A square vibrating screen for quartz sand

Abstract

A square gyratory screen for quartz sand, belonging to the field of quartz sand production technology, includes two support frames with multiple sets of connecting arms arranged correspondingly at the front and rear of the two support frames. A screening box is set between the two support frames, and the connecting arms are connected to the screening box. It also includes a screening component and an adjustable eccentric gyratory mechanism. The adjustable eccentric gyratory mechanism includes: a connecting rod, a connecting plate, a drive rod, a first positioning hole, a second positioning hole, and an eccentric wheel set. This utility model's adjustable eccentric gyratory mechanism can flexibly adjust the vibration and gyratory height of each set of screens, adapting to the screening needs of quartz sand with different particle sizes and viscosity characteristics. It allows for targeted selection of screening modes, improving screening efficiency and avoiding incomplete screening or excessive crushing of materials. It is equipped with cams of different eccentric distances, with the appropriate cam installed at the central first positioning hole, and the others positioned at the second positioning holes at both ends of the drive rod, reserving sufficient operating space for the central cam.

Description

Technical Field

[0001] This utility model belongs to the field of quartz sand production technology, specifically relating to a square oscillating screen for quartz sand. Background Technology

[0002] Square gyratory screens are commonly used for quartz sand screening. These screens allow the quartz sand to separate into strata on the screen surface, ensuring that sand meeting size requirements passes through the screen openings and achieving separation of quartz sand of different specifications. This equipment is highly adaptable, efficiently processes quartz sand, and ensures accurate particle size distribution after screening. It is widely used in the grading stage of quartz sand processing.

[0003] In related technology (Chinese patent with publication number CN220574011U), a fast and efficient gyratory screen for quartz sand is disclosed, including a square gyratory screen body, a vibrating screen mesh inside the square gyratory screen body, and a material feeding and leveling mechanism inside the square gyratory screen body. The material feeding and leveling mechanism includes a material feeding guide slope, a leveling support arm, and an electric push rod. The material feeding guide slope is set inside the square gyratory screen body, the leveling support arm is fixed to the two edges of the rear end face of the material feeding guide slope, and the electric push rod is set on the rear end face of the material feeding guide slope. In this utility model, through the set material feeding guide slope, the added quartz sand material is guided by the two slopes of the material feeding guide slope and partially slides down to the two edges of the vibrating screen mesh, thereby improving the dispersion of the material and achieving the purpose of making full use of the vibrating screen mesh.

[0004] In the conventional square gyratory screen process for quartz sand screening, the screening method mainly relies on cams to drive the screen to vibrate and oscillate. However, since the eccentricity of the cam is fixed, the vibration amplitude and oscillation amplitude of the screen cannot be adjusted, making it difficult to adapt to the screening needs of quartz sand with different particle sizes and viscosity characteristics. Utility Model Content

[0005] To address the problem that existing conventional square gyratory screens in quartz sand screening processes rely on cams to drive the screen mesh for vibration and oscillation, the fixed cam eccentricity prevents adjustment of the vibration and oscillation amplitudes, making it difficult to adapt to the screening needs of quartz sand with different particle sizes and viscosity characteristics. This invention provides a square gyratory screen for quartz sand, employing an adjustable eccentric oscillation mechanism. This allows for flexible adjustment of the vibration and oscillation height of each set of screens, adapting to the screening needs of quartz sand with different particle sizes and viscosity characteristics. Furthermore, it allows for targeted selection of screening modes based on the different properties of the quartz sand, offering greater specificity and flexibility, resulting in better screening effects for quartz sand with different properties, and avoiding problems such as incomplete screening or over-crushing of some materials. The specific technical solution is as follows:

