Air jet dust removal device for concrete

Abstract

The utility model discloses a concrete air jet dust removal device, which relates to the technical field of concrete dust removal and comprises an air inlet pipe, a negative pressure pipe, a throat pipe, a mixing pipe and an exhaust pipe which are sequentially connected through a conical transition pipe, and the diameter of the negative pressure pipe and the diameter of the mixing pipe are both larger than that of the negative pressure pipe; the inner side of the negative pressure pipe is fixedly connected with a gas spray head and an atomizing spray head in sequence in the airflow direction, the gas spray head and the atomizing spray head both face the throat pipe, a gas supply pipe and a liquid supply pipe are fixed to the side wall of the negative pressure pipe in a penetrating mode, the gas spray head is connected with the gas supply pipe, and the atomizing spray head is connected with the liquid supply pipe. The concrete air jet dust removal device is simple in structure, small in size and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete dust removal, in particular to a concrete air jet dust removal device. Background Art

[0002] A concrete spraying machine is a mechanical device that uses compressed air to form a suspended airflow of concrete in a certain proportion and sprays it onto the surface to form a dense concrete layer.

[0003] During the operation of this mechanical equipment, concrete dust will be generated, causing environmental pollution. Since the equipment needs to move continuously with the construction location, traditional dust removal equipment, such as electrostatic dust collectors, bag dust collectors, and cyclone dust collectors, are more complex in structure and larger in size, making it inconvenient to move with the concrete spraying machine and more inconvenient to use.

[0004] Therefore, it is necessary to propose a concrete air jet dust removal device to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model aims to provide a concrete air jet dust removal device which has a simple structure, small size and is easy to use, so as to solve the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented by the following technical solutions: a concrete air jet dust removal device, comprising an air inlet pipe, a negative pressure pipe, a throat pipe, a mixing pipe and an exhaust pipe connected in sequence through a conical transition pipe, wherein the diameters of the negative pressure pipe and the mixing pipe are both larger than the diameter of the negative pressure pipe;

[0009] A gas nozzle and an atomizing nozzle are fixedly connected to the inner side of the negative pressure pipe in sequence along the airflow direction, and both the gas nozzle and the atomizing nozzle are facing the throat. An air supply pipe and a liquid supply pipe are fixedly passed through the side wall of the negative pressure pipe, and the gas nozzle is connected to the air supply pipe, and the atomizing nozzle is connected to the liquid supply pipe.

[0010] Preferably, the air inlet pipe, negative pressure pipe, throat pipe and mixing pipe are all straight pipes, and the axis lines of the air inlet pipe, negative pressure pipe, throat pipe and mixing pipe are collinear.

[0011] Preferably, the diameter of the air inlet pipe is smaller than the diameter of the negative pressure pipe.

[0012] Preferably, the diameter of the gas nozzle is larger than that of the atomizing nozzle, and a plurality of spray holes are provided on a side of the gas nozzle facing the atomizing nozzle, and the positions of the spray holes are offset from the liquid supply pipe and the atomizing nozzle.

[0013] Preferably, the air inlet pipe, the throat pipe and the exhaust pipe are all welded to the small end face of the tapered transition pipe, and the negative pressure pipe and the mixing pipe are fixedly connected to the large end face of the tapered transition pipe by bolts.

[0014] Preferably, the exhaust pipe is an L-shaped pipe, and the end of the exhaust pipe away from the mixing pipe faces downward.

[0015] Preferably, a fan blade is fixedly connected to the interior of the mixing tube.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a concrete air jet dust removal device, which has the following beneficial effects:

[0018] The concrete air jet dust removal device is provided with a gas nozzle and an atomizing nozzle in a negative pressure pipe, and the gas nozzle is used as a power source to supply air so as to generate negative pressure dust in the negative pressure pipe. The mixing pipe is provided so that the atomized water droplets can fully absorb the dust, thereby achieving the dust removal effect. The device has a simple structure, a small size, and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a cross-sectional schematic diagram of the structure of the utility model;

[0021] Figure 3 It is a three-dimensional schematic diagram of the fan blade of the utility model.

