Quartz sand screening device with multi-stage screening function

Abstract

The invention discloses a quartz sand screening device with a multi-stage screening function, and relates to the technical field of quartz sand screening, the quartz sand screening device with the multi-stage screening function comprises a screening cylinder, a feeding pipe is installed at the top of the screening cylinder, a discharging pipe is installed at the bottom of the screening cylinder, and two circular rails are fixedly installed in the screening cylinder; rotating rings are rotatably mounted on the two circular rails, a coarse screen curved net is mounted on one rotating ring, a fine screen curved net is mounted on the other rotating ring, and when quartz sand needs to be screened, the quartz sand is conveyed into the screening barrel through a feeding pipe; and the quartz sand can be subjected to multi-stage screening through the coarse screening curved net and the fine screening curved net which are arranged up and down, and the screening accuracy of the quartz sand can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of quartz sand screening, in particular to a quartz sand screening device with a multi-stage screening function. Background Art

[0002] Quartz is one of the most widely distributed minerals on the earth's surface. There are many types of quartz. The raw materials used for daily ceramics include vein quartz, quartz sand, quartzite, sandstone, silica, opal, diatomaceous earth, etc. Quartz sand is a quartz particle processed by quartz stone through crushing, screening and other processes. The main component is silicon dioxide. It is a hard, wear-resistant, and chemically stable silicate mineral. Quartz sand has stable chemical properties, is insoluble in acid (but slightly soluble in KOH solution), has a melting point of up to 1750℃, has high refractory properties, and has a density of 2.65 g / cm3. It is usually milky white or colorless and translucent, with an oily luster. Quartz sand is widely used in many industrial fields.

[0003] A Chinese patent (publication number: CN110152998A) discloses a high-efficiency screening device for quartz sand production. The device can select the size of the sieve holes on the sieve plate according to the required quartz sand particle size, so as to screen out quartz sand that meets the needs of the enterprise, with high screening efficiency. The selected sieve plate is threadedly connected and fixed with a first screw hole and a second screw hole by bolts, and the sieve plate is easy to install and disassemble; the quartz sand enters the box body from the feed inlet, and the partition can isolate the quartz sand between the two partitions, thereby cooperating with the sieve holes to discharge the screened quartz sand through the discharge port, thereby improving the discharge effect.

[0004] When screening quartz sand, the existing quartz sand screening device mostly filters the quartz sand through a single screen, and does not have a multi-stage screening function, resulting in different specifications of the screened quartz sand, which affects the accuracy of screening. Summary of the invention

[0005] The object of the present invention is to provide a quartz sand screening device with a multi-stage screening function to solve the problems raised in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: the quartz sand screening device with multi-stage screening function comprises a screening drum, a feed pipe is installed on the top of the screening drum, and a discharge pipe is installed on the bottom of the screening drum, two ring rails are fixedly installed in the screening drum, and rotating rings are rotatably installed on the two ring rails, a coarse screen curved net is installed on one rotating ring, and a fine screen curved net is installed on the other rotating ring, a driving motor is installed on the screening drum, and a transmission shaft is installed on the output shaft of the driving motor, a through hole is opened on the top of the screening drum, and the transmission shaft passes through the through hole, and a through hole is installed on the bottom of the transmission shaft. A transmission block is provided, and the transmission block is connected to a swivel through a linkage rod, and the two swivels are connected through a connecting rod. When quartz sand needs to be screened, the quartz sand is transported to the screening cylinder through a feed pipe, and the quartz sand can be screened in multiple stages through the coarse screen curved mesh and the fine screen curved mesh arranged up and down, thereby improving the screening accuracy of the quartz sand. At the same time, starting the driving motor can drive the coarse screen curved mesh and the fine screen curved mesh to rotate through the transmission shaft, the linkage rod and the connecting rod, thereby preventing the quartz sand from accumulating on the coarse screen curved mesh and the fine screen curved mesh, thereby improving the screening efficiency of the quartz sand.

