Sand conveying device for precoated sand production

Abstract

The utility model discloses a sand conveying device for precoated sand production, and relates to the technical field of sand conveying devices, the sand conveying device comprises a feeding cylinder, one end of the feeding cylinder is provided with a circular groove, a rotating pipe is rotatably arranged in the circular groove, and the end, located in the feeding cylinder, of the rotating pipe is fixedly connected with an auger blade; the end, located outside the feeding barrel, of the rotating pipe is rotationally connected with a fixing sleeve, a partition block is fixedly connected to the inner wall of the fixing sleeve, a gas channel allowing gas to penetrate through is formed between the partition block and the inner wall of the fixing sleeve, the gas channel is in a fan shape and located on the lower half section of the fixing sleeve, and the partition block is attached to the rotating pipe. According to the sand conveying device for precoated sand production, by arranging the rotating pipe, the fixing sleeve and other structures, the functions of conveying, air drying and dust cleaning can be achieved at the same time, the use efficiency of the sand conveying device is improved, and sprayed gas is located at the position of the lower half section of the feeding barrel and better acts on sand, so that the sand can be fully turned over.

Description

Technical Field

[0001] The utility model relates to the technical field of sand material conveying devices, in particular to a sand material conveying device for producing coated sand. Background Art

[0002] Coated sand is molding sand or core sand with a solid resin film applied to the surface of the sand grains before molding. There are two coating processes: cold and hot. The cold method involves dissolving the resin in ethanol and adding hexamethylenetetramine during the sand mixing process. The two coat the sand grains, and the ethanol evaporates to produce the coated sand. The hot method involves preheating the sand to a certain temperature, adding the resin to melt it, and stirring it until the resin coats the sand grains. A hexamethylenetetramine aqueous solution and a lubricant are then added. The sand is then cooled, crushed, and sieved to produce the coated sand, which is suitable for steel and iron castings.

[0003] During the production process of coated sand, the raw sand of coated sand needs to be loaded in advance. The existing conveying device has a relatively simple function and is mostly transported through conveyor belts, which easily generates flying dust and its utilization efficiency needs to be improved.

[0004] Therefore, it is necessary to propose a sand material conveying device for coated sand production to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a sand conveying device for coated sand production, so as to solve the problem that in the process of coated sand production, the raw sand of coated sand needs to be loaded in advance, the existing conveying device has a relatively single function, and mostly transports sand through a conveyor belt, which easily generates flying dust and the utilization efficiency needs to be improved.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sand conveying device for coated sand production, comprising a feeding barrel, a circular groove is provided at one end of the feeding barrel, and a rotating tube is rotatably arranged inside the circular groove, and the rotating tube is located at one end inside the feeding barrel and is fixedly connected to a screw dragon blade, and the rotating tube is located at one end outside the feeding barrel and is rotatably connected to a fixed sleeve, and a spacer is fixedly connected to the inner wall of the fixed sleeve, and a gas channel for gas to pass through is formed between the spacer and the inner wall of the fixed sleeve, and the gas channel is fan-shaped, and the gas channel is located in the lower half of the fixed sleeve, and the spacer is attached to the rotating tube, and a horizontal bar is fixedly connected to the inside of the rotating tube, and the horizontal bar divides the inside of the rotating tube into two air chambers, and a first air hole is provided at the upper and lower ends of the rotating tube, and the first air hole is connected to the corresponding air chamber, and a second air hole for suction is provided on the inner wall of the top of the feeding barrel.

[0007] Preferably, the first air holes are provided in plurality, and the plurality of first air holes are distributed at equal distances.

[0008] Preferably, the second air holes are provided in plurality, and the plurality of second air holes are distributed at equal distances.

[0009] Preferably, an inner chamber is opened inside the wall of the top of the feeding barrel, and the second air hole is connected to the inner chamber. The second air hole is provided in plurality, and the plurality of second air holes are distributed at equal distances.

[0010] Preferably, a support plate is fixedly connected to the outer wall of the feeding barrel, an air pump and a processing box are fixedly connected to the support plate, a filtering device is provided inside the processing box, and the air pump and the processing box are sequentially connected between the fixed sleeve and the inner chamber.

[0011] Preferably, a driving assembly for driving the rotating tube is provided on the outside of the feeding barrel, and the driving assembly includes a motor, a first gear and a second gear. The motor is fixedly connected to the outer wall of the feeding barrel, the first gear is fixedly connected to the driving shaft of the motor, the second gear is fixedly connected to the rotating tube, and the first gear and the second gear are meshed together.

[0012] Preferably, the feeding cylinder is provided with a feeding pipe and a discharging pipe.

[0013] The technical effects and advantages of this utility model are:

[0014] 1. The utility model can realize the functions of conveying, air drying and dust cleaning at the same time by setting the rotating tube, fixed sleeve and other structures, thereby improving the use efficiency of the sand conveying device. The ejected gas is in the lower half of the feeding tube, which better acts on the sand and enables the sand to be fully turned over.

