Device and method for preventing slag bonding on surface of gypsum board drying transmission roller

Abstract

The invention relates to the technical field of drying, and discloses a device and method for preventing slag bonding on the surface of a gypsum board drying transmission roller, the device comprises a drying machine, the drying machine comprises a first drying area, a second drying area and a third drying area, and the second drying area is provided with a waste gas port used for discharging waste gas and hot air in the second drying area; and the front transmission rollers are arranged at the inlet end of the interior of the first drying area, the number of the front transmission rollers is multiple, and hot air channels are formed in the front transmission rollers. Waste gas hot air in the second drying area is introduced into the front transmission roller, the temperature of the front transmission roller is increased, and therefore after a wet plate makes contact with the front transmission roller with the hot air, moisture on the plate face is rapidly evaporated, end gypsum disintegrating slag cannot adhere to the surface of the roller, it is guaranteed that the surface of the front transmission roller is clean and smooth, and the service life of the front transmission roller is prolonged. Therefore, the problem that pits are formed on the surface of the gypsum board is solved, the appearance quality of products is improved, meanwhile, dry waste gas is recycled, and heat energy is saved.

Description

Technical Field

[0001] The invention relates to the technical field of drying, and in particular to a device and a method for preventing slagging on the surface of a gypsum board drying transmission roller. Background Art

[0002] During the production process, gypsum boards must be dried and dehydrated in drying equipment. The drying equipment includes a box-structured dryer and a transmission roller arranged inside the dryer. The transmission roller is driven to rotate by a driver. The wet gypsum board is placed on the rotating transmission roller and moves forward inside the dryer as the transmission roller rotates. The hot air inside the dryer dries and dehydrates the moving wet gypsum board, and the transmission roller plays a role of transmission and support.

[0003] In the prior art, the dryer includes a drying zone 1, a drying zone 2 and a drying zone 3 which are arranged in sequence. The hot air temperature inside the drying zone 2 is higher than the hot air temperature inside the drying zones 1 and 3. In particular, the temperature at the inlet end of the drying zone 1 is the lowest in the entire dryer. This is mainly because the inlet end of the drying zone 1 is the first part where the wet gypsum board enters the dryer for drying. If the temperature at the inlet end of the drying zone 1 is too high, the gypsum board is easily deformed and warped by rapid heat. Therefore, the hot air temperature at the inlet end of the drying zone 1 is relatively low.

[0004] In addition, when the wet gypsum board first enters the drying equipment, the board surface is very humid and the end is slightly stained with wet gypsum slurry debris, that is, the gypsum debris attached to the cut edge of the wet gypsum board, which causes small sticky particles to adhere to the surface of the transmission roller when the board surface contacts the surface of the transmission roller. Over time, the particles attached to the surface of the transmission roller aggregate to a large extent and are gradually dried and solidified by the hot air inside the dryer, causing the contact surface of the gypsum board and the transmission roller to be pitted by the particles on the surface of the transmission roller when the subsequent boards enter the drying equipment. Even if the board is dried later, the board surface where the board contacts the transmission roller still has pits, which affects the appearance quality of the board and affects the market sales. Summary of the invention

[0005] The object of the present invention is to provide a device and method for preventing slagging on the surface of a drying drive roller of a gypsum board, so as to solve the technical problem in the prior art that gypsum particles are easily adhered to the drying drive roller and the appearance quality of the gypsum board is affected.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] In a first aspect of the present invention, there is provided a device for preventing slagging on the surface of a gypsum board drying transmission roller, comprising:

[0008] A dryer, the dryer comprising a first drying zone, a second drying zone and a third drying zone, wherein the second drying zone is provided with an exhaust port for exhausting the exhaust hot air therein;

[0009] A front transmission roller is arranged at the entrance end of the first drying zone, the number of the front transmission rollers is set to be multiple, and a hot air channel is arranged inside the front transmission roller;

[0010] The connecting pipe is arranged at one side of the drying zone 1 and is used to convey hot air;

[0011] The external hot air discharge hole is arranged on the front driving roller and is used to discharge the hot air inside the hot air channel;

[0012] Among them, the exhaust port on the drying zone 2 is connected to the hot air channel on the front drive roller through a connecting pipe, and the hot air inside the hot air channel is directly discharged to the drying zone 1 through the external hot air exhaust hole to dry the gypsum board, thereby realizing the recycling of hot air.

