CN117168107A - Drum-type dryer - Google Patents

Abstract

The invention belongs to the technical field of drying devices, in particular to a roller dryer which comprises a roller; a fixing frame is paved at the bottom of the roller; two placing plates are fixedly arranged on one side of the fixing frame; a first mounting table is arranged on the placing plate; a pneumatic telescopic rod is fixedly arranged on the first mounting table; the telescopic rods of the pneumatic telescopic rods are divided into three-stage telescopic rods, namely a first telescopic rod, a second telescopic rod and a third telescopic rod; one end, far away from the first mounting table, of each of the first telescopic rod, the second telescopic rod and the third telescopic rod is sleeved with a material blocking part; a second mounting table is fixedly mounted on one side, close to the discharge hole, of the fixing frame; an exhaust fan is fixedly arranged at one end, far away from the fixed frame, of the second mounting table; the invention mainly solves the problems that the rotating speed of the roller is required to be reduced for materials with higher humidity, so that the materials are accumulated in the roller, and the materials are not completely dried.

Description

A drum dryer

Technical field

The invention belongs to the technical field of drying devices, specifically a drum dryer.

Background technique

In the processing and production fields of modern grain, food, chemicals, medicine, agricultural and sideline products, forage, and industrial raw materials, it is usually necessary to dry the raw materials for the next step of processing and production. The most commonly used equipment is the drum dryer.

The drum dryer mainly uses a slightly inclined cylinder that can rotate along the circumference. The wet material enters from one end. The lifting plate set in the cylinder continuously lifts and drops the material as the cylinder rotates, so that It is fully in contact with the hot air entering from the feed end or discharge end to improve drying efficiency, while moving the material forward, and finally collecting the dry material from the other end. The drum dryer has large processing capacity, low fuel consumption, low drying cost, high temperature resistance, strong scalability, smooth cylinder operation and high reliability.

However, in daily work, we found that for materials with high humidity, the drum dryer needs to reduce the speed of the drum to increase the retention time of the material in the drum, thereby increasing the drying time and ensuring complete drying of the material.

However, after reducing the speed of the drum, the speed of the lifting plate will also decrease, and the amplitude of the flipping of the material by the lifting plate will be reduced, so that the material cannot fully contact the inner wall of the drum, so that the stir-frying effect of the lifting plate on the material will also be reduced. Moreover, due to the reduction of the speed of the lifting plate, the transportation efficiency of the materials in the drum will also be reduced, which will easily lead to the accumulation of materials in the drum, resulting in incomplete drying of the materials.

Contents of the invention

In order to make up for the shortcomings of the existing technology and solve the above technical problems, the present invention proposes a drum dryer.

The technical solution adopted by the present invention to solve the technical problem is: a drum dryer according to the present invention, including 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 The drum is fixedly connected to the drum through the support column; the outer ring of the drum is provided with two fixed rings, and each fixed ring is fixedly connected to the drum through the support column; the inner ring of the drum is fixedly equipped with multiple sets of copying plates, and each set of copying plates is fixedly installed. The plates are evenly arranged along the circumferential direction of the drum; the copying plate has 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; the output ends of the two first servo motors are fixed A driving gear is installed, and the driving gears are meshed with the gear ring; support wheels are installed on both sides of the drum at positions corresponding to the fixed ring on the fixed frame; the supporting wheels are rotationally connected to the fixed frame, and support the drum For support; one end of the drum is provided with a feed port; the other end of the drum is provided with a discharge port;

Two symmetrically arranged placement plates are fixedly installed on one side of the fixed frame near the feed inlet; a first installation platform is provided on the placement plate; a pneumatic telescopic rod is fixedly installed on the first installation platform, and the pneumatic telescopic rod is fixedly installed on the first installation platform. The rod is parallel to the fixed 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 levels of telescopic rods, namely the first telescopic rod, the second telescopic rod and the third telescopic rod; One end of the first telescopic rod, the second telescopic rod and the third telescopic rod is equipped with a baffle component; the baffle component includes a main baffle bag and a auxiliary baffle bag; one of the auxiliary baffle bags It is connected to the 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 baffle bags; each of the auxiliary baffle bags is provided with a uniform arrangement The air guide tube; the other end of the air guide tube on each auxiliary material bag is connected to a main material bag, and the main material bag and the auxiliary material bag are connected through the air guide tube; two adjacent ones The auxiliary baffle bags are all fixedly installed with evenly arranged communication tubes, and two adjacent auxiliary baffle bags are connected through the communication tubes.

