Dustproof spraying device for coal mine tunneling

Abstract

The utility model provides a dustproof spraying device for coal mine tunneling, which comprises a rack, a water tank, a fan cavity, an air guide pipe, a water pump, a nozzle, a vertical nozzle and a horizontal air guide pipe, fog drops extend longitudinally and transversely in two directions by means of fan airflow, and the contact range of the fog drops and dust is enlarged. Air flow generated by the fan forms stable high-speed air flow through the air guide pipe with the flow guide plate, the stable high-speed air flow intersects with water flow, shearing force is applied, large particles are crushed into finer fog drops, and fine dust can be captured easily. The water tank and the fan cavity operate independently and cooperate with each other, vertical spraying is matched with horizontal airflow, a working face is fully covered, and dust falling dead corners do not exist. And fourthly, the spraying environment is stabilized, the fan continuously operates, underground complex airflow interference is weakened, stable spraying pressure and flow are maintained, and the stable and efficient dust falling effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mine dustproof spraying device technical field especially relates to a coal mine dustproof spraying device for tunneling. BACKGROUND

[0002] The coal mine tunneling process can produce a large amount of coal dust, and the miners are exposed to high concentration of coal dust for a long time, which is easy to inhale fine dust particles and cause respiratory diseases such as pneumoconiosis. The dustproof spraying device can reduce the number of inhalable dust by spraying dust, and protect the health of the miners. Coal dust is flammable, and when the concentration of coal dust in the air reaches a certain concentration, it will cause a violent explosion once it meets a fire source, causing disastrous consequences. The spraying device continuously sprays to reduce the concentration of coal dust, so that it is maintained below the lower limit of explosion, which is the key line of defense to prevent coal dust explosion.

[0003] Some existing spraying devices produce large droplet particles, which are difficult to fully contact and adsorb fine coal dust, resulting in low dust reduction efficiency. Large droplets settle quickly and stay in the air for a short time, and fall to the ground before they can capture coal dust, so they cannot inhibit fine dust suspended in the air. SUMMARY

[0004] Therefore, the utility model wants to solve the technical problem: how to provide a coal mine dustproof spraying device for tunneling to improve the spraying performance of the spraying device.

[0005] To achieve the above purpose, the utility model provides a coal mine dustproof spraying device for tunneling, which comprises a rack, a water tank, a fan cavity, a wind guide pipe, a water pump and a nozzle.

[0006] The water tank and the fan cavity are fixedly arranged on the rack, and the water tank and the fan cavity are arranged side by side. The water pump is fixedly arranged on the rack.

[0007] The water tank is used to contain water, the input end of the water pump is connected with the water tank, and the output end of the water pump is connected with the nozzle. The water flow in the water tank is pressurized and delivered to the nozzle by the water pump and sprayed outward.

[0008] The fan cavity and the water tank are independently arranged, the fan is arranged in the fan cavity, the side of the fan cavity is provided with an air inlet, the top of the fan cavity is provided with an air outlet and connected with the wind guide pipe, and the air flow is guided and delivered from the air inlet to the wind guide pipe and discharged outward by the operation of the fan.

[0009] The nozzle is arranged in the vertical direction, the port of the wind guide pipe is arranged in the horizontal direction, and the port of the wind guide pipe is located above the nozzle.

[0010] A plurality of guide plates are arranged in the air duct, and the guide plates are used for guiding the airflow delivered by the fan to be emitted in a horizontal direction.

[0011] Further, the guide plates at least include a first guide plate and a second guide plate, the first guide plate is located above the second guide plate, and a length of a horizontal segment of the first guide plate in the horizontal direction is greater than a length of a horizontal segment of the second guide plate in the horizontal direction.

[0012] Further, the water pump is connected to the rack through the fixing table.

[0013] Further, the input end of the water pump is connected to the water tank through a pipeline.

[0014] Compared with the related art, the dust-proof spraying device for coal mine tunneling has the following beneficial effects:

[0015] (1) The nozzle is arranged in a vertical direction, and the port of the air duct is arranged above the nozzle and in a horizontal direction. The pressurized water flow emitted from the nozzle is in a vertical direction, and the horizontal airflow delivered by the fan generates a transverse pushing force on the vertically upward mist droplets, so that the diffusion range of the mist droplets is expanded in both the horizontal and vertical dimensions. Compared with natural spraying relying on the nozzle alone, the mist droplets can more evenly cover the entire tunneling operation surface, greatly improving the contact probability with dust particles and thereby enhancing the dust reduction effect.