[0007] Furthermore, a first discharge valve is installed on the coarse screen curved net, a second discharge valve is installed on the fine screen curved net, a conveying elevator and a crusher are installed on the screening cylinder, a rotary joint is installed on the second discharge valve, the rotary joint is connected to the input end of the conveying elevator through a conveying pipe, the output end of the conveying elevator is connected to the input end of the crusher through a discharge pipe, and the output end of the crusher is connected to the top of the screening cylinder through a discharge pipe. When the quartz sand is screened in the screening cylinder, the first discharge valve and the second discharge valve are started, so that the quartz sand retained on the coarse screen curved net and the fine screen curved net can be allowed to enter the conveying elevator through the conveying pipe. By starting the conveying elevator and the crusher, the crusher can crush the over-specification quartz sand again, and then transport it back to the screening cylinder through the discharge pipe for further screening.

[0008] Furthermore, the screening cylinder is provided with a screening and utilizing component and a screening and enhancing component, and the rotation of the transmission shaft provides operating driving force for the screening and utilizing component and the screening and enhancing component.

[0009] Further, the screening and utilization assembly includes a driving wheel, a driven wheel, a transmission belt, a rotating column, an annular slideway, a working cylinder, a piston, a sliding rod, a sliding hole, a connecting plate and a driving shaft; The top of the two working cylinders are provided with pistons slidably mounted, and the sliding rods are installed on the pistons. The tops of the two working cylinders are provided with sliding holes, the sliding rods pass through the sliding holes, and a connecting plate is installed on the top of the sliding rod, and a driving shaft is rotatably mounted on the connecting plate, and the two driving shafts are both inserted in the annular slideway. When the transmission shaft rotates, the transmission shaft can drive the driving wheel to rotate synchronously, and the pulley transmission member composed of the driving wheel, the transmission belt and the driven wheel can drive the rotating column to rotate. The extrusion force of the annular slideway on the driving shaft during the rotation of the rotating column can be used to realize that the driving shaft drives the piston in the working cylinder to reciprocate through the connecting plate and the sliding rod.

[0010] Furthermore, one of the drive shafts is inserted at the lowest point of the annular slideway, and the other drive shaft is inserted at the highest point of the annular slideway. By setting the height of the two drive shafts, the two working cylinders can be operated alternately, thereby achieving continuous adsorption of the screening cylinder.

[0011] Furthermore, an air intake pipe is installed on the input ends of the two working cylinders, and the two air intake pipes are connected through a merger, and the merger is connected to the upper part of the screening cylinder through an air intake pipe. A purifier is installed on the screening cylinder, and the output ends of the two working cylinders are connected to the purifier through an air supply pipe. When the piston moves downward along with the driving shaft, a negative pressure adsorption force can be formed in the working cylinder as the piston moves downward, so that the working cylinder can absorb the dust in the screening cylinder through the air intake pipe and the air intake pipe to achieve the dust removal effect. When the piston moves upward, the dust-containing gas in the working cylinder can enter the purifier through the air supply pipe as the piston moves upward, which is convenient for purifying the dust-containing gas and can avoid pollution to the surrounding environment.

[0012] Furthermore, the air inlet pipe, air suction pipe and air delivery pipe are all one-way pipes.

[0013] Further, the screening enhancement assembly includes a rotating disk, a chamber, a perforation, a slide plate, a fan plate, a squeeze ball, a fixed block, a moving rod, a force-bearing ball, an impact rubber head and a flexible spring sheet; A turntable is installed on the transmission shaft, and a plurality of chambers are provided in the turntable. A plurality of the chambers are provided with perforations on the side away from the transmission shaft. A plurality of slide plates are slidably installed in the chambers, and a fan plate is installed on the side of the slide plate close to the perforation. The fan plate passes through the perforation, and an extrusion ball is installed on the end of the fan plate away from the slide plate. A plurality of fixed blocks are installed in the screening cylinder, and a moving rod is slidably installed on the plurality of fixed blocks. A force-bearing ball is installed on the upper end of the moving rod, and an impact rubber head is installed on the lower end of the moving rod. The force-bearing ball is connected to the fixed block by a flexible spring sheet. When the transmission shaft rotates, the transmission shaft can drive the turntable. The rotary table is provided with a plurality of fan plates, and the fan plates are provided with a plurality of fan plates, so that the fan plates are ...

