Quartz sand circulating crushing device

Abstract

The invention relates to the technical field of quartz sand crushing, in particular to a quartz sand circulating crushing device which comprises a main frame and a digital display control panel, a crushing shell is arranged on the main frame in an overturning mode, and two tooth rollers matched with each other in a crushing mode are arranged in the crushing shell. Each tooth roller is independently driven by a roller driving structure arranged on the main frame; a material receiving structure capable of abutting against a lower end opening of the crushing shell for sealing is arranged below the crushing shell, an upper air draft structure capable of abutting against an upper end opening of the crushing shell for sealing is arranged above the crushing shell, and the upper air draft structure can extract gas in the crushing shell, filter and heat the gas and then send the gas into the crushing shell again through the material receiving structure; the overturning driving structure is used for driving the crushing shell to overturn, so that substandard coarse materials can enter the crushing procedure again without an additional transfer mechanism, the overall structure of the equipment is simplified, the intermediate transfer link is reduced, the cyclic crushing period is shortened, and the occupied area of the equipment is also reduced.

Description

Technical Field

[0001] This invention relates to the field of quartz sand crushing technology, specifically to a quartz sand circulating crushing device. Background Technology

[0002] The applications of quartz sand, such as photovoltaic glass, electronic-grade silicon, building aggregate, and water treatment filter media, directly determine the requirements for its particle size range and particle size distribution uniformity. Single crushing cannot achieve this goal. Single crushing is prone to producing polarized particles, either coarse particles that do not reach the target particle size or over-crushed fine powder, neither of which meets the usage standards.

[0003] A quartz sand circulating crushing device with publication number CN221602071U includes a box body, a feed hopper at the top of the box body, a first screen plate inside the box body, a crushing chamber and a feeding chamber above the first screen plate by a partition, two crushing rollers mounted below the guide plate by a mounting base, a screw feeder inside the feeding chamber, a collecting hopper below the first screen plate, and a grinding cylinder connected to the bottom of the collecting hopper.

[0004] A high-efficiency multi-circulation crushing device for quartz sand production, disclosed in CN213914068U, includes a frame, a crushing device, and a circulation device. The crushing device is located inside the frame, and the circulation device is located on the side of the frame. The crushing device includes a breaker hammer and an impact plate. Multiple impact plates are arranged on the side of the breaker hammer, and the impact plates are configured in cooperation with the breaker hammer.

[0005] Current circulating crushing devices mostly use additional coarse material transfer mechanisms, which occupy a large area and have high external exposure, making it difficult to seal and dry the airflow inside the crushing shell. Summary of the Invention

[0006] (a) Technical problems to be solved The purpose of this invention is to provide a quartz sand recycling crushing device in order to solve the above-mentioned problems.

[0007] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a quartz sand circulating crushing device, including a main frame and a digital display control panel. A crushing shell is flipped on the main frame, and two toothed rollers that cooperate with each other for crushing are provided in the crushing shell. Each toothed roller is independently driven by a roller drive structure set on the main frame. The crushing shell is provided with a receiving structure at the bottom that can be sealed to its lower port, and an upper exhaust structure is provided at the top that can be sealed to its upper port. The upper exhaust structure can extract the gas inside the crushing shell and, after filtration and heating, send it back into the crushing shell through the receiving structure. The crushing shell has a feed inlet near both of its ends, and each feed inlet has an opening and closing door structure. The main frame is equipped with a feeding and conveying mechanism that can cooperate with the feed inlet located above to feed material into the crushing shell. Both ends of the crushing shell are equipped with a screening structure for screening materials.

[0008] Furthermore, the receiving structure includes a receiving hopper, a receiving box is provided below the receiving hopper, a material passage groove is provided on the upper side of the receiving box for sliding up and down in cooperation with the lower port of the receiving hopper, and the receiving box is provided with two or more first electric telescopic rods for driving the receiving hopper to move up and down.

