New sand pneumatic feeding device for mould sand mixer

Abstract

The application provides a new sand pneumatic conveying and adding device of a green sand mixing mill, relates to the technical field of green sand treatment equipment, and comprises a conveying pipeline, the other end of the conveying pipeline is provided with a material guide pipe, a positioning cover is arranged on the material guide pipe, a driving cylinder is arranged on the top of the positioning cover, a traction plate one is arranged on the output end of the bottom of the driving cylinder, a sealing plate one is arranged on the bottom of the traction plate one, a vertical rod is arranged on the bottom of the sealing plate one, a flow guide cone block is arranged on the side of the vertical rod, and a sealing plate two is arranged on the bottom of the vertical rod. The flow guide cone block guides airflow dispersion and wall adhesion, forms a pressurized airflow to clean the inner wall of the material guide pipe, reduces the adhesion of new sand on the inner wall of the pipeline, reduces the maintenance frequency and cost of the equipment, improves the production efficiency, and solves the problem that new sand continuously contacts and rubs the inner wall of the pipeline, pneumatic separation, humidity and other factors cause part of the new sand to adhere to the inner wall of the pipeline.

Description

Technical Field

[0001] This invention relates to the technical field of wet sand processing equipment, and more particularly to a pneumatic conveying and adding device for new sand in a wet sand mixer. Background Technology

[0002] Tide sand molding is the most widely used molding process in the foundry industry. The sand mixer is the core equipment for mixing tide sand. The addition of new sand is a key link to ensure the stability of core properties such as compaction rate, wet compressive strength, and permeability of molding sand, which directly determines the finished product quality and production efficiency of castings.

[0003] New sand is often added to the wet sand mixer using belt conveyors, bucket elevators, or pneumatic conveying. While pneumatic conveying devices offer the advantage of flexible layout, they also have certain drawbacks in actual use. When the airflow propels the new sand through the pipe, some of the new sand adheres to the inner wall of the pipe due to continuous contact and friction between the new sand and the inner wall, pneumatic separation, and humidity. If the new sand is not cleaned from the inner wall of the pipe in time, it may lead to excessive accumulation of new sand, affecting the flowability of the new sand in the pipe, reducing conveying efficiency, and requiring a lot of manpower and time for cleaning because the pipe is in a sealed state. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a pneumatic conveying and adding device for new sand in a wet sand mixer, thereby solving the problems mentioned in the background section.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a pneumatic conveying and feeding device for new sand in a wet sand mixer, specifically comprising: a conveying pipe, which is cylindrical in shape and has an air pump assembly installed at one end; the other end of the conveying pipe is conical and has a guide pipe installed thereon; a positioning cover is installed on the guide pipe; a drive cylinder is installed on the top of the positioning cover, and a traction plate is installed on the output end of the bottom of the drive cylinder; connecting plates are installed on both sides of the traction plate; a second traction plate is installed between the bottoms of the two connecting plates; the traction plate, connecting plates, and traction plate are slidably installed inside the positioning cover; a sealing plate is installed at the bottom of the traction plate; the sealing plate is arc-shaped and has a vertical rod installed at its bottom; a guide cone is installed on the side of the vertical rod, wherein the side of the guide cone is conical, and the second sealing plate is installed at the bottom of the vertical rod.

[0006] Furthermore, the guide pipe is designed according to its actual length, and a feed hopper assembly is installed on the side end of the guide pipe; the feed hopper assembly includes a gas-solid separation module and an exhaust pipe; a deformable connecting pipe is rotatably installed at the bend of the guide pipe; an airflow pipe is installed on one side of the air pump assembly; and an air delivery pipe is installed on the outside of the deformable connecting pipe.

[0007] Furthermore, one end of the gas supply pipe is connected to the side end of the gas flow pipe, and a flexible tube is connected between the gas supply pipes; multiple evenly distributed branch pipes are connected to the side of the gas supply pipe; the output end of the branch pipe is installed inside the deformable connecting pipe.

