Dust pipeline explosion-proof structure

Abstract

The utility model discloses a dust pipeline explosion-proof structure which comprises a dust airflow pipe, a dust airflow channel is arranged in the dust airflow pipe, a fan is arranged on the outer side of the dust airflow pipe, the air outlet end of the fan is vertically communicated and connected with the dust airflow channel through a dust dilution pipe, and a diffusion impeller is coaxially and rotatably arranged at the air outlet end of the dust dilution pipe. An atomizer is arranged on one side outside the dust airflow pipe and is communicated and connected with the dust airflow channel through a tubular atomizing nozzle; the water solution can be more uniformly sprayed to each area in the dust airflow pipe through the atomizer and the atomizing nozzle, and meanwhile, a large amount of air is uniformly introduced into each area in the dust airflow pipe through the fan and the dust diluting pipe, so that the dust concentration in each area in the dust airflow pipe is reduced, and the dust concentration in each area in the dust airflow pipe is reduced. Furthermore, the water solution sprayed by the atomizer and the atomizing nozzle is more uniformly distributed in each area in the dust airflow pipe, so that the dust can be effectively prevented from exploding in the dust airflow pipe.

Description

Technical Field

[0001] This utility model relates to the field of industrial dust removal technology, and more specifically to an explosion-proof structure for dust ducts. Background Technology

[0002] Dust ducts often contain a large amount of dust. If the dust reaches a certain concentration, it is prone to explosion when it encounters a source of ignition or static electricity, causing serious injury to personnel and equipment. Existing explosion-proof devices achieve the effect of eliminating static electricity by spraying an aqueous solution into the duct. However, the aqueous solution is still unevenly distributed after entering the duct, which means that some areas still have the risk of explosion. Summary of the Invention

[0003] Purpose of the invention: To overcome the shortcomings of existing technologies, this utility model provides an explosion-proof structure for dust ducts. Through an atomizer and atomizing nozzle, the aqueous solution can be sprayed more evenly into every area of ​​the dust flow duct. Simultaneously, a large amount of air is evenly introduced into every area of ​​the dust flow duct using a fan and a dust dilution pipe. This reduces the dust concentration in each area of ​​the dust flow duct and further ensures that the aqueous solution sprayed by the atomizer and atomizing nozzle is more evenly distributed in every area of ​​the dust flow duct, effectively preventing dust from exploding within the dust flow duct.

[0004] Technical Solution: To achieve the above objectives, this utility model provides an explosion-proof structure for dust ducts, including a dust airflow pipe, a dust airflow channel inside the dust airflow pipe, a fan installed on the outside of the dust airflow pipe, the outlet end of the fan being vertically connected to the dust airflow channel through a dust dilution pipe, a diffuser impeller being coaxially rotatably installed at the outlet end of the dust dilution pipe, and an atomizer being installed on one side outside the dust airflow pipe, the atomizer being connected to the dust airflow channel through a tubular atomizing nozzle.

[0005] Furthermore, an impeller support is installed on the inner wall of the dilution tube, and the impeller shaft of the diffuser impeller is rotatably mounted on the impeller support via bearings.

[0006] Furthermore, the middle part of the dust dilution pipe is vertically connected to the pipe wall of the dust airflow pipe, the outlet end of the dust dilution pipe extends into the interior of the dust airflow channel, and the diffuser impeller is located in the dust airflow channel and is coaxial with the outlet end of the dust dilution pipe.

[0007] Furthermore, a bearing mounting ring is provided at the center of the impeller support. The bearing mounting ring is coaxially arranged with the dust dilution pipe. The bearing is coaxially mounted on the bearing mounting ring. The upper end of the impeller shaft is coaxially mounted inside the bearing. The impeller shaft can rotate relative to the impeller support around its own axis. The impeller shaft extends along the axis of the dust dilution pipe to the outlet end of the dust dilution pipe. Several axial flow fan blades are distributed in a circumferential array on the lower end of the impeller shaft.

