Airflow classifier with dust collection mechanism

Abstract

This utility model provides an air classifier with a dust collection mechanism, belonging to the technical field of air classifiers. It includes a frame, on which a feed hopper, a primary turbine classifier, a secondary turbine classifier, and a bag-type collection box are sequentially connected along the dust airflow processing steps. A horizontal partition is fixed to the top of the bag-type collection box, and an output pipe is connected to the top cavity of the bag-type collection box. A high-pressure induced draft fan is fixed to the end of the output pipe away from the bag-type collection box and connected to a silencer pipe. Symmetrically installed on both sides of the bag-type collection box are hinged doors. Horizontal support plates are fixed to the inner sides of both doors corresponding to the positions of the partitions. Several filter bags are installed on the lower end face of the support plates, and symmetrically formed mating grooves on both sides of the partitions allow the support plates to engage.

Description

Technical Field

[0001] The utility model relates to the technical field of air classifiers, in particular to an air classifier with a dust collecting mechanism. Background Art

[0002] An air classifier is key equipment for achieving fine classification in the powder industry. It usually separates materials according to particle size through the air flow generated by a turbine rotor and an induced draft fan, and the fine dust after separation needs to be captured by an efficient collecting mechanism. Among them, bag collectors are widely used due to their high collection efficiency.

[0003] However, the structure of the bag collector integrated in the air classifier in the prior art is relatively simple, and the filter bags are usually fixedly installed in a closed dust collection box. When the filter bags reach their service life or need to be cleaned, the entire classification system must be stopped, and it takes a lot of time to open the box, remove the old filter bags and install new filter bags. This maintenance method not only causes production interruption and reduces efficiency, but also easily affects the airtightness for subsequent use due to aging or damage of seals during disassembly and installation, and there is a risk of dust leakage. In addition, the high-pressure induced draft fan matched with the air classifier will generate high-intensity noise during operation, which pollutes the working environment.

[0004] Therefore, the present application provides an air classifier with a dust collecting mechanism to meet the demand. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide an air classifier with a dust collecting mechanism to solve the problems that when the existing air classifier uses a bag collector for dust collection, it is inconvenient to replace the filter bag, resulting in low maintenance efficiency, and the operation noise of the air classifier equipment is high.

[0006] In order to solve the above technical problem, the utility model provides the following technical solutions: An air classifier with a dust collecting mechanism comprises a frame, wherein a feed hopper, a primary turbine classifier, a secondary turbine classifier and a bag-type collection box are sequentially connected and arranged on the frame along the dust airflow processing procedure, a horizontal partition plate is fixed on the top of the bag-type collection box, a top compartment of the bag-type collection box is connected with an output pipe, and a high-pressure induced draft fan is fixed at one end of the output pipe far away from the bag-type collection box and connected with a silencing pipe; Doors that can be opened by hinging are symmetrically installed on both sides of the bag-type collection box, horizontal support plates are fixed on the inner sides of the two doors corresponding to the position of the partition plate, a plurality of filter bags are installed on the lower end face of the support plates, and docking grooves for the support plates to clamp into are symmetrically opened on both sides of the partition plate.

[0007] Optionally, the mating groove is a semi-circular groove, and a sealing gasket is fixed to the inner wall of the mating groove.

[0008] Optionally, the support plate is a semi-circular horizontal plate adapted to the docking groove, and the support plate is provided with a plurality of mounting holes, and the filter bag is fixed to the lower end of the mounting holes.

[0009] Optionally, the bottom of the bag-type collection box is configured as a collection hopper, and the lower end of the collection hopper is provided with an air-closed discharge valve.

[0010] Optionally, the lower end of the silencer pipe is provided with an air inlet and connected to the air outlet of the high-pressure induced draft fan.

[0011] Optionally, the silencer pipe is provided with a primary silencer chamber, a secondary silencer chamber and a tertiary silencer chamber in sequence, starting from the air inlet.

[0012] Optionally, a delivery pipe extending into the third-stage silencing chamber is installed in the first-stage silencing chamber, a return air pipe extending into the second-stage silencing chamber is installed in the third-stage silencing chamber, and an exhaust pipe extending out of the upper end of the silencing pipe is installed in the second-stage silencing chamber.

[0013] Optionally, the port of the delivery pipe located inside the primary silencer cavity is fixed with an air inlet, the air inlet facing the air inlet at the bottom of the silencer pipe.

[0014] Optionally, a buffer mesh cover is fixed inside the air intake hopper.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects: In the above solution, by setting up a hinged door on both sides, a support plate fixed inside the door, and a docking groove with a sealing gasket on the partition, when the filter bag needs to be replaced, the entire filter bag assembly can be moved out of the box along with the support plate for maintenance simply by opening the door. When closed, the support plate can be accurately inserted into the docking groove to form a reliable seal, achieving the effect of quick and convenient filter bag replacement without shutting down the entire line, while ensuring the airtightness of the system. In the above scheme, by connecting the outlet of the high-pressure induced draft fan to a multi-stage silencing chamber (first-stage silencing chamber, second-stage silencing chamber, and third-stage silencing chamber) and a silencing pipe with internal delivery pipe, return air pipe, exhaust pipe, and buffer screen, the high-speed airflow can undergo multiple expansions, decelerations, and buffering within the silencing pipe. This can reduce the aerodynamic noise generated by the fan operation, improve the working environment, and reduce noise pollution.