[0008] Furthermore, a conveyor pipe is installed at the top of the conveying pipe; the bottom of the conveyor pipe is inclined, and a large-diameter storage hopper is installed at the top of the conveyor pipe; a motor support plate is installed at the middle position of the top of the large-diameter storage hopper.

[0009] Furthermore, a servo motor is installed at the middle position of the top of the motor support plate, and a rotating plate is installed on the output end of the bottom of the servo motor; the rotating plate is located below the motor support plate, and cleaning scrapers are installed at both ends of the rotating plate.

[0010] Furthermore, the cleaning scraper is rotatably installed inside the large-diameter storage hopper; a hot air blower is installed at the bottom of the rotating plate, and a guide pipe is installed on the output end of the hot air blower.

[0011] Furthermore, the guide pipe is installed at the bottom of the rotating plate and on the inner side of the cleaning scraper, and an air jet pipe is installed at the side end of the guide pipe; the air jet pipe has multiple evenly distributed openings, and the air jet pipe is installed on the cleaning scraper.

[0012] Furthermore, two rotating rods and one rotating rod are rotatably installed on the inner side of the conveyor pipe. Gears are installed at the outer ends of the rotating rod and the two rotating rods. The gears at the outer ends of the two rotating rods are meshed with the gears at the outer end of the rotating rod. The rotating rod is located at the two rotating rods. A servo motor is installed on the outer side of the conveyor pipe. The output end of the servo motor is connected to the other outer end of the rotating rod.

[0013] Furthermore, a crushing component is installed on the outer side of both rotating rods; a material-pushing plate is installed on the outer side of the rotating rod; the material-pushing plate and the crushing component are rotatably installed on the inner side of the conveyor pipe.

[0014] Furthermore, a sealing plate three is installed at the bottom of the sealing plate two; a sealing plate four is installed at the top of the traction plate two; and a slot is provided on the guide pipe, wherein the sealing plate one, sealing plate two, sealing plate three and sealing plate four are slidably installed in the slot on the guide pipe.

[0015] This invention provides a pneumatic conveying and adding device for new sand in a wet sand mixer, which has the following beneficial effects: In use, this invention features positioning covers spaced at regular intervals on the feed pipe. A drive cylinder drives sealing plates one and two to adjust the position of the guide cones. The guide cones guide the airflow to disperse and flow along the wall, forming a pressurized airflow to clean the inner wall of the feed pipe. The spaced distribution ensures thorough cleaning without dead angles, reduces the adhesion of new sand to the inner wall of the pipe, avoids pipe blockage and reduced flowability caused by the accumulation of new sand, reduces equipment maintenance frequency and cost, and improves production efficiency.

[0016] In addition, deformable connecting pipes are installed at each bend of the feed pipe, and the side-connected diversion pipes are positioned in the outer ring area of ​​the bend. Part of the airflow generated by the air pump assembly blows the new sand at the bend through the airflow pipe, hose, air delivery pipe, and multiple diversion pipes, reducing problems such as poor conveying and pipe blockage caused by the accumulation of new sand at the bend, thus improving conveying efficiency and reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram: Figure 1 A schematic diagram of the overall structure of the present invention is shown; Figure 2 A three-dimensional structural diagram of the material conveying pipeline of the present invention is shown; Figure 3 A cross-sectional view of the deformable connecting pipe of the present invention is shown; Figure 4 A cross-sectional view of the large-diameter storage hopper of the present invention is shown; Figure 5 The invention is shown by Figure 4 A schematic diagram of the enlarged structure of part A is shown. Figure 6 A three-dimensional structural diagram of the cleaning scraper of the present invention is shown; Figure 7 A cross-sectional view of the positioning cover of the present invention is shown; Figure 8 A three-dimensional structural schematic diagram of traction plate one and traction plate two of the present invention is shown; Figure 9 A schematic diagram of the three-dimensional structure of the flow guide cone block of the present invention is shown.