[0008] Furthermore, each axial fan blade is positioned below the dust dilution pipe, and the upper contour surface of each axial fan blade is located below the air outlet of the dust dilution pipe.

[0009] Furthermore, the liquid inlet end of the atomizer is connected to a solution supply pipe 8.

[0010] Furthermore, the outer wall of the atomizing nozzle is vertically connected to the wall of the dust airflow pipe, and the nozzle's spray end is located inside the dust airflow channel.

[0011] Furthermore, the extension lines of the atomizing nozzle axis and the dust dilution pipe axis intersect on the axis of the dust flow pipe, and the extension lines of the atomizing nozzle axis, the dust dilution pipe axis, and the dust flow pipe axis are perpendicular to each other.

[0012] Beneficial effects: This utility model provides an explosion-proof structure for dust ducts. Through an atomizer and atomizing nozzle, the aqueous solution can be sprayed more evenly to every area inside the dust airflow duct. At the same time, a large amount of air is evenly introduced into every area inside the dust airflow duct through a fan and a dust dilution pipe. While reducing the dust concentration in each area of ​​the dust airflow duct, it further makes the aqueous solution sprayed by the atomizer and atomizing nozzle more evenly distributed in every area inside the dust airflow duct, which can effectively prevent dust from exploding inside the dust airflow duct. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the axial structure of a dust pipeline explosion-proof structure according to the present invention;

[0014] Figure 2 This is an enlarged cross-sectional view of region a of this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] As attached Figure 1 As shown, an explosion-proof structure for a dust duct includes a dust airflow pipe 1, a dust airflow channel 9 inside the dust airflow pipe 1, an airflow containing dust particles flowing through the dust airflow channel 9, and a dust concentration detector installed in the dust airflow channel 9 to monitor the dust concentration in the dust airflow channel 9 in real time. The dust concentration detector is connected to the control system via a wireless connection. Figure 1As shown, a fan 4 is installed on the outside of the dust airflow pipe 1. The control system can control the opening and closing of the fan 4. The air outlet of the fan 4 is vertically connected to the dust airflow channel 9 through the dust dilution pipe 5. A diffuser impeller 67 is installed on the same axis rotating at the air outlet of the dust dilution pipe 5. The diffuser impeller 67 is an axial flow impeller. An atomizer 2 is installed on one side outside the dust airflow pipe 1. The control system can control the starting or stopping of the atomizer 2. The atomizer 2 is vertically installed to the dust airflow pipe 1. The atomizer 2 is connected to the dust airflow channel 9 through a tubular atomizing nozzle 3. A solution supply pipe 8 is connected to the liquid inlet of the atomizer 2.

[0017] The middle section of the dust dilution pipe 5 is integrally and vertically connected to the wall of the dust airflow pipe 1. The outlet end of the dust dilution pipe 5 extends into the interior of the dust airflow channel 9. The diffuser impeller 67 is located in the dust airflow channel and is coaxial with the outlet end of the dust dilution pipe 5. The middle section of the dust dilution pipe 5 is integrally and vertically connected to the wall of the dust airflow pipe 1, and the outlet end of the dust dilution pipe 5 is located inside the dust airflow channel 9. The middle section of the atomizing nozzle 3 is integrally and vertically connected to the wall of the dust airflow pipe 1, and the spraying end of the atomizing nozzle 3 is located inside the dust airflow channel 9. This ensures that... When the dust airflow pipe 1 is explosion-proof, the dust particles in the dust airflow pipe 1 will not overflow the range of the dust airflow channel 9. The extension line 10 of the axis of the atomizing nozzle 3 and the extension line 11 of the axis of the dust dilution pipe 5 intersect on the axis of the dust airflow pipe 1. The extension line 10 of the axis of the atomizing nozzle 3, the extension line 11 of the axis of the dust dilution pipe 5 and the axis of the dust airflow pipe 1 are perpendicular to each other. This allows the diffuser impeller 67 at the outlet of the dust dilution pipe 5 to evenly disperse the atomized water solution sprayed from the spray end of the atomizing nozzle 3 into all areas of the dust pipe 1.

