A drum dryer

Abstract

The present invention belongs to the technical field of drying devices, and specifically is a drum dryer, comprising a drum; a fixed frame is laid on the bottom of the drum; two placement plates are fixedly installed on one side of the fixed frame; a first mounting platform is provided on the placement platform; a pneumatic telescopic rod is fixedly installed on the first mounting platform; the telescopic rod of the pneumatic telescopic rod is divided into three-level telescopic rods, namely a first telescopic rod, a second telescopic rod and a third telescopic rod; the first telescopic rod, the second telescopic rod and the third telescopic rod are all provided with a material blocking component at one end away from the first mounting platform; a second mounting platform is fixedly installed on the side of the fixed frame close to the discharge port; an exhaust fan is fixedly installed on the end of the second mounting platform away from the fixed frame; the invention mainly solves the problem that the drum rotation speed needs to be reduced for materials with high humidity, so that the materials accumulate in the drum, resulting in incomplete drying of the materials.

Description

Technical Field

[0001] The invention belongs to the technical field of drying devices, in particular to a drum type drying machine. Background Art

[0002] In modern grain, food, chemical, pharmaceutical, agricultural and sideline products, fodder, industrial raw materials and other processing and production fields, it is usually necessary to dry the raw materials for the next processing and production. The most commonly used equipment is the drum dryer.

[0003] Drum dryers primarily utilize a slightly tilted, rotating cylinder. Wet material enters from one end, and a scooping plate within the cylinder continuously scoops and drops the material as it rotates, allowing it to fully contact the hot air entering from the feed or discharge end, improving drying efficiency and moving the material forward. Finally, the dry material is collected from the other end. Drum dryers offer high processing capacity, low fuel consumption, and low drying costs. They are also heat-resistant, highly scalable, and feature stable cylinder operation and high reliability.

[0004] However, in daily work, we find that for materials with high humidity, the drum dryer needs to reduce the speed of the drum and increase the retention time of the material in the drum, thereby increasing the drying time and ensuring that the material is completely dried.

[0005] However, after reducing the drum speed, the speed of the lifting plate will also decrease, and the amplitude of the lifting plate's stirring of the material will be reduced, so that the material cannot fully contact the inner wall of the drum, thereby reducing the stirring effect of the lifting plate on the material. Moreover, due to the reduction in the speed of the lifting plate, the transportation efficiency of the material in the drum will also be reduced, which may easily lead to the accumulation of material in the drum, resulting in incomplete drying of the material. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a drum dryer.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a drum dryer described in the present invention comprises a drum; a fixed frame is laid on the bottom of the drum; a gear ring is provided on the outer ring of the drum, and the gear ring is fixedly connected to the drum through a supporting column; two fixing rings are provided on the outer ring of the drum, and each fixing ring is fixedly connected to the drum through a supporting column; a plurality of groups of copying plates are fixedly installed on the inner ring of the drum, and each group of copying plates is evenly arranged along the circumferential direction of the drum; the copying plates have a certain angle with the circumferential direction of the drum; a first servo motor is fixedly installed on both sides of the drum on the fixed frame; driving gears are fixedly installed on the output ends of the two first servo motors, and the driving gears are meshed with the gear ring; supporting wheels are installed on both sides of the drum and at positions corresponding to the fixing rings on the fixed frame; the supporting wheels are rotatably connected to the fixed frame and support the drum; a feed port is provided at one end of the drum; a discharge port is provided at the other end of the drum;

