A multi-stage vibrating screen that is easy to disassemble

Abstract

This invention relates to the field of vibrating screen technology, and provides a multi-stage vibrating screen that is easy to disassemble. It includes a base frame; a vibrating frame is vibratingly mounted on the base frame, and several screen plates are slidably connected to the vibrating frame. These screen plates are arranged sequentially along the material conveying direction, with a height difference between adjacent screen plates. After sliding, the screen plates are configured to detach from the vibrating frame. Several locking structures are provided on the side walls of the vibrating frame and are located one-to-one at the ends of the screen plates, used to lock the screen plates. The width of the screen plates is configured to increase sequentially along the material conveying direction, allowing the screen plates to avoid the locking structures. Through this technical solution, this arrangement utilizes a staggered form with different heights and widths to balance multi-stage separation and quick-release sliding functions. When screen plates need to be replaced, simply remove the locking structure at the end of the corresponding screen plate and slide it out; the same applies to installing new screen plates.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of vibrating screen technology, and more specifically, to a multi-stage vibrating screen that is easy to disassemble. Background Technology

[0002] In the complex and critical operational system of offshore drilling platforms, various equipment work together to provide strong support for the exploration and exploitation of deep-sea oil and gas resources. Among them, separation equipment such as vibrating screens are an indispensable core part of the entire system. They separate and recover exploration materials (rock cuttings, mud, and various associated minerals) generated during offshore drilling operations. This process plays a crucial foundational role in the subsequent in-depth research, accurate analysis, and efficient collection and utilization of target materials.

[0003] Vibrating screens mainly utilize the vibration of the screen plate to screen materials. They can be divided into single-stage separation or multi-stage separation. Regardless of the type, the screen plate is a consumable part that needs to be replaced frequently. It also needs to be replaced when adjusting the screening accuracy. Currently, sliding screen plates are commonly used to achieve quick replacement. Under normal screening conditions, the screen plate needs to be fixed by bolts at the end. When replacement is needed, the bolts are removed and the screen plate is slid to complete the disassembly. Then, a new screen plate is slid in and locked.

[0004] However, the above structure still has the following drawbacks: integrated screen plates are usually heavy and large in size, making replacement inconvenient, and when local wear occurs, the entire plate must be replaced. Although some inventors have adopted a multi-stage separation method with the screen plate, that is, by increasing the number of screen plates, directly splitting the integrated screen plate into several sliding screen plates of different specifications to meet the multi-stage separation, the sliding of each screen plate will affect each other, and it is easily blocked by the structure that fixes the screen plate with bolts at the ends. Summary of the Invention

[0005] To overcome the above-mentioned defects, embodiments of the present invention provide a multi-stage vibrating screen that is easy to disassemble, solving the technical problem in the related art that the screen plate in the vibrating screen cannot simultaneously achieve multi-stage separation and sliding quick-disassembly functions.

[0006] According to one aspect, at least one embodiment of the present invention provides a multi-stage vibrating screen that is easy to disassemble, comprising:

[0007] Base frame;

[0008] The vibrating frame is mounted on a base frame. Several screen plates are slidably connected to the vibrating frame. The screen plates are arranged sequentially along the material conveying direction, and there is a height difference between two adjacent screen plates. After the screen plates slide, they are configured to detach from the vibrating frame.

[0009] Several locking structures are provided on the side wall of the vibrating frame and are located one by one at the ends of several screen plates. The locking structures are used to lock the screen plates.

[0010] Among them, the width of several screen plates is configured to increase sequentially along the material conveying direction so that the screen plates can avoid the locking structure;

[0011] The locking structure includes:

[0012] The limiting inclined plate is fixed on the inner wall of the vibrating frame and located above the screen plate. A locking gap is formed between the limiting inclined plate and the end of the screen plate. The length direction of the limiting inclined plate intersects the length direction of the screen plate.