[0022] In the figure: 1. air intake pipe; 2. negative pressure pipe; 3. throat; 4. mixing pipe; 5. exhaust pipe; 6. air supply pipe; 7. liquid supply pipe; 8. tapered transition pipe; 9. gas nozzle; 10. atomizing nozzle; 11. spray hole; 12. fan blade. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figure 1-3As shown, a concrete air jet dust removal device includes an air inlet pipe 1, a negative pressure pipe 2, a throat pipe 3, a mixing pipe 4 and an exhaust pipe 5 which are sequentially connected through a conical transition pipe 8, the diameters of the negative pressure pipe 2 and the mixing pipe 4 are both larger than the diameter of the negative pressure pipe 2; a gas nozzle 9 and an atomizing nozzle 10 are sequentially fixedly connected to the inner side of the negative pressure pipe 2 along the air flow direction, the gas nozzle 9 and the atomizing nozzle 10 are both facing the throat pipe 3, an air supply pipe 6 and a liquid supply pipe 7 are fixedly penetrated on the side wall of the negative pressure pipe 2, the gas nozzle 9 is connected to the air supply pipe 6, and the atomizing nozzle 10 is connected to the liquid supply pipe 7.

[0025] The negative pressure pipe 2 and the mixing pipe 4 are connected through a throat pipe 3 with a smaller diameter, and air is sent to the throat pipe 3 through a gas nozzle 9. When the airflow enters the throat pipe 3 through the negative pressure pipe 2, the cross-section decreases and the gas flow rate increases. The increase in the air flow rate causes the air pressure in the negative pressure pipe 2 to decrease and form a negative pressure. The dust-laden air enters the negative pressure pipe 2 from the air inlet pipe 1, and water is sprayed into the negative pressure pipe 2 through an atomizing nozzle 10. The airflow diffuses in the mixing pipe 4, reducing the flow rate and increasing the airflow retention time, so that the atomized water droplets absorb dust and are discharged from the exhaust pipe 5 along with the airflow.

[0026] Specifically, the air intake pipe 1, the negative pressure pipe 2, the throat pipe 3 and the mixing pipe 4 are all straight pipes, and the axis lines of the air intake pipe 1, the negative pressure pipe 2, the throat pipe 3 and the mixing pipe 4 are collinear. By adopting straight pipes, it is avoided that the pipe bending affects the gas flow rate, resulting in a decrease in the negative pressure at the air intake end of the air intake pipe 1.

[0027] Specifically, the diameter of the air intake pipe 1 is smaller than the diameter of the negative pressure pipe 2. By reducing the pipe diameter, the gas flow rate in the air intake pipe 1 is increased, thereby improving the dust collection effect.

[0028] In some embodiments, the diameter of the gas nozzle 9 is larger than the diameter of the atomizing nozzle 10, and a plurality of spray holes 11 are provided on the side of the gas nozzle 9 facing the atomizing nozzle 10, and the positions of the spray holes 11 are offset from the liquid supply pipe 7 and the atomizing nozzle 10. By dislocating the spray holes 11 of the gas nozzle 9 from the liquid supply pipe 7 and the atomizing nozzle 10, the atomizing nozzle 10 is prevented from blocking the airflow. Preferably, the gas nozzle 9 and the atomizing nozzle 10 are both arranged at the axis of the negative pressure pipe 2.

[0029] In some embodiments, in order to facilitate the disassembly and assembly of each pipeline, the intake pipe 1, the throat pipe 3 and the exhaust pipe 5 are all welded to the small end face of the tapered transition pipe 8, and the negative pressure pipe 2 and the mixing pipe 4 are fixedly connected to the large end face of the tapered transition pipe 8 by bolts.

[0030] In some embodiments, the exhaust pipe 5 is an L-shaped pipe, and the end of the exhaust pipe 5 away from the mixing pipe 4 faces downward. By adopting the L-shaped pipe, when the water droplets carrying dust pass through the bend, the probability of collision with the wall of the exhaust pipe 5 is increased, and the water droplets are collected.

