CN220728837U - Concrete aggregate drying device - Google Patents

Abstract

The utility model relates to a concrete aggregate drying device, which comprises a mounting frame, a heater and a drying cylinder, wherein the heater and the drying cylinder are fixed on the mounting frame, the drying cylinder is respectively provided with a feed inlet and a discharge outlet, a rotating shaft with an inner cavity is rotatably arranged in the drying cylinder, a spiral blade with the inner cavity is fixedly connected to the outer wall of the rotating shaft, the rotating shaft is provided with a driving motor for driving the rotating shaft to rotate, the outer wall of the rotating shaft is provided with a heat dissipation hole for communicating the inner cavity of the rotating shaft with the inner cavity of the spiral blade, the outer wall of the drying cylinder is provided with a sealed heating layer, a heating cavity is formed between the heating layer and the drying cylinder, the input end of the heater is communicated with the heating cavity, the output end of the heater is communicated with one end of the inner cavity of the rotating shaft, and the other end of the inner cavity of the rotating shaft is communicated with the heating cavity through a conveying pipe. The inner cavity of the rotating shaft, the inner cavity of the helical blade, the conveying pipe and the heating cavity are communicated with the heater to heat the circulating flow in the drying cylinder, so that the inside and the outside of the drying cylinder are heated the same, and the effect of uniformly drying concrete aggregate is achieved.

Description

Concrete aggregate drying device

Technical Field

The utility model relates to the technical field of drying machines, in particular to a concrete aggregate drying device.

Background technique

Concrete aggregate drying refers to drying concrete aggregate with high humidity through a drying device to achieve the specified degree of dryness. The control of temperature during the drying of aggregates has different effects on the humidity of concrete aggregates. Inappropriate temperature can cause scorching, carbonization and cracking on the surface of aggregates, causing the aggregates to lose some strength and compressive capacity. Different humidity levels will also affect the production ratio, thereby affecting the quality of concrete. Therefore, appropriate drying temperature is of great significance to ensuring the strength and quality of concrete.

Most existing concrete aggregate drying devices introduce heat sources such as heated gas or heated liquid into the surface of the drying device, heat the outer wall of the drying device, and then transfer the heat to the inside for heating. This drying method causes the aggregate to be heated unevenly during drying, resulting in different drying effects of different parts of the aggregate, which in turn affects the production quality of concrete.

Summary of the invention

The utility model aims at the deficiencies of the prior art and provides a drying device which can heat the inside of the device evenly.

The utility model is realized through the following technical scheme: a concrete aggregate drying device, comprising a mounting frame, a heater and a drying cylinder fixed on the mounting frame, a feeding port and a discharging port are respectively provided at the front and rear ends of the drying cylinder, a rotating shaft with an inner cavity is rotatably installed in the drying cylinder, a spiral blade of the inner cavity is fixedly connected to the outer wall of the rotating shaft, the rotating shaft is provided with a driving motor for driving the rotating shaft to rotate, a heat dissipation hole connecting the inner cavity of the rotating shaft and the inner cavity of the spiral blade is opened on the outer wall of the rotating shaft, a sealed heating layer is provided on the outer wall of the drying cylinder, a heating cavity is formed between the heating layer and the drying cylinder, an input end of the heater is connected to the heating cavity, an output end of the heater is connected to one end of the cavity in the rotating shaft, and the other end of the cavity in the rotating shaft is connected to the heating cavity through a conveying pipe.

The heater of this scheme outputs the heat source to the cavity inside the rotating shaft, and disperses it to the cavity inside the spiral blades for heating through the heat dissipation holes. When the heated spiral blades rotate, the concrete aggregate inside the drying cylinder can be evenly heated and dried. At the same time, the heat source enters the heating chamber through the conveying pipe to heat the outer wall of the drying cylinder to accelerate the drying, and returns to the input end of the heater after heating to form a circulating heat exchange. The heat source circulates inside and outside the drying cylinder, so that the inside and outside of the drying cylinder are heated equally, thereby achieving a uniform drying effect on the concrete aggregate.

