Precoated sand dispersed heating device

Abstract

The utility model relates to the technical field of precoated sand heating, solves the technical problems that crude sand is easy to be heated unevenly and the quality of the precoated sand is influenced in the existing precoated sand processing process, and particularly relates to a precoated sand dispersing and heating device which comprises a mixing barrel, a sand inlet pipe is communicated and mounted on the mixing barrel, and a heating mechanism is arranged in the sand inlet pipe. A feeding pipe is installed on the mixing barrel in a communicating mode, a throwing mechanism is arranged in the feeding pipe, a stirring mechanism used for mixing crude sand and resin raw materials is installed in the mixing barrel, the lower portion of the mixing barrel is designed to be conical, a heating plate is installed in the side wall of the mixing barrel, and the heating mechanism comprises a protection pipe fixedly installed above a sand inlet pipe. A plurality of heating pipes are installed in the sand inlet pipe, and the heating pipes are sequentially arranged and installed in a trapezoid shape corresponding to the shape of the sand inlet pipe. According to the utility model, crude sand can be heated by the heating pipe layer by layer for multiple times, so that uniform dispersion heating is realized, and heating and laminating are performed again after stirring, thereby ensuring the quality of precoated sand.

Description

Technical Field

[0001] The utility model relates to the technical field of coated sand heating, in particular to a coated sand dispersion heating device. Background Art

[0002] At present, in the processing of coated sand, raw sand is generally poured into a mixing drum, and the raw sand in the mixing drum is heated by a heating device. After the raw sand is heated, resin is poured into the mixing drum and mixed with the raw sand, and then the resin is coated under continuous heating. However, in the process of heating the raw sand, due to incomplete stirring or stir-frying, the temperature close to the heating device will be higher, and the temperature of the raw sand far away from the heating device will be lower, so that the raw sand is prone to uneven heating, resulting in uneven coating of the raw sand, poor quality and uneven layers of the coated sand, which affects the processing quality of the coated sand. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a dispersed heating device for coated sand, which solves the technical problem that the raw sand is easily heated unevenly during the existing coated sand processing, thereby affecting the quality of the coated sand. During the processing, the raw sand can flow through multiple heating cylinders layer by layer for dispersed heating, thereby achieving the purpose of uniform heating.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a coated sand dispersion and heating device, comprising a mixing barrel, the mixing barrel is connected to and installed with a sand inlet pipe for raw sand to enter, the sand inlet pipe is provided with a heating mechanism for raw sand to flow layer by layer and enter the mixing barrel, the mixing barrel is connected to and installed with a feeding pipe, the feeding pipe is provided with a spreading mechanism for evenly dispersing resin to the outside and spreading it flat on the upper surface of the raw sand, and the mixing barrel is provided with a stirring mechanism for mixing raw sand and resin raw materials.

[0005] The lower part of the mixing barrel is designed to be conical, and a heating plate is installed in the side wall of the mixing barrel.

[0006] The heating mechanism comprises a trumpet-shaped protective tube fixedly installed above the sand inlet pipe, the cross section of the protective tube connected to the sand inlet pipe is hourglass-shaped, a plurality of heating tubes are installed in the sand inlet pipe, and the heating tubes are arranged in sequence in a trapezoidal shape corresponding to the shape of the sand inlet pipe.

[0007] Furthermore, the spreading mechanism includes a cross bar fixed in the feeding pipe, a handle is rotatably connected to the cross bar, a conical dispersion block is fixed to the lower end of the handle, and a plurality of partition strips are fixed to the dispersion block.

[0008] Furthermore, the stirring mechanism comprises a rotating rod rotatably connected to the mixing drum, three groups of scraping rods for cleaning the inner wall of the mixing drum are fixed on the rotating rod, and a motor for driving the rotating rod to rotate is installed on the mixing drum.

[0009] Furthermore, two stirring rods are fixed between the scraping rod and the rotating rod, and the heights of the three groups of stirring rods decrease in sequence.

[0010] Furthermore, a discharge pipe is connected to the lower end of the mixing cylinder, and a control valve for controlling whether sand is discharged is installed on the discharge pipe.

[0011] Furthermore, four supporting legs are installed at the lower end of the mixing barrel.

[0012] By means of the above technical solution, the utility model provides a coated sand dispersion heating device, which has at least the following beneficial effects:

[0013] 1. Due to the arrangement of the heating structure and the stirring mechanism, the utility model can slow down the falling time of the raw sand and increase the number of contacts with the heating tubes in the process of raw sand flowing downward layer by layer in the multi-layer heating tubes, thereby ensuring that the raw sand can be heated. The stirring mechanism and the heating plate on the inner wall of the mixing tube realize two-time dispersed heating, thereby ensuring the uniformity of heating and thus ensuring the quality of the coated sand.