[0009] Furthermore, the upper exhaust structure includes an exhaust hood, and the main frame is provided with a lifting drive structure for driving the exhaust hood to move up and down. A filter, a vacuum pump, and an air heater are respectively provided on one side of the main frame. A ventilation pipe is provided between the filter, the vacuum pump, and the air heater to enable sequential air flow. The air inlet of the filter is connected to the exhaust hood through the upper exhaust pipe, and the air outlet of the air heater is connected to the receiving hopper through the lower exhaust pipe. A bottom support frame is provided on the bottom side of the air heater.

[0010] Furthermore, the lifting drive structure includes lifting brackets fixedly installed on both sides of the exhaust hood. The main frame is provided with a third electric telescopic rod for driving the lifting brackets to move up and down. Two fourth guide rods are symmetrically distributed on both sides of the third electric telescopic rod with the third electric telescopic rod as the center. The upper end of the fourth guide rod is fixedly connected to the lifting bracket, and the lower end of the fourth guide rod is slidably connected to the fourth guide hole opened at the corresponding position on the main frame.

[0011] Furthermore, the opening and closing door structure includes a door body disposed at the feed inlet, a cylinder for driving the door body to move is fixedly disposed on the crushing shell, the door body is provided with a first lug, and the push rod head of the cylinder is fixedly connected to the first lug. When the push rod of the cylinder reaches its maximum stroke, the door body can achieve the closing and sealing of the feed inlet, and when the push rod of the cylinder reaches its minimum stroke, the door body can achieve the complete opening of the feed inlet.

[0012] Furthermore, the roller drive structure includes a first motor, the output shaft of the first motor is provided with a first reducer, and a pulley transmission mechanism is provided between the output shaft of the first reducer and the shaft end of the corresponding toothed roller.

[0013] Furthermore, the main frame is provided with a flipping drive structure for driving the crushing shell to flip up and down. The flipping drive structure includes flipping brackets that are fixedly installed on both sides of the crushing shell. The flipping brackets are rotatably connected to the main frame through flipping shafts. The shaft end of one of the flipping shafts is driven to rotate by a second motor fixedly installed on the main frame. A second reducer is provided between the output shaft end of the second motor and the shaft end of the flipping shaft.

[0014] Furthermore, the feeding and conveying mechanism includes a frame with a conveyor belt on it. A second electric telescopic rod for driving its movement is provided on the lower side of the frame. The second electric telescopic rod is fixedly mounted on the main frame by a fixed seat. Two or more second guide rods are symmetrically distributed on both sides of the second electric telescopic rod with the rod as the center. One end of the second guide rod is fixedly connected to the frame, and the other end of the second guide rod is slidably connected to the second guide sliding hole opened at the corresponding position on the main frame.

[0015] Furthermore, the screening structure includes a screen frame with a cuboid shape, and a plurality of screening shafts evenly distributed along an arc shape are provided inside the screen frame. A third guide rod is fixedly connected to each of the four corners of the screen frame. The axes of each of the third guide rods are parallel to each other. The ends of the third guide rods are slidably connected to the third guide sliding holes opened at corresponding positions on the crushing shell. The crushing shell is provided with a screening drive structure for driving the screen frame to reciprocate along the axis of the third guide rods.

[0016] Furthermore, the screening drive structure includes a wheel rod, one end of which is fixedly connected to the screen frame, and the other end of which is rotatably connected to a stop wheel. One side of the stop wheel rolls against a deflection wheel, and a third motor for driving the deflection wheel to rotate is fixedly provided on the crushing shell. A seat cylinder is fixedly provided on the crushing shell, and a guide post is fixedly provided on the screen frame. One end of the guide post is slidably connected to the seat cylinder, and a spring is provided between the end of the guide post inside the seat cylinder and the inner end face of the seat cylinder. The sliding direction of the guide post inside the seat cylinder is consistent with the axial direction of the third guide rod.

