Double-layer convection type aggregate drying cylinder

Abstract

An outer barrel body, a middle barrel body and an inner barrel body are coaxially arranged from outside to inside, the two ends of the outer barrel body, the two ends of the middle barrel body and the two ends of the inner barrel body are installed on two supports respectively, a first drying cavity located on the outer layer and a second drying cavity located on the inner layer are formed, and a material passing opening is formed between the first drying cavity and the second drying cavity. The two rotating discs are rotationally installed in the first drying cavity and the second drying cavity correspondingly, the spiral directions of the outer auger and the inner auger are opposite, the outer auger and the inner auger are located in the first drying cavity and the second drying cavity correspondingly, and the two rotating discs are connected with the outer auger and the inner auger correspondingly. The gear is respectively meshed with the peripheral tooth surfaces of the two turntables through the notches in the outer barrel and the middle barrel; and the gear drives the outer auger and the inner auger to rotate through a motor. According to the aggregate drying cylinder, the double-layer convection type drying principle is adopted, the drying stroke of aggregate is prolonged, the drying effect is improved, the drying time is shortened, meanwhile, excessive heat loss is prevented, and energy is greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying drums, in particular to a double-layer convection aggregate drying drum. Background Art

[0002] Asphalt concrete, also known as asphalt concrete, is a mixture of artificially selected mineral materials, crushed stone, stone chips and mineral powder with a certain graded composition, and a certain proportion of road asphalt materials, mixed under strictly controlled conditions. When preparing asphalt concrete, it is necessary to remove the moisture in the aggregate so that various materials can be better mixed, and the drying drum is one of the commonly used aggregate drying equipment.

[0003] The existing Chinese utility model patent with publication number CN201920631169.5 and titled "A kind of aggregate drying drum" is provided with an adjustable lifting plate to lift the aggregate in the drying drum to improve the drying effect. However, the drying stroke of the aggregate drying drum has only one return stroke. First, the return stroke is short. In order to ensure the drying effect of the aggregate, the forward speed of the aggregate needs to be curbed, and the drying time is slow and long. Second, a single return stroke will waste a lot of heat. Utility Model Content

[0004] The utility model aims to provide a double-layer convection aggregate drying drum to solve the problems of slow drying time and large amount of heat waste in the existing aggregate drying drum.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A double-layer convection aggregate drying cylinder comprises an outer cylinder, an intermediate cylinder, an inner cylinder, an outer auger, an inner auger, a turntable and a gear. The outer cylinder, the intermediate cylinder and the inner cylinder are coaxially arranged from the outside to the inside and the two ends are respectively installed on two supports, forming a first drying chamber located in the outer layer and a second drying chamber located in the inner layer. A material passing port is provided between the first drying chamber and the second drying chamber. The two turntables are rotatably installed in the first drying chamber and the second drying chamber respectively. The spiral directions of the outer auger and the inner auger are arranged in opposite directions and are respectively located in the first drying chamber and the second drying chamber. The two turntables are respectively connected to the outer auger and the inner auger. The gear is meshed with the outer peripheral tooth surfaces of the two turntables through the notches on the outer cylinder and the intermediate cylinder, and the gear drives the outer auger and the inner auger to rotate through a motor.

[0007] A further technical solution is: a burner extending into the inner cylinder is arranged on the support, and the burner is close to the material passing port.

[0008] A further technical solution is: a discharge port for the second drying chamber is arranged on the support, and the discharge port is far away from the feeding port.

[0009] A further technical solution is: a feed pipe is provided on the outer cylinder, and the feed pipe is far away from the feed port.

[0010] A further technical solution is that the rotation speed of the outer auger is lower than the rotation speed of the inner auger.

[0011] A further technical solution is that the number of the feeding port and the discharging port are both multiple and are evenly arranged along a ring.

[0012] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0013] The utility model proposes a double-layer convection aggregate drying drum, which adopts the double-layer convection drying principle. Aggregates flow between a first drying chamber and a second drying chamber, which prolongs the drying stroke of the aggregates and ensures that the aggregates can be dried more effectively. Meanwhile, on the basis of prolonging the drying stroke, the first drying chamber uses the heat emitted by the second drying chamber to preheat the aggregates, thereby increasing the temperature of the aggregates and shortening the time required for drying. At the same time, it prevents excessive heat loss, thereby greatly saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a structural schematic diagram of a double-layer convection aggregate drying drum.

[0015] Figure 2 It is a structural schematic diagram of the intermediate cylinder of the utility model.

[0016] Figure numerals: 1. outer cylinder; 2. middle cylinder; 3. inner cylinder; 4. outer auger; 5. inner auger; 6. turntable; 7. gear; 8. first drying chamber; 9. second drying chamber; 10. feeding port; 11. support; 12. burner; 13. discharge port; 14. feed pipe; 15. notch. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiment 1:

[0024] In this embodiment, Figure 1 and Figure 2As shown, a double-layer convection aggregate drying cylinder comprises an outer cylinder 1, an intermediate cylinder 2, an inner cylinder 3, an outer auger 4, an inner auger 5, a turntable 6 and a gear 7. The outer cylinder 1, the intermediate cylinder 2 and the inner cylinder 3 are coaxially arranged from the outside to the inside and the two ends are respectively installed on two supports 11, and a first drying chamber 8 located in the outer layer and a second drying chamber 9 located in the inner layer are formed. A feeding port 10 is arranged between the first drying chamber 8 and the second drying chamber 9. Two turntables 6 are rotatably installed in the first drying chamber 8 and the second drying chamber 9 respectively. The spiral directions of the outer auger 4 and the inner auger 5 are arranged in opposite directions and are respectively located in the first drying chamber 8 and the second drying chamber 9. The two turntables 6 are respectively connected to the outer auger 4 and the inner auger 5. The gear 7 is respectively meshed with the outer peripheral tooth surfaces of the two turntables 6 through the notches 15 on the outer cylinder 1 and the intermediate cylinder 2. The gear 7 drives the outer auger 4 and the inner auger 5 to rotate through a motor.

