Direct-fired asphalt concrete aggregate preheating apparatus

Abstract

The utility model relates to a kind of stone preheating equipment, specifically a direct-fired asphalt concrete stone preheating equipment, including support frame;Further include the preheating pipeline of oblique arrangement;Two ends of the preheating pipeline are respectively rotationally installed with inlet pipe and discharge pipe;And the discharge pipe is fixedly installed with burner at the end away from the inlet pipe;Walk material piece, including the multiple groups of vane rotationally installed in the preheating pipeline, the preheating pipeline can drive the synchronous rotation of the vane;Further include throwing piece, the throwing piece can drive the vane rotation in the vane rotation process, to change its with the included angle of the preheating pipeline axis, can expand the throwing area of material curtain, to further increase the contact area of material curtain and flame;And the rotating vane can reduce the rate of stone moving to discharge pipe direction (so that the speed of stone passing through preheating pipeline slows down), to improve the contact time of stone and flame, can improve preheating effect.

Description

Technical Field

[0001] This utility model relates to a stone preheating device, specifically a direct-fired asphalt concrete stone preheating device. Background Technology

[0002] In the production of asphalt concrete, preheating the aggregates (stone) is a crucial step, as its uniformity and efficiency directly affect the quality of the final mixture and energy consumption. Currently, drum-type drying and heating equipment is the mainstream technology in the industry.

[0003] Common drum-type drying and preheating equipment includes an inclined drum with multiple sets of blades fixedly installed inside; and a burner is fixedly installed at the discharge end of the drum. During the preheating process, the inclined drum rotates under the drive of the drive device. The blades on the inner wall of the drum lift the stone to a certain height during the rotation of the drum, and then let it fall freely, forming a "material curtain" to increase the contact area between the stone and the high-temperature flue gas (the high-temperature flame generated by the burner), thereby achieving the purpose of heating.

[0004] In common drum-type drying and preheating equipment, the blades are mostly arranged parallel to the drum axis. This arrangement effectively ensures the amount of stone shoveled by the blades during rotation (effectively reducing the amount of falling back), thus ensuring production efficiency. However, the trajectory of the stone thrown by parallel blades is relatively concentrated, resulting in a narrower and thinner material curtain, which limits the overall cross-sectional area in contact with the high-temperature flue gas. This leads to uneven heating of the stone in the core and edge areas of the material curtain, easily causing local overheating or underheating, affecting the final mixing quality of the asphalt concrete. Utility Model Content

[0005] The purpose of this invention is to provide a direct-fired asphalt concrete aggregate preheating device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A direct-fired asphalt concrete aggregate preheating device, including a support frame;

[0008] It also includes an inclined preheating pipe; at both ends of the preheating pipe are respectively rotatably installed a feed pipe and a discharge pipe that are fixedly connected to the support frame; and a burner is fixedly installed at the end of the discharge pipe away from the feed pipe.

[0009] The feeding component includes multiple sets of blades rotatably installed inside the preheating pipe, and the preheating pipe can drive the blades to rotate synchronously.

[0010] It also includes a spreading component, which can drive the blade to rotate during the rotation of the blade, so as to change the angle between the blade and the axis of the preheating pipe.

[0011] The direct-fired asphalt concrete aggregate preheating equipment described above includes: the material feeding component further includes a motor fixedly installed on the support frame, and a small gear fixedly installed on the output end of the motor; a large gear meshing with the small gear is fixedly installed on the preheating pipe.

[0012] The direct-fired asphalt concrete aggregate preheating equipment described above includes: a scattering component comprising a drive gear fixedly mounted on the blades; multiple sets of fixing plates fixedly mounted on the preheating pipe; a guide groove provided on the fixing plate; a spring and a rack plate meshing with the drive gear provided on the fixing plate; a slider fixedly mounted on the rack plate that slides in cooperation with the guide groove; and the two ends of the spring respectively contacting the fixing plate and the slider.

[0013] The direct-fired asphalt concrete aggregate preheating equipment described above includes: the scattering component further includes an abutment plate fixedly installed on the support frame; a wedge block that abuts and engages with the abutment plate is fixedly installed on the rack plate.