[0017] (III) Beneficial Effects Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By using a flipping drive structure to flip the crushing shell, substandard coarse materials can re-enter the crushing process without additional transfer mechanisms, simplifying the overall structure of the equipment, reducing intermediate transfer links, shortening the cycle crushing period, and reducing the equipment footprint. 2. The air heater in the upper exhaust structure can heat the circulating airflow. The hot airflow continuously acts on the quartz sand in the crushing shell in the closed loop formed by the crushing shell, the receiving structure and the upper exhaust structure. The airflow can be reused, reducing energy consumption. It can effectively dry the wet material, prevent the wet material from sticking to the toothed roller or clogging the screening gap, avoid the moisture content exceeding the standard and affecting the quality of the finished product, and further improve the applicability of the quartz sand finished product. 3. The feeding and conveying mechanism drives the frame to move via the second electric telescopic rod, which can connect with the upper feed port. The opening and closing door structure drives the door body via a cylinder to achieve complete opening and sealing of the feed port, which not only avoids material accumulation and blockage during feeding, but also prevents dust leakage and air leakage during crushing and airflow circulation, ensuring smooth connection between each process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is the present invention. Figure 1 A schematic diagram of the right-side view structure; Figure 3 This is the present invention. Figure 1 A schematic diagram of the three-dimensional structure in the first direction; Figure 4 This is the present invention. Figure 1 A schematic diagram of the AA cross-sectional structure; Figure 5 This is the present invention. Figure 1 A schematic diagram of the second-direction three-dimensional structure; Figure 6 This is the present invention. Figure 5 A magnified schematic diagram of the structure at point B; Figure 7 This is the present invention. Figure 5 A magnified schematic diagram of the structure at point C; Figure 8 This is a schematic cross-sectional view of the screening structure of the present invention.

[0020] The reference numerals in the attached drawings are explained as follows: 1. Main frame; 2. Crushing shell; 201. Feed inlet; 202. Liner plate; 3. Receiving structure; 301. Receiving hopper; 302. First electric telescopic rod; 303. Receiving box; 304. First guide rod; 4. Upper exhaust structure; 401. Exhaust hood; 402. Vacuum pump; 403. Filter; 404. Upper exhaust pipe; 405. Lower exhaust pipe; 406. Bottom support frame; 407. Air heater; 5. Opening and closing door structure; 501. Door body; 502. Cylinder; 503. First support lug; 6. Roller drive structure; 601. First motor; 602. First reducer; 603. Pulley transmission mechanism; 7. Tilting drive structure; 701. Second motor; 702. First... 703. Reducer; 704. Tilting bracket; 705. Tilting shaft; 8. Feeding and conveying mechanism; 806. Conveyor belt; 807. Second electric telescopic rod; 808. Frame; 809. Second support lug; 8000. Fixed seat; 8001. Second guide rod; 801. Support roller; 902. Screening structure; 903. Third motor; 900. Deflector wheel; 900. Screen frame; 901. Screening shaft; 902. Third guide rod; 903. Wheel rod; 904. Abutment wheel; 905. Seat cylinder; 906. Spring; 910. Guide column; 11. Digital display control panel; 12. Lifting drive structure; 1101. Lifting bracket; 1102. Third electric telescopic rod; 1103. Fourth guide rod; 13. Conveyor; 14. Toothed roller. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] See Figures 1-8As shown, this invention provides a quartz sand circulating crushing device, including a main frame 1 and a digital display control panel 10. A crushing shell 2 is mounted on the main frame 1, and an inner liner 202 is provided on the inner side of the crushing shell 2 for guiding material between two toothed rollers 13. A flipping drive structure 7 is provided on the main frame 1 for driving the crushing shell 2 to flip up and down. Two toothed rollers 13 are provided inside the crushing shell 2 for crushing and cooperating with each other. The toothed rollers 13 adopt existing technology, which is well known to those skilled in the art. For example, trapezoidal teeth or sharp teeth, fine rectangular teeth or sawtooth shapes, etc., can be used. A suitable tooth shape can be selected according to the size of the quartz sand to be crushed. Each toothed roller 13 is independently driven by a roller drive structure 6 mounted on the main frame 1. A material receiving structure 3 is provided below the crushing shell 2, which can abut and seal with its lower port. The crushing shell 2 is provided with an upper exhaust structure 4 that can seal against its upper port. The upper exhaust structure 4 can extract the gas in the crushing shell 2 and, after filtration and heating, send it back into the crushing shell 2 through the receiving structure 3. The crushing shell 2 is provided with a feed port 201 near its two ports. Each feed port 201 is provided with an opening and closing door structure 5. The main frame 1 is provided with a feeding and conveying mechanism 8 that can cooperate with the upper feed port 201 to feed material into the crushing shell 2. Both ports of the crushing shell 2 are provided with a screening structure 9 for screening materials.

