A quartz sand washing and grinding device

Abstract

This utility model relates to the field of quartz sand preparation technology, specifically to a quartz sand washing and grinding device. It includes a grinding cylinder with a top cover, a bottom plate at the bottom, and a sealed grinding chamber inside. The top cover has a central discharge port, and the upper part of the grinding cylinder has a Venturi inlet. An inclined Venturi air inlet pipe is located at the Venturi inlet, and a feeding assembly connected to the Venturi air inlet pipe is also present. The inner wall of the grinding cylinder has a spiral acceleration groove arranged from top to bottom, with the top inlet of the spiral acceleration groove tangentially aligned with the opening of the Venturi air inlet pipe. After entering the grinding cylinder, the quartz sand undergoes a spiral acceleration motion from top to bottom along the spiral acceleration groove, generating a high-speed spiral centrifugal force. This increases the movement path and speed of the quartz sand within the grinding cylinder. Water is injected into the grinding chamber through the water inlet assembly, and the combined action of water and airflow generates turbulence, further accelerating the centrifugal force of the quartz sand. The sand is thoroughly ground through continuous collisions with the grinding cylinder and with each other.

Description

Technical Field

[0001] This utility model relates to the field of quartz sand preparation technology, and in particular to a quartz sand washing and grinding device. Background Technology

[0002] Traditional quartz sand grinding equipment, including ball mills and rod mills, generates iron filings during the grinding process due to the wear of steel balls or rods against the steel liners. These filings are incorporated into the quartz sand, increasing the iron content of the product. Photovoltaic and electronic grade quartz sand requires an iron content of <50ppm, which traditional ball mills cannot meet. This necessitates an additional acid washing process to remove iron, increasing costs. Furthermore, the random movement of the steel balls leads to uneven grinding intensity distribution, resulting in large fluctuations in product particle size and a mixture of fine and coarse particles. This prevents achieving fine grinding and requires additional screening, further increasing process costs. Moreover, a separate water washing process is required after the grinding process, making the process complex and inefficient. Utility Model Content

[0003] The technical problem to be solved by this invention is to address the shortcomings of the prior art by providing a quartz sand washing and grinding device to solve the problems mentioned in the background art. This invention uses a venturi air inlet pipe in conjunction with a feeding assembly to make the quartz sand rotate at high speed along the trajectory of the spiral acceleration groove of the grinding cylinder, generating a high-speed spiral centrifugal force. This has the advantage of increasing the movement path and speed of the quartz sand in the grinding cylinder, thereby improving the grinding efficiency and grinding effect.

[0004] The technical problem to be solved by this utility model is achieved through the following technical solution: a quartz sand washing and grinding device, including a grinding cylinder, a top cover at the top of the grinding cylinder, a bottom plate at the bottom of the grinding cylinder, a sealed grinding chamber inside the grinding cylinder, a central discharge port on the top cover of the grinding cylinder, a Venturi inlet at the top of the grinding cylinder, an inclined Venturi air inlet pipe at the Venturi inlet, and a feeding component connected to the Venturi air inlet pipe. The inner wall of the grinding cylinder is provided with a spiral acceleration groove arranged from top to bottom, and the top spiral inlet of the spiral acceleration groove is tangent to the opening of the Venturi air inlet pipe. The inclined Venturi air inlet pipe is tangent to the top spiral inlet of the spiral acceleration groove on the inner wall of the grinding cylinder, so that after the quartz sand enters the grinding cylinder, it can move in a spiral acceleration motion from top to bottom along the spiral acceleration groove, generating a high-speed spiral centrifugal force, increasing the movement path and speed of the quartz sand in the grinding cylinder, thereby improving the grinding efficiency and grinding effect.

[0005] The bottom plate of the cylinder is equipped with a stirring assembly and a water inlet for the grinding chamber, which in turn is equipped with a water inlet assembly. This water inlet assembly allows water to be injected into the grinding chamber during the grinding process. The combined action of water and airflow generates turbulence, which, through the stirring assembly, accelerates the centrifugal motion of the quartz sand. The continuous collisions between the quartz sand and the grinding cylinder, as well as between the sands themselves, improve grinding efficiency and effectiveness, resulting in thorough grinding of the quartz sand.