[0014] 2. Due to the setting of the throwing mechanism of the utility model, when adding resin, by turning the handle, the handle can drive the dispersion block to rotate, and the resin can be scattered outward under the action of centrifugal force, so as to achieve uniform feeding, reduce the time of subsequent mixing and stirring, and increase the processing efficiency of coated sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0016] In the attached picture:

[0017] Figure 1 It is an overall schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the heating mechanism in the front cross-sectional view of the utility model;

[0019] Figure 3 This is a schematic diagram of the stirring mechanism in the utility model;

[0020] Figure 4 It is a schematic diagram of the throwing mechanism in the utility model.

[0021] In the figure: 1. mixing barrel; 2. sand inlet pipe; 3. heating mechanism; 301. protection tube; 302. heating tube; 4. feeding tube; 5. spreading mechanism; 501. handle; 502. dispersion block; 503. dividing strip; 6. stirring mechanism; 601. rotating rod; 602. scraper rod; 603. motor; 604. stirring rod; 7. discharge pipe. DETAILED DESCRIPTION

[0022] 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.

[0023] The coated sand mainly uses high-quality selected natural quartz sand as the raw sand, thermoplastic phenolic resin, urotropine and reinforcing agent as raw materials. The process is to mechanically mix the powdered thermosetting phenolic resin with the raw sand, solidify it when heated, and then develop it into coated sand prepared by a certain coating process using thermoplastic phenolic resin plus latent curing agent and lubricant. When the coated sand is heated, the resin coated on the surface of the sand particles melts. Under the action of the methylene decomposed by urotropine, the molten resin quickly changes from a linear structure to a non-melting body structure, thereby solidifying the coated sand into shape; however, in the process of coating sand processing, the raw sand is not easy to process. When the raw sand is heated, due to incomplete stirring or stir-frying, the raw sand is prone to uneven heating, resulting in uneven coating of the raw sand, affecting the quality of coated sand processing.

[0024] Reference Figure 1-Figure 4 This is an embodiment of the utility model: a coated sand dispersion and heating device, comprising a mixing drum 1, a sand inlet pipe 2 for raw sand to enter is connected and installed on the mixing drum 1, a heating mechanism 3 is arranged in the sand inlet pipe 2 for raw sand to flow layer by layer and enter the mixing drum, a feeding pipe 4 is connected and installed on the mixing drum 1, a sprinkling mechanism 5 is arranged in the feeding pipe 4 for making the resin evenly dispersed and sprinkled outward and spread on the upper surface of the raw sand, a stirring mechanism 6 for mixing the raw sand and the resin is installed in the mixing drum 1, the heating mechanism 3 passes through a plurality of heating tubes 302, the raw sand can flow downward layer by layer and contact the heating tubes 302 for multiple times to achieve uniform heating, the sprinkling mechanism 5 can evenly disperse the resin outward and sprinkle it on the upper surface of the raw sand to ensure the uniformity of the resin feeding.

[0025] When heating the raw sand, the temperature of the raw sand far away from the heating device may be lower, resulting in uneven heating of the raw sand, which can be solved by the following embodiments.

[0026] In this embodiment, refer to Figure 1-Figure 3As shown, the lower part of the mixing barrel 1 is conical in design, and a heating plate is installed in the side wall of the mixing barrel 1. The lower end of the mixing barrel 1 is connected to a discharge pipe 7, and a control valve for controlling whether to discharge sand is installed on the discharge pipe 7. After the coated sand is processed, the control valve can be opened to discharge sand. Four supporting feet are installed at the lower end of the mixing barrel 1 for support. The heating mechanism 3 includes a trumpet-shaped protective tube 301 fixedly installed above the sand inlet pipe 2. The cross-section of the protective tube 301 connected to the sand inlet pipe 2 is hourglass-shaped. A plurality of heating tubes 302 are installed in the sand inlet pipe 2. The heating tubes 302 are arranged in sequence in a trapezoidal shape corresponding to the shape of the sand inlet pipe 2. Before laminating, the raw sand is poured into the protective tube 301. The trumpet-shaped protective tube 301 can prevent the raw sand from spilling on the outside when pouring the sand. After the raw sand enters the sand inlet tube 2, it first falls on the uppermost heating tube 302. The raw sand passes through the gaps between the heating tubes 302 and gradually flows to the next layer, falling on the next layer of heating tubes 302 until it falls into the mixing drum 1. In the process of the raw sand flowing downward layer by layer in the multi-layer heating tubes 302, the falling time of the raw sand can be slowed down, and the number of contacts with the heating tubes 302 is increased, thereby ensuring that the raw sand can be heated, ensuring the uniformity of the heating of the raw sand, and achieving dispersed heating of the raw sand.

[0027] During the processing of coated sand, the raw sand may adhere to the inner wall of the mixing drum 1 during the coating process with the resin, which will affect the subsequent processing of the coated sand. The stirring mechanism 6 can solve this problem.