[0008] Two symmetrically arranged placing plates are fixedly installed on one side of the fixing frame near the feed port; a first mounting platform is provided on the placing plate; a pneumatic telescopic rod is fixedly installed on the first mounting platform, and the pneumatic telescopic rod is parallel to the fixing frame; the output end of the pneumatic telescopic rod extends into the drum; the telescopic rod of the pneumatic telescopic rod is divided into three-level telescopic rods, namely a first telescopic rod, a second telescopic rod and a third telescopic rod; one end of the first telescopic rod, the second telescopic rod and the third telescopic rod are all provided with a material blocking component; the material blocking component includes a main material blocking bag and an auxiliary material-stopping bag; one of the auxiliary material-stopping bags is connected to an external air pump through a hose; the outer rings of the first telescopic rod, the second telescopic rod and the third telescopic rod are all fixedly connected with auxiliary material-stopping bags; each of the auxiliary material-stopping bags is provided with an evenly arranged air guide tube; the other end of the air guide tube on each of the auxiliary material-stopping bags is commonly fixedly connected to a main material-stopping bag, and the main material-stopping bag and the auxiliary material-stopping bag are connected through the air guide tube; each of the two adjacent auxiliary material-stopping bags is fixedly installed with an evenly arranged connecting tube, and each of the two adjacent auxiliary material-stopping bags is connected through the connecting tube.

[0009] Preferably, the connecting pipe is a telescopic hose.

[0010] Preferably, the cross-sections of the main material-stopping bag and the auxiliary material-stopping bag are arch-shaped.

[0011] Preferably, the main material-blocking bag and the auxiliary material-blocking bag are made of fluororubber.

[0012] Preferably, the placement plates are each provided with a slide groove; two symmetrically arranged sliding blocks are fixedly mounted on the bottom of the first mounting platform; and the two sliding blocks slide in adjacent slide grooves.

[0013] Preferably, evenly arranged air leakage holes are provided on the opposite surfaces of two adjacent main material-blocking bags, and filter cloths are fixedly mounted on the air leakage holes.

[0014] Preferably, a second mounting platform is fixedly mounted on one side of the fixing frame close to the discharge port; and an exhaust fan is fixedly mounted on one end of the second mounting platform away from the fixing frame.

[0015] Preferably, the air guide tube is a corrugated tube.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. A drum dryer according to the present invention, since part of the material collides with the baffle member filled with high-temperature dry gas under the turning of the copying plate, the temperature of the baffle member can be transferred to the material, thereby enhancing the drying effect of the material. At the same time, a relatively closed space is formed between the inflated baffle member and the drum, so that the temperature in this space is more concentrated. When the material passes through this space, a better drying effect is obtained under the turning of the copying plate. At the same time, by controlling the elongation or shortening of the pneumatic telescopic rod in the drum, the distance between the baffle members is controlled to increase or decrease, thereby controlling the increase or decrease of this relatively closed space, so that the material with high humidity can still obtain the best drying effect without reducing the drum speed. This avoids the situation that when the drum speed is low, the speed of the copying plate is reduced, the turning amplitude of the material by the copying plate is reduced, the material is not fully contacted with the inner wall of the drum, resulting in a reduced stirring effect of the copying plate on the material, and also avoids the situation that the transmission speed of the material in the drum is reduced due to the reduction of the copying plate speed, the material is accumulated in the drum, and the material is not completely dried.

[0018] 2. The drum dryer described in the present invention has a first mounting platform fixedly connected to the slider and can slide along the slide groove on the placement plate. Therefore, when the rolling dryer dries materials with very low humidity and the materials can be dried only by relying on the heated drum, the staff can push the first mounting platform to slide along the slide groove on the placement plate on the placement plate in the direction away from the drum by adjusting the pneumatic telescopic rod to the initial state, thereby completely withdrawing the pneumatic telescopic rod from the drum. At this time, the drum becomes an ordinary drum dryer, thereby meeting the needs of drying materials with low humidity without the need to prepare an ordinary drum dryer, saving production costs. Or when the equipment needs to be maintained and repaired, the staff can withdraw the pneumatic telescopic rod and the material blocking component from the drum, which is convenient for the staff to perform daily maintenance and repair of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is a perspective view of the present invention;

[0021] Figure 2 It is a front view of the present invention;

[0022] Figure 3 It is a left side view of the present invention;

[0023] Figure 4 It is a right side view of the present invention;

[0024] Figure 5 is a top view of the present invention;

[0025] Figure 6 This invention Figure 5 Cross-sectional view at AA in the middle;

[0026] Figure 7 It is a schematic diagram of the cooperation between the pneumatic telescopic rod and the material blocking component in the drum of the present invention;

[0027] Figure 8 Schematic diagram of the initial state of the pneumatic telescopic rod and the material blocking component in the present invention;

[0028] Figure 9 This invention Figure 7 Enlarged view of point B in the middle;

[0029] Figure 10 This invention Figure 6 Enlarged view of point C in the middle.

