Screen for screening machine
By adopting structural designs such as retaining rings, pressure bars, limiting bars, and guide bars in the screening machine, the problems of difficult screen replacement and low screening accuracy are solved, realizing convenient screen replacement and full screening of materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANDAN HANRUNDA REFRACTORY CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-05-01
AI Technical Summary
Existing screening machines have high screen replacement costs and poor material screening accuracy, resulting in difficult maintenance and poor screening effect.
A screen for a screening machine was designed, which adopts a structure of multiple retaining rings and pressure bars to facilitate the disassembly and replacement of the screen assembly. The screen plate is fixed by a limiting rod and a slot, and the combination of guide strips and annular rubber strips improves the screening accuracy.
It enables convenient replacement of screens and thorough screening of materials, improving screening accuracy and reducing maintenance costs.
Smart Images
Figure CN224181360U_ABST
Abstract
Description
A type of screen for screening machines Technical Field
[0001] This utility model relates to the field of screening equipment technology, and in particular to a screen for a screening machine. Background Technology
[0002] The process of separating loose materials into different particle sizes by passing them through one or more screen boxes is called screening. A screening machine is a vibrating screening machine that uses the relative motion between the loose material and the screen surface to allow some particles to pass through the screen holes, separating materials such as sand, gravel, and crushed stone into different grades according to particle size.
[0003] In existing technology, the screen box of a screening machine includes a cylinder (generally made of rolled steel plate), with a discharge port connected to one side of the cylinder and a screen fixed to one end for screening materials. However, to ensure the strength of the screen, the outer edge of the screen is usually welded to the cylinder. But when the screen needs maintenance or replacement, it needs to be cut and a new screen re-welded, resulting in high replacement costs. In addition, after the material enters the surface of the screen, the vibration of the screening machine may cause some material to be discharged from the discharge port without being fully screened, resulting in poor material screening accuracy. Summary of the Invention
[0004] The main purpose of this utility model is to provide a screen for a screening machine to solve the problems of high screen replacement cost and poor material screening accuracy in the prior art.
[0005] To solve the above problems, the present invention adopts the following technical solution: a screen for a screening machine, which is set inside a screen box, characterized in that there are multiple screen boxes stacked together, each screen box has a retaining ring on its inner wall, a screen assembly is attached to each retaining ring, and multiple pressure rods are provided at the bottom end of each retaining ring. The multiple pressure rods are evenly arranged around the circumference of the retaining ring, and the free end of each pressure rod extends vertically downward and abuts against the screen assembly located in the lower layer. Each screen assembly includes a screen plate and a guide strip fixed to the top surface of the screen plate.
[0006] Furthermore, the screen box is characterized by having a discharge port on one side, and two limiting rods fixedly mounted on the top surface of the retaining ring on one side of the discharge port. The two limiting rods are spaced apart, and the screen plate is provided with slots that are adapted to the two limiting rods. When the screen plate is placed on the top surface of the retaining ring, the two limiting rods are respectively inserted into the two slots.
[0007] Furthermore, the guide bar includes a C-shaped segment and an arc-shaped segment. The open end of the C-shaped segment faces the central axis of the screen plate. One end of the arc-shaped segment is fixedly connected to the end of the C-shaped segment near the discharge port. The other end of the arc-shaped segment extends between the two limiting rods.
[0008] Furthermore, the guide strip is fixedly connected to the sieve plate by multiple connectors, and the multiple connectors are evenly arranged along the extension direction of the guide strip.
[0009] Furthermore, each of the connecting components includes a U-shaped plate and a horizontal plate fixed to one side of the bottom of the U-shaped plate. The U-shaped plate covers the outside of the guide strip, and the horizontal plate is fixedly connected to the screen plate by bolts.
[0010] Furthermore, an annular rubber strip is fixed to the outer edge of the top surface of the sieve plate, and the outer side of the annular rubber strip abuts against the inner wall of the sieve box.
[0011] Furthermore, the cross-section of the annular rubber strip is a right-angled triangle, and the two right-angled sides of the right-angled triangle abut against the inner wall of the sieve box and the sieve plate, respectively.