[0016] (2) The fan operates to generate airflow in the fan cavity, which is discharged through the air duct. When the airflow passes through the air duct provided with the plurality of guide plates, a stable and uniform horizontal airflow is formed. When the airflow intersects with the water flow emitted from the nozzle, the high-speed airflow applies additional shear force to the water flow, so that the large-particle water flow is further broken into finer mist droplets, improving the atomization effect. The finer mist droplets are more easily suspended in the air, prolonging the contact time with dust, capturing more fine dust, and improving the dust removal efficiency.

[0017] (3) Since the water tank and the fan cavity are independently arranged side by side, the water pump is responsible for water supply and spraying, and the fan is responsible for delivering airflow to assist in spraying and dust reduction, and the two work together. The vertical spraying and the horizontal airflow cooperate to build a three-dimensional dust reduction system in the tunneling working area. Whether it is dust near the ground or dust suspended in the air, it can be captured and settled by the mist droplets, making up for the short board of the traditional spraying device that only reduces dust from a single direction and has a limited coverage range, and reducing the dust concentration of the tunneling operation surface in all directions.

[0018] (4) The continuous operation of the fan can disturb the air flow state of the tunneling face to a certain extent, reduce the interference of unstable air pressure and wind speed caused by the complex underground environment on the spraying, and help to maintain stable spraying pressure and flow, ensure uniform droplet size, and continuously and efficiently carry out dust removal work, thereby avoiding the fluctuation of dust removal effect caused by unstable spraying. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a structure schematic view of the dustproof spraying device for coal mine tunneling in the embodiment of the utility model.

[0020] Fig. 2 It is a partial enlarged view of the dustproof spraying device for coal mine tunneling at the air guide pipe in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] The utility model will be further described in detail in combination with the drawings and specific embodiments.

[0022] Please see Figs. 1-2 The utility model discloses a dustproof spraying device for coal mine tunneling, which comprises a rack 11, a water tank 12, a fan cavity 13, an air guide pipe 14, a water pump 15 and a nozzle 16.

[0023] The water tank 12 and the fan cavity 13 are fixedly arranged on the rack 11, and the water tank 12 and the fan cavity 13 are arranged side by side.

[0024] The fan in the fan cavity 13 generates airflow during operation, which is discharged through the air guide pipe 14. When the airflow passes through the air guide pipe 14 provided with a plurality of guide plates, stable and uniform horizontal airflow is formed. When the airflow intersects with the water flow sprayed by the nozzle 16, the high-speed airflow applies additional shear force to the water flow, so that the large-particle water flow is further broken into finer droplets, and the atomization effect is improved. The finer droplets are more easily suspended in the air, prolong the contact time with dust, can capture more fine dust, and improve the dust removal efficiency.

[0025] The water tank 12 is used for containing water, the input end of the water pump 15 is connected with the water tank 12, the water pump 15 is connected to the rack 11 through a fixing table, and the input end of the water pump 15 is connected with the water tank 12 through a pipeline. The output end of the water pump 15 is connected with the nozzle 16, and the water pump 15 pressurizes and transports the water flow in the water tank 12 to the nozzle 16 and sprays outward.

[0026] The fan cavity 13 and the water tank 12 are independently arranged, the fan is arranged in the fan cavity 13, the side of the fan cavity 13 is provided with an air inlet, the top of the fan cavity 13 is provided with an air outlet and is connected with the air guide pipe 14, and the airflow is guided and transported from the air inlet to the air guide pipe 14 and discharged outward by the operation of the fan.

[0027] The nozzle 16 is arranged in a vertical direction, the port of the air duct 14 is arranged in a horizontal direction, and the port of the air duct 14 is located above the nozzle 16. The nozzle 16 is arranged in a vertical direction, and the port of the air duct 14 is located above the nozzle 16 and arranged in a horizontal direction. The pressurized water flow sprayed from the nozzle 16 is in a vertical direction, and the horizontal air flow delivered by the fan generates a transverse pushing force on the vertically upward mist droplets, so that the diffusion range of the mist droplets is expanded in both horizontal and vertical dimensions. Compared with natural spraying relying on the nozzle 16 alone, the mist droplets can be more evenly distributed throughout the tunneling operation surface, greatly improving the contact probability with dust particles and thereby enhancing the dust suppression effect.