Preferably, the communication pipe is a telescopic hose.

Preferably, the main baffle bag and the auxiliary baffle bag have an arc-shaped cross-section.

Preferably, the main baffle bag and the auxiliary baffle bag are made of fluorine rubber.

Preferably, the placing plates are provided with chute; two symmetrically arranged slide blocks are fixedly installed on the bottom of the first mounting platform; both of the two slide blocks slide in adjacent chute.

Preferably, the opposite surfaces of the two adjacent main baffle bags are provided with evenly arranged air leakage holes, and a filter cloth is fixedly installed on the air leakage holes.

Preferably, a second installation 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 installation platform away from the fixed frame.

Preferably, the air guide tube is a corrugated tube.

The beneficial effects of the present invention are as follows:

1. In the drum dryer of the present invention, because part of the material collides with the baffle parts filled with high-temperature dry gas under the flipping of the lifting plate, the temperature of the baffle parts can be transmitted to the materials, strengthening the In order to improve the drying effect of the material, at the same time, a relatively closed space is formed between the inflated blocking part and the drum, so that the temperature in this space is more concentrated. When the material passes through this space, it is better dried under the flipping of the lifting plate. At the same time, by controlling the elongation or shortening of the pneumatic telescopic rod in the drum, the distance between the blocking parts is controlled to increase or decrease, thereby controlling the increase or decrease of this relatively closed space, so that the humidity Larger materials can still get the best drying effect without reducing the drum speed, thus avoiding the low rotation speed of the lifting plate when the drum speed is low, which will reduce the turning range of the material by the lifting plate and cause the material to dry. There is no full contact with the inner wall of the drum, which results in a reduction in the stir-frying effect of the lifting plate on the material. At the same time, it also avoids a reduction in the transmission speed of the material in the drum due to the reduction in the rotation speed of the lifting plate, causing the material to accumulate in the drum, resulting in incomplete drying of the material. Case.

2. In the drum dryer of the present invention, since the first installation platform is fixedly connected to the slider, the first installation platform can slide along the chute on the placement plate. Therefore, when the roller dryer is suitable for conditions with very low humidity, When the material is drying and the material can be dried only by relying on the heated roller, the staff can push the first installation platform along the chute on the placement plate by adjusting the pneumatic telescopic rod to the initial state. Slide in the direction away from the drum to completely withdraw the pneumatic telescopic rod from the drum. At this time, the drum becomes an ordinary drum dryer, which can dry low-humidity materials without the need to prepare an ordinary drum dryer. , saving production costs, or when the equipment needs to be maintained and inspected, the staff can withdraw the pneumatic telescopic rod and stopper components from the drum to facilitate the staff to perform daily maintenance and inspection of the machine.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Figure 1 is a perspective view of the present invention;

Figure 2 is a front view of the present invention;

Figure 3 is a left side view of the present invention;

Figure 4 is a right side view of the present invention;

Figure 5 is a top view of the present invention;

Figure 6 is a cross-sectional view at A-A in Figure 5 of the present invention;

Figure 7 is a schematic diagram of the cooperation between the pneumatic telescopic rod and the blocking component in the drum according to the present invention;

Figure 8 is a schematic diagram of the initial state of the pneumatic telescopic rod and the blocking component in the present invention;

Figure 9 is an enlarged view of B in Figure 7 of the present invention;

Figure 10 is an enlarged view of C in Figure 6 of the present invention.

In the picture: 1. Drum; 11. Gear ring; 12. Fixed ring; 13. Copy plate; 14. Feed port; 15. Discharge port; 2. Fixed frame; 21. First servo motor; 22. Driving gear ; 23. Support wheel; 24. Placement plate; 241. Chute; 25. First installation platform; 26. Slider; 27. Second installation platform; 28. Exhaust fan; 3. Pneumatic telescopic rod; 31. First telescopic Rod; 32. Second telescopic rod; 33. Third telescopic rod; 4. Blocking parts; 41. Main blocking bag; 42. Secondary blocking bag; 43. Air guide tube; 44. Connecting tube; 45. Air leakage hole; 46, filter cloth.