[0014] The direct-fired asphalt concrete aggregate preheating equipment described above includes: a mounting base fixedly installed inside the preheating pipe and rotatably connected to the blades; a limiting groove is provided on the mounting base; a sliding column is fixedly installed on the blades and slidably engages with the limiting groove; and a baffle is fixedly installed on the blades to cover the limiting groove.

[0015] The direct-fired asphalt concrete aggregate preheating equipment described above has an inclined plate fixedly installed at the top of the blades.

[0016] As described above, the direct-fired asphalt concrete aggregate preheating equipment has blades and inclined plates made of alloy steel.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: during the upward rotation of the blades, the blades are driven to rotate by the scattering component, and the direction of rotation is towards the feed pipe, which increases the angle between the blades and the axis of the preheating pipe, thereby expanding the scattering area of ​​the material curtain and further increasing the contact area between the material curtain and the flame; and the rotating blades can reduce the speed at which the stone moves towards the discharge pipe (making the speed at which the stone passes through the preheating pipe slower), thereby increasing the contact time between the stone and the flame and improving the preheating effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a direct-fired asphalt concrete aggregate preheating equipment.

[0019] Figure 2 This is a structural schematic diagram of a direct-fired asphalt concrete aggregate preheating equipment from another perspective.

[0020] Figure 3 This is a schematic diagram of the preheating pipe structure in a direct-fired asphalt concrete aggregate preheating equipment.

[0021] Figure 4 for Figure 3 A structural diagram from another perspective.

[0022] Figure 5 for Figure 4 A schematic diagram of the structure at point A in the middle.

[0023] Figure 6 This is a schematic diagram of the blade structure in a direct-fired asphalt concrete aggregate preheating device.

[0024] In the diagram: 1. Supporting frame;

[0025] 2. Feed pipe;

[0026] 3. Discharge pipe;

[0027] 4. Burner;

[0028] 5. Preheating pipe; 501. Large gear; 502. Fixing plate; 503. Guide groove;

[0029] 6. Install the base; 601. Limiting slide groove;

[0030] 7. Blade; 701. Inclined plate; 702. Sliding column; 703. Baffle;

[0031] 8. Drive gear;

[0032] 9. Wedge block;

[0033] 10. Rack plate; 1001. Slider;

[0034] 11. Spring;

[0035] 12. Contact plate;

[0036] 13. Motor; 1301. Pinion. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0038] Please see Figures 1-6As an embodiment of the present utility model, the direct-fired asphalt concrete aggregate preheating equipment includes a support frame 1;

[0039] It also includes a preheating pipe 5 that is inclined; at both ends of the preheating pipe 5, there are respectively a feed pipe 2 and a discharge pipe 3 that are fixedly connected to the support frame 1; and a burner 4 is fixedly installed at the end of the discharge pipe 3 that is away from the feed pipe 2.

[0040] The feeding component includes multiple sets of blades 7 rotatably installed inside the preheating pipe 5, and the preheating pipe 5 can drive the blades 7 to rotate synchronously.

[0041] It also includes a spreading component, which can drive the blade 7 to rotate during the rotation of the blade 7, so as to change the angle between the blade 7 and the axis of the preheating pipe 5.

[0042] In this embodiment, asphalt concrete aggregate is fed into the feed pipe 2 by a material conveying device; the inclined preheating pipe 5 allows the aggregate to move from the feed pipe 2 to the discharge pipe 3; and during the movement, the high-temperature flame generated by the burner 4 can heat the aggregate in the preheating pipe 5, so that the temperature of the aggregate discharged from the discharge pipe 3 meets the requirements for subsequent use.

[0043] Furthermore, as the stone moves within the preheating pipe 5, the material feeder drives the preheating pipe 5 to rotate, thereby causing the blades 7 to rotate synchronously. The rotating blades 7 can shovel the stone to the top of the preheating pipe 5. When the stone is about to reach the top position, it is released to form a material curtain, so that the stone can come into good contact with the flame, thereby improving the preheating effect and avoiding uneven preheating and reducing the quality of asphalt concrete.