[0025] The aggregate drying drum adopts the double-layer convection drying principle. The motor drives the two turntables 6 to rotate through the gear 7, and then drives the outer auger 4 and the inner auger 5 to rotate towards each other in the first drying chamber 8 and the second drying chamber 9 respectively. The aggregate flows between the first drying chamber 8 and the second drying chamber 9, which extends the drying stroke of the aggregate and ensures that the aggregate can be dried more effectively. At the same time, on the basis of extending the drying stroke, the first drying chamber 8 uses the heat emitted by the second drying chamber 9 to preheat the aggregate, increase the aggregate temperature, shorten the drying time, and prevent excessive heat loss, thereby greatly saving energy.

[0026] Preferably, a burner 12 extending into the inner cylinder 3 is provided on the support 11 , and the burner 12 is close to the material passing port 10 .

[0027] Preferably, a discharge port 13 for the second drying chamber 9 is provided on the support 11 , and the discharge port 13 is far away from the material passing port 10 .

[0028] Preferably, a feed pipe 14 is provided on the outer cylinder 1 , and the feed pipe 14 is far away from the feed port 10 .

[0029] Preferably, the rotation speed of the outer auger 4 is lower than the rotation speed of the inner auger 5 .

[0030] The rotation speed of the outer auger 4 is lower than that of the inner auger 5 to ensure that the discharge speed is greater than the feed speed, to prevent the accumulation and blockage of aggregates in the first drying chamber 8 and the second drying chamber 9, thereby affecting the drying effect and circulation; at the same time, it can also ensure that there is less material in the second drying chamber 9, so that a more sufficient drying effect can be obtained.

[0031] Preferably, the number of the material passing openings 10 and the material discharging openings 13 are both multiple and are evenly arranged along a ring.

[0032] The working process of the utility model is as follows: the aggregate enters the first drying chamber 8 from the feed pipe 14 of the outer cylinder 1, and the motor ( Figure 1 The outer auger 4 and the inner auger 5 are driven to rotate and push the aggregate. The aggregate passes through the first drying chamber 8 (the first stroke) under the action of the outer auger 4, and is heated or achieves a certain drying effect with the help of the heat radiated outward from the second drying chamber 9. Then, the aggregate passes through the feeding port 10 and enters the second drying chamber 9. Under the action of the inner auger 5, the aggregate passes through the second drying chamber 9 (the first stroke) and is finally dried directly with the heat generated by the burner 12 in the inner cylinder 3. Finally, the aggregate is discharged from the discharge port 13 on the support 11, and the double-layer convection drying of the aggregate is completed.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer convection aggregate drying drum, Features: The invention comprises an outer cylinder (1), an intermediate cylinder (2), an inner cylinder (3), an outer auger (4), an inner auger (5), a rotating disk (6) and a gear (7); the outer cylinder (1), the intermediate cylinder (2) and the inner cylinder (3) are coaxially arranged from the outside to the inside and both ends are respectively mounted on two supports (11), and a first drying chamber (8) located in the outer layer and a second drying chamber (9) located in the inner layer are formed; a material passing port (10) is provided between the first drying chamber (8) and the second drying chamber (9); the two rotating disks (6) are respectively rotatably mounted on the first drying chamber (8) and the second drying chamber (9); The outer auger (4) and the inner auger (5) are arranged in opposite directions in the first drying chamber (8) and the second drying chamber (9), respectively. The two rotating disks (6) are connected to the outer auger (4) and the inner auger (5), respectively. The gear (7) is meshed with the outer peripheral tooth surfaces of the two rotating disks (6) through the notches (15) on the outer cylinder (1) and the intermediate cylinder (2), respectively. The gear (7) drives the outer auger (4) and the inner auger (5) to rotate through a motor.

2. The double-layer convection aggregate drying drum according to claim 1, Features: The support (11) is provided with a burner (12) extending into the inner cylinder (3), and the burner (12) is close to the material passing port (10).

3. The double-layer convection aggregate drying drum according to claim 1, Features: The support (11) is provided with a discharge port (13) for the second drying chamber (9), and the discharge port (13) is far away from the material passing port (10).

4. The double-layer convection aggregate drying drum according to claim 1, Features: A feed pipe (14) is provided on the outer cylinder (1), and the feed pipe (14) is far away from the feed port (10).

5. The double-layer convection aggregate drying drum according to claim 1, Features: The rotation speed of the outer auger (4) is lower than the rotation speed of the inner auger (5).

6. The double-layer convection aggregate drying drum according to claim 3, Features: The material passing openings (10) and the material discharging openings (13) are both multiple in number and are evenly arranged along a ring.

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