[0013] Furthermore, one end of the front transmission roller close to the connecting pipe is connected to a first rotating shaft, and the other end of the front transmission roller is connected to a second rotating shaft. The outer surfaces of the first rotating shaft and the second rotating shaft are both connected to transmission bearings, and the transmission bearings are supported and fixed by a bracket.

[0014] Furthermore, the connecting pipe includes a main air duct connected to the exhaust port, the main air duct is connected to a plurality of branch air ducts, and each of the branch air ducts is connected to a plurality of subdivided pipes;

[0015] The first rotating shaft is a hollow shaft, one end of the first rotating shaft is connected to the hot air channel on the front driving roller, and the other end of the first rotating shaft is connected to the subdividing pipe through a rotating joint;

[0016] The hot air inside the dryer passes through the main air duct, the branch air duct and the subdivision duct in sequence to the rotary joint, and then reaches the hot air channel through the first rotating shaft to heat the front driving roller.

[0017] Furthermore, a regulating valve is provided inside the branch air duct to adjust the air intake volume of each branch air duct.

[0018] Furthermore, the second rotating shaft is a hollow shaft, and the external heat exhaust hole is arranged at an end of the front drive roller away from the connecting pipe. The external heat exhaust hole is connected to the hollow second rotating shaft, so that the hot air inside the front drive roller is discharged toward the drying area through the external heat exhaust hole and the second rotating shaft in sequence.

[0019] Furthermore, the external heat exhaust hole is arranged on the outer surface of the front transmission roller away from the end of the connecting pipe;

[0020] The number of the external heat exhaust holes is set to be multiple, and the multiple external heat exhaust holes are staggered on the outer surface of the front driving roller, so that the multiple external heat exhaust holes are not on the same shaft diameter or on the same horizontal axis.

[0021] Further, a first sleeve is provided inside the front drive roller, the first sleeve is sealed at one end away from the external hot air discharge hole, and the other end is open, a second sleeve is sleeved inside the first sleeve, the second sleeve is open at one end away from the external hot air discharge hole, and the other end is fixedly connected to the inner wall of the front drive roller, and a gap for hot air to pass through is left between the first sleeve and the second sleeve, so that a return channel for hot air flow is formed between the inner wall of the front drive roller and the first sleeve, between the first sleeve and the second sleeve, and inside the second sleeve;

[0022] The hot air entering the front drive roller first moves along the inner wall of the front drive roller to heat the inner wall of the front drive roller, and then moves back and forth through the return channel to the center of the front drive roller before being discharged.

[0023] Furthermore, the first sleeve and the second sleeve, and the first sleeve and the inner wall of the front driving roller are fixedly connected via a connecting rod, and the connecting rod supports and fixes the first sleeve and the second sleeve.

[0024] Furthermore, baffles are fixedly connected to both sides of the first sleeve, both sides of the second sleeve and the inner wall of the front driving roller, and the baffles are arranged obliquely along the hot air flow direction.