[0006] A square gyratory screen for quartz sand includes two support frames, with multiple sets of connecting arms arranged correspondingly front and rear to the two support frames. A screening box is disposed between the two support frames, and the connecting arms are connected to the screening box. The screen also includes a screening assembly and an adjustable eccentric gyratory mechanism. The adjustable eccentric gyratory mechanism includes a connecting rod, a connecting plate, a drive rod, a first positioning hole, a second positioning hole, and an eccentric wheel assembly. The connecting rod is located on the right side of the screening assembly; the connecting plate is installed in the middle of the right side wall of the connecting rod; the drive rod rotates from front to back within the screening box cavity; the first positioning hole is formed through the middle of the drive rod and is located below the connecting plate; multiple second positioning holes are provided, and these holes are symmetrically arranged on the drive rod; multiple eccentric wheel assemblies are provided, and each set of eccentric wheel assemblies is positioned on the drive rod.

[0007] In the above technical solution, each set of eccentric wheels includes: a sleeve, a cam, and a positioning pin. The sleeve is sleeved on the drive rod; the cam is fixedly installed on the sleeve; the positioning pin is threaded through the outer wall of the sleeve, and the outer wall of the positioning pin is provided with an external thread that matches the internal threads of the first positioning hole and the second positioning hole.

[0008] In the above technical solution, each cam is eccentrically arranged relative to the drive rod, and the eccentricity of each cam is different.

[0009] In the above technical solution, the screening component is disposed in the inner cavity of the screening box. The screening component includes: elastic elements, mounting plates, frames, and screens. Multiple sets of elastic elements are disposed at the four top corners of the screening component. The mounting plate is mounted on the bottom of the elastic elements. Two sets of frames are disposed, with the two sets of frames respectively positioned on the left and right sides of the bottom of the mounting plate. Multiple sets of screens are disposed, with the multiple sets of screens arranged in layers from top to bottom between the two frames.

[0010] In the above technical solution, the mesh count of the upper layer screen is smaller than the mesh count of the adjacent lower layer screen.

[0011] In the above technical solution, the connecting rod is fixedly installed on the side wall of the two mounting plates on the right side.

[0012] In the above technical solution, two mounting rods are rotatably connected to the drive rod, and the two mounting rods are respectively fixedly installed on the inner wall of the screening box.

[0013] In the above technical solution, a drive assembly is provided on the rear side of the drive rod. The drive assembly includes: a first synchronous pulley, a rotating shaft, a second synchronous pulley, a synchronous belt, and a motor. The first synchronous pulley is fixedly installed on the rear end of the drive rod. The rotating shaft is rotatably disposed on the rear side wall of the screening box. The second synchronous pulley is fixedly installed on the rotating shaft. The synchronous belt is sleeved on the first synchronous pulley and the second synchronous pulley. The motor is installed on the rear side wall of the screening box, and the output end of the motor is connected to the rotating shaft.

[0014] In the above technical solution, a feeding port is provided on the right side of the top of the screening box, and a discharge port is provided on the left side of the screening box.

[0015] In the above technical solution, a cover is rotatably provided on the right side wall of the screening box.

[0016] The square oscillating sieve for quartz sand of this utility model has the following advantages compared with the prior art:

[0017] I. In the conventional square oscillating screen used in the quartz sand screening process, the vibration and oscillation amplitude of the screen are not adjustable due to the fixed eccentricity of the cam, making it difficult to adapt to the screening needs of quartz sand with different particle sizes and viscosity characteristics. The adjustable eccentric oscillation mechanism adopted in this utility model can flexibly adjust the vibration and oscillation height of each set of screens, adapt to the screening needs of quartz sand with different particle sizes and viscosity characteristics, and can select the screening mode according to the different properties of quartz sand, which is more targeted and flexible, and has a better screening effect for quartz sand with different properties, avoiding the problem of incomplete screening or excessive crushing of some materials.

[0018] Second, in this utility model, cams with different eccentricities are configured, and the appropriate cam can be flexibly moved to the first positioning hole in the middle position for assembly, while the cams of other specifications are moved to the second positioning holes at both ends of the drive rod for positioning respectively; this setting provides sufficient space for the middle cam to play its normal cam driving role, and ensures that the cam in the non-operating state will not interfere with the cam in operation.

