A coated sand drying device

Abstract

The utility model provides a kind of coated sand drying device, it is related to coated sand drying technical field, including: shell, the bottom of the rotating pipe being rotationally arranged on shell inner wall upside is closed end, rotating pipe side wall is provided with multiple heat-conducting stirring plates for stirring coated sand, heating pipe is provided in the shell top and inserted into rotating pipe interior, drive assembly is provided on the shell and is used to drive rotating pipe rotation, hot air blower is symmetrically provided on the opposite two side walls of shell, hollow arc plate is embedded in shell inner wall and is communicated with hot air blower, multiple air blowing holes are formed in the side of hollow arc plate close to heat-conducting stirring plate, the side of hollow arc plate close to heat-conducting stirring plate is provided with shielding net for shielding coated sand.The utility model structure is reasonable, and coated sand in central position can be heated and dried, and drying efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of coated sand drying technology, specifically, to a drying device for coated sand. Background Technology

[0002] Coated sand, or molding sand or core sand, has a solid resin film coated on its surface before molding and is widely used in casting molds. There are two coating processes: cold and hot. The cold process involves dissolving the resin in ethanol and adding hexamethylenetetramine during sand mixing, causing both to coat the sand grains. The ethanol evaporates, resulting in coated sand. The hot process involves preheating the sand to a certain temperature, adding resin to melt it, stirring to coat the sand grains with resin, adding a hexamethylenetetramine aqueous solution and lubricant, cooling, crushing, and sieving to obtain coated sand for use in steel and iron castings. Coating is a crucial step in the coated sand process, and both the cold and hot processes require the sand to be dry before coating.

[0003] In existing technologies, coated sand drying devices typically dry the coated sand directly by blowing air onto the inner wall of the casing. The coated sand in the center is difficult to contact with the hot air and requires heat conduction between the coated sand particles to complete the drying process, resulting in significant time waste and low drying efficiency. A new coated sand drying device is needed to solve these problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a drying device for coated sand to solve the problems mentioned in the background art. The utility model has a reasonable structure, and the coated sand in the central position can be heated and dried, thereby improving the drying efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a drying device for coated sand, comprising: The housing has a rotating tube with a closed bottom rotatably mounted on the upper side of its inner wall. Multiple heat-conducting stirring plates for stirring the coated sand are mounted on the sidewall of the rotating tube. A heating tube inserted into the rotating tube is mounted on the top of the housing. A drive assembly for rotating the rotating tube is mounted on the housing. Hot air blowers are symmetrically mounted on opposite side walls of the housing. A hollow arc-shaped plate connected to the hot air blowers is embedded in the inner wall of the housing. Multiple air holes are opened on the side of the hollow arc-shaped plate near the heat-conducting stirring plates. A shielding net for shielding the coated sand is mounted on the side of the hollow arc-shaped plate near the heat-conducting stirring plates.

[0006] Furthermore, the drive assembly includes a drive motor disposed on the top of the housing, a drive gear located inside the housing is provided on the output shaft of the drive motor, and a driven gear meshing with the drive gear is provided on the side wall of the rotating tube.

[0007] Furthermore, the inner wall of the housing is provided with a support plate located below the drive gear, the rotating tube passes through the support plate, the side wall of the rotating tube is provided with a limiting ring embedded in the top of the support plate, a second bearing is provided at the connection between the limiting ring and the support plate, and a first bearing is provided at the connection between the rotating tube and the housing.

[0008] Furthermore, a connecting pipe is provided at the connection between the hot air blower and the hollow arc-shaped plate.

[0009] Furthermore, an exhaust port is provided on the top of the housing.

[0010] Furthermore, a feed hopper is provided at the top of the shell, a discharge pipe is provided at the bottom of the shell, a discharge valve is provided on the side wall of the discharge pipe, and a downwardly recessed arc-shaped groove is provided on the lower side of the inner wall of the shell.

