Screening device for color sand production and processing

Abstract

The utility model relates to the technical field of colored sand production and processing, and particularly discloses a screening device for colored sand production and processing, which comprises a bottom plate, a screening box with an opening structure on the right side is obliquely arranged above the bottom plate, two U-shaped grooves distributed up and down are formed in the inner wall of the screening box, and U-shaped frames matched with the U-shaped grooves are inserted into the two U-shaped grooves. Sieve plates are fixedly connected to the interiors of the two U-shaped frames; the arc-shaped plates, the spring steel sheets and the movable plates form a circular ring, and the arc-shaped plates, the spring steel sheets and the movable plates cannot be separated from the interiors of the arc-shaped grooves even under the condition of high-frequency vibration, so that it can be guaranteed that the positions of the two sieve plates cannot move, and the purpose of improving the sieve plate fixing effect is achieved; the two limiting plates are separated from the interiors of the two limiting grooves, the two U-shaped frames can be separated from the interiors of the two U-shaped grooves correspondingly, the two screen plates are separated from the interior of the screening box, dismounting of the screen plates and the U-shaped frames is completed, and therefore the purpose of conveniently dismounting, mounting and replacing the screen plates is achieved.

Description

Technical Field

[0001] This utility model relates to the field of colored sand production and processing technology, and specifically discloses a screening device for colored sand production and processing. Background Technology

[0002] Colored sand is a decorative material made by dyeing and coating natural quartz sand or manufactured sand. It is widely used in construction, artistic coatings and other fields. Screening is a key process in the production of colored sand, which requires separating sand particles of different sizes to meet customer needs.

[0003] In existing technologies, the main structure of colored sand screening operations consists of screens installed at different heights. These screens are typically installed at an angle and fixed inside the machine housing with several bolts. The working principle is based on the vibration of the screens. When colored sand is placed on the screens, larger particles cannot pass through the screen mesh and will slide down the inclined screen surface under the combined action of vibration and gravity. Smaller particles, on the other hand, can pass through the screen mesh and fall downwards. In this way, the effective separation of colored sand of different particle sizes is achieved, thereby meeting the customer's needs for colored sand of different particle sizes.

[0004] With the rapid development of technology, colored sand, due to its resin or metal oxide coating, has a significantly higher hardness than ordinary sand and gravel. During the screening process, the high-hardness colored sand frequently comes into contact with and rubs against the screen, easily causing damage to the screen. Furthermore, since the screen is fixed inside the machine housing with several bolts, when the screen needs to be replaced, the operator must first open the machine housing and then remove multiple bolts, making the entire process cumbersome and inconvenient. In addition, the bolts used for fixing are prone to loosening under high-frequency vibration, which will affect the fixing effect on the screen. Therefore, a screening device for colored sand production and processing is needed to solve this problem. Utility Model Content

[0005] This utility model proposes a screening device for colored sand production and processing, which has the characteristics of convenient disassembly and replacement of the screen plate and improved screen plate fixing effect.

[0006] This utility model is implemented as follows: a screening device for colored sand production and processing includes a base plate, a screening box with an open structure on the right side is inclinedly arranged above the base plate, two U-shaped grooves distributed vertically are opened on the inner wall of the screening box, a matching U-shaped frame is inserted into the inside of each of the two U-shaped grooves, a screen plate is fixedly connected inside the inside of each of the two U-shaped frames, and a limit mechanism is provided on the left side of each of the two U-shaped frames.

[0007] The two limiting mechanisms include through slots that pass through the left ends of the inner walls of the two U-shaped grooves respectively. The left ends of the two U-shaped frames are each fixedly connected to a connecting plate that passes through the two through slots respectively. The left end of the screening box has two vertically distributed sliding grooves. The interior of each of the two sliding grooves is slidably connected to a slider. The left ends of each of the two sliders are fixedly connected to a lifting block. The upper ends of the two connecting plates are each through-cut with a limiting slot. The lower ends of the two lifting blocks are each fixedly connected to a limiting plate that passes through the two limiting slots respectively. The bottom of each of the two connecting plates is provided with an anti-loosening mechanism.