[0013] The extrusion block is slidably disposed on the inner side wall of the vibrating frame and located within the locking interval. After the extrusion block slides, it is configured to closely adhere to the limiting inclined plate and the end of the screen plate to press the screen plate.

[0014] For example, at least one embodiment of the present invention provides a multi-stage vibrating screen that is easy to disassemble, wherein the top of the extrusion block has teeth, and the locking structure further includes:

[0015] The gear is mounted on the inner wall of the vibrating frame and located on one side of the limiting inclined plate. The gear meshes with the teeth and is configured to drive the extrusion block to slide after it rotates.

[0016] For example, at least one embodiment of the present invention provides a multi-stage vibrating screen that is easy to disassemble, wherein a primary screen frame is fixedly provided on the top of the vibrating frame, a screen plate is slidably connected on the primary screen frame, and the thickness of the primary screen frame gradually decreases from the middle to the edge.

[0017] For example, at least one embodiment of the present invention provides a multi-stage vibrating screen that is easy to disassemble, wherein the screen plate is slidably connected to the vibrating frame along the horizontal direction, and the height of several screen plates is configured to decrease sequentially along the material conveying direction.

[0018] For example, at least one embodiment of the present invention provides a multi-stage vibrating screen that is easy to disassemble. The bottom of the vibrating frame has several positioning holes, and several screen plates are detachably connected to the several positioning holes one-to-one. The locking structure further includes:

[0019] The locking block is mounted on the inner wall of the vibrating frame and located above the end of the screen plate. The locking block is used to press the end of the screen plate. After the locking block rises, it is configured to drive the screen plate to be removed from the positioning hole and loosen the screen plate.

[0020] For example, at least one embodiment of the present invention provides a multi-stage vibrating screen that is easy to disassemble, wherein the bottom of the screen plate has a positioning post, the positioning post is detachably connected to the positioning hole, and the locking structure further includes:

[0021] The elastic element is located inside the positioning hole. One end of the elastic element acts on the screen plate, and the other end acts on the vibrating frame. The elastic element elastically pushes the screen plate to make the screen plate disengage from the positioning hole.

[0022] For example, at least one embodiment of the present invention provides a multi-stage vibrating screen that is easy to disassemble, which further includes:

[0023] Several springs are arranged in a matrix, with one end of each spring acting on the vibrating frame and the other end acting on the base frame. The springs elastically push the vibrating frame so that the vibrating frame vibrates relative to the base frame.

[0024] The vibration motor is detachably mounted on the top of the vibration frame and is used to drive the vibration frame and the screen plate to vibrate synchronously and elastically.

[0025] The beneficial effects of the embodiments of the present invention are as follows:

[0026] Multi-stage separation is achieved mainly through the vibration of several screen plates of various specifications arranged sequentially along the material conveying direction. That is, the integrated screen plate is directly split into parts, so that the material can be classified and screened according to characteristics such as particle size when passing through screen plates of different specifications in sequence. At the same time, it can also improve space utilization and eliminate the need to set up multiple screen plates.

[0027] Furthermore, to avoid mutual obstruction between several screen plates at the same height, and to prevent the bolts or other locking structures at the ends of the screen plates from blocking adjacent screen plates and preventing them from sliding out smoothly for maintenance, a height difference is set between two adjacent screen plates, and the width of the screen plates increases sequentially along the material conveying direction. This arrangement uses staggered forms of different heights and widths to take into account both multi-stage separation and sliding quick-release functions. When it is necessary to replace the screen plate, simply remove the locking structure at the end of the corresponding screen plate and slide it out directly. The same applies to installing a new screen plate. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the vibration frame in one embodiment of the present invention;

[0030] Figure 2 for Figure 1 The locking state diagram of the locking structure in the embodiment;

[0031] Figure 3for Figure 1 A schematic diagram of the locking structure in the embodiment;

[0032] Figure 4 for Figure 1 A top view of the vibration frame in the embodiment;

[0033] Figure 5 for Figure 1 A schematic diagram of the first arrangement of several screen plates in the embodiment;

[0034] Figure 6 This is a diagram showing the locking state of the locking structure in another embodiment of this disclosure;

[0035] Figure 7 for Figure 6 A schematic diagram of the locking structure in the embodiment;

[0036] Figure 8 for Figure 6 A schematic diagram of the positioning column in the embodiment;

[0037] Figure 9 for Figure 6 The diagram shows the assembly of the vibrating frame and the primary screening frame in the embodiment.

