A vibrating screen mesh structure with adjustable aperture

Abstract

This utility model relates to an adjustable aperture vibrating screen structure for use in the field of vibrating screens. It includes a support frame, with multiple transverse support plates fixedly connected to the inner cavity of the support frame. Sliding holes are drilled on the surface of each transverse support plate. Multiple longitudinal support plates are fixedly connected to each other. Two adjusting plates are provided between adjacent longitudinal support plates. The adjusting plates sequentially move through the multiple sliding holes. Movable plates are fixedly connected to both the front and rear ends of each adjusting plate. Adjustment holes are drilled at both the front and rear ends of the support frame, and protective strips are fixedly connected to both the front and rear ends of the support frame. This utility model sets two movable adjusting plates between the fixed longitudinal support plates. The screen aperture is adjusted by adjusting the position of the adjusting plates. Compared with existing double-layer screen plate structures, this design effectively reduces the formation of steps inside the screen holes, thereby significantly reducing the risk of screen clogging.

Description

Technical Field

[0001] This utility model relates to a screen structure, and more particularly to a vibrating screen structure with adjustable aperture for use in the field of vibrating screens. Background Technology

[0002] Vibrating screens operate by utilizing the reciprocating rotary vibration generated by the vibrator. The upper rotating weight of the vibrator causes the screen surface to produce planar rotary vibration, while the lower rotating weight causes the screen surface to produce conical rotary vibration. The combined effect of these two forces causes the screen surface to produce complex rotary vibration.

[0003] To improve the applicability of screens, existing technicians often use double-layer screen plates, with the upper and lower screen plates staggered to adjust the overall screen aperture size. For example, Chinese Patent Publication No. CN217550436U discloses a screen with adjustable aperture. This utility model adjusts the position of the lower screen plate in the slot and adjusts the guide diameter between the second screen opening and the first screen opening, so that the entire screen has an adjustable aperture function. By using a cam to push the height of the L-shaped support, the height of the mounting frame, the upper screen plate, and the lower screen plate is adjusted, so that the screen structure has vibration performance.

[0004] In practical applications, this double-layer sieve plate structure has inherent defects: the upper and lower sieve plates are both independent flat plates with a certain thickness. When the position of the lower sieve plate is adjusted to change the sieve aperture, the upper sieve plate remains fixed. At this time, a Z-shaped channel will be formed in the overlapping area of ​​the upper and lower sieve openings. There are internal steps at the corners. Since the size of the upper sieve opening remains unchanged, the particle size of the material that can enter the upper sieve opening may be larger than the effective screening aperture formed after the current upper and lower sieve openings are misaligned. After this part of the material falls into the channel, it is easily blocked by the internal steps and cannot pass through the lower sieve opening smoothly. As a result, it is more likely to be stuck inside the sieve holes, causing the screen to become clogged. Utility Model Content

[0005] The technical problem that this utility model aims to solve in view of the above-mentioned prior art is that the existing double-layer sieve plate structure may form steps inside the holes when adjusting the aperture, which makes the sieve more prone to clogging.

[0006] To solve the above problems, this utility model provides a vibrating screen mesh structure with adjustable aperture, including a support frame. Multiple transverse support plates are fixedly connected to the inner cavity of the support frame. Sliding holes are drilled on the surface of each transverse support plate. Multiple longitudinal support plates are fixedly connected to each other. Two adjusting plates are provided between two adjacent longitudinal support plates. The adjusting plates sequentially pass through multiple sliding holes. Moving plates are fixedly connected to both ends of the adjusting plates. Adjustment holes are drilled at both ends of the support frame, and protective strips are fixedly connected to both ends of the support frame. The ends of two longitudinally opposite moving plates, located away from each other, each pass through an adjustment hole and are positioned within the protective strip. A screw is provided at the right end of the protective strip. The left end of the screw sequentially threads through multiple moving plates and the protective strip. A protective shell is fixedly connected to the left ends of two protective strips. The left end of the screw is located within the protective shell, and a pulley assembly is fitted around both screws. A knob is fixedly connected to the right end of one of the protective strips. The left end of the knob movably passes through the protective strip and is fixedly connected to the screw.

[0007] In the above-mentioned adjustable aperture vibrating screen structure, two movable adjustment plates are set between fixed longitudinal support plates. The screen aperture is adjusted by adjusting the position of the adjustment plates. Compared with the existing double-layer screen plate structure, this design can effectively reduce the formation of steps inside the screen holes, thereby significantly reducing the risk of screen blockage.

[0008] As a further supplement to this application, telescopic rods are fixedly connected between two adjacent moving plates and between the moving plates and the inner wall of the adjustment hole, with the upper and lower ends of the telescopic rods slidably connected to the upper and lower inner walls of the adjustment hole, respectively.