[0006] As a further embodiment of this utility model, a central discharge pipe is provided inside the central discharge port, the central discharge pipe extends downward and inward into the grinding chamber, and the lower end of the central discharge pipe is set to avoid the stirring assembly. A vacuum storage device is connected to the upper end of the central discharge pipe, which is equipped with a discharge valve. The central discharge pipe extends downwards and inwards into the grinding chamber, with its lower end positioned to avoid interference from the agitator. This design prevents the agitator from interfering with the discharge process, preventing splashing and agitation of quartz sand during agitation from affecting the smoothness of the discharge and ensuring that the ground quartz sand can be stably discharged from the grinding chamber through the discharge pipe. The vacuum storage device, connected to the upper end of the central discharge pipe, creates a negative pressure environment between the central discharge pipe and the vacuum storage device. This continuously draws out the quartz sand and transfers it to the vacuum storage device.

[0007] As a further embodiment of this invention, the stirring assembly includes a stirring motor. The stirring motor shaft is mounted to the bottom plate of the cylinder via a rotary seal. The stirring motor shaft extends upward and inward into the grinding chamber. A stirring shaft is provided at the end of the stirring motor shaft, and stirring blades are evenly distributed around the circumference of the stirring shaft. The stirring blades are fan-shaped, and the stirring shaft is aligned with the spiral direction of the spiral acceleration groove. The evenly distributed fan-shaped stirring blades around the circumference of the stirring shaft can expand the stirring coverage area, ensuring that the quartz sand at the bottom of the grinding chamber is fully agitated, preventing local accumulation or settling of quartz sand.

[0008] The stirring shaft and the spiral acceleration groove are aligned in the same direction, which allows for high-speed centrifugal grinding of the quartz sand along the spiral acceleration groove, resulting in more thorough grinding of the quartz sand and more uniform particle size.

[0009] As a further embodiment of this invention, the feeding assembly includes a feeding pipe with a feeding cone at the top and a feeding valve on the feeding pipe. The feeding cone at the top of the feeding pipe is funnel-shaped, which guides quartz sand and other silica sand smoothly into the feeding pipe, reducing the possibility of accumulation and blockage at the inlet. Its inclined conical surface allows the quartz sand to slide naturally under gravity and smoothly enter the grinding chamber along the feeding pipe, just as a funnel can quickly guide liquid into a pipe, improving the smoothness and efficiency of feeding. The feeding valve on the feeding pipe can conveniently control the flow rate of quartz sand. Operators can flexibly adjust the opening of the feeding valve according to the load of the grinding chamber, the grinding speed, and the requirements of subsequent washing processes, precisely controlling the amount of quartz sand entering the grinding chamber, ensuring that the entire grinding and washing process can be carried out stably and efficiently.

[0010] As a further embodiment of this invention, the Venturi inlet pipe is obliquely inserted into the wall of the grinding cylinder, and the feed pipe remains vertical and connected to the Venturi inlet pipe. The oblique insertion of the Venturi inlet pipe into the grinding cylinder wall allows the high-speed airflow to meet the quartz sand and enter the grinding cylinder at a certain angle, thereby better driving the movement of the quartz sand and achieving thorough mixing of the airflow and quartz sand. This oblique cutting method allows the airflow to form a spiral flow trajectory within the grinding cylinder, increasing the contact area and contact time between the airflow and the quartz sand, improving the mixing effect, and contributing to a more uniform and efficient subsequent grinding and washing process.

[0011] The obliquely inserted Venturi air inlet pipe enables the airflow to form a specific flow field distribution within the grinding cylinder. This flow field distribution helps the quartz sand to form an orderly circulating motion within the grinding cylinder. Combined with the spiral acceleration grooves on the inner wall of the grinding cylinder, the quartz sand can be continuously accelerated and ground.

[0012] As a further embodiment of this invention, the spiral acceleration groove includes a spiral groove arranged downwards along the inner wall of the grinding chamber. The thread profile is trapezoidal, and the upper end of the spiral groove is the starting end, which is transitionally connected to the venturi inlet. The transitional connection between the upper end of the spiral groove and the venturi inlet allows the quartz sand entering from the venturi inlet to smoothly enter the spiral acceleration groove, reducing the impact and energy loss during the entry of the quartz sand. The quartz sand is continuously accelerated in the spiral acceleration groove, generating sufficient friction and collision with the inner wall of the grinding chamber and other quartz sand, thereby improving the grinding effect and allowing the quartz sand to be more thoroughly ground and washed.

[0013] As a further embodiment of this invention, the water inlet assembly includes a water inlet pipe, with a water inlet flange at the lower end of the pipe. A water inlet pump is connected to the water inlet flange, and a pump mounting platform is located below the water inlet pump. The pump mounting platform reduces vibration and noise during the operation of the water inlet pump. The platform provides stable support for the water inlet pump, which in turn provides the power for water intake.

