Air jet flow dust removal type concrete spraying unit

Abstract

The utility model discloses an air jet dedusting type shotcrete unit, and relates to the technical field of shotcrete dedusting, a shotcrete is fixedly connected in a box body, the top end of the box body is provided with a box cover, a feed port of the shotcrete penetrates through the box cover, the outer side of the box body is provided with a screw conveyer, and the screw conveyer is provided with a screw. A dust cover is connected between a discharging port of the spiral conveyor and a feeding port of the concrete spraying machine, and one side of the box body is connected with a dust removal device. The dust removal device 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 the diameter of the negative pressure pipe. According to the air jet flow dust removal type concrete spraying unit, dust diffusion can be avoided, meanwhile, dust can be cleaned in time, the dust removal structure is simple, and the occupied space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal of concrete spraying machines, in particular to an air jet dust removal type concrete spraying machine unit. Background Art

[0002] The working principle of dry concrete spraying machine is to mix cement and aggregate in a certain proportion, and then blow them to the nozzle through compressed air, and then spray them out after mixing with the pressurized water from the pressure water tank. This construction method is simple and fast, but the dust is large when the aggregate is mixed, and the dust needs to be handled in time to avoid environmental pollution.

[0003] During the operation of the dry concrete spraying machine, a certain amount of stored material needs to be maintained in its hopper to ensure uniform and continuous feeding. However, because it is in a continuous rotating state, a large amount of dust will be generated when filling it. At the same time, because 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 an air jet dust removal concrete spraying unit to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model aims to provide an air jet dust removal concrete spraying machine unit to solve the problem that there is much dust and dust removal is inconvenient when the dry concrete spraying machine is running in the above background technology.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented by the following technical solutions: an air jet dust removal type concrete spraying unit, the concrete spraying machine is fixedly connected to the inside of a box body, a box cover is provided on the top of the box body, a feed port of the concrete spraying machine penetrates the box cover, a screw conveyor is provided on the outside of the box body, a dust cover is connected between the discharge port of the screw conveyor and the feed port of the concrete spraying machine, and a dust removal device is connected to one side of the box body;

[0009] The dust removal device includes an air intake pipe, a negative pressure pipe, a throat pipe, a mixing pipe and an exhaust pipe which are connected in sequence through a conical transition pipe. The diameters of the negative pressure pipe and the mixing pipe are both larger than the diameter of the negative pressure pipe. A gas nozzle and an atomizing nozzle are fixedly connected in sequence to the inner side of the negative pressure pipe along the airflow direction. The gas nozzle and the atomizing nozzle are both facing the throat pipe.

[0010] Preferably, the feed port of the screw conveyor is connected to a feed hopper.

[0011] Preferably, an elastic sealing ring is provided between the box cover and the concrete spraying machine, and the elastic sealing ring is fixedly connected to the box cover.

[0012] Preferably, an air supply pipe and a liquid supply pipe are fixedly penetrated on the side wall of the negative pressure pipe, the gas nozzle is connected to the air supply pipe, and the atomizing nozzle is connected to the liquid supply pipe.

[0013] 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.

[0014] 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.

[0015] Preferably, the exhaust pipe is an L-shaped pipe, and the end of the exhaust pipe away from the mixing pipe faces downward.

[0016] Preferably, a fan blade is fixedly connected to the interior of the mixing tube.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides an air jet dust removal type concrete spraying unit, which has the following beneficial effects:

[0019] 1. The air jet dust removal concrete spraying unit feeds the concrete spraying machine through a screw conveyor, and the concrete spraying machine is set in a box body, so that the generated dust is confined in the box body and the dust cover. At the same time, the dust removal device is used for negative pressure dust removal, which can clean the dust, reduce dust diffusion, and reduce air pollution.

[0020] 2. The air jet dust removal concrete spraying unit is equipped with a gas nozzle and an atomizing nozzle in a negative pressure pipe, which absorbs dust through negative pressure and sprays water through the atomizing nozzle. The atomized water droplets absorb dust and are discharged with the air flow, thereby achieving a dust removal effect. The structure is simple and occupies little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a three-dimensional schematic diagram of the dust removal device of the utility model;

[0023] Figure 3 It is a cross-sectional schematic diagram of the dust removal device of the utility model;

[0024] Figure 4It is a three-dimensional schematic diagram of the fan blade of the utility model.