As an optimization, the outer wall of the heating layer is provided with a sealed heat-insulating layer, and heat-insulating cotton is filled between the heat-insulating layer and the heating layer. This optimization scheme uses the heat-insulating layer to keep warm, prevent heat loss, and improve heating efficiency.

As an optimization, a plurality of heat-conducting blocks are arranged in the heating chamber, and the plurality of heat-conducting blocks are distributed along the circumference of the drying cylinder and fixed to the outer wall of the drying cylinder. This optimization scheme absorbs heat through the heat-conducting blocks, thereby increasing the heating speed of the outer wall of the drying cylinder and improving the heat transfer efficiency.

As an optimization, the delivery pipe includes a main pipe connected to the rotating shaft and two branch pipes connected to the main pipe at one end, and the other ends of the two branch pipes are separated from each other and connected to the heating chamber. This optimization scheme enhances the delivery efficiency of the heat source in the rotating shaft by connecting the two branch pipes to the heating chamber respectively.

As an optimization, the output end of the drive motor is fixedly connected to a driving wheel, and the outer wall of the rotating shaft is fixedly connected to a driven wheel meshing with the driving wheel. This optimization solution realizes the motion transmission between the rotating shaft and the drive motor through the meshing of the driving wheel and the driven wheel, which is convenient for disassembly and assembly.

As an optimization, the feed port and the discharge port are both equipped with a gate valve. The gate valve of this optimization solution facilitates the control of the feed amount and the discharge amount.

The beneficial effect of the utility model is that the heat source output by the heater passes through the cavity in the rotating shaft, the cavity in the spiral blade, the conveying pipe, and the heating cavity, and is finally input back into the heater, thereby realizing circulating flow heating inside the drying cylinder, making the inside and outside of the drying cylinder heated equally, and achieving a uniform drying effect on concrete aggregates.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a front view of the utility model;

Fig. 2 is a cross-sectional view of the utility model;

FIG3 is a schematic diagram of the heat dissipation hole structure;

As shown in the figure:

1. Mounting frame, 2. Heater, 3. Drying cylinder, 4. Rotating shaft, 5. Spiral blades, 6. Driving motor, 7. Conveying pipe, 8. Heating chamber, 9. Insulation cotton, 10. Heat conducting block, 11. Heat dissipation hole, 12. Driving wheel, 13. Driven wheel, 14. Gate valve.

Detailed ways

In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

As shown in Figures 1 to 3, a concrete aggregate drying device includes a mounting frame 1 and a heater 2 and a drying cylinder 3 fixed on the mounting frame. The front end and the rear end of the drying cylinder are respectively provided with a feed port and a discharge port. In order to facilitate the control of the feed amount and the discharge amount, the feed port and the discharge port are both installed with a gate valve 14.

A rotating shaft 4 with an inner cavity is rotatably mounted in the drying cylinder 3, a spiral blade 5 with an inner cavity is fixedly connected to the outer wall of the rotating shaft 4, the rotating shaft is provided with a driving motor 6 for driving the rotating shaft to rotate, and a heat dissipation hole 11 connecting the inner cavity of the rotating shaft and the inner cavity of the spiral blade is opened on the outer wall of the rotating shaft 4. The rotating shaft 4 of this embodiment is rotatably mounted at the axis of the drying cylinder 3 through a bearing, and the heat dissipation hole 11 is spirally distributed along the connection between the rotating shaft and the spiral blade, which accelerates the transfer of the heat source and improves the heating efficiency.

Specifically, a driving wheel 12 is fixedly connected to the output end of the driving motor 6, and a driven wheel 13 meshing with the driving wheel is fixedly connected to the outer wall of the rotating shaft 4. The driving motor 6 of this embodiment is fixedly connected to the mounting frame 1, and the motion transmission between the rotating shaft and the driving motor is realized through the meshing of the driving wheel and the driven wheel, which is convenient for assembly and disassembly.

