Dust suppression and powder selection device for aggregate production

Abstract

The utility model relates to the technical field of constructional engineering, and provides a dust suppression and powder selection device for aggregate production, which comprises a guide chute, a dust suppression cover, an axial flow fan, a closing-up air pipe and a variable frequency controller, the dust suppression cover is mounted at the top end of the guide chute, the axial flow fan is mounted at the tail end of the guide chute, an air outlet of the axial flow fan is connected with the closing-up air pipe, and the variable frequency controller is connected with the dust suppression cover. The device can effectively adjust the powder content of aggregate such as stones and the like through precisely designed airflow control and material separation mechanisms, the powder content of the stones can be adjusted from 19%-21% to 9%-12% so as to meet the requirements of specific markets, the device can be operated without complex training, and meanwhile, the device is easy to maintain and low in cost. And the dependence on professional technicians is reduced, and the operation and maintenance difficulty and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a dust suppression and powder selection device for aggregate production. Background Art

[0002] In the aggregate production process, material transportation is a key link, but this link often produces a large amount of dust. Powder content is an important indicator of aggregate. Aggregates of different particle sizes have different requirements for powder content. For example, the powder content of stone chips (0-5mm) is generally controlled between 19% and 21%. Such aggregates can be directly used in civil engineering projects without special requirements. However, in order to meet specific powder content requirements, the aggregates usually need to be further processed.

[0003] Traditionally, a powder classifier is the main equipment for handling the powder content of aggregates. Through its complex mechanical structure and airflow control, the powder classifier can effectively separate the dust from the aggregate, thereby achieving the purpose of adjusting the powder content. However, the investment and maintenance costs of a powder classifier are relatively high.

[0004] In addition, the operation and maintenance of the powder classifier is relatively complicated and requires professional technicians to manage and maintain it. This not only increases the operating costs of the enterprise, but also limits the application of the powder classifier in a wider range of fields.

[0005] To this end, those skilled in the art have proposed an aggregate production dust suppression and powder selection device to solve the problems raised in the background technology. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a dust suppression and powder selection device for aggregate production. Through simple structural design and airflow control, the equipment can effectively reduce the dust content in the aggregate while maintaining low investment and maintenance costs.

[0007] A dust suppression and powder selection device for aggregate production includes a material guide trough, a dust suppression hood, an axial flow fan, a closing air duct, and a frequency conversion controller. The dust suppression hood is installed at the top of the material guide trough, the axial flow fan is installed at the tail end of the material guide trough, the air outlet of the axial flow fan is connected to the closing air duct, and the axial flow fan is controlled by the frequency conversion controller.

[0008] Preferably, the material guide chute is composed of at least two sections, each section is 3 meters long, the top in contact with the discharge funnel is closed with a flat plate, and the discharge port is closed with a curtain.

[0009] Preferably, the dust suppression hood is installed on the upper part of the material guide trough that is not in contact with the discharge funnel, and the contact surface is sealed; the part of the top of the dust suppression hood other than the contact with the dust collecting hood is closed with a flat plate, and all objects in contact with the dust suppression hood are sealed.

[0010] Preferably, the dust collecting hood is connected to the dust collector through an air duct, the diameter of one end of the axial flow fan closing air duct is 300mm, the diameter of the other end is 400mm, the 400mm diameter end is equipped with a flange, and the axial flow fan is fixed on the closing air duct and connected by bolts.

[0011] Preferably, a frequency converter is further included, which is installed on the power circuit and is used to adjust the speed of the axial flow fan, so as to achieve the purpose of controllable air volume.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Through the precisely designed airflow control and material separation mechanism, this device can effectively adjust the powder content of aggregates such as stone chips to meet specific market demands such as 19%-21% (the powder content of stone chips with a content of 19%-21% can be adjusted to 9%-12% to meet specific market demands).

[0014] 2. The device is intuitive to operate. The air volume can be flexibly controlled by adjusting the fan speed through the frequency converter. No complex training is required to get started. At the same time, the equipment is simple to maintain, which reduces the dependence on professional technicians and reduces the difficulty and cost of operation and maintenance. By optimizing the airflow path and dust removal efficiency, this device reduces dust emissions while also reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of the present utility model.

[0016] In the figure: 1. Unloading belt conveyor; 11. Unloading funnel; 12. Material guide chute; 13. Dust suppression hood; 2. Dust collection hood; 21. Dust collector dust suction duct; 3. Axial flow fan; 31. Frequency conversion controller; 32. Closing duct; 4. Receiving belt conveyor. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] As attached Figure 1 As shown:

[0019] Embodiment 1: The utility model provides a dust suppression and powder selection device for aggregate production, including a guide trough 12, a dust suppression cover 13, an axial flow fan 3, a closing air duct 32, and a frequency conversion controller 31. The dust suppression cover 13 is installed at the top of the guide trough 12, and the axial flow fan 3 is installed at the tail end of the guide trough 12. The air outlet of the axial flow fan 3 is connected to the closing air duct 32. The axial flow fan 3 is controlled by the frequency conversion controller 31. The guide trough 12 is composed of at least two sections, each section is 3 meters long, the top contacting the discharge funnel 11 is closed with a flat plate, and the discharge port is closed with a curtain. The dust suppression cover 13 is installed at the top of the guide trough 12 that is not in contact with the discharge funnel. The funnel 11 contacts the upper part of the material guide trough 12, and the contact surface is sealed; the top of the dust suppression hood 13 other than the contact with the dust collecting hood 2 is closed with a flat plate, and all objects in contact with the dust suppression hood 13 are sealed. The dust collecting hood 2 is connected to the dust collector through an air duct, and the diameter of the axial flow fan 3 is 300mm at one end and 400mm at the other end. The 400mm diameter end is flanged, and the axial flow fan 3 is fixed on the closing air duct 32 and connected by bolts. It also includes a frequency converter, which is installed on the power circuit to adjust the speed of the axial flow fan 3, so as to achieve the purpose of controllable air volume.