[0015] 2. The rotation of the rotating tube can adjust the direction of the first air hole, change the angle of wind action, and expand the flipping effect;

[0016] 3. The dust can be sucked away in time through the inner chamber and the second air hole to achieve the effect of dust cleaning, which is convenient for the subsequent use of the sand material; and the inside of the feeding barrel can be cleaned in time to avoid affecting the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the sand conveying device for producing coated sand in the utility model.

[0018] Figure 2 This is a schematic cross-sectional view of the sand conveying device for producing coated sand according to the present invention.

[0019] Figure 3 For this utility model Figure 2 A magnified schematic diagram of the structure in the middle.

[0020] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0021] Figure 5 This is a schematic diagram of the structure of the fixing sleeve and the spacer block of the utility model.

[0022] In the figure: 1. Feed barrel; 2. Rotating tube; 3. Auger blade; 4. Horizontal bar; 5. Air chamber; 6. First air hole; 7. Inner chamber; 8. Second air hole; 9. Fixed sleeve; 10. Spacer; 11. Gas channel; 12. Support plate; 13. Motor; 14. First gear; 15. Second gear; 16. Air pump; 17. Processing box. DETAILED DESCRIPTION

[0023] The utility model provides Figures 1 to 5 The device for conveying sand for producing coated sand shown in the figure comprises a feed barrel 1, one end of which is provided with a circular groove, within which a rotating tube 2 is rotatably mounted. An auger blade 3 is fixedly connected to the end of the rotating tube 2 located within the feed barrel 1, and the rotating tube 2 rotates synchronously with the auger blade 3. The feed barrel 1 is provided with a feed pipe and a discharge pipe, wherein the feed pipe is located above the end of the feed barrel 1 near the circular groove, and the discharge pipe is located below the end of the feed barrel 1 away from the circular groove.

[0024] The outside of the feeding barrel 1 is provided with a driving assembly that drives the rotating tube 2 to rotate. The driving assembly includes a motor 13, a first gear 14 and a second gear 15. The motor 13 is fixedly connected to the outer wall of the feeding barrel 1, the first gear 14 is fixedly connected to the drive shaft of the motor 13, and the second gear 15 is fixedly connected to the rotating tube 2. The first gear 14 and the second gear 15 are meshed and connected.

[0025] Specifically, the motor 13 drives the first gear 14 to rotate. Since the first gear 14 and the second gear 15 are meshed and connected, the second gear 15 drives the rotating tube 2 and the auger blade 3 to rotate, thereby transporting the sand material for the production of coated sand.

[0026] The device can also be used to transport other materials and can be selected according to specific usage.

[0027] Considering that the existing conveying devices have relatively simple functions and are mostly transported through conveyor belts, which are prone to generating flying dust, the rotating tube 2 is rotatably connected to a fixed sleeve 9 at one end outside the feeding barrel 1. A spacer 10 is fixedly connected to the inner wall of the fixed sleeve 9. A gas channel 11 for gas to pass through is formed between the spacer 10 and the inner wall of the fixed sleeve 9. The gas channel 11 is fan-shaped and located in the lower half of the fixed sleeve 9. The spacer 10 fits on the rotating tube 2. A horizontal bar 4 is fixedly connected to the inside of the rotating tube 2. The horizontal bar 4 divides the inside of the rotating tube 2 into two air chambers 5. First air holes 6 are provided at both the upper and lower ends of the rotating tube 2. The first air holes 6 are provided in multiple numbers, and the multiple first air holes 6 are equidistantly distributed. The first air holes 6 are connected to the corresponding air chambers 5.

[0028] During the rotation of the rotating tube 2, one of the air chambers 5 that rotates to the lower position can be connected with the fixed sleeve 9 through the gas channel 11, so that the gas can enter the interior of the air chamber 5 through the fixed sleeve 9 and the gas channel 11, and be ejected from the corresponding first air hole 6. The ejected gas is in the lower half of the feeding barrel 1. Since the sand material will be concentrated in the lower half of the feeding barrel 1 due to gravity during the conveying process, the sand material can be better acted on, so that the sand material is fully turned over and the dust is separated from the sand material.

[0029] Furthermore, the rotation of the rotating tube 2 can adjust the direction of the first air hole 6, change the angle of wind action, and expand the flipping effect.

[0030] At the same time, the spacer 10 closes the port of the wind chamber 5 at the upper position, that is, the corresponding first air hole 6 will not spray gas, avoiding the dispersion of wind force, so that the gas sprayed from the first air hole 6 located in the lower half of the feeding barrel 1 can fully act on the sand material.

