Ultrasonic suspended screen

Abstract

The utility model relates to screening equipment technical field, the utility model provides ultrasonic wave suspension screen, including base, support, screen frame, screen cloth and ultrasonic wave vibration generation module, the support is established on the base, and can vibrate on the base with the outside vibration subassembly, the screen frame is established on the support, the screen cloth is established on the screen frame, the ultrasonic wave vibration generation module is established on the screen cloth, the ultrasonic wave vibration generation module can make the screen cloth produce additional vibration on the basis that the support drives the screen cloth to vibrate. The ultrasonic wave vibration generation module can make the screen cloth produce additional high-frequency vibration on the basis of basic vibration. The sticky wet coal raw materials that have not been screened are in the suspension state on the screen cloth, the adhesion, gathering and friction phenomenon between it and the screen cloth are weakened, thereby the possibility of the sticky wet coal raw materials wedging into the screen hole is reduced. Through the above technical scheme, the technical problem that sticky wet coal screening is easy to block the screen hole in the related art is solved.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of screening equipment technology, specifically to an ultrasonic suspension screen. Background Technology

[0002] Coal, as one of the world's most important basic energy sources, occupies a crucial position in the global energy structure. Screening is an essential step in the coal preparation process at coal preparation plants. The purpose of screening is to classify raw coal according to particle size, so that coal of different particle sizes can be processed accordingly in subsequent stages.

[0003] However, in actual production, raw coal contains a certain amount of powdery material. When this raw coal comes into contact with water during washing, dust removal, and other processes, the powder becomes sticky and wet. This sticky powder adheres to the screen during screening, clogging the screen holes and preventing particles that meet the size requirements from passing through the screen in time, thus slowing down the screening process. Cleaning the screen also consumes time and manpower, increasing production costs and labor intensity.

[0004] Therefore, how to solve the problem of screen clogging caused by sticky and wet coal has become a technical challenge that the coal preparation industry urgently needs to overcome, which is of great significance for improving the production efficiency, product quality and economic benefits of coal preparation plants. Utility Model Content

[0005] To overcome the above-mentioned defects, embodiments of this utility model provide an ultrasonic suspension screen, which solves the technical problem of easy clogging of screen holes when screening sticky and wet coal in related technologies.

[0006] According to one aspect, at least one embodiment of the present invention provides an ultrasonic suspension screen, including a base, a support, a screen frame, a screen mesh, and an ultrasonic vibration generating module. The support is disposed on the base and can vibrate on the base by means of an external vibration component. The screen frame is disposed on the support, the screen mesh is disposed on the screen frame, and the ultrasonic vibration generating module is disposed on the screen mesh. The ultrasonic vibration generating module can generate additional vibrations in the screen mesh on the basis of the support driving the screen mesh to vibrate.

[0007] For example, the ultrasonic suspension screen provided in at least one embodiment of this utility model further includes: The screens are multiple and spaced apart, and each screen is equipped with an ultrasonic vibration generating module.

[0008] For example, the ultrasonic suspension screen provided in at least one embodiment of this utility model further includes: The support is equipped with a protective cover, and the support, the sieve frame, the sieve mesh and the ultrasonic vibration generating module are all located inside the protective cover.

[0009] For example, the ultrasonic suspension screen provided in at least one embodiment of this utility model further includes: The protective cover is provided with a hopper for adding materials to the screen, and a material dispersing mechanism for breaking up clumps of material is provided between the hopper and the screen.

[0010] For example, the ultrasonic suspension screen provided in at least one embodiment of this utility model further includes: The material dispersing mechanism includes an outer cylinder and an inner cone. The outer cylinder is rotatably disposed within the protective cover. The diameter of the outer cylinder gradually decreases from top to bottom, and a first material dispersing tooth is provided on its inner wall. The inner cone is disposed inside the outer cylinder. The diameter of the inner cone gradually increases from top to bottom, and a second material dispersing tooth is provided on its outer wall. A material dispersing space for receiving and dispersing materials is formed between the outer cylinder and the inner cone. The inner cone can rotate eccentrically relative to the outer cylinder to disperse materials by means of the first and second material dispersing teeth.

