Pneumatic foam dust removal fan of heading machine

Abstract

The pneumatic foam dust removal fan comprises a fan cavity, a pneumatic motor and a bubble blowing machine, a settling chamber and a dust removal chamber are arranged in the fan cavity, an air inlet is formed in the side of the settling chamber, the air inlet is connected with an air inlet barrel, a dust outlet is formed in the bottom of the settling chamber, an air outlet is formed in the side of the dust removal chamber, and an air outlet is formed in the air outlet. The bottom of the settling chamber is provided with a sewage outlet, the pneumatic motor is arranged between the settling chamber and the dust removal chamber, the top end of the dust removal chamber is communicated with the bubble blowing machine, and the bubble blowing machine is provided with a water inlet and an air inlet. The pneumatic foam dust removal fan of the heading machine is small in size, light and convenient, the water consumption is reduced, and the dust removal efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of dust removal equipment for roadheaders, and in particular to a pneumatic foam dust removal fan for roadheaders. Background Art

[0002] The roadheader needs to remove dust during the mining process. The dust removal equipment used on the existing roadheader mainly includes a dust removal fan and a spray mechanism. The water mist sprayed by the spray mechanism combines with the dust and flows out by falling under its own weight. The sewage is discharged from the sewage outlet or recycled, and the purified air is discharged from the exhaust outlet. The large amount of water mist in this dust removal equipment can cause the belt or track to slip, which poses a safety hazard. The dust removal fan is large and heavy, and it is time-consuming and laborious to move with the movement of the roadheader. Summary of the invention

[0003] In order to solve the problems in the prior art that the dust removal fan used in the tunnel boring machine is large and heavy and the spray mechanism sprays a large amount of water, the present invention proposes a pneumatic foam dust removal fan for the tunnel boring machine.

[0004] The technical solution of the present invention is achieved in this way: A pneumatic foam dust removal fan for a tunnel boring machine comprises a fan cavity, a pneumatic motor and a bubble blower. A sedimentation chamber and a dust removal chamber are arranged in the fan cavity. An air inlet is arranged on the side of the sedimentation chamber, the air inlet is connected to an air inlet duct, and a dust outlet is arranged on the bottom. An air outlet is arranged on the side of the dust removal chamber, and a sewage outlet is arranged on the bottom. The pneumatic motor is arranged between the sedimentation chamber and the dust removal chamber. The top of the dust removal chamber is connected to the bubble blower, and the bubble blower has a water inlet and an air inlet.

[0005] Preferably, two pneumatic motors are arranged side by side.

[0006] Preferably, two dust outlets are arranged side by side in the sedimentation chamber.

[0007] Preferably, a foam screen plate is provided in the dust removal chamber and is located at the bottom end of the bubble outlet of the bubble blower.

[0008] Preferably, a primary baffle is provided at the top of the sedimentation chamber, the primary baffle faces the air inlet of the sedimentation chamber and is located above the dust outlet on the front side.

[0009] Preferably, the bottom ends of the two dust outlets of the sedimentation chamber are connected to the dust collecting box body.

[0010] Preferably, the air inlet to the two dust outlets of the sedimentation chamber are arranged in a contracted stepped shape.

[0011] Preferably, a secondary baffle is provided between the two dust outlets, the secondary baffle is located at the rear side of the primary baffle, and the airflow through the primary baffle and the secondary baffle forms a V shape.

[0012] Preferably, a water retaining screen plate is provided on the front side of the air outlet of the dust removal chamber.

[0013] The beneficial effects of the present invention are as follows: the pneumatic foam dust removal fan of the tunnel boring machine of the present invention is small and light in overall size, can be directly installed on a two-wheeled carrier, so that it can move with the movement of the tunnel boring machine, and is easy to use; the bubble blower at the top of the dust removal chamber of the fan cavity produces a large number of bubbles, and a large number of bubbles have good viscosity, and the dust and bubbles can adhere quickly, which can cover the dust source and fundamentally prevent the spread of dust. The bubbles use less water and have a high dust removal rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 The present invention is a schematic structural diagram of a pneumatic foam dust removal fan for a tunnel boring machine.

[0016] In the figure: 1. Fan cavity; 2. Pneumatic motor; 3. Bubble blower; 4. Dust collection box; 5. Primary baffle; 6. Secondary baffle; 7. Foam screen plate; 8. Water-retaining screen plate; 11. Sedimentation chamber; 12. Dust removal chamber; 13. Dust outlet; 14. Sewage outlet. Implementation

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example: Figure 1The pneumatic foam dust removal fan of a tunnel boring machine shown in the figure includes a fan cavity 1, a pneumatic motor 2, a bubble blower 3, a dust collecting box 4, a primary baffle 5, a secondary baffle 6, a foam screen plate 7 and a water retaining screen plate 8. A sedimentation chamber 11 and a dust removal chamber 12 are arranged in the fan cavity. An air inlet is arranged on the side of the sedimentation chamber 11, and the air inlet is connected to the air inlet duct. Two adjacent dust outlets 13 are arranged at the bottom. The air inlet of the sedimentation chamber is in a stepped shape from the dust outlet to the dust inlet. An air outlet is arranged on the side of the dust removal chamber 12, and a sewage outlet 14 is arranged at the bottom. Between the sedimentation chamber 11 and the dust removal chamber 12, a gas outlet is arranged. Two pneumatic motors 2 are arranged, and the top of the dust removal chamber 12 is connected to the bubble blower 3. The bubble blower 3 has a water inlet and an air inlet, and the bottom ends of the two dust outlets are connected to the dust collecting box body 4. The top of the sedimentation chamber is opposite to the air inlet and a primary baffle 5 is fixed above the dust outlet on the front side, and a secondary baffle 6 is arranged between the two dust outlets. The secondary baffle 6 is located on the rear side of the primary baffle 5, and the wind flow through the primary baffle 5 and the secondary baffle 6 forms a V shape, and a foam screen plate 7 is arranged in the dust removal chamber 12, which is located at the bottom end of the bubble outlet of the bubble blower, and a water retaining screen plate 8 is arranged on the front side of the air outlet of the dust removal chamber.