[0020] List of reference numerals 1. Material conveying pipeline; 101. Air pump assembly; 102. Material guide pipe; 103. Feed hopper assembly; 104. Deformable connecting pipe; 105. Air flow pipe; 106. Air delivery pipe; 107. Diverter pipe; 2. Conveyor piping; 201. Large-diameter storage hopper; 202. Motor support plate; 203. Rotating plate; 204. Cleaning scraper; 205. Guide pipe; 206. Air jet pipe; 207. Rotating rod one; 208. Rotating rod two; 209. Crushing assembly; 2010. Feeding plate; 3. Positioning cover; 301. Traction plate one; 302. Connecting plate; 303. Traction plate two; 304. Sealing plate one; 305. Vertical rod; 306. Guide cone block; 307. Sealing plate two; 308. Sealing plate three; 309. Sealing plate four. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please refer to Figures 1 to 9 : Example 1: This invention proposes a pneumatic conveying and feeding device for new sand in a wet-sand mixing machine, comprising: a conveying pipe 1, which is cylindrical in shape and has an air pump assembly 101 installed at one end; the other end of the conveying pipe 1 is conical and has a guide pipe 102 installed thereon; the guide pipe 102 is of a length determined by the actual layout, and a feeding hopper assembly 103 is installed on its side; the feeding hopper assembly 103 includes a gas-solid separation module and an exhaust pipe; the guide pipe... A deformable connecting pipe 104 is rotatably installed at the bend of the pipe 102; an airflow pipe 105 is installed on one side of the air pump assembly 101; an air supply pipe 106 is installed on the outside of the deformable connecting pipe 104; one end of the air supply pipe 106 is connected to the side end of the airflow pipe 105, and a flexible hose is connected between the air supply pipes 106; multiple evenly distributed branch pipes 107 are connected to the side of the air supply pipe 106; the output end of the branch pipe 107 is installed inside the deformable connecting pipe 104.

[0023] In this embodiment of the invention, when the new sand of the wet-mold sand mixer is added via pneumatic conveying, the layout and length of the guide pipe 102 are adjusted according to the actual scenario. A deformable connecting pipe 104 is rotatably installed at each bend. Rotating the deformable connecting pipe 104 causes the side-connected diversion pipe 107 to be in the outer ring area of ​​the bend. The air pump assembly 101 operates, pushing the new sand inside the conveying pipe 1 to move, causing the new sand to flow along the guide pipe 102 and the deformable connecting pipe 104 into the interior of the feeding hopper assembly 103. The gas-solid separation module separates the airflow from the new sand. The airflow is discharged through the exhaust pipe, while the new sand is added to the wet sand mixer through the bottom of the feed hopper assembly 103. The airflow pipe 105 is adjusted according to the direction of the guide pipe 102. The airflow generated by the air pump assembly 101 flows through the airflow pipe 105 and the hose to the inside of the air delivery pipe 106. The airflow then flows through multiple diversion pipes 107 to the inside of the deformable connecting pipe 104. The diversion pipes 107 can blow the new sand in the turning area to prevent the new sand from accumulating in the turning area and ensure that the airflow pushes the new sand to move smoothly.