[0011] For example, the ultrasonic suspension screen provided in at least one embodiment of this utility model further includes: A first drive motor is installed inside the protective cover, and a drive gear is rotatably installed inside the protective cover. The drive gear is connected to the output shaft of the first drive motor. A drive gear ring that meshes with the drive gear is sleeved on the outer wall of the outer cylinder. The drive gear ring can rotate under the drive of the drive gear to synchronously drive the outer cylinder to rotate.

[0012] For example, the ultrasonic suspension screen provided in at least one embodiment of this utility model further includes: The protective cover is also equipped with a second drive motor, which is located at the center of the outer cylinder. A crankshaft is provided between the output shaft of the second drive motor and the inner cone. The two ends of the crankshaft are respectively hinged to the output shaft of the second drive motor and the center of the bottom surface of the inner cone. The crankshaft is used to drive the inner cone to rotate eccentrically relative to the outer cylinder.

[0013] For example, the ultrasonic suspension screen provided in at least one embodiment of this utility model further includes: An actuator is provided inside the protective cover, and multiple protrusions are spaced apart along the circumference of the outer wall of the outer cylinder. The multiple protrusions can strike the actuator in sequence under the drive of the rotation of the outer cylinder, so as to make the outer cylinder vibrate and shake off the material adhering to the inner wall.

[0014] For example, the ultrasonic suspension screen provided in at least one embodiment of this utility model further includes: A rubber buffer ring is provided between the drive gear ring and the outer cylinder.

[0015] For example, the ultrasonic suspension screen provided in at least one embodiment of this utility model further includes: The external vibration component is a vibration motor mounted on the bracket. The vibration motor is used to drive the bracket to vibrate. A shock-absorbing spring is provided between the bracket and the base.

[0016] The beneficial effects of the embodiments of this utility model are as follows: In this invention, after the external vibration component is activated, it transmits the vibration to the support. The support drives the screen frame and screen to generate basic vibration, so that the screen frame and screen reciprocate at a certain frequency and amplitude, thereby generating an excitation force on the sticky and wet coal material placed on the screen, causing the sticky and wet coal material to jump and roll on the screen. At the same time, it is conveyed forward under the action of the screen's tilt angle, realizing the basic screening and raw material conveying functions.

[0017] The ultrasonic vibration generator module can induce additional high-frequency vibrations in the screen on top of the basic vibration. This module generates high-frequency mechanical vibrations and transmits them to the screen. Due to the high frequency of the ultrasonic vibrations, the screen surface experiences high-frequency micro-vibrations. When the sticky, wet coal material that is not screened comes into contact with the screen, it is subjected to these high-frequency micro-vibrations and remains suspended on the screen. This reduces adhesion, aggregation, and friction between the material and the screen, thereby decreasing the likelihood of the sticky, wet coal material wedging into the screen openings. Simultaneously, it ensures that the screen opening size does not decrease due to clogging, maintaining the effective screening area and ensuring the fineness and quality of the screening. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0019] Figure 1 This is a front view structural diagram of an ultrasonic suspension screen in one embodiment of the present invention; Figure 2 for Figure 1 A side view of the ultrasonic suspension screen in the embodiment; Figure 3 for Figure 1 A schematic diagram of the sieve structure in the embodiment; Figure 4 for Figure 1 A schematic diagram of the bulk material handling mechanism at one angle in one embodiment; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 for Figure 1 A schematic diagram of the bulk material handling mechanism from another angle in one embodiment; Figure 7 for Figure 1 A top view of the outer cylinder and inner cone in the embodiment; Figure 8 for Figure 1 A schematic diagram of the inner cone structure in the embodiment.

[0020] In the diagram: 1. Base, 2. Support, 3. Screen frame, 4. Screen mesh, 5. Ultrasonic vibration generating module, 6. Protective cover, 7. Hopper, 8. Material dispersing mechanism, 801. Outer cylinder, 802. Inner cone, 8011. First material dispersing tooth, 8021. Second material dispersing tooth, 803. Material dispersing space, 804. First drive motor, 805. Drive gear, 806. Drive gear ring, 807. Second drive motor, 808. Crankshaft, 809. Actuating part, 810. Protrusion, 811. Rubber buffer ring, 9. Vibration motor, 10. Shock-absorbing spring. Detailed Implementation

[0021] 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 present invention and not intended to limit its scope.