[0014] Furthermore, when the fan plate is in an extended state, the extrusion ball and the force-bearing ball are on the same circular trajectory, and the lower half of the extrusion ball is flush with the upper half of the force-bearing ball.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the quartz sand needs to be screened, the quartz sand is transported to the screening cylinder through the feed pipe, and the quartz sand can be screened in multiple stages through the coarse screen curved mesh and fine screen curved mesh arranged above and below, which can improve the screening accuracy of the quartz sand.

[0016] The present application sets up a screening and utilization component, which can realize the alternating operation of the two working cylinders through the cooperation of the rotating column and the two driving shafts, thereby realizing continuous adsorption of the inside of the screening cylinder and achieving the effect of dust removal and purification.

[0017] The screening enhancement component set up in the present application can not only utilize the centrifugal force to make the turntable and multiple fan plates form an impeller, so that an upwelling airflow is formed in the screening cylinder, which can ensure that the dust is at the inner top of the screening cylinder, but also drive the squeezing ball to squeeze the force-bearing ball, forming an impact rubber head to impact the rotating ring, which is beneficial to improve the screening efficiency of quartz sand for the coarse screen curved mesh and the fine screen curved mesh under the action of vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle; Figure 2 It is a schematic diagram of the structure of the second viewing angle of the present invention; Figure 3It is a schematic diagram of a first cutaway structure of the present invention; Figure 4 It is a second cross-sectional structural schematic diagram of the present invention; Figure 5 yes Figure 2 A is an enlarged structural diagram; Figure 6 yes Figure 4 The enlarged structural diagram at B in FIG. Figure 7 yes Figure 3 The enlarged structural diagram at C in the figure.

[0019] In the figure: 1, screening cylinder; 2, feeding pipe; 3, discharge pipe; 4, ring rail; 5, swivel; 6, coarse screen curved net; 7, fine screen curved net; 8, driving motor; 9, transmission shaft; 10, through hole; 11, transmission block; 12, linkage rod; 13, connecting rod; 14, first discharge valve; 15, second discharge valve; 16, rotary joint; 17, conveying elevator; 18, crusher; 19, feeding pipe; 20, discharge pipe; 21, discharge pipe; 22. Screening and utilization components; 2201. driving wheel; 2202. driven wheel; 2203. transmission belt; 2204. rotating column; 2205. annular slideway; 2206. working cylinder; 2207. piston; 2208. sliding rod; 2209. sliding hole; 2210. connecting plate; 2211. driving shaft; 2212. air inlet pipe; 2213. confluence; 2214. air intake pipe; 2215. purifier; 2216. air delivery pipe; 23. Screening enhancement assembly; 2301. Turntable; 2302. Chamber; 2303. Perforation; 2304. Slide plate; 2305. Fan plate; 2306. Extrusion ball; 2307. Fixed block; 2308. Moving rod; 2309. Forced ball; 2310. Impact rubber head; 2311. Flexible spring piece. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example: Figure 1-Figure 4 and Figure 7As shown, the present invention provides a technical solution of a quartz sand screening device with a multi-stage screening function, the quartz sand screening device with a multi-stage screening function comprises a screening drum 1, a feeding pipe 2 is installed on the top of the screening drum 1, and a discharge pipe 3 is installed on the bottom of the screening drum 1, two ring rails 4 are fixedly installed in the screening drum 1, and rotating rings 5 ​​are rotatably installed on the two ring rails 4, a coarse screen curved net 6 is installed on one of the rotating rings 5, and a fine screen curved net 7 is installed on the other rotating ring 5, a driving motor 8 is installed on the screening drum 1, and a transmission shaft 9 is installed on the output shaft of the driving motor 8, a through hole 10 is opened on the top of the screening drum 1, and the transmission shaft 9 passes through the through hole 10, and the transmission shaft 9 passes through the through hole 10. A transmission block 11 is installed at the bottom of the shaft 9, and the transmission block 11 is connected to the swivel 5 through a linkage rod 12. The two swivels 5 are connected by a connecting rod 13. When it is necessary to screen the quartz sand, the quartz sand is transported to the screening cylinder 1 through the feed pipe 2. The quartz sand can be screened in multiple stages through the coarse screen curved net 6 and the fine screen curved net 7 arranged up and down, which can improve the screening accuracy of the quartz sand. At the same time, starting the drive motor 8 can drive the coarse screen curved net 6 and the fine screen curved net 7 to rotate through the transmission shaft 9, the linkage rod 12 and the connecting rod 13, thereby avoiding the accumulation of quartz sand on the coarse screen curved net 6 and the fine screen curved net 7, and improving the screening efficiency of the quartz sand.