[0031] In addition, the exhaust pipe 5 can be connected to the gas-liquid separator through a gas transmission pipeline to perform gas-liquid separation.

[0032] In some embodiments, in order to allow the water mist to fully absorb the dust, a fan blade 12 is fixedly connected to the inside of the mixing tube 4. When the airflow passes through the fan blade 12, the airflow is disturbed by the action of the fan blade 12, the airflow velocity is reduced, the retention time of the water mist and dust in the mixing tube 4 is increased, and the dust adsorption effect is improved.

[0033] Working principle: When in use, connect the air inlet pipe 1 to the dust box chamber to be removed, supply air to the gas nozzle 9 through the air supply pipe 6, supply water to the atomizing nozzle 10 through the liquid supply pipe 7, and the gas flow rate increases when the air flow enters the throat pipe 3 through the negative pressure pipe 2. The increase in air flow rate causes the air pressure in the negative pressure pipe 2 to decrease and form a negative pressure. The dust-laden air enters the negative pressure pipe 2 from the air inlet pipe 1, and water is sprayed into the negative pressure pipe 2 through the atomizing nozzle 10. The atomized water droplets and dust follow the air flow into the mixing pipe 4, where the air flow diffuses and slows down. The water mist in the mixing pipe 4 absorbs the dust and is discharged through the exhaust pipe 5 following the air flow, thereby achieving a dust removal effect.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete air jet dust removal device, characterized in that: It comprises an intake pipe (1), a negative pressure pipe (2), a throat pipe (3), a mixing pipe (4) and an exhaust pipe (5) which are connected in sequence via a tapered transition pipe (8), wherein the diameters of the negative pressure pipe (2) and the mixing pipe (4) are both larger than the diameter of the negative pressure pipe (2); A gas nozzle (9) and an atomizing nozzle (10) are fixedly connected in sequence to the inner side of the negative pressure pipe (2) along the airflow direction, and the gas nozzle (9) and the atomizing nozzle (10) are both facing the throat pipe (3). An air supply pipe (6) and a liquid supply pipe (7) are fixedly passed through the side wall of the negative pressure pipe (2), and the gas nozzle (9) is connected to the air supply pipe (6), and the atomizing nozzle (10) is connected to the liquid supply pipe (7).

2. A concrete air jet dust removal device according to claim 1, characterized in that: The air intake pipe (1), the negative pressure pipe (2), the throat pipe (3) and the mixing pipe (4) are all straight pipes, and the axis lines of the air intake pipe (1), the negative pressure pipe (2), the throat pipe (3) and the mixing pipe (4) are collinear.

3. The concrete air jet dust removal device according to claim 1, characterized in that: The diameter of the air intake pipe (1) is smaller than the diameter of the negative pressure pipe (2).

4. The concrete air jet dust removal device according to claim 1, characterized in that: The diameter of the gas nozzle (9) is greater than the diameter of the atomizing nozzle (10); a plurality of spray holes (11) are provided on a side of the gas nozzle (9) facing the atomizing nozzle (10); and the positions of the spray holes (11) are offset from the liquid supply pipe (7) and the atomizing nozzle (10).

5. The concrete air jet dust removal device according to claim 1, characterized in that: The air intake pipe (1), the throat pipe (3) and the exhaust pipe (5) are all welded to the small end face of the tapered transition pipe (8), and the negative pressure pipe (2) and the mixing pipe (4) are both fixedly connected to the large end face of the tapered transition pipe (8) by means of bolts.

6. The concrete air jet dust removal device according to claim 1, characterized in that: The exhaust pipe (5) is an L-shaped pipe, and the end of the exhaust pipe (5) away from the mixing pipe (4) faces downward.

7. The concrete air jet dust removal device according to claim 1, characterized in that: A fan blade (12) is fixedly connected to the interior of the mixing tube (4).

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