[0025] In the figure: 1. concrete spraying machine; 2. box body; 4. dust removal device; 5. screw conveyor; 6. feeding funnel; 7. frame; 8. dust cover; 11. box cover; 12. buckle lock; 21. air inlet pipe; 22. negative pressure pipe; 23. throat pipe; 24. mixing pipe; 25. exhaust pipe; 26. air supply pipe; 27. liquid supply pipe; 28. tapered transition pipe; 29. ​​gas nozzle; 30. atomizing nozzle; 31. spray hole; 32. fan blade. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-4 As shown, an air jet dust removal concrete spraying unit comprises a concrete spraying machine 1, which is fixedly connected to the inside of a box body 2, a box cover 11 is provided at the top of the box body 2, a feed port of the concrete spraying machine 1 passes through the box cover 11, a screw conveyor 5 is provided on the outside of the box body 2, a dust cover 8 is connected between the discharge port of the screw conveyor 5 and the feed port of the concrete spraying machine 1, and a dust removal device 4 is connected to one side of the box body 2;

[0028] The dust removal device 4 includes an air intake pipe 21, a negative pressure pipe 22, a throat pipe 23, a mixing pipe 24 and an exhaust pipe 25 which are connected in sequence through a conical transition pipe 28. The diameters of the negative pressure pipe 22 and the mixing pipe 24 are both larger than the diameter of the negative pressure pipe 22. A gas nozzle 29 and an atomizing nozzle 30 are fixedly connected in sequence to the inner side of the negative pressure pipe 22 along the airflow direction. The gas nozzle 29 and the atomizing nozzle 30 are both facing the throat pipe 23.

[0029] The concrete raw material is lifted to the concrete spraying machine 1 by the screw conveyor 5. During its operation, the dust generated by it is confined in the box body 2 and the dust cover 8. The gas is sent to the throat 23 through the gas nozzle 29. When the airflow enters the throat 23 through the negative pressure pipe 22, the gas flow rate increases. The increase in the airflow rate causes the air pressure in the negative pressure pipe 22 to decrease and form a negative pressure. The dust in the box body 2 and the dust cover 8 follows the airflow from the air inlet pipe 21 to the negative pressure pipe 22. Water is sprayed into the negative pressure pipe 22 through the atomizing nozzle 30. The airflow diffuses in the mixing pipe 24, reducing the flow rate and increasing the airflow retention time, so that the atomized water droplets absorb the dust and are discharged from the exhaust pipe 25 following the airflow.

[0030] In order to facilitate feeding into the screw conveyor 5 , a feeding hopper 6 is connected to the feeding port of the screw conveyor 5 .

[0031] An elastic sealing ring fixedly connected to the box cover 11 is provided between the box cover 11 and the feed port of the concrete spraying machine 1 to prevent dust from escaping.

[0032] Specifically, an air supply pipe 26 and a liquid supply pipe 27 are fixedly passed through the side wall of the negative pressure pipe 22 . The air supply pipe 26 is used to supply air to the gas nozzle 29 , and the liquid supply pipe 27 is used to supply liquid to the atomizing nozzle 30 .

[0033] Specifically, the air intake pipe 21, the negative pressure pipe 22, the throat pipe 23 and the mixing pipe 24 are all straight pipes, and the axis lines of the air intake pipe 21, the negative pressure pipe 22, the throat pipe 23 and the mixing pipe 24 are collinear. By adopting straight pipes, it is avoided that the pipe bends affect the gas flow rate, resulting in a decrease in the negative pressure at the air intake end of the air intake pipe 21.

[0034] Specifically, the diameter of the air inlet pipe 21 is smaller than the diameter of the negative pressure pipe 22. By reducing the pipe diameter, the gas flow rate in the air inlet pipe 21 is increased, thereby improving the dust collection effect.

[0035] In some embodiments, the diameter of the gas nozzle 29 is larger than the diameter of the atomizing nozzle 30, and a plurality of spray holes 31 are provided on the side of the gas nozzle 29 facing the atomizing nozzle 30, and the positions of the spray holes 31 are offset from the liquid supply pipe 27 and the atomizing nozzle 30. By dislocating the spray holes 31 of the gas nozzle 29 from the liquid supply pipe 27 and the atomizing nozzle 30, the atomizing nozzle 30 is prevented from blocking the airflow. Preferably, the gas nozzle 29 and the atomizing nozzle 30 are both arranged at the axis of the negative pressure pipe 22.

[0036] In some embodiments, in order to facilitate the disassembly and assembly of each pipeline, the intake pipe 21, the throat pipe 23 and the exhaust pipe 25 are all welded to the small end face of the tapered transition pipe 28, and the negative pressure pipe 22 and the mixing pipe 24 are fixedly connected to the large end face of the tapered transition pipe 28 by bolts.

[0037] In some embodiments, the exhaust pipe 25 is an L-shaped pipe, and the end of the exhaust pipe 25 away from the mixing pipe 24 faces downward. By adopting the L-shaped pipe, when the water droplets carrying dust pass through the bend, the probability of collision between the water droplets and the wall of the exhaust pipe 25 is increased, so that the water droplets are gathered. In addition, the exhaust pipe 25 can be connected to the gas-liquid separator through the gas pipeline to perform gas-liquid separation.