[0019] Third, in this utility model, the cam in the non-operating state can be stably positioned at the second positioning hole, and there will be no noise from the cam colliding with the drive rod due to the loosening of the cam during the subsequent rotation of the drive rod, ensuring that the cam can maintain good stability in both the operating and non-operating states, and ensuring the smooth operation of the equipment.

[0020] In summary, the adjustable eccentric swing mechanism of this invention can flexibly adjust the vibration swing height of each set of screens, adapting to the screening needs of quartz sand with different particle sizes and viscosity characteristics. It allows for targeted selection of screening modes, improving screening efficiency and preventing incomplete screening or excessive crushing of materials. By configuring cams with different eccentric distances, the appropriate cam is installed at the first positioning hole in the middle, while the others are positioned at the second positioning holes at both ends of the drive rod. This provides sufficient working space for the central cam, preventing interference from the cam in non-operating states. The cam in non-operating states is stably positioned at the second positioning hole, preventing collision noise caused by loosening when the drive rod rotates. This ensures the stability of the cam in both operating and non-operating states, guaranteeing smooth equipment operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the support frame of this utility model;

[0022] Figure 2 This is a schematic diagram of the material outlet of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the sieve of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the elastic element of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the second positioning hole of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the first positioning hole of this utility model;

[0027] Figures 1 to 6 In the middle, 1. support frame, 2. connecting arm, 3. screening box, 4. feeding port, 5. discharging port, 6. cover, 7. elastic element, 8. mounting plate, 9. frame, 10. screen, 11. connecting rod, 12. connecting piece, 13. mounting rod, 14. drive rod, 15. first positioning hole, 16. second positioning hole, 17. sleeve, 18. cam, 19. positioning pin, 20. first synchronous pulley, 21. rotating shaft, 22. second synchronous pulley, 23. synchronous belt, 24. motor. Detailed Implementation

[0028] The following are specific implementation cases and appendices. Figures 1 to 6 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0029] A square gyratory screen for quartz sand includes two support frames 1, with multiple sets of connecting arms 2 arranged correspondingly front and rear to the two support frames 1. A screening box 3 is disposed between the two support frames 1, and the connecting arms 2 are connected to the screening box 3. It also includes a screening assembly and an adjustable eccentric gyratory mechanism. The adjustable eccentric gyratory mechanism includes: a connecting rod 11, a connecting piece 12, a drive rod 14, a first positioning hole 15, a second positioning hole 16, and an eccentric wheel assembly. The connecting rod 11 is located on the right side of the screening assembly; the connecting piece 12 is installed in the middle of the right side wall of the connecting rod 11; the drive rod 14 is rotatably disposed within the cavity of the screening box 3 from front to back; the first positioning hole 15 is formed through the middle of the drive rod 14, and the first positioning hole... 15 is located below the connecting piece 12; multiple second positioning holes 16 are provided, and the multiple second positioning holes 16 are symmetrically opened on the drive rod 14; multiple eccentric wheel sets are provided, and the multiple eccentric wheel sets are respectively positioned on the drive rod 14; each eccentric wheel set includes: a sleeve 17, a cam 18 and a positioning pin 19, the sleeve 17 is sleeved on the drive rod 14; the cam 18 is fixedly installed on the sleeve 17; the positioning pin 19 is threaded through the outer wall of the sleeve 17, and the outer wall of the positioning pin 19 is provided with an external thread that matches the internal thread of the first positioning hole 15 and the second positioning hole 16; each cam 18 is eccentrically set relative to the drive rod 14, and the eccentricity of each cam 18 is different.

[0030] The adjustable eccentric swing mechanism adopted in this invention can flexibly adjust the vibration swing height of each set of screens 10, adapting to the screening needs of quartz sand with different particle sizes and viscosity characteristics. This mechanism can select the screening mode specifically according to the different properties of the quartz sand, providing greater targeting and flexibility, resulting in better screening effects for quartz sand with different properties, and effectively avoiding the problems of incomplete screening or excessive crushing of some materials.