[0022] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0023] 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 connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] 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.

[0025] 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 this utility model.

[0026] 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.

[0027] like Figures 1-8 The diagram illustrates an ultrasonic suspending screen according to an embodiment of the present invention, comprising a base 1, a support 2, a screen frame 3, a screen mesh 4, and an ultrasonic vibration generating module 5. The base 1 serves as the basic support component for the entire ultrasonic suspending screen. The support 2 is mounted on the base 1, the screen frame 3 is mounted on the support 2, and the screen mesh 4 is mounted on the screen frame 3. The support 2 can vibrate on the base 1 with the aid of an external vibration component, thereby driving the screen frame 3 and the screen mesh 4 to vibrate. The ultrasonic vibration generating module 5 is mounted on the screen mesh 4. The ultrasonic vibration generating module 5 can generate high-frequency mechanical vibration and transmit it to the screen mesh 4, ensuring that the screen mesh 4 can generate additional high-frequency vibration on top of the vibration driven by the support 2. The ultrasonic vibration generating module 5 is an existing component, generally comprising an ultrasonic generator and an ultrasonic concentrator. Its principle is that the ultrasonic generator converts the input electrical energy into mechanical vibration through piezoelectric ceramics (or magnetostrictive materials), and then the ultrasonic concentrator concentrates the vibration energy to the end and amplifies the amplitude.

[0028] Working principle: After the external vibration component is started, it transmits the vibration to the support 2. The support 2 drives the screen frame 3 and screen 4 to generate basic vibration, so that the screen frame 3 and screen 4 reciprocate at a certain frequency and amplitude, thereby generating a vibration force on the sticky and wet coal material placed on the screen 4, causing the sticky and wet coal material to jump and roll on the screen 4. At the same time, it is conveyed forward under the action of the tilt angle of the screen 4, realizing the basic screening and raw material conveying functions.

[0029] The ultrasonic vibration generating module 5 can generate additional high-frequency vibrations in the screen 4 on top of the basic vibration. The ultrasonic vibration generating module 5 generates high-frequency mechanical vibrations and transmits them to the screen 4. Due to the high frequency of the ultrasonic vibrations, the surface of the screen 4 experiences high-frequency micro-vibrations. When the sticky, wet coal material that has not been screened comes into contact with the screen 4, it is subjected to this high-frequency micro-vibration and remains suspended on the screen 4. This reduces adhesion, aggregation, and friction between the material and the screen 4, thereby decreasing the possibility of the sticky, wet coal material wedging into the screen holes. Simultaneously, it ensures that the screen hole size does not decrease due to clogging, maintaining the effective screening area of ​​the screen 4 and ensuring the fineness and quality of the screening.

[0030] In some examples, such as Figure 3 As shown, multiple screens 4 are arranged at intervals within the screen frame 3, and each screen 4 is equipped with an ultrasonic vibration generating module 5. A protective cover 6 is installed on the outside of the support 2.

[0031] Working Principle: When the screen 4 is large, a single ultrasonic vibration generating module 5 may not be able to generate uniform and effective high-frequency vibration across the entire screen 4. Areas at the edges of the screen 4 or far from the ultrasonic vibration generating module 5 may not generate sufficient vibration, thus affecting the screening effect. However, by setting ultrasonic vibration generating modules 5 on multiple screens 4, each module only needs to handle the vibration of a smaller area of ​​the screen 4, ensuring that each screen 4 generates effective high-frequency vibration. The separate ultrasonic vibration generating modules 5 on multiple screens 4 allow adjacent screens 4 to generate high-frequency vibration independently, avoiding mutual interference. When a screen 4 is damaged, only the corresponding screen 4 and its ultrasonic vibration generating module 5 need to be replaced individually, without replacing the entire screen 4 structure, improving the ease of equipment maintenance. The protective cover 6 reduces noise propagation, confining the noise generated during equipment operation within the cover 6. It also prevents wet coal from splashing out during screening, reducing the corrosion of the equipment by external factors such as dust and moisture.