[0018] like Figure 2As shown, an impeller support 61 is installed on the inner wall of the dust dilution pipe 5. The impeller shaft 64 of the diffuser impeller 67 is rotatably mounted on the impeller support 61 via a bearing 63. A bearing mounting ring 62 is provided at the center of the impeller support 61. The bearing mounting ring 62 is coaxially arranged with the dust dilution pipe 5. The bearing 63 is coaxially mounted on the bearing mounting ring 62. The upper end of the impeller shaft 64 is coaxially mounted inside the bearing 63. The impeller shaft 64 can rotate relative to the impeller support 61 around its own axis. The impeller shaft 64 extends along the axial direction of the dust dilution pipe 5 to the air outlet end of the dust dilution pipe 5, and the lower end face of the impeller shaft 64 is located below the air outlet 66 of the dust dilution pipe 5. Several axial flow fan blades 65 are distributed in a circumferential array at the lower end of the impeller shaft 64. Each axial flow fan blade 65 is located below the dust dilution pipe 5, and the upper contour surface of each axial flow fan blade 65 is located below the dust dilution pipe 5. Below the air outlet 66, when the airflow in the dust dilution pipe 5 impacts each axial fan blade 65, the force of the airflow on each axial fan blade 65 causes each axial fan blade 65 to simultaneously perform circular motion in the same direction around the axis of the impeller shaft 64. This allows the airflow to diffuse into every area within the dust airflow channel 9 under the rotation of each axial impeller 65. At the same time, it can also neutralize the airflow containing dust in the dust airflow channel 9, making the dust concentration in the dust airflow channel 9 tend to be the same, preventing local explosions caused by excessive dust concentration in some areas. Simultaneously, the simultaneous circular motion of each axial fan blade 65 around the axis of the impeller shaft 64 can also diffuse the atomized water mist sprayed from the spray end of the atomizing nozzle 3, allowing the atomized water mist sprayed from the spray end of the atomizing nozzle 3 to be evenly diffused into every area within the dust airflow channel 9.

[0019] The working principle of this dust duct explosion-proof structure is as follows: When the dust concentration detector installed in the dust airflow channel 9 detects that the dust concentration in the dust airflow pipe 1 has reached the warning value, the dust concentration detector sends a warning signal to the control system. After receiving the warning signal, the control system controls the atomizer 2 to start, so that the aqueous solution flowing from the solution supply pipe 8 into the atomizer 2 is atomized, thereby spraying the atomized aqueous solution into the dust airflow pipe 1 from the spray end of the atomizing nozzle 3, thereby reducing the static electricity in the dust airflow pipe 1 and preventing static electricity from being generated by friction between dust particles and the cavity wall of the dust airflow channel 9. This can lead to an explosion of dust in the dust flow pipe 1. Simultaneously, the control system activates the fan 4, causing its airflow to pass through the dust dilution pipe 5 and enter the dust flow pipe 1. This airflow dilutes the dust-laden airflow in the dust flow pipe 1, reducing the dust concentration. As a result, the dust particles in the dust flow pipe 1 do not meet the explosion conditions and cannot explode. During this process, the airflow generated by the fan 4 flows into the dust dilution pipe 5 and exits from its outlet into the dust flow channel 9. When the airflow in the dust dilution pipe 5 impacts the axial fan blades 65 located below the outlet 66 of the dust dilution pipe 5, the impact force of the airflow on each axial fan blade 65 drives each axial fan blade 65 to rotate simultaneously around the axis of the impeller shaft 64. This disperses the airflow ejected from the outlet of the dust dilution pipe 5, ensuring that the airflow is evenly distributed throughout each area of ​​the dust flow pipe 1. This makes the dust concentration in each area of ​​the dust flow pipe 1 more uniform, thus preventing dust particles from scattering in the dust flow pipe 1 due to uneven concentration. Localized explosion; simultaneously, the airflow dispersed by each axial fan blade 65 can diffuse the atomized aqueous solution sprayed from the atomizing nozzle 3, so that the aqueous solution mist after being atomized by the atomizer 2 and the atomizing nozzle 3 can be evenly diffused to every area in the dust airflow pipe 1, thereby effectively eliminating static electricity in every area in the dust airflow pipe 1, thus avoiding dust explosion caused by static electricity generated by friction between dust particles and the cavity wall of the dust airflow channel 9. At the same time, the aqueous solution mist can also effectively prevent the occurrence of ignition sources in the dust airflow pipe 1, thereby avoiding dust explosion caused by ignition sources.