[0008] The two anti-loosening mechanisms include arc-shaped grooves that pass through the outer walls of the two limiting plates respectively. Arc-shaped plates are inserted into the interior of the two arc-shaped grooves. A spring steel sheet is fixedly connected to one end of each of the two arc-shaped plates, and a movable plate is fixedly connected to the other end of each of the two spring steel sheets.

[0009] A vibration mechanism is provided on the upper side of the base plate.

[0010] As a preferred embodiment of the screening device for colored sand production and processing according to this utility model, the vibration mechanism includes a connecting seat fixedly connected to the lower end of the screening box, and vibration springs fixedly connected to the bottom plate at the four corners of the lower end face of the connecting seat. Vibration motors are installed on both the front and rear sides of the screening box.

[0011] As a preferred embodiment of the screening device for colored sand production and processing according to this utility model, a side plate is fixedly connected to the right side of the screening box, and two guide plates distributed vertically are fixedly connected between the left and right sides of the inner wall of the screening box and the left end of the side plate, with the two guide plates located below the two screen plates respectively.

[0012] As a preferred embodiment of the screening device for colored sand production and processing according to this utility model, the front end of the side plate is provided with three vertically distributed through openings. The front and rear sides of the upper end of the two screen plates are fixedly connected with first guide plates that fit against the front and rear sides of the inner wall of the screening box. Two first guide plates at the same height form a group. The two groups of first guide plates pass through the through openings located on the upper side and the middle, respectively. The front and rear sides of the inner wall of the screening box are fixedly connected with second guide plates. The two second guide plates pass through the through opening located on the lower side. The lower ends of the two second guide plates and the right end of the bottom plate are fixedly connected with anti-fall plates.

[0013] As a preferred embodiment of the screening device for colored sand production and processing according to this utility model, the outer wall of the arc-shaped plate is provided with an abutment groove, and the other end of the movable plate is fixedly connected to an abutment block located inside the abutment groove.

[0014] As a preferred embodiment of the screening device for colored sand production and processing according to this utility model, the chute and the slider are mutually matched dovetail-shaped structures.

[0015] As a preferred embodiment of the screening device for colored sand production and processing according to this utility model, multiple mesh holes are provided through the upper ends of both screen plates, and the mesh hole diameter of the upper screen plate is larger than that of the lower screen plate.

[0016] The beneficial effects of this utility model are:

[0017] When installing the two screen plates, move the two limiting plates upwards, then insert the two U-shaped frames into the two U-shaped grooves respectively. The two screen plates will then enter the screening box, preventing them from moving up, down, forward, or backward. When the two U-shaped frames abut against the left side of the two U-shaped grooves, the two limiting plates will align with the positions of the two limiting grooves. Then, move the two limiting plates downwards and pass through the interiors of the two limiting grooves, preventing the screen plates from moving left or right. When the movable plate is pulled, the abutment blocks will... When the inner part of the groove is disengaged, the spring steel sheet will undergo elastic deformation, allowing the two arc plates to be inserted into the two arc grooves respectively. At this time, the two spring steel sheets will return to their original state due to elasticity, preventing the limiting plate from disengaging from the two limiting grooves, thus completing the installation of the two screen plates. At this time, the arc plate, spring steel sheet, and movable plate will form a ring. Even under high-frequency vibration, the arc plate, spring steel sheet, and movable plate will not disengage from the inside of the arc groove, thereby ensuring that the position of the two screen plates will not move, further improving the fixing effect of the screen plates.

[0018] When removing the two screen plates, detach the two arc-shaped plates from the two arc-shaped grooves, and then detach the two limiting plates from the two limiting grooves. This allows the two U-shaped frames to detach from the two U-shaped grooves, and the two screen plates to detach from the screening box. This completes the disassembly of the screen plates along with the U-shaped frames. Combined with the screen plate installation steps, this facilitates the disassembly and replacement of the screen plates. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a front sectional view of the overall structure of a screening device for colored sand production and processing according to this utility model;

[0021] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3This is a diagram showing the external connection structure of the screening box in this utility model;

[0023] Figure 4 This is a diagram of the external connection structure of the arc-shaped plate of this utility model.

