Flame retardant drying device

Abstract

The present invention relates to the field of flame retardant drying technology, and in particular to a flame retardant drying device, which includes a drying barrel, an exhaust member, a hot air pipe and a rotating ring, and two sets of layer-changing mechanisms; the layer-changing mechanism includes a layer-changing block, a horizontally placed layering plate is fixedly connected to the layer-changing block, a plurality of discharge pipes are fixedly connected to the top surface of the layer-changing block, a discharge port is provided on the right side of the discharge pipe, a horizontal cavity located below the layering plate is provided on the left side of the layer-changing block, a vertical cavity is provided inside the layer-changing block and inside the discharge pipe, the bottom end of the vertical cavity is connected to the right end of the horizontal cavity, the top end of the vertical cavity is connected to the discharge port, a loading assembly for moving materials from the left side of the layer-changing block to the discharge port is provided in the layer-changing block, the top of the hot air pipe and the top of the vertical cavity are connected through a blowing pipe, and the blowing port of the blowing pipe faces the discharge port. The present invention can improve the fluidity of materials, avoid materials from staying in the same place as much as possible, improve drying efficiency and drying effect, and reduce the occurrence of caking.

Description

Technical Field

[0001] The invention relates to the technical field of flame retardant drying, in particular to a flame retardant drying device. Background Art

[0002] Magnesium hydroxide is an inorganic compound that decomposes at high temperatures, so it is widely used as a flame retardant in plastics, rubber products and other fields. Its flame retardant mechanism is that when the material is heated, magnesium hydroxide will decompose and absorb a large amount of heat, thereby effectively reducing the temperature of the material surface. In addition, the water vapor released during the decomposition process can reduce the combustion rate. The magnesium oxide generated by the decomposition of magnesium hydroxide is a high-melting-point solid that can form a protective film on the surface of the material to further prevent the spread of flames. In the preparation process of magnesium hydroxide, the drying step is crucial.

[0003] Referring to the Chinese patent document with authorization announcement number CN221076970U and announcement date June 4, 2024, entitled A drying device for the production of magnesium hydroxide flame retardant, the invention comprises a drying box, support legs and a discharge port. A drying device is arranged inside the drying box, and the drying device comprises a breaking up unit, a stirring unit and a drying unit. The breaking up unit is arranged on the left side of the top of the drying box, and the stirring unit is arranged inside the drying box. The drying unit comprises a supporting block and a hot air blower, and the hot air blower blows out hot air to dry the magnesium hydroxide flame retardant in the drying box.

[0004] Regarding the above-mentioned related content, although the stirring unit can stir the magnesium hydroxide in the drying box to a certain extent, its stirring effect is limited. As a result, the layer change of the upper and lower layers of magnesium hydroxide in the drying box is poor, the magnesium hydroxide in the lower layer is difficult to fully contact with the hot air, and moisture accumulates in the lower layer, affecting the drying effect and drying efficiency of the magnesium hydroxide in the lower layer. At the same time, the magnesium hydroxide in the upper layer is heated too much and there is a risk of premature decomposition. If a conventional stirring rod is used for stirring in the drying box, the stirring rod is prone to pile up at the contact position with the bottom wall inside the drying box, affecting the drying effect. Summary of the invention

[0005] In view of this, the present invention provides a flame retardant drying device, aiming to solve the technical problems of poor material fluidity, uneven drying and unsatisfactory drying effect in the prior art.

[0006] In order to solve the above technical problems, the flame retardant drying device provided by the present invention adopts the following technical solution: the flame retardant drying device comprises a drying barrel, an exhaust member for extracting the air inside the drying barrel, a hot air pipe and a rotating ring vertically penetrating the bottom of the drying barrel in a rotating connection manner and coaxially arranged, a driving member for driving the rotating ring to rotate, and two sets of layer changing mechanisms arranged symmetrically from the center;

[0007] The layer changing mechanism includes a layer changing block fixedly connected to the top surface of the rotating ring, the bottom surface of the layer changing block is connected to the bottom wall of the drying barrel, the top surface of the layer changing block is composed of an inclined surface inclined upward from left to right and a horizontal surface connected to the top of the inclined surface, the bottom end of the inclined surface is fixedly connected to a horizontally placed stratification plate, the left end of the stratification plate protrudes from the layer changing block, and a plurality of discharge pipes are fixedly connected to the horizontal surface, a discharge port is opened on the right side of the discharge pipe, and a horizontal cavity located below the stratification plate is opened on the left side of the layer changing block, and the side wall of the left bottom of the layer changing block is inclined to the right from bottom to top, a vertical cavity is opened inside the layer changing block and the discharge pipe, the bottom end of the vertical cavity is connected to the right end of the horizontal cavity, and the top of the vertical cavity is connected to the discharge port, and a loading component for moving materials from the left side of the layer changing block to the discharge port is provided in the layer changing block, the top of the hot air pipe and the top of the vertical cavity are connected through a blowing pipe, and the blowing port of the blowing pipe faces the discharge port.

