Bituminous mixture electric heating anti-sticking drying roller

Abstract

The utility model discloses an asphalt mixture electric heating anti-sticking drying roller, which relates to the technical field of asphalt production equipment, and comprises a roller body and an electric heating device arranged on the outer roller wall of the roller body, and the electric heating device comprises a cable, a circular cable slide wire, a cable mounting seat and an electric heating pipe, the two sides of the roller body in the axial direction are each provided with a round cable sliding contact line, each round cable sliding contact line is fixed to a drying roller girder through a cable installation base, a conductive copper bar in each round cable sliding contact line is connected with a cable, and the electric heating pipe is wound around the outer roller wall of the roller body in a coiled mode. And the two ends of the electric heating tube are correspondingly contacted and connected with the conductive copper bars in the circular cable sliding contact lines through contact pieces respectively. A heating pipeline does not need to be additionally arranged, an existing single-layer drying roller is extremely convenient to transform, the transformation cost is low, the problem that materials adhere to the roller wall of the drying roller can be solved, and the cost of the equipment and the manual maintenance cost are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt production equipment, and more specifically, it refers to an electrically heated anti-sticking drying drum for asphalt mixture. Background Technique

[0002] The hot recycling technology of asphalt mixture is a technology for recycling waste asphalt mixture. The drying drum is the core component of the hot recycling technology of asphalt mixture. The internal structure of the drying drum is provided with various types of pusher blades, lifting blades, etc. The purpose is to smoothly lift and scatter the asphalt mixture to form a material curtain, so that the asphalt mixture can fully exchange heat with the hot flue gas as much as possible to achieve the purpose of drying and heating.

[0003] However, the high-temperature gas generated by the regeneration drying and heating system enters the regeneration drying drum, mainly exchanging heat with each layer of material curtain formed at the inner center of the regeneration drying drum. Most of its heat is absorbed by the asphalt mixture (material curtain), while the cylinder wall of the regeneration drying drum is limited in heat absorption, resulting in a relatively low temperature (about 120 °C), which is also the main reason for the easy occurrence of sticking material on the regeneration drying drum.

[0004] In order to solve the problem of sticking material, Chinese Patent No. CN 105040555A discloses an asphalt regeneration drying drum, including a drum body, a drum driving device and a drying burner. The drum driving device is connected to the drum body to drive its rotation. The drying burner is connected to the front end of the drum body for heating the recycled asphalt in the inner drum body. It also includes a cylinder wall heating device, which is connected to the drum body to heat the cylinder wall of the drum body to the temperature at which the asphalt material melts into a liquid state. Although, this patent discloses that the cylinder wall heating device can adopt an electric heating device, the heating channel of the cylinder wall heating device is connected and heated. The heating channel is attached to the outer wall of the drum body, and can be formed by an outer drum and an inner drum. For the existing single-layer drying drum, the cylinder wall heating device of this structure needs to add heating pipes, which is inconvenient to transform and has a high cost. Therefore, we provide an electrically heated anti-sticking drying drum for asphalt mixture. Content of the Utility Model

[0005] The utility model provides an electrically heated anti-sticking drying drum for asphalt mixture, and its main purpose is to overcome the disadvantages of the existing cylinder wall heating device, such as the need to add heating pipes, inconvenient transformation, and high cost.

[0006] The utility model adopts the following technical scheme:

[0007] An electrically heated anti-sticking drying drum for asphalt mixture, comprising a drum body and an electric heating device arranged on the outer cylinder wall of the drum body. The electric heating device includes a cable, a circular cable sliding contact wire, a cable mounting seat and an electric heating tube. One circular cable sliding contact wire is installed on each side of the drum body in the axial direction. Each circular cable sliding contact wire is fixed on the drying drum girder through the cable mounting seat. The conductive copper bar in each circular cable sliding contact wire is connected to one cable. The electric heating tube is spirally wound on the outer cylinder wall of the drum body. The two ends of the electric heating tube are respectively in corresponding contact connection with the conductive copper bar in each circular cable sliding contact wire through a contact piece.

[0008] In a preferred embodiment, the above-mentioned electrically heated anti-sticking drying drum for asphalt mixture further includes a synchronous fixing frame for fixing the contact piece, and the synchronous fixing frame is fixedly welded on the drum body.

[0009] In a preferred embodiment, the above-mentioned electrically heated anti-sticking drying drum for asphalt mixture further includes a plurality of pressing pieces, and the plurality of pressing pieces are spaced and clamped on the electric heating tube, and the bottom of the pressing piece is correspondingly welded on the outer cylinder wall of the drum body.

[0010] In a preferred embodiment, the above-mentioned electrically heated anti-sticking drying drum for asphalt mixture further includes a PLC controller, and the PLC controller is control-connected to the temperature control component of the electric heating tube.

[0011] In a preferred embodiment, a rolling ring is respectively arranged on both sides of the outer cylinder wall of the drum body, and a driving component is correspondingly arranged on each rolling ring; the two circular cable sliding contact wires are correspondingly installed on the outer cylinder wall of the drum body between the two rolling rings.

[0012] As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

[0013] The electrically heated anti-sticking drying drum of this structure includes a cable, a circular cable sliding contact wire, and an electric heating tube. The circular cable sliding contact wire is installed on both sides of the drum body in the axial direction. The electric heating tube is wound around the outer surface of the outer cylinder wall of the drum body. The two ends of the electric heating tube are respectively in corresponding contact connection with the conductive copper bar in the circular cable sliding contact wire through a contact piece, ensuring that the electric heating tube can rotate with the drum body and the electric heating tube can keep in contact and energized with the cable during the rotation process. The electrically heated anti-sticking drying drum of the present invention does not need to add heating pipelines, is extremely convenient for transforming the existing single-layer drying drum, and has a low transformation cost. It can solve the problem of sticky material on the drum wall of the drying drum, and effectively reduce the social cost and manual maintenance cost of the equipment. Brief Description of the Drawings

[0014] Figure 1 It is the front view of the present invention.