[0038] Figure 10 for Figure 1 The embodiment is a schematic diagram of a multi-stage vibrating screen that is easy to disassemble.

[0039] In the diagram: 1. Base frame, 2. Vibrating frame, 201. Positioning hole, 3. Screen plate, 302. Positioning column, 4. Locking structure, 401. Limiting inclined plate, 402. Locking interval, 403. Extrusion block, 404. Teeth, 405. Gear, 407. Locking block, 408. Elastic element, 5. Primary screening frame, 6. Spring, 7. Vibrating motor, 8. Mounting frame. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0041] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0042] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 the present invention.

[0045] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] like Figures 1-10 As shown, this invention illustrates a multi-stage vibrating screen that is easy to disassemble in one embodiment. The base frame 1 serves as the basic support for the vibrating frame 2 and locking structure 4, among other components. The vibrating frame 2 is vibrating on the base frame 1, and this vibration setting is the power source for the entire screening operation. A mounting frame 8 is horizontally placed at the top center of the frame-shaped vibrating frame 2, avoiding the position of the internal screen plates 3, and a vibrating motor 7 is installed by bolts to ensure that the vibrating motor 7 can stably drive the frame-shaped vibrating frame 2 as a whole and several screen plates 3 therein to vibrate.

[0047] Several screen plates 3 can slide horizontally or inclinedly at the bottom center of the frame-shaped vibrating frame 2 and are arranged sequentially along the material conveying direction to ensure that the material can be continuously subjected to the vibration of each screen plate 3. On this basis, in order to avoid the screen plates 3 at the same height from blocking each other, and to avoid the bolts and other locking structures 4 at the ends of the screen plates 3 from blocking adjacent screen plates 3 and preventing them from sliding out smoothly for maintenance, a height difference is set between each pair of adjacent screen plates 3. Specifically, along the material conveying direction, the height of each screen plate 3 becomes lower and the width becomes larger, so that the width of the front screen plate 3 can cover the width of the rear screen plate 3 (here, the front side refers to the material conveying direction) to take into account the multi-stage separation and sliding quick-release functions. Specifically, each screen plate 3 can be linearly slidably connected to the side wall of the frame-shaped vibrating frame 2 through a structure such as a guide rail. For example, a sliding groove is opened on the side wall, and a slider is integrally formed or welded at the corresponding position on the side of the screen plate 3, and the slider is locked in the sliding groove.

[0048] Additionally, the locking structure 4, installed on the side wall of the frame-shaped vibrating frame 2, can lock the end of the screen plate 3. It can be exposed to the outside for easy operation by workers, avoiding the impact of being built into the inner wall of the vibrating frame 2. Specifically, a bolt and nut locking structure 4 can be used. After the bolts on the inner wall are tightened, they can be pressed tightly against the end of the screen plate 3. Then, the nuts can be tightened from the corresponding position on the outer wall of the vibrating frame 2. Conversely, it can be disassembled. Alternatively, a quick-release buckle locking structure 4 can be used, similar to the bolt and nut locking structure 4. After the buckle on the inner wall is moved... The locking structure 4 is pressed against the end of the screen plate 3, and then the buckle is locked from the corresponding position on the outer wall of the vibrating frame 2. Several locking structures 4 need to correspond one-to-one with the ends of several screen plates 3. During normal screening operation, the locking structure 4 plays a role in fixing both ends of the screen plate 3 firmly to the vibrating frame 2, ensuring that the screen plate 3 will not be displaced during vibration. When the screen plate 3 needs to be replaced, simply loosen the locking structure 4 at the corresponding end of the screen plate 3 to achieve sliding disassembly of the screen plate 3, which provides convenience for the maintenance and replacement of the screen plate 3.