[0008] By adopting the above technical solution, the layer-changing block rotates with the rotating ring, and the materials inside the drying barrel are separated by the layering plate, so that the materials on the upper layer move along the top of the layer-changing block and fall down when they move to the right side of the layer-changing block; the materials on the lower layer enter the horizontal cavity under the action of the feeding assembly, move upward to the top of the vertical cavity, and are blown out of the layer-changing block under the action of the blowing pipe.

[0009] There is a time difference in the movement of the upper and lower materials, which enables the layer exchange of the upper and lower materials, improves the uneven heating of the materials in the past, and avoids the agglomeration of the material surface as much as possible during the material movement. In the process of blowing the material with the air pipe, the drying efficiency and drying effect of the material can also be improved, and the continuous accumulation of materials in the drying barrel in the same place can be avoided as much as possible, thereby improving the fluidity of the materials in the drying barrel and the overall drying effect of the device.

[0010] Optionally, a plurality of triangular pyramid-shaped guide blocks are fixedly connected to the top surface of the layer-changing block, the cone tips of the guide blocks are located on the layering plate, and a plurality of guide blocks are provided and correspond one-to-one to the plurality of discharge pipes.

[0011] By adopting the above technical solution, a guiding effect is played on the materials, so that the materials can move smoothly through the top surface of the layer-changing block.

[0012] Optionally, the loading assembly includes a feed roller horizontally arranged in a horizontal cavity in a rotatable connection, and a rising auger vertically arranged in a vertical cavity in a rotatable connection, and a rotating part capable of driving the feed roller and the rising auger to rotate is provided in the drying barrel.

[0013] By adopting the above technical solution, the feed roller rotates to pull the material in the drying barrel into the horizontal cavity, and the ascending auger transports the material upward, reducing the situation where the material is squeezed during the movement, so that the material can be smoothly moved to the top of the vertical cavity. The material conveying process is continuous and uniform, which can improve the processing capacity and efficiency of the device.

[0014] Optionally, the feed roller includes two rotating disks respectively rotatably connected to the front and rear sides of the horizontal cavity, and a plurality of feed strips respectively connected to the two rotating disks at both ends. The plurality of feed strips are arranged circumferentially along the rotating disks, and the feed strip at the bottom is inclined to the right from top to bottom.

[0015] By adopting the above technical solution, multiple feed bars are arranged circumferentially on the rotating disk, which can reduce the situation where materials are stuck between adjacent feed bars and cannot fall, reduce material accumulation and blockage, and the feed bars are inclined to facilitate the movement of materials and help improve the fluidity of materials.

[0016] Optionally, the blade spacing of the ascending auger gradually narrows from bottom to top.

[0017] By adopting the above technical solution, it is helpful to control the rising situation of the material, control the amount of material moved to the blowing port of the blowing pipe, and enable the blowing pipe to blow the material stably.

[0018] Optionally, the hot air pipe is composed of a pipe 1 and a pipe 2 which are arranged in sequence from top to bottom and are connected, and the bottom of the pipe 1 is rotatably connected to the top of the pipe 2;

[0019] The rotating member includes a rotating motor arranged outside the drying barrel and a bevel gear 1 connected to the output end of the rotating motor, a bevel gear 2 is sleeved on the tube 2 and meshed with the bevel gear 1, a bevel gear 3 is sleeved on the tube 2 inside the drying barrel, a bevel gear 4 is axially horizontally arranged and meshed with the bevel gear 3, two bevel gears 4 are provided, and rotating rods are horizontally arranged inside the two layer changing blocks, the two rotating rods correspond to the two bevel gears 4 one-to-one, the end of the rotating rod is fixedly connected to the bevel gear 4, a plurality of bevel gears 5 corresponding to the rising augers one-to-one are sleeved on the rotating rod, a bevel gear 6 meshed with the bevel gear 5 is provided at the bottom of the shaft of the rising augers, and a belt transmission member is provided between the rotating disk and the rotating rod.