[0023] See instruction manual attached Figure 4 and Figure 5As shown, the receiving structure 3 includes a receiving hopper 301. In practical applications, the upper side of the receiving hopper 301 is arc-shaped, and the two ends of the crushing shell 2 are also arc-shaped with the center of the arc located on the rotation axis of the crushing shell 2. This allows the crushing shell 2 to be rotated with minimal separation between the receiving hopper 301 and the crushing shell 2 without causing interference. The lower side of the exhaust hood 401 is also arc-shaped. A receiving box 303 is provided below the receiving hopper 301. A qualified-sized quartz sand conveyor for dropping from the receiving hopper 301 passes through the receiving box 303. The conveyor 12 for transporting materials has a material passage trough on the upper side of the receiving box 303 for sliding up and down in cooperation with the lower port of the receiving hopper 301. The receiving box 303 is provided with two or more first electric telescopic rods 302 for driving the receiving hopper 301 to move up and down. Each first electric telescopic rod 302 has two first guide rods 304 symmetrically distributed on both sides with the first guide rod 304 as the center. The lower end of the first guide rod 304 is fixedly connected to the receiving box 303, and the upper end of the first guide rod 304 is slidably connected to the first guide sliding hole opened at the corresponding position of the receiving hopper 301. Through the above-mentioned specific structural design, when the crushing shell 2 has completed its flipping and needs to be further crushed or circulated, the receiving hopper 301 is driven to rise, so that its upper port abuts and seals with the lower port of the crushing shell 2, preventing material leakage or leakage of circulating air during the crushing process. When it is necessary to flip the crushing shell 2 to transfer the coarse material remaining in the shell to the upper part for re-crushing, the receiving hopper 301 is driven to fall, so that it separates from the lower port of the crushing shell 2, providing sufficient space for the crushing shell 2 to flip and avoiding structural interference.

[0024] See instruction manual attached Figure 1 , Figure 2 and Figure 3As shown, the upper exhaust structure 4 includes an exhaust hood 401. The main frame 1 is provided with a lifting drive structure 11 for driving the exhaust hood 401 to move up and down. A filter 403, a vacuum pump 402 and an air heater 407 are respectively provided on one side of the main frame 1. A ventilation pipe for sequential air conduction is provided between the filter 403, the vacuum pump 402 and the air heater 407. The air inlet of the filter 403 is connected to the exhaust hood 401 through the upper exhaust pipe 404. The air outlet of the air heater 407 is connected to the receiving hopper 301 through the lower exhaust pipe 405. A bottom support frame 406 is provided on the bottom side of the air heater 407. Both the upper exhaust pipe 404 and the lower exhaust pipe 405 are flexible pipes. Through the above-described structural design, powered by a vacuum pump 402, and through the synergistic action of the exhaust hood 401, upper exhaust pipe 404, filter 403, ventilation pipe, air heater 407, and lower exhaust pipe 405, a closed airflow loop connecting the inside and outside components of the crushing shell 2 is constructed. This avoids dust pollution caused by gas leakage and enables airflow reuse, reducing energy consumption. The filter 403 traps fine quartz sand powder in the gas, ensuring safe equipment operation and environmental cleanliness. The air heater 407 heats the airflow, drying the quartz sand inside the crushing shell, solving the problems of wet material adhesion and excessive moisture content, improving crushing and screening efficiency, and ensuring the quality of the finished quartz sand. See instruction manual attached Figure 1 and Figure 3 As shown, the lifting drive structure 11 includes lifting brackets 1101 fixedly mounted on both sides of the exhaust hood 401. The main frame 1 is equipped with a third electric telescopic rod 1102 for driving the lifting brackets 1101 up and down. Two fourth guide rods 1103 are symmetrically distributed on both sides of the third electric telescopic rod 1102, with the upper end of the fourth guide rod 1103 fixedly connected to the lifting bracket 1101, and the lower end of the fourth guide rod 1103 slidably connected to a fourth guide hole opened at a corresponding position on the main frame 1. By adjusting the position of the exhaust hood 401 using the lifting drive structure 11, a sealed connection can be achieved during crushing and airflow treatment, ensuring functional effectiveness. Furthermore, separation and avoidance can be achieved when the crushing shell 2 is flipped, without affecting the secondary crushing cycle of the coarse material, ensuring the continuity and operational stability of the entire crushing device.