[0031] This utility model is equipped with cams 18 of various eccentricity specifications. The appropriate cam 18 can be moved to the first positioning hole 15 in the middle position for assembly as needed, while the other cams 18 are moved to the second positioning holes 16 at both ends of the drive rod 14 for positioning. This structure provides sufficient space for the middle cam 18 to perform its cam drive function normally, effectively preventing the non-operating cam 18 from interfering with the operating cam 18.

[0032] In this invention, the cam 18 in the non-operating state can be stably positioned at the second positioning hole 16. During the subsequent rotation of the drive rod 14, there will be no noise from the cam 18 colliding with the drive rod 14 due to loosening, ensuring that the cam 18 can maintain good stability in both the operating and non-operating states, thus ensuring the smooth operation of the equipment.

[0033] The screening assembly is located inside the screening box 3. The assembly includes: elastic elements 7, mounting plates 8, frames 9, and screens 10. Multiple sets of elastic elements 7 are positioned at the four top corners of the screening assembly. The mounting plate 8 is installed at the bottom of the elastic elements 7. Two sets of frames 9 are positioned, one on the left and one on the right, corresponding to the bottom of the mounting plate 8. Multiple sets of screens 10 are arranged in layers between the two frames 9 from top to bottom. The mesh size of the upper screen 10 is smaller than that of the adjacent lower screen 10 to ensure that the quartz sand can be screened layer by layer from top to bottom through multiple screens 10. Connecting rods 11 are fixedly installed on the side walls of the two mounting plates 8 on the right side, providing a location for the installation of other components.

[0034] Two mounting rods 13 are rotatably connected to the drive rod 14 via bearings, and the two mounting rods 13 are fixedly installed on the inner wall of the screening box 3, providing support for the rotation of the drive rod 14.

[0035] A drive assembly is provided on the rear side of the drive rod 14. The drive assembly includes: a first synchronous pulley 20, a rotating shaft 21, a second synchronous pulley 22, a synchronous belt 23, and a motor 24. The first synchronous pulley 20 is fixedly installed on the rear end of the drive rod 14. The rotating shaft 21 is rotatably mounted on the rear side wall of the screening box 3. The second synchronous pulley 22 is fixedly installed on the rotating shaft 21. The synchronous belt 23 is sleeved on the first synchronous pulley 20 and the second synchronous pulley 22. The motor 24 is installed on the rear side wall of the screening box 3, and the output end of the motor 24 is connected to the rotating shaft 21.

[0036] The starter motor 24 can drive the rotating shaft 21 and the second synchronous pulley 22 to rotate, and transmit the rotation to the first synchronous pulley 20 through the synchronous belt 23, thereby driving the drive rod 14 and the cam 18 mounted on it to rotate synchronously. At this time, the cam 18 located below the connecting piece 12 is eccentrically mounted on the drive rod 14. Using the rotational motion of the cam 18, the connecting piece 12, the connecting rod 11, the frame 9 and multiple screens 10 are driven to synchronously perform lifting, swinging and reciprocating vibration. At the same time, the elastic force of the elastic element 7 is used to realize the reset action of each screen 10 and the frame 9, and finally complete the reciprocating swinging vibration screening operation of multiple sets of screens 10.

[0037] A feeding port 4 is located on the top right side of the screening box 3, and a discharge port 5 is located on the left end of the screening box 3. The quartz sand material to be screened is fed into the inner cavity of the screening box 3 through the feeding port 4 for screening. The discharge ports 5 are distributed in layers from top to bottom in an alternating manner, so as to achieve staggered setting of different discharge ports, so as to collect the quartz sand screened from different layers in a staggered manner. A cover 6 is rotatably mounted on the right side wall of the screening box 3 via a pin. By opening the cover 6, it is easier to adjust and assemble the cams 18 of different specifications.

