Pretreatment equipment for mixing recovered powder of retired wind power blade and PVC (Polyvinyl Chloride) material

Abstract

The invention relates to retired wind power blade recovery powder and PVC material mixing pretreatment equipment, which comprises an etching box, a transverse support, a PVC material mixing device, a PVC material mixing device, a PVC material mixing device, a PVC material mixing device, a PVC material mixing device, a PVC material mixing device, a PVC material mixing device, a PVC material mixing device and an etching device, the circulating mechanism is arranged in the etching box and is in transmission connection with the motor, and the motor drives the circulating mechanism to enable the etching liquid and the recycled powder particles to circularly flow in the etching box; the stirring and dispersing mechanism is arranged in the etching box, and the circulating mechanism drives the stirring and dispersing mechanism to stir and disperse recovered powder in the etching liquid and scrape powder particles adhered to the inner side wall of the etching box; and the spraying mechanism is communicated with the etching box through a pipeline, and the circulating mechanism drives the spraying mechanism to spray the etching liquid into the etching box. According to the pre-treatment equipment for mixing the recovered powder of the retired wind power blade and the PVC material, the recovered powder of the wind power blade is quickly, efficiently and uniformly etched and cleaned, and performance reduction caused by excessive etching of the recovered powder of the wind power blade is avoided.

Description

Technical Field

[0001] This invention relates to the field of wind turbine blade recycling and processing, specifically to a pretreatment device for mixing recycled powder from decommissioned wind turbine blades with PVC materials. Background Technology

[0002] When retired wind turbine blades are mechanically crushed or ground into powder, the powder particles exhibit the following problems: Resin residue: The powder surface is coated with an irregular, aged and degraded resin layer; Weak interfacial bonding: The residual resin has poor interfacial bonding with the new matrix material (such as cement, plastic); Pollution and degradation: During service, the surface may adsorb pollutants such as grease and metal particles, and the resin itself may also undergo oxidation.

[0003] These surface problems will severely limit the application of recycled powder: In cement concrete: the resin layer can hinder cement hydration and reduce strength; In thermoplastics: poor compatibility between resin and plastic leads to a decrease in the mechanical properties of composite materials.

[0004] Therefore, it is necessary to chemically etch and clean the surface of these recycled wind turbine blade powder particles to improve the interfacial bonding with the new substrate. However, excessive etching will lead to the loss of fiber components and greatly reduce the strength of the material. Therefore, it is necessary to carry out sufficient surface etching and cleaning in a short time. In view of this, we propose a pretreatment equipment for mixing recycled wind turbine blade powder with PVC material. Summary of the Invention

[0005] The purpose of this invention is to provide a pretreatment device for mixing recycled powder from decommissioned wind turbine blades with PVC materials, thereby solving the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a pretreatment device for mixing recycled powder from decommissioned wind turbine blades with PVC materials, comprising an etching box fixed on a frame, and a feeding pipe with a control valve at the bottom of the etching box, and further comprising: A cross brace is fixed to the frame, and a motor is fixed to the bottom of the cross brace; A circulation mechanism is installed inside the etching chamber. The circulation mechanism is connected to a motor drive, and the motor drives the circulation mechanism to circulate the etching solution and recycled powder particles within the etching chamber. The agitation mechanism is installed inside the etching chamber, and the circulation mechanism drives the agitation mechanism to agitate and disperse the recovered powder in the etching solution and scrape off the powder particles adhering to the inner wall of the etching chamber. The spraying mechanism is connected to the etching chamber via a pipeline, and the circulation mechanism drives the spraying mechanism to spray the etching solution into the etching chamber.

[0006] Preferably, the etching chamber has a conical structure with a thicker top and a thinner bottom in the middle, a spherical cover plate structure at the top, and a circular straight cylinder structure with a closed bottom at the bottom. The feeding pipe is set on the spherical cover plate structure, and a discharge valve is embedded in the bottom surface of the etching chamber, and the discharge valve is connected to the discharge pipe.

[0007] Preferably, the agitation mechanism includes a bushing that passes through and is rotatably connected to the center of the bottom of the etching chamber. Multiple scrapers are fixed at equal intervals along the circumferential direction on the circumferential wall of one end of the bushing inside the etching chamber. Two scrapers have scraper strips fixed at their ends away from the bushing. The scrapers are in close contact with the inner bottom surface of the etching chamber and are set at an angle of 40° to 50°. The two scraper strips are symmetrically arranged and are in close contact with the inner side wall of the etching chamber. The lower end of the bushing is coaxially fixedly connected to a turntable, and the bottom surface of the turntable is coaxially fixedly connected to a gear ring.