[0030] In the figure: 1. Drum; 11. Gear ring; 12. Fixed ring; 13. Copying plate; 14. Feed port; 15. Discharge port; 2. Fixed frame; 21. First servo motor; 22. Driving gear; 23. Support wheel; 24. Placement plate; 241. Slide; 25. First mounting platform; 26. Slider; 27. Second mounting platform; 28. Exhaust fan; 3. Pneumatic telescopic rod; 31. First telescopic rod; 32. Second telescopic rod; 33. Third telescopic rod; 4. Material blocking component; 41. Main material blocking bag; 42. Auxiliary material blocking bag; 43. Air guide pipe; 44. Connecting pipe; 45. Leakage hole; 46. Filter cloth. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] like Figures 1 to 10 As shown, the present invention shows a drum dryer, which is specifically as follows;

[0033] The present invention comprises a drum 1, wherein the drum 1 comprises a heating device (not shown); a fixing frame 2 is provided at the bottom of the drum 1; a gear ring 11 is provided on the outer ring of the drum 1, and the gear ring 11 is fixedly connected to the drum 1 through a support column; two fixing rings 12 are provided on the outer ring of the drum 1, and each fixing ring 12 is fixedly connected to the drum 1 through a support column; a plurality of groups of copying plates 13 are fixedly installed on the inner ring of the drum 1, and each group of copying plates 13 is evenly arranged along the circumferential direction of the drum 1; the copying plates 13 have a certain angle with the circumferential direction of the drum 1; a first servo motor 21 is fixedly installed on the fixing frame 2 on both sides of the drum 1; a driving gear 22 is fixedly installed on the output end of the two first servo motors 21, and the driving gears 22 are meshed with the gear ring 11; support wheels 23 are installed on the fixing frame 2 on both sides of the drum 1 and at positions corresponding to the fixing rings 12; the support wheels 23 are rotatably connected to the fixing frame 2 and support the drum 1; a feed port 14 is provided at one end of the drum 1; a discharge port 15 is provided at the other end of the drum 1;

[0034] Two symmetrically arranged placing plates 24 are fixedly installed on one side of the fixing frame 2 near the feeding port 14; a first mounting platform 25 is provided on the placing plate 24; a pneumatic telescopic rod 3 is fixedly installed on the first mounting platform 25, and the pneumatic telescopic rod 3 is parallel to the fixing frame 2; the output end of the pneumatic telescopic rod 3 extends into the drum 1; the telescopic rods of the pneumatic telescopic rod 3 are divided into three-level telescopic rods, namely a first telescopic rod 31, a second telescopic rod 32 and a third telescopic rod 33; one end of the first telescopic rod 31, the second telescopic rod 32 and the third telescopic rod 33 are all provided with a blocking component 4; the blocking component 4 includes a main blocking bag 41 and Auxiliary material-blocking bag 42; one of the auxiliary material-blocking bags 42 is connected to an external air pump through a hose; the outer circles of the first telescopic rod 31, the second telescopic rod 32 and the third telescopic rod 33 are all fixedly connected with auxiliary material-blocking bags 42; each of the auxiliary material-blocking bags 42 is provided with an evenly arranged air guide tube 43; the other end of the air guide tube 43 on each of the auxiliary material-blocking bags 42 is commonly fixedly connected to the main material-blocking bag 41, and the main material-blocking bag 41 and the auxiliary material-blocking bag 42 are connected through the air guide tube 43; each of the adjacent auxiliary material-blocking bags 42 is fixedly installed with an evenly arranged connecting tube 44, and each of the adjacent auxiliary material-blocking bags 42 is connected through the connecting tube 44.

