Double-cone drying machine for producing halogen-free flame retardant

Abstract

The utility model discloses a double-cone drying machine for producing halogen-free flame retardant, which comprises a double-cone drying machine, the top end of the double-cone drying machine is fixedly connected with a first sealing cover through a plurality of screws, the bottom end of the double-cone drying machine is in threaded connection with a second sealing cover, and the inner wall of the bottom end of the double-cone drying machine is fixedly connected with a plurality of fixing rods. One end of the fixing rod is fixedly connected with a first limiting ring, the middle of the first limiting ring is rotationally connected with a second limiting ring, the middle of the second limiting ring is fixedly connected with a fixing sleeve, and the middle of the fixing sleeve is fixedly connected with a rotating shaft. Compared with the prior art, the connecting lantern ring drives the scraper frame to rotate, powder attached to the inner wall of the double-cone drying machine is scraped off, collection and cleaning of the powder on the inner wall of the double-cone drying machine are facilitated, and it is avoided that powdery ethyl propyl isobutyl aluminum hypophosphite is repeatedly dried, and then the using effect of the ethyl propyl isobutyl aluminum hypophosphite is affected.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, and in particular to a double cone dryer for the production of halogen-free flame retardants. Background Technology

[0002] The double cone dryer is a new type of dryer that integrates mixing and drying. The double cone dryer is a double cone-shaped rotating tank. Under vacuum conditions, steam or hot water is introduced into the jacket for heating. The heat comes into contact with the wet material through the inner wall of the tank. The water vapor evaporated after the wet material absorbs heat is drawn away by the vacuum pump through the vacuum exhaust pipe. Because the tank is under vacuum and the rotation of the tank causes the material to tumble up and down and inside and out, the drying speed of the material is accelerated, the drying efficiency is improved, and the purpose of uniform drying is achieved.

[0003] In the prior art, Chinese patent CN221859070U discloses a double cone dryer. Gear five drives a crushing rod to rotate inside the tank. When the crushing rod rotates, it drives the wet material through, and together with the middle rod, it crushes the wet material. At the same time, when cone tank one and cone tank two rotate, they work with the inclined plate to scrape off the wet material on the inner wall, so that the material inside the tank is fully mixed. However, in practical applications, when using a double cone dryer to dry halogen-free flame retardants, the temperature inside the double cone dryer needs to be maintained at 110~120℃ and the atmospheric pressure at -0.05~-0. The powder is dried at 0.7 MPa for 1-2 hours to obtain white powdered ethylpropyl isobutyl aluminum hypophosphite (AHP). During the drying process, the powder generated in the double cone dryer may adhere to the inner wall of the dryer. Due to the small inlet and outlet of the double cone dryer, the powder adhering to the dryer is difficult to remove and will participate in the next drying of the halogen-free flame retardant, causing over-drying of the powdered ethylpropyl isobutyl aluminum hypophosphite, which in turn affects its usability. Therefore, we disclose a double cone dryer for the production of halogen-free flame retardants. Utility Model Content

[0004] The purpose of this invention is to provide a double cone dryer for the production of halogen-free flame retardants, in order to solve the problem of over-drying of powdered ethylpropyl isobutyl aluminum hypophosphite mentioned in the background art, which in turn affects the use of ethylpropyl isobutyl aluminum hypophosphite.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-cone dryer for the production of halogen-free flame retardants, comprising a double-cone dryer, a first sealing cover fixedly connected to the top of the double-cone dryer by a plurality of screws, a second sealing cover threadedly connected to the bottom of the double-cone dryer, a plurality of fixing rods fixedly connected to the inner wall of the bottom of the double-cone dryer, a first limiting ring fixedly connected to one end of each fixing rod, a second limiting ring rotatably connected to the middle of the first limiting ring, a fixing sleeve fixedly connected to the middle of the second limiting ring, a rotating shaft fixedly connected to the middle of the fixing sleeve, connecting rings movably sleeved at both ends of the fixing sleeve, a scraper frame fixedly connected to the outer wall of the connecting ring, the scraper frame fitting against the inner wall of the double-cone dryer, a limiting tube movably sleeved at the upper end of the rotating shaft, the limiting tube being fixedly connected to the first sealing cover, the outer wall of the fixing sleeve being a regular polygon, and the inner walls of the connecting ring and the second limiting ring being regular polygons adapted to the fixing sleeve.