[0022] The coarse screen curved net 6 is provided with a first discharge valve 14, the fine screen curved net 7 is provided with a second discharge valve 15, the screening cylinder 1 is provided with a conveying elevator 17 and a crusher 18, the second discharge valve 15 is provided with a rotary joint 16, the rotary joint 16 is connected to the input end of the conveying elevator 17 via a conveying pipe 19, the output end of the conveying elevator 17 is connected to the input end of the crusher 18 via a discharge pipe 20, and the output end of the crusher 18 is connected to the output end of the crusher 18. It is connected to the top of the screening cylinder 1 through a discharge pipe 21. When the quartz sand in the screening cylinder 1 is screened, the first discharge valve 14 and the second discharge valve 15 are started, so that the quartz sand retained on the coarse screen curved net 6 and the fine screen curved net 7 can enter the conveying elevator 17 through the conveying pipe 19. By starting the conveying elevator 17 and the crusher 18, the crusher 18 can crush the over-specification quartz sand again, and then transport it back to the screening cylinder 1 through the discharge pipe 21 for re-screening.

[0023] The screening drum 1 is provided with a screening and utilizing assembly 22 and a screening and enhancing assembly 23 , and the rotation of the transmission shaft 9 provides operating driving force for the screening and utilizing assembly 22 and the screening and enhancing assembly 23 .

[0024] like Figure 1-Figure 6As shown, the screening and utilization assembly 22 includes a driving wheel 2201, a driven wheel 2202, a transmission belt 2203, a rotating column 2204, an annular slideway 2205, a working cylinder 2206, a piston 2207, a sliding rod 2208, a sliding hole 2209, a connecting plate 2210 and a driving shaft 2211; A driving wheel 2201 is installed on the upper part of the transmission shaft 9, a driven wheel 2202 is rotatably installed on the top of the screening drum 1, a transmission belt 2203 is sleeved on the driving wheel 2201 and the driven wheel 2202, a rotating column 2204 is installed on the driven wheel 2202, and an annular slideway 2205 is inclined on the side wall of the rotating column 2204, two working cylinders 2206 are installed on the screening drum 1, pistons 2207 are slidably installed in the two working cylinders 2206, and a sliding rod 2208 is installed on the piston 2207, and a sliding hole 2209 is opened on the top of the two working cylinders 2206, and the sliding rod 2208 passes through the sliding hole 2209, and the sliding rod 2208 A connecting plate 2210 is installed on the top, and a driving shaft 2211 is rotatably installed on the connecting plate 2210. The two driving shafts 2211 are inserted in the annular slide 2205. When the transmission shaft 9 rotates, the transmission shaft 9 can drive the driving wheel 2201 to rotate synchronously. The pulley transmission component composed of the driving wheel 2201, the transmission belt 2203 and the driven wheel 2202 can drive the rotating column 2204 to rotate. During the rotation of the rotating column 2204, the annular slide 2205 exerts a squeezing force on the driving shaft 2211, so that the driving shaft 2211 can drive the piston 2207 in the working cylinder 2206 to move back and forth through the connecting plate 2210 and the slide rod 2208.

[0025] One of the drive shafts 2211 is inserted at the lowest point of the annular slide 2205, and the other drive shaft 2211 is inserted at the highest point of the annular slide 2205. By setting the height of the two drive shafts 2211, the two working cylinders 2206 can be operated alternately, thereby achieving continuous adsorption of the screening cylinder 1.