[0025] In a second aspect of the present invention, a method for preventing slagging on the surface of a gypsum board drying transmission roller is provided, wherein the method comprises the following steps:

[0026] The hot air in the second drying zone is transported to the front transmission roller through the connecting pipe;

[0027] The hot air inside the front drive roller heats the front drive roller, causing the temperature of the front drive roller to increase;

[0028] The hot air inside the front driving roller is discharged to the inside of the drying zone 1 through the external hot air discharge holes to realize hot air circulation;

[0029] When the wet gypsum board contacts the heated front drive roller, the moisture on the board surface is quickly evaporated and the gypsum debris at the end will not stick to the roller surface.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention passes the waste gas hot air from the second drying zone into the interior of the front driving roller to increase the temperature of the front driving roller. Therefore, after the wet board contacts the front driving roller with hot air, the moisture on the board surface is quickly evaporated, and the end gypsum debris will not stick to the roller surface. In this way, the cleanness and smoothness of the front driving roller surface are ensured, thereby solving the problem of pits on the gypsum board surface, improving the appearance quality of the product, and recycling the drying waste gas to save heat energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0033] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0034] Figure 2 It is a schematic diagram of the connection structure between the connection pipe and the front transmission roller of the present invention;

[0035] Figure 3 For the present invention Figure 2 Right view of;

[0036] Figure 4 It is a schematic diagram of the structure of the external heat exhaust hole in the first embodiment of the present invention;

[0037] Figure 5 It is a schematic diagram of the structure of the external heat exhaust hole in the second embodiment of the present invention;

[0038] Figure 6 It is a cross-sectional view of the front transmission roller of the present invention;

[0039] Figure 7 It is a schematic diagram of the connection structure between the front driving roller and the first sleeve of the present invention.

[0040] The numbers in the figure represent the following:

[0041] 1. Dryer; 2. Drying zone 1; 3. Drying zone 2; 4. Drying zone 3; 5. Exhaust port; 6. Front drive roller; 7. Hot air channel; 8. Connecting pipe; 9. External hot air discharge hole; 10. First rotating shaft; 11. Second rotating shaft; 12. Transmission bearing; 13. Bracket; 14. Main air duct; 15. Branch air duct; 16. Subdivision duct; 17. Rotary joint; 18. Regulating valve; 19. First casing; 20. Second casing; 21. Gap; 22. Return channel; 23. Baffle. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figure 1 and Figure 2 As shown, the present invention provides a device for preventing slagging on the surface of a gypsum board drying transmission roller, comprising:

[0044] A dryer 1, the dryer 1 comprising a first drying zone 2, a second drying zone 3 and a third drying zone 4, wherein the second drying zone 3 is provided with an exhaust port 5 for exhausting the exhaust hot air therein;

[0045] A front transmission roller 6 is arranged at the entrance end of the first drying zone 2, the number of the front transmission rollers 6 is set to be multiple, and a hot air channel 7 is arranged inside the front transmission roller 6;

[0046] A connecting pipe 8 is provided at one side of the drying zone 1 2 and is used for conveying hot air;

[0047] The external hot air discharge hole 9 is arranged on the front driving roller 6 and is used to discharge the hot air inside the hot air channel 7;

[0048] Among them, the exhaust port 5 on the drying zone 2 3 is connected to the hot air channel 7 on the front drive roller 6 through the connecting pipe 8, and the hot air inside the hot air channel 7 is directly discharged to the drying zone 1 2 through the external hot air discharge hole 9 to dry the gypsum board, thereby realizing the recycling of hot air.

[0049] In the prior art, the dryer 1 includes a drying zone 1 2, a drying zone 2 3 and a drying zone 3 4 which are arranged in sequence. The hot air temperature inside the drying zone 2 3 is higher than the hot air temperature inside the drying zone 1 2 and the drying zone 3 4. In particular, the temperature at the inlet end of the drying zone 1 2 is the lowest in the entire dryer 1. This is mainly because the inlet end of the drying zone 1 2 is the first part where the wet gypsum board enters the dryer 1 for drying. If the temperature at the inlet end of the drying zone 1 2 is too high, the gypsum board is easily deformed and warped by rapid heat. Therefore, the hot air temperature at the inlet end of the drying zone 1 2 is relatively low.

