An anti-sticking roller for zoned heating of asphalt recycled materials

Abstract

The present invention discloses an anti-sticking roller for heating asphalt recycled materials in different zones, belonging to the technical field of asphalt equipment, comprising a cylinder, one end of which is provided with a feed end, and the other end of which is provided with a discharge end. The cylinder is divided into a guide blade area and a lifting blade area from the feed end to the discharge end. The end of the cylinder provided with the discharge end is connected to the high-temperature gas outlet of the combustion furnace. An air inlet pipe is fixedly installed in the cylinder, one end of the air inlet pipe is connected to the high-temperature gas outlet of the combustion furnace, and the other end is fixedly connected to the air outlet pipe. The air outlet pipe has an air outlet, and the air outlet blows air toward the other end of the lifting blade area away from the combustion furnace or toward the inner wall of the guide blade area. The present invention adds an air inlet pipe in the anti-sticking roller to guide the high-temperature gas from the furnace into the deep part of the cylinder, and blows it directly from the air outlet pipe to the inner wall of the other end of the lifting blade area away from the combustion furnace or the inner wall of the guide blade area, thereby increasing the temperature of this area, reducing the adhesion of recycled materials, or removing the recycled materials that have already adhered.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt production equipment, and more specifically to an anti-sticking roller for heating asphalt recycled materials in different zones. Background Art

[0002] The regeneration drying drum is a core component in the heating process of recycled asphalt mixture (RAP). It not only ensures that the heated recycled material reaches a certain temperature, but also prevents localized overheating that could cause further asphalt aging on the surface of the old asphalt mixture. Existing regeneration drying drums primarily consist of a drum with a feed port at one end and a discharge port at the other. From the feed port to the discharge port, the drum is divided into a material guide blade area and a material lift blade area.

[0003] During use, recycled aggregate often sticks to the drum. To overcome this problem, the applicant has disclosed a non-sticking recycled aggregate drying drum in Chinese Utility Model Patent No. CN 217733668U. This patent primarily utilizes a front-sparse, rear-dense structure in the first and second feeding chain zones, allowing the recycled aggregate to quickly enter the second feeding chain zone. This allows for rapid feeding at the feed end and avoids the problem of only a small amount of aggregate entering at the beginning of feeding, which can cause excessive heating and lead to sticking.

[0004] However, regardless of the arrangement of the feed vanes in the regeneration drying drum, the high-temperature gases from the combustion chamber cool down after exchanging heat with the regenerated material within the drum. This low-temperature gas creates a low-temperature zone within the drum. This zone typically occurs at the end of the feed vanes away from the combustion chamber and in the material guide vanes. Once the regenerated material adheres and hardens in this low-temperature zone, it becomes difficult to melt and release. Over time, this adhesion increases, affecting the efficiency of the feed vanes and resulting in low material temperature and high exhaust gas temperature. Summary of the Invention

[0005] The present invention provides an anti-sticking roller for zoned heating of asphalt recycled material. Its main purpose is to overcome the problem that a low-temperature section is generated in the drying cylinder after the existing high-temperature gas and recycled material undergo heat exchange, causing the recycled material to adhere and harden in the low-temperature section, affecting the material lifting effect, and resulting in low material temperature and high exhaust gas temperature.

[0006] The present invention adopts the following technical solutions:

[0007] A non-sticking roller for zoned heating of asphalt recycled material comprises a cylinder, one end of the cylinder is provided with a feed end, and the other end is provided with a discharge end, the cylinder is divided into a material guide blade area and a material lifting blade area from the feed end to the discharge end, the end of the cylinder provided with the discharge end is connected to the high-temperature gas outlet of the combustion furnace, an air inlet pipe is fixedly installed in the cylinder, one end of the air inlet pipe is communicated with the high-temperature gas outlet of the combustion furnace, and the other end is fixedly connected to an air outlet pipe; the air outlet pipe has an air outlet, and the air outlet blows air toward the inner wall of the other end of the material lifting blade area away from the combustion furnace, or blows air toward the inner wall of the material guide blade area.

[0008] In a preferred embodiment, the above-mentioned air intake pipe is composed of an air intake cone, an adjusting damper, a straight pipe and a flange. The large-diameter end of the air intake cone is arranged at the high-temperature gas outlet of the combustion furnace, and the small-diameter end of the air intake cone is connected to the straight pipe. The adjusting damper is provided at the connection between the small-diameter end of the air intake cone and the straight pipe, and the other end of the straight pipe is provided with the flange.