[0012] The beneficial effects of this utility model are:
[0013] 1. Multiple pressure bars and retaining rings are set to facilitate the disassembly and replacement of the screen assembly. At the same time, a limit rod is set in conjunction with a slot to prevent the screen plate from rotating.
[0014] 2. By setting guide bars, materials that have just fallen onto the surface of the screen are prevented from entering the discharge port before being fully screened, thus ensuring that the materials are fully screened and improving the screening accuracy. Attached Figure Description
[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0016] Figure 1 is a schematic diagram of the installation structure of the screen for the screening machine of this utility model;
[0017] Figure 2 is a schematic diagram of the exploded structure of the screen and screen box;
[0018] Figure 3 is a top view of Figure 1.
[0019] Explanation of reference numerals in the attached figures
[0020] 1. Screen box; 11. Retaining ring; 12. Pressure bar; 13. Discharge port; 14. Limiting rod; 15. Box cover; 151. Feed port; 2. Screen assembly; 21. Screen plate; 211. Slot; 3. Guide bar; 31. C-shaped section; 32. Arc-shaped section; 33. Connecting piece; 331. U-shaped plate; 332. Horizontal plate; 333. Bolt; 4. Annular rubber strip. Detailed Implementation
[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0022] Please refer to Figures 1 and 2. A screen for a screening machine is installed inside a screen box 1 for screening materials. In the prior art, there are multiple screen boxes 1, which are stacked to screen materials of different fineness. Each screen box 1 has a retaining ring 11 on its inner wall, and a screen assembly 2 is attached to each retaining ring 11, thereby facilitating the disassembly and replacement of the screen assembly 2. In this embodiment, each retaining ring 11 has multiple pressure rods 12 at its bottom end, which are used to compress the screen and prevent it from moving up and down.
[0023] Specifically, multiple pressure rods 12 are evenly arranged around the circumference of the retaining ring 11, and the free end of each pressure rod 12 extends vertically downward and abuts against the screen assembly 2 located in the lower layer. That is, since there are multiple screen boxes 1, the screen assembly 2 is fixed by multiple pressure rods 12 at the bottom of the adjacent screen box 1 above. In other words, the screen assembly 2 is confined between the multiple pressure rods 12 and the retaining ring 11. It should be noted that the top screen box 1 is closed by a box cover 15, and the bottom outer edge of the box cover 15 is provided with multiple pressure rods 12, thereby preventing the top screen assembly 2 from shaking up and down.
[0024] In this embodiment, each screen assembly 2 includes a screen plate 21. A discharge port 13 is provided on one side of the screen box 1. Two limiting rods 14 are fixedly mounted on the top surface of the retaining ring 11 on one side of the discharge port 13. The two limiting rods 14 are spaced apart. The screen plate 21 is provided with slots 211 that are adapted to the two limiting rods 14. When the screen plate 21 is placed on the top surface of the retaining ring 11, the two limiting rods 14 are respectively inserted into the two slots 211. This prevents the screen plate 21 from rotating.
[0025] In this embodiment, a guide strip 3 is fixedly provided on the top surface of the screen plate 21 to guide the material on the screen, preventing material that has just fallen onto the surface of the screen from entering the discharge port 13 before being fully screened, thus avoiding poor material screening accuracy. Specifically, the guide strip 3 includes a C-shaped section 31 and an arc-shaped section 32. The open end of the C-shaped section 31 faces the central axis of the screen plate 21, one end of the arc-shaped section 32 is fixedly connected to the end of the C-shaped section 31 near the discharge port 13, and the other end of the arc-shaped section 32 extends between the two limiting rods 14. It should be noted that by setting the guide strip 3, the screen plate 21 is divided into a screening space and a transmission space. The space on the side of the C-shaped section 31 away from its opening direction is the transmission space, while the side facing the opening direction of the C-shaped section 31 is the screening space.
[0026] It should be noted that, as shown in Figure 3, the central axis of the feed inlet 151 of the cover 15 is collinear with the central axis of the screen plate 21. Based on this, the material falls from the feed inlet 151 into the central area of the screen, i.e., into the screening space. After the screening machine starts, the screen box 1 swings, causing the material to move in a spiral involute along the screen surface, spreading from the center to the outer edge (this is existing technology), as shown by the arrow in Figure 3. When the material is screened from the screening space, it cannot enter the transmission space due to the obstruction of the guide strip 3. Consequently, the unscreened material cannot directly enter the discharge port 13. As the screening machine continues to rotate, the material slowly moves from the screening space to the transmission space and is discharged from the discharge port 13 after passing through the transmission space. During this process, the material can be fully screened, thereby improving the material screening accuracy.