[0014] As a further embodiment of this invention, a support base is provided below the bottom plate of the cylinder. The support base includes a support ring, and several support legs are evenly distributed below the support ring. The support ring can effectively transfer the weight of the cylinder to the support legs, which then distribute it to the ground, thereby improving the load-bearing capacity of the support base and enabling the cylinder to withstand greater weight and pressure.

[0015] The beneficial effects of this utility model are as follows: The quartz sand washing and grinding device provided by this utility model includes a grinding cylinder, a top cover at the top of the grinding cylinder, a bottom plate at the bottom of the grinding cylinder, a sealed grinding chamber inside the grinding cylinder, a central discharge port on the top cover of the grinding cylinder, a Venturi feed port at the top of the grinding cylinder, an inclined Venturi air inlet pipe at the Venturi feed port, and a feeding component connected to the Venturi air inlet pipe. The inner wall of the grinding cylinder is provided with a spiral acceleration groove arranged from top to bottom, and the top spiral inlet of the spiral acceleration groove is tangent to the opening of the Venturi air inlet pipe. The inclined Venturi air inlet pipe is tangent to the top spiral inlet of the spiral acceleration groove on the inner wall of the grinding cylinder, so that after the quartz sand enters the grinding cylinder, it can move in a spiral acceleration motion from top to bottom along the spiral acceleration groove, generating a high-speed spiral centrifugal force, which increases the movement path and speed of the quartz sand in the grinding cylinder, thereby improving the grinding efficiency and grinding effect.

[0016] The bottom plate of the cylinder is equipped with a stirring assembly and a water inlet for the grinding chamber, which in turn is equipped with a water inlet assembly. This water inlet assembly allows water to be injected into the grinding chamber during the grinding process. The combined action of water and airflow generates turbulence, which, through the stirring assembly, accelerates the centrifugal motion of the quartz sand. The continuous collisions between the quartz sand and the grinding cylinder, as well as between the sands themselves, improve grinding efficiency and effectiveness, resulting in thorough grinding of the quartz sand.

[0017] The central discharge port is equipped with a central discharge pipe that extends downwards and inwards into the grinding chamber, with its lower end positioned to avoid the stirring assembly. The upper end of the central discharge pipe is connected to a vacuum storage device. This design, where the central discharge pipe extends downwards and inwards into the grinding chamber, avoiding the stirring assembly, prevents interference from the stirring assembly during the discharge process, preventing splashing and agitation of quartz sand from affecting the smoothness of the discharge, and ensuring that the ground quartz sand can be stably discharged from the grinding chamber through the discharge pipe. The vacuum storage device connected to the upper end of the central discharge pipe creates a negative pressure environment between the central discharge pipe and the vacuum storage device, continuously drawing out quartz sand and transferring it to the vacuum storage device.

[0018] The stirring assembly features a fan-shaped stirring blade evenly distributed along its circumferential shaft, which expands the stirring coverage area and ensures that the quartz sand at the bottom of the grinding chamber is fully agitated, preventing localized accumulation or sedimentation of the quartz sand. The stirring shaft and the spiral acceleration groove are aligned in the same spiral direction, enabling high-speed centrifugal grinding motion of the quartz sand along the groove, resulting in more thorough grinding and more uniform particle size.

[0019] The feeding assembly includes a feed pipe with a feed cone at the top and a feed valve on the feed pipe. The feed cone at the top of the feed pipe is funnel-shaped, which guides quartz sand and other silica sand smoothly into the feed pipe, reducing the possibility of quartz sand accumulation and blockage at the feed inlet. Its inclined conical surface allows the quartz sand to slide naturally under gravity and smoothly enter the grinding chamber along the feed pipe, just as a funnel can quickly guide liquid into a pipe, improving the smoothness and efficiency of feeding. The feed valve on the feed pipe can easily control the feed flow rate of quartz sand. Operators can flexibly adjust the opening of the feed valve according to the load of the grinding chamber, the grinding speed, and the requirements of subsequent washing processes, precisely controlling the amount of quartz sand entering the grinding chamber, ensuring that the entire grinding and washing process can be carried out stably and efficiently. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the internal structure of the grinding cylinder of this utility model; Figure 5 This is a schematic diagram of the stirring assembly structure of this utility model.