Detailed ways

In order to make it easy to understand the technical means, creative features, objectives and effects achieved by the present invention, the present invention will be further elaborated below in conjunction with specific implementation modes.

As shown in Figures 1 to 10, the present invention shows a drum dryer, specifically as follows;

It includes a drum 1; the drum 1 includes a heating device (not shown); a fixing frame 2 is laid on the bottom of the drum 1; a gear ring 11 is set in the outer ring of the drum 1, and the gear ring 11 is connected to the drum 1 through a support column Fixedly connected; the outer ring of the drum 1 is provided with two fixed rings 12, and each fixed ring 12 is fixedly connected to the drum 1 through a support column; the inner ring of the drum 1 is fixedly equipped with multiple sets of copying plates 13, each group The copying plate 13 is evenly arranged along the circumferential direction of the drum 1; the copying plate 13 has a certain angle with the circumferential direction of the drum 1; the first servo motor 21 is fixedly installed on the fixing frame 2 on both sides of the drum 1; the two The output ends of the first servo motors 21 are fixedly installed with driving gears 22, and the driving gears 22 are meshed with the gear ring 11; the fixed frame 2 is equipped with supports on both sides of the drum 1 and at positions corresponding to the fixed ring 12 Wheel 23; the support wheels 23 are all rotatably connected to the fixed frame 2 and support the drum 1; one end of the drum 1 is provided with a feed port 14; the other end of the drum 1 is provided with a discharge port 15;

Two symmetrically arranged placing plates 24 are fixedly installed on one side of the fixing frame 2 close to the feed inlet 14; a first mounting platform 25 is provided on the placing plate 24; and a first mounting platform 25 is fixedly installed on the first mounting platform 25. The pneumatic telescopic rod 3 is parallel to the fixed frame 2; the output end of the pneumatic telescopic rod 3 extends into the drum 1; the telescopic rod of the pneumatic telescopic rod 3 is divided into three levels of telescopic rods, each of which is the first telescopic rod. The rod 31, the second telescopic rod 32 and the third telescopic rod 33; one end of the first telescopic rod 31, the second telescopic rod 32 and the third telescopic rod 33 is covered with a blocking part 4; the blocking part 4 includes a main blocking bag 41 and an auxiliary blocking bag 42; one of the auxiliary blocking bags 42 is connected to an external air pump through a hose; the first telescopic rod 31, the second telescopic rod 32, and the third telescopic rod 33 The outer ring is fixedly connected with a auxiliary material bag 42; each auxiliary material bag 42 is provided with a uniformly arranged air guide tube 43; the other part of the air guide tube 43 on each auxiliary material bag 42 is A main baffle bag 41 is fixedly connected to one end, and the main baffle bag 41 and the auxiliary baffle bag 42 are connected through the air guide tube 43; the two adjacent auxiliary baffle bags 42 are fixedly installed with evenly arranged The communicating tube 44 is connected with two adjacent auxiliary blocking bags 42 through the communicating tube 44 .

When the material needs to be dried, the drum dryer is first preheated, and then the staff starts the drum dryer, and the heating device of the drum dryer begins to heat drum 1. It can be understood that this heating device is used In order 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 and the drum 1 are fixedly connected through the support column, the drum 1 will start to rotate. At the same time, the staff adjusted 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 continued to transport the high-temperature dry gas from the hose to one of the auxiliary stops. In the bag 42, the high-temperature and dry gas in the auxiliary baffle bag 42 will flow into other auxiliary baffle bags 42 and the main baffle bag 41 respectively through the connecting pipe 44 and the air guide tube 43. As the incoming gas continues to increase, the main baffle bag 42 will flow into the main baffle bag 41. The material bag 41 and the auxiliary material bag 42 gradually expand and expand under the action of the high-temperature and dry gas. When the main material bag 41 and the auxiliary material bag 42 stretch and expand to the extreme position, the main material bag 41 and the auxiliary material bag 42 The bag 42 is annular. At this time, the main baffle bag 41 is not in contact with the copying plate 13 in the drum 1, so as to avoid the main baffle bag 41 and the copying plate 13 from being scratched when the drum 1 rotates;