[0024] In Example 2, based on Example 1, a conveyor pipe 2 is installed at the top of the conveying pipe 1; the bottom of the conveyor pipe 2 is inclined, and a large-diameter storage hopper 201 is installed at the top of the conveyor pipe 2; a motor support plate 202 is installed at the middle position of the top of the large-diameter storage hopper 201; a servo motor is installed at the middle position of the top of the motor support plate 202, and a rotating plate 203 is installed on the output end of the servo motor; the rotating plate 203 is located below the motor support plate 202, and cleaning scrapers 204 are installed at both ends of the rotating plate 203; the cleaning scrapers 204 are rotatably installed inside the large-diameter storage hopper 201; a hot air blower is installed at the bottom of the rotating plate 203, and a guide pipe 205 is installed on the output end of the hot air blower; the guide pipe 205 is installed at the bottom of the rotating plate 203 and the cleaning scrapers 204. Inside the conveyor pipe 205, a jet pipe 206 is installed at the side end; the jet pipe 206 has multiple evenly distributed openings and is installed on the cleaning scraper 204; inside the conveyor pipe 2, two rotating rods 207 and one rotating rod 208 are rotatably installed, wherein gears are installed at the outer ends of the rotating rod 207 and the two rotating rods 208, and the gears at the outer ends of the two rotating rods 207 mesh with the gears at the outer ends of the rotating rod 208, and the rotating rod 208 is located at the two rotating rods 207; a servo motor is installed on the outer side of the conveyor pipe 2, and the output end of the servo motor is connected to the other outer end of the rotating rod 208; crushing components 209 are installed on the outer sides of the two rotating rods 207; a material feeding plate 2010 is installed on the outer side of the rotating rod 208;The feeding plate 2010 and crushing component 209 are rotatably installed inside the conveyor pipe 2. When new sand from the wet molding sand mixer is added via pneumatic conveying, the large-diameter storage hopper 201 stores a large amount of new sand. The bottom of the conveyor pipe 2 is installed inside the conveying pipe 1, and the bottom of the conveyor pipe 2 is inclined, allowing the airflow to move the added new sand. As the new sand flows downward, the servo motor on the motor support plate 202 drives the rotating plate 203 to rotate. The rotating plate 203 drives the cleaning scraper 204 to rotate, especially when the new sand decreases, scraping the new sand on the inner wall of the large-diameter storage hopper 201 to thoroughly clean the adhering new sand. When the rotating plate 203 drives the cleaning scraper 204 to rotate, it also drives the guide pipe 205 and the air jet. As pipe 206 rotates, the hot airflow generated by the hot air blower at the bottom of rotating plate 203 flows through guide pipe 205 into the interior of jet pipe 206. The airflow is then sprayed out through openings in jet pipe 206 to heat the new sand, reducing its moisture content. Meanwhile, the servo motor on the outside of conveyor pipe 2 drives rotating rod 208 to rotate. Gears at the outer end of rotating rod 208 drive rotating rods 207 at both ends, causing them to rotate and thus the crushing assembly 209 to crush the agglomerated new sand. Rotating rod 208, in turn, drives the feeding plate 2010 to feed new sand in batches, preventing sand accumulation. After the crushing operation by the upper and lower crushing assemblies 209, the flowability of the new sand is further improved, ensuring smooth conveying.

[0025] In Example 3, based on Example 1, a positioning cover 3 is installed on the guide pipe 102; a drive cylinder is installed on the top of the positioning cover 3, and a traction plate 301 is installed on the output end of the bottom of the drive cylinder; connecting plates 302 are installed on both sides of the traction plate 301; a traction plate 303 is installed between the bottoms of the two connecting plates 302; the traction plate 301, the connecting plates 302, and the traction plate 303 are slidably installed inside the positioning cover 3; a sealing plate 304 is installed at the bottom of the traction plate 301; the sealing plate 304 has an arc-shaped structure, and a vertical rod 30 is installed at the bottom of the sealing plate 304. 5; A guide cone 306 is installed on the side of the vertical rod 305, wherein the side of the guide cone 306 is a conical structure, and a sealing plate 2 307 is installed at the bottom of the vertical rod 305; a sealing plate 308 is installed at the bottom of the sealing plate 2 307; a sealing plate 4 309 is installed at the top of the traction plate 2 303; a slot is provided on the guide pipe 102, wherein the sealing plate 1 304, sealing plate 2 307, sealing plate 3 308 and sealing plate 4 309 are slidably installed in the slot on the guide pipe 102. When the new sand of the wet-form sand mixer is added by pneumatic conveying, it is fixed on the guide pipe 102. With the positioning cover 3 installed, when the new sand is flowing normally inside the feed pipe 102, the drive cylinder at the top of the positioning cover 3 drives the traction plate 1 301 to move upward. The traction plate 1 301 drives the traction plate 2 303 to move through the connecting plate 302, which in turn drives the sealing plate 3 308 and the sealing plate 4 309 to be installed in the slots on the feed pipe 102, ensuring the normal flow of the new sand. After the new sand is conveyed, the drive cylinder drives the traction plate 1 301 and the traction plate 2 303 to move downward again. Then, the bottom of the traction plate 1 301 drives the sealing plate 1 304 and the sealing plate 2 309 connected below by the vertical rod 305. 07 is installed in the slot on the guide pipe 102, so that the vertical rod 305 drives the guide cone 306 to be in the middle position inside the guide pipe 102. When the airflow is cleaning, the airflow is guided when it passes through the guide pipe 102, so that the airflow is dispersed and flows on the inner wall of the guide pipe 102. After the airflow is pressurized, it can clean the inner wall of the guide pipe 102. The high pressure and good cleaning effect, and the fixed-distance distribution can completely clean the entire pipe, ensuring that the problem of new sand adhesion is reduced, ensuring the smoothness of the inner wall of the guide pipe 102, and improving the fluidity of new sand when the pipe is reused.

