is conveyed by conveying clamping roller group (3), and at the same time, the sandpaper is pressed and vibration is isolated by vibration isolator (4); S2. The abrasive surface is subjected to high-frequency vertical tapping by a circulating flexible beater (2) at a linear speed equal to that of the sandpaper conveying speed, so that the abrasive particles are loosened and fall off. S3. The residual abrasive is scraped off by the self-cleaning tilting scraper (5) and the airflow is sprayed through the airflow channel (52) to clean the blade and sandpaper in real time, and the fallen abrasive debris is collected into the collection hopper (6).

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