When the drum 1 is heated to the set temperature, the staff sends the material into the inside of the drum 1 from the feed port 14. Since the lifting plate 13 rotates with the rotation of the drum 1, the material can be turned over when the lifting plate 13 rotates. , so that the material can be fully contacted with the heated drum 1 to dry the material. At the same time, because there is a certain angle between the lifting plate 13 and the circumferential direction of the drum 1, the material will flow out from the feed port 14 along the direction of the drum 1 The material port 15 moves. When the material moves to the outlet 15, the material completes drying and then flows out from the outlet 15, making it convenient for the staff to collect the dried materials for the next step of processing;

Specifically, during the drying process of materials, after the materials enter the drum 1 from the feed port 14, the lifting plate 13 rotates with the drum 1, and the lifting plate 13 will move the material along the drum 1 to the discharge port 15. While transporting, the materials are stir-fried to make the materials more fully in contact with the heated drum 1, so that the materials are dried. When the materials are stir-fried by the lifting plate 13, part of the materials will be filled with gas and expand into a circular ring. The main baffle bag 41 collides with the auxiliary baffle bag 42 and the air guide tube 43. Due to the collision, the main baffle bag 41, the auxiliary baffle bag 42 and the air guide tube 43 will break up the partially bonded wet materials. Make the material contact with the drum 1 more fully. At the same time, because the main baffle bag 41, the auxiliary baffle bag 42 and the air guide tube 43 are filled with high-temperature dry gas, when the wet material comes into contact with the main baffle bag 41, the auxiliary baffle bag 42 When the air guide tube 43 collides, the temperature will be transmitted to the material to dry the material, thereby enhancing the drying effect of the material. At the same time, some wet materials that are still bonded together will pass through the main baffle bag 41 and the auxiliary baffle bag. After the collision and heating of the bag 42 and the air guide tube 43, under the flipping of the lifting plate 13, some materials will collide with the main baffle bag 41, the auxiliary baffle bag 42 and the air guide tube 43 again, thereby causing the part with higher humidity to The material is easier to break up, so that the material can get better drying effect;

When the material moves 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 The bag 41 and the auxiliary baffle 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 baffle bag 41 and the auxiliary baffle bag 42 are relatively high, they are In the space between the material part 4 or the baffle part 4 and the discharge port 15, the temperature between the baffle parts 4 will be more concentrated and the temperature will be higher. Therefore, when the material enters this part of the space, the moisture in the material can be accelerated. evaporate, thereby obtaining a better drying effect. At the same time, the main baffle bag 41 and the auxiliary baffle bag 42 are connected through the evenly arranged air guide tube 43, so that the moisture contained in the material evaporates into the air during drying and the moist air formed can It flows through the gap formed by the main baffle bag 41, the auxiliary baffle bag 42 and the air guide tube 43 to avoid the accumulation of moist air in the drum 1, thereby affecting the drying effect of the material. When the material continues to be discharged along the drum 1 When the material moves in the direction of outlet 15, the material will collide with the blocking parts 4 again and enter between the adjacent blocking parts 4, further enhancing the drying effect on the material. Then the material will continue to move in the direction of the outlet 15. When the material moves to When the discharge port is at position 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;

Since the connecting pipe 44 connects two adjacent auxiliary baffle bags 42, the gas pressure in the two adjacent auxiliary baffle bags 42 is the same, and because the auxiliary baffle bags 42 and the main baffle bag 41 They are connected through the air guide tube 43, so the pressure of the gas inside the two adjacent main baffle bags 41 is also the same, so it is avoided that the baffle component 4 is caused by the different gas pressures in the main baffle bag 41 and the auxiliary baffle bag 42. The degree of telescopic expansion is different, so that the baffle component 4 and the inner wall of the drum 1 cannot form a relatively closed space. At the same time, due to the pressure of the high-temperature dry gas in the communication tube 44, the communication tube 44 can also play a role in the auxiliary baffle bag 42. It has a certain supporting effect to prevent the auxiliary baffle bag 42 from tilting, resulting in a decrease in the sealing effect, resulting in the inability to form a space in the drum 1 where heat is relatively concentrated;

