Hydrodynamic dust suppressor

Abstract

The utility model discloses a hydrodynamic dust suppressor which comprises a feeding port, the feeding port is formed in the middle of a sealing cover plate, an annular overflow and dust escape partition plate is welded to the bottom end of the sealing cover plate, and flow adjusting screw holes are formed in the sealing cover plate at equal intervals along the circumference. A material buffering hopper is arranged below the material overflowing and dust escaping annular partition plate, lifting lugs which are arranged at equal intervals along the circumference are welded to the outer side of the material buffering hopper, and flow adjusting screw rod holes are formed in the lifting lugs. Dust suppression and collection are achieved through dry bulk materials and airflow dynamic characteristics, and the dust suppression device is compact in structure, high in component simplification degree, wide in material application range, suitable for various particle materials mixed with dust, such as grain crops, mineral powder and cement clinker, and the base is limited in adaptive space and weak in bearing capacity. And the dust suppression capacity is not lower than 85% within the range of + / -20% floating on the basis of the rated flow.

Description

Technical Field

[0001] This utility model relates to the field of dust suppressant technology, specifically a fluid dynamic dust suppressant. Background Technology

[0002] In daily production and life, the existing fluid dynamic dust suppression equipment has the following problems:

[0003] Side-feed type fluid dynamic dust suppressor (e.g.) Figure 10 The feed inlet is located on the side of the equipment. The equipment's external structure consists of a slender cylindrical top and a conical bottom with a slender conical core inside. This type of dust suppressor is difficult to manufacture and requires a relatively high installation height. Due to the side feeding, the conical core is prone to severe local erosion and damage. The installation base needs to consider the load-bearing capacity and resistance to side impacts, making installation difficult. The lack of an internal and external air pressure balancing device severely affects the dust suppression efficiency, which is generally no more than 70%. Moreover, the efficiency is extremely unstable when the material flow fluctuates slightly, and the range of output fluctuations is small. When the output fluctuation exceeds the rated output fluctuation range of ±5%, the dust suppression effect is significantly reduced. During the initial feeding and unloading processes, dust spreads severely, resulting in virtually no dust suppression effect.

[0004] Therefore, there is an urgent need in the market to develop a fluid dynamic dust suppressor for unloading dry bulk materials to circumvent the shortcomings of the existing main technical solutions. Utility Model Content

[0005] This utility model provides a fluid dynamic dust suppressor, which can effectively realize the device driven by fluid power. The device is suitable for small installation space, has light weight, avoids material overflow and dust escape from the gaps between the device components, and has an internal and external pressure balance setting to effectively realize gas-solid separation and relieve internal induced airflow. Within ±20% of the rated flow, the dust suppression capacity is not less than 85%.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fluid dynamic dust suppressor, including a feed inlet, the feed inlet being opened in the middle of a sealing cover plate, an overflow and dust escape annular baffle welded to the bottom end of the sealing cover plate, and material flow regulating screw holes arranged equidistantly along the circumference on the sealing cover plate.

[0007] Below the overflow and dust-escape annular baffle, a material buffer hopper is provided. The outer side of the material buffer hopper is welded with lifting lugs arranged at equal intervals along the circumference. The lifting lugs are provided with flow regulating screw holes.

[0008] The flow regulating screw hole is internally threaded with a flow regulating screw, and the bottom of the flow regulating screw is connected to the lifting lug through the flow regulating screw hole;

[0009] The overflow and dust-escape annular baffle is connected to the material flow adapter via a fixed tie rod.

[0010] The lower end of the material buffer hopper is provided with a cone-shaped material discharge port.

[0011] According to the above technical solution, the centers of the material flow regulating screw hole and the flow rate regulating screw hole are coaxial and have the same diameter.

[0012] According to the above technical solution, the feed inlet is connected to the upper material supply equipment;

[0013] The bottom of the material buffer hopper is the material discharge port.

[0014] According to the above technical solution, the material flow adapter is a spindle-shaped cone.

[0015] According to the above technical solution, the overflow and dust-escape annular baffle is annular and can be inserted into the straight cylinder of the material buffer hopper;

[0016] The material buffer hopper has a cylindrical shape at the top and a conical shape at the bottom, with the top being larger than the bottom.

[0017] According to the above technical solution, the material buffer hopper is fixed to the sealing cover plate through a flow regulating screw, a material flow regulating screw hole, and a flow regulating screw hole.

[0018] According to the above technical solution, a spring damper is installed on the outer side of the top of the flow regulating screw.

[0019] According to the above technical solution, a spring damper is installed on the outer side of the bottom of the flow regulating screw.