[0009] As a further supplement to this application, the upper end of the adjustment plate is chiseled with multiple grooves, and the ends of the two adjustment plates that are far apart are respectively attached to the adjacent longitudinal support plates. The upper ends of the transverse support plate, the longitudinal support plate and the adjustment plate are all flush with the upper end of the support frame.

[0010] As a further supplement to this application, the outer surface of the screw is provided with multiple threaded sections, each threaded section including two sections of threads with opposite directions of rotation.

[0011] As a further supplement to this application, positioning plates are fixedly connected to both the front and rear ends of the support frame, and anti-collision blocks are provided between the two positioning plates. The longitudinal section of the anti-collision blocks is triangular, and the left ends of both the positioning plates and the anti-collision blocks are flush with the left end of the protective shell.

[0012] As a further supplement to this application, the anti-collision block includes a bottom block located at the upper end of the support frame, a positioning plate and the bottom block are fixedly connected by bolts, a buffer plate is fixedly connected to the upper end of the bottom block, and an impact plate is fixedly connected to the upper end of the buffer plate. The bottom block and the impact plate are both made of rigid material, and the buffer plate is made of elastic material.

[0013] In summary, in practical applications, rotating the knob causes the screw to rotate, and then the pulley set rotates the two screws. The special positive and negative threads on the screws push the adjusting plate and the moving plate to move synchronously in opposite directions along the guide of the adjusting hole, thereby adjusting the overall screen aperture size. Compared with the existing double-layer screen plate adjustment method, this method can effectively reduce the formation of steps inside the screen holes, thus significantly reducing the risk of screen clogging. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the first embodiment of this application;

[0015] Figure 2 This is a top view of the structure according to the first embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the support frame structure according to the first embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the transverse support plate and the longitudinal support plate structure of the first embodiment of this application;

[0018] Figure 5 This is a schematic diagram of the internal structure of the support frame according to the first embodiment of this application;

[0019] Figure 6 This is a schematic diagram of the adjustment plate structure according to the first embodiment of this application;

[0020] Figure 7 This is a schematic diagram of the telescopic rod structure according to the first embodiment of this application;

[0021] Figure 8 This is a schematic diagram of the screw structure according to the first embodiment of this application;

[0022] Figure 9 This is a front view of the anti-collision block structure according to the second embodiment of this application;

[0023] Figure 10 This is a left view of the anti-collision block structure according to the second embodiment of this application.

[0024] Explanation of the labels in the diagram:

[0025] 1-Support frame, 2-Transverse support plate, 3-Sliding hole, 4-Longitudinal support plate, 5-Adjusting plate, 6-Moving plate, 7-Adjusting hole, 8-Protective strip, 9-Screw, 10-Protective shell, 11-Pulley assembly, 12-Knob, 13-Telescopic rod, 14-Positioning plate, 15-Anti-collision block, 151-Bottom block, 152-Buffer plate, 153-Impact plate. Detailed Implementation

[0026] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0027] First implementation method:

[0028] Figures 1-4 The diagram shows an adjustable aperture vibrating screen structure, including a support frame 1. Multiple transverse support plates 2 are fixedly connected to the inner cavity of the support frame 1. Sliding holes 3 are drilled on the surface of the transverse support plates 2. Multiple longitudinal support plates 4 are fixedly connected to the multiple transverse support plates 2. The fixed grid formed by the support frame 1, the transverse support plates 2 and the longitudinal support plates 4 is the initial screen.

[0029] Figures 1-6 The diagram shows that two adjusting plates 5 are provided between two adjacent longitudinal support plates 4. The upper end of the adjusting plate 5 is chiseled with multiple grooves. In the initial state, the ends of the two adjusting plates 5 that are far apart are respectively attached to the adjacent longitudinal support plates 4. The upper ends of the transverse support plate 2, the longitudinal support plate 4, and the adjusting plate 5 are all flush with the upper end of the support frame 1. When the adjusting plate 5 moves, its upper end is flush with the upper end of the support frame 1, so that it is not easy to generate internal steps in the mesh, making the screen surface a flat, continuous, and non-protruding overall working plane. The adjusting plate 5 moves through multiple sliding holes 3 in sequence. The sliding holes 3 facilitate the movement of the adjusting plate 5. The front and rear ends of the adjusting plate 5 are fixedly connected with moving plates 6. The front and rear ends of the support frame 1 are chiseled with adjusting holes 7, and the front and rear ends of the support frame 1 are fixedly connected with protective strips 8. The ends of the two longitudinally opposite moving plates 6 that are far apart move through an adjusting hole 7 and are located inside the protective strip 8.