Furthermore, when the humidity of the material 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 the adjacent material blocking parts 4 is reduced. This reduces the area where the temperature is concentrated inside the drum 1, shortens the time for materials with lower humidity to pass through this part of the space, and avoids excessive drying in the drum 1, which affects the quality of the materials. When the material humidity is high, the staff increases the number of The extended distance of the first telescopic rod 31, the second telescopic rod 32 and the third telescopic rod 33 increases the space between the adjacent blocking parts 4, thereby increasing the area where the temperature is concentrated inside the drum 1 and increasing the humidity. The time it takes for higher materials to pass through this part of the space increases, thereby enhancing the drying effect on the materials. When drum 1 dries materials with relatively high humidity, there is no need to reduce the speed of drum 1 to enhance the drying effect on the materials. Therefore, it is avoided that the rotating speed of the drum 1 is reduced, which reduces the stir-frying effect of the lifting plate 13 on the material, causing the material to accumulate in the drum 1, affecting the drying effect of the material, and causing the material to be incompletely dried;

When the pneumatic telescopic rod 3 is extended to the limit state, the top end of the third telescopic rod 33 is still inside the drum 1. At this time, the distance between the adjacent blocking parts 4 reaches the maximum, and the blocking parts 4 and the inner wall of the drum 1 form a The relatively independent space is also maximized, and the drying effect on materials is also maximized;

When the materials are completely dried and leave the drum 1, the external air pump stops delivering high-temperature dry gas to the auxiliary baffle bag 42 through the hose. The baffle component 4 gradually shrinks to its original state, and the pneumatic telescopic rod 3 also gradually shrinks back to its original state. In the original state, the first servo motor 21 stops working, the rotation speed of the driving gear 22 gradually decreases, and the drum 1 also gradually decelerates and finally stops rotating;

During this process, due to the flipping of the lifting plate 13, part of the material collides with the baffle part 4 filled with high-temperature dry gas, so that the temperature of the baffle part 4 can be transmitted to the material, thereby enhancing the drying effect on the material. , at the same time, a relatively closed space is formed between the inflated baffle part 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 flipping of the lifting plate 13 , and at the same time, by controlling the elongation or shortening of the pneumatic telescopic rod 3 in the drum 1, the distance between the blocking parts 4 is controlled to increase or decrease, thereby controlling the increase or decrease of this relatively closed space, so that the humidity Larger materials can still obtain the best drying effect without reducing the rotation speed of drum 1, thereby avoiding the turning range of the material due to the reduction of the rotation speed of the copy plate 13 when the drum 1 rotates at a low speed. Reduced, the material is not in full contact with the inner wall of the drum 1, resulting in a reduction in the stir-frying effect of the copying plate 13 on the material. At the same time, it also avoids the reduction in the transmission speed of the material in the drum 1 due to the reduction in the speed of the copying plate 13, causing the material to be in the drum 1, resulting in incomplete drying of the material.

In a specific embodiment, the communication pipe 44 is a telescopic hose;

Since the communication tube 44 is a telescopic tube, when the pneumatic telescopic rod 3 is extended or shortened and moves inside the drum 1 , the communication tube 44 will be elongated or contracted, thus preventing the communication tube 44 from falling off.

Specifically, the cross-sections of the main baffle bag 41 and the auxiliary baffle bag 42 are round arches;

When the materials are lifted up and stir-fried by the lifting plate 13, part of the materials will collide with the main baffle bag 41, the auxiliary baffle bag 42 and the air guide tube 43. The collision area with the turning materials increases, making it easier to disperse the materials that are bonded together due to the greater humidity. After the dispersed materials fall back to the inner wall of the drum 1, they have more full contact with the inner wall of the drum 1. , thereby enhancing the drying effect of the drum 1 on materials with high humidity. At the same time, the larger contact area between the main baffle bag 41 and the auxiliary baffle bag 42 and the material also enables the main baffle bag 41 and the auxiliary baffle bag 42 to dry the material. More heat is transferred to the material, thereby enhancing the drying effect of the material.