[0049] This multi-stage vibrating screen achieves multi-stage separation by dividing the integrated screen plate 3 into multiple screen plates 3 of different specifications arranged sequentially along the material conveying direction and utilizing their vibration. Compared with multi-layer screen plates 3, it improves space utilization and allows materials to be graded and screened according to their characteristics. On the other hand, the screen plates 3 are slidably connected to the vibrating frame 2, and the adjacent screen plates 3 have a height difference and their widths increase sequentially. With the locking structure 4, it ensures the stability of the screen plates 3 during normal operation and allows for easy disassembly and replacement during maintenance, avoiding mutual interference and balancing efficient screening with convenient maintenance.

[0050] In some examples, the specific arrangement of the screen plates 3 can be defined as having a horizontal sliding direction parallel to the material conveying direction. The height of several screen plates 3 decreases sequentially along the material conveying direction, forming a step-like arrangement that conforms to the material movement law, reduces material obstruction and accumulation during transfer, and is more suitable for basic screening operations. The horizontal sliding method also makes it convenient for operators to disassemble and install the screen plates 3. When a screen plate 3 needs to be replaced after unlocking, it can be directly pulled out horizontally without complicated operations.

[0051] In some examples, for the form of locking structure 4, in order to further improve the ease of operation and the locking effect, and to avoid the small contact area between the bolt and nut locking structure 4 or the quick-release buckle locking structure 4 and the end of the screen plate 3, resulting in poor locking effect, a limiting inclined plate 401 and an extrusion block 403 are used to form the locking structure 4. Using the wedge extrusion principle, the extrusion block 403 slides and extrudes a part of the end of the screen plate 3 to lock within the gradually decreasing locking interval 402.

[0052] Specifically, the limiting inclined plate 401 is welded or bolted to the inner wall of the vibrating frame 2 and is located above the end of the screen plate 3. A locking gap 402 is formed between it and the end of the screen plate 3. The length direction of the limiting inclined plate 401 intersects the length direction of the screen plate 3, ensuring that the locking gap 402 gradually decreases. This allows the pressing block 403, which slides on the inner wall of the vibrating frame 2 and is located in the locking gap 402, to press or release the screen plate 3 after sliding. The sliding power of the pressing block 403 is usually manual, which is also suitable for general equipment maintenance scenarios (low maintenance frequency, high requirements for operational flexibility). The sliding pressing block 403 can have a sliding hole opened on the inner wall of the vibrating frame 2, so that part of the pressing block 403 is exposed to the outside through the sliding hole, which is convenient for manual operation.

[0053] Using this locking structure 4 not only improves the locking effect and ease of operation, but also has a compact overall structure that occupies little space, efficiently locking the screen plate 3 within the limited space of the vibrating frame 2.

[0054] Furthermore, since the locking force of the wedge compression principle is relatively large, it is difficult to loosen the compression block 403 manually. Therefore, it is changed to rotational power, which is achieved by the meshing gear 405 and teeth 404. Thus, the compression block 403 can be easily loosened by rotational power using tools such as ratchet wrenches.

[0055] Specifically, the sliding compression block 403 can have a groove on the inner side wall of the vibration frame 2, and the compression block 403 is partially stuck in the groove. Teeth 404 are provided above the compression block 403 on one side of the limiting inclined plate 401. A gear 405 that meshes with it is rotatably provided on the inner side wall of the vibration frame 2, and the shaft of the gear 405 is exposed to the outside, which facilitates connection with tools such as ratchet wrenches.