[0030] Figure 5 and Figure 7 The diagram shows that telescopic rods 13 are fixedly connected between two adjacent moving plates 6 and between the moving plate 6 and the inner wall of the adjusting hole 7. The telescopic rods 13 are round or square. In the prior art, round telescopic rods are more common. If a square telescopic rod is used, its structural principle is the same as that of the existing round telescopic rod. The preferred choice in this application is a square telescopic rod, which allows the upper and lower ends of the telescopic rod 13 to slide and connect with the upper and lower inner walls of the adjusting hole 7, respectively. This effectively fills the gap generated when the moving plate 6 moves, reduces the possibility of fine particles entering the protective strip 8 during screening, and protects the screw 9. To prevent dust wear and jamming of the pulley assembly 11, in the initial state (i.e., the ends of the two adjusting plates 5 that are far apart are respectively in contact with the adjacent longitudinal support plates 4), the telescopic rod 13 between the two adjusting plates 5 is at its longest, the distance between the two adjusting plates 5 is also the largest, and the screen aperture is also the largest. When the longitudinal support plates 4 and the adjusting plates 5 begin to move away from each other until the telescopic rod 13 is compressed to its minimum length, the distance between the two adjusting plates 5 located between a pair of longitudinal support plates 4 is still greater than the distance between any adjusting plate 5 and the adjacent longitudinal support plate 4.

[0031] Figures 5-8 The diagram shows that: A screw 9 is provided at the right end of the protective strip 8. The outer surface of the screw 9 has multiple threaded sections, each including two sections of threads with opposite directions. The left end of the screw 9 is threaded through multiple moving plates 6 and the protective strip 8. A receiving groove is carved at the end of the protective strip 8 near the support frame 1. Both the moving plates 6 and the screw 9 are located inside the receiving groove, which facilitates the movement of the moving plates 6 and the rotation of the screw 9. A protective shell 10 is fixedly connected to the left ends of the two protective strips 8. The left end of the screw 9 is located inside the protective shell 10, and a pulley assembly 11 is fitted around both screws 9. The protective shell 10 is located near the support frame 1. One end is chiseled with a receiving groove 2. The left ends of the pulley assembly 11 and the screw 9 are both located in the receiving groove 2 to facilitate the rotation of the screw 9 and the transmission of the belt in the pulley assembly 11. A knob 12 is fixedly connected to the right end of one of the protective strips 8. The left end of the knob 12 moves through the protective strip 8 and is fixedly connected to the screw 9. Two movable plates 6 located between two adjacent longitudinal support plates 4 are fitted on a threaded section. The two sections of threads with opposite directions on the threaded section can drive the two movable plates 6 to move in opposite directions, thereby changing the distance between the adjusting plate 5 and the longitudinal support plate 4, thereby adjusting the aperture of the overall screen.

[0032] During use, the operator first determines whether the screen aperture needs adjustment based on the screening process requirements. If the aperture needs to be adjusted to size A, it can be done by rotating the knob 12 located on the protective strip 8 on the side of the screen. The rotation of the knob 12 will drive the connected screw 9 to rotate, which in turn will drive the other screw 9 to rotate synchronously through the transmission of the pulley group 11. During the rotation, it will convert the rotational motion into linear motion by engaging with the thread of the moving plate 6, driving all the moving plates 6 to move smoothly along the guide of the adjustment hole 7. Since the threaded section contains two sections of thread with opposite directions, the two adjacent moving plates 6 will move in opposite directions and move closer to each other. The moving plate 6 will drive the adjustment plate 5 to move, causing the longitudinal support plate 4 and the adjustment plate 5 that are in contact with each other to start to move away. That is, the pair of adjustment plates 5 located between a pair of longitudinal support plates 4 will move closer to each other. During this process, the pair of moving plates 6 that are moving closer to each other will move closer to each other. The telescopic rod 13 retracts accordingly, and the moving plate 6 and the adjusting plate 5 are rigidly connected. Therefore, the movement of the moving plate 6 drives all the adjusting plates 5 to slide synchronously within the fixed grid formed by the transverse support plate 2 and the longitudinal support plate 4, thereby changing the gap between the two adjusting plates 5. When the distance between a pair of adjusting plates 5 that are close to each other is adjusted to the target value A (and A is always greater than the distance between the adjusting plate 5 and the longitudinal support plate 4), the aperture setting is completed. At this time, particles smaller than A in the material being screened can fall through the gap (and the size of the material falling through the gap between the adjusting plate 5 and the longitudinal support plate 4 must also be smaller than A), thereby achieving effective classification. This application not only changes the width of all the screen gaps on the entire screen surface and adjusts the aperture, but also does not easily cause the problem of internal steps in the screen, significantly reducing the situation of screen clogging and improving the adaptability of the equipment to different materials and the ease of operation.

[0033] Second implementation method:

[0034] This embodiment adds a positioning plate 14 and a collision avoidance block 15 to the first embodiment, while the rest remains the same as the first embodiment.