Specifically, the main baffle bag 41 and the auxiliary baffle bag 42 are made of fluorine rubber;

The main baffle bag 41 and the auxiliary baffle bag 42 made of fluororubber have excellent heat resistance, which can prevent the main baffle bag 41 and the auxiliary baffle bag 42 from being damaged by heat in a high temperature environment.

Specifically, the placing plate 24 is provided with chute 241; two symmetrically arranged slide blocks 26 are fixedly installed at the bottom of the first mounting platform 25; both slide blocks 26 slide on adjacent slide blocks. In slot 241;

Since the first installation platform 25 is fixedly connected to the slider 26, the first installation platform 25 can slide along the chute 241 on the placement plate 24. Therefore, when the rolling dryer dries materials with very low humidity, it only relies on heating. When the drum 1 has finished drying the material, the staff can push the first mounting platform 25 along the chute 241 on the placement plate 24 and away from the drum by adjusting the pneumatic telescopic rod 3 to the initial state. Slide in the direction of 1 to completely withdraw the pneumatic telescopic rod 3 from the drum 1. At this time, the drum 1 becomes an ordinary drum dryer, which can dry materials with low humidity without the need to prepare ordinary drum dryers. machine, which saves production costs, or when the equipment needs to be maintained and inspected, the staff can withdraw the pneumatic telescopic rod 3 and the stopper component 4 from the drum 1 to facilitate the staff to perform daily maintenance and inspection of the machine.

Specifically, the opposite surfaces of the two adjacent main baffle bags 41 are provided with evenly arranged air leakage holes 45, and a filter cloth 46 is fixedly installed on the air leakage holes 45;

When the material moves between two adjacent blocking parts 4, because the lifting plate 13 continues to turn the material, 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 installed The filter cloth 46 can prevent materials from entering the main baffle bag 41 from the air leakage hole 45. At the same time, the high-temperature dry gas in the main baffle bag 41 can also be ejected from the air leakage hole 45, so that the wet materials can be mixed with the ejected material. The high-temperature dry gas is fully contacted to enhance the drying effect on the material. At the same time, the sprayed high-temperature dry gas can also heat the space between the adjacent blocking parts 4, thereby making the temperature of this part of the space more concentrated, and further To enhance the drying effect of the material, since the filter cloth 46 is fixedly installed in the air leakage hole 45, when the material is in powder form, the material can also be prevented from entering the main blocking bag 41.

Specifically, a second installation platform 27 is fixedly installed on the side of the fixed frame 2 close to the discharge port 15; an exhaust fan 28 is fixedly installed on the end of the second installation platform 27 away from the fixed frame 2;

When the material needs to be dried, the staff starts the drum dryer. At this time, the exhaust fan 28 starts to discharge the air in the drum 1 from the discharge port 15;

Specifically, since the moisture of the materials in the drum 1 will evaporate into the air after being dried, the humidity of the air in the drum 1 will become high at this time, which is not conducive to the drying of the materials. Therefore, the exhaust fan 28 can accelerate the discharge of the humid air in the drum 1. Strengthen the flow of air in the drum 1 so that the materials picked up by the copying plate 13 can fully contact with the dry air, thereby enhancing the drying effect on the materials. At the same time, due to the continuous turning of the materials by the copying plate 13 in the drum 1, the materials will rise. The contaminated tiny dust is raised and mixed into the air. At this time, the exhaust fan 28 can expedite the discharge of the air mixed with dust to keep the air in the drum 1 relatively clean;

When the material is in powder form, the exhaust fan 28 is stopped to participate in the drying work to prevent the exhaust fan 28 from discharging the dried powdery material from the drum 1, causing waste.

Specifically, the air guide tube 43 is a bellows;