[0024] The markings in the diagram are: 1. Base plate; 2. Screening box; 3. U-shaped trough; 4. U-shaped frame; 5. Screen plate; 6. Slide chute; 7. Sliding block; 8. Lifting block; 9. Through groove; 10. Connecting plate; 11. Limiting groove; 12. Limiting plate; 13. Arc groove; 14. Arc plate; 15. Spring steel sheet; 16. Movable plate; 17. Abutment groove; 18. Abutment block; 19. First guide plate; 20. Second guide plate; 21. Vibration spring; 22. Vibration motor; 23. Side plate; 24. Guide plate; 25. Through port; 26. Connecting seat. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0026] Please see Figures 1-4 A screening device for colored sand production and processing includes a base plate 1. A screening box 2 with an open right side is inclinedly arranged above the base plate 1. Two U-shaped grooves 3 are provided on the inner wall of the screening box 2. A matching U-shaped frame 4 is inserted into the inside of each U-shaped groove 3. A screen plate 5 is fixedly connected inside the inside of each U-shaped frame 4. A limit mechanism is provided on the left side of each U-shaped frame 4.

[0027] The two limiting mechanisms include through grooves 9 that pass through the left ends of the inner walls of the two U-shaped grooves 3 respectively. The left ends of the two U-shaped frames 4 are fixedly connected to connecting plates 10 that pass through the two through grooves 9 respectively. The left end of the screening box 2 has two vertically distributed sliding grooves 6. The interior of the two sliding grooves 6 is slidably connected to sliders 7. The left ends of the two sliders 7 are fixedly connected to lifting blocks 8. The upper ends of the two connecting plates 10 are both through-grooves 11. The lower ends of the two lifting blocks 8 are both fixedly connected to limiting plates 12 that pass through the two limiting grooves 11 respectively. The bottom of the two connecting plates 10 is provided with an anti-loosening mechanism.

[0028] The two anti-loosening mechanisms include arc-shaped grooves 13 that pass through the outer walls of the two limiting plates 12 respectively. Arc plates 14 are inserted into the interior of the two arc-shaped grooves 13. Spring steel plates 15 are fixedly connected to one end of the two arc plates 14, and movable plates 16 are fixedly connected to the other end of the two spring steel plates 15.

[0029] A vibration mechanism is installed on the upper side of the base plate 1.

[0030] In this embodiment: when installing the two screen plates 5, firstly, the two limiting plates 12 and the two lifting blocks 8 move upward along with the two sliders 7, so that the two sliders 7 abut against the top of the inner wall of the two sliding grooves 6. Then, the two U-shaped frames 4 are respectively inserted into the interior of the two U-shaped grooves 3, and the two screen plates 5 will enter the interior of the screening box 2. Since the two U-shaped frames 4 match the two U-shaped grooves 3, the two screen plates 5 can be prevented from moving in the up, down, front, and back directions. When the two U-shaped frames 4 abut against the left side of the interior of the two U-shaped grooves 3, the two connecting plates 10 will pass through the interior of the two through grooves 9, and the two limiting plates 12 will correspond to the positions of the two limiting grooves 11. Subsequently, the two limiting plates 12 and the two lifting blocks... 8. As the two sliders 7 move downward, the two limiting plates 12 pass through the interior of the two limiting grooves 11 respectively. Since the two limiting plates 12 match the two limiting grooves 11, the two screen plates 5 can be prevented from moving to the left or right. Since the two spring steel sheets 15 are elastic, when the movable plate 16 is pulled, the abutment block 18 will disengage from the interior of the abutment groove 17. The spring steel sheets 15 will undergo elastic deformation, so that the two arc plates 14 can be inserted into the interior of the two arc grooves 13 respectively. At this time, the two spring steel sheets 15 will return to their original state due to elasticity, and then the two abutment blocks 18 will enter the interior of the two abutment grooves 17 respectively, preventing the limiting plates 12 from disengaging from the two limiting grooves 11, thus completing the installation of the two screen plates 5.

[0031] At this time, the arc plate 14, the spring steel sheet 15 and the movable plate 16 will form a ring. Even under high frequency vibration, the arc plate 14, the spring steel sheet 15 and the movable plate 16 will not detach from the inside of the arc groove 13, thereby ensuring that the positions of the two screen plates 5 will not move, and further achieving the purpose of improving the fixing effect of the screen plates 5.