[0031] The inner wall of the top of the feed barrel 1 is provided with a plurality of second air holes 8 for suction. Multiple second air holes 8 are arranged at equal distances. An inner chamber 7 is formed within the wall of the top of the feed barrel 1. The second air holes 8 communicate with this inner chamber 7. Multiple second air holes 8 are arranged at equal distances. The inner chamber 7 and second air holes 8 allow dust to be promptly removed, effectively cleaning the sand material and facilitating subsequent use. This also allows for timely cleaning of the interior of the feed barrel 1, preventing any impact on the external environment.

[0032] In addition, for some wet sand materials, it also has the effect of air drying; and a heating device can be set in the fixed sleeve 9 for cooperation, and the heating device includes structures such as electric heating wires.

[0033] By setting up structures such as the rotating tube 2 and the fixed sleeve 9, the functions of conveying, air drying and dust cleaning can be achieved simultaneously, thereby improving the utilization efficiency of the sand conveying device. The ejected gas is in the lower half of the feeding barrel 1, which better acts on the sand material, so that the sand material can be fully turned over.

[0034] A support plate 12 is fixedly connected to the outer wall of the feed barrel 1, and an air pump 16 and a processing box 17 are fixedly connected to the support plate 12. A filtering device is provided inside the processing box 17. The filtering device includes a filter screen and other structures to filter dust. The air pump 16 and the processing box 17 are sequentially connected between the fixed sleeve 9 and the inner chamber 7. The docking pipe between the air pump 16 and the fixed sleeve 9 is made of hard material to fix the position of the fixed sleeve 9.

[0035] During operation, as the rotating tube 2 rotates, one of the air chambers 5 that rotates to the lower position can be connected to the fixed sleeve 9 through the gas channel 11. The air pump 16 transports the gas from the fixed sleeve 9 and the gas channel 11 to the interior of the air chamber 5, and sprays it out from the corresponding first air hole 6, so that the sand material is fully turned over and the dust is separated from the sand material; at the same time, the dust is sucked away in time by the inner chamber 7 and the second air hole 8, and the dust is filtered inside the processing box 17.

Claims

1. A sand material conveying device for producing coated sand, comprising a feeding barrel (1), wherein one end of the feeding barrel (1) is provided with a circular groove, a rotating tube (2) is rotatably arranged inside the circular groove, and one end of the rotating tube (2) located inside the feeding barrel (1) is fixedly connected to an auger blade (3), characterized in that: The rotating tube (2) is rotatably connected to a fixed sleeve (9) at one end outside the feeding tube (1), and a spacer (10) is fixedly connected to the inner wall of the fixed sleeve (9). A gas channel (11) for gas to pass through is formed between the spacer (10) and the inner wall of the fixed sleeve (9). The gas channel (11) is fan-shaped and located in the lower half of the fixed sleeve (9). The spacer (10) is attached to the rotating tube (2). The interior of the rotating tube (2) is fixedly connected to a horizontal bar (4), which divides the interior of the rotating tube (2) into two air chambers (5). The upper and lower ends of the rotating tube (2) are both provided with a first air hole (6), which is connected to the corresponding air chamber (5). The inner wall of the top of the feeding tube (1) is provided with a second air hole (8) for suction.

2. The sand conveying device for producing coated sand according to claim 1, characterized in that: The first air holes (6) are provided in plurality, and the plurality of first air holes (6) are distributed at equal distances.

3. The sand conveying device for producing coated sand according to claim 1, characterized in that: The second air holes (8) are provided in plurality, and the plurality of second air holes (8) are distributed at equal distances.

4. The sand conveying device for producing coated sand according to claim 1, characterized in that: An inner chamber (7) is provided inside the wall of the top of the feeding barrel (1), and the second air hole (8) is communicated with the inner chamber (7). The second air hole (8) is provided in a plurality, and the plurality of second air holes (8) are distributed at equal distances.

5. The sand conveying device for producing coated sand according to claim 4, characterized in that: A support plate (12) is fixedly connected to the outer wall of the feeding cylinder (1), an air pump (16) and a processing box (17) are fixedly connected to the support plate (12), a filtering device is provided inside the processing box (17), and the air pump (16) and the processing box (17) are sequentially connected between the fixed sleeve (9) and the inner chamber (7).

6. The sand conveying device for producing coated sand according to claim 1, characterized in that: The outside of the feeding barrel (1) is provided with a driving assembly for driving the rotating tube (2) to rotate, and the driving assembly includes a motor (13), a first gear (14) and a second gear (15). The motor (13) is fixedly connected to the outer wall of the feeding barrel (1), the first gear (14) is fixedly connected to the driving shaft of the motor (13), the second gear (15) is fixedly connected to the rotating tube (2), and the first gear (14) and the second gear (15) are meshed and connected.

7. The sand conveying device for producing coated sand according to claim 1, characterized in that: The feeding cylinder (1) is provided with a feeding pipe and a discharging pipe.

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