[0027] In this embodiment, the guide strip 3 is fixedly connected to the screen plate 21 by multiple connectors 33, which are evenly arranged along the extension direction of the guide strip 3. Specifically, each connector 33 includes a U-shaped plate 331 and a horizontal plate 332 fixed to one side of the bottom of the U-shaped plate 331. The U-shaped plate 331 covers the outside of the guide strip 3, and the horizontal plate 332 is fixedly connected to the screen plate 21 by bolts 333. This facilitates the subsequent disassembly and maintenance of the guide strip 3.
[0028] Preferably, an annular rubber strip 4 is fixedly provided on the outer edge of the top surface of the sieve plate 21, and the outer side of the annular rubber strip 4 abuts against the inner wall of the sieve box 1. By providing the annular rubber strip 4, material is prevented from getting stuck between the sieve plate 21 and the inner wall of the sieve box 1. In this embodiment, the cross-section of the annular rubber strip 4 is a right-angled triangle, and the two right-angled sides of the right-angled triangle abut against the inner wall of the sieve box 1 and the sieve plate 21, respectively. In this way, when the material moves to the annular rubber strip 4, it can slide back down along the inclined surface of the annular rubber strip 4 into the sieve.
[0029] The above description is only a preferred embodiment of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
Claims
1. A screen for a screening machine, arranged in a screen box (1), characterized in that There are multiple screen boxes (1), and the multiple screen boxes (1) are stacked. Each screen box (1) has a retaining ring (11) on its inner wall. Each retaining ring (11) has a screen assembly (2) attached to it. Each retaining ring (11) has multiple pressure rods (12) at its bottom end. The multiple pressure rods (12) are evenly arranged along the circumference of the retaining ring (11), and the free end of each pressure rod (12) extends vertically downward and abuts against the screen assembly (2) located in the lower layer. Each screen assembly (2) includes a screen plate (21) and a guide strip (3) fixed on the top surface of the screen plate (21).
2. The screen for a screening machine according to claim 1, characterized in that The screen box (1) has a discharge port (13) on one side. The top surface of the retaining ring (11) is fixed with two limiting rods (14) on one side of the discharge port (13). The two limiting rods (14) are spaced apart. The screen plate (21) is provided with slots (211) that are adapted to the two limiting rods (14). When the screen plate (21) is placed on the top surface of the retaining ring (11), the two limiting rods (14) are respectively inserted into the two slots (211).
3. The screen for a screening machine of claim 2, wherein, The guide bar (3) includes a C-shaped section (31) and an arc-shaped section (32). The open end of the C-shaped section (31) faces the central axis of the screen plate (21). One end of the arc-shaped section (32) is fixedly connected to the end of the C-shaped section (31) near the discharge port (13). The other end of the arc-shaped section (32) extends between the two limiting rods (14).
4. The screen for a screening machine according to claim 3, characterized in that, The guide strip (3) is fixedly connected to the sieve plate (21) by a plurality of connectors (33), and the plurality of connectors (33) are evenly arranged along the extension direction of the guide strip (3).
5. The screen for a screening machine of claim 4, wherein, Each of the connectors (33) includes a U-shaped plate (331) and a horizontal plate (332) fixed to one side of the bottom of the U-shaped plate (331). The U-shaped plate (331) covers the outside of the guide strip (3), and the horizontal plate (332) is fixedly connected to the screen plate (21) by bolts (333).
6. The screen for a screening machine of claim 1, wherein, An annular rubber strip (4) is fixed to the outer edge of the top surface of the sieve plate (21), and the outer side of the annular rubber strip (4) abuts against the inner wall of the sieve box (1).
7. The screen for a screening machine according to claim 6, characterized in that, The cross-section of the annular rubber strip (4) is a right triangle, and the two right-angled sides of the right triangle abut against the inner wall of the sieve box (1) and the sieve plate (21) respectively.