[0019] Two pneumatic motors are set to increase the suction force of dust. Two dust outlets are set side by side in the sedimentation chamber. The front dust outlet is located in front of the primary baffle and the secondary baffle, so that the dust that relies on gravity to settle is collected in one dust outlet, which can not only effectively settle dust, but also prevent dust from flying again. The wind flow between the primary baffle and the secondary baffle forms a V shape, which is more conducive to dust reduction. The setting of the dust collection box can collect the dust at the dust outlet to avoid secondary pollution of the environment. The sedimentation chamber and the dust removal chamber in the fan cavity are double dust removal to improve the dust removal efficiency.

[0020] When in use, the compressed air is connected, the two pneumatic motors are started, the pneumatic motors rotate, and the dust enters the sedimentation chamber with the wind flow and passes through the primary baffle for preliminary dust reduction. The dust enters the dust outlet located at the front side, and under the action of the wind flow, it passes through the bottom of the primary baffle and around the top of the secondary baffle, flowing in a V shape for secondary dust reduction. The dust of the secondary dust reduction still enters the dust outlet located at the front side, and the dust partly carried by the wind flow through the secondary baffle settles into the dust outlet located at the rear side, so as to prevent the dust from flying again in the same dust outlet, thereby improving the purification efficiency. The water inlet of the bubble blower is connected to the water source, and the air inlet is connected to the compressed air. The bubble blower generates a large number of bubbles, and a large number of bubbles pass through the foam screen plate in the dust removal chamber and fully contact with the dust in the dust removal chamber, so that the dust particles are captured to form a mud-water mixture, and then discharged through the sewage outlet. When the wind flow in the dust removal chamber passes through the water retaining screen plate, the water droplets in the air adhere to the water retaining screen plate and drip by themselves, and the purified air is discharged.

[0021] The pneumatic foam dust removal fan for the tunnel boring machine of the present invention is small in size and can be directly installed on a two-wheeled carrier. It moves with the movement of the tunnel boring machine and is more convenient to use. The bubbles produced by the bubble blowing machine have good viscosity, and the dust and bubbles can quickly adhere to each other, which can cover the dust source and fundamentally prevent the spread of dust. Moreover, the amount of water used by the bubble blowing machine is at least 50% less than that of the spray mechanism. The pneumatic foam dust removal fan for the tunnel boring machine of the present invention has a simple overall structure, is easy to inspect and repair, and reduces the maintenance rate.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic foam dust removal fan for a tunnel boring machine, characterized in that: It includes a fan cavity, a pneumatic motor and a bubble blower. A sedimentation chamber and a dust removal chamber are arranged in the fan cavity. An air inlet is arranged on the side of the sedimentation chamber, the air inlet is connected to the air inlet duct, and a dust outlet is arranged on the bottom. An air outlet is arranged on the side of the dust removal chamber, and a sewage outlet is arranged on the bottom. The pneumatic motor is arranged between the sedimentation chamber and the dust removal chamber. The top of the dust removal chamber is connected to the bubble blower, and the bubble blower is provided with a water inlet and an air inlet.

2. The pneumatic foam dust removal fan for a tunnel boring machine according to claim 1, characterized in that: The pneumatic motors are arranged in two parallel rows.

3. The pneumatic foam dust removal fan for a tunnel boring machine according to claim 1, characterized in that: Two dust outlets are arranged side by side in the sedimentation chamber.

4. The pneumatic foam dust removal fan for a tunnel boring machine according to claim 1, characterized in that: A foam screen plate is arranged in the dust removal chamber and is located at the bottom end of the bubble outlet of the bubble blower.

5. The pneumatic foam dust removal fan for a tunnel boring machine according to claim 3, characterized in that: A primary baffle is arranged at the top of the sedimentation chamber, the primary baffle faces the air inlet of the sedimentation chamber and is located above the dust outlet on the front side.

6. The pneumatic foam dust removal fan for a tunnel boring machine according to claim 3, characterized in that: The bottom ends of the two dust outlets of the sedimentation chamber are connected to the dust collecting box body.

7. The pneumatic foam dust removal fan for a tunnel boring machine according to claim 3, characterized in that: The air inlet to the two dust outlets of the sedimentation chamber are arranged in a contracted step shape.

8. The pneumatic foam dust removal fan for a tunnel boring machine according to claim 5, characterized in that: A secondary baffle is arranged between the two dust outlets, and the secondary baffle is located at the rear side of the primary baffle, and the wind flow through the primary baffle and the secondary baffle forms a V shape.

9. The pneumatic foam dust removal fan for a tunnel boring machine according to claim 4, characterized in that: A water retaining screen plate is arranged in front of the air outlet of the dust removal chamber.

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