[0026] The working principle of this embodiment: The feed pipe 102 is laid out and its length is determined according to the actual scene. Deformable connecting pipes 104 are installed at each bend. The large-diameter storage hopper 201 stores a large amount of new sand. The servo motor on the motor support plate 202 drives the rotating plate 203 and the cleaning scraper 204 to rotate, which in turn drives the guide pipe 205 and the jet pipe 206 to rotate. The hot air generated by the hot air blower at the bottom of the rotating plate 203 flows through the guide pipe 205 to the jet pipe 206 and sprays out to reduce the humidity in the new sand. The servo motor on the outside of the conveyor pipe 2 drives the rotating rod 208 to rotate. The gear at the outer end of the rotating rod 208 meshes and drives the upper and lower rotating rods 207 to rotate. The rotating rod 208 drives the feeding plate 2010 to feed new sand in batches. After the upper and lower crushing components 209 crush the new sand, the new sand flows smoothly through the conveyor pipe 2 into the inside of the conveying pipe 1. The feed pipe 102 is equipped with fixed distances of feed pipes 204 and 205. Positioning cover 3, the drive cylinder at the top of positioning cover 3 drives traction plate one 301 and traction plate two 303 to move upward. Sealing plate three 308 and sealing plate four 309 are installed in the slot on the guide pipe 102. The airflow generated by the working air pump assembly 101 pushes the new sand inside the conveying pipe 1 to move. The new sand flows along the guide pipe 102 and deformable connecting pipe 104 into the feed hopper assembly 103 and is then added to the wet molding sand mixer. After the new sand is conveyed, the drive cylinder drives the traction plate one 301 and traction plate two 303 to move upward. Plate 1 301 and traction plate 2 303 move downwards. Sealing plate 1 304 and sealing plate 2 307 connected below by vertical rod 305 are installed in the slot on the guide pipe 102. Vertical rod 305 drives the guide cone 306 to be in the middle position inside the guide pipe 102. When the airflow passes through the guide pipe 102, the airflow is dispersed and the pressure increases to clean the inner wall of the guide pipe 102, ensuring the smoothness of the inner wall of the guide pipe 102 and improving the fluidity of new sand when the pipe is reused.

[0027] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0028] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0029] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pneumatic conveying and feeding device for new sand in a wet-sand mixing machine, characterized in that, include: A material conveying pipe (1) is provided, with an air pump assembly (101) installed at one end; a guide pipe (102) is installed at the other end of the material conveying pipe (1); a positioning cover (3) is installed on the guide pipe (102); a drive cylinder is installed on the top of the positioning cover (3), and a traction plate one (301) is installed on the output end of the bottom of the drive cylinder; connecting plates (302) are installed on both sides of the traction plate one (301); a traction plate two (302) is installed between the bottoms of the two connecting plates (302). 303); the first traction plate (301), the connecting plate (302), and the second traction plate (303) are slidably installed on the inner side of the positioning cover (3); the bottom of the first traction plate (301) is equipped with a first sealing plate (304); the bottom of the first sealing plate (304) is equipped with a vertical rod (305); the side of the vertical rod (305) is equipped with a guide cone (306), wherein the side of the guide cone (306) is a cone-shaped structure, and the bottom of the vertical rod (305) is equipped with a second sealing plate (307).