[0006] Preferably, a scraper plate is rotatably connected to the lower end of one end of the scraper frame, and a spring is fixedly connected to the lower end of the other end of the scraper frame. One end of the spring is fixedly connected to the upper end of the scraper plate, the lower end of the scraper plate is in contact with the scraper frame at the other end, one side of the scraper plate is in contact with the double cone dryer, and two first limiting frames are movably sleeved in the middle of the fixed sleeve. A first connecting rod is fixedly connected between the two first limiting frames, and the two first limiting frames are respectively fixedly connected to the two scraper frames. The inner wall of the first limiting frame is a regular polygon.

[0007] Preferably, the first limiting frame includes a rotating shaft and a collar, the rotating shaft is fixedly connected to the collar, the collar is fixedly connected to the first connecting rod and movably sleeved with the fixed sleeve, a stirring fan is rotatably connected to the middle of the rotating shaft, and the rotating shaft is relatively parallel to the transverse central axis of the double cone dryer.

[0008] Preferably, a vacuum exhaust pipe is fixedly connected to the middle of the double cone dryer, and the diameter of the vacuum exhaust pipe is smaller than the length of the scraper plate.

[0009] Preferably, the second limiting ring is a cross-shaped ring, the first limiting ring is an L-shaped ring, and both the second limiting ring and the fixing sleeve extend to the outside of the first limiting ring.

[0010] Preferably, a second connecting rod is movably sleeved in the middle of the second sealing cover. A connecting sleeve is fixedly connected to one end of the second connecting rod located in the inner cavity of the double cone dryer. The inner wall of the connecting sleeve is a regular polygon and is movably sleeved with the fixed sleeve that extends to the outside of the first limiting ring. A limiting rod is movably engaged at one end of the second connecting rod extending to the outside of the second sealing cover. A spring is fixedly connected to one end of the limiting rod, and a second limiting frame is fixedly connected to one end of the spring. The second limiting frame is fixedly connected to the second sealing cover, and the limiting rod is movably sleeved with the second limiting frame.

[0011] Preferably, both the limiting rod and the second connecting rod are T-shaped.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the double cone dryer can be sealed by the cooperation of the first sealing cover and the second sealing cover. The double cone dryer fixes the position of the first limiting ring by the fixing rod, so that the first limiting ring restricts the rotation position of the fixing sleeve and the rotating shaft by the second limiting ring. The first sealing cover restricts the rotation position of the rotating shaft by the limiting tube, maintaining the stability of the rotating shaft and the fixing sleeve when rotating. When the fixing sleeve rotates, it will drive the connecting sleeve to rotate, which in turn drives the scraper frame to rotate, scraping off the powder attached to the inner wall of the double cone dryer. This facilitates the collection and cleaning of the powder on the inner wall of the double cone dryer, avoids the repeated drying of powdered ethylpropyl isobutyl hypophosphite, which would affect the use effect of powdered ethylpropyl isobutyl hypophosphite, and also avoids the repeated drying of powder affecting the quality of the finished product of the subsequently dried powder.

[0013] The operator can open the first sealing cover, pull out the fixing sleeve and rotating shaft, so that the scraper frame is no longer restricted. Then, the scraper frame and stirring fan can be pulled out from the top of the double cone dryer and removed from the inner cavity of the double cone dryer. The scraper frame and stirring fan can be cleaned to prevent powder from adhering to the outer wall of the scraper frame and stirring fan after long-term operation, which would affect the use. Disassembly is simple and convenient, and cleaning is easy. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a partially cut-away three-dimensional structural diagram of the double cone dryer of this utility model;

[0016] Figure 3 This is a partially cutaway three-dimensional structural diagram of the second sealing cap of this utility model;

[0017] Figure 4 This utility model Figure 3 A magnified three-dimensional structural diagram at point A;

[0018] Figure 5This utility model Figure 3 Enlarged 3D structural diagram at point B;

[0019] Figure 6 This is a partially cut-out three-dimensional structural diagram of the second limiting frame of this utility model.