[0016] In summary, this device not only improves the convenience of filter bag maintenance and ensures maintenance efficiency, but also effectively reduces equipment operating noise, resulting in good overall performance. Attached Figure Description

[0017] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the open structure of the bag-type collector of this utility model; Figure 3 This is a schematic diagram of the structure of the partition plate of this utility model; Figure 4 This is a schematic diagram of the silencer tube in this utility model; Figure 5 for Figure 4 An enlarged schematic diagram of the structure at point A in the middle.

[0019] Figure label: 1. Frame; 2. Feed hopper; 3. Primary turbine classifier; 4. Secondary turbine classifier; 5. Bag collection box; 501. Partition plate; 502. Collection hopper; 503. Closed-loop discharge valve; 504. Box door; 505. Support plate; 506. Mounting hole; 507. Filter bag; 508. Docking groove; 509. Sealing gasket; 6. Output pipe; 7. High-pressure blower; 8. Silencing pipe; 801. Primary silencer chamber; 802. Secondary silencer chamber; 803. Tertiary silencer chamber; 804. Conveying pipe; 805. Return air pipe; 806. Exhaust pipe; 807. Air inlet hopper; 808. Buffer mesh cover.

[0020] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0021] The air classifier with a dust collection mechanism provided by this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0022] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0023] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0024] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0025] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0026] like Figures 1 to 5 As shown, an embodiment of this utility model provides an airflow classifier with a dust collection mechanism, including a frame 1 that can be climbed by workers and equipped with a maintenance platform. The frame 1 is sequentially connected with a feed hopper 2, a primary turbine classifier 3, a secondary turbine classifier 4, and a bag-type collection box 5 according to the dust airflow processing flow. The material to be classified is fed into the feed hopper 2 and undergoes preliminary classification in the primary turbine classifier 3. The coarser particles separated are collected, while the airflow containing fine dust enters the secondary turbine classifier 4 for further fine classification. The classified fine dust is then carried by the airflow into the bag-type collection box 5 for final collection.

[0027] The bag-type collection box 5 has a horizontal partition 501 installed on its top by welding or bolting. This partition 501 divides the interior of the bag-type collection box 5 into an upper clean air chamber and a lower dust-containing chamber. An output pipe 6 is connected to the side or top of the clean air chamber. The end of the output pipe 6 away from the bag-type collection box 5 is connected to the air inlet of a high-pressure induced draft fan 7. The air outlet of the high-pressure induced draft fan 7 is connected to a silencer pipe 8 to reduce exhaust noise.

[0028] For ease of maintenance, hinged doors 504 are symmetrically installed on both sides of the bag-type collection box 5, allowing them to be opened outwards. On the inner wall of each door 504, at a position corresponding to the height of the internal partition 501, a horizontally positioned support plate 505 is fixed. This support plate 505 is preferably a semi-circular plate with multiple rows of mounting holes 506. A filter bag 507 is installed at the lower end of each mounting hole 506, and the upper end of the filter bag 507 is fixed to the mounting hole 506 by a clamp or sealing ring. Correspondingly, symmetrical mating grooves 508, matching the shape of the support plate 505, are formed on both sides of the internal partition 501. When the door 504 is closed, the support plate 505 can fit precisely into the corresponding mating groove 508. To ensure a tight seal, a sealing gasket 509 made of elastic rubber is adhered and fixed to the inner wall of the mating groove 508. This design allows the filter bag 507 to be modularized on the door 504. During maintenance, the entire filter bag assembly can be removed by opening the door 504, which greatly facilitates replacement and cleaning.

[0029] The bottom of the bag-type collection box 5 is constructed as a conical collection hopper 502 to collect dust that is shaken off or falls off the surface of the filter bag 507. A closed-loop discharge valve 503 is installed at the bottom outlet of the collection hopper 502. This valve 503 can discharge the collected dust intermittently or continuously while maintaining a negative pressure inside the box to prevent dust from escaping.

[0030] In addition, for exhaust noise reduction, the lower end of the silencer pipe 8 is provided with an air inlet, which is connected to the air outlet of the high-pressure induced draft fan 7 via a flange. The interior of the silencer pipe 8, from the air inlet upwards, forms a primary silencer chamber 801, a secondary silencer chamber 802, and a tertiary silencer chamber 803. A delivery pipe 804 extends from the primary silencer chamber 801, its inlet end penetrating into the tertiary silencer chamber 803; a return air pipe 805 extends from the tertiary silencer chamber 803, its outlet end penetrating into the secondary silencer chamber 802; and an exhaust pipe 806 extends from the secondary silencer chamber 802 out of the upper end of the silencer pipe 8, discharging the purified gas into the atmosphere. In specific implementation, a horn-shaped air inlet 807 is fixedly installed at the inlet end of the delivery pipe 804 located within the primary silencer chamber 801, with the opening of the air inlet 807 directly facing the air inlet at the bottom of the silencer pipe 8. To further reduce airflow impact noise, a buffer mesh cover 808 made of metal wire mesh is also fixedly installed inside the air intake hopper 807.