[0025] See instruction manual attached Figure 5 and Figure 7As shown, the opening and closing door structure 5 includes a door body 501 located at the feed inlet 201. A cylinder 502 for driving the door body 501 to move is fixedly installed on the crushing shell 2. The door body 501 is provided with a first lug 503. The push rod head of the cylinder 502 is fixedly connected to the first lug 503. When the push rod of the cylinder 502 reaches its maximum stroke, the door body 501 can achieve a closed seal on the feed inlet 201. When the push rod of the cylinder 502 reaches its minimum stroke, the door body 501 can achieve a complete opening on the feed inlet 201. In practical applications, when the door body 501 covers the feed inlet 201, it blocks the communication between the inside of the crushing shell 2 and the external environment, preventing the quartz sand dust inside the crushing shell 2 from leaking out during the crushing process and avoiding environmental pollution. At the same time, it ensures the sealing of the inside of the crushing shell 2, providing sealing conditions for the upper exhaust structure 4 to achieve functions such as airflow circulation, heating and drying, and preventing airflow leakage from the feed inlet 201 from affecting the processing effect. When the gate 501 is far away from the feed inlet 201, the feed channel is fully open, which facilitates the feeding and conveying mechanism 8 to smoothly feed the quartz sand raw material into the crushing shell 2, ensuring a smooth feeding process and preventing material accumulation or blockage. The opening and closing action of the gate 501 can be coordinated with the feeding and conveying mechanism 8 and the flipping action of the crushing shell 2. The feed inlet can be quickly opened when feeding is needed, and the feed inlet can be reliably closed when crushing or the shell is flipped, without affecting the overall process continuity of the quartz sand recycling crushing and improving the efficiency of the automated operation of the device.

[0026] See instruction manual attached Figure 2 and Figure 3 As shown, the roller drive structure 6 includes a first motor 601, with a first reducer 602 at the output shaft end of the first motor 601. A pulley drive mechanism 603 is provided between the output shaft end of the first reducer 602 and the shaft end of the corresponding toothed roller 13. The pulley drive mechanism 603 consists of two pulleys and a drive belt between the two pulleys. One pulley is connected to the output shaft end of the first reducer 602, and the other pulley is connected to the shaft end of the corresponding toothed roller 13.

[0027] See instruction manual attached Figure 1 and Figure 4As shown, the tilting drive structure 7 includes tilting brackets 703 fixedly mounted on both sides of the crushing shell 2. Each tilting bracket 703 is rotatably connected to the main frame 1 via a tilting shaft 704. One of the tilting shafts 704 is driven to rotate by a second motor 701 fixedly mounted on the main frame 1. A second reducer 702 is provided between the output shaft of the second motor 701 and the shaft of the tilting shaft 704. In practical applications, as a key component of the cyclic crushing process, the tilting drive structure 7's function of tilting the crushing shell 2 solves the problem of insufficient material yield in a single crushing operation. This allows substandard coarse material to repeatedly enter the crushing process until the particle size meets requirements, improving the pass rate and particle size uniformity of the finished quartz sand. Furthermore, it eliminates the need for an additional coarse material transfer mechanism, simplifying the equipment structure and improving crushing efficiency.