[0020] In the diagram: 1. Double cone dryer; 2. Spring; 3. First sealing cover; 4. Second sealing cover; 5. Fixing rod; 6. First limiting ring; 7. Second limiting ring; 8. Fixing sleeve; 9. Connecting collar; 10. Scraper frame; 11. Rotating shaft; 12. Limiting tube; 13. First limiting frame; 14. Agitator fan; 15. First connecting rod; 16. Scraper plate; 17. Second connecting rod; 18. Limiting rod; 19. Spring; 20. Second limiting frame; 21. Connecting sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Example 1

[0025] Please see Figure 1-6This utility model provides an embodiment of a double cone dryer for the production of halogen-free flame retardants, comprising a double cone dryer 1. A first sealing cover 3 is fixedly connected to the top of the double cone dryer 1 by several screws. A second sealing cover 4 is threadedly connected to the bottom of the double cone dryer 1. Several fixing rods 5 are fixedly connected to the inner wall of the bottom of the double cone dryer 1. A first limiting ring 6 is fixedly connected to one end of each fixing rod 5. A second limiting ring 7 is rotatably connected to the middle of the first limiting ring 6. A fixing sleeve 8 is fixedly connected to the middle of the second limiting ring 7. A rotating shaft 11 is fixedly connected to the middle of the fixing sleeve 8. Connecting rings 9 are movably sleeved at both ends of the fixing sleeve 8. A scraper frame 10 is fixedly connected to the outer wall of the connecting ring 9. The scraper frame 10 fits against the inner wall of the double cone dryer 1. The upper end of the moving shaft 11 is movably sleeved with a limiting tube 12, which is fixedly connected to the first sealing cover 3. The outer wall of the fixed sleeve 8 is a regular polygon, and the inner walls of the connecting ring 9 and the second limiting ring 7 are both regular polygons adapted to the fixed sleeve 8. The second limiting ring 7 is a cross-shaped ring, and the first limiting ring 6 is an L-shaped ring. Both the second limiting ring 7 and the fixed sleeve 8 extend to the outside of the first limiting ring 6. The middle part of the second sealing cover 4 is movably sleeved with a second connecting rod 17. One end of the second connecting rod 17 located in the inner cavity of the double cone dryer 1 is fixedly connected to a connecting sleeve 21. The inner wall of the connecting sleeve 21 is a regular polygon and is movably sleeved with the fixed sleeve 8 extending to the outside of the first limiting ring 6. One end of the second connecting rod 17 extending to the outside of the second sealing cover 4 is movably engaged with a limiting rod. 18. A spring 19 is fixedly connected to one end of the limiting rod 18, and a second limiting frame 20 is fixedly connected to one end of the spring 19. The second limiting frame 20 is fixedly connected to the second sealing cover 4. The limiting rod 18 and the second limiting frame 20 are movably sleeved together. In use, a first sealing cover 3 is fixedly connected to the top of the double cone dryer 1 by several screws, and a second sealing cover 4 is threadedly connected to the bottom of the double cone dryer 1, so that the first sealing cover 3 and the second sealing cover 4 can seal the inside of the double cone dryer 1. Several fixing rods 5 are fixedly connected to the inner wall of the bottom of the double cone dryer 1. A first limiting ring 6 is fixedly connected to one end of the fixing rod 5. A second limiting ring 7 is rotatably connected to the middle of the first limiting ring 6. A fixing sleeve 8 is fixedly connected to the middle of the second limiting ring 7. A rotating shaft 11 is fixedly connected to the middle of the sleeve 8, allowing the double cone dryer 1 to fix the position of the first limiting ring 6 via the fixing rod 5. This, in turn, allows the first limiting ring 6 to restrict the rotational position of the fixed sleeve 8 and the rotating shaft 11 via the second limiting ring 7. Connecting rings 9 are movably sleeved at both ends of the