[0020] By adopting the above technical solution, as the rotating motor rotates, the feed roller and multiple ascending augers can be driven to rotate, which is conducive to stable and continuous control of the movement of materials.

[0021] Optionally, a diamond-shaped protective cover is provided between the two layer-changing blocks, the top of the protective plate is sealed, the bottom of the protective plate is rotatably connected to the bottom wall inside the drying barrel, and the hot air pipe, bevel gear three and bevel gear four are all located inside the protective plate.

[0022] By adopting the above technical solution, the material can be effectively prevented from moving into the protective cover, the normal operation of bevel gear three and bevel gear four can be ensured, the equipment failure rate can be reduced, the internal space of the drying barrel can be effectively utilized, and the structure can be reasonably laid out.

[0023] Optionally, the driving member includes a driving motor disposed outside the drying barrel, a first gear connected to a vertical output end of the driving motor, and a second gear sleeved on the bottom of the rotating ring and meshing with the first gear.

[0024] By adopting the above technical solution, as the driving motor rotates, the rotating ring can be driven to rotate, so that the two layer changing blocks can process the materials in the drying barrel, thereby realizing the smooth rotation of the rotating ring.

[0025] Optionally, the exhaust component includes an exhaust fan arranged on the top of the drying barrel, an exhaust pipe connected to the exhaust fan and extending into the interior of the drying barrel at one end, and a filter cover connected to the bottom wall of the box cover of the drying barrel and sleeved on the exhaust end of the exhaust pipe.

[0026] By adopting the above technical solution, the moisture generated during the drying process can be effectively discharged from the drying barrel to ensure the stability of the drying effect. The setting of the filter cover is conducive to avoiding the discharge of material particles carried by moisture as much as possible, reducing pollution and waste.

[0027] In summary, the present invention includes the following beneficial technical effects:

[0028] 1. The layer-changing block rotates with the rotating ring, and the materials inside the drying barrel are separated by the layering plate. The materials on the upper layer move along the top of the layer-changing block and fall down when they move to the right side of the layer-changing block; the materials on the lower layer enter the horizontal cavity under the action of the feeding assembly, and then move upward to the top of the vertical cavity, and are blown out of the layer-changing block under the action of the blowing pipe;

[0029] There is a time difference in the movement of the upper and lower materials, which enables the layer exchange of the upper and lower materials, improves the uneven heating of the materials in the past, and avoids the agglomeration of the material surface as much as possible during the movement of the materials. In the process of blowing the materials with the air pipe, the drying efficiency and drying effect of the materials can also be improved, and the continuous accumulation of materials in the drying barrel in the same place can be avoided as much as possible, which improves the fluidity of the materials in the drying barrel, improves the overall drying effect of the device, and can increase the contact area between the materials and the hot air, thereby improving the drying effect.

[0030] 2. The feed roller uses multiple feed strips arranged circumferentially on the rotating disk, which can reduce the situation where the material is stuck between adjacent feed strips and cannot fall, reduce the accumulation and blockage of the material, and the feed strips are set at an angle, which is conducive to the movement of the material and helps to improve the fluidity of the material.

[0031] 3. The change in the spacing between the ascending auger blades is conducive to controlling the rising of the material and the amount of material moved to the blowing port of the blowing pipe, so that the blowing pipe can blow the material stably.

[0032] 4. Set up a protective cover to effectively prevent materials from moving into the protective cover, ensure the normal operation of bevel gear three and bevel gear four, reduce equipment failure rate, effectively utilize the internal space of the drying barrel, and have a reasonable structural layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The overall structure of the embodiment of the present invention is shown in FIG. Figure 1 ;

[0034] Figure 2 The overall structure of the embodiment of the present invention is shown in FIG. Figure 2 ;

[0035] Figure 3 It is a structural schematic diagram of a layer changing block and auxiliary components in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of a layer changing block in an embodiment of the present invention;

[0037] Figure 5 It is a structural schematic diagram of a feeding assembly in an embodiment of the present invention;

[0038] Figure 6 for Figure 5 A partial enlarged schematic diagram of part A.