[0021] Among them: stirring assembly (1), stirring motor (101), rotary seal (102), stirring shaft (103), stirring blade (104), water inlet assembly (2), pump mounting platform (201), water inlet pump (202), water inlet pipe (203), support base (3), support leg (301), support ring (302), grinding cylinder (4), top cover (401), spiral acceleration groove (402), central discharge pipe (5), discharge valve (501), vacuum storage device (502), feeding assembly (6), feeding pipe (601), feeding valve (602), feeding cone (603), venturi air inlet pipe (7). Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely for distinguishing the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] like Figures 1 to 5 As shown, a quartz sand washing and grinding device includes a grinding cylinder 4, a top cover 401 at the top of the grinding cylinder, a bottom plate at the bottom of the grinding cylinder, and a support base 3 below the bottom plate. The support base includes a support ring 302, and three legs 301 evenly distributed below the support ring. The support ring effectively transfers the weight of the grinding cylinder to the three legs, which then distribute it to the ground. The load-bearing capacity of the support base allows the cylinder to withstand greater weight and pressure.

[0026] The grinding cylinder forms a sealed grinding chamber. The top cover of the grinding cylinder is provided with a central discharge port. The central discharge port is provided with a central discharge pipe 5. The central discharge pipe extends downward and inward into the grinding chamber. The lower end of the central discharge pipe is set to avoid the stirring assembly 1. The central discharge pipe does not interfere with the stirring movement of the stirring assembly. The splashing and stirring of quartz sand will not affect the discharge.

[0027] A vacuum storage device 502 is connected to the upper end of the central discharge pipe, and a discharge valve 501 is installed on the central discharge pipe. A negative pressure environment is formed between the central discharge pipe and the vacuum storage device. Quartz sand is continuously drawn upward and transferred to the vacuum storage device. The discharge valve is opened when discharging.

[0028] The grinding cylinder has a Venturi inlet at the top, an inclined Venturi air inlet pipe 7 at the Venturi inlet, and a feeding assembly 6 connected to the Venturi air inlet pipe. The feeding assembly includes a feeding pipe 601, a feeding cone 603 at the top of the feeding pipe, and a feeding valve 602 on the feeding pipe. The feeding cone is funnel-shaped, and the quartz sand to be ground is temporarily stored in the feeding cone.

[0029] When feeding is required, the feed valve 602 is opened. The inclined conical surface allows the quartz sand to slide down naturally under the action of gravity, fall along the feed pipe, and smoothly enter the grinding chamber.

[0030] The feed valve 602 adjusts its opening in real time to control the feed flow rate of quartz sand. Precise control of the amount of quartz sand entering the grinding chamber ensures that the entire grinding and washing process can proceed efficiently and stably.

[0031] The Venturi inlet pipe 7 is obliquely inserted into the wall of the grinding cylinder, and the feed pipe is always kept vertical and connected to the Venturi inlet pipe. The high-speed airflow encounters the quartz sand and enters the grinding cylinder at a certain angle, driving the quartz sand to move and achieving thorough mixing of the airflow and the quartz sand.

[0032] The oblique cutting method can make the airflow form a spiral flow trajectory in the grinding cylinder, and the airflow and quartz sand are fully mixed. The obliquely cut Venturi inlet pipe can make the airflow form a specific flow field distribution in the grinding cylinder. The inner wall of the grinding cylinder is provided with a spiral acceleration groove 402 arranged from top to bottom. The top spiral inlet of the spiral acceleration groove is tangentially arranged with the opening of the Venturi inlet pipe. The spiral acceleration groove includes a threaded groove arranged spirally downward along the inner wall of the grinding chamber. The thread tooth profile is trapezoidal. The upper end of the threaded groove is the starting end, which is transitionally connected to the opening of the Venturi inlet pipe.

[0033] The venturi inlet pipe, in conjunction with the spiral acceleration groove on the inner wall of the grinding cylinder, allows the quartz sand entering through the venturi inlet pipe to smoothly enter the spiral acceleration groove. Under the action of centrifugal force, the quartz sand is continuously accelerated and thrown towards the inner wall of the grinding cylinder, generating sufficient friction and collision with the inner wall of the grinding chamber and other quartz sand. This increases the movement path and speed of the quartz sand in the grinding cylinder, and after the collision, it is broken into fine quartz sand particles.

[0034] A stirring assembly 1 and a water inlet for the pulverizing chamber are located at the bottom plate of the cylinder. A water inlet assembly 2 is located at the water inlet for the pulverizing chamber. The water inlet assembly includes a water inlet pipe 203, with a water inlet flange at its lower end. A water inlet pump 202 is connected to the water inlet flange, and a pump mounting platform 201 is located below the water inlet pump. The water inlet pump is mounted on the pump mounting platform, which provides stable support for the pump and provides the power for water intake.

[0035] Simultaneously with feeding, the water pump 202 is started, and pure water is injected into the crushing chamber through the water inlet pipe. The water mixes with the quartz sand driven by the high-speed airflow, forming bubbles in the liquid. The water and airflow work together to generate turbulence, and the centrifugal motion of the quartz sand is accelerated by the stirring component. The quartz sand is fully ground in the process of continuous collision with the grinding cylinder and collision with each other.