[0015] Figure 2 This is a schematic structural view of the electric heating device of the present utility model.

[0016] Figure 3 It is Figure 2 front view.

[0017] Figure 4 This is a cross-sectional view of the circular cable trolley wire of the present utility model. Specific embodiments

[0018] The following describes the specific embodiments of the present utility model with reference to the accompanying drawings. To fully understand the present utility model, many details are described below, but for those skilled in the art, the present utility model can be implemented without these details. For well-known components, methods, and processes, no further detailed description is given below.

[0019] This embodiment provides an electric heating anti-sticking drying drum for asphalt mixture. Referring to Figure 1 , it includes a drum body 10 and an electric heating device 20 provided on the outer cylindrical wall of the drum body. Among them, a ring 11 is provided on each side of the outer cylindrical wall of the drum body 10, and a driving assembly 12 is correspondingly provided on each ring 11. The driving assembly 12 includes a driving idler, a motor, a gearbox, etc. This structure is a conventional technology in the art and will not be specifically described in this embodiment.

[0020] Referring to Figures 1 to 3 , the electric heating device 20 includes a cable 21, a circular cable trolley wire 22, a cable mounting seat 23, and an electric heating tube 24. The electric heating tube 24 is spirally wound around the outer cylindrical wall in the middle of the drum body 10. A circular cable trolley wire 22 is installed on each side in the axial direction of the drum body 10, and the two circular cable trolley wires 22 are respectively arranged on both sides of the electric heating tube 24. The inner diameter of the circular cable trolley wire 22 is larger than the outer diameter of the drum body 10, and each circular cable trolley wire 22 is fixed on the drying drum girder 1 through a cable mounting seat 23 to ensure that the circular cable trolley wire 22 is fixed.

[0021] Referring to Figure 2 , a circular opening groove 220 is opened at the end of the circular cable trolley wire 22 facing the electric heating tube 24. A conductive copper bar 221 is embedded in each circular cable trolley wire 22, and the cable 21 passes through the housing of the circular cable trolley wire 22 and is connected to the conductive copper bar 221. The two ends of the electric heating tube 24 are respectively in contact connection with the conductive copper bars 221 in each circular cable trolley wire 22 through a contact piece 25.

[0022] Referring to Figure 2, a plurality of pressing pieces 241 are clamped at intervals on the electric heating tube 24, and the bottom of the pressing piece 241 is correspondingly welded on the outer cylindrical wall of the drum body 10, so that the electric heating tube 24 is fixedly attached to the outer cylindrical wall of the drum body 10.

[0023] Refer to Figure 2 , the asphalt mixture electric heating anti-sticking drying drum of this embodiment further includes two synchronous fixing frames 251 for fixing the contact piece 25, and the synchronous fixing frames 251 are fixedly welded on the drum body 10.

[0024] When the drum body 10 rotates, the end of the electric heating tube 24, the synchronous fixing frame 251, and the contact piece 241 are relatively stationary and rotate synchronously with the drum body 10, while the circular cable sliding contact wire 22 is stationary, and the contact piece 241 is in contact with the conductive copper bar 221 inside the circular cable sliding contact wire throughout the process to conduct electricity, that is, the electric heating mechanism is energized and heated throughout the process.

[0025] The asphalt mixture electric heating anti-sticking drying drum of the present invention further includes a PLC controller (not shown in the figure), and the PLC controller is control-connected to the temperature control component of the electric heating tube 24 to control the heating temperature of the electric heating tube.

[0026] The above is only the specific implementation manner of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantive modification made to the present invention using this concept shall fall within the scope of infringement of the protection scope of the present invention.

Claims

1. An electrically heated anti-sticking drying drum for asphalt mixture, comprising a drum body and an electric heating device arranged on the outer cylinder wall of the drum body, characterized in that: The electric heating device includes a cable, a circular cable sliding contact line, a cable mounting seat, and an electric heating tube. One circular cable sliding contact line is installed on each of the two axial sides of the drum body. Each circular cable sliding contact line is fixed on the drying drum girder through the cable mounting seat. The conductive copper bars in each circular cable sliding contact line are connected to one of the cables. The electric heating tube is spirally wound around the outer wall of the drum body, and the two ends of the electric heating tube are respectively in corresponding contact connection with the conductive copper bars in each circular cable sliding contact line through a contact piece.

2. The electrically heated anti-sticking drying drum for asphalt mixture according to claim 1, wherein: It further includes a synchronous fixing frame for fixing the contact piece, and the synchronous fixing frame is fixedly welded on the drum body.

3. The electrically heated anti-sticking drying drum for asphalt mixture according to claim 1, wherein: It further includes a plurality of pressing pieces, and the plurality of pressing pieces are spaced and clamped on the electric heating tube, and the bottom of the pressing piece is correspondingly welded on the outer wall of the drum body.

4. The electrically heated anti-sticking drying drum for asphalt mixture according to claim 1, wherein: It further includes a PLC controller, and the PLC controller is control-connected to the temperature control component of the electric heating tube.

5. An electrically heated anti-sticking drying drum for asphalt mixture according to claim 1, characterized in that: A girth gear is further provided on each of the two sides of the outer wall of the drum body, and a driving assembly is correspondingly provided on each girth gear; the two circular cable sliding contact lines are correspondingly installed on the outer wall of the drum body between the two girth gears.

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