[0020] Compared with the prior art, the advantages of this utility model are: the structure of this utility model is scientific and reasonable, and it is safe and convenient to use.

[0021] 1. With feeding at the top of the equipment, the material flow has a large impact surface on the internal structure of the equipment, resulting in uniform scouring and abrasion, reduced impact intensity at the impact point, and extended service life of the equipment.

[0022] 2. The length-to-diameter ratio of the equipment is set more reasonably, the relative material capacity is increased, and under the same output conditions, the volume and height of this type are reduced. The static and dynamic loads of the equipment are reduced, the strength requirements of the installation base are reduced, and the installation space and height are reduced, which can save material costs, manufacturing costs and installation costs.

[0023] 3. The equipment has a symmetrical structure and a symmetrical material flow channel. It is equipped with a spindle-shaped material flow adapter. The material flow adapter forces the material to disperse and flow in all directions along its surface through physical intervention, forming an "overall flow". This avoids the material from accumulating and collapsing at the edge of the material buffer hopper cone, which would cause an instantaneous dust explosion at the material discharge port.

[0024] The material flow channel formed by the cone hopper on the material flow adapter and the inner wall of the material buffer hopper gradually narrows, so that the material flow is fully compressed and the air trapped between the particles is discharged, thus forming a dense material flow column when the material flow leaves the material discharge port.

[0025] By reasonably setting the annular gap between the maximum diameter of the material flow adapter and the inner diameter of the material buffer hopper, the flow rate can be regulated, the upward induced airflow can be slowed down, the amount of dust carried by the induced airflow can be reduced, and "gas-solid separation" can be achieved to reduce the pressure relief at the gap between the overflow and dust annular baffle and the material buffer hopper.

[0026] 4. An overflow and dust escape ring baffle is installed on the lower end of the sealing cover plate. During operation, it can effectively prevent raw materials from overflowing. At the same time, the overflow and dust escape baffle, together with the accumulated material, forms a "material seal" for the dust in the upward induced airflow, preventing internal dust from escaping into the external atmosphere. Attached Figure Description

[0027] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0028] In the attached diagram:

[0029] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0031] Figure 3 This is a schematic diagram of the experimental simulation structure of this utility model;

[0032] Figure 4 This is a three-dimensional structural schematic diagram of Embodiment 2 of this utility model;

[0033] Figure 5 This is a cross-sectional structural diagram of Embodiment 2 of this utility model;

[0034] Figure 6 This is a schematic diagram of the experimental simulation structure of Embodiment 2 of this utility model;

[0035] Figure 7 This is a three-dimensional structural schematic diagram of Embodiment 3 of this utility model;

[0036] Figure 8 This is a cross-sectional structural diagram of Embodiment 3 of this utility model;

[0037] Figure 9 This is a schematic diagram of the experimental simulation structure of Embodiment 3 of this utility model;

[0038] Figure 10 This is a schematic diagram of the feeding direction structure of a side-feeding type fluid dynamic dust suppressor, which is one of the main technologies currently available on the market.

[0039] The following are labeled in the diagram: 1. Feed inlet; 2. Material flow adapter fixing rod; 3. Material flow regulating screw hole; 4. Flow regulating screw; 5. Flow regulating screw hole; 6. Lifting lug; 7. Material buffer hopper; 8. Sealing cover plate; 9. Overflow and dust escape ring baffle; 10. Material flow adapter; 11. Material discharge port; 12. Spring damper. Detailed Implementation

[0040] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0041] Example 1:

[0042] like Figure 1-3 As shown, the present invention provides a technical solution, a fluid dynamic dust suppressor, including a feed inlet 1, which is connected to an upper material supply device to facilitate normal feeding. The feed inlet 1 is opened in the middle of a sealing cover plate 8. An overflow and dust escape ring baffle 9 is welded to the bottom of the sealing cover plate 8. Material flow regulating screw holes 3 are opened on the sealing cover plate 8 at equal intervals along the circumference.

[0043] Below the overflow and dust-escape annular baffle 9, there is a material buffer hopper 7. The material buffer hopper 7 has a straight cylindrical shape at the top and a conical shape at the bottom with a larger top and a smaller bottom. The overflow and dust-escape annular baffle 9 is annular and can be inserted into the straight cylinder of the material buffer hopper 7, which facilitates better space utilization and prevents overflow. The material buffer hopper 7 has lifting lugs 6 arranged equidistantly along the circumference welded on the outside. The lifting lugs 6 have flow adjustment screw holes 5.

[0044] The flow regulating screw hole 3 is internally threaded with a flow regulating screw 4. The bottom of the flow regulating screw 4 is connected to the lifting lug 6 through the flow regulating screw hole 5. The centers of the flow regulating screw hole 3 and the flow regulating screw hole 5 are coaxial and have the same diameter, which facilitates connection and installation.