[0038] In addition, the connecting arm 2 includes key components such as connecting columns and universal joints, which are used to connect the support frame 1 and the screening box 3. The support frame 1, connecting arm 2, screening box 3, feeding port 4, and discharge port 5 are all existing technologies. The above components are all components of existing square gyratory screens and adopt commercially available common models. They will not be described in detail or limited here, as long as they meet the normal screening requirements for quartz sand. The elastic element 7 is a commercially available elastic element, which consists of a spring and a telescopic rod. The spring is sleeved on the outside of the telescopic rod. The spring can be compressed or extended under force. The telescopic rod is a commonly used telescopic rod, which consists of two interlocking rods. Under the action of external force, the total length of the telescopic rod can change. The positioning pin 19 consists of a commercially available threaded positioning pin and a nut. It can be threaded through the first positioning hole 15 or the second positioning hole 16, and under the action of the nut, the cam 18 is tightly connected at the first positioning hole 15 or the second positioning hole 16. The first synchronous pulley 20 The second synchronous pulley 22 and the synchronous belt 23 are both commercially available mature models of synchronous pulleys and belts. Their cooperation enables the drive rod 14 to rotate circumferentially. This is existing technology and will not be described or limited here. The motor 24 is a commonly used self-locking motor with a lockable output end. When it stops, the output end can lock itself and will not rotate under external force. The motor 24 is a commonly used forward and reverse motor. Its output end can rotate in the forward or reverse direction according to the usage requirements. It is sufficient to meet the above usage requirements and will not be described or limited here.

[0039] The working principle of a square vibrating screen for quartz sand in this embodiment is as follows:

[0040] Based on the properties of the quartz sand to be screened, adjust the cam 18 of appropriate size to the first positioning hole 15. After adjustment, lock the cam 18 in the first positioning hole 15 with the help of the positioning pin 19. Adjust the other cams 18 of different sizes that are not in operation to the second positioning hole 16 in the front and rear positions along the drive rod 14, and lock the non-operating cams 18 in the second positioning hole 16 with the help of the positioning pin 19 in the corresponding position. In this way, the operating cams 18 are located below the connecting piece 12, and the non-operating cams 18 are disengaged from below the connecting piece 12.

[0041] The quartz sand material to be screened is fed into the inner cavity of the screening box 3 through the feeding port 4 for screening processing; the motor 24 is turned on to drive the rotating shaft 21 and the second synchronous pulley 22 to rotate, and then drive the first synchronous pulley 20 to rotate through the synchronous belt 23, so that the drive rod 14 and the cam 18 on it rotate synchronously; at this time, the cam 18 located below the connecting piece 12 is eccentrically mounted on the drive rod 14. With the help of the rotation of the cam 18, the connecting piece 12, the connecting rod 11, the frame 9 and multiple screens 10 are driven to complete the lifting, swinging and reciprocating vibration synchronously. At the same time, the elastic force of the elastic element 7 drives each screen 10 and the frame 9 to reset, thereby realizing the reciprocating swinging vibration screening operation of multiple sets of screens 10;

[0042] The adjustable eccentric swing mechanism of this invention can flexibly adjust the vibration swing height of each set of screens 10, adapting to the screening needs of quartz sand with different particle sizes and viscosity characteristics. It can select the screening mode in a targeted manner to improve the screening effect and avoid incomplete screening or excessive crushing of materials. It is equipped with cams 18 with different eccentric distances. The appropriate cam 18 is assembled at the first positioning hole 15 in the middle, and the rest are positioned at the second positioning holes 16 at both ends of the drive rod 14. Sufficient working space is reserved for the middle cam 18 to avoid interference of the cam 18 in the non-operating state. The cam 18 in the non-operating state is stably positioned at the second positioning hole 16, which can prevent collision noise caused by loosening when the drive rod 14 rotates, ensuring that the cam 18 is stable in both operating and non-operating states, and ensuring the smooth operation of the equipment.

[0043] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0044] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0045] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0046] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0047] Unless otherwise stated, the term "multiple" means two or more.