[0036] When the water level is submerged at the lower end of the central discharge pipe, and the water level is 5cm-10cm above the lower pipe opening, stop the water pump.

[0037] Quartz sand is continuously centrifuged and ground to obtain fine particles. The central discharge pipe continuously sucks the quartz sand upwards and transfers it to a vacuum storage device.

[0038] The stirring assembly 1 includes a stirring motor 101. Before feeding, the stirring motor is started. The stirring motor shaft is installed with the bottom plate of the cylinder through a rotary seal 102. The stirring motor shaft extends upward and inward into the grinding chamber. A stirring shaft 103 is provided at the end of the stirring motor shaft. Stirring blades 104 are evenly distributed around the stirring shaft in a circumferential direction. The stirring blades are fan-shaped, and the stirring shaft is aligned with the spiral direction of the spiral acceleration groove. The evenly distributed fan-shaped stirring blades around the stirring shaft can expand the stirring coverage area, so that the quartz sand at the bottom of the grinding chamber is fully stirred, avoiding local accumulation or sedimentation of quartz sand.

[0039] The stirring shaft and the spiral acceleration groove are aligned in the same direction, which allows for high-speed centrifugal grinding of the quartz sand along the spiral acceleration groove, resulting in more thorough grinding of the quartz sand and more uniform particle size.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A quartz sand washing and grinding device, characterized in that, The grinding cylinder includes a grinding cylinder (4), a top cover (401) on the top of the grinding cylinder, a bottom plate at the bottom of the grinding cylinder, a sealed grinding chamber inside the grinding cylinder, a central discharge port on the top cover of the grinding cylinder, a Venturi feed port at the top of the grinding cylinder, an inclined Venturi air inlet pipe (7) at the Venturi feed port, and a feeding assembly (6) connected to the Venturi air inlet pipe. The inner wall of the grinding cylinder is provided with a spiral acceleration groove (402) arranged from top to bottom, and the spiral acceleration groove at the top of the spiral acceleration groove is tangential to the Venturi air inlet pipe. The bottom plate of the cylinder is equipped with a stirring assembly (1) and a water inlet for the crushing chamber, and the water inlet for the crushing chamber is equipped with a water inlet assembly (2).

2. The quartz sand washing and grinding device according to claim 1, characterized in that, The central discharge port is provided with a central discharge pipe (5), which extends downward into the grinding chamber, and the lower end of the central discharge pipe is set away from the stirring assembly. A vacuum storage device (502) is connected to the upper end of the central discharge pipe, and a discharge valve (501) is provided on the central discharge pipe.

3. The quartz sand washing and grinding device according to claim 2, characterized in that, The stirring assembly (1) includes a stirring motor (101). The stirring motor shaft is installed in conjunction with the bottom plate of the cylinder through a rotary seal (102). The stirring motor shaft extends upward and inward into the grinding chamber. The stirring motor shaft end is provided with a stirring shaft (103). The stirring shaft is provided with stirring blades (104) evenly distributed around the circumference. The stirring blades are fan-shaped stirring blades. The stirring shaft is aligned with the spiral direction of the spiral acceleration groove.

4. The quartz sand washing and grinding device according to claim 3, characterized in that, The feeding assembly (6) includes a feeding pipe (601), a feeding cone (603) at the top of the feeding pipe, and a feeding valve (602) on the feeding pipe.

5. The quartz sand washing and grinding apparatus according to claim 4, characterized in that, The Venturi air inlet pipe is obliquely cut into the wall of the grinding cylinder, and the feed pipe (601) is always kept in a vertical direction and connected to the Venturi air inlet pipe.

6. The quartz sand washing and grinding apparatus according to claim 4, characterized in that, The spiral acceleration groove (402) includes a spiral groove arranged downward along the inner wall of the grinding chamber. The thread profile is trapezoidal. The upper end of the spiral groove is the starting end, which is connected to the Venturi intake pipe port.

7. The quartz sand washing and grinding apparatus according to claim 5, characterized in that, The water inlet assembly (2) includes a water inlet pipe (203), a water inlet flange at the lower end of the water inlet pipe, a water inlet pump (202) connected to the water inlet flange, and a pump mounting platform (201) below the water inlet pump.

8. The quartz sand washing and grinding apparatus according to claim 1, characterized in that, A support base (3) is provided below the bottom plate of the cylinder. The support base includes a support ring (302) and several support legs (301) are evenly distributed below the support ring.

Images