[0045] The overflow and dust-free annular baffle 9 is connected to the material flow adapter 10 via the material flow adapter fixing rod 2. The material flow adapter 10 is a spindle-shaped cone, which can reduce resistance.

[0046] For greater stability, the material buffer hopper 7 is fixed to the sealing cover plate 8 by the flow regulating screw 4, the material flow regulating screw hole 3, and the flow regulating screw hole 5. The lower end of the material buffer hopper 7 is provided with a cone-shaped material discharge port 11, which facilitates normal material discharge.

[0047] The working principle and usage process of this utility model: The material flow enters from the inlet 1 on the sealing cover plate 8 of the fluid dynamic dust suppressor. The material flow impacts the upper conical surface of the adapter 10. The material flow spreads outward along the conical surface of the material flow adapter 10, exhibiting a downward flow and circumferential material distribution state. During this process, the frictional resistance between the material flow and the surface of the material flow adapter 10 increases, the material flow velocity decreases, and the collision energy between material particles weakens, thus suppressing the generation of internal dust. During this process, the material flow is forced to form an overall flow, preventing the material from accumulating at the edge of the material buffer hopper 7 and then collapsing, which would cause an instantaneous dust explosion at the material discharge port 11. The annular gap formed between the maximum diameter of the material flow adapter 10 and the material buffer hopper 7 plays a role in regulating the flow rate, slowing down the upward induced airflow, and reducing the amount of dust carried by the induced airflow, thereby achieving "gas-solid separation" and reducing the dust escape phenomenon between equipment components.

[0048] The conical structure of the material flow adapter 10 and the inner wall of the material buffer hopper 7 form a gradually narrowing material flow channel. When the material flows through, the air trapped between the particles is squeezed out, which causes the material flow to form a dense material flow column when it leaves the material discharge port 11. The dense material flow column falls at a gradually increasing speed under the action of gravity. Due to the Venturi effect, a low-pressure area is formed in the center of the material flow column during the falling process, and a high-pressure area is formed around the material flow column, which in turn forms an air cushion barrier to suppress the lateral dispersion of dust. When the material flow reaches the bottom material surface, the material flow column remains dense and will not generate impact dust due to the shearing action of particles and air and the squeezing between particles.

[0049] Within ±20% of the rated flow rate, if the actual output is too low, adjust the flow regulating screw 4 downwards synchronously until the actual output requirement is met; if the actual output is too high, adjust the flow regulating screw 4 upwards synchronously until the actual output requirement is met.

[0050] Within ±20% of the rated flow rate, if excessive dust is generated near the material discharge port 11, during the material falling process, or at the impact point of the falling surface, the flow rate regulating screw 4 should be adjusted upwards synchronously until the standard requirements are met.

[0051] Example 2:

[0052] like Figure 4-6 As shown, this utility model provides a technical solution: a fluid dynamic dust suppressor, wherein a spring damper 12 is installed on the outer side of the top of the flow regulating screw 4.

[0053] Example 3:

[0054] like Figure 7-9 As shown, this utility model provides a technical solution: a fluid dynamic dust suppressor, wherein a spring damper 12 is installed on the outer side of the bottom of the flow regulating screw 4.

[0055] Compared with Example 1, Examples 2 and 3 include the following additions:

[0056] 1. Based on the material accumulation and flow load in the material buffer hopper, the spring damper automatically adjusts the annular gap between the maximum diameter of the material flow adapter and the inner wall of the material buffer hopper to prevent blockage or excessive flow, thereby adaptively matching the optimal flow rate and reducing upward induced airflow and dust escape.

[0057] 2. Spring dampers can absorb the vibration energy generated during material flow, reduce structural wear, and extend the service life of equipment;

[0058] 3. The impact load of the material flow is transmitted to the spring damper, causing the spring damper to vibrate and optimize the uniform distribution of material in the material buffer hopper.

[0059] The working principle and usage process of this utility model: The material flow enters from the inlet 1 on the sealing cover plate 8 of the fluid dynamic dust suppressor. The material flow impacts the upper conical surface of the material flow adapter 10. The material flow spreads outward along the conical surface of the material flow adapter 10, and flows downward and circumferentially. The impact load of the material flow is transmitted to the spring damper 12. The spring damper 12 begins to vibrate, accelerating the uniform distribution of material in the material buffer hopper 7 and accelerating the formation of dense material columns. As the material accumulation in the material buffer hopper 7 increases, the pressure applied to the spring damper 12 gradually increases, the compression of the spring damper 12 gradually increases, the annular gap formed between the maximum diameter of the material flow adapter 10 and the inner wall of the material buffer hopper 7 becomes larger, and the material flow rate gradually increases. When the feed rate and discharge rate in the material buffer hopper 7 are equal, the material accumulation in the material buffer hopper 7 tends to stabilize.