[0009] In a preferred embodiment, the above-mentioned air outlet pipe is composed of flange 2, a surrounding plate and a baffle. The flange 2 and the baffle are spaced apart. Several surrounding plates are connected between the flange 2 and the baffle. The surrounding plates are spaced apart along the inner circumferential surface of the flange 2, and the gap between each adjacent two surrounding plates constitutes the air outlet.

[0010] Furthermore, one or more extension pipes are connected between the air inlet pipe and the air outlet pipe, and each of the extension pipes is provided with a third flange at the front end and a fourth flange at the rear end.

[0011] When there is one extension pipe, the flange three is connected to the flange one by bolts, and the flange four is connected to the flange two by bolts.

[0012] When there are multiple extension pipes, flange three of the first extension pipe is connected to flange one by bolts, flange four of the previous extension pipe is connected to flange three of the next extension pipe, and flange four of the last extension pipe is connected to flange two by bolts.

[0013] In a preferred embodiment, the air inlet pipe and the extension pipe are both fixed to the lifting blade ring of the lifting blade area through a support.

[0014] In a preferred embodiment, the air inlet pipe and the extension pipe are both extended along the axis of the cylinder.

[0015] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention incorporates an air inlet pipe within the cylinder of the anti-sticking roller. One end of the air inlet pipe communicates with the high-temperature gas outlet of the combustion furnace, and the other end is fixedly connected to an air outlet pipe. The air inlet pipe directs the high-temperature gas from the furnace into the depths of the cylinder. The high-temperature gas is then blown directly from the air outlet pipe toward the inner wall of the material-lifting blade area, away from the combustion furnace, or toward the inner wall of the material-guiding blade area. In other words, it is blown toward the drum wall where the regrind adheres, raising the temperature in this area, reducing the adhesion of the regrind or removing any already adhered regrind, and preventing the regrind from hardening in this area and affecting the subsequent lifting effect.

[0017] 2. The present invention further provides an extension pipe between the air inlet pipe and the air outlet pipe. By changing the number of the extension pipes, the area corresponding to the air outlet of the air outlet pipe can be changed to accurately reduce or prevent the adhesion of the recycled material.

[0018] 3. The present invention can be applied to the heating of RAP in asphalt mixture plant hot regeneration mixing equipment or asphalt mixture mixing equipment or heating of individual sand and gravel. It can also be applied to the drying and heating of additive sand and gravel mixtures formed by adding additives with low ignition point and easy adhesion to the sand and gravel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a cross-sectional view of the present invention.

[0021] Figure 3 Schematic diagram of the structure of the air intake pipe of the present invention.

[0022] Figure 4 Schematic diagram of the structure of the air outlet pipe of the present invention.

[0023] Figure 5 Schematic diagram of the structure of the extension tube of the present invention. DETAILED DESCRIPTION

[0024] The following describes specific embodiments of the present invention with reference to the accompanying drawings. Numerous details are provided below to provide a comprehensive understanding of the present invention, but those skilled in the art will appreciate that the present invention can be practiced without these details. Well-known components, methods, and processes are not described in detail below.

[0025] This embodiment provides an anti-sticking roller for heating asphalt recycled materials in different zones. Figure 1 and Figure 2The anti-sticking drum of this embodiment is actually a countercurrent heating and drying drum.

[0026] Reference Figure 1 and Figure 2 An air inlet pipe 30 is fixedly installed in the above-mentioned cylinder 10, one end of the air inlet pipe 30 is connected to the high-temperature gas outlet 201 of the combustion furnace 20, and the other end is fixedly connected to an air outlet pipe 40; the air outlet pipe 40 has an air outlet 401, and the air outlet blows air toward the inner wall of the other end of the material lifting blade area 12 away from the combustion furnace, or blows air toward the inner wall of the material guide blade area 11.

[0027] Reference Figure 1 The above-mentioned lifting blade area 12 is provided with a plurality of lifting blade fixing rings 121 for fixing the lifting blades. The above-mentioned air inlet pipe 30 is extended along the axis of the cylinder 10 and is fixed to the lifting blade fixing ring through a support member 301. Figure 3 The air intake pipe 30 is composed of an air intake cone 31, an adjusting damper 32, a straight pipe 33 and a flange 34. The large-diameter end of the air intake cone 31 is arranged at the high-temperature gas outlet 201 of the combustion furnace 20, and the small-diameter end of the air intake cone 31 is connected to the straight pipe 33. The adjusting damper 32 is provided at the connection between the small-diameter end of the air intake cone 31 and the straight pipe 33, and the other end of the straight pipe 33 is provided with the flange 34.