[0031] The working principle of the technical solution provided by this utility model is as follows: During operation, the material enters the system through the feed hopper 2. After being classified by two-stage turbines, the dust-laden airflow enters the dust-laden chamber of the bag collection box 5 under the suction action of the high-pressure induced draft fan 7. The dust is trapped on the outer surface of the filter bag 507. The purified gas passes through the filter bag 507, through the clean air chamber above the partition 501, and through the output pipe 6 into the high-pressure induced draft fan 7. Subsequently, the high-pressure airflow enters the silencer pipe 8.

[0032] Inside the silencer duct 8, the airflow first impacts the buffer mesh 808 inside the air intake hopper 807, achieving initial buffering and noise reduction. It then sequentially passes through the delivery pipe 804, the third-stage silencer chamber 803, the return air duct 805, and the second-stage silencer chamber 802, finally exiting through the exhaust duct 806. In this multi-stage, tortuous path, the airflow energy is continuously consumed, and the sound waves are effectively attenuated, thus achieving a significant noise reduction effect.

[0033] When maintenance of the filter bag 507 is required, simply open the housing door 504, and the support plate 505 will detach from the docking groove 508, allowing for easy cleaning or replacement of the filter bag 507. After completion, close the housing door 505, and the support plate 505 will re-engage in the well-sealed docking groove 508, restoring operation. Collected dust accumulates in the collection hopper 502 and is periodically discharged through the closed-loop discharge valve 503. The entire equipment features a reasonable structural design, convenient maintenance, low noise, high collection efficiency, and excellent overall performance.

[0034] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An air classifier with a dust collection mechanism, comprising a frame (1), characterized in that, The frame (1) is sequentially connected with a feed hopper (2), a primary turbine classifier (3), a secondary turbine classifier (4), and a bag collection box (5) along the dust airflow processing procedure. A horizontal partition (501) is fixed to the top of the bag collection box (5). An output pipe (6) is connected to the top cavity of the bag collection box (5). A high-pressure blower (7) is fixed to the end of the output pipe (6) away from the bag collection box (5) and connected to a silencer pipe (8). The bag-type collection box (5) is symmetrically equipped with hinged doors (504) on both sides. Horizontal support plates (505) are fixed on the inner sides of the two doors (504) corresponding to the positions of the partition (501). A number of filter bags (507) are installed on the lower end face of the support plate (505), and docking grooves (508) are symmetrically opened on both sides of the partition (501) for the support plate (505) to be inserted.

2. The air classifier with a dust collection mechanism according to claim 1, characterized in that, The docking groove (508) is a semi-circular groove, and a sealing gasket (509) is fixed on the inner wall of the docking groove (508).

3. The air classifier with a dust collection mechanism according to claim 2, characterized in that, The support plate (505) is a semi-circular horizontal plate adapted to the docking groove (508), and the support plate (505) has a plurality of mounting holes (506), and the filter bag (507) is fixed to the lower end of the mounting holes (506).

4. The air classifier with a dust collection mechanism according to claim 1, characterized in that, The bottom of the bag collection box (5) is configured as a collection hopper (502), and the lower end of the collection hopper (502) is provided with a closed-loop discharge valve (503).

5. The air classifier with a dust collection mechanism according to claim 1, characterized in that, The lower end of the silencer pipe (8) is provided with an air inlet and is connected to the air outlet of the high-pressure induced draft fan (7).

6. The air classifier with a dust collection mechanism according to claim 5, characterized in that, The silencer pipe (8) is provided with a first-level silencer chamber (801), a second-level silencer chamber (802) and a third-level silencer chamber (803) in sequence, starting from the air inlet.

7. The air classifier with a dust collection mechanism according to claim 6, characterized in that, The primary silencing chamber (801) is equipped with a delivery pipe (804) extending into the tertiary silencing chamber (803), the tertiary silencing chamber (803) is equipped with a return air pipe (805) extending into the secondary silencing chamber (802), and the secondary silencing chamber (802) is equipped with an exhaust pipe (806) extending out of the upper end of the silencing pipe (8).

8. The air classifier with a dust collection mechanism according to claim 7, characterized in that, The port of the delivery pipe (804) located inside the primary silencer cavity (801) is fixed with an air inlet (807), and the air inlet (807) faces the air inlet at the bottom of the silencer pipe (8).

9. The air classifier with a dust collection mechanism according to claim 8, characterized in that, A buffer mesh cover (808) is fixed inside the air intake hopper (807).

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