fixed sleeve 8. A scraper frame 10 is fixedly connected to the outer wall of the connecting ring 9, and the scraper frame 10 fits against the inner wall of the double cone dryer 1. A limiting tube 12 is movably sleeved at the upper end of the rotating shaft 11, and the limiting tube 12 is fixedly connected to the first sealing cover 3. The outer wall of the fixed sleeve 8 is a regular polygon, and the inner walls of the connecting ring 9 and the second limiting ring 7 are both regular polygons adapted to the fixed sleeve 8, allowing the first sealing cover 3 to restrict the rotational position of the rotating shaft 11 via the limiting tube 12.To maintain the stability of the rotating shaft 11 and the fixed sleeve 8 during rotation, the fixed sleeve 8 rotates, causing the connecting sleeve 9 to rotate, which in turn causes the scraper frame 10 to rotate, scraping off the powder adhering to the inner wall of the double cone dryer 1. This facilitates the collection and cleaning of the powder on the inner wall of the double cone dryer 1, preventing the repeated drying of powdered ethylpropyl isobutyl hypophosphite, which would affect the performance of the powdered ethylpropyl isobutyl hypophosphite and also prevent the repeatedly dried powder from affecting the quality of the finished product. The second limiting ring 7 is a cross-shaped ring, and the first limiting ring 6 is an L-shaped ring, which allows the first limiting ring 6 to restrict the movement of the second limiting ring 7. Both the second limiting ring 7 and the fixing sleeve 8 extend to the outside of the first limiting ring 6, allowing the operator to open the first sealing cover 3 after a certain interval. Then, the fixing sleeve 8 and the rotating shaft 11 can be pulled out, causing the scraper frame 10 to lose its limiting position. The scraper frame 10 and the stirring fan 14 can then be removed from the upper end of the double cone dryer 1 and taken out of the inner cavity of the double cone dryer 1 for cleaning. This prevents powder from adhering to the outer walls of the scraper frame 10 and the stirring fan 14 after long-term operation, which would affect their use. Disassembly is simple and convenient, facilitating cleaning. A second connecting rod 17 is movably connected to the middle of the second sealing cover 4. A connecting sleeve 21 is fixedly connected to one end of the inner cavity of the double cone dryer 1. The inner wall of the connecting sleeve 21 is a regular polygon and is movably sleeved with the fixed sleeve 8 that extends to the outside of the first limiting ring 6. This allows the second connecting rod 17 to drive the connecting sleeve 21 to move and engage with the fixed sleeve 8. Then, rotating the second connecting rod 17 will drive the connecting sleeve 21 and the fixed sleeve 8 to rotate, causing the fixed sleeve 8 to drive the connecting ring 9 and the scraper frame 10 to rotate and scrape off the powder adhering to the inner wall of the double cone dryer 1. This is convenient to use. A limiting rod 18 is movably engaged at one end of the second connecting rod 17 that extends to the outside of the second sealing cover 4. One end of the limiting rod 18 is fixed. A spring 19 is connected, with one end of the spring 19 fixedly connected to a second limiting frame 20. The second limiting frame 20 is fixedly connected to the second sealing cover 4. A limiting rod 18 is movably sleeved with the second limiting frame 20, so that the second sealing cover 4 fixes the position of the second limiting frame 20. The second limiting frame 20 restricts the position of the limiting rod 18 through the spring 19, and the limiting rod 18 passes through the second limiting frame 20 and engages with the second connecting rod 17. The position of the limiting rod 18 after engaging with the second connecting rod 17 is restricted by the spring 19, making the engagement of the limiting rod 18 and the second connecting rod 17 stable and preventing loosening when the double cone dryer 1 rotates.