[0011] The beneficial effects achieved by the present invention using the above structure are as follows: This invention uses a heating tube to heat a rotating tube, which in turn conducts heat to a heat-conducting stirring plate. As the rotating tube drives the heat-conducting stirring plate to rotate, the coated sand at the center is heated and dried. At the same time, a hot air blower supplies hot air to the hollow arc-shaped plate. The hot air flows out from multiple air holes to blow and dry the coated sand on the outside, thus accelerating the drying speed and improving the drying efficiency. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a perspective view of a drying apparatus for coated sand according to an embodiment of the present invention; Figure 2 This is a front sectional view of a drying apparatus for coated sand according to an embodiment of the present invention; Figure 3 This is a cross-sectional perspective view of a drying apparatus for coated sand according to an embodiment of the present invention; Figure 4 This is a perspective view of the connection between the hot air blower and the hollow arc plate in a drying device for coated sand according to an embodiment of the present invention. In the diagram: 1. Shell; 2. Feed hopper; 3. Heating tube; 4. Drive assembly; 41. Drive motor; 42. Drive gear; 43. Driven gear; 5. Exhaust port; 6. Hot air blower; 61. Connecting pipe; 7. Discharge pipe; 8. Discharge valve; 9. Rotating pipe; 91. First bearing; 92. Limiting ring; 93. Second bearing; 10. Support plate; 11. Heat-conducting stirring plate; 12. Hollow arc plate; 121. Air blowing hole; 13. Shielding net. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] like Figure 1 As shown, this utility model provides a technical solution: a drying device for coated sand, comprising: The shell 1 has a rotating tube 9 with a closed bottom on the upper side of its inner wall. The rotating tube 9 has multiple heat-conducting stirring plates 11 on its side wall for stirring the coated sand. The top of the shell 1 has a heating tube 3 inserted into the rotating tube 9. The shell 1 has a driving assembly 4 for driving the rotating tube 9 to rotate. Hot air blowers 6 are symmetrically arranged on opposite side walls of the shell 1. A hollow arc-shaped plate 12 connected to the hot air blower 6 is embedded in the inner wall of the shell 1. Multiple air blowing holes 121 are opened on the side of the hollow arc-shaped plate 12 near the heat-conducting stirring plate 11. A shielding net 13 for shielding the coated sand is provided on the side of the hollow arc-shaped plate 12 near the heat-conducting stirring plate 11. The design uses a drive assembly 4 to rotate a rotating tube 9, which in turn rotates a heat-conducting stirring plate 11 to stir the coated sand. A heating tube 3 heats the rotating tube 9, which in turn conducts heat to the heat-conducting stirring plate 11. Under the action of the rotating tube 9 driving the heat-conducting stirring plate 11 to rotate, the coated sand in the center position is heated and dried. At the same time, a hot air blower 6 supplies hot air to the hollow arc plate 12. The hot air flows out from multiple air holes 121 to blow and dry the coated sand on the outside, thus accelerating the drying speed and improving the drying efficiency. The side of the shielding net 13 closest to the heat-conducting stirring plate 11 is flush with the inner wall of the shell 1 in the vertical direction.

[0015] Reference Figure 2 and Figure 3The drive assembly 4 includes a drive motor 41 mounted on the top of the housing 1. A drive gear 42 located inside the housing 1 is mounted on the output shaft of the drive motor 41. A driven gear 43 meshing with the drive gear 42 is mounted on the side wall of the rotating tube 9. This design allows the drive motor 41 in the drive assembly 4 to rotate the drive gear 42, which in turn rotates the driven gear 43. The rotation of the driven gear 43 then rotates the rotating tube 9, which in turn rotates the heat-conducting stirring plate 11, facilitating the stirring of the coated sand.

[0016] Reference Figure 3 The inner wall of the housing 1 is provided with a support plate 10 located below the drive gear 42. The rotating tube 9 passes through the support plate 10. A limiting ring 92 is provided on the side wall of the rotating tube 9 and embedded in the top of the support plate 10. A second bearing 93 is provided at the connection between the limiting ring 92 and the support plate 10, and a first bearing 91 is provided at the connection between the rotating tube 9 and the housing 1. This design prevents the rotating tube 9 from shifting downwards through the limiting ring 92, and improves the stability of the rotating tube 9 driving the heat-conducting stirring plate 11 to rotate through the first bearing 91 and the second bearing 93.