[0039] Description of the reference numerals: 1, drying barrel; 11, supporting legs; 12, box body; 13, box cover; 14, cylinder; 2, suction member; 21, suction machine; 22, suction pipe; 23, filter cover; 3, hot air pipe; 31, pipe 1; 32, pipe 2; 4, rotating ring; 5, driving member; 51, driving motor; 52, first gear; 53, second gear; 6, layer changing block; 61, horizontal cavity; 62, vertical cavity; 7, auxiliary component; 71, layering plate; 72, guide Toward block; 73, discharge pipe; 74, discharge port; 8, loading assembly; 81, feed roller; 811, rotating disk; 812, feed bar; 82, rising auger; 83, rotating part; 831, rotating motor; 832, bevel gear one; 833, bevel gear two; 834, bevel gear three; 835, bevel gear four; 836, rotating rod; 837, bevel gear five; 838, bevel gear six; 839, belt transmission part; 9, air blowing pipe; 10, protective cover. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0041] The following is combined with Figure 1 -Attached Figure 6 The present invention is described in further detail.

[0042] The embodiment of the present invention discloses a flame retardant drying device. Figures 1 to 6 The flame retardant drying device includes a drying mechanism, a rotating mechanism and a layer changing mechanism. The drying mechanism is used to dry the material. The layer changing mechanism is provided with two groups and the two groups are symmetrically arranged. The rotating mechanism is used to drive the two groups of layer changing mechanisms to rotate, so that the layer changing mechanisms can change the upper and lower layers of the material, improve the fluidity of the material, and improve the drying effect of the device.

[0043] Reference Figure 1 , Figure 2 and Figure 5 The drying mechanism includes a drying barrel 1, an exhaust member 2 for extracting the air inside the drying barrel 1, and a hot air pipe 3 vertically arranged at the bottom of the drying barrel 1 in a rotating connection. The material is placed in the drying barrel 1, and the hot air pipe 3 blows hot air into the drying barrel 1. The exhaust member 2 is used to extract moisture from the drying barrel 1 to ensure the stability of the drying effect. The hot air pipe 3 is coaxially arranged with the box body 12.

[0044] Reference Figure 1 The drying barrel 1 includes a box body 12 with supporting legs 11 at the bottom, a box cover 13 sealing the top of the box body 12, and a cylinder 14 arranged between the box body 12 and the box cover 13. The cylinder 14 is fixedly connected to the outer wall of the box body 12, and the output end of the cylinder 14 is connected to the side wall of the box cover 13. Starting the cylinder 14 is convenient for controlling the vertical position of the box cover 13 relative to the box body 12, and controlling the opening or sealing of the top opening of the box body 12, so as to facilitate the taking and placing of materials.

[0045] Reference Figure 2 The exhaust member 2 includes an exhaust fan 21 disposed on the top of the box cover 13, an exhaust pipe 22 connected to the exhaust fan 21 and extending into the interior of the drying barrel 1 at one end, and a filter cover 23 connected to the bottom wall of the box cover 13 and sleeved on the exhaust end of the exhaust pipe 22. The moisture generated during the drying process is effectively discharged from the drying barrel 1 to ensure the stability of the drying effect. The setting of the filter cover 23 is conducive to avoiding the discharge of material particles carried by moisture as much as possible, reducing pollution and reducing waste. In other embodiments, the exhaust fan 21, the exhaust block and the filter cover 23 can also be arranged on the box body 12 without conflicting with other structures. Furthermore, the exhaust fan 21 can also be replaced by a fan, a rotary vane pump, a jet pump, etc., and the filter cover 23 can also be replaced by a filter bag, a filter plate, etc.

[0046] Reference Figure 2 and Figure 3The rotating mechanism includes a rotating ring 4 which is vertically penetrated through the bottom of the drying barrel 1 and coaxially arranged with the hot air pipe 3 in a rotating connection manner, and a driving member 5 for driving the rotating ring 4 to rotate. The driving member 5 includes a driving motor 51 fixedly connected to the support leg 11, a first gear 52 connected to the vertical output end of the driving motor 51, and a second gear 53 which is sleeved on the bottom of the rotating ring 4 and meshed with the first gear 52. The driving motor 51 is started to drive the first gear 52 to rotate, and then the second gear 53 is driven to rotate, so that the rotating ring 4 can rotate axially around the box body 12, which is conducive to the stable operation of the device and the smooth rotation of the rotating ring 4. The use of the first gear 52 and the second gear 53 can make the structure reasonably laid out and avoid conflicts between structures as much as possible. In other embodiments, it can also be combined with the driving motor 51 by means of a belt, a pulley, or a chain.