[0048] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0049] The term "and / or" describes the relationship between objects, indicating that there can be three relationships. For example, A and / or B means: A or B, or A and B.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A square gyratory screen for quartz sand, comprising two support frames (1), with multiple sets of connecting arms (2) arranged correspondingly front and rear of the two support frames (1), and a screening box (3) disposed between the two support frames (1), wherein the connecting arms (2) are connected to the screening box (3), characterized in that: It also includes a screening assembly and an adjustable eccentric swing mechanism, the adjustable eccentric swing mechanism comprising: A connecting rod (11) is provided on the right side of the screening assembly; A connecting piece (12) is installed on the middle part of the right side wall of the connecting rod (11); A drive rod (14) is rotatably disposed in the inner cavity of the screening box (3) from front to back; The first positioning hole (15) is opened through the middle of the drive rod (14) and is located below the connecting piece (12); The second positioning hole (16) is provided in multiple ways, and the multiple second positioning holes (16) are symmetrically opened on the drive rod (14). The eccentric wheel set is provided in multiple sets, and the multiple sets of the eccentric wheel set are respectively positioned on the drive rod (14).

2. The square oscillating sieve for quartz sand according to claim 1, characterized in that: Each set of eccentric wheels includes: Sleeve (17), which is sleeved on the drive rod (14); Cam (18), which is fixedly mounted on the sleeve (17); The positioning pin (19) is threaded through the outer wall of the sleeve (17), and the outer wall of the positioning pin (19) is provided with an external thread that is compatible with the internal threads of the first positioning hole (15) and the second positioning hole (16).

3. A square vibrating screen for quartz sand according to claim 2, characterized in that: Each of the cams (18) is eccentrically positioned relative to the drive rod (14), and the eccentricity of each cam (18) is different from that of the others.

4. A square vibrating screen for quartz sand according to claim 3, characterized in that: The screening assembly is disposed in the inner cavity of the screening box (3), and the screening assembly includes: Elastic element (7), wherein multiple sets of elastic element (7) are provided, and the multiple sets of elastic element (7) are respectively provided at the top four corners of the screening component; Mounting plate (8), which is mounted on the bottom end of the elastic member (7); The frame (9) is provided in two sets, and the two sets of the frame (9) are respectively arranged on the left and right sides at the bottom of the mounting plate (8); The screen (10) is provided in multiple sets, and the multiple sets of screens (10) are arranged in layers from top to bottom between the two frames (9).

5. A square vibrating screen for quartz sand according to claim 4, characterized in that: The mesh count of the upper sieve (10) is less than the mesh count of the adjacent lower sieve (10).

6. A square vibrating screen for quartz sand according to claim 4, characterized in that: The connecting rod (11) is fixedly installed on the side wall of the two mounting plates (8) on the right side.

7. A square vibrating sieve for quartz sand according to claim 1, characterized in that: Two mounting rods (13) are rotatably connected to the drive rod (14), and the two mounting rods (13) are respectively fixedly installed on the inner wall of the screening box (3).

8. A square vibrating screen for quartz sand according to claim 6, characterized in that: A drive assembly is provided on the rear side of the drive rod (14), the drive assembly including: The first synchronous pulley (20) is fixedly installed at the rear end of the drive rod (14); A rotating shaft (21) is rotatably mounted on the rear side wall of the screening box (3); The second synchronous pulley (22) is fixedly mounted on the rotating shaft (21); Synchronous belt (23), which is sleeved on the first synchronous pulley (20) and the second synchronous pulley (22); The motor (24) is installed on the rear side wall of the screening box (3), and the output end of the motor (24) is connected to the rotating shaft (21).

9. A square vibrating sieve for quartz sand according to claim 1, characterized in that: The screening box (3) has a feeding port (4) on the right side of the top and a discharge port (5) on the left side.

10. A square vibrating sieve for quartz sand according to claim 1, characterized in that: The screening box (3) has a cover (6) that is rotatably mounted on the right side wall.

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