[0035] When the material needs to be dried, the drum dryer is first preheated, and then the staff turns on the drum dryer. The heating device of the drum dryer starts to heat the drum 1. It can be understood that this heating device is used to supply a heat source or heat the drum 1. The first servo motor 21 starts to drive the driving gear 22 to rotate, and the driving gear 22 drives the gear ring 11 to rotate. Since the gear ring 11 is fixedly connected to the drum 1 through the support column, the drum 1 will start to rotate. At the same time, the staff adjusts the first telescopic rod 31, the second telescopic rod 32 and the third telescopic rod 33 of the pneumatic telescopic rod 3 to the appropriate length, and the external air pump continues to increase the height. The hot and dry gas is transported from the hose to one of the auxiliary material-blocking bags 42. The hot and dry gas in the auxiliary material-blocking bag 42 flows into the other auxiliary material-blocking bags 42 and the main material-blocking bag 41 through the connecting pipe 44 and the air guide pipe 43 respectively. As the amount of gas entering increases, the main material-blocking bag 41 and the auxiliary material-blocking bag 42 gradually stretch and expand under the action of the high-temperature dry gas introduced. When the main material-blocking bag 41 and the auxiliary material-blocking bag 42 stretch and expand to their limit positions, the main material-blocking bag 41 and the auxiliary material-blocking bag 42 are annular. At this time, the main material-blocking bag 41 does not contact the copying plate 13 in the drum 1, so as to avoid the main material-blocking bag 41 and the copying plate 13 from scratching when the drum 1 rotates.

[0036] When the drum 1 is heated to the set temperature, the staff feeds the material into the drum 1 from the feed port 14. Since the copying plate 13 rotates with the rotation of the drum 1, the material can be turned over when the copying plate 13 rotates, so that the material can fully contact with the heated drum 1 to dry the material. At the same time, since there is a certain angle between the copying plate 13 and the circumferential direction of the drum 1, the material will move from the feed port 14 along the direction of the drum 1 to the discharge port 15. When the material moves to the discharge port 15, the material is dried and then flows out from the discharge port 15, which is convenient for the staff to collect the dried material for the next step of processing;

[0037] Specifically, in the process of drying the material, after the material enters the drum 1 from the feed port 14, the lifting plate 13 rotates with the drum 1, and the lifting plate 13 will transport the material along the drum 1 to one end of the discharge port 15 while stirring the material, so that the material is in more complete contact with the heated drum 1, thereby drying the material. When the lifting plate 13 stirs the material, part of the material will collide with the main material-blocking bag 41 and the auxiliary material-blocking bag 42 and the air guide tube 43 that are expanded into a ring shape after being filled with gas. Due to the collision, the main material-blocking bag 41, the auxiliary material-blocking bag 42 and the air guide tube 43 will break up some of the wet materials that are stuck together, so that the material is in more complete contact with the drum 1, and at the same time At the same time, since the main material-blocking bag 41, the auxiliary material-blocking bag 42 and the air guide tube 43 are filled with high-temperature dry gas, when the wet material collides with the main material-blocking bag 41, the auxiliary material-blocking bag 42 and the air guide tube 43, the temperature will be transferred to the material, drying the material, thereby enhancing the drying effect of the material. At the same time, for some wet materials that are still stuck together, after being heated by the collision of the main material-blocking bag 41, the auxiliary material-blocking bag 42 and the air guide tube 43, part of the material will collide with the main material-blocking bag 41, the auxiliary material-blocking bag 42 and the air guide tube 43 again under the turning of the copying plate 13, thereby making it easier to break up the part of the material with higher humidity, so that the material can obtain a better drying effect.