[0060] During this process, the frictional resistance between the material flow and the surface of the material flow adapter 10 increases, the material flow speed decreases, the collision energy between material particles weakens, and the generation of internal dust is suppressed. During this process, the material flow is forced to form an overall flow to avoid the material from accumulating at the edge of the material buffer hopper 7 and then collapsing, which would cause an instantaneous dust explosion at the material discharge port 11.

[0061] During this process, the annular gap formed between the maximum diameter of the material flow adapter 10 and the inner diameter of the material buffer hopper 7 plays a role in regulating the flow rate, slowing down the upward induced airflow, and reducing the amount of dust carried by the induced airflow, thereby achieving "gas-solid separation". During this process, the conical structure of the material flow adapter 10 and the inner wall of the material buffer hopper 7 form a gradually narrowing material flow channel. The air trapped between the continuously compressed material flow particles is discharged, which causes the material flow to form a dense material flow column when it leaves the material discharge port 11. The dense material flow column gradually increases its falling speed under the action of gravity acceleration. Due to the Venturi effect, a low-pressure area is formed in the center of the material flow column during the falling process, and a high-pressure area is formed around the material flow column, thereby forming an air cushion barrier to suppress the lateral dispersion of dust. When the material flow reaches the bottom material surface, the material flow column remains dense and will not generate impact dust due to the shearing action of particles and air and the compression between particles.

[0062] Within ±20% of the rated flow rate, if the actual output is too low, adjust the flow regulating screw 4 downwards synchronously until the actual output requirement is met; if the actual output is too high, adjust the flow regulating screw 4 upwards synchronously until the actual output requirement is met.

[0063] Within ±20% of the rated flow rate, if excessive dust is generated near the material discharge port 11, during the material falling process, or at the impact point of the falling surface, causing the surrounding air dust concentration to exceed the standard, the flow rate regulating screw 4 should be adjusted upward synchronously until the standard requirements are met.

[0064] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydrodynamic dust suppressor, comprising an inlet (1), characterized in that: The feed inlet (1) is located in the middle of the sealing cover plate (8). An overflow and dust-escape annular partition (9) is welded to the bottom of the sealing cover plate (8). Material flow regulating screw holes (3) are arranged equidistantly along the circumference on the sealing cover plate (8). Below the overflow and dust-escape annular baffle (9) is a material buffer hopper (7), and the material buffer hopper (7) is welded with lifting lugs (6) arranged equidistantly along the circumference on the outside of the material buffer hopper (7). The lifting lugs (6) are provided with flow regulating screw holes (5). The flow regulating screw hole (3) is internally threaded with a flow regulating screw (4), and the bottom of the flow regulating screw (4) is connected to the lifting lug (6) through the flow regulating screw hole (5); The overflow and dust-escape annular baffle (9) is connected to the material flow adapter (10) via a material flow adapter fixing rod (2); The lower end of the material buffer hopper (7) is provided with a cone-shaped material discharge port (11).

2. The fluid dynamic dust suppressor according to claim 1, characterized in that, The centers of the material flow regulating screw hole (3) and the flow rate regulating screw hole (5) are coaxial and have the same diameter.

3. The fluid dynamic dust suppressor according to claim 1, characterized in that, The feed inlet (1) is connected to the upper material supply equipment; The bottom of the material buffer hopper (7) is the material discharge port (11).

4. A fluid dynamic dust suppressor according to claim 1, characterized in that, The material flow adapter (10) is a spindle-shaped cone.

5. A fluid dynamic dust suppressor according to claim 1, characterized in that, The overflow and dust-escape annular baffle (9) is annular and can be inserted into the straight cylinder of the material buffer hopper (7); The material buffer hopper (7) has a cylindrical shape at the top and a conical shape at the bottom, with the top being larger than the bottom.

6. A fluid dynamic dust suppressor according to claim 1, characterized in that, The material buffer hopper (7) is fixed to the sealing cover plate (8) by the flow regulating screw (4), the material flow regulating screw hole (3), and the flow regulating screw hole (5).

7. A fluid dynamic dust suppressor according to claim 1, characterized in that, A spring damper (12) is installed on the outer side of the top of the flow regulating screw (4).

8. A fluid dynamic dust suppressor according to claim 1, characterized in that, A spring damper (12) is installed on the outer side of the bottom of the flow regulating screw (4).

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