[0028] See instruction manual attached Figure 2 , Figure 4 and Figure 6 As shown, the feeding and conveying mechanism 8 includes a frame 803, on which a conveyor belt 801 is provided. A second electric telescopic rod 802 for driving its movement is provided on the lower side of the frame 803. The second electric telescopic rod 802 is fixedly mounted on the main frame 1 by a fixing seat 805. Two or more second guide rods 806 are symmetrically distributed on both sides of the second electric telescopic rod 802 with the second guide rod 802 as the center. One end of the second guide rod 806 is fixedly connected to the frame 803, and the other end of the second guide rod 806 is slidably connected to the second guide sliding hole opened at the corresponding position of the main frame 1.

[0029] See instruction manual attached Figure 1 , Figure 2 , Figure 3 and Figure 8As shown, the screening structure 9 includes a screen frame 903 with a rectangular shape. The screen frame 903 is provided with a number of screening shafts 904 evenly distributed along an arc. A third guide rod 905 is fixedly connected to each of the four corners of the screen frame 903. The axes of each third guide rod 905 are parallel to each other. The ends of the third guide rods 905 are slidably connected to the third guide sliding holes opened at corresponding positions in the crushing shell 2. The crushing shell 2 is provided with a screening drive structure for driving the screen frame 903 to reciprocate along the axis of the third guide rods 905. The screening drive structure includes a wheel rod 906, one end of which is fixedly connected to the screen frame 903, and the other end of which is rotatably connected to a stop wheel 907. One side of the stop wheel 907 rolls against a deflection wheel 902. A third motor 901 for driving the deflection wheel 902 to rotate is fixedly installed on the crushing housing 2. A seat cylinder 908 is fixedly installed on the crushing housing 2, and a guide post 910 is fixedly installed on the screen frame 903. One end of the guide post 910 is slidably connected to the seat cylinder 908, and a spring 909 is provided between the end of the guide post 910 inside the seat cylinder 908 and the inner end face of the seat cylinder 908. The sliding direction of the guide post 910 inside the seat cylinder 908 is consistent with the axial direction of the third guide rod 905. In practical applications, the third motor 901 is used as the power source. Through the power transmission of the deflection wheel 902, the abutment wheel 907, and the wheel rod 906, combined with the reset action of the spring 909, the screen frame 903 is driven to move smoothly back and forth along the axial direction of the third guide rod 905, avoiding material blockage in the screening gap and improving screening efficiency. Substandard coarse materials are separated through screening. These coarse materials remain in the crushing shell 2. After the flipping drive structure 7 flips the crushing shell 2, they re-enter the crushing area of ​​the toothed roller 13 for secondary crushing, forming a cycle of "crushing, screening, and re-crushing." This solves the problem of polarized particles easily generated in single crushing, eliminates the need for additional coarse material transfer equipment, simplifies the device structure, and reduces energy consumption.

[0030] The output terminals of the digital display control panel 10 are electrically connected to the input terminals of the first electric telescopic rod 302, vacuum pump 402, air heater 407, cylinder 502, first motor 601, second motor 701, second electric telescopic rod 802, third motor 901, and third electric telescopic rod 1102, respectively.