[0044] Furthermore, during the upward rotation of blade 7, the scattering component drives blade 7 to rotate, and its rotation direction is towards the feed pipe 2, which increases the angle between blade 7 and the axis of preheating pipe 5, thereby expanding the scattering area of ​​the material curtain and further increasing the contact area between the material curtain and the flame; and the rotating blade 7 can reduce the speed at which the stone moves towards the discharge pipe 3 (making the speed at which the stone passes through the preheating pipe 5 slower), thereby increasing the contact time between the stone and the flame and improving the preheating effect.

[0045] As a further embodiment of this utility model, the feeding component also includes a motor 13 fixedly installed on the support frame 1, and a small gear 1301 fixedly installed on the output end of the motor 13; a large gear 501 meshing with the small gear 1301 is fixedly installed on the preheating pipe 5.

[0046] In this embodiment, when the motor 13 rotates, it can drive the small gear 1301 to rotate, thereby driving the large gear 501 to rotate through meshing, which in turn drives the preheating pipe 5 to rotate.

[0047] The rotating preheating pipe 5 drives the blades 7 to rotate synchronously. When the blades 7 rotate upward from the side of the preheating pipe 5 that is close to the support frame 1, they can scoop the moving stones upward. When the blades 7 rotate to the side away from the support frame 1, the stones will fall under the action of gravity. During the fall, the stones come into contact with the flame, causing their temperature to rise (that is, when they are about to reach the top position, the stones are released to form a material curtain, so that the stones can come into good contact with the flame, thereby improving the preheating effect and avoiding uneven preheating and reducing the quality of asphalt concrete).

[0048] As a further embodiment of this utility model, the scattering component includes a drive gear 8 fixedly mounted on the blade 7; multiple sets of fixing plates 502 are fixedly mounted on the preheating pipe 5; a guide groove 503 is provided on the fixing plate 502; a spring 11 and a rack plate 10 meshing with the drive gear 8 are provided on the fixing plate 502; a slider 1001 that slides in cooperation with the guide groove 503 is fixedly mounted on the rack plate 10; and the two ends of the spring 11 respectively abut against the fixing plate 502 and the slider 1001.

[0049] As a further embodiment of this utility model, the scattering component also includes an abutment plate 12 fixedly installed on the support frame 1; a wedge block 9 that abuts and cooperates with the abutment plate 12 is fixedly installed on the rack plate 10.

[0050] In this embodiment, as the blade 7 rotates upward, the wedge 9 rotates synchronously. During this rotation, the wedge 9 contacts the contact plate 12 (the inclined surface of the wedge 9 contacts the contact plate 12). Through the squeezing action of the contact plate 12 on the wedge 9, the wedge 9 can be moved away from the contact plate 12, thereby driving the rack plate 10 to move synchronously. During the movement of the rack plate 10, the slider 1001 can slide in the guide groove 503 and compress the spring 11. At the same time, the rack plate 10 drives the drive gear 8 to rotate through the meshing action, thereby driving the blade 7 to rotate.

[0051] In the initial state, the blade 7 is parallel to the axis of the preheating pipe 5. Therefore, during its upward rotation, it can increase the amount of stone being shoveled. As the blade 7 rotates upward, the angle between the blade 7 and the axis of the preheating pipe 5 increases, which increases the area of ​​the material curtain formed by the stone scattering. This increases the contact area of ​​the material curtain. Furthermore, the rotating blade 7 can reduce the speed at which the stone moves towards the discharge pipe 3 (making the speed at which the stone passes through the preheating pipe 5 slower), thereby increasing the contact time between the stone and the flame and improving the preheating effect.

[0052] When the wedge 9 passes the contact plate 12, the elastic force of the spring 11 can drive the rack plate 10 to reset, thereby driving the wedge 9 and the blade 7 to reset.

[0053] As a further embodiment of this utility model, a mounting base 6 is fixedly installed inside the preheating pipe 5 and rotatably connected to the blade 7. A limiting groove 601 is provided on the mounting base 6. A sliding column 702 that slides in cooperation with the limiting groove 601 is fixedly installed on the blade 7, and a baffle 703 that covers the limiting groove 601 is fixedly installed on the blade 7.