[0020] Specifically, the axial flow fan 3 and the closing air duct 32 use a 380V, 400mm diameter axial flow fan 3, which is installed at the tail end of the guide trough 12 and the wind speed is adjusted by a frequency converter. The air outlet of the axial flow fan 3 is connected to the closing air duct. The diameter of the closing air duct is 300mm at one end and 400mm at the other end. The 400mm diameter end is equipped with a flange to facilitate fixation in the guide trough 12 and extends 50mm to enhance the airflow gathering effect.

[0021] Specifically, the dust collector is connected to the dust hood 2 through an air duct and is used to collect fine-grained materials blown up by the fan. The air volume of the dust collector needs to be controlled according to actual needs to avoid collecting materials with a mesh size of 200 or above and causing wear on the air duct.

[0022] Working principle: Aggregate enters the guide chute 12 from the discharge funnel 11 and the conveying process begins. The guide chute 12 is made of wear-resistant material to ensure that the material will not cause equipment wear during the conveying process. The top of the guide chute 12 and the contact part of the discharge funnel 11 are closed with a flat plate, and the discharge port is closed with a curtain to reduce material splashing and dust diffusion. The dust suppression cover 13 is installed on the upper part of the guide chute 12 that is not in contact with the discharge funnel 11 to further suppress the flying of dust. After the axial flow fan 3 is started, a stable airflow is generated. The speed of the axial flow fan 3 is adjusted by the frequency conversion controller to accurately control the speed and direction of the airflow. The airflow is blown out from the axial flow fan 3 and enters the guide chute 12 through the closing air duct. The airflow It interacts with the falling aggregates, blows up the fine-grained materials, makes them lift up and move forward quickly. Due to the difference in air flow speed, the larger particles of aggregate fall naturally under the action of gravity, while the fine-grained materials are carried forward by the air flow. When the fine-grained materials enter the second section of the guide chute 12, the wind pressure is released and becomes smaller due to the increase in space, causing some fine-grained materials to fall again, and the ultra-fine materials below -200 mesh are sucked into the dust removal air duct under the mesh pressure of the dust removal fan, and are finally collected and processed by the dust collector. According to the powder content of the aggregate and the treatment effect, the speed of the axial flow fan 3 is adjusted in real time by the frequency conversion controller, thereby adjusting the air flow speed to achieve continuous control of the powder content.

[0023] All standard parts used in this utility model can be purchased commercially, and special-shaped parts can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as bolts, rivets, welding, etc. that are mature in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. In addition, the circuit connections adopt conventional connection methods in the existing technology and will not be described in detail here. Any matters not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0024] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. "Multiple" means two or more, unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples and the features of different embodiments or examples described in this specification without contradiction.

[0028] In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dust suppression and powder selection device for aggregate production, characterized by: The invention comprises a material guide trough (12), a dust suppression cover (13), an axial flow fan (3), a closing air duct (32), and a frequency conversion controller (31), wherein the dust suppression cover (13) is installed at the top end of the material guide trough (12), the axial flow fan (3) is installed at the tail end of the material guide trough (12), the air outlet of the axial flow fan (3) is connected to the closing air duct (32), and the axial flow fan (3) is controlled by the frequency conversion controller (31).

2. The dust suppression and powder selection device for aggregate production according to claim 1, characterized in that: The guide trough (12) is composed of at least two sections, each section is 3 meters long, the top contacting the discharge funnel (11) is closed with a flat plate, and the discharge port is closed with a curtain.

3. The dust suppression and powder separation device for aggregate production according to claim 1, characterized in that: The dust suppression cover (13) is installed on the upper part of the material guide trough (12) that is not in contact with the discharge funnel (11), and the contact surface is sealed; the part of the top of the dust suppression cover (13) other than the part in contact with the dust collecting cover (2) is sealed with a flat plate, and all objects in contact with the dust suppression cover (13) are sealed.

4. The dust suppression and powder selection device for aggregate production according to claim 3, characterized in that: The dust collecting hood (2) is connected to the dust collector through an air duct. The diameter of one end of the air duct of the axial flow fan (3) is 300 mm, and the diameter of the other end is 400 mm. The 400 mm diameter end is equipped with a flange. The axial flow fan (3) is fixed on the air duct (32) and connected by bolts.

5. The dust suppression and powder selection device for aggregate production according to claim 1, characterized in that: It also includes a frequency converter, which is installed on the power circuit and is used to adjust the speed of the axial flow fan (3) to achieve the purpose of controlling the air volume.

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