Ore vibrating screen

Abstract

The utility model relates to the technical field of mining mechanical equipment, and discloses an ore vibrating screen which comprises a movable screen mesh, the screen mesh comprises a main screen and an auxiliary screen, the main screen is horizontally installed and can move up and down in a reciprocating mode, the auxiliary screen is arranged on the periphery of the upper portion of the main screen, the auxiliary screen is all arranged in an inclined mode, and the screen mesh is arranged on the main screen. The bottom ends of the auxiliary sieves are close to each other and located on the inner side of the main sieve, and all the auxiliary sieves can synchronously rotate above the main sieve, so that ores on the auxiliary sieves jump up from the surfaces of the auxiliary sieves and are mixed with vertically-jumping ores on the main sieve. According to the mine vibrating screen, the two kinds of screen cloth are matched, the main screen reciprocates up and down, then all the auxiliary screens on the periphery above the main screen swing, screening can be conducted more efficiently, and the screening effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery and equipment, and in particular to an ore vibrating screen. Background Technology

[0002] A vibrating screen for ore is a specialized device for screening ores. It utilizes advanced technologies from both domestic and international sources, including a vibrating motor to generate vibration, rubber springs for damping, a highly wear-resistant screen plate, and a sealed screen box, along with an advanced self-synchronizing vibration principle. It features long service life, low noise, and high screening efficiency, making it suitable for screening sintered ores and natural ores. Existing vibrating screens rely on the reverse rotation of the vibrating motor to cause the entire screen, supported by dampers, to vibrate linearly. Material falls into the screen box from the feed end, moves rapidly forward, loosens, and passes through the screen, completing the screening operation. Common ore vibrating screens are very similar to general-purpose vibrating screens, with the main difference being the particle size to be screened. The basic principle of vibrating screening relies on the screen mesh vibrating horizontally or vertically. However, when the ore layer is thick or the ore feed is too fast, the ore on the screen may not move quickly enough to reach the bottom of the screen and fall through the screen holes, resulting in low screening efficiency and poor screening effect. Utility Model Content

[0003] The purpose of this utility model is to provide an ore vibrating screen to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A vibrating screen for ore includes a movable screen mesh, comprising a main screen and an auxiliary screen. The main screen is horizontally installed and can move up and down reciprocally. The auxiliary screens are arranged around the main screen above it. All the auxiliary screens are inclined and their bottom ends are close to each other and located inside the main screen. All the auxiliary screens can rotate synchronously above the main screen, causing the ore on the auxiliary screens to jump off their surfaces and mix with the ore that jumps vertically on the main screen.

[0006] When the main screen moves vertically upward, the tops of all the secondary screens rotate at a certain angle toward the center above the main screen; the main screen is a conical cover structure with a central bulge.

[0007] The auxiliary screen is fixed to the end of a drive rod on the side facing away from the main screen. The drive rod is hinged to the frame. One end of a return spring is also installed on the frame. The other end of the return spring is connected to one end of the drive rod. The other end of the drive rod is connected to the main screen through a sliding rod that is elastically telescopically installed.

[0008] The slide bar is axially slidably mounted on the frame and connected to the frame by a pressure spring. Steel balls are fixed at both ends of the slide bar.

[0009] Several touch plates are also provided on the edge of the main screen. The touch plates are in smooth contact with the steel ball at one end of the slide rod. When the touch plates move vertically upward with the main screen, the drive rod is rotated by the steel ball and the slide rod.

[0010] All the touch plates are arranged in a conical shell, with the larger end of the shell facing down and the smaller end fixed to the edge of the main screen.

[0011] The edge of the main screen is also fixed with a material receiving trough. The material receiving trough has a conical shell structure and is coaxial with the conical shell. The large end of the material receiving trough faces upward, and the bottom ends of all the secondary screens are located inside the material receiving trough.

[0012] All the auxiliary screens are arranged in a circular array above the receiving trough, forming a conical structure. Alternatively, all the auxiliary screens are arranged in a circular array above the receiving trough, and the auxiliary screens are in the shape of isosceles trapezoids. In the unfolded surface of the conical structure, the shorter base of two adjacent auxiliary screens is not on the same straight line, forming a regular polygonal pyramidal shell structure.