[0050] In addition, when the wet gypsum board just enters the drying equipment, the board surface is very humid and the end is slightly stained with wet gypsum slurry debris, that is, the gypsum debris attached to the cut edge of the wet gypsum board, which causes small sticky particles to adhere to the surface of the transmission roller when the board surface contacts the surface of the transmission roller. Over time, the particles attached to the surface of the transmission roller are aggregated to a large extent and are gradually dried and solidified by the hot air inside the dryer 1, causing the contact surface of the gypsum board and the transmission roller to be pitted with pits of varying sizes by the particles on the surface of the transmission roller when the subsequently produced board enters the drying equipment. Even if the board is dried later, there are still pits on the board surface where the board contacts the transmission roller, which affects the appearance quality of the board and the market sales.

[0051] Therefore, it is necessary to develop a device to prevent slagging on the surface of the gypsum board drying transmission roller.

[0052] In this embodiment, the waste gas hot air from the second drying zone 3 is passed into the front drive roller 6 to increase the temperature of the front drive roller 6. Therefore, after the wet board contacts the front drive roller 6 with hot air, the moisture on the board surface is quickly evaporated, and the end gypsum debris will not stick to the roller surface. This ensures that the surface of the front drive roller 6 is clean and smooth, thereby solving the problem of pits on the gypsum board surface, improving the product appearance quality, and recycling the drying waste gas to save heat energy.

[0053] In actual use, the hot air exhaust gas inside the second drying zone 3 is discharged from the exhaust port 5, and is guided by the hot air channel 7 so that the exhaust hot air reaches the inside of the front drive roller 6, and heats the front drive roller 6, thereby increasing the surface temperature of the front drive roller 6. When the wet plate contacts the front drive roller 6 with a higher temperature, the moisture on the plate surface is quickly evaporated, and the end gypsum debris will not stick to the roller surface.

[0054] The transmission roller not only has the function of transmission and support, but also has the function of preventing the gypsum board from falling off.

[0055] The front transmission roller 6 is connected to a first rotating shaft 10 at one end close to the connecting pipe 8, and is connected to a second rotating shaft 11 at the other end. Transmission bearings 12 are connected to the outer surfaces of the first rotating shaft 10 and the second rotating shaft 11, and the transmission bearings 12 are supported and fixed by brackets 13. The transmission bearings 12 support the front transmission roller 6 and facilitate the rotation of the front transmission roller 6. The front rotating roller is driven to rotate by an external driver.

[0056] The specific structure of the connecting pipe 8 is further described below. The connecting pipe 8 includes a main air pipe 14 connected to the exhaust port 5. The main air pipe 14 is connected to a plurality of branch air pipes 15. Each branch air pipe 15 is connected to a plurality of subdividing pipes 16.

[0057] The first rotating shaft 10 is a hollow shaft, one end of the first rotating shaft 10 is connected to the hot air channel 7 on the front driving roller 6, and the other end of the first rotating shaft 10 is connected to the subdividing pipe 16 through a rotating joint 17;

[0058] The hot air inside the dryer 1 passes through the main air duct 14 , the branch air duct 15 and the subdividing duct 16 in sequence to reach the rotary joint 17 , and then reaches the hot air channel 7 through the first rotating shaft 10 to heat the front driving roller 6 .

[0059] A regulating valve 18 is provided inside the branch air duct 15 for regulating the air intake volume of each branch air duct 15 .

[0060] The front drive roller 6 has multiple layers, and each layer has multiple front drive rollers 6 . The air volume is distributed through the branch air ducts 15 and the subdivision ducts 16 , and the air intake volume of each branch air duct 15 can be adjusted through the regulating valve 18 .

[0061] Regarding the specific placement of the external heat exhaust holes 9, this embodiment provides the following two specific examples.