[0032] In some examples, such as Figures 4-8 As shown, a hopper 7 is provided on the protective cover 6 to facilitate the introduction of sticky and wet coal raw materials. A material dispersing mechanism 8 is provided between the hopper 7 and the screen 4. The material dispersing mechanism 8 includes an outer cylinder 801 and an inner cone 802. The outer cylinder 801 is rotatably mounted inside the protective cover 6, and its diameter gradually decreases from top to bottom. Multiple first material dispersing teeth 8011 are evenly distributed on the inner wall. The inner cone 802 is located inside the outer cylinder 801, and its diameter gradually increases from top to bottom. Multiple second material dispersing teeth 8021 are provided on the outer wall. A material dispersing space 803 is formed between the outer cylinder 801 and the inner cone 802.

[0033] A drive gear ring 806 is fitted on the outer wall of the outer cylinder 801, and the drive gear ring 806 meshes with a drive gear 805 installed inside the protective cover 6. A first drive motor 804 is fixed inside the protective cover 6, and its output shaft is connected to the drive gear 805. When the first drive motor 804 starts, the drive gear 805 rotates accordingly, thereby driving the drive gear ring 806 and the outer cylinder 801 to rotate synchronously. The inner cone 802 is located inside the outer cylinder 801. A second drive motor 807 is installed inside the protective cover 6 and located at the center of the outer cylinder 801. One end of the crankshaft 808 is hinged to the output shaft of the second drive motor 807, and the other end is hinged to the center of the bottom surface of the inner cone 802. When the second drive motor 807 starts, the crankshaft 808 enables the inner cone 802 to perform an eccentric rotational motion relative to the outer cylinder 801.

[0034] Working Principle: After the sticky and wet coal raw material is fed into the hopper 7, it first falls into the material distribution space 803 between the outer cylinder 801 and the inner cone 802. The outer cylinder 801 rotates continuously under the drive of the first drive motor 804, and the first material distribution teeth 8011 on its inner wall continuously agitate the material. The inner cone 802 rotates eccentrically under the action of the second drive motor 807 and the crankshaft 808, constantly changing the shape of the material distribution space 803. At the same time, it causes relative motion between the second material distribution teeth 8021 and the first material distribution teeth 8011, thereby tearing, cutting and dispersing the material. After being fully dispersed, the material is no longer in a clump state and can fall from the material distribution space 803 to the screen 4 below for normal screening.

[0035] In some examples, such as Figure 5 As shown, the actuator 809 is disposed inside the protective cover 6. Multiple protrusions 810 are spaced circumferentially along the outer wall of the outer cylinder 801. The protrusions 810 are hemispherical in shape and can impact the actuator 809 when the outer cylinder 801 rotates. When the outer cylinder 801 rotates under the drive of the gear ring 806, the protrusions 810 on the outer wall rotate accordingly. As the outer cylinder 801 rotates, the protrusions 810 sequentially impact the actuator 809, causing the outer cylinder 801 to vibrate. During the dispersion process, sticky wet coal raw materials may adhere to the inner wall of the outer cylinder 801. The vibration of the outer cylinder 801 can break the adhesion, thereby shaking off the adhered material and preventing material accumulation on the cylinder wall.

[0036] If the vibration of the outer cylinder 801 is transmitted to the drive gear 805 through the drive gear ring 806, it will be detrimental to the stability of the transmission. Therefore, a rubber buffer ring 811 is provided. The rubber buffer ring 811 is sleeved on the outer cylinder 801 and contacts the inner surface of the drive gear ring 806. The rubber buffer ring 811 can absorb and buffer the vibration of the outer cylinder 801, thereby preventing the vibration force from being transmitted to the drive gear 805 through the drive gear ring 806, ensuring the smoothness of the transmission between the drive gear 805 and the drive gear ring 806, and improving the operational reliability of the equipment.