[0008] Preferably, the circulation mechanism includes a shaft 2 that is inserted into and rotatably connected to a bushing. An impeller is fixed at the upper end of the shaft 2, and a gear 4 is fixed at the lower end of the shaft 2. The gear 4 is connected to a gear ring via a gear 5. The gear 5 is rotatably connected to the upper end of a support rod, and the support rod is fixed to a cross brace.

[0009] Preferably, the bottom center of gear four is coaxially fixedly connected to a tube shaft, and the lower end of the tube shaft is inserted into and slidably connected to a multi-faceted rod. The lower end of the multi-faceted rod is coaxially fixedly connected to shaft one. Shaft one passes through and is rotatably connected to a cross brace. Gear one is coaxially fixedly connected to shaft one. The output shaft end of the motor is connected to gear two for transmission, and gear two meshes with gear one.

[0010] Preferably, an annular oil groove and multiple longitudinal oil grooves are provided on the inner side of the tube shaft, and oil passages are provided at the center lines of the multi-faceted rod and the shaft. A lubricating oil box is fixed at the lower end of the frame, and a cap is fixed on the lubricating oil box. The cap is installed and rotatably connected to the lower end of the shaft, and the lower end of the cap is connected to the lubricating oil box through a suction tube.

[0011] Preferably, the circulation mechanism further includes a column, and the upper outer wall of the column is fixedly connected to the middle of the two scrapers by two connecting rods respectively. The lower edge of the column is provided with a notch. The column and the shaft share the same central axis. The impeller is located inside the column.

[0012] Preferably, the spraying mechanism includes a spray pipe and a circulating pump and an etching liquid tank fixed at the bottom of the frame. A drain valve is provided at the lower end of the side wall of the etching liquid tank. Gear 1 is connected to the circulating pump via gear 3. The circulating pump is connected to the etching liquid tank and cap 2 via conduit 1. Cap 2 is fixed at the center of the top of the etching box. The spray pipe is fixed at the upper end of the two scrapers. Conduit 3 is fixed and connected to the middle of the spray pipe. Conduit 3 passes through and is rotatably connected to the center of the top of the etching box. Cap 2 is fitted and rotatably connected to the upper end of conduit 3.

[0013] Preferably, the bottom of the etching chamber is connected to the etching liquid tank via a second conduit. A filter screen is embedded at the connection between the bottom of the etching chamber and the second conduit. A ball valve is installed on the second conduit and is fixed to the etching liquid tank. A buoyancy control mechanism for controlling the opening and closing of the ball valve is installed on the etching liquid tank.

[0014] Preferably, the buoyancy control mechanism includes a slide fixed to the ball valve body, a rack slidably connected to the slide, the upper end of the rack being connected to the slide via a spring, a slide rod fixedly connected to the lower end of the rack, a gear six coaxially fixedly connected to the valve stem of the ball valve, and the rack meshing with the gear six, a sliding sleeve penetrating and fixedly connected to the top wall of the etching liquid tank, and a slide rod inserted into and slidably connected within the sliding sleeve, the lower end of the slide rod being connected to a float via a pull rope.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, a circulation mechanism drives a spraying mechanism to spray a portion of the etching solution into the etching chamber. Simultaneously, the circulation mechanism drives a stirring mechanism to agitate and disperse the recovered powder in the etching solution and scrape off powder particles adhering to the inner sidewall of the etching chamber, thus preventing over-etching of some of the recovered powder. Furthermore, the circulation mechanism circulates the etching solution and recovered powder particles within the etching chamber, achieving rapid, efficient, and uniform etching and cleaning of the recovered wind turbine blade powder, preventing performance degradation caused by over-etching of the recovered wind turbine blade powder. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall assembly cross-section of the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A in the diagram; Figure 3 This is a schematic diagram showing the angle of contact between the scraper and the bottom surface inside the etching chamber in this invention; Figure 4 This is a schematic diagram of a cross-sectional structure of the tube shaft, polygonal rod, and shaft in this invention; Figure 5 for Figure 1 Enlarged structural diagram at point B in the diagram; Figure 6 for Figure 1 A magnified structural diagram at point C in the diagram.