[0020] The above are the preferred embodiments described in this 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 this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A dust duct explosion-proof structure, characterized in that: The system includes a dust airflow pipe (1), inside which is a dust airflow channel (9). A fan (4) is installed on the outside of the dust airflow pipe (1). The air outlet of the fan (4) is vertically connected to the dust airflow channel (9) through a dust dilution pipe (5). A diffuser impeller (67) is installed on the coaxial axis at the air outlet of the dust dilution pipe (5). An atomizer (2) is installed on one side outside the dust airflow pipe (1). The atomizer (2) is connected to the dust airflow channel (9) through a tubular atomizing nozzle (3).

2. The explosion-proof structure for dust ducts according to claim 1, characterized in that: An impeller support (61) is installed on the inner wall of the dilution tube (5), and the impeller shaft (64) of the diffuser impeller (67) is rotatably mounted on the impeller support (61) via a bearing (63).

3. The explosion-proof structure for dust ducts according to claim 2, characterized in that: The middle part of the dust dilution pipe (5) is vertically connected to the pipe wall of the dust airflow pipe (1). The outlet end of the dust dilution pipe (5) extends into the interior of the dust airflow channel (9). The diffuser impeller (67) is located in the dust airflow channel (9) and is coaxial with the outlet end of the dust dilution pipe (5).

4. The explosion-proof structure for dust ducts according to claim 2, characterized in that: A bearing mounting ring (62) is provided at the center of the impeller support (61). The bearing mounting ring (62) is coaxially arranged with the dust dilution pipe (5). The bearing (63) is coaxially mounted on the bearing mounting ring (62). The upper end of the impeller shaft (64) is coaxially mounted in the bearing (63). The impeller shaft (64) can rotate relative to the impeller support (61) around its own axis. The impeller shaft (64) extends along the axial direction of the dust dilution pipe (5) to the air outlet end of the dust dilution pipe (5). Several axial flow fan blades (65) are distributed in a circular array on the lower end of the impeller shaft (64).

5. The explosion-proof structure for dust ducts according to claim 4, characterized in that: Each of the axial flow fan blades (65) is disposed below the dust dilution pipe (5), and the upper contour surface of each of the axial flow fan blades (65) is located below the air outlet (66) of the dust dilution pipe (5).

6. The explosion-proof structure for dust ducts according to claim 1, characterized in that: The liquid inlet end of the atomizer (2) is connected to a solution supply pipe (8).

7. The explosion-proof structure for dust ducts according to claim 1, characterized in that: The outer wall of the atomizing nozzle (3) is integrally and vertically connected to the wall of the dust airflow pipe (1), and the nozzle (3) is located inside the dust airflow channel (9).

8. The explosion-proof structure for dust ducts according to claim 1, characterized in that: The extension line (10) of the axis of the atomizing nozzle (3) and the extension line (11) of the axis of the dust dilution pipe (5) intersect on the axis of the dust airflow pipe (1), and the extension line (10) of the axis of the atomizing nozzle (3), the extension line (11) of the axis of the dust dilution pipe (5) and the axis of the dust airflow pipe (1) are perpendicular to each other.

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