2. The pneumatic conveying and adding device for new sand in the tidal sand mixer according to claim 1, characterized in that, A feed hopper assembly (103) is installed on the side end of the feed pipe (102); the feed hopper assembly (103) includes a gas-solid separation module and an exhaust pipe; a deformable connecting pipe (104) is rotatably installed at the bent position on the feed pipe (102); an airflow pipe (105) is installed on one side of the air pump assembly (101); and an air delivery pipe (106) is installed on the outside of the deformable connecting pipe (104).

3. The pneumatic conveying and adding device for new sand in the wet-sand mixing machine according to claim 2, characterized in that, One end of the gas supply pipe (106) is connected to the side end of the gas flow pipe (105), and a flexible hose is connected between the gas supply pipe (106) and the gas supply pipe (106); multiple evenly distributed branch pipes (107) are connected to the side of the gas supply pipe (106); the output end of the branch pipe (107) is installed inside the deformable connecting pipe (104).

4. The pneumatic conveying and adding device for new sand in the tidal sand mixer according to claim 3, characterized in that, A conveyor pipe (2) is installed at the top of the conveying pipe (1); a large-diameter storage hopper (201) is installed at the top of the conveyor pipe (2); a motor support plate (202) is installed at the middle position of the top of the large-diameter storage hopper (201).

5. The pneumatic conveying and adding device for new sand in the wet sand mixer according to claim 4, characterized in that, A servo motor is installed at the middle position of the top of the motor support plate (202), and a rotating plate (203) is installed on the output end of the bottom of the servo motor; the rotating plate (203) is located below the motor support plate (202), and cleaning scrapers (204) are installed at both ends of the rotating plate (203).

6. The pneumatic conveying and adding device for new sand in the tidal sand mixer according to claim 5, characterized in that, The cleaning scraper (204) is rotatably installed inside the large-diameter storage hopper (201); a hot air blower is installed at the bottom of the rotating plate (203), and a guide pipe (205) is installed on the output end of the hot air blower.

7. The pneumatic conveying and adding device for new sand in a wet-sand mixer according to claim 6, characterized in that, The guide pipe (205) is installed at the bottom of the rotating plate (203) and inside the cleaning scraper (204), and an air jet pipe (206) is installed at the side end of the guide pipe (205); the air jet pipe (206) is provided with multiple evenly distributed openings, and the air jet pipe (206) is installed on the cleaning scraper (204).

8. The pneumatic conveying and adding device for new sand in the tidal sand mixer according to claim 7, characterized in that, The inner side of the conveyor pipe (2) is rotatably equipped with two rotating rods (207) and one rotating rod (208). Gears are installed at the outer ends of the rotating rod (208) and the two rotating rods (207). The gears at the outer ends of the two rotating rods (207) mesh with the gears at the outer ends of the rotating rod (208). The rotating rod (208) is located at the two rotating rods (207). A servo motor is installed on the outer side of the conveyor pipe (2). The output end of the servo motor is connected to the other outer end of the rotating rod (208).

9. The pneumatic conveying and adding device for new sand in the wet-sand mixing machine according to claim 8, characterized in that, Crushing components (209) are installed on the outer side of the first rotating rod (207) at both locations; a material-pushing plate (2010) is installed on the outer side of the second rotating rod (208); the material-pushing plate (2010) and the crushing components (209) are rotatably installed on the inner side of the conveyor pipe (2).

10. The pneumatic conveying and adding device for new sand in a wet sand mixer according to claim 9, characterized in that, Sealing plate three (308) is installed at the bottom of sealing plate two (307); sealing plate four (309) is installed at the top of traction plate two (303); the guide pipe (102) is provided with a slot, wherein sealing plate one (304), sealing plate two (307), sealing plate three (308) and sealing plate four (309) are slidably installed in the slot on the guide pipe (102).

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