[0017] In the diagram: 1. Frame; 2. Etching chamber; 3. Gear 1; 4. Shaft 1; 5. Cap 1; 6. Notch; 7. Feed pipe; 8. Control valve; 9. Scraper; 10. Connecting rod; 11. Cap 2; 12. Spray pipe; 13. Column; 14. Impeller; 15. Shaft 2; 16. Scraper; 17. Discharge pipe; 18. Cross brace; 19. Motor; 20. Gear 2; 21. Suction pipe; 22. Lubricating oil box; 23. Gear 3; 24. Circulating pump; 25. Pipe 1; 26. Discharge. 27. Valve; 28. Etching fluid tank; 29. ​​Drain valve; 30. Conduit 2; 31. Float; 32. Pull rope; 33. Bushing; 34. Turntable; 35. Gear ring; 36. Gear 4; 37. Gear 5; 38. Support rod; 39. Pipe shaft; 40. Multi-faceted rod; 41. Filter screen; 42. Conduit 3; 43. Annular oil groove; 44. Ball valve; 45. Gear 6; 46. Slide; 47. Rack; 48. Spring; 49. Slide rod; 50. Slide sleeve; 51. Oil passage; 52. Longitudinal oil groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 6 The present invention provides a technical solution: a pretreatment device for mixing recycled powder from decommissioned wind turbine blades with PVC material, including an etching box 2 fixed on a frame 1, and a feeding pipe 7 with a control valve 8 at the bottom of the etching box 2, and further including: A cross brace 18 is fixed on the frame 1, and a motor 19 is fixed at the bottom of the cross brace 18; A circulation mechanism is installed inside the etching chamber 2. The circulation mechanism is connected to the motor 19 for transmission. The motor 19 drives the circulation mechanism to circulate the etching liquid and recycled powder particles within the etching chamber 2. The agitation mechanism is installed inside the etching chamber 2, and the circulation mechanism drives the agitation mechanism to agitate and disperse the recovered powder in the etching solution and scrape off the powder particles adhering to the inner wall of the etching chamber 2. The spraying mechanism is connected to the etching chamber 2 via a pipeline, and the circulation mechanism drives the spraying mechanism to spray the etching solution into the etching chamber 2.

[0020] In this embodiment, the middle part of the etching chamber 2 is a conical structure with a thicker top and a thinner bottom, the upper part is a spherical cover plate structure, and the bottom is a circular straight cylinder structure with a closed bottom. The feeding pipe 7 is set on the spherical cover plate structure. The bottom surface of the etching chamber 2 is embedded with a discharge valve 26, and the discharge valve 26 is connected to the discharge pipe 17.

[0021] In this embodiment, the agitation mechanism includes a bushing 32 that passes through and is rotatably connected to the center of the bottom of the etching chamber 2. Multiple scrapers 16 are fixed at equal intervals along the circumferential direction on one end of the bushing 32 inside the etching chamber 2. Two scrapers 16 have scraper strips 9 fixed at their ends away from the bushing 32. The scrapers 16 are in contact with the inner bottom surface of the etching chamber 2 and are set at an angle of 40° to 50°. The two scraper strips 9 are symmetrically arranged and are in contact with the inner sidewall of the etching chamber 2. The lower end of the bushing 32 is coaxially fixedly connected to a turntable 33, and the bottom surface of the turntable 33 is coaxially fixedly connected to a gear ring 34.

[0022] In this embodiment, the circulation mechanism includes a second shaft 15 inserted into and rotatably connected to a bushing 32. An impeller 14 is fixed to the upper end of the second shaft 15, and a gear 35 is fixed to the lower end of the second shaft 15. The gear 35 is connected to a gear ring 34 via a gear 36. The gear 36 is rotatably connected to the upper end of a support rod 37, and the support rod 37 is fixed to a cross brace 18. The bottom center of the gear 35 is coaxially fixedly connected to a tube shaft 38, and the lower end of the tube shaft 38 is inserted into and slidably connected to a multi-faceted rod 39. The lower end of the multi-faceted rod 39 is coaxially fixedly connected to a first shaft 4, which passes through and is rotatably connected to the first shaft 4. The motor 19 is connected to the cross brace 18. Gear 3 is coaxially fixedly connected to shaft 4. The output shaft of motor 19 is connected to gear 20. Gear 20 meshes with gear 3. An annular oil groove 42 and multiple longitudinal oil grooves 51 are provided on the inner side of the tube shaft 38. Oil passages 50 are provided at the center lines of the multi-faceted rod 39 and shaft 4. A lubricating oil box 22 is fixed at the lower end of the frame 1. A cap 5 is fixed on the lubricating oil box 22. The cap 5 is fitted and rotatably connected to the lower end of shaft 4. The lower end of the cap 5 is connected to the lubricating oil box 22 through a suction tube 21.