[0047] Reference Figure 3 , Figure 4 and Figure 5 The layer-changing mechanism includes a layer-changing block 6, an auxiliary component 7, a feeding component 8, an air blowing pipe 9 and a protective plate for forming a protective cover 10. The layer-changing block 6 is used to divide the material in the box 12 into two layers, the upper and lower layers of the material are transported separately, and after transportation, they are successively dropped, so as to realize the layer-changing of the upper and lower layers of the material. The auxiliary component 7 is used to assist the stratification of the material in the box 12. The feeding component 8 is used to move the lower layer of the material inside the layer-changing block 6 to the top of the layer-changing block 6. The air blowing pipe 9 is used to lift the lower layer of the material moved to the top. The two protective plates of the two sets of layer-changing mechanisms cooperate to form a protective cover 10. The protective cover 10 is used to prevent the material from hindering the normal operation of the structure. The layer-changing of the upper and lower layers of the material is realized, and the uneven heating of the material in the past is improved. In the process of moving the material, the caking of the material surface can be avoided as much as possible. In the process of blowing the material by the air blowing pipe 9, the drying efficiency and drying effect of the material can also be improved, and the continuous accumulation of the material in the drying barrel 1 in the same place can be reduced, the fluidity of the material in the drying barrel 1 is improved, and the overall drying effect of the device is improved.

[0048] Reference Figure 3 and Figure 4 The layer changing block 6 extends radially along the box body 12. The top surface of the layer changing block 6 is composed of an inclined surface that tilts upward from left to right and a horizontal surface connected to the top of the inclined surface. The bottom surface of the layer changing block 6 is connected to the bottom wall of the drying barrel 1. Figure 3 and Figure 4The auxiliary component 7 includes a layering plate 71 fixedly connected to the bottom end of the inclined surface and placed horizontally, a plurality of guide blocks 72 arranged in the radial direction of the box body 12, a plurality of discharge pipes 73 corresponding to the guide blocks 72 one by one and fixedly connected to the horizontal surface of the layer-changing block 6, and a discharge port 74 opened on the right side of the discharge pipe 73. The layering plate 71 is used to divide the material in the box body 12 into upper and lower layers, so that the upper and lower layers of materials can move along different paths first, and then the material originally located in the upper layer moves to the lower layer, and the material originally located in the lower layer moves to the upper layer, so as to complete the layer change of the upper and lower layers of materials. The guide block 72 is in the shape of a triangular pyramid as a whole. The guide block 72 is fixedly connected to the top surface of the layering plate 71 and the inclined surface of the layer-changing block 6, and the cone tip of the guide block 72 is located on the layering plate 71. In order to facilitate the description of the structural connection relationship and characteristics, the "left", "right", "upper" and "lower" described in the text are as follows: Figure 4 As reference, perpendicular to Figure 4 The direction of the paper is defined as the front-to-back direction.

[0049] Reference Figure 3 and Figure 4 A horizontal cavity 61 is provided in the layer changing block 6, which is located below the stratification plate 71 and connected to the left side of the layer changing block 6. A vertical cavity 62 is provided inside the layer changing block 6 and the discharge pipe 73, which extends vertically and is connected to the right end of the horizontal cavity 61. The discharge port 74 on the right side of the discharge pipe 73 is connected to the top of the vertical cavity 62.

[0050] The guide block 72 guides the material above the layering plate 71 to make it flow, thereby reducing the impact of material disturbance and accumulation on the transportation efficiency of the upper material. The discharge port 74 serves as the outlet of the material below the layering plate 71, increases the final rising height of the lower material, and expands the time difference between the movement of the upper and lower materials, which is beneficial to improving the fluidity of the material, and can avoid as much as possible that the material in the box 12 submerges the outlet of the lower material, and reduce the obstacle of the height of the layer changing block 6 to the movement of the upper material.