The outer wall of the drying drum 3 is provided with a sealed heating layer, and a heating chamber 8 is formed between the heating layer and the drying drum. The input end of the heater 2 is connected to the heating chamber 8, and the output end of the heater is connected to one end of the cavity in the rotating shaft 4. The other end of the cavity in the rotating shaft is connected to the heating chamber 8 through a delivery pipe 7. The delivery pipe 7 includes a main pipe connected to the rotating shaft and two branch pipes connected to the main pipe at one end. The other ends of the two branch pipes are separated from each other and connected to the heating chamber. The two branch pipes are respectively connected to the heating chamber to enhance the delivery efficiency of the heat source in the rotating shaft. In this embodiment, the output ends of the delivery pipe 7 and the heater 2 are both inserted into the inner cavity of the rotating shaft 4, so as to be rotatably sealed and connected to the rotating shaft.

In order to further improve the heating efficiency, a plurality of heat-conducting blocks 10 are provided in the heating chamber 8. The plurality of heat-conducting blocks 10 are distributed along the circumference of the drying cylinder 3 and fixedly connected to the outer wall of the drying cylinder. The heat-conducting blocks absorb heat to improve the heating speed of the outer wall of the drying cylinder. A sealed thermal insulation layer is provided on the outer wall of the heating layer. Thermal insulation cotton 9 is filled between the thermal insulation layer and the heating layer. The thermal insulation layer is used for insulation to prevent heat loss and improve the heating efficiency.

Working principle: The heater 2 outputs the heat source to the cavity inside the rotating shaft 4, and is dispersed to the cavity inside the spiral blade 5 through the heat dissipation holes 11 to heat the spiral blade. The heated spiral blade 5 can evenly dry the concrete aggregate when conveying the concrete aggregate. At the same time, the heat source enters the heating chamber 8 through the conveying pipe 7 to heat the outer wall of the drying cylinder 3 to accelerate the drying. After heating, it returns to the input end of the heater 2 to form a circulating heat exchange. The heat source circulates inside and outside the drying cylinder, so that the inside and outside of the drying cylinder are heated equally, thereby achieving a uniform drying effect on the concrete aggregate.

Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims (6)

1. A concrete aggregate drying device, comprising a mounting frame (1), a heater (2) and a drying cylinder (3) fixed on the mounting frame, wherein a feed port and a discharge port are respectively provided at the front and rear ends of the drying cylinder, and characterized in that: a rotating shaft (4) with an inner cavity is rotatably mounted in the drying cylinder (3), a spiral blade (5) with an inner cavity is fixedly connected to the outer wall of the rotating shaft, a driving motor (6) is provided on the rotating shaft for driving the rotating shaft to rotate, a heat dissipation hole (11) is provided on the outer wall of the rotating shaft for connecting the inner cavity of the rotating shaft and the inner cavity of the spiral blade, a sealed heating layer is provided on the outer wall of the drying cylinder (3), a heating chamber (8) is formed between the heating layer and the drying cylinder, an input end of the heater (2) is connected to the heating chamber (8), an output end of the heater (2) is connected to one end of the inner cavity of the rotating shaft (4), and the other end of the inner cavity of the rotating shaft is connected to the heating chamber via a conveying pipe (7). 2. A concrete aggregate drying device according to claim 1, characterized in that: the outer wall of the heating layer is provided with a sealed heat-insulating layer, and heat-insulating cotton (9) is filled between the heat-insulating layer and the heating layer. 3. A concrete aggregate drying device according to claim 1, characterized in that: a plurality of heat-conducting blocks (10) are arranged in the heating chamber (8), and the plurality of heat-conducting blocks are distributed along the circumference of the drying cylinder and fixed to the outer wall of the drying cylinder (3). 4. A concrete aggregate drying device according to claim 3, characterized in that: the conveying pipe (7) comprises a main pipe connected to the rotating shaft and two branch pipes connected to the main pipe at one end, and the other ends of the two branch pipes are separated from each other and connected to the heating chamber. 5. A concrete aggregate drying device according to claim 1, characterized in that: a driving wheel (12) is fixedly connected to the output end of the driving motor (6), and a driven wheel (13) meshing with the driving wheel is fixedly connected to the outer wall of the rotating shaft. 6. A concrete aggregate drying device according to claim 5, characterized in that: the feed inlet and the discharge outlet are both equipped with a gate valve (14).