[0023] In this embodiment, the circulation mechanism also includes a column cylinder 13, and the upper outer wall of the column cylinder 13 is fixedly connected to the middle of the two scraper blades 9 by two connecting rods 10 respectively. The lower edge of the column cylinder 13 is provided with a notch 6. The column cylinder 13 and the shaft 15 share the same central axis. The impeller 14 is located inside the column cylinder 13.

[0024] In this embodiment, the spraying mechanism includes a spray pipe 12, a circulating pump 24 fixed to the bottom of the frame 1, and an etching liquid tank 27. The etching liquid tank 27 has an injection port (not shown in this application). A drain valve 28 is provided at the lower end of the side wall of the etching liquid tank 27. Gear 1 3 is connected to the circulating pump 24 via gear 3 23. The circulating pump 24 is connected to the etching liquid tank 27 and the cap 2 11 via a conduit 1 25. The cap 2 11 is fixed at the center of the top of the etching tank 2. The spray pipe 12 is fixed to the upper ends of the two scrapers 9. The middle part of the etching tank 2 is fixed and connected to the conduit 3 41. The conduit 3 41 passes through and is rotatably connected to the top center of the etching tank 2. The cap 2 11 is fitted and rotatably connected to the upper end of the conduit 3 41. The bottom of the etching tank 2 is connected to the etching liquid tank 27 through the conduit 2 29. A filter screen 40 is embedded at the connection between the bottom of the etching tank 2 and the conduit 2 29. A ball valve 43 is provided on the conduit 2 29 and the ball valve 43 is fixed on the etching liquid tank 27. A buoyancy control mechanism is provided on the etching liquid tank 27 to control the opening and closing of the ball valve 43.

[0025] In this embodiment, the buoyancy control mechanism includes a slide 45 fixed on the valve body of the ball valve 43, a rack 46 slidably connected to the slide 45, and the upper end of the rack 46 connected to the slide 45 by a spring 47. The lower end of the rack 46 is fixedly connected to a slide rod 48. A gear six 44 is coaxially fixedly connected to the valve stem of the ball valve 43, and the rack 46 and gear six 44 are meshed together. A sliding sleeve 49 is penetrated and fixedly connected to the top wall of the etching liquid tank 27, and the slide rod 48 is inserted into and slidably connected in the sliding sleeve 49. The lower end of the slide rod 48 is connected to the float 30 by a pull rope 31.

[0026] Working principle and advantages of this invention: The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material operates as follows: like Figures 1 to 6 As shown, firstly, a set amount of etching solution is injected into the etching solution tank 27 through the injection port. The level of the etching solution prevents the float 30 from exerting a downward force on the slide bar 48 through the pull rope 31. As a result, the rack 46 does not move down under the action of the spring 47, and the ball valve 43 remains closed. The motor 19 is started, which drives the gear 3 through the gear 20 to rotate. The gear 3 then drives the shaft 4 to rotate. The gear 3 also drives the circulation pump 24 through the gear 3 23. The control valve 8 is opened and the recycled wind turbine blade powder is fed into the etching tank 2 through the feeding pipe 7. After the feeding is completed, the control valve 8 is closed.

[0027] After the circulating pump 24 starts working, the etching solution in the etching solution tank 27 is transported through the first conduit 25 to the spray pipe 12 via the second cap 11 and the third conduit 41 and sprayed into the etching tank 2. At the same time, the shaft 4 rotates and the multi-faceted rod 39 drives the tube shaft 38 and the gear 4 35 to rotate. This causes the gear 4 35 to drive the gear ring 34 and the turntable 33 to rotate through the gear 5 36. In turn, the turntable 33 drives the scraper 16 and the scraper 9 to rotate through the bushing 32. This causes the scraper 16 to disperse the recovered wind turbine blade powder, so that the recovered wind turbine blade powder is evenly contacted with the etching solution. The gear 4 35... While rotating, the impeller 14 is driven to rotate via shaft 2 15. When the etching liquid in the etching box 2 reaches a certain amount, such as two-thirds of the internal capacity of the etching box 2, the impeller 14 is sufficient to spray the etching liquid onto the inner top surface of the etching box 2. The impeller 14 drives the etching liquid to carry the recovered wind turbine blade powder from the bottom of the column 13 upward to the spherical top surface of the etching box 2, and disperses along the top surface of the etching box 2. This cycle ensures that the recovered wind turbine blade powder is fully agitated and comes into contact with the etching liquid. The scraper 9 scrapes off the recovered wind turbine blade powder adhering to the inner wall of the etching box 2.