[0026] A double-cone dryer for the production of halogen-free flame retardants includes a double-cone dryer 1. A first sealing cover 3 is fixedly connected to the top of the double-cone dryer 1 by several screws. A second sealing cover 4 is threadedly connected to the bottom of the double-cone dryer 1. Several fixing rods 5 are fixedly connected to the inner wall of the bottom of the double-cone dryer 1. A first limiting ring 6 is fixedly connected to one end of each fixing rod 5. A second limiting ring 7 is rotatably connected to the middle of the first limiting ring 6. A fixing sleeve 8 is fixedly connected to the middle of the second limiting ring 7. A rotating shaft 11 is fixedly connected to the middle of the fixing sleeve 8. Connecting rings 9 are movably sleeved at both ends of the fixing sleeve 8. A scraper frame 10 is fixedly connected to the outer wall of the connecting ring 9. The scraper frame 10 fits against the inner wall of the double-cone dryer 1. A limiting tube 12 is movably sleeved at the upper end of the rotating shaft 11. The limiting tube 12 is fixedly connected to the first sealing cover 3. The outer wall of the fixing sleeve 8 is a regular polygon. The inner walls of the connecting ring 9 and the second limiting ring 7 are both regular polygons that fit the fixing sleeve 8. The second limiting ring 7 is a cross ring, and the first limiting ring 6 is an L-shaped ring. The second limiting ring 7 and the fixing sleeve 8 both extend to the outside of the first limiting ring 6. The middle of the second sealing cover 4 is movably sleeved with the second connecting rod 17. One end of the second connecting rod 17 located in the inner cavity of the double cone dryer 1 is fixedly connected to the connecting sleeve 21. The inner wall of the connecting sleeve 21 is a regular polygon and is movably sleeved with the fixing sleeve 8 that extends to the outside of the first limiting ring 6. One end of the second connecting rod 17 extending to the outside of the second sealing cover 4 is movably engaged with the limiting rod 18. One end of the limiting rod 18 is fixedly connected to a spring. 19. One end of spring 19 is fixedly connected to a second limiting frame 20. The second limiting frame 20 is fixedly connected to the second sealing cover 4. The limiting rod 18 is movably sleeved with the second limiting frame 20. In use, the top of the double cone dryer 1 is fixedly connected to the first sealing cover 3 by several screws, and the bottom end of the double cone dryer 1 is threadedly connected to the second sealing cover 4, so that the first sealing cover 3 and the second sealing cover 4 can cooperate to seal the inside of the double cone dryer 1. Several fixing rods 5 are fixedly connected to the inner wall of the bottom end of the double cone dryer 1. One end of the fixing rod 5 is fixedly connected to a first limiting ring 6. The middle of the first limiting ring 6 is rotatably connected to a second limiting ring 7. The middle of the second limiting ring 7 is fixedly connected to a fixing sleeve 8. The middle of the fixing sleeve 8 is fixedly connected to a rotating shaft 11, so that the double cone dryer 1... The cone dryer 1 uses a fixing rod 5 to fix the position of the first limiting ring 6, which in turn restricts the rotation of the fixing sleeve 8 and the rotating shaft 11 via the second limiting ring 7. Connecting rings 9 are movably fitted at both ends of the fixing sleeve 8, and a scraper frame 10 is fixedly connected to the outer wall of the connecting ring 9. The scraper frame 10 fits against the inner wall of the double cone dryer 1. A limiting tube 12 is movably fitted at the upper end of the rotating shaft 11, and the limiting tube 12 is fixedly connected to the first sealing cover 3. The outer wall of the fixing sleeve 8 is a regular polygon, and the inner walls of the connecting ring 9 and the second limiting ring 7 are both regular polygons adapted to the fixing sleeve 8. This allows the first sealing cover 3 to restrict the rotation of the rotating shaft 11 via the limiting tube 12, maintaining the stability of the rotating shaft 11 and the fixing sleeve 8 during rotation.When the fixed sleeve 8 rotates, it drives the connecting collar 9 to rotate, which in turn drives the scraper frame 10 to rotate, scraping off the powder adhering to the inner wall of the double cone dryer 1. This facilitates the collection and cleaning of the powder on the inner wall of the double cone dryer 1, preventing the repeated drying of powdered ethylpropyl isobutyl hypophosphite, which would affect the performance of the powdered ethylpropyl isobutyl hypophosphite and also prevent the repeatedly dried powder from affecting the quality of the finished product. The second limiting ring 7 is a cross-shaped ring, and the first limiting ring 6 is an L-shaped ring, which allows the first limiting ring 6 to restrict the movement of the second limiting ring 7. Both the second limiting ring 7 and the fixed sleeve 8... The first sealing cover 3 is extended to the outside of the first limiting ring 6, allowing the operator to open it after a certain time interval. Then, the fixing sleeve 8 and rotating shaft 11 are pulled out, causing the scraper frame 10 to lose its limiting position. The scraper frame 10 and stirring fan 14 can then be removed from the upper end of the double cone dryer 1 and cleaned to prevent powder buildup on their outer walls after prolonged use, which would affect their operation. Disassembly is simple and convenient, facilitating cleaning. A second connecting rod 17 is movably connected to the middle of the second sealing cover 4, and the second connecting rod 17 is located inside the double cone dryer 1. One end of the cavity is fixedly connected to a connecting sleeve 21. The inner wall of the connecting sleeve 21 is a regular polygon and is movably sleeved with a fixed sleeve 8 that extends to the outside of the first limiting ring 6. This allows the second connecting rod 17 to drive the connecting sleeve 21 to move and engage with the fixed sleeve 8. Then, rotating the second connecting rod 17 will drive the connecting sleeve 21 and the fixed sleeve 8 to rotate, causing the fixed sleeve 8 to drive the connecting ring 9 and the scraper frame 10 to rotate and scrape off the powder adhering to the inner wall of the double cone dryer 1. This is convenient to use. One end of the second connecting rod 17 extending to the outside of the second sealing cover 4 is movably engaged with a limiting rod 18. One end of the limiting rod 18 is fixedly connected to a spring. Spring 19 has a second limiting frame 20 fixedly connected to one end. The second limiting frame 20 is fixedly connected to the second sealing cover 4. A limiting rod 18 is movably sleeved with the second limiting frame 20, allowing the second sealing cover 4 to fix the position of the second limiting frame 20. The spring 19 restricts the position of the limiting rod 18, and the limiting rod 18 passes through the second limiting frame 20 and engages with the second connecting rod 17. The spring 19 further restricts the position of the limiting rod 18 after engagement with the second connecting rod 17, ensuring a stable engagement that will not loosen during the rotation of the double cone dryer 1.