[0028] In this embodiment, refer to Figure 3 As shown, the stirring mechanism 6 includes a rotating rod 601 rotatably connected to the mixing drum 1, and three groups of scraping rods 602 for cleaning the inner wall of the mixing drum 1 are fixed on the rotating rod 601. The scraping rods 602 can clean the raw sand or resin adhering to the inner wall of the mixing drum 1 without affecting the subsequent processing and ensuring the processing quality. The mixing drum 1 is equipped with a motor 603 that drives the rotating rod 601 to rotate. Two stirring rods 604 are fixed between the scraping rod 602 and the rotating rod 601. The heights of the three groups of stirring rods 604 decrease in sequence. When the raw sand is added into the mixing drum 1 and the resin is added, the motor 603 is started at the same time. The resin continuously falls onto the raw sand in the mixing drum 1, and the rotating rod 601 drives the scraper rod 602 and the stirring rod 604 to stir the raw sand. At the same time, the heating plate in the inner wall of the mixing drum 1 heats the raw sand in the mixing drum 1. Because the heating mechanism 3 has been heated once, the raw sand in the mixing drum 1 is hot. Then, the raw sand is heated again by the heating plate in the inner wall of the mixing drum 1 to speed up the heating speed, thereby speeding up the coating effect of the raw sand and the resin. At the same time, the heating mechanism 3 and the heating plate on the inner wall of the mixing drum 1 realize two times of dispersed heating, thereby ensuring the uniformity of heating and thus ensuring the quality of the coated sand.

[0029] In order to prevent the resin in the same proportion as the raw sand from being directly poured into the mixing barrel 1 during coating, which will cause the resin to easily accumulate in a mass and be difficult to mix evenly with the raw sand, a throwing mechanism 5 can be used to solve this problem.

[0030] In this embodiment, refer to Figure 4 As shown, the spreading mechanism 5 includes a cross bar fixed in the feeding tube 4, and a handle 501 is rotatably connected to the cross bar. A conical dispersion block 502 is fixed to the lower end of the handle 501, and a plurality of dividing bars 503 are fixed to the dispersion block 502. When the raw sand enters the mixing drum 1, the coating resin is poured from the feeding tube 4, and the resin falling on the dispersion block 502 is affected by the dividing bars 503, and the resin falls between each dividing bar 503. Then, the handle 501 is rotated to drive the conical dispersion block 502 to rotate, so that the resin can be evenly dispersed outward under the action of centrifugal force and spread on the surface of the raw sand, so as to achieve uniform feeding, reduce the stirring and mixing time, and increase work efficiency.

[0031] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0032] 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.

[0033] 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 coated sand dispersion and heating device, comprising a mixing drum (1), characterized in that: The mixing cylinder (1) is connected to a sand inlet pipe (2) for raw sand to enter, and a heating mechanism (3) is arranged in the sand inlet pipe (2) for raw sand to flow layer by layer and enter the mixing cylinder. The mixing cylinder (1) is connected to a feeding pipe (4), and a throwing mechanism (5) is arranged in the feeding pipe (4) for evenly dispersing resin to the outside and spreading it on the upper surface of the raw sand. The mixing cylinder (1) is equipped with a stirring mechanism (6) for mixing raw sand and resin. The mixing barrel (1) has a conical design at the bottom, and a heating plate is installed in the side wall of the mixing barrel (1); The heating mechanism (3) comprises a trumpet-shaped protective tube (301) fixedly mounted above the sand inlet pipe (2); the cross section of the protective tube (301) connected to the sand inlet pipe (2) is hourglass-shaped; a plurality of heating tubes (302) are mounted in the sand inlet pipe (2); the heating tubes (302) are arranged in sequence in a trapezoidal shape corresponding to the shape of the sand inlet pipe (2).

2. The coated sand dispersion heating device according to claim 1, characterized in that: The spreading mechanism (5) comprises a crossbar fixed in the feeding pipe (4), a handle (501) is rotatably connected to the crossbar, a conical dispersion block (502) is fixed at the lower end of the handle (501), and a plurality of partition bars (503) are fixed on the dispersion block (502).

3. The coated sand dispersion heating device according to claim 1, characterized in that: The stirring mechanism (6) comprises a rotating rod (601) rotatably connected to the mixing drum (1), three groups of scraping rods (602) for cleaning the inner wall of the mixing drum (1) are fixed to the rotating rod (601), and a motor (603) for driving the rotating rod (601) to rotate is installed on the mixing drum (1).

4. The coated sand dispersion heating device according to claim 3, characterized in that: Two stirring rods (604) are fixed between the scraping rod (602) and the rotating rod (601), and the heights of the three groups of stirring rods (604) decrease in sequence.

5. The coated sand dispersion heating device according to claim 1, characterized in that: The lower end of the mixing cylinder (1) is connected to a discharge pipe (7), and a control valve for controlling whether sand is discharged is installed on the discharge pipe (7).

6. The coated sand dispersion heating device according to claim 1, characterized in that: The lower end of the mixing barrel (1) is provided with four supporting legs for support.

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