[0062] In the first embodiment, the external heat exhaust hole 9 is arranged at the end of the front driving roller 6. Figure 4 As shown, specifically, the second rotating shaft 11 is a hollow shaft, the external hot air discharge hole 9 is arranged at one end of the front driving roller 6 away from the connecting pipe 8, and the external hot air discharge hole 9 is connected with the hollow second rotating shaft 11, so that the hot air inside the front driving roller 6 is discharged to the first drying area 2 through the external hot air discharge hole 9 and the second rotating shaft 11 in sequence. The hot air enters the interior of the front driving roller 6 through the connecting pipe 8, and then is directly discharged from the external hot air discharge hole 9 at the end of the front driving roller 6, so that the hot air inside the front driving roller 6 circulates in the front driving roller 6, thereby improving the heating effect on the front driving roller 6.

[0063] In the second embodiment, the external heat exhaust hole 9 is arranged on the outer surface of the end of the front driving roller 6, such as Figure 5 As shown, specifically,

[0064] The external heat exhaust hole 9 is arranged on the outer surface of the front driving roller 6 away from the end of the connecting pipe 8;

[0065] The number of the external heat exhaust holes 9 is set to be multiple, and the multiple external heat exhaust holes 9 are staggered on the outer surface of the front driving roller 6, so that the multiple external heat exhaust holes 9 are not on the same shaft diameter or on the same horizontal axis.

[0066] The external hot air discharge hole 9 is set on the outer surface of the front drive roller 6 away from the end of the connecting pipe 8, so that the hot air inside the front drive roller 6 can flow in each front drive roller 6, which can make the hot air adhere to the inner wall surface of the front drive roller 6 and be discharged, thereby improving the heating effect on the outer surface of the front drive roller 6. If the hot air is discharged from the end of the front drive roller 6, the hot air will flow preferentially in the middle of the front drive roller 6 inside the front drive roller 6, thereby reducing the heating effect on the inner wall surface of the front drive roller 6.

[0067] The special arrangement of the external hot air holes 9 on the outer surface of the front drive roller 6 and the uniform distribution of the external hot air holes 9 on the outer surface of the front drive roller 6 can make the hot air evenly distributed on the inner wall of the front drive roller 6 and heat the outer surface of the front drive roller 6 more evenly.

[0068] In addition, multiple external heat exhaust holes 9 are staggered on the outer surface of the front drive roller 6, so that the multiple external heat exhaust holes 9 are not arranged on the same axial diameter or on the same horizontal axis. This can prevent the front drive roller 6 from being twisted off by the torque during rotation, and the cross-openings change the stress on the surface of the roller steel.

[0069] In order to improve the heating effect of the hot air on the front driving roller 6, further, as Figure 7As shown, a first sleeve 19 is provided inside the front drive roller 6, and the first sleeve 19 is sealed at one end away from the external hot air discharge hole 9, and the other end is open, and a second sleeve 20 is sleeved inside the first sleeve 19, and the second sleeve 20 is open at one end away from the external hot air discharge hole 9, and the other end is fixedly connected to the inner wall of the front drive roller 6, and a gap 21 for hot air to pass through is reserved between the first sleeve 19 and the second sleeve 20, so that a return channel 22 for hot air flow is formed between the inner wall of the front drive roller 6 and the first sleeve 19, between the first sleeve 19 and the second sleeve 20, and inside the second sleeve 20;

[0070] The hot air entering the front drive roller 6 first moves along the inner wall of the front drive roller 6 to heat the inner wall of the front drive roller 6, and then returns back and forth through the return channel 22 and moves to the center of the front drive roller 6 in sequence before being discharged.

[0071] The first sleeve 19 and the second sleeve 20 , as well as the first sleeve 19 and the inner wall of the front driving roller 6 are fixedly connected via a connecting rod, and the connecting rod supports and fixes the first sleeve 19 and the second sleeve 20 .

[0072] By providing the first sleeve 19 and the second sleeve 20, a return channel 22 is formed inside the front driving roller 6, forcing the hot air to change its flow direction, thereby increasing its residence time in the front driving roller 6 and the mixing effect.