[0051] Reference Figure 4 , Figure 5 and Figure 6 The feeding assembly 8 includes a feed roller 81 horizontally arranged in the horizontal cavity 61 in a rotationally connected manner, and an ascending auger 82 vertically arranged in the vertical cavity 62 in a rotationally connected manner. A rotating member 83 capable of driving the feed roller 81 and the ascending auger 82 to rotate is provided in the drying barrel 1. The feed roller 81 rotates to pull the material in the drying barrel 1 into the horizontal cavity 61, and the ascending auger 82 transports the material upward, reducing the situation where the material is squeezed during the movement, so that the material can be smoothly moved to the top of the vertical cavity 62, and the material transportation process is continuous and uniform, which can improve the processing capacity and processing efficiency of the device.

[0052] Reference Figure 4 and Figure 5The feed roller 81 includes two rotating disks 811 respectively connected to the front and rear sides of the horizontal cavity 61, and multiple feed strips 812 connected to the two rotating disks 811 at both ends. The multiple feed strips 812 are arranged circumferentially along the rotating disk 811, and the feed strips 812 at the bottom are tilted to the right from top to bottom. The use of multiple feed strips 812 arranged circumferentially on the rotating disk 811 can reduce the situation where the material is stuck between adjacent feed strips 812 and cannot fall, and reduce the accumulation and blockage of the material. The feed strips 812 are tilted, which is conducive to the movement of the material and helps to improve the fluidity of the material.

[0053] Reference Figure 4 The blade spacing of the ascending auger 82 gradually narrows from bottom to top, which is beneficial to control the rising of the material, control the amount of the material moved to the blowing port of the blowing pipe 9, and enable the blowing pipe 9 to stably blow the material.

[0054] Reference Figure 5 and Figure 6 The hot air pipe 3 is composed of a pipe 1 31 and a pipe 2 32 which are arranged in sequence from top to bottom and are connected. The bottom of the pipe 1 31 is rotatably connected to the top of the pipe 2 32. The rotating member 83 includes a rotating motor 831, a bevel gear 1 832, a bevel gear 2 833, a bevel gear 3 834, two bevel gear 4s 835, two rotating rods 836, a plurality of bevel gears 5 837, a plurality of bevel gears 6 838, and a belt transmission member 839. The rotating motor 831 is arranged outside the drying barrel 1, and the rotating motor 831 is connected to the support leg 11 of the drying barrel 1. The bevel gear 1 832 is fixedly connected to the output end of the rotating motor 831. The bevel gear 2 833 is sleeved on the pipe 2 32, and the bevel gear 2 833 is meshed with the bevel gear 1 832. The bevel gear 3 834 is arranged inside the drying barrel 1, and the bevel gear 3 834 is sleeved on the pipe 2 32. The two bevel gears 4 835 are both axially arranged horizontally and are meshed with the bevel gear 3 834. The two rotating rods 836 correspond to the two layer changing blocks 6 one by one. The rotating rods 836 are water-cooled. It is arranged horizontally inside the layer-changing block 6, and the two rotating rods 836 correspond one-to-one to the two bevel gears four 835. The end of the rotating rod 836 is fixedly connected to the bevel gear four 835. Multiple bevel gears five 837 are respectively sleeved on the rotating rod 836, and the multiple bevel gears five 837 correspond one-to-one to the multiple rising augers 82. Multiple bevel gears six 838 are connected to the bottom of the shaft of the rising augers 82 in sequence, and the multiple bevel gears six 838 correspond one-to-one to the multiple bevel gears five 837 and mesh with each other. The belt transmission member 839 is arranged between the rotating disk 811 and the rotating rod 836.

[0055] The hot air pipe 3 is divided into pipe 1 31 and pipe 2 32, so that pipe 1 31 can be used as a structure to introduce hot air into the blowing pipe 9, and pipe 2 32 can transmit rotation to the rotating rod 836, avoiding conflicts between the structures and preventing normal rotation, so that the rotation of the rotating ring 4 and the rotation of the rotating rod 836 do not conflict with each other.

[0056] Start the rotating motor 831, and the rotation is transmitted in sequence between the bevel gear 1 832, the bevel gear 2 833, the bevel gear 3 834, and the bevel gear 4 835, and drives the rotating rod 836 to rotate. With the rotation of the rotating rod 836, multiple bevel gears 5 837, bevel gear 6 838 and multiple ascending augers 82 are driven to rotate, and the rotating disk 811 is driven to rotate through the belt transmission member 839, thereby realizing the control of multiple ascending augers 82 and rotating rollers to rotate, and can simultaneously drive the ascending augers 82 and rotating rollers in two sets of layer-changing mechanisms to rotate. In other embodiments, the rotating rod 836 and the feed roller 81 can also be directly driven to rotate by the rotating motor 831, belt transmission or chain transmission. Compared with other embodiments, the advantage of using bevel gear transmission is that it is easy to repair and convenient for reasonable structural layout.