[0038] When the material moves to between the two adjacent blocking parts 4 under the action of the lifting plate 13, since the main blocking bag 41 and the auxiliary blocking bag 42 have expanded to the limit at this time, the annular main blocking bag 41 and the auxiliary blocking bag 42 will form a relatively closed space with the inner wall of the drum 1. Since the temperatures of the drum 1, the main blocking bag 41 and the auxiliary blocking bag 42 are relatively high, the temperature between the blocking parts 4 will be more concentrated and higher than the space from the feed port 14 to the blocking part 4 or from the blocking part 4 to the discharge port 15. Therefore, when the material enters this part of the space, the moisture in the material can be evaporated faster, thereby obtaining a better drying effect. At the same time, the main blocking bag 41 and the auxiliary blocking bag 42 Through the evenly arranged air guide pipes 43, the humid air formed after the moisture contained in the material evaporates into the air during drying can flow through the gaps formed by the main material blocking bag 41, the auxiliary material blocking bag 42 and the air guide pipes 43, avoiding the accumulation of humid air in the drum 1, thereby affecting the drying effect of the material. When the material continues to move along the drum 1 toward the discharge port 15, the material will collide with the blocking component 4 again and enter between the adjacent blocking components 4, further enhancing the drying effect of the material. Then the material continues to move toward the discharge port 15. When the material moves to the position of the discharge port 15 and leaves the drum 1 from the discharge port 15, the material has completed drying and is waiting for the next step of processing.

[0039] Since the communicating tube 44 connects the two adjacent auxiliary material-stopping bags 42, the pressure of the gas in the two adjacent auxiliary material-stopping bags 42 is the same. Moreover, since the auxiliary material-stopping bags 42 and the main material-stopping bags 41 are connected through the air guide tube 43, the pressure of the gas in the two adjacent main material-stopping bags 41 is also the same, thereby avoiding the different expansion and contraction degrees of the material-stopping component 4 due to the different gas pressures in the main material-stopping bags 41 and the auxiliary material-stopping bags 42, thereby making it impossible for the material-stopping component 4 to form a relatively closed space with the inner wall of the drum 1. At the same time, due to the pressure of the high-temperature dry gas in the communicating tube 44, the communicating tube 44 can also play a certain supporting role on the auxiliary material-stopping bags 42, preventing the auxiliary material-stopping bags 42 from tilting, resulting in a decrease in the sealing effect, thereby making it impossible to form a space with relatively concentrated heat in the drum 1.

[0040] Furthermore, when the material humidity is low, the staff shortens the extension distance of the first telescopic rod 31, the second telescopic rod 32, and the third telescopic rod 33, so that the space between adjacent material blocking parts 4 is reduced, thereby reducing the area where the temperature inside the drum 1 is concentrated, and shortening the time for the material with lower humidity to pass through this part of the space, thereby avoiding excessive drying in the drum 1 and affecting the material quality. When the material humidity is high, the staff increases the extension distance of the first telescopic rod 31, the second telescopic rod 32, and the third telescopic rod 33, so that the space between adjacent material blocking parts 4 is increased, thereby increasing the area where the temperature inside the drum 1 is concentrated, and increasing the time for the material with higher humidity to pass through this part of the space, thereby enhancing the drying effect of the material, so that when the drum 1 is drying material with relatively high humidity, there is no need to reduce the speed of the drum 1 to enhance the drying effect of the material, thereby avoiding reducing the stirring effect of the material on the material by the shovel 13 due to reducing the speed of the drum 1, causing the material to accumulate in the drum 1, affecting the drying effect of the material, and causing the material to be incompletely dried.

[0041] When the pneumatic telescopic rod 3 is extended to its limit, the top end of the third telescopic rod 33 is still inside the drum 1. At this time, the distance between adjacent material blocking components 4 reaches its maximum, and the relatively independent space formed by the material blocking components 4 and the inner wall of the drum 1 also reaches its maximum, so the drying effect on the material is also maximized.