[0013] A vertically reciprocating drive shaft is fixed at the center of the bottom end face of the main screen. The drive shaft is vertically and slidably installed in a bin, which is used to catch the ore spilled from all the screens.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] Unlike traditional methods that use vibrating motors to generate a single motion, this invention features a simple and ingenious structure. The two types of screens work together, with the ore lifted by the main screen scattering onto the surrounding secondary screens for sieving. Simultaneously, due to the oscillation of the secondary screens, the ore on their surface leaps back towards the center above the main screen, and some ore rolls down the secondary screens and then falls back onto the main screen, creating a cyclical sieving process. This achieves a more three-dimensional movement of the ore, resulting in high screening efficiency and better sieving effect. Attached Figure Description

[0016] Figure 1 This is a simplified structural diagram of the present invention;

[0017] Figure 2 This is a diagram of the swing drive structure of the auxiliary screen in this utility model;

[0018] Figure 3 This is a simplified structural diagram of the present invention;

[0019] Figure 4This is a schematic diagram showing the unfolded state of all the secondary sieves that form a conical structure.

[0020] The following are the labels in the diagram: 1. Drive shaft; 2. Main screen; 3. Auxiliary screen; 4. Frame; 5. Return spring; 6. Drive rod; 601 (section 1); 602 (section 2); 7. Slide rod; 8. Pressure spring; 9. Steel ball; 10. Touch plate; 11. Receiving trough; 12. Bucket. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] like Figure 1-4 As shown, this utility model provides an ore vibrating screen, mainly comprising a movable screen, which is a conventional screen. When ore is on its surface, ore of a set particle size will pass through, thus achieving screening. The key feature is that the screen includes a main screen 2 and an auxiliary screen 3. The main screen 2 is horizontally installed and, for example, has a circular structure that can move up and down reciprocally. This high-frequency vertical reciprocating movement, achieved through hydraulic, pneumatic, or electric means, causes the main screen 2 to frequently oscillate up and down, causing the surface ore to bounce upwards, thus scattering it to some extent in all directions. Simultaneously, the auxiliary screen 3 is positioned above and around the main screen 2. The auxiliary screen 3 is all inclined to catch some of the ore that bounces off the main screen 2, allowing it to roll down onto the auxiliary screen 3 for separation. The bottom ends of the auxiliary screens 3 are close together and located inside the main screen 2, ensuring that when the ore falls back down, it rolls back into the main screen 2 for cyclic screening. Specifically, all the auxiliary screens 3 can rotate synchronously above the main screen 2, so that the ore that rises due to the upward movement of the main screen 2, after falling onto the auxiliary screen 3, will jump off its surface again due to the vibration of the auxiliary screen 3. On the one hand, this achieves one screening, and on the other hand, it can be mixed again with the other ore that jumps vertically on the main screen 2, and fall onto the main screen 2 to wait for the next screening when the main screen 2 moves upward.

[0024] As one of the specific implementation structures, such as Figure 1As the main screen 2 moves vertically upward, the tops of all the auxiliary screens 3 rotate at a certain angle towards the center above the main screen 2, such as... Figure 1 In the middle, the leftmost secondary sieve 3 rotates clockwise, and the leftmost secondary sieve 3 rotates counterclockwise, correspondingly, as... Figure 3 The main screen 2 has a centrally raised conical cover structure, which allows the ore that is lifted up to be better scattered in all directions when the main screen 2 moves upward, and then falls on the corresponding secondary screen 3 for further screening.

[0025] As for the linkage structure between the auxiliary screen 3 and the main screen 2, it can be as follows: Figure 1 and Figure 2 As shown, the auxiliary screen 3 is fixed to the end of a drive rod 6 on the side facing away from the main screen 2. The drive rod 6 is hinged to the frame 4. One end of a return spring 5 is also installed on the frame 4. The other end of the return spring 5 is connected to a section 601 of the drive rod 6. The other section 602 of the drive rod 6 is connected to the main screen 2 via a sliding rod 7 that is elastically telescopically mounted. Ideally, the contact should be smooth and abutting. When the main screen 2 moves down and retracts to reset, the elastic telescopic mounting of the sliding rod 7, combined with the aforementioned return spring 5, allows the auxiliary screen 3 to quickly reset, generating multiple elastic vibrations during this period, which is beneficial for screening. Specifically, in this embodiment, the sliding rod 7 is axially slidably mounted on the frame 4 and connected to the frame 4 via a pressure spring 8. Steel balls 9 are fixed at both ends of the sliding rod 7 to ensure smooth contact.

[0026] In order to synchronously drive drive lever 6, such as Figure 1 and Figure 2 As shown, several actuating plates 10 are also provided on the edge of the main screen 2. These actuating plates 10 are also arranged in a circular array. The actuating plates 10 are in smooth contact with the steel ball 9 at one end of the slide rod 7, so that when the actuating plates 10 move vertically upward with the main screen 2, the steel ball 9 and the slide rod 7 pry the drive rod 6 to rotate, which in turn causes the auxiliary screen 3 to swing. In practice, all the actuating plates 10 can be arranged into a conical shell, that is, these actuating plates 10 are integrally formed, with the large end of the conical shell facing down and the small end fixed to the edge of the main screen 2. All drive rods 6 are driven synchronously by the drive shaft 1.