[0027] Work steps

[0028] In this embodiment, during use: the double cone dryer 1 fixes the position of the first limiting ring 6 by the fixing rod 5, so that the first limiting ring 6 restricts the rotation position of the fixing sleeve 8 and the rotating shaft 11 by the second limiting ring 7, and the first sealing cover 3 restricts the rotation position of the rotating shaft 11 by the limiting tube 12, maintaining the stability of the rotating shaft 11 and the fixing sleeve 8 during rotation. When the fixing sleeve 8 rotates, it drives the connecting sleeve 9 to rotate, which in turn drives the scraper frame 10 to rotate, scraping off the powder adhering to the inner wall of the double cone dryer 1. This facilitates the collection and cleaning of the powder on the inner wall of the double cone dryer 1, avoiding repeated drying of powdered ethylpropyl isobutyl phosphite, which would affect the performance of the powdered ethylpropyl isobutyl phosphite, and also preventing the repeatedly dried powder from affecting the performance of the powder. To ensure the quality of the dried powder, after a certain time interval, the operator can open the first sealing cover 3, then pull out the fixed sleeve 8 and the rotating shaft 11, causing the scraper frame 10 to lose its limit. The scraper frame 10 and the stirring fan 14 can then be removed from the upper end of the double cone dryer 1 and taken out of the inner cavity of the double cone dryer 1. The scraper frame 10 and the stirring fan 14 can be cleaned to prevent powder from adhering to their outer walls after long-term operation, which would affect their use. Disassembly is simple and convenient, facilitating cleaning. The second connecting rod 17 can move the connecting sleeve 21 to engage with the fixed sleeve 8. Rotating the second connecting rod 17 will then rotate the connecting sleeve 21 and the fixed sleeve 8, causing the fixed sleeve 8 to rotate the connecting collar 9 and the scraper frame 10 to scrape off the powder. The powder adhering to the inner wall of the cone dryer 1 is easily removed. The position of the second limiting frame 20 is fixed by the second sealing cover 4, so that the position of the limiting rod 18 is restricted by the spring 19. The limiting rod 18 passes through the second limiting frame 20 and is engaged with the second connecting rod 17. The position of the limiting rod 18 and the second connecting rod 17 after being engaged is restricted by the spring 19, so that the engagement of the limiting rod 18 and the second connecting rod 17 is stable and will not loosen when the double cone dryer 1 rotates. The rotation position of the scraper plate 16 is restricted by the scraper frame 10, and the movement position of the scraper plate 16 is restricted by the spring 2. This makes the scraper plate 16 fit in close to the double cone dryer 1, so that the powder adhering to the inner wall of the double cone dryer 1 is effectively scraped off. When scraping away powder adhering to the inner wall of the double cone dryer 1, the scraper frame 10 is not blocked by the vacuum tube, and collisions between the scraper frame 10 and the vacuum tube are avoided, thus preventing damage to both. The service life of both is extended. When the fixed sleeve 8 rotates, it drives the first limiting frame 13 to rotate, so that the relative position of the two first limiting frames 13 is limited by the first connecting rod 15, thereby limiting the relative position of the two scraper frames 10. This ensures that the scraper frame 10 fits better against the inner wall of the double cone dryer 1 after being placed inside. The stirring fan 14 can rotate around the rotating shaft to stir the flame retardant and accelerate the drying process of the flame retardant. When the double cone dryer 1 rotates, it drives the stirring fan 14 to rotate, thus making the stirring fan 14 have a better stirring effect on the flame retardant.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double cone dryer for halogen-free flame retardant production, comprising a double cone dryer, characterized by, The top of the double cone dryer is fixedly connected to a first sealing cover by several screws, and the bottom of the double cone dryer is threadedly connected to a second sealing cover. Several fixing rods are fixedly connected to the inner wall of the bottom of the double cone dryer. A first limiting ring is fixedly connected to one end of each fixing rod. A second limiting ring is rotatably connected to the middle of the first limiting ring. A fixing sleeve is fixedly connected to the middle of the second limiting ring. A rotating shaft is fixedly connected to the middle of the fixing sleeve. Connecting rings are movably sleeved at both ends of the fixing sleeve. A scraper frame is fixedly connected to the outer wall of the connecting ring. The scraper frame fits against the inner wall of the double cone dryer. A limiting tube is movably sleeved at the upper end of the rotating shaft. The limiting tube is fixedly connected to the first sealing cover. The outer wall of the fixing sleeve is a regular polygon. The inner walls of the connecting ring and the second limiting ring are both regular polygons adapted to the fixing sleeve.