[0032] When the two screen plates 5 are to be removed, pull the two movable plates 16 respectively, so that the two abutting blocks 18 will disengage from the inside of the two abutting grooves 17, and the two arc plates 14 will disengage from the inside of the two arc grooves 13 respectively. Then, the two limiting plates 12 and the two lifting blocks 8 will move upward with the two sliders 7 until the two limiting plates 12 disengage from the inside of the two limiting grooves 11. This allows the two U-shaped frames 4 to disengage from the inside of the two U-shaped grooves 3 respectively, and the two screen plates 5 to disengage from the inside of the screening box 2, thus completing the disassembly of the screen plates 5 together with the U-shaped frames 4. Combined with the above installation steps for the screen plates 5, this achieves the purpose of facilitating the disassembly and replacement of the screen plates 5.

[0033] After the two screen plates 5 are installed, the vibration mechanism drives the screening box 2 to vibrate, which in turn drives the two screen plates 5 to vibrate. Since the two screen plates 5 are set at an inclination, after the colored sand is put into the screening box 2 through the feed port set at the upper end of the screening box 2, due to the vibration effect, the colored sand with a larger particle size will slide directly from the upper end of the upper screen plate 5 to the right. Other colored sand will fall from the mesh of the upper screen plate 5 to the upper end of the lower screen plate 5. The colored sand with a medium particle size will slide from the upper end of the lower screen plate 5 to the right. The colored sand with the smallest particle size will fall to the bottom of the screening box 2 and slide to the right from the bottom of the screening box 2. In this way, colored sand of different particle sizes can be screened.

[0034] As a technical optimization of this utility model, the vibration mechanism includes a connecting seat 26 fixedly connected to the lower end of the screening box 2, and vibration springs 21 fixedly connected to the base plate 1 at the four corners of the lower end face of the connecting seat 26. Vibration motors 22 are installed on both the front and rear sides of the screening box 2.

[0035] In this embodiment: two vibration motors 22 are started, and due to the setting of four vibration springs 21, the screening box 2 can be made to vibrate. Due to the setting of the connecting seat 26, the lower end of the connecting seat 26 is parallel to the upper end of the bottom plate 1.

[0036] As a technical optimization of this utility model, a side plate 23 is fixedly connected to the right side inside the screening box 2. Two guide plates 24 distributed vertically are fixedly connected between the left and right sides of the inner wall of the screening box 2 and the left end of the side plate 23. The two guide plates 24 are located below the two screen plates 5 respectively.

[0037] In this embodiment: by setting the side plate 23, the material falling from the mesh of the two screen plates 5 is prevented from rolling down the right side of the screening box 2. The upper guide plate 24 is set to guide the colored sand falling from the mesh of the upper screen plate 5 to the left side of the screening box 2, thereby effectively utilizing the lower screen plate 5. The lower guide plate 24 is set to guide the colored sand with the smallest particle size to the left side of the screening box 2, preventing the falling colored sand from splashing out directly from the bottom through-hole 25.

[0038] As a technical optimization of this utility model, the front end of the side plate 23 is provided with three vertically distributed through openings 25. The front and rear sides of the upper end of the two screen plates 5 are fixedly connected with the front and rear sides of the inner wall of the screening box 2. The two first guide plates 19 at the same height form a group. The two groups of first guide plates 19 pass through the through openings 25 located on the upper side and the middle side, respectively. The front and rear sides of the inner wall of the screening box 2 are fixedly connected with the second guide plates 20. The two second guide plates 20 pass through the through opening 25 located on the lower side. The lower ends of the two second guide plates 20 and the right end of the bottom plate 1 are fixedly connected with the anti-fall plate.

[0039] In this embodiment: by setting two sets of first guide plates 19, the colored sand at the top of the two screen plates 5 is guided to one place, thereby facilitating the collection of colored sand. By setting two second guide plates 20 in conjunction with the anti-fall plate, the colored sand on the bottom side of the inner wall of the screening box 2 is guided to one place, thereby facilitating the collection of colored sand.