[0017] Reference Figure 1 and Figure 4 A connecting pipe 61 is provided at the connection between the hot air blower 6 and the hollow arc plate 12. This design facilitates air supply to the hollow arc plate 12 through the connecting pipe 61.

[0018] Reference Figure 1 The top of the housing 1 has an exhaust port 5. This design allows for the convenient discharge of steam generated during drying.

[0019] Reference Figure 1 and Figure 2 The shell 1 has a feed hopper 2 at the top and a discharge pipe 7 at the bottom. The discharge pipe 7 has a discharge valve 8 on its side wall, and the lower inner wall of the shell 1 has a downward-recessed arc-shaped groove. This design facilitates the complete outflow of the coated sand from the arc-shaped groove and the discharge pipe 7 into the interior of the shell 1.

[0020] Reference Figures 1-4As an embodiment of this utility model: when it is necessary to dry the coated sand, the worker feeds the coated sand into the shell 1 through the feed hopper 2. The heating tube 3 heats the rotating tube 9, which in turn conducts heat to the heat-conducting stirring plate 11. Then, the drive assembly 4 drives the rotating tube 9 to rotate, which in turn drives the heat-conducting stirring plate 11 to rotate and stir the coated sand. Under the action of the rotating tube 9 driving the heat-conducting stirring plate 11 to rotate, the coated sand in the center position is heated and dried. At the same time, the symmetrically arranged hot air blowers 6 supply hot air to the hollow arc plate 12. The hot air forms convection and flows out from multiple air blowing holes 121 to blow and dry the coated sand on the outside. This increases the contact area between the coated sand and the heat, speeds up the drying process, improves the drying efficiency, and enhances the practicality of this utility model.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drying apparatus for coated sand, characterized in that, include: The shell (1) has a rotating tube (9) with a closed bottom on the upper side of the inner wall of the shell (1). The rotating tube (9) has multiple heat-conducting stirring plates (11) for stirring the coated sand on its side wall. The shell (1) has a heating tube (3) inserted into the rotating tube (9) on its top. The shell (1) has a driving assembly (4) for driving the rotating tube (9) to rotate. Hot air blowers (6) are symmetrically arranged on the opposite side walls of the shell (1). The shell (1) has a hollow arc plate (12) connected to the hot air blower (6) embedded in its inner wall. The hollow arc plate (12) has multiple air holes (121) on the side near the heat-conducting stirring plate (11). The hollow arc plate (12) has a shielding net (13) for shielding the coated sand on the side near the heat-conducting stirring plate (11).

2. The drying apparatus for coated sand according to claim 1, characterized in that, The drive assembly (4) includes a drive motor (41) disposed on the top of the housing (1). The output shaft of the drive motor (41) is provided with a drive gear (42) located inside the housing (1). The side wall of the rotating tube (9) is provided with a driven gear (43) that meshes with the drive gear (42).

3. The drying apparatus for coated sand according to claim 2, characterized in that, The inner wall of the housing (1) is provided with a support plate (10) located below the drive gear (42). The rotating tube (9) passes through the support plate (10). The side wall of the rotating tube (9) is provided with a limiting ring (92) embedded in the top of the support plate (10). A second bearing (93) is provided at the connection between the limiting ring (92) and the support plate (10). A first bearing (91) is provided at the connection between the rotating tube (9) and the housing (1).

4. The drying apparatus for coated sand according to claim 1, characterized in that, A connecting pipe (61) is provided at the connection between the hot air blower (6) and the hollow arc plate (12).

5. The drying apparatus for coated sand according to claim 1, characterized in that, The top of the housing (1) is provided with an exhaust port (5).

6. The drying apparatus for coated sand according to claim 1, characterized in that, The top of the housing (1) is provided with a feeding hopper (2), the bottom of the housing (1) is provided with a discharge pipe (7), the side wall of the discharge pipe (7) is provided with a discharge valve (8), and the lower side of the inner wall of the housing (1) is provided with a downwardly recessed arc groove.

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