[0057] Reference Figure 3 and Figure 5 One end of the blowing pipe 9 is connected to the top of the pipe 1 31, and the other end of the blowing pipe 9 is connected to the side walls of multiple discharge pipes 73. The blowing port of the blowing pipe 9 faces the discharge port 74, and the material on the rising auger 82 in the discharge pipe 73 is blown into the box body 12 along the discharge port 74.

[0058] Reference Figure 3 and Figure 5 The protective plate is fixedly connected to the side wall of the layer-changing block 6, and the two protective plates cooperate to form a diamond-shaped protective cover 10. The end of the air blowing pipe 9 extends through the protective cover 10. The top of the protective cover 10 is sealed, and the bottom of the protective cover 10 is rotatably connected to the bottom wall inside the box 12. The protective cover 10 can cover the bevel gear three 834, the bevel gear four 835 and the hot air pipe 3 to reduce the influence of the material in the box 12 on the bevel gear transmission.

[0059] The implementation principle of the flame retardant drying device of the embodiment of the present invention is:

[0060] The height of the material in the drying barrel 1 is higher than the layering plate 71 and lower than the top surface of the layer changing block 6 .

[0061] Start the cylinder 14 to drive the box cover 13 to move upward, open the top of the box body 12, add materials into the box body 12, transport hot air into the box body 12 through the hot air pipe 3, start the exhaust fan 21, and the moisture is filtered by the filter cover 23 and then extracted along the exhaust pipe 22.

[0062] The driving motor 51 is started to drive the first gear 52 and the second gear 53 to rotate in sequence, thereby causing the rotating ring 4 to rotate smoothly around the axial direction of the box body 12 .

[0063] During the rotation of the rotating ring 4, the two layer-changing blocks 6 are driven to rotate around the box body 12, and the air blowing pipe 9 and the pipe 1 31 rotate along with the layer-changing blocks 6.

[0064] The rotating motor 831 is started to drive the tube 31 to rotate, thereby rotating the rotating rod 836 and the feed roller 81. During the rotation of the rotating rod 836, the multiple ascending augers 82 rotate to make the material in the layer changing block 6 move in a directional manner.

[0065] The material below the stratification plate 71 moves along the horizontal cavity 61 and the vertical cavity 62 to the top of the discharge pipe 73 and is blown by the air blowing pipe 9. The material above the stratification plate 71 passes through the top of the layer changing block 6 and moves to the right side of the layer changing block 6 under the guidance of the guide block 72, thereby completing the layer change of the upper and lower layers of materials.

[0066] The uneven heating of materials in the past is improved, and in the process of material movement, the agglomeration of materials on the surface can be avoided as much as possible. The feed roller 81 and the rising auger 82 can also reduce the agglomeration inside the materials. In the process of blowing materials by the air pipe 9, the drying efficiency and drying effect of the materials can also be improved, and the continuous accumulation of materials in the drying barrel 1 in the same place can be avoided as much as possible, the fluidity of the materials in the drying barrel 1 is improved, and the overall drying effect of the device is improved.

[0067] Furthermore, after the magnesium hydroxide is dried, it can be added to other materials in a certain proportion according to specific needs to prepare the desired products. For PVC soft products, the recommended amount of magnesium hydroxide added is 15 to 25 parts by mass, based on every 100 parts by mass of PVC resin; for PVC hard products, the recommended amount of magnesium hydroxide added is 3 to 5 parts by mass, based on every 100 parts by mass of PVC resin. For some products with lower requirements for flame retardant properties, such as food packaging materials, daily plastic products, electronic product components, etc., you can choose to add 800-1000 mg of magnesium hydroxide per kilogram of finished product to provide basic flame retardant protection, ensure product safety and compliance with safety standards, and improve material performance.