[0073] Baffles 23 are fixedly connected to both sides of the first sleeve 19, both sides of the second sleeve 20 and the inner wall of the front drive roller 6, and the baffles 23 are arranged obliquely along the hot air flow direction. By providing the baffles 23, the contact area between the hot air and the inner wall of the front drive roller 6 is increased, and eddy currents are generated, thereby extending the residence time of the hot air in the front drive roller 6.

[0074] The baffle 23 is arranged in a ring shape to improve the blocking effect and further improve the heating effect of the hot air on the front driving roller 6 .

[0075] In combination with the above-mentioned device for preventing slagging on the surface of a gypsum board drying transmission roller, a method for preventing slagging on the surface of a gypsum board drying transmission roller is provided, comprising the following steps:

[0076] The hot air in the second drying zone 3 is transported to the front transmission roller 6 through the connecting pipe 8;

[0077] The hot air inside the front drive roller 6 heats the front drive roller 6, causing the temperature of the front drive roller 6 to increase;

[0078] The hot air inside the front driving roller 6 is discharged to the inside of the first drying zone 2 through the external hot air discharge hole 9, thus realizing hot air circulation;

[0079] When the wet gypsum board contacts the front driving roller 6 whose temperature has risen, the moisture on the board surface is evaporated quickly, and the gypsum debris at the end will not stick to the roller surface.

[0080] The method provided by the present invention increases the temperature of the front drive roller 6 by passing the waste hot air from the second drying zone 3 into the interior of the front drive roller 6, so that after the wet board contacts the front drive roller 6 with hot air, the moisture on the board surface is quickly evaporated, and the end gypsum debris will not stick to the roller surface, thus ensuring the cleanness and smoothness of the surface of the front drive roller 6, thereby solving the problem of pits on the gypsum board surface, improving the product appearance quality, and at the same time recycling the dry waste gas to save heat energy.

[0081] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A device for preventing slagging on the surface of the transmission roller when drying gypsum board. It is characterized in that include: A dryer (1), the dryer (1) comprising a first drying zone (2), a second drying zone (3) and a third drying zone (4), wherein the second drying zone (3) is provided with an exhaust port (5) for exhausting the exhaust hot air therein; A front transmission roller (6) is arranged at the entrance end of the first drying zone (2), the number of the front transmission rollers (6) is set to be multiple, and a hot air channel (7) is arranged inside the front transmission roller (6); A connecting pipe (8) is arranged on one side of the drying zone (2) and is used to transport hot air; An external hot air discharge hole (9) is arranged on the front driving roller (6) and is used to discharge the hot air inside the hot air channel (7); The exhaust port (5) on the second drying zone (3) is connected to the hot air channel (7) on the front drive roller (6) through a connecting pipe (8), and the hot air inside the hot air channel (7) is directly discharged to the inside of the first drying zone (2) through an external hot air discharge hole (9) to dry the gypsum board, thereby realizing the recycling of hot air.

2. A device for preventing slagging on the surface of a gypsum board drying transmission roller according to claim 1, It is characterized in that One end of the front transmission roller (6) close to the connecting pipe (8) is connected to a first rotating shaft (10), and the other end of the front transmission roller (6) is connected to a second rotating shaft (11). The outer surfaces of the first rotating shaft (10) and the second rotating shaft (11) are both connected to transmission bearings (12), and the transmission bearings (12) are supported and fixed by a bracket (13).

3. A device for preventing slagging on the surface of a gypsum board drying transmission roller according to claim 2, It is characterized in that The connecting pipe (8) comprises a main air duct (14) connected to the exhaust port (5), the main air duct (14) is connected to a plurality of branch air ducts (15), and each of the branch air ducts (15) is connected to a plurality of subdivided pipes (16); The first rotating shaft (10) is a hollow shaft, one end of the first rotating shaft (10) is connected to the hot air channel (7) on the front driving roller (6), and the other end of the first rotating shaft (10) is connected to the subdividing pipe (16) via a rotating joint (17); The hot air inside the dryer (1) passes through the main air duct (14), the branch air duct (15) and the subdividing duct (16) in sequence to reach the rotary joint (17), and then reaches the hot air channel (7) through the first rotating shaft (10) to heat the front driving roller (6).