[0056] Furthermore, the bottom surface of the pressing block 403 generally abuts against the top surface of the end of the screen plate 3, and its sliding direction is parallel to the length direction of the screen plate 3 and its sliding direction. There is only friction between the two. During the unlocking process, the pressing block 403 will basically not drive the screen plate 3 to slide. At the same time, the number of screen plates 3 limits the installation of the power source required for its sliding. Generally, the screen plate 3 is directly slid manually. Therefore, in order to enable the pressing block 403 to drive the screen plate 3 to make partial displacement during the unlocking process, so as to replace part of the manual external force, it is more convenient to remove the screen plate 3.

[0057] like Figures 7-9 As shown, further, as a parallel embodiment, the locking structure 4 can also be implemented by using a lifting locking block 407 instead of the wedge block squeezing principle. By using a direct downward tightening method, it can lock while ensuring the accuracy of the screen plate 3 in the positioning hole 201. During installation, the screen plate 3 is first slid until the positioning post 302 at its bottom is aligned with the positioning hole 201. The two are matched in shape and have a small volume. Since the screen plate 3 is generally made of metal wire mesh, it has a certain elasticity. The downward locking block 407 can push against the end of the screen plate 3, driving the positioning post 302 located directly below it to extend into the positioning hole 201 to complete the locking.

[0058] The lifting and lowering of the locking block 407 can also be achieved by gear meshing. A tooth 404 is provided on one side of the locking block 407, and a gear is rotatably installed on the inner wall of the vibration frame 2. In order to ensure that the locking block 407 is always in a low locked state and to prevent it from rising and resetting under the action of reaction force, a bolt locking method can be used. After the gear rotates to the position, the gear is directly locked to the vibration frame 2 with a nut to complete the fixed connection.

[0059] Furthermore, the addition of the elastic element 408 ensures that while unlocking, the elastic element 408 lifts the positioning column 302, causing it to automatically disengage from the positioning hole 201, and then directly slides out the screen plate 3. Conversely, the elastic element 408 is pressed into the positioning hole 201 by the positioning column 302.

[0060] like Figure 10As shown, in some examples, a frame-shaped primary screen frame 5 is welded to the top of the frame-shaped vibrating frame 2, and at least one sliding screen plate 3 is similarly arranged at the bottom center of it to optimize the screening process, so that the material can be efficiently separated in the primary screening and subsequent screening processes, which can increase the material processing capacity per unit time. Specifically, it can be an integrated sliding screen plate 3, or several screen plates 3 arranged sequentially along the material conveying direction, which can be assembled according to specific requirements.

[0061] It is worth mentioning that the thickness of the primary screening frame 5 gradually decreases from the middle to the edge, and the sliding contact part of the screening plate 3 is concentrated in the middle of the primary screening frame 5. The extrusion blocks 403 on both sides descend and extrude the two ends of the screening plate 3, thus making the screening plate 3 extruded into an "arched" posture. Compared with the traditional "flat" posture, it can further improve the shock resistance of the screening plate 3 and the overall connection strength, thereby improving the screening effect (since the "arched" posture is small, it is not shown in the figure).

[0062] In some examples, the vibration motor 7 provides vibration power to the vibration frame 2, while several springs 6 arranged along the matrix act on the vibration frame 2 at one end and on the base frame 1 at the other end, playing a certain role in buffering and shock absorption, reducing the vibration impact of the equipment on the surrounding environment, and ensuring that the vibration action is carried out smoothly.