[0026] An air intake pipe 2212 is installed on the input end of the two working cylinders 2206, and the two air intake pipes 2212 are connected through a confluence 2213. The confluence 2213 is connected to the upper part of the screening cylinder 1 through an air intake pipe 2214. A purifier 2215 is installed on the screening cylinder 1. The output ends of the two working cylinders 2206 are connected to the purifier 2215 through an air delivery pipe 2216. When the piston 2207 moves downward along with the drive shaft 2211, the working cylinder 2 As the piston 2207 moves downward, negative pressure adsorption force is formed in 206, so that the working cylinder 2206 can absorb the dust in the screening cylinder 1 through the air inlet pipe 2212 and the air suction pipe 2214 to achieve the dust removal effect. When the piston 2207 moves upward, the dust-containing gas in the working cylinder 2206 can enter the purifier 2215 through the air pipe 2216 as the piston 2207 moves upward, which is convenient for purifying the dust-containing gas and avoiding pollution to the surrounding environment.

[0027] The air inlet pipe 2212, the air suction pipe 2214 and the air delivery pipe 2216 are all one-way pipes.

[0028] like Figure 3 and Figure 7 As shown, the screening enhancement assembly 23 includes a rotating disk 2301, a chamber 2302, a perforation 2303, a slide plate 2304, a fan plate 2305, a squeezing ball 2306, a fixing block 2307, a moving rod 2308, a force-bearing ball 2309, an impact rubber head 2310 and a flexible spring sheet 2311; The transmission shaft 9 is provided with a turntable 2301, and a plurality of chambers 2302 are provided in the turntable 2301. A through hole 2303 is provided on a side of the plurality of chambers 2302 away from the transmission shaft 9. A slide plate 2304 is slidably provided in the plurality of chambers 2302. A fan plate 2305 is provided on a side of the slide plate 2304 close to the through hole 2303. The side of the slide plate 2304 away from the through hole 2303 is connected to the chamber 2302 via an elastic band. The fan plate 2305 passes through the through hole 2303, and the end of the fan plate 2305 away from the slide plate 2304 is installed with a squeezing ball 2306. A plurality of fixed blocks 2307 are installed in the screening cylinder 1, and a moving rod 2308 is slidably installed on the plurality of fixed blocks 2307. A force-bearing ball 2309 is installed at the upper end of the moving rod 2308, and an impact rubber head 2310 is installed at the lower end of the moving rod 2308. The force-bearing ball 2309 and the fixed block 2307 are connected by a soft 2309 when the rotating disk 2301 is rotated, so that the sliding plate 2304 in the chamber 2302 can move outward under the centrifugal force, so that the sliding plate 2304 can drive the fan plate 2305 to extend out of the through hole 2303, so that the rotating disk 2301 and the plurality of fan plates 2305 can form an impeller, so that an upwelling airflow is formed in the screening cylinder 1, and the dust can be ensured to be at the inner top of the screening cylinder 1. At the same time, the extension of the fan plate 2305 can drive the squeezing ball 2306 to move synchronously, so that the fan plate 2305 can drive the squeezing ball 2306 to instantly squeeze the force-bearing ball 2309 as the rotating disk 2301 rotates, and the force-bearing ball 2309 compresses the flexible spring sheet 2311 while driving the impact rubber head 2310 to impact the rotating ring 5 through the moving rod 2308, which is beneficial to improve the screening efficiency of the coarse screen curved net 6 and the fine screen curved net 7 under the vibration force.

[0029] When the fan plate 2305 is in an extended state, the squeezing ball 2306 and the force-bearing ball 2309 are on the same circular trajectory, and the lower half of the squeezing ball 2306 is flush with the upper half of the force-bearing ball 2309 .

[0030] Working principle of the present invention: When it is necessary to screen the quartz sand, the quartz sand is transported into the screening cylinder 1 through the feed pipe 2, and the quartz sand can be screened in multiple stages through the coarse screen curved mesh 6 and the fine screen curved mesh 7 arranged above and below, which can improve the screening accuracy of the quartz sand. At the same time, starting the drive motor 8 can drive the coarse screen curved mesh 6 and the fine screen curved mesh 7 to rotate through the transmission shaft 9, the linkage rod 12 and the connecting rod 13, thereby avoiding the accumulation of quartz sand on the coarse screen curved mesh 6 and the fine screen curved mesh 7, and improving the screening efficiency of the quartz sand.

[0031] After the quartz sand is screened in the screening cylinder 1, the first discharge valve 14 and the second discharge valve 15 are started, so that the quartz sand retained on the coarse screen curved net 6 and the fine screen curved net 7 can enter the conveying elevator 17 through the conveying pipe 19. By starting the conveying elevator 17 and the crusher 18, the crusher 18 can crush the oversized quartz sand again, and then transport it back to the screening cylinder 1 through the discharge pipe 21 for re-screening.