[0042] When all the materials have been dried and leave the drum 1, the external air pump stops supplying high-temperature dry air to the auxiliary material-blocking bag 42 through the hose, and the material-blocking component 4 gradually shrinks to its original state. At the same time, the pneumatic telescopic rod 3 also gradually shrinks back to its original state, the first servo motor 21 stops working, the speed of the driving gear 22 gradually decreases, and the drum 1 also gradually slows down and finally stops rotating.

[0043] In this process, part of the material collides with the baffle member 4 filled with high-temperature dry gas under the turning of the lifting plate 13, so that the temperature of the baffle member 4 can be transferred to the material, thereby enhancing the drying effect of the material. At the same time, a relatively closed space is formed between the inflated baffle member 4 and the drum 1, so that the temperature in this space is more concentrated. When the material passes through this space, a better drying effect is obtained under the turning of the lifting plate 13. At the same time, by controlling the elongation or shortening of the pneumatic telescopic rod 3 in the drum 1, the distance between the baffle members 4 is controlled to increase or decrease. In this way, the expansion or reduction of this relatively closed space is controlled, so that the material with high humidity can still obtain the best drying effect without reducing the rotation speed of the drum 1, thereby avoiding the situation that when the drum 1 rotates at a low speed, the rotation speed of the shovel 13 is reduced, the stirring amplitude of the material by the shovel 13 is reduced, and the material does not fully contact the inner wall of the drum 1, resulting in a reduction in the stirring effect of the shovel 13 on the material. At the same time, it also avoids the situation that the transmission speed of the material in the drum 1 is reduced due to the reduction in the rotation speed of the shovel 13, the material is accumulated in the drum 1, and the material is not completely dried.

[0044] In a specific embodiment, the connecting pipe 44 is a telescopic hose;

[0045] Since the connecting tube 44 is a telescopic tube, when the connecting tube 44 moves inside the drum 1 as the pneumatic telescopic rod 3 extends or contracts, the connecting tube 44 will not fall off.

[0046] Specifically, the cross-sections of the main material-blocking bag 41 and the auxiliary material-blocking bag 42 are arch-shaped;

[0047] When the material is picked up by the lifting plate 13 and stir-fried, part of the material will collide with the main material-blocking bag 41, the auxiliary material-blocking bag 42 and the air guide tube 43. The main material-blocking bag 41 and the auxiliary material-blocking bag 42 with arched cross-sections can increase the collision area with the turned material, thereby making it easier to disperse the material that is stuck together due to high humidity. After the dispersed material falls back to the inner wall of the drum 1, it has more complete contact with the inner wall of the drum 1, thereby enhancing the drying effect of the drum 1 on the material with high humidity. At the same time, the larger contact area between the main material-blocking bag 41 and the auxiliary material-blocking bag 42 and the material also enables the main material-blocking bag 41 and the auxiliary material-blocking bag 42 to conduct more heat to the material, thereby enhancing the drying effect of the material.

[0048] Specifically, the main material blocking bag 41 and the auxiliary material blocking bag 42 are made of fluororubber;

[0049] The main material-stopping bladder 41 and the auxiliary material-stopping bladder 42 made of fluororubber have excellent heat resistance, which can prevent the main material-stopping bladder 41 and the auxiliary material-stopping bladder 42 from being damaged by heat in a high-temperature environment.

[0050] Specifically, the placement plates 24 are each provided with a slide groove 241; two symmetrically arranged sliders 26 are fixedly mounted on the bottom of the first mounting platform 25; the two sliders 26 slide in adjacent slide grooves 241;

[0051] Since the first mounting platform 25 is fixedly connected to the slider 26, the first mounting platform 25 can slide along the slide groove 241 on the placement plate 24. Therefore, when the rolling dryer dries materials with very low humidity, and the heated drum 1 alone can complete the drying of the materials, the staff can push the first mounting platform 25 to slide along the slide groove 241 on the placement plate 24 on the placement plate 24 in the direction away from the drum 1 by adjusting the pneumatic telescopic rod 3 to the initial state, thereby completely withdrawing the pneumatic telescopic rod 3 from the drum 1. At this time, the drum 1 becomes an ordinary drum dryer, thereby meeting the needs of drying materials with low humidity without the need to prepare an ordinary drum dryer, saving production costs. Or when the equipment needs to be maintained and repaired, the staff can withdraw the pneumatic telescopic rod 3 and the material blocking component 4 from the drum 1, which is convenient for the staff to perform daily maintenance and repairs on the machine.