[0040] As a technical optimization of this utility model, the outer wall of the arc plate 14 is provided with an abutment groove 17, and the other end of the movable plate 16 is fixedly connected to an abutment block 18 located inside the abutment groove 17.

[0041] In this embodiment, the abutment groove 17 and the abutment block 18 are provided to limit the movement position of the movable plate 16.

[0042] As a technical optimization of this utility model, the slide groove 6 and the slider 7 are dovetail-shaped structures that match each other.

[0043] In this embodiment: Since the slide groove 6 and the slider 7 are mutually matched dovetail structures, the slider 7 is prevented from detaching from the inside of the slide groove 6.

[0044] As a technical optimization of this utility model, multiple mesh holes are provided through the upper ends of both sieve plates 5, and the mesh hole diameter of the upper sieve plate 5 is larger than that of the lower sieve plate 5.

[0045] In this embodiment: Since the mesh diameter of the upper sieve plate 5 is larger than that of the lower sieve plate 5, the colored sand can be graded and screened.

[0046] The working principle and usage process of this utility model are as follows: When installing the two screen plates 5, firstly, the two limiting plates 12 and the two lifting blocks 8 move upward along with the two sliders 7, so that the two sliders 7 abut against the top of the inner wall of the two sliding grooves 6. Then, the two U-shaped frames 4 are respectively inserted into the interior of the two U-shaped grooves 3, and the two screen plates 5 will enter the interior of the screening box 2. Since the two U-shaped frames 4 match the two U-shaped grooves 3, the two screen plates 5 can be prevented from moving in the up, down, forward, and backward directions. When the two U-shaped frames 4 abut against the left side of the interior of the two U-shaped grooves 3, the two connecting plates 10 will pass through the interior of the two through grooves 9, and the two limiting plates 12 will correspond to the positions of the two limiting grooves 11. Subsequently, the two limiting plates 12 and As the two lifting blocks 8 move downward along with the two sliders 7, the two limiting plates 12 pass through the interior of the two limiting grooves 11 respectively. Since the two limiting plates 12 match the two limiting grooves 11, the two screen plates 5 can be prevented from moving to the left or right. Since the two spring steel sheets 15 are elastic, when the movable plate 16 is pulled, the abutment block 18 will disengage from the interior of the abutment groove 17. The spring steel sheets 15 will undergo elastic deformation, so that the two arc plates 14 can be inserted into the interior of the two arc grooves 13 respectively. At this time, the two spring steel sheets 15 will return to their original state due to elasticity, and then the two abutment blocks 18 will enter the interior of the two abutment grooves 17 respectively, preventing the limiting plates 12 from disengaging from the two limiting grooves 11, thus completing the installation of the two screen plates 5.

[0047] At this time, the arc plate 14, the spring steel sheet 15 and the movable plate 16 will form a ring. Even under high frequency vibration, the arc plate 14, the spring steel sheet 15 and the movable plate 16 will not detach from the inside of the arc groove 13, thereby ensuring that the positions of the two screen plates 5 will not move, and further achieving the purpose of improving the fixing effect of the screen plates 5.

[0048] When the two screen plates 5 are to be removed, pull the two movable plates 16 respectively, so that the two abutting blocks 18 will disengage from the inside of the two abutting grooves 17, and the two arc plates 14 will disengage from the inside of the two arc grooves 13 respectively. Then, the two limiting plates 12 and the two lifting blocks 8 will move upward with the two sliders 7 until the two limiting plates 12 disengage from the inside of the two limiting grooves 11. This allows the two U-shaped frames 4 to disengage from the inside of the two U-shaped grooves 3 respectively, and the two screen plates 5 to disengage from the inside of the screening box 2, thus completing the disassembly of the screen plates 5 together with the U-shaped frames 4. Combined with the above installation steps for the screen plates 5, this achieves the purpose of facilitating the disassembly and replacement of the screen plates 5.