[0068] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A flame retardant drying device, comprising a drying barrel, an exhaust member for extracting air from the drying barrel, a hot air pipe and a rotating ring vertically and coaxially arranged through the bottom of the drying barrel in a rotating connection, and a driving member for driving the rotating ring to rotate, characterized in that: Also includes: Two sets of layer-changing mechanisms arranged symmetrically in the center; The layer changing mechanism includes a layer changing block fixedly connected to the top surface of the rotating ring, the bottom surface of the layer changing block is connected to the bottom wall of the drying barrel, the top surface of the layer changing block is composed of an inclined surface inclined upward from left to right and a horizontal surface connected to the top of the inclined surface, the bottom end of the inclined surface is fixedly connected to a horizontally placed stratification plate, the left end of the stratification plate protrudes from the layer changing block, and a plurality of discharge pipes are fixedly connected to the horizontal surface, a discharge port is opened on the right side of the discharge pipe, and a horizontal cavity located below the stratification plate is opened on the left side of the layer changing block, and the side wall of the left bottom of the layer changing block is inclined to the right from bottom to top, a vertical cavity is opened inside the layer changing block and the discharge pipe, the bottom end of the vertical cavity is connected to the right end of the horizontal cavity, and the top of the vertical cavity is connected to the discharge port, and a loading component for moving materials from the left side of the layer changing block to the discharge port is provided in the layer changing block, the top of the hot air pipe and the top of the vertical cavity are connected through a blowing pipe, and the blowing port of the blowing pipe faces the discharge port.

2. The flame retardant drying device according to claim 1, characterized in that: A plurality of triangular pyramid-shaped guide blocks are fixedly connected to the top surface of the layer-changing block, the cone tips of the guide blocks are located on the layering plate, and a plurality of guide blocks are provided and correspond one to one with the plurality of discharge pipes.

3. The flame retardant drying device according to claim 1, characterized in that: The feeding assembly includes a feed roller horizontally arranged in a horizontal cavity in a rotatable connection, and an ascending auger vertically arranged in a vertical cavity in a rotatable connection. A rotating part capable of driving the feed roller and the ascending auger to rotate is provided in the drying barrel.

4. The flame retardant drying device according to claim 3, characterized in that: The feed roller includes two rotating disks respectively connected to the front and rear sides of the horizontal cavity, and a plurality of feed strips respectively connected to the two rotating disks at both ends. The plurality of feed strips are arranged circumferentially along the rotating disk, and the feed strip at the bottom is tilted to the right from top to bottom.

5. The flame retardant drying device according to claim 3, characterized in that: The blade spacing of the ascending auger gradually narrows from bottom to top.

6. The flame retardant drying device according to claim 4, characterized in that: The hot air pipe is composed of a pipe 1 and a pipe 2 which are arranged in sequence from top to bottom and are connected, and the bottom of the pipe 1 is rotatably connected to the top of the pipe 2; The rotating member includes a rotating motor arranged outside the drying barrel and a bevel gear 1 connected to the output end of the rotating motor, a bevel gear 2 is sleeved on the tube 2 and meshed with the bevel gear 1, a bevel gear 3 is sleeved on the tube 2 inside the drying barrel, a bevel gear 4 is axially horizontally arranged and meshed with the bevel gear 3, two bevel gears 4 are provided, and rotating rods are horizontally arranged inside the two layer changing blocks, the two rotating rods correspond to the two bevel gears 4 one-to-one, the end of the rotating rod is fixedly connected to the bevel gear 4, a plurality of bevel gears 5 corresponding to the rising augers one-to-one are sleeved on the rotating rod, a bevel gear 6 meshed with the bevel gear 5 is provided at the bottom of the shaft of the rising augers, and a belt transmission member is provided between the rotating disk and the rotating rod.

7. The flame retardant drying device according to claim 6, characterized in that: A diamond-shaped protective cover is arranged between the two layer-changing blocks. The top of the protective plate is sealed, and the bottom of the protective plate is rotatably connected to the bottom wall inside the drying barrel. The hot air pipe, bevel gear three and bevel gear four are all located inside the protective plate.

8. The flame retardant drying device according to claim 1, characterized in that: The driving member comprises a driving motor arranged outside the drying barrel, a first gear connected to the vertical output end of the driving motor, and a second gear sleeved on the bottom of the rotating ring and meshing with the first gear.

9. The flame retardant drying device according to claim 3, characterized in that: The air extraction member comprises an air extractor arranged on the top of the drying barrel, an air extraction pipe connected to the air extractor and extending into the drying barrel at one end, and a filter cover connected to the bottom wall of the box cover of the drying barrel and sleeved on the air extraction end of the air extraction pipe.

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