The air guide tube 43 made of corrugated tubes has a certain degree of elasticity. When the main baffle bag 41 and the auxiliary baffle bag 42 stretch and expand under the action of high-temperature dry gas, the air guide tube 43 will not fall off, and the main baffle bag 42 will not fall off. The baffle bag 41 and the auxiliary baffle bag 42 have a certain supporting effect. At the same time, when the material turned by the copying plate 13 collides with the air guide tube 43, the contact area between the material and the air guide tube 43 is increased, thereby causing adhesion in the air guide tube 43. The materials together are easier to disperse, 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 leak hole 45, thereby enhancing the drying effect on the materials.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. The present invention will also have other aspects without departing from the spirit and scope of the present invention. Various changes and modifications are possible, which fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. A drum dryer comprising a drum (1); a fixing frame (2) is paved at the bottom of the roller (1); the outer ring of the roller (1) is sleeved with a gear ring (11), and the gear ring (11) is fixedly connected with the roller (1) through a support column; the outer ring of the roller (1) is sleeved with two fixing rings (12), and each fixing ring (12) is fixedly connected with the roller (1) through a uniform support column; a plurality of groups of shoveling plates (13) are fixedly arranged on the inner ring of the roller (1), and each group of shoveling plates (13) is uniformly arranged along the circumferential direction of the roller (1); the shoveling plate (13) forms a certain included angle with the circumferential direction of the roller (1); the fixed frame (2) is fixedly provided with a first servo motor (21) at two sides of the roller (1); the output ends of the two first servo motors (21) are fixedly provided with driving gears (22), and the driving gears (22) are meshed with the gear ring (11); support wheels (23) are arranged on the fixing frame (2) at the two sides of the roller (1) and at positions corresponding to the fixing rings (12); the supporting wheels (23) are rotationally connected with the fixing frame (2) and support the roller (1); one end of the roller (1) is provided with a feed inlet (14); a discharge hole (15) is formed in the other end of the roller (1);

the method is characterized in that: two symmetrically arranged placing plates (24) are fixedly arranged on one side of the fixing frame (2) close to the feed inlet (14); a first mounting table (25) is arranged on the placing plate (24); a pneumatic telescopic rod (3) is fixedly arranged on the first mounting table (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 rods of the pneumatic telescopic rod (3) are three-stage telescopic rods, namely a first telescopic rod (31), a second telescopic rod (32) and a third telescopic rod (33); one end of each of the first telescopic rod (31), the second telescopic rod (32) and the third telescopic rod (33) is sleeved with a material blocking part (4); the material blocking component (4) comprises a main material blocking bag (41) and an auxiliary material blocking bag (42); one of the auxiliary material blocking bags (42) is communicated with an external air pump through a hose; the outer rings of the first telescopic rod (31), the second telescopic rod (32) and the third telescopic rod (33) are fixedly connected with auxiliary blocking material bags (42); an air duct (43) which is uniformly arranged is arranged on each auxiliary blocking material bag (42); the other end of the air duct (43) on each auxiliary blocking material bag (42) is fixedly connected with a main blocking material bag (41) together, and the main blocking material bags (41) and the auxiliary blocking material bags (42) are communicated through the air duct (43); and communicating pipes (44) which are uniformly arranged are fixedly arranged on the two adjacent auxiliary blocking material bags (42), and the two adjacent auxiliary blocking material bags (42) are communicated through the communicating pipes (44).

2. A drum dryer as claimed in claim 1, characterized in that: the communicating pipe (44) is a telescopic hose.

3. A drum dryer as claimed in claim 2, characterized in that: the sections of the main blocking material bag (41) and the auxiliary blocking material bag (42) are circular arches.

4. A drum dryer as claimed in claim 3, characterized in that: the main material blocking bag (41) and the auxiliary material blocking bag (42) are made of fluororubber.

5. A drum dryer as claimed in claim 1, characterized in that: the placing plates (24) are provided with sliding grooves (241); two symmetrically arranged sliding blocks (26) are fixedly arranged at the bottom of the first mounting table (25); both the sliding blocks (26) slide in the adjacent sliding grooves (241).

6. A drum dryer as claimed in claim 5, wherein: air leakage holes (45) which are uniformly distributed are formed in the surfaces, opposite to the main material blocking bags (41), of every two adjacent main material blocking bags, and filter cloth (46) is fixedly arranged on each air leakage hole (45).

7. A drum dryer as claimed in claim 1, characterized in that: a second mounting table (27) is fixedly mounted on one side, close to the discharge hole (15), of the fixing frame (2); and an exhaust fan (28) is fixedly arranged at one end, far away from the fixed frame (2), of the second mounting table (27).

8. A drum dryer as claimed in claim 1, characterized in that: the air duct (43) is a corrugated pipe.