[0037] The external vibration component is preferably a vibrating motor 9 mounted on the support 2, with a damping spring 10 installed between the support 2 and the base 1. When the vibrating motor 9 operates, the excitation force generated is transmitted to the support 2, causing the support 2 to drive the screen frame 3, screen 4, and other components to vibrate, aiding in the screening and conveying of materials on the screen 4. The damping spring 10 absorbs and buffers some of the vibration energy, reducing the transmission of vibration to the base 1, thereby reducing the impact force of vibration on the base 1 and extending the service life of the equipment.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model 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 solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An ultrasonic suspension screen, characterized in that, The device includes a base (1), a support (2), a sieve frame (3), a sieve mesh (4), and an ultrasonic vibration generating module (5). The support (2) is mounted on the base (1) and can vibrate on the base (1) with the aid of an external vibration component. The sieve frame (3) is mounted on the support (2), the sieve mesh (4) is mounted on the sieve frame (3), and the ultrasonic vibration generating module (5) is mounted on the sieve mesh (4). The ultrasonic vibration generating module (5) can generate additional vibrations in the sieve mesh (4) on the basis of the vibration driven by the support (2). A protective cover (6) is provided outside the support (2), and the support (2), the sieve frame (3), the sieve (4) and the ultrasonic vibration generating module (5) are all located inside the protective cover (6); The protective cover (6) is provided with a hopper (7) for adding materials to the screen (4), and a material dispersing mechanism (8) for breaking up clumps of materials is provided between the hopper (7) and the screen (4). The material dispersing mechanism (8) includes an outer cylinder (801) and an inner cone (802). The outer cylinder (801) is rotatably disposed inside the protective cover (6). The diameter of the outer cylinder (801) gradually decreases from top to bottom, and the inner wall is provided with a first material dispersing tooth (8011). The inner cone (802) is disposed inside the outer cylinder (801). The diameter of the inner cone (802) gradually increases from top to bottom, and the outer wall is provided with a second material dispersing tooth (8021). A material dispersing space (803) for receiving and dispersing materials is formed between the outer cylinder (801) and the inner cone (802). The inner cone (802) can rotate eccentrically relative to the outer cylinder (801) to disperse materials by means of the first material dispersing tooth (8011) and the second material dispersing tooth (8021).

2. The ultrasonic suspension screen according to claim 1, characterized in that, There are multiple screens (4) arranged at intervals, and each screen (4) is provided with an ultrasonic vibration generating module (5).

3. The ultrasonic suspension screen according to claim 1, characterized in that, The protective cover (6) is provided with a first drive motor (804), and a drive gear (805) is rotatably provided inside the protective cover (6). The drive gear (805) is connected to the output shaft of the first drive motor (804). The outer wall of the outer cylinder (801) is fitted with a drive gear ring (806) that meshes with the drive gear (805). The drive gear ring (806) can rotate under the drive of the drive gear (805) to synchronously drive the outer cylinder (801) to rotate.

4. The ultrasonic suspension screen according to claim 3, characterized in that, The protective cover (6) is also provided with a second drive motor (807). The second drive motor (807) is located at the center of the outer cylinder (801). A crankshaft (808) is provided between the output shaft of the second drive motor (807) and the inner cone (802). The two ends of the crankshaft (808) are respectively hinged to the output shaft of the second drive motor (807) and the center of the bottom surface of the inner cone (802). The crankshaft (808) is used to drive the inner cone (802) to rotate eccentrically relative to the outer cylinder (801).

5. The ultrasonic suspension screen according to claim 4, characterized in that, An actuator (809) is provided inside the protective cover (6). Multiple protrusions (810) are provided circumferentially on the outer wall of the outer cylinder (801). The multiple protrusions (810) can strike the actuator (809) in sequence under the drive of the rotation of the outer cylinder (801), so that the outer cylinder (801) vibrates and shakes off the material adhering to the inner wall.

6. The ultrasonic suspension screen according to claim 5, characterized in that, A rubber buffer ring (811) is provided between the drive gear ring (806) and the outer cylinder (801).

7. The ultrasonic suspension screen according to claim 1, characterized in that, The external vibration component is a vibration motor (9) installed on the bracket (2). The vibration motor (9) is used to drive the bracket (2) to vibrate. A shock-absorbing spring (10) is provided between the bracket (2) and the base (1).

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