[0028] Reference Figure 1 and Figure 4 The outlet pipe 40 is composed of a second flange 41, a panel 42, and a baffle 43. The second flange 41 and the baffle 43 are spaced apart, and a plurality of panels 42 are connected between the second flange 41 and the baffle 43. The panels 42 are spaced apart along the inner circumference of the second flange 41, and the gap between each two adjacent panels 42 forms the outlet 401. When the high-temperature gas is transported from the inlet pipe to the end of the outlet pipe, it is blocked by the baffle and blown out through the gap between the panels (i.e., the outlet), and then toward the inner wall of the cylinder.

[0029] Reference Figure 1 and Figure 5One or more extension tubes 50 are connected between the air inlet pipe 30 and the air outlet pipe 40. The extension tubes 50 are fixed to the material lifting blade fixing ring via a second support member 501. Each extension tube 50 has a third flange 51 at the front end and a fourth flange 52 at the rear end. This embodiment shows three extension tubes 50. The third flange 51 of the first extension tube is bolted to the first flange 34. The fourth flange 52 of the preceding extension tube is connected to the third flange 51 of the following extension tube. The fourth flange 52 of the last extension tube is bolted to the second flange 41. Because three extension tubes 50 are added between the air inlet pipe 30 and the air outlet pipe 40 in this embodiment, the air outlet 401 of the air outlet pipe 40 blows air toward the inner wall of the material guiding blade area 11.

[0030] Of course, in other embodiments, the number of extension tubes may be increased or decreased according to actual use needs to change the area corresponding to the outlet of the outlet pipe, so as to accurately reduce or prevent the adhesion of the recycled material.

[0031] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A non-sticking drum for heating asphalt recycled materials in different zones, comprising a cylinder, one end of which is provided with a feed end, and the other end of which is provided with a discharge end. The cylinder is sequentially divided into a material guide blade area and a material lifting blade area from the feed end to the discharge end. The end of the cylinder provided with the discharge end is connected to the high-temperature gas outlet of the combustion furnace, characterized in that: An air intake pipe is fixedly installed in the cylinder, one end of the air intake pipe is communicated with the high-temperature gas outlet of the combustion furnace, and the other end is fixedly connected to an outlet pipe; the outlet pipe has an outlet, and the outlet blows air toward the inner wall of the other end of the material lifting blade area away from the combustion furnace, or blows air toward the inner wall of the material guide blade area; the air intake pipe is composed of an air intake cone, an adjusting damper, a straight pipe and a flange 1, the large-diameter end of the air intake cone is arranged at the high-temperature gas outlet of the combustion furnace, the small-diameter end of the air intake cone is connected to the straight pipe, the adjusting damper is provided at the connection between the small-diameter end of the air intake cone and the straight pipe, and the other end of the straight pipe is provided with the flange 1; the outlet pipe is composed of a flange 2, a surrounding plate and a baffle, the flange 2 is spaced apart from the baffle, and a plurality of the surrounding plates are connected between the flange 2 and the baffle, the surrounding plates are arranged at intervals along the inner circumferential surface of the flange 2, and the gap between each adjacent two surrounding plates constitutes the air outlet.

2. The anti-sticking roller for zoned heating of asphalt recycled materials according to claim 1, characterized in that: One or more extension pipes are connected between the air inlet pipe and the air outlet pipe. The front end of each extension pipe is provided with a flange three, and the rear end is provided with a flange four.

3. The anti-sticking roller for zoned heating of asphalt recycled materials according to claim 2, characterized in that: There is one extension pipe, the third flange is connected to the first flange by bolts, and the fourth flange is connected to the second flange by bolts.

4. The anti-sticking roller for zoned heating of asphalt recycled materials according to claim 2, characterized in that: There are several extension pipes, flange three of the first extension pipe is connected to flange one by bolts, flange four of the previous extension pipe is connected to flange three of the next extension pipe, and flange four of the last extension pipe is connected to flange two by bolts.

5. The anti-sticking roller for zoned heating of asphalt recycled materials according to any one of claims 2 to 4, characterized in that: The air inlet pipe and the extension pipe are both fixed on the material lifting blade ring in the material lifting blade area through a support member.

6. The anti-sticking roller for zoned heating of asphalt recycled materials according to any one of claims 2 to 4, characterized in that: The air inlet pipe and the extension pipe are both extended along the axis of the cylinder.

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