[0049] After the two screen plates 5 are installed, the two vibration motors 22 are started. Due to the setting of four vibration springs 21, the screening box 2 is made to vibrate, which in turn drives the two screen plates 5 to vibrate. Since the two screen plates 5 are set at an inclination, after the colored sand is put into the screening box 2 through the feed port set at the upper end of the screening box 2, due to the vibration effect, the colored sand with a larger particle size will slide directly from the upper end of the upper screen plate 5 to the right. Other colored sand will fall from the mesh of the upper screen plate 5 to the upper end of the lower screen plate 5. The colored sand with a medium particle size will slide from the upper end of the lower screen plate 5 to the right. The colored sand with the smallest particle size will fall to the bottom of the screening box 2 and slide to the right from the bottom of the screening box 2. In this way, colored sand of different particle sizes can be screened.

[0050] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0051] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A screening device for colored sand production and processing, comprising a base plate (1), wherein a screening box (2) with an open right side is inclinedly arranged above the base plate (1), characterized in that: The inner wall of the screening box (2) has two U-shaped grooves (3) distributed vertically. A matching U-shaped frame (4) is inserted into the inside of each of the two U-shaped grooves (3). A screen plate (5) is fixedly connected inside the inside of each of the two U-shaped frames (4). A limit mechanism is provided on the left side of each of the two U-shaped frames (4). The two limiting mechanisms include through slots (9) that pass through the left end of the inner wall of the two U-shaped slots (3), and connecting plates (10) that pass through the two through slots (9) are fixedly connected to the left end of the two U-shaped frames (4). The left end of the screening box (2) has two vertically distributed sliding grooves (6). The interior of the two sliding grooves (6) is slidably connected to sliders (7). The left end of the two sliders (7) is fixedly connected to lifting blocks (8). The upper end of the two connecting plates (10) has a limiting slot (11) that passes through the two limiting slots (11). The lower end of the two lifting blocks (8) is fixedly connected to a limiting plate (12) that passes through the two limiting slots (11). The bottom of the two connecting plates (10) is provided with an anti-loosening mechanism. The two anti-loosening mechanisms include arc-shaped grooves (13) that pass through the outer walls of the two limiting plates (12), and arc-shaped plates (14) are inserted into the interior of the two arc-shaped grooves (13). A spring steel sheet (15) is fixedly connected to one end of the two arc-shaped plates (14), and a movable plate (16) is fixedly connected to the other end of the two spring steel sheets (15). A vibration mechanism is provided on the upper side of the base plate (1).

2. The screening device for colored sand production and processing according to claim 1, characterized in that: The vibration mechanism includes a connecting seat (26) fixedly connected to the lower end of the screening box (2). Vibration springs (21) fixedly connected to the bottom plate (1) are fixedly connected to the four corners of the lower end face of the connecting seat (26). Vibration motors (22) are installed on the front and rear sides of the screening box (2).

3. The screening device for colored sand production and processing according to claim 1, characterized in that: A side plate (23) is fixedly connected to the right side inside the screening box (2). Two guide plates (24) are fixedly connected between the left and right sides of the inner wall of the screening box (2) and the left end of the side plate (23). The two guide plates (24) are located below the two screen plates (5).

4. A screening device for colored sand production and processing according to claim 3, characterized in that: The front end of the side plate (23) is provided with three vertically distributed through openings (25). The front and rear sides of the upper end of the two screen plates (5) are fixedly connected with the first guide plates (19) that fit against the front and rear sides of the inner wall of the screening box (2). The two first guide plates (19) at the same height are a group. The two groups of first guide plates (19) pass through the through openings (25) located on the upper side and the middle side, respectively. The front and rear sides of the inner wall of the screening box (2) are fixedly connected with the second guide plates (20). The two second guide plates (20) pass through the through opening (25) located on the lower side. The lower ends of the two second guide plates (20) and the right end of the bottom plate (1) are fixedly connected with the anti-fall plate.

5. A screening device for colored sand production and processing according to claim 1, characterized in that: The outer wall of the arc plate (14) is provided with an abutment groove (17), and the other end of the movable plate (16) is fixedly connected to an abutment block (18) located inside the abutment groove (17).

6. A screening device for colored sand production and processing according to claim 1, characterized in that: The groove (6) and the slider (7) are dovetail-shaped structures that match each other.

7. A screening device for colored sand production and processing according to claim 1, characterized in that: Both of the sieve plates (5) have multiple mesh holes through their upper ends, with the mesh hole diameter of the upper sieve plate (5) being larger than that of the lower sieve plate (5).

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