[0027] Furthermore, in this embodiment, as Figure 1 As shown, a receiving trough 11 is also fixed on the edge of the main screen 2. The receiving trough 11 can specifically include a conical shell structure and be coaxial with the conical shell. The bottom end of this conical shell structure can have a cylindrical tube (not marked in the figure). The cylindrical tube is used for vertical sliding of the main screen 2. The large end of the receiving trough 11 faces upward, and the bottom ends of all the auxiliary screens 3 are located inside the receiving trough 11, so that the vibrating ore falls into the receiving trough 11.

[0028] Among them, such as Figure 1All auxiliary screens 3 are arranged in a ring array above the receiving trough 11, forming a conical structure; or, all auxiliary screens 3 are arranged in a ring array above the receiving trough 11, and as... Figure 4 As shown, the secondary sieve 3 has an isosceles trapezoidal structure. In the unfolded surface of the conical structure it forms, the shorter base of two adjacent secondary sieves 3 are not on the same straight line, thus forming a regular polygonal pyramidal shell structure.

[0029] To prevent the ore from scattering outside this vibrating screen, such as Figure 3 As shown, a vertically reciprocating drive shaft 1 is fixed at the center of the bottom end face of the main screen 2. The drive shaft 1 is vertically slidably installed in a bin 12. The bin 12 is used to catch the ore that falls from all the screens, that is, when the depth of the receiving trough 11 is not enough, it catches a small portion of the ore that flies out of the receiving trough 11.

Claims

1. A vibrating screen for ore, comprising a movable screen mesh, characterized in that: The screen includes a main screen (2) and a secondary screen (3). The main screen (2) is installed horizontally and can move up and down. The secondary screen (3) is arranged around the main screen (2) above it. All the secondary screens (3) are inclined and their bottom ends are close to each other and located inside the main screen (2). All the secondary screens (3) can rotate synchronously above the main screen (2), so that the ore on the secondary screen (3) jumps off its surface and mixes with the ore that jumps vertically on the main screen (2).

2. The ore vibrating screen according to claim 1, characterized in that: When the main screen (2) moves vertically upward, the tops of all the secondary screens (3) rotate at a certain angle toward the center above the main screen (2); the main screen (2) is a cone-shaped cover structure with a central bulge.

3. The ore vibrating screen according to claim 2, characterized in that: The auxiliary screen (3) is fixed to the end of a drive rod (6) on the side facing away from the main screen (2). The drive rod (6) is hinged on the frame (4). The frame (4) is connected to one end of a return spring (5). The other end of the return spring (5) is connected to one section (601) of the drive rod (6). The other section (602) of the drive rod (6) is connected to the main screen (2) through a sliding rod (7) that is installed in an elastic telescopic manner.

4. The ore vibrating screen according to claim 3, characterized in that: The slide bar (7) is axially slidably mounted on the frame (4) and connected to the frame (4) by a pressure spring (8). Steel balls (9) are fixed at both ends of the slide bar (7).

5. The ore vibrating screen according to claim 4, characterized in that: Several touch plates (10) are also provided on the edge of the main screen (2). The touch plates (10) are in smooth contact with the steel ball (9) at one end of the slide bar (7). When the touch plates (10) move vertically upward with the main screen (2), the drive rod (6) is rotated by the steel ball (9) and the slide bar (7).

6. The ore vibrating screen according to claim 5, characterized in that: All the touch plates (10) form a conical shell with the large end facing down and the small end fixed to the edge of the main screen (2).

7. The ore vibrating screen according to claim 6, characterized in that: The edge of the main screen (2) is also fixed with a receiving groove (11). The receiving groove (11) includes a conical shell structure and is coaxial with the conical shell. The large end of the receiving groove (11) faces upward, and the bottom ends of all the secondary screens (3) are located inside the receiving groove (11).

8. The ore vibrating screen according to claim 7, characterized in that: All the auxiliary screens (3) are arranged in a ring array above the receiving trough (11) and form a conical structure.

9. The ore vibrating screen according to claim 7, characterized in that: All the secondary screens (3) are arranged in a ring array above the receiving trough (11), and the secondary screens (3) are in the shape of an isosceles trapezoid. In the unfolded surface of the conical structure formed by them, the shorter base of two adjacent secondary screens (3) is not on the same straight line, so as to form a regular polygonal pyramidal shell structure.

10. An ore vibrating screen according to any one of claims 1-9, characterized in that: The main screen (2) has a vertically reciprocating drive shaft (1) fixed at the center of its bottom end face. The drive shaft (1) is vertically slidably installed in a bin (12) for catching the ore spilled from all the screens.

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