[0028] As the etching fluid in the etching fluid tank 27 gradually decreases, the float 30 gradually descends, and the pull force on the slide bar 48 gradually increases through the pull rope 31, thereby causing the slide bar 48 to apply a downward force to the rack 46, which in turn causes the rack 46 to move down and compress the spring 47. After the rack 46 moves down, the ball valve 43 is gradually opened through the gear six 44, allowing the etching fluid in the etching tank 2 to flow back into the etching fluid tank 27 through the filter screen 40 and the conduit two 29, and maintaining a sufficient amount of etching fluid in the etching tank 2 at all times, so that the etching fluid forms a circulating flow. By providing a small amount of etching fluid in the early stage, it is avoided that a large amount of etching fluid is added at once, which would cause some of the recovered wind turbine blade powder to be over-etched. During the rotation of the scraper 16, the recovered wind turbine blade powder on the filter screen 40 is scraped off to avoid blockage.

[0029] As mentioned earlier, the transmission method using the multi-faceted rod 39 and the tube shaft 38 can reduce the impact of vibrations generated during the etching process on the shaft 4 and the motor 19, thereby protecting the shaft 4 and the motor 19. Furthermore, during the up-and-down vibration of the tube shaft 38, suction and compression forces are generated, causing the lubricating oil in the lubricating oil box 22 to flow back and forth in the suction pipe 21, oil channel 50, longitudinal oil groove 51, and annular oil groove 42, thereby lubricating and cooling the tube shaft 38 and the multi-faceted rod 39.

[0030] After etching is completed, the discharge valve 26 is opened to allow the etching solution and the recovered wind turbine blade powder to be discharged together through the discharge pipe 17. The etching solution is in a flowing state, which facilitates the removal of the recovered wind turbine blade powder. The scraper 16 can easily scrape the recovered wind turbine blade powder off the bottom surface of the etching chamber 2. The etching solution sprayed from the spray pipe 12 can wash the recovered wind turbine blade powder adhering to the surface of the internal structure, thereby achieving a self-cleaning effect until the recovered wind turbine blade powder is completely discharged. Then, the motor 19 is turned off and the drain valve 28 is opened to discharge the residual etching solution waste liquid. When cleaning the inside of the etching chamber 2, cleaning solution is injected into the etching solution tank 27 and the motor 19 is started to perform the above operation, so that the inside of the etching chamber 2 is thoroughly cleaned.

[0031] When etching the wind turbine blade powder for the next time, simply follow the steps above. The entire equipment can quickly, efficiently and evenly etch and clean the wind turbine blade powder, avoiding excessive etching that could reduce performance.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A pretreatment device for mixing decommissioned wind turbine blade recycled powder with PVC material, comprising an etching box (2) fixed on a frame (1), and a feeding pipe (7) with a control valve (8) is provided at the bottom of the etching box (2), characterized in that: Also includes: A cross brace (18) is fixed on the frame (1), and a motor (19) is fixed at the bottom of the cross brace (18). A circulation mechanism is installed inside the etching chamber (2), which is connected to a motor (19) for transmission. The motor (19) drives the circulation mechanism to circulate the etching liquid and recycled powder particles within the etching chamber (2). The stirring mechanism is set inside the etching chamber (2), and the circulation mechanism drives the stirring mechanism to stir and disperse the recovered powder in the etching solution and scrape off the powder particles adhering to the inner wall of the etching chamber (2). The spraying mechanism is connected to the etching chamber (2) via a pipeline, and the circulation mechanism drives the spraying mechanism to spray the etching liquid into the etching chamber (2).

2. The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material according to claim 1, characterized in that: The etching chamber (2) has a conical structure with a thicker top and a thinner bottom in the middle, a spherical cover plate structure at the top, and a circular straight cylinder structure with a closed bottom at the bottom. The feeding pipe (7) is set on the spherical cover plate structure. The bottom surface of the etching chamber (2) is fitted with a discharge valve (26), and the discharge valve (26) is connected to the discharge pipe (17).