[0052] Specifically, the surfaces of the two adjacent main material blocking bags 41 facing each other are provided with evenly arranged air leakage holes 45, and filter cloths 46 are fixedly mounted on the air leakage holes 45;

[0053] When the material moves between two adjacent blocking components 4, the shovel 13 continues to turn the material, and part of the material collides with the main blocking bag 41. At this time, the air leakage hole 45 of the main blocking bag 41 is equipped with a filter cloth 46, which can prevent the material from entering the main blocking bag 41 through the air leakage hole 45. At the same time, the high-temperature dry gas in the main blocking bag 41 can also be ejected from the air leakage hole 45, so that the moist material is in full contact with the ejected high-temperature dry gas, thereby enhancing the drying effect on the material. At the same time, the ejected high-temperature dry gas can also heat the space between the adjacent blocking components 4, so that the temperature of this part of the space is more concentrated, further enhancing the drying effect on the material. Since the filter cloth 46 is fixedly installed in the air leakage hole 45, when the material is in powder form, it can also prevent the material from entering the main blocking bag 41.

[0054] Specifically, a second mounting platform 27 is fixedly installed on one side of the fixing frame 2 close to the discharge port 15; an exhaust fan 28 is fixedly installed on one end of the second mounting platform 27 away from the fixing frame 2;

[0055] When the material needs to be dried, the staff turns on the drum dryer, and the exhaust fan 28 starts to start, and the air in the drum 1 is discharged from the discharge port 15;

[0056] Specifically, since the moisture of the material in the drum 1 will evaporate into the air after being dried, the humidity of the air in the drum 1 becomes high, which is not conducive to the drying of the material. Therefore, the exhaust fan 28 can accelerate the discharge of the moist air in the drum 1, strengthen the flow of air in the drum 1, and make the material scooped by the scooping board 13 fully contact with the dry air, thereby enhancing the drying effect of the material. At the same time, due to the continuous turning of the material by the scooping board 13 in the drum 1, the tiny dust on the material will be raised and mixed into the air. At this time, the exhaust fan 28 can accelerate the discharge of the air mixed with dust, keeping the air in the drum 1 relatively clean.

[0057] When the material is in powder form, the exhaust fan 28 stops participating in the drying process to prevent the exhaust fan 28 from discharging the dried powdered material from the drum 1, causing waste.

[0058] Specifically, the air guide tube 43 is a bellows;

[0059] The air duct 43 made of the bellows has a certain degree of elasticity. When the main material-blocking bag 41 and the auxiliary material-blocking bag 42 stretch and expand under the action of the high-temperature dry gas, the air duct 43 will not fall off, and has a certain supporting effect on the main material-blocking bag 41 and the auxiliary material-blocking bag 42. At the same time, when the material turned by the copying plate 13 collides with the air duct 43, the contact area between the material and the air duct 43 is increased, so that the materials stuck together are more easily broken up, so that the materials are fully in contact with the high-temperature dry gas ejected from the inner wall of the drum 1 and the leakage hole 45, thereby enhancing the drying effect of the material.