4. A device for preventing slagging on the surface of a gypsum board drying transmission roller according to claim 3, It is characterized in that A regulating valve (18) is provided inside the branch air duct (15) for regulating the air intake volume of each branch air duct (15).

5. A device for preventing slagging on the surface of a gypsum board drying transmission roller according to claim 4, It is characterized in that The second rotating shaft (11) is a hollow shaft, the external hot air discharge hole (9) is arranged at an end of the front driving roller (6) away from the connecting pipe (8), and the external hot air discharge hole (9) is connected to the hollow second rotating shaft (11), so that the hot air inside the front driving roller (6) is discharged to the first drying zone (2) through the external hot air discharge hole (9) and the second rotating shaft (11) in sequence.

6. A device for preventing slagging on the surface of a gypsum board drying transmission roller according to claim 4, It is characterized in that The external heat exhaust hole (9) is arranged on the outer surface of the front driving roller (6) at one end away from the connecting pipe (8); The number of the external heat exhaust holes (9) is set to be multiple, and the multiple external heat exhaust holes (9) are staggeredly arranged on the outer surface of the front drive roller (6), so that the multiple external heat exhaust holes (9) are not on the same shaft diameter or on the same horizontal axis.

7. A device for preventing slagging on the surface of a gypsum board drying transmission roller according to claim 5 or 6, It is characterized in that A first sleeve (19) is provided inside the front drive roller (6), one end of the first sleeve (19) away from the external hot air discharge hole (9) is sealed, and the other end thereof is open, a second sleeve (20) is sleeved inside the first sleeve (19), one end of the second sleeve (20) away from the external hot air discharge hole (9) is open, and the other end thereof is fixedly connected to the inner wall of the front drive roller (6), and a gap (21) for hot air to pass through is reserved between the first sleeve (19) and the second sleeve (20), so that a return channel (22) for hot air flow is formed between the inner wall of the front drive roller (6) and the first sleeve (19), between the first sleeve (19) and the second sleeve (20), and inside the second sleeve (20); The hot air entering the front drive roller (6) first moves along the inner wall of the front drive roller (6) to heat the inner wall of the front drive roller (6), then returns back and forth through the return channel (22) and moves to the center of the front drive roller (6) before being discharged.

8. A device for preventing slagging on the surface of a gypsum board drying transmission roller according to claim 7, It is characterized in that The first sleeve (19) and the second sleeve (20), and the first sleeve (19) and the inner wall of the front transmission roller (6) are fixedly connected via a connecting rod, and the connecting rod supports and fixes the first sleeve (19) and the second sleeve (20).

9. A device for preventing slagging on the surface of a gypsum board drying transmission roller according to claim 8, It is characterized in that Baffles (23) are fixedly connected to both sides of the first sleeve (19), both sides of the second sleeve (20) and the inner wall of the front drive roller (6), and the baffles (23) are arranged obliquely along the hot air flow direction.

10. A method for preventing slagging on the surface of a gypsum board drying transmission roller. It is characterized in that The device for preventing slagging on the surface of a gypsum board drying transmission roller according to any one of claims 1 to 9 comprises the following steps: The hot air in the second drying zone is transported to the front transmission roller through the connecting pipe; The hot air inside the front drive roller heats the front drive roller, causing the temperature of the front drive roller to increase; The hot air inside the front driving roller is discharged to the inside of the drying zone 1 through the external hot air discharge holes to realize hot air circulation; When the wet gypsum board contacts the heated front drive roller, the moisture on the board surface is quickly evaporated and the gypsum debris at the end will not stick to the roller surface.

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