3. The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material according to claim 2, characterized in that: The stirring mechanism includes a bushing (32) that runs through and is rotatably connected to the center of the bottom of the etching chamber (2). Multiple scrapers (16) are fixed at equal intervals along the circumferential direction on one end of the bushing (32) inside the etching chamber (2). Two scrapers (16) have scraper strips (9) fixed at the ends away from the bushing (32). The scrapers (16) are in contact with the inner bottom surface of the etching chamber (2) and are set at an angle of 40° to 50°. The two scraper strips (9) are symmetrically arranged and are in contact with the inner side wall of the etching chamber (2). The lower end of the bushing (32) is coaxially fixedly connected to a turntable (33), and the bottom surface of the turntable (33) is coaxially fixedly connected to a gear ring (34).

4. The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material according to claim 3, characterized in that: The circulation mechanism includes a shaft 2 (15) inserted and rotatably connected to a bushing (32). An impeller (14) is fixed at the upper end of the shaft 2 (15), and a gear 4 (35) is fixed at the lower end of the shaft 2 (15). The gear 4 (35) is connected to the gear ring (34) via a gear 5 (36). The gear 5 (36) is rotatably connected to the upper end of a support rod (37), and the support rod (37) is fixed on a cross brace (18).

5. The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material according to claim 4, characterized in that: The bottom center of the gear four (35) is coaxially fixedly connected to the tube shaft (38), and the lower end of the tube shaft (38) is inserted into and slidably connected to the multi-faceted rod (39). The lower end of the multi-faceted rod (39) is coaxially fixedly connected to the shaft rod one (4). The shaft rod one (4) passes through and is rotatably connected to the cross brace (18). The gear one (3) is coaxially fixedly connected to the shaft rod one (4). The output shaft end of the motor (19) is connected to the gear two (20) for transmission, and the gear two (20) meshes with the gear one (3).

6. The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material according to claim 5, characterized in that: The inner side of the tube shaft (38) is provided with an annular oil groove (42) and multiple longitudinal oil grooves (51). Oil passages (50) are provided at the center lines of the multi-faceted rod (39) and the shaft (4). A lubricating oil box (22) is fixed at the lower end of the frame (1), and a cap (5) is fixed on the lubricating oil box (22). The cap (5) is fitted and rotatably connected to the lower end of the shaft (4), and the lower end of the cap (5) is connected to the lubricating oil box (22) through a suction tube (21).

7. The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material according to claim 4, characterized in that: The circulation mechanism also includes a column (13), and the upper outer wall of the column (13) is fixedly connected to the middle of two scrapers (9) by two connecting rods (10). The lower edge of the column (13) is provided with a notch (6). The column (13) and the shaft (15) share the same central axis. The impeller (14) is located inside the column (13).

8. The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material according to claim 5, characterized in that: The spraying mechanism includes a spray pipe (12) and a circulating pump (24) and an etching liquid tank (27) fixed at the bottom of the frame (1). A drain valve (28) is provided at the lower end of the side wall of the etching liquid tank (27). The gear one (3) is connected to the circulating pump (24) through the gear three (23). The circulating pump (24) is connected to the etching liquid tank (27) and the cap two (11) through the conduit one (25). The cap two (11) is fixed at the center of the top of the etching box (2). The spray pipe (12) is fixed at the upper end of the two scrapers (9). The middle part of the spray pipe (12) is fixed and connected to the conduit three (41). The conduit three (41) passes through and is rotatably connected to the center of the top of the etching box (2). The cap two (11) is fitted and rotatably connected to the upper end of the conduit three (41).

9. The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material according to claim 8, characterized in that: The bottom of the etching tank (2) is connected to the etching liquid tank (27) through the second conduit (29). A filter screen (40) is embedded at the connection between the bottom of the etching tank (2) and the second conduit (29). A ball valve (43) is provided on the second conduit (29), and the ball valve (43) is fixed on the etching liquid tank (27). A buoyancy control mechanism for controlling the opening and closing of the ball valve (43) is provided on the etching liquid tank (27).

10. The pretreatment equipment for mixing decommissioned wind turbine blade recycled powder with PVC material according to claim 9, characterized in that: The buoyancy control mechanism includes a slide (45) fixed on the valve body of the ball valve (43), a rack (46) slidably connected to the slide (45), and the upper end of the rack (46) is connected to the slide (45) by a spring (47). The lower end of the rack (46) is fixedly connected to a slide rod (48). The valve stem of the ball valve (43) is coaxially fixedly connected to a gear six (44), and the rack (46) is meshed with the gear six (44). A sliding sleeve (49) is penetrated and fixedly connected to the top wall of the etching liquid tank (27), and the slide rod (48) is inserted and slidably connected in the sliding sleeve (49). The lower end of the slide rod (48) is connected to a float (30) by a pull rope (31).

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