[0031] Working principle and technical effects of the present invention: In use, the second electric telescopic rod 802 of the feeding and conveying mechanism 8 drives the frame 803 and the conveyor belt 801 to move to the feed inlet 201 above the crushing shell 2. The cylinder 502 of the opening and closing door structure 5 drives the door 501 to open. The conveyor belt 801 feeds the quartz sand raw material into the crushing shell 2, and then the door 501 closes and seals. The first motor 601 of the roller drive structure 6 drives the two toothed rollers 13 to rotate at a relative differential speed via the first reducer 602 and the pulley transmission mechanism 603, crushing the quartz sand raw material in the crushing shell 2. During the crushing process, the screening structure 9 located in the lower port of the crushing shell 2 operates, and the third motor 901 drives the deflection wheel 902 to rotate. Under the elastic reset cooperation of the spring 909, the abutment wheel 907, the wheel rod 906 and the screen frame 903 move back and forth along the axial direction of the third guide rod 905. The screening shaft 904 in the screen frame 903 screens the material. The material that meets the particle size requirements falls into the receiving hopper 301 of the receiving structure 3 below through the screening structure, and then enters the receiving box 303 for collection. The coarse material that does not meet the particle size requirements is retained. Inside the housing, coarse materials that do not meet the particle size requirements are flipped from bottom to top by the up-and-down flipping of the crushing housing 2. Specifically, the second motor 701 of the flipping drive structure 7 drives the crushing housing 2 to flip 180 degrees around the main frame 1 via the second reducer 702 and the flipping shaft 704. After flipping, the first electric telescopic rod 302 drives the upper side of the receiving hopper 301 to seal and connect with the lower port of the crushing housing 2. The lifting drive structure 11 drives the exhaust hood 401 of the upper exhaust structure 4 to descend and seal and connect with the upper port of the crushing housing 2. During the next flipping, the upper side of the receiving hopper 301 is separated from the lower port of the crushing housing 2, and the exhaust hood 401 rises and separates from the upper port of the crushing housing 2, thus realizing the up-and-down flipping of the crushing housing 2.

[0032] When hot air is blown into the inside of the crushing shell 2 for drying, the vacuum pump 402 of the upper exhaust structure 4 is started. The gas inside the crushing shell is extracted through the exhaust hood 401 and the upper exhaust pipe 404. After impurities are filtered by the filter 403, the gas is heated by the air heater 407 and then sent back to the crushing shell 2 through the lower exhaust pipe 405. This saves energy and maintains the airflow circulation inside the shell.

[0033] The above description is merely a specific embodiment 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 quartz sand circulating crushing device, characterized in that: Includes a main frame (1) and a digital display control panel (10). The main frame (1) is provided with a crushing shell (2) which is flipped up. The crushing shell (2) is provided with two toothed rollers (13) that cooperate with each other for crushing. Each toothed roller (13) is independently driven by a roller drive structure (6) provided on the main frame (1). The crushing shell (2) is provided with a receiving structure (3) that can be sealed to its lower port, and the crushing shell (2) is provided with an upper exhaust structure (4) that can be sealed to its upper port. The upper exhaust structure (4) can extract the gas in the crushing shell (2), filter and heat it, and then send it back into the crushing shell (2) through the receiving structure (3). The crushing shell (2) has a feed inlet (201) near both of its ports. Each feed inlet (201) has an opening and closing door structure (5). The main frame (1) has a feeding and conveying mechanism (8) that can cooperate with the feed inlet (201) located above to feed material into the crushing shell (2). Both ports of the crushing shell (2) have a screening structure (9) for screening materials.

2. The quartz sand circulating crushing device according to claim 1, characterized in that: The receiving structure (3) includes a receiving hopper (301), and a receiving box (303) is provided below the receiving hopper (301). A material passage groove is provided on the upper side of the receiving box (303) for sliding up and down in cooperation with the lower port of the receiving hopper (301). The receiving box (303) is provided with two or more first electric telescopic rods (302) for driving the receiving hopper (301) to move up and down.

3. The quartz sand circulating crushing device according to claim 1, characterized in that: The upper exhaust structure (4) includes an exhaust hood (401). The main frame (1) is provided with a lifting drive structure (11) for driving the exhaust hood (401) to move up and down. A filter (403), a vacuum pump (402) and an air heater (407) are respectively provided on one side of the main frame (1). A ventilation pipe for sequential air conduction is provided between the filter (403), the vacuum pump (402) and the air heater (407). The air inlet of the filter (403) is connected to the exhaust hood (401) through the upper exhaust pipe (404). The air outlet of the air heater (407) is connected to the receiving hopper (301) through the lower exhaust pipe (405). A bottom support frame (406) is provided on the bottom side of the air heater (407).