[0060] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A drum dryer, comprising a drum (1); a fixing frame (2) is laid on the bottom of the drum (1); a gear ring (11) is provided on the outer ring of the drum (1), and the gear ring (11) is fixedly connected to the drum (1) through a support column; two fixing rings (12) are provided on the outer ring of the drum (1), and each fixing ring (12) is fixedly connected to the drum (1) through a support column; a plurality of groups of copying plates (13) are fixedly installed on the inner ring of the drum (1), and each group of copying plates (13) is evenly arranged along the circumferential direction of the drum (1); the copying plates (13) have a certain angle with the circumferential direction of the drum (1); the fixing A first servo motor (21) is fixedly mounted on both sides of the roller (1) on the fixed frame (2); a driving gear (22) is fixedly mounted on the output ends of the two first servo motors (21), and the driving gears (22) are meshed with the gear ring (11); support wheels (23) are mounted on both sides of the roller (1) and at positions corresponding to the fixed ring (12) on the fixed frame (2); the support wheels (23) are rotatably connected to the fixed frame (2) and support the roller (1); a feed port (14) is provided at one end of the roller (1); and a discharge port (15) is provided at the other end of the roller (1); Its characteristics are: Two symmetrically arranged placing plates (24) are fixedly installed on one side of the fixing frame (2) near the feeding port (14); a first mounting platform (25) is provided on the placing plate (24); a pneumatic telescopic rod (3) is fixedly installed on the first mounting platform (25), and the pneumatic telescopic rod (3) is parallel to the fixing frame (2); the output end of the pneumatic telescopic rod (3) extends into the roller (1); the telescopic rod of the pneumatic telescopic rod (3) is divided into three-level telescopic rods, namely a first telescopic rod (31), a second telescopic rod (32) and a third telescopic rod (33); one end of the first telescopic rod (31), the second telescopic rod (32) and the third telescopic rod (33) are all provided with a blocking component (4); the blocking component (4) includes three main blocking bags (41) and an auxiliary blocking bag (42) arranged therein; the first telescopic rod (31), the second telescopic rod (32) and the third telescopic rod (33) are respectively ... first telescopic rod (31), the second telescopic rod (32) and the third telescopic rod (33) are respectively provided with a blocking component ( The outer rings of the second telescopic rod (32) and the third telescopic rod (33) are both fixedly connected with auxiliary material-blocking bags (42), one of which is communicated with an external air pump through a hose; each of the auxiliary material-blocking bags (42) is provided with an evenly arranged air guide tube (43); the other end of the air guide tube (43) on each of the auxiliary material-blocking bags (42) is commonly fixedly connected with a main material-blocking bag (41), and the main material-blocking bag (41) and the auxiliary material-blocking bag (42) are communicated through the air guide tube (43); each of the two adjacent auxiliary material-blocking bags (42) is fixedly installed with an evenly arranged connecting tube (44), and each of the two adjacent auxiliary material-blocking bags (42) is communicated through the connecting tube (44), the main material-blocking bag (41) and the auxiliary material-blocking bag (42) stretch and expand under the action of the high-temperature gas, and the main material-blocking bag (41) does not contact the copying plate (13) in the drum (1); The opposing surfaces of the two adjacent main material-blocking bags (41) are provided with evenly arranged air leakage holes (45), and filter cloths (46) are fixedly mounted on the air leakage holes (45).

2. The drum dryer according to claim 1, characterized in that: The communicating pipe (44) is a telescopic hose.

3. The drum dryer according to claim 2, characterized in that: The cross sections of the main material-blocking bag (41) and the auxiliary material-blocking bag (42) are arch-shaped.

4. The drum dryer according to claim 3, characterized in that: The main material-blocking bag (41) and the auxiliary material-blocking bag (42) are made of fluororubber.

5. The drum dryer according to claim 1, characterized in that: The placement plates (24) are each provided with a slide groove (241); two symmetrically arranged slide blocks (26) are fixedly mounted on the bottom of the first mounting platform (25); and the two slide blocks (26) slide in adjacent slide grooves (241).

6. The drum dryer according to claim 1, characterized in that: A second mounting platform (27) is fixedly mounted on one side of the fixing frame (2) close to the discharge port (15); an exhaust fan (28) is fixedly mounted on one end of the second mounting platform (27) away from the fixing frame (2).

7. The drum dryer according to claim 1, characterized in that: The air guide tube (43) is a corrugated tube.

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