[0032] When the transmission shaft 9 rotates, the transmission shaft 9 can drive the driving wheel 2201 to rotate synchronously, and the pulley transmission component composed of the driving wheel 2201, the transmission belt 2203 and the driven wheel 2202 can drive the rotating column 2204 to rotate. During the rotation of the rotating column 2204, the annular slideway 2205 exerts an extruding force on the driving shaft 2211, so that the driving shaft 2211 can drive the piston 2207 in the working cylinder 2206 to reciprocate through the connecting plate 2210 and the slide rod 2208. In addition, by setting the height of the two driving shafts 2211, the two working cylinders 2206 can be operated alternately, thereby realizing continuous adsorption of the screening cylinder 1.

[0033] When the piston 2207 moves downward along with the drive shaft 2211, a negative pressure adsorption force can be formed in the working cylinder 2206 as the piston 2207 moves downward, so that the working cylinder 2206 can absorb the dust in the screening cylinder 1 through the air inlet pipe 2212 and the air suction pipe 2214, thereby achieving the dust removal effect. When the piston 2207 moves upward, the dust-containing gas in the working cylinder 2206 can enter the purifier 2215 through the air supply pipe 2216 as the piston 2207 moves upward, thereby facilitating the purification of the dust-containing gas and avoiding pollution to the surrounding environment.

[0034] When the transmission shaft 9 rotates, the transmission shaft 9 can drive the turntable 2301 to rotate synchronously, so that the slide plate 2304 in the chamber 2302 can move outward under the centrifugal force, so that the slide plate 2304 can drive the fan plate 2305 to extend out of the perforation 2303, so that the turntable 2301 and the plurality of fan plates 2305 can form an impeller, so that an upwelling airflow is formed in the screening cylinder 1, and the dust can be ensured to be at the inner top of the screening cylinder 1. At the same time, the extension of the fan plate 2305 can drive the squeezing ball 2306 to move synchronously, so that the fan plate 2305 can drive the squeezing ball 2306 to instantly squeeze the force-bearing ball 2309 as the turntable 2301 rotates, and the force-bearing ball 2309 compresses the flexible spring sheet 2311 while driving the impact rubber head 2310 to impact the rotating ring 5 through the moving rod 2308, which is beneficial to improve the screening efficiency of the coarse screen curved net 6 and the fine screen curved net 7 under the vibration force.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A quartz sand screening device with multi-stage screening function, characterized in that: The quartz sand screening device with multi-stage screening function comprises a screening drum (1), a feed pipe (2) is installed at the top of the screening drum (1), and a discharge pipe (3) is installed at the bottom of the screening drum (1), two ring rails (4) are fixedly installed in the screening drum (1), and a rotating ring (5) is rotatably installed on the two ring rails (4), a coarse screen curved net (6) is installed on one of the rotating rings (5), and a fine screen curved net (7) is installed on the other rotating ring (5), a driving motor (8) is installed on the screening drum (1), and a transmission shaft (9) is installed on the output shaft of the driving motor (8), a through hole (10) is opened at the top of the screening drum (1), the transmission shaft (9) passes through the through hole (10), and a transmission block (11) is installed at the bottom of the transmission shaft (9), the transmission block (11) is connected to the rotating ring (5) through a linkage rod (12), and the two rotating rings (5) are connected through a connecting rod (13).

2. The quartz sand screening device with multi-stage screening function according to claim 1, characterized in that: The coarse screen curved net (6) is provided with a first discharge valve (14), the fine screen curved net (7) is provided with a second discharge valve (15), the screening cylinder (1) is provided with a conveying elevator (17) and a crusher (18), the second discharge valve (15) is provided with a rotary joint (16), the rotary joint (16) is connected to the input end of the conveying elevator (17) via a conveying pipe (19), the output end of the conveying elevator (17) is connected to the input end of the crusher (18) via a discharge pipe (20), and the output end of the crusher (18) is connected to the top of the screening cylinder (1) via a discharge pipe (21).

