A kind of foundry waste sand preheating and drying device

Abstract

The utility model discloses a preheating and drying device for foundry waste sand, and belongs to the technical field of foundry waste sand processing. A preheating and drying device for foundry waste sand comprises a drying air duct, an inner liner feeding pipe is arranged inside the drying air duct, one end of the inner liner feeding pipe extends to the outside of the drying air duct, an integrally formed downflow air duct is arranged at the bottom of the drying air duct, a heat source air outlet is arranged at one end of the downflow air duct, and a metal hanger is arranged on the outside of one end of the inner liner feeding pipe. In order to solve the problem that the foundry waste sand is directly transported to a combustion furnace for combustion treatment after direct sun drying, and the heat in the combustion furnace is discharged with the air after combustion, which not only pollutes the environment but also wastes energy, the heat source fan transports the high-temperature airflow into the drying air duct through the pipeline, heats and dries the foundry waste sand inside through the inner liner feeding pipe, and completes the preheating and drying process while feeding, which can improve production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of foundry waste sand processing, in particular to a foundry waste sand preheating and drying device. Background Art

[0002] In the existing foundry waste sand regeneration device, the discarded and used foundry waste sand is processed and treated, and then used again. In the process of foundry waste sand regeneration, the recovered foundry waste sand needs to be dried, burned, crushed, filtered, proportioned, etc., especially the drying and preheating of foundry waste sand is very important, which directly affects the efficiency of foundry waste sand regeneration processing;

[0003] Most of them are directly dried in the sun and then transported to the combustion furnace for combustion treatment. At the same time, after the foundry waste sand is burned, the heat in the combustion furnace is discharged with the air, which not only pollutes the environment but also wastes energy. Utility Model Content

[0004] The purpose of the utility model is to provide a preheating and drying device for waste foundry sand. A heat source fan transports high-temperature airflow into a drying air duct through a pipeline, heats and dries the waste foundry sand inside through an inner tank feeding pipe, and completes the preheating and drying process while feeding, thereby improving production efficiency and solving problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a foundry waste sand preheating and drying device, comprising a drying air duct, an inner liner feeding pipe is arranged inside the drying air duct, one end of the inner liner feeding pipe extends to the outside of the drying air duct, an integrally formed down-flowing air duct is arranged at the bottom of the drying air duct, a heat source air outlet is arranged at one end of the down-flowing air duct, a metal hanger is arranged on the outside of one end of the inner liner feeding pipe, the metal hanger is connected to the inner liner feeding pipe by a flange, and a transmission shaft is arranged on the inside of the metal hanger.

[0006] Preferably, a feeding port is provided above the inner liner feeding pipe, a conveying shaft cavity is provided inside the inner liner feeding pipe, an auger section shaft is provided inside the conveying shaft cavity, and the auger section shaft is connected to the transmission shaft by bolts.

[0007] Preferably, a transfer bearing is provided between the transmission shaft and the liner feeding pipe, and the auger section shaft is rotatably connected to the liner feeding pipe via the transfer bearing.

[0008] Preferably, a drying air cavity is provided between the drying air duct and the inner tank feeding pipe, and the drying air cavity is connected through the downward air duct.

[0009] Preferably, a transmission pulley is provided in the middle section of the transmission shaft, and a transmission motor is provided below the transmission pulley.

[0010] Preferably, the transmission motor is connected to the metal bracket via bolts, and the transmission shaft is rotatably connected to the transmission motor via a crawler track.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the drying duct wraps the inner liner feeding pipe. During the process of conveying the foundry waste sand through the inner liner feeding pipe and the auger structure, the heat source fan conveys the high-temperature airflow into the drying duct through the pipeline, and heats and dries the inner foundry waste sand through the inner liner feeding pipe. The preheating and drying process is completed while conveying the material, which can improve the production efficiency;

[0013] 2. In the utility model, waste foundry sand can be fed into the feeding port, and the water vapor generated during the drying process can be discharged through the feeding port, so as to avoid the evaporated water remaining inside the inner tank feeding pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall front view of the utility model;

[0015] Figure 2 It is an overall side view of the utility model;

[0016] Figure 3 This is a schematic diagram of the drying air chamber structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the inner liner feeding pipe of the utility model.

[0018] In the figure: 1. Drying air duct; 2. Metal hanger; 3. Transmission shaft; 4. Inner tank feeding pipe; 101. Downward air duct; 102. Heat source air outlet; 103. Drying air chamber; 301. Adapter bearing; 302. Transmission pulley; 303. Transmission motor; 304. Auger section shaft; 401. Feeding port; 402. Conveying shaft chamber. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In order to solve the problem that the waste sand is directly transported to the combustion furnace for combustion after direct sun drying, and the heat in the combustion furnace is discharged with the air after the combustion, which not only pollutes the environment but also wastes energy; please refer to Figure 1-4 , the utility model provides the following solutions:

[0021] A foundry waste sand preheating and drying device comprises a drying air duct 1, an inner liner feeding pipe 4 is arranged inside the drying air duct 1, one end of the inner liner feeding pipe 4 extends to the outside of the drying air duct 1, an integrally formed downflow air duct 101 is arranged at the bottom of the drying air duct 1, a heat source air outlet 102 is arranged at one end of the downflow air duct 101, a metal hanger 2 is arranged outside one end of the inner liner feeding pipe 4, the metal hanger 2 is connected to the inner liner feeding pipe 4 through a flange, and a transmission shaft 3 is arranged inside the metal hanger 2;

[0022] In this embodiment, the drying duct 1 wraps the inner liner feeding pipe 4, and during the process of conveying the foundry waste sand through the inner liner feeding pipe 4 and the auger structure, the heat source fan conveys the high-temperature airflow into the drying duct 1 through the pipeline, and heats and dries the inner foundry waste sand through the inner liner feeding pipe 4, completing the preheating and drying process while conveying the material, which can improve the production efficiency;

[0023] A feeding port 401 is provided above the inner liner feeding pipe 4, a conveying shaft cavity 402 is provided inside the inner liner feeding pipe 4, an auger section shaft 304 is provided inside the conveying shaft cavity 402, the auger section shaft 304 is connected to the transmission shaft 3 by bolts, an adapter bearing 301 is provided between the transmission shaft 3 and the inner liner feeding pipe 4, the auger section shaft 304 is rotatably connected to the inner liner feeding pipe 4 through the adapter bearing 301, a drying air cavity 103 is provided between the drying air duct 1 and the inner liner feeding pipe 4, and the drying air cavity 103 is connected to the downflow air duct 101;

[0024] In this embodiment, the high-temperature airflow flows inside the drying air chamber 103, and the feed port 401 can be used to feed the foundry waste sand. At the same time, the water vapor generated during the drying process can be discharged through the feed port 401 to prevent the evaporated water from remaining inside the inner tank feeding pipe 4;

[0025] A transmission pulley 302 is provided in the middle section of the transmission shaft 3, a transmission motor 303 is provided below the transmission pulley 302, the transmission motor 303 is connected to the metal hanger 2 by bolts, and the transmission shaft 3 and the transmission motor 303 are rotationally connected by a crawler belt;

[0026] The transmission motor 303 drives the transmission pulley 302 and the transmission shaft 3 to rotate, thereby realizing the rotation operation of the auger section shaft 304.

[0027] Working principle: the drying air duct 1 wraps the inner liner feeding pipe 4. During the transportation of the foundry waste sand through the inner liner feeding pipe 4 and the auger structure, the heat source fan transports the high-temperature airflow to the drying air duct 1 through the pipeline. The high-temperature airflow flows inside the drying air cavity 103. The feeding port 401 can be used to put in the foundry waste sand, and the inner foundry waste sand is heated and dried through the inner liner feeding pipe 4. At the same time, the water vapor generated during the drying process can be discharged through the feeding port 401 to avoid the evaporated water from remaining in the inner liner feeding pipe 4. The preheating and drying process is completed while feeding, which can improve production efficiency.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundry waste sand preheating and drying device, comprising a drying air duct (1), characterized in that: An inner liner feeding pipe (4) is arranged inside the drying air duct (1), one end of the inner liner feeding pipe (4) extends to the outside of the drying air duct (1), an integrally formed downflow air duct (101) is arranged at the bottom of the drying air duct (1), one end of the downflow air duct (101) is arranged with a heat source air outlet (102), a metal hanger (2) is arranged on the outside of one end of the inner liner feeding pipe (4), the metal hanger (2) is connected to the inner liner feeding pipe (4) via a flange, and a transmission shaft (3) is arranged on the inside of the metal hanger (2).

2. The device for preheating and drying waste foundry sand according to claim 1, characterized in that: A feeding port (401) is arranged above the inner liner feeding pipe (4), a conveying shaft cavity (402) is arranged inside the inner liner feeding pipe (4), an auger section shaft (304) is arranged inside the conveying shaft cavity (402), and the auger section shaft (304) is connected to the transmission shaft (3) by bolts.

3. The device for preheating and drying waste foundry sand according to claim 2, characterized in that: A transfer bearing (301) is provided between the transmission shaft (3) and the inner liner feeding pipe (4), and the auger section shaft (304) is rotatably connected to the inner liner feeding pipe (4) via the transfer bearing (301).

4. The device for preheating and drying waste foundry sand according to claim 3, characterized in that: A drying air chamber (103) is provided between the drying air duct (1) and the inner liner feeding pipe (4), and the drying air chamber (103) is connected to the downflow air duct (101).

5. The device for preheating and drying waste foundry sand according to claim 1, characterized in that: A transmission pulley (302) is arranged in the middle section of the transmission shaft (3), and a transmission motor (303) is arranged below the transmission pulley (302).

6. The device for preheating and drying waste foundry sand according to claim 5, characterized in that: The transmission motor (303) is connected to the metal bracket (2) via bolts, and the transmission shaft (3) is rotationally connected to the transmission motor (303) via a crawler track.

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