[0063] Working principle: The material first enters the screening plate 3 on the primary screening frame 5. The screening plate 3 on the primary screening frame 5 performs preliminary screening of the material, intercepting larger particles or impurities. The material after preliminary screening falls onto other screening plates 3 on the vibrating frame 2. Then the material moves on several screening plates 3 on the vibrating frame 2. The material is separated through the screen holes of different screening plates 3 to achieve graded screening. When the screening plate 3 is disassembled for maintenance, the corresponding locking structure 4 is loosened and the screening plate 3 is slid.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multi-stage vibrating screen that is easy to disassemble, characterized in that, include: Base frame (1); Vibrating frame (2), the vibrating frame (2) is vibrating on the base frame (1), and a plurality of screen plates (3) are slidably connected on the vibrating frame (2). The plurality of screen plates (3) are arranged sequentially along the material conveying direction, and there is a height difference between two adjacent screen plates (3). After the screen plates (3) slide, they are configured to detach from the vibrating frame (2). Several locking structures (4) are provided on the side wall of the vibrating frame (2) and are located at the ends of several screen plates (3) respectively. The locking structures (4) are used to lock the screen plates (3). Among them, the width of several of the screen plates (3) is configured to increase sequentially along the material conveying direction so that the screen plates (3) can avoid the locking structure (4). The locking structure (4) includes: A limiting inclined plate (401) is fixedly installed on the inner side wall of the vibrating frame (2) and located above the screen plate (3). A locking gap (402) is formed between the limiting inclined plate (401) and the end of the screen plate (3). The length direction of the limiting inclined plate (401) intersects the length direction of the screen plate (3). The extrusion block (403) is slidably disposed on the inner side wall of the vibrating frame (2) and located within the locking interval (402). After the extrusion block (403) slides, it is configured to closely adhere to the end of the limiting inclined plate (401) and the screen plate (3) to press the screen plate (3). The vibrating frame (2) is fixedly provided with a primary screening frame (5), and the screening plate (3) is slidably connected on the primary screening frame (5), and the thickness of the primary screening frame (5) gradually decreases from the middle to the edge.

2. The multi-stage vibrating screen that is easy to disassemble according to claim 1, characterized in that, The compression block (403) has teeth (404) on its top, and the locking structure (4) further includes: Gear (405), which is rotatably mounted on the inner side wall of the vibration frame (2) and located on one side of the limiting inclined plate (401), meshes with the teeth (404), and after the gear (405) rotates, it is configured to drive the extrusion block (403) to slide.

3. The multi-stage vibrating screen that is easy to disassemble according to claim 1, characterized in that, The screen plate (3) is horizontally slidably connected to the vibrating frame (2), and the height of several screen plates (3) is configured to decrease sequentially along the material conveying direction.

4. A multi-stage vibrating screen that is easy to disassemble according to claim 1, characterized in that, The vibrating frame (2) has several positioning holes (201) at its bottom, and several screen plates (3) are detachably connected to the several positioning holes (201) one by one. The locking structure (4) also includes: Locking block (407) is raised and lowered on the inner side wall of the vibrating frame (2) and located above the end of the screen plate (3). The locking block (407) is used to press the end of the screen plate (3). After the locking block (407) rises, it is configured to drive the screen plate (3) to be removed from the positioning hole (201) and release the screen plate (3).

5. A multi-stage vibrating screen that is easy to disassemble according to claim 4, characterized in that, The bottom of the sieve plate (3) has a positioning post (302), which is detachably connected to the positioning hole (201). The locking structure (4) further includes: An elastic element (408) is located in the positioning hole (201). One end of the elastic element (408) acts on the screen plate (3) and the other end acts on the vibrating frame (2). The elastic element (408) elastically pushes the screen plate (3) so that the screen plate (3) is disengaged from the positioning hole (201).

6. A multi-stage vibrating screen that is easy to disassemble according to claim 1, characterized in that, Also includes: A plurality of springs (6) are arranged in a matrix, and one end of each spring (6) acts on the vibrating frame (2) and the other end acts on the base frame (1). The springs (6) elastically push the vibrating frame (2) so that the vibrating frame (2) vibrates relative to the base frame (1). Vibration motor (7), which is detachably mounted on the top of the vibration frame (2), is used to drive the vibration frame (2) and the screen plate (3) to vibrate synchronously.

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