3. The quartz sand screening device with multi-stage screening function according to claim 2, characterized in that: The screening cylinder (1) is provided with a screening and utilization component (22) and a screening and enhancement component (23), and the rotation of the transmission shaft (9) provides operating driving force for the screening and utilization component (22) and the screening and enhancement component (23).

4. The quartz sand screening device with multi-stage screening function according to claim 3, characterized in that: The screening and utilization component (22) comprises a driving wheel (2201), a driven wheel (2202), a transmission belt (2203), a rotating column (2204), an annular slideway (2205), a working cylinder (2206), a piston (2207), a sliding rod (2208), a sliding hole (2209), a connecting plate (2210) and a driving shaft (2211); A driving wheel (2201) is mounted on the upper portion of the transmission shaft (9); a driven wheel (2202) is rotatably mounted on the top of the screening drum (1); a transmission belt (2203) is sleeved on the driving wheel (2201) and the driven wheel (2202); a rotating column (2204) is mounted on the driven wheel (2202); an annular slideway (2205) is obliquely mounted on the side wall of the rotating column (2204); two working cylinders (2206) are mounted on the screening drum (1); the two working cylinders (2206) are A piston (2207) is slidably installed in each of the two working cylinders (2206), a sliding rod (2208) is installed on the piston (2207), a sliding hole (2209) is opened on the top of the two working cylinders (2206), the sliding rod (2208) passes through the sliding hole (2209), and a connecting plate (2210) is installed on the top of the sliding rod (2208), a driving shaft (2211) is rotatably installed on the connecting plate (2210), and the two driving shafts (2211) are inserted in the annular slideway (2205).

5. The quartz sand screening device with multi-stage screening function according to claim 4, characterized in that: One of the drive shafts (2211) is inserted at the lowest point of the annular slideway (2205), and the other drive shaft (2211) is inserted at the highest point of the annular slideway (2205).

6. The quartz sand screening device with multi-stage screening function according to claim 5, characterized in that: An air intake pipe (2212) is installed on the input ends of the two working cylinders (2206); the two air intake pipes (2212) are connected via a flow combiner (2213); the flow combiner (2213) is connected to the upper part of the screening cylinder (1) via an air intake pipe (2214); a purifier (2215) is installed on the screening cylinder (1); and the output ends of the two working cylinders (2206) are connected to the purifier (2215) via an air delivery pipe (2216).

7. The quartz sand screening device with multi-stage screening function according to claim 6, characterized in that: The air inlet pipe (2212), the air suction pipe (2214) and the air delivery pipe (2216) are all one-way pipes.

8. The quartz sand screening device with multi-stage screening function according to claim 6, characterized in that: The screening enhancement component (23) comprises a rotating disk (2301), a chamber (2302), a perforation (2303), a slide plate (2304), a fan plate (2305), a squeezing ball (2306), a fixing block (2307), a moving rod (2308), a force-bearing ball (2309), an impact rubber head (2310), and a flexible spring sheet (2311); A rotating disk (2301) is installed on the transmission shaft (9), and a plurality of chambers (2302) are provided in the rotating disk (2301), and a through hole (2303) is provided on a side of the plurality of chambers (2302) away from the transmission shaft (9), and a slide plate (2304) is slidably installed in the plurality of chambers (2302), and a fan plate (2305) is installed on a side of the slide plate (2304) close to the through hole (2303), and the fan plate (2305) passes through the through hole (2303), and the fan plate (2305) ) is installed with a squeezing ball (2306) at the end away from the slide plate (2304), a plurality of fixed blocks (2307) are installed in the screening cylinder (1), a moving rod (2308) is slidably installed on the plurality of fixed blocks (2307), a force-bearing ball (2309) is installed at the upper end of the moving rod (2308), and an impact rubber head (2310) is installed at the lower end of the moving rod (2308), and the force-bearing ball (2309) is connected to the fixed block (2307) via a flexible spring sheet (2311).

9. The quartz sand screening device with multi-stage screening function according to claim 8, characterized in that: When the fan plate (2305) is in an extended state, the squeezing ball (2306) and the force-bearing ball (2309) are on the same circular trajectory, and the lower half of the squeezing ball (2306) is flush with the upper half of the force-bearing ball (2309).

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