[0054] In this embodiment, the mounting base 6 is used to reduce the resistance to the rotation of the blades 7 and can also reduce the wear of the preheating pipe 5, thereby improving the service life of the equipment.

[0055] When the blade 7 rotates, it will drive the sliding column 702 to slide in the limiting groove 601. The limiting groove 601 limits the sliding column 702, which can prevent the blade 7 from being misaligned under the impact of stone and the vibration of the equipment. Furthermore, by covering the limiting groove 601 with the baffle 703, small stone particles can be prevented from falling into the limiting groove 601 and causing the blade 7 to be obstructed from rotating, thereby improving the stability of the equipment.

[0056] As a further embodiment of this utility model, an inclined plate 701 is fixedly installed at the top of the blade 7.

[0057] In this embodiment, the addition of the inclined plate 701 can effectively increase the amount of stone shoveled during the upward rotation of the blade 7, thereby improving production efficiency; and can also compensate for the bending deformation of the blade 7 under the impact of the stone, ensuring effective production.

[0058] As a further embodiment of this utility model, both the blade 7 and the inclined plate 701 are made of alloy steel.

[0059] In this embodiment, the alloy steel blades 7 and the inclined plate 701 have high mechanical strength and wear resistance, which can effectively reduce the wear of the equipment, thereby reducing the maintenance frequency and indirectly improving the production efficiency of the equipment.

[0060] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. A direct-fired asphalt concrete aggregate preheating device, comprising a support frame (1); Its features are, It also includes a preheating pipe (5) that is inclined; at both ends of the preheating pipe (5) are a feed pipe (2) and a discharge pipe (3) that are fixedly connected to the support frame (1); and a burner (4) is fixedly installed at the end of the discharge pipe (3) that is away from the feed pipe (2). The feeding component includes multiple sets of blades (7) rotatably installed inside the preheating pipe (5), and the preheating pipe (5) can drive the blades (7) to rotate synchronously; It also includes a scattering component, which can drive the blade (7) to rotate during the rotation of the blade (7) so as to change the angle between the blade (7) and the axis of the preheating pipe (5).

2. The direct-fired asphalt concrete aggregate preheating equipment according to claim 1, characterized in that, The feeding component also includes a motor (13) fixedly installed on the support frame (1), and a small gear (1301) is fixedly installed on the output end of the motor (13); a large gear (501) that meshes with the small gear (1301) is fixedly installed on the preheating pipe (5).

3. The direct-fired asphalt concrete aggregate preheating equipment according to claim 1, characterized in that, The scattering component includes a drive gear (8) fixedly mounted on the blade (7); multiple sets of fixing plates (502) are fixedly mounted on the preheating pipe (5); a guide groove (503) is provided on the fixing plate (502); a spring (11) and a rack plate (10) meshing with the drive gear (8) are provided on the fixing plate (502); a slider (1001) that slides in cooperation with the guide groove (503) is fixedly mounted on the rack plate (10); the two ends of the spring (11) abut against the fixing plate (502) and the slider (1001) respectively.

4. The direct-fired asphalt concrete aggregate preheating equipment according to claim 3, characterized in that, The scattering component also includes an abutment plate (12) fixedly installed on the support frame (1); a wedge (9) that abuts against the abutment plate (12) is fixedly installed on the rack plate (10).

5. A direct-fired asphalt concrete aggregate preheating device according to claim 3, characterized in that, The preheating pipe (5) is fixedly installed with a mounting base (6) that is rotatably connected to the blade (7). A limiting groove (601) is provided on the mounting base (6). A sliding column (702) that slides with the limiting groove (601) is fixedly installed on the blade (7), and a baffle (703) that covers the limiting groove (601) is fixedly installed on the blade (7).

6. The direct-fired asphalt concrete aggregate preheating equipment according to claim 5, characterized in that, An inclined plate (701) is fixedly installed at the top of the blade (7).

7. A direct-fired asphalt concrete aggregate preheating device according to claim 6, characterized in that, Both the blade (7) and the inclined plate (701) are made of alloy steel.

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