[0038] In some embodiments, in order to allow the water mist to fully absorb the dust, a fan blade 32 is fixedly connected to the inside of the mixing tube 24. When the airflow passes through the fan blade 32, the airflow is disturbed by the action of the fan blade 32, the airflow velocity is reduced, the retention time of the water mist and dust in the mixing tube 24 is increased, and the dust absorption effect is improved.

[0039] In order to facilitate movement, the concrete spraying machine 1 , the box body 2 and the screw conveyor 5 are all fixedly connected to the frame 7 .

[0040] Working principle: When in use, the concrete raw material is sent to the screw conveyor 5 through the feeding funnel 6, and the screw conveyor 5 lifts the concrete raw material and sends it to the concrete spraying machine 1. During its operation, the dust generated is confined in the box body 2 and the dust cover 8. The air inlet pipe 21 is connected to the dust removal chamber, and air is supplied to the gas nozzle 29 through the air supply pipe 26. Water is supplied to the atomizing nozzle 30 through the liquid supply pipe 27. When the air flow enters the throat 23 through the negative pressure pipe 22, the gas flow rate increases. The increase in the air flow rate causes the air pressure formed in the negative pressure pipe 22 to decrease and form a negative pressure. The dust-laden air enters the negative pressure pipe 22 from the air inlet pipe 21, and water is sprayed into the negative pressure pipe 22 through the atomizing nozzle 30. The atomized water droplets absorb dust and are discharged with the air flow, thereby achieving a dust removal effect.

[0041] 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. An air jet dust removal concrete spraying unit, comprising a concrete spraying machine (1), characterized in that: The concrete spraying machine (1) is fixedly connected to the inside of the box body (2); a box cover (11) is provided at the top of the box body (2); a feed port of the concrete spraying machine (1) passes through the box cover (11); a screw conveyor (5) is provided on the outside of the box body (2); a dust cover (8) is connected between the discharge port of the screw conveyor (5) and the feed port of the concrete spraying machine (1); and a dust removal device (4) is connected to one side of the box body (2); The dust removal device (4) comprises an air intake pipe (21), a negative pressure pipe (22), a throat pipe (23), a mixing pipe (24), and an exhaust pipe (25) which are connected in sequence via a tapered transition pipe (28); the diameters of the negative pressure pipe (22) and the mixing pipe (24) are both larger than the diameter of the negative pressure pipe (22); a gas nozzle (29) and an atomizing nozzle (30) are fixedly connected in sequence to the inner side of the negative pressure pipe (22) along the airflow direction; the gas nozzle (29) and the atomizing nozzle (30) are both facing the throat pipe (23).

2. The air jet dust removal concrete spraying unit according to claim 1, characterized in that: The feed port of the screw conveyor (5) is connected to a feed hopper (6).

3. The air jet dust removal concrete spraying unit according to claim 1, characterized in that: An elastic sealing ring is provided between the box cover (11) and the feed port of the concrete spraying machine (1), and the elastic sealing ring is fixedly connected to the box cover (11).

4. The air jet dust removal concrete spraying unit according to claim 1, characterized in that: An air supply pipe (26) and a liquid supply pipe (27) are fixedly passed through the side wall of the negative pressure pipe (22); the gas nozzle (29) is connected to the air supply pipe (26); and the atomizing nozzle (30) is connected to the liquid supply pipe (27).

5. The air jet dust removal concrete spraying unit according to claim 1, characterized in that: The diameter of the gas nozzle (29) is greater than the diameter of the atomizing nozzle (30); a plurality of spray holes (31) are provided on a side of the gas nozzle (29) facing the atomizing nozzle (30); and the positions of the spray holes (31) are offset from the liquid supply pipe (27) and the atomizing nozzle (30).

6. The air jet dust removal concrete spraying unit according to claim 1, characterized in that: The air inlet pipe (21), the throat pipe (23) and the exhaust pipe (25) are all welded to the small end face of the tapered transition pipe (28), and the negative pressure pipe (22) and the mixing pipe (24) are fixedly connected to the large end face of the tapered transition pipe (28) by means of bolts.

7. The air jet dust removal concrete spraying unit according to claim 1, characterized in that: The exhaust pipe (25) is an L-shaped pipe, and the end of the exhaust pipe (25) away from the mixing pipe (24) faces downward.

8. The air jet dust removal concrete spraying unit according to claim 1, characterized in that: A fan blade (32) is fixedly connected to the interior of the mixing tube (24).

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