2. The double-cone dryer for halogen-free flame retardant production according to claim 1, characterized in that, A scraper plate is rotatably connected to the lower end of one end of the scraper frame, and a spring is fixedly connected to the lower end of the other end of the scraper frame. One end of the spring is fixedly connected to the upper end of the scraper plate. The lower end of the scraper plate is in contact with the scraper frame at the other end. One side of the scraper plate is in contact with the double cone dryer. Two first limiting frames are movably sleeved in the middle of the fixed sleeve. A first connecting rod is fixedly connected between the two first limiting frames. The two first limiting frames are respectively fixedly connected to the two scraper frames. The inner wall of the first limiting frame is a regular polygon.

3. The double-cone dryer for halogen-free flame retardant production according to claim 2, characterized in that, The first limiting frame includes a rotating shaft and a collar. The rotating shaft is fixedly connected to the collar, and the collar is fixedly connected to the first connecting rod and movably sleeved with the fixed sleeve. A stirring fan is rotatably connected to the middle of the rotating shaft, and the rotating shaft is relatively parallel to the transverse central axis of the double cone dryer.

4. The double-cone dryer for halogen-free flame retardant production according to claim 2, characterized in that, A vacuum exhaust pipe is fixedly connected to the middle of the double cone dryer, and the diameter of the vacuum exhaust pipe is smaller than the length of the scraper plate.

5. The double-cone dryer for halogen-free flame retardant production according to claim 1, characterized in that, The second limiting ring is a cross-shaped ring, and the first limiting ring is an L-shaped ring. Both the second limiting ring and the fixing sleeve extend to the outside of the first limiting ring.

6. The double-cone dryer for halogen-free flame retardant production according to claim 1, characterized in that, A second connecting rod is movably sleeved in the middle of the second sealing cover. A connecting sleeve is fixedly connected to one end of the second connecting rod located in the inner cavity of the double cone dryer. The inner wall of the connecting sleeve is a regular polygon and is movably sleeved with the fixed sleeve that extends to the outside of the first limiting ring. A limiting rod is movably engaged at one end of the second connecting rod extending to the outside of the second sealing cover. A spring is fixedly connected to one end of the limiting rod, and a second limiting frame is fixedly connected to one end of the spring. The second limiting frame is fixedly connected to the second sealing cover, and the limiting rod is movably sleeved with the second limiting frame.

7. The double-cone dryer for halogen-free flame retardant production according to claim 6, characterized in that, Both the limiting rod and the second connecting rod are T-shaped.

Images