[0028] Since the water tank 12 and the fan cavity 13 are independently arranged side by side, the water pump 15 is responsible for water supply and spraying, and the fan is responsible for delivering air flow to assist in spraying and dust suppression, and the two work together. The vertical spraying and the horizontal air flow cooperate to build a three-dimensional dust suppression system in the tunneling working area. Whether it is dust near the ground or dust suspended in the air, it can be captured and settled by the mist droplets, making up for the shortcoming of the traditional spraying device that only suppresses dust from a single direction and has a limited coverage range, and reducing the dust concentration of the tunneling operation surface in all directions.

[0029] The continuous operation of the fan can disturb the local air flow state of the tunneling surface to a certain extent, reducing the disturbance of unstable air pressure and wind speed caused by the complex underground environment on the spraying. Stable spraying environment helps to maintain stable spraying pressure and flow, ensure uniform mist droplet size, and continuously and efficiently carry out dust removal work, avoiding fluctuations in dust suppression effect caused by unstable spraying.

[0030] The air duct 14 is provided with a plurality of guide plates for guiding the air flow delivered by the fan to be emitted in a horizontal direction.

[0031] Further, the guide plates at least include a first guide plate 141 and a second guide plate 142, the first guide plate 141 is located above the second guide plate 142, and the length of the horizontal section of the first guide plate 141 in the horizontal direction is greater than the length of the horizontal section of the second guide plate 142 in the horizontal direction.

[0032] In the air duct 14, the air flow speed delivered by the fan is fast and relatively turbulent, and by setting multiple layers of guide plates, the air flow can be gradually combed to be stable and uniform. The first guide plate 141 is located above the second guide plate 142, and the length of the horizontal section of the first guide plate 141 in the horizontal direction is greater than that of the second guide plate 142. In this way, when the high-speed air flow enters the air duct 14, it first contacts the longer first guide plate 141, which blocks and guides a large area, preliminarily reduces the air flow speed and regulates the flow direction, and allows the air flow to preliminarily move smoothly in the horizontal direction. Then, the preliminarily regulated air flow encounters the second guide plate 142, which is shorter and plays a fine tuning and fine correction role, further optimizing the air flow state so that it is ejected at a stable flow rate and precise horizontal direction.

[0033] This is beneficial to precise intersection with vertically sprayed mist droplets, allowing the air flow to more efficiently apply shear force to the mist droplets, helping to refine the mist droplets and strengthen the spray dust removal effect.

[0034] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A dust-preventing spraying device for coal mine tunneling, characterized by, It includes a frame, a water tank, a fan cavity, a wind guide pipe, a water pump and a nozzle. The water tank and the fan cavity are fixedly arranged on the frame, and the water tank and the fan cavity are arranged side by side. The water tank is used for containing water, the input end of the water pump is connected with the water tank, the output end of the water pump is connected with the nozzle, and the water in the water tank is pressurized and delivered to the nozzle by the water pump and sprayed outwards. The fan cavity and the water tank are independently arranged, a fan is arranged in the fan cavity, an air inlet is arranged on the side of the fan cavity, the top of the fan cavity is an air outlet and is connected with the wind guide pipe, and the fan is operated to guide and deliver the airflow from the air inlet to the wind guide pipe and discharge it outwards. The nozzle is arranged in a vertical direction, the port of the wind guide pipe is arranged in a horizontal direction, and the port of the wind guide pipe is located above the nozzle. A plurality of guide plates are arranged in the wind guide pipe, and the guide plates are used for guiding the airflow delivered by the fan to be sprayed outwards in a horizontal direction.

2. The dust spray device for coal mine tunneling according to claim 1, characterized in that, The guide plates at least include a first guide plate and a second guide plate, the first guide plate is located above the second guide plate, and the length of the horizontal segment of the first guide plate in the horizontal direction is greater than the length of the horizontal segment of the second guide plate in the horizontal direction.

3. The dust spray device for coal mine tunneling according to claim 2, characterized in that, The water pump is connected to the frame through a fixing table.

4. The dust spray device for coal mine tunneling according to claim 3, characterized in that, The input end of the water pump and the water tank are connected through a pipeline.

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