[0035] Figure 9 and Figure 10As shown: Positioning plates 14 are fixedly connected to both the front and rear ends of the support frame 1. A crash block 15 is provided between the two positioning plates 14. The longitudinal section of the crash block 15 is triangular. The left ends of both the positioning plates 14 and the crash block 15 are flush with the left end of the protective shell 10. The crash block 15 includes a bottom block 151 located at the upper end of the support frame 1. The positioning plates 14 and the bottom block 151 are fixedly connected by bolts. A buffer plate 152 is fixedly connected to the upper end of the bottom block 151. An impact plate 153 is fixedly connected to the upper end of the buffer plate 152. Both the bottom block 151 and the impact plate 153 are made of rigid materials, while the buffer plate 152 is made of elastic materials. The buffer plate 152 can be made of polyurethane, rubber, or other materials. When the crash block 15 is impacted, the buffer plate 152 deforms, absorbing and dispersing most of the impact energy. Once the crash block 15 is damaged, it can be quickly replaced without repairing the main frame, thus reducing maintenance costs.

[0036] The bottom block 151 is firmly connected to the positioning plate 14 with bolts, so that the anti-collision block 15 is connected to the two positioning plates 14. When using the screen, the material first falls on the anti-collision block 15 and then slides onto the grid structure composed of the transverse support plate 2 and the longitudinal support plate 4, thereby protecting the screen and preventing the material from falling directly onto the screen. If the anti-collision block 15 is damaged after long-term use, it can be replaced at any time, thereby extending the service life of the screen.

[0037] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A screen deck structure for a vibratory screen having an adjustable aperture, comprising a support frame (1), characterised in that: The inner cavity of the support frame (1) is fixedly connected to multiple transverse support plates (2). Sliding holes (3) are drilled on the surface of each transverse support plate (2). Multiple longitudinal support plates (4) are fixedly connected to each of the transverse support plates (2). Two adjusting plates (5) are provided between two adjacent longitudinal support plates (4). The adjusting plates (5) sequentially move through multiple sliding holes (3). Moving plates (6) are fixedly connected to both the front and rear ends of each adjusting plate (5). Adjusting holes (7) are drilled at both the front and rear ends of the support frame (1), and protective strips (8) are fixedly connected to both the front and rear ends of the support frame (1). Two longitudinally opposite... The ends of the moving plates (6) that are far apart from each other are respectively movably passed through an adjustment hole (7) and located inside the protective strip (8). The right end of the protective strip (8) is provided with a screw (9). The left end of the screw (9) is threaded through multiple moving plates (6) and the protective strip (8) in sequence. The left ends of the two protective strips (8) are fixedly connected to a protective shell (10). The left end of the screw (9) is located inside the protective shell (10), and the two screws (9) are jointly fitted with a pulley group (11). The right end of one of the protective strips (8) is fixedly connected to a knob (12). The left end of the knob (12) movably passes through the protective strip (8) and is fixedly connected to the screw (9).

2. The adjustable aperture vibrating screen mesh structure according to claim 1, characterized in that: Telescopic rods (13) are fixedly connected between two adjacent moving plates (6) and between the moving plate (6) and the inner wall of the adjusting hole (7). The upper and lower ends of the telescopic rods (13) are slidably connected to the upper and lower inner walls of the adjusting hole (7), respectively.

3. A variable aperture screen mesh structure according to claim 1, wherein: The upper end of the adjustment plate (5) is chiseled with multiple grooves. The ends of the two adjustment plates (5) that are far apart are respectively attached to the adjacent longitudinal support plate (4). The upper ends of the transverse support plate (2), the longitudinal support plate (4) and the adjustment plate (5) are all level with the upper end of the support frame (1).

4. A variable aperture screen mesh structure according to claim 1, wherein: The outer surface of the screw (9) is provided with multiple threaded sections, each of which includes two sections of threads with opposite directions of rotation.

5. A variable aperture screen mesh structure according to claim 1, wherein: The front and rear ends of the support frame (1) are fixedly connected with positioning plates (14), and anti-collision blocks (15) are provided between the two positioning plates (14). The longitudinal section of the anti-collision block (15) is triangular, and the left ends of the positioning plates (14) and the anti-collision blocks (15) are flush with the left end of the protective shell (10).

6. A variable aperture screen mesh structure according to claim 5, wherein: The anti-collision block (15) includes a bottom block (151) located at the upper end of the support frame (1). The positioning plate (14) is fixedly connected to the bottom block (151) by bolts. A buffer plate (152) is fixedly connected to the upper end of the bottom block (151). An impact plate (153) is fixedly connected to the upper end of the buffer plate (152). The bottom block (151) and the impact plate (153) are both made of hard material, and the buffer plate (152) is made of elastic material.

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