4. The quartz sand circulating crushing device according to claim 3, characterized in that: The lifting drive structure (11) includes lifting brackets (1101) fixedly installed on both sides of the exhaust hood (401). The main frame (1) is provided with a third electric telescopic rod (1102) for driving the lifting brackets (1101) to move up and down. The third electric telescopic rod (1102) is provided with two fourth guide rods (1103) symmetrically distributed on both sides of it. The upper end of the fourth guide rod (1103) is fixedly connected to the lifting bracket (1101), and the lower end of the fourth guide rod (1103) is slidably connected to the fourth guide hole opened at the corresponding position of the main frame (1).

5. The quartz sand circulating crushing device according to claim 1, characterized in that: The opening and closing door structure (5) includes a door body (501) set at the feed inlet (201). A cylinder (502) for driving the door body (501) to move is fixed on the crushing shell (2). A first lug (503) is provided on the door body (501). The push rod head of the cylinder (502) is fixedly connected to the first lug (503). When the push rod of the cylinder (502) reaches the maximum stroke, the door body (501) can achieve the closing and sealing of the feed inlet (201). When the push rod of the cylinder (502) reaches the minimum stroke, the door body (501) can achieve the complete opening of the feed inlet (201).

6. The quartz sand circulating crushing device according to claim 1, characterized in that: The roller drive structure (6) includes a first motor (601), the output shaft end of the first motor (601) is provided with a first reducer (602), and a pulley transmission mechanism (603) is provided between the output shaft end of the first reducer (602) and the shaft end of the corresponding toothed roller (13).

7. The quartz sand circulating crushing device according to claim 1, characterized in that: The main frame (1) is provided with a flipping drive structure (7) for driving the crushing shell (2) to flip up and down. The flipping drive structure (7) includes flipping brackets (703) fixedly installed on both sides of the crushing shell (2). The flipping brackets (703) are rotatably connected to the main frame (1) through flipping shafts (704). The shaft end of one of the flipping shafts (704) is driven to rotate by a second motor (701) fixedly installed on the main frame (1). A second reducer (702) is provided between the output shaft end of the second motor (701) and the shaft end of the flipping shaft (704).

8. The quartz sand circulating crushing device according to claim 1, characterized in that: The feeding and conveying mechanism (8) includes a frame (803), a conveyor belt (801) is provided on the frame (803), and a second electric telescopic rod (802) for driving its movement is provided on the lower side of the frame (803). The second electric telescopic rod (802) is fixedly mounted on the main frame (1) by a fixing seat (805). Two or more second guide rods (806) are symmetrically distributed on both sides of the second electric telescopic rod (802) with the second guide rod (806) as the center. One end of the second guide rod (806) is fixedly connected to the frame (803), and the other end of the second guide rod (806) is slidably connected to the second guide sliding hole opened at the corresponding position of the main frame (1).

9. The quartz sand circulating crushing device according to claim 1, characterized in that: The screening structure (9) includes a screen frame (903) in the shape of a cuboid. The screen frame (903) is provided with a number of screening shafts (904) evenly distributed along an arc. The four corners of the screen frame (903) are respectively fixedly connected with third guide rods (905). The axial directions of each third guide rod (905) are parallel to each other. The ends of the third guide rods (905) are slidably connected to the third guide sliding holes opened at corresponding positions in the crushing shell (2). The crushing shell (2) is provided with a screening drive structure for driving the screen frame (903) to reciprocate along the axial direction of the third guide rods (905).

10. The quartz sand circulating crushing device according to claim 9, characterized in that: The screening drive structure includes a wheel rod (906), one end of which is fixedly connected to the screen frame (903), and the other end of which is rotatably connected to a stop wheel (907). A deflection wheel (902) is rolled against one side of the stop wheel (907). A third motor (901) for driving the deflection wheel (902) to rotate is fixedly provided on the crushing shell (2). A seat cylinder (908) is fixedly provided on the crushing shell (2), and a guide post (910) is fixedly provided on the screen frame (903). One end of the guide post (910) is slidably connected to the seat cylinder (908), and a spring (909) is provided between the end of the guide post (910) inside the seat cylinder (908) and the inner end face of the seat cylinder (908). The sliding direction of the guide post (910) inside the seat cylinder (908) is consistent with the axial direction of the third guide rod (905).

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