Mining Laval wind and water nozzle

Abstract

The utility model discloses a mining Laval wind and water nozzle, and belongs to the technical field of mining dust falling equipment. Comprising a spray head body, the spray head body is sequentially provided with a narrowing channel, a mixing channel and an acceleration channel from right to left, a circle of water passing groove is formed in the outer side circumferential face, located at the position of the mixing channel, of the spray head body, and a pair of oppositely-arranged water inlet channels are communicated between the water passing groove and the mixing channel; a blocking edge for sealing the water passing groove is fixed to the position, at the water passing groove, of the spray head body, a water inlet pipe is communicated with the blocking edge, and an air inlet pipe is communicated with the end, at the narrowing channel, of the spray head body. The spray head has the advantages that the spray head body utilizes the Laval effect to accelerate air to blow away water to form long-distance and large-range water mist, and the dust falling distance and effect are improved; compared with a Laval nozzle which is directly connected with a water source, the device adopts a structure of combining the air inlet joint and the water inlet joint, so that the water consumption can be effectively reduced, and the water resource is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine dust suppression equipment, and particularly relates to a Laval wind water sprinkler head for mines. Background Art

[0002] Coal mining is accompanied by a large amount of dust, and dust concentration is a parameter that must be strictly controlled in mines. Coal dust is generated during excavation, loading, transportation, and unloading. This dust not only affects workers' health and reduces their visibility, but can also cause explosions when dust concentration reaches a critical value. Therefore, dust suppression devices are essential equipment in mines. Current dust suppression devices generally use wind-water nozzles to generate atomized water vapor for spraying. Wind-water nozzles primarily spray air and water by mixing them at the nozzle. The spray range and distance depend on the pressure of the gas. Because wind-water nozzles are generally used by multiple nozzles connected to a single air source, the dispersed gas pressure is very low. Maximum spraying effect is generally achieved only when suspended from a top-down position. Even if wind-water nozzles are directly connected to a compressed air source, they cannot spray over long distances due to the nozzle's inherent structure. The industry also directly uses Laval nozzles for dust suppression. The Laval principle is widely used in daily life. When a gas or liquid passes through a channel that narrows and then enters a channel that widens, its flow rate accelerates, thereby achieving the goal of high-speed injection with low pressure. Laval nozzles are usually directly connected to a water source and use the Laval effect to accelerate the water spray, forming a long-distance, large-scale water mist. This type of nozzle is commonly used in firefighting. However, due to the direct connection to the water source, it has the problem of high water consumption. In mining environments, the dust suppression device needs to be continuously activated, or even always on, resulting in a large amount of accumulated water and waste of water resources.

[0003] In view of the above situation, it is necessary to design a mine Laval wind water sprinkler with simple structure, low cost, ability to reduce water consumption and achieve long-distance and large-scale dust reduction. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced in this context. Utility Model Content

[0004] The purpose of the utility model is to provide a Laval wind water nozzle for mining, which helps to improve the nozzle structure so that the gas can be accelerated through the Laval principle to spray and disperse the water body to form a long-distance, large-scale water mist to improve the dust reduction distance and effect, which is conducive to reducing water consumption and saving water resources.

[0005] The purpose of the utility model is achieved in this way. A Laval wind water nozzle for mining includes a nozzle body, and the nozzle body is provided with a narrowing channel, a mixing channel and an acceleration channel in sequence from right to left. The nozzle body is provided with a circle of water grooves on the outer circumferential surface at the position of the mixing channel. A pair of oppositely arranged water inlet channels are connected between the water grooves and the mixing channel. The nozzle body is fixed with a rib that closes the water groove at the position of the water groove, and a water inlet pipe is connected to the rib. The nozzle body is connected with an air inlet pipe at one end of the narrowing channel.

[0006] In a specific embodiment of the present invention, a water inlet joint is installed at the end of the water inlet pipe.

[0007] In another specific embodiment of the present invention, an air intake connector is installed at the end of the air intake pipe.

[0008] In another specific embodiment of the present invention, the narrowing channel, the mixing channel and the accelerating channel are interconnected so that the interior of the nozzle body is formed into a left-right through structure.

[0009] In another specific embodiment of the present invention, the diameter of the narrowing channel gradually decreases from right to left, the diameter of the mixing channel remains unchanged, one end of the mixing channel is connected to the end with the smallest diameter of the narrowing channel, the diameter of the acceleration channel gradually increases from right to left, and the other end of the mixing channel is connected to the end with the smallest diameter of the acceleration channel.

[0010] In another specific embodiment of the present invention, the width of the retaining edge is greater than the width of the water channel and completely covers the water channel and is fixedly connected to the nozzle body.

[0011] After adopting the above structure, the utility model has the beneficial effects: since the nozzle body utilizes the Laval effect to accelerate the gas to blow away the water body to form a long-distance and large-scale water mist, the dust reduction distance and effect are greatly improved; at the same time, the device adopts a structure that combines the air inlet joint and the water inlet joint, compared with the Laval nozzle directly connected to the water source, it can effectively reduce water consumption, thereby saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a cross-sectional view of the planar structure of an embodiment of the present utility model;

[0013] In the figure: 1. nozzle body, 11. narrowing channel, 12. mixing channel, 13. acceleration channel, 14. water trough, 15. water inlet channel, 16. retaining wall, 17. water inlet pipe, 18. air inlet pipe; 2. water inlet connector; 3. air inlet connector. DETAILED DESCRIPTION

[0014] The specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments does not limit the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as within the scope of protection of the present invention.

[0015] In the following description, all concepts related to directionality or orientation, such as up, down, left, right, front and back, are based on Figure 1 The positions shown are for reference only and should not be understood as a special limitation on the technical solution provided by the present invention.

[0016] See also Figure 1 The present utility model relates to a Laval wind-water sprinkler for mining, comprising a sprinkler body 1. The sprinkler body 1 is provided with a narrowing channel 11, a mixing channel 12, and an accelerating channel 13, sequentially arranged from right to left. A water groove 14 is provided on the outer circumferential surface of the sprinkler body 1 at the location of the mixing channel 12. A pair of oppositely disposed water inlet channels 15 are connected between the water groove 14 and the mixing channel 12. A retaining edge 16 is fixed to the sprinkler body 1 at the location of the water groove 14, sealing the water groove 14. A water inlet pipe 17 is connected to the retaining edge 16. An air inlet pipe 18 is connected to one end of the narrowing channel 11 of the sprinkler body 1. The narrowing channel 11, mixing channel 12, and accelerating channel 13 are interconnected, forming a left-right through-structure within the sprinkler body 1.

[0017] Furthermore, a water inlet connector 2 is installed at the end of the water inlet pipe 17 ; and an air inlet connector 3 is installed at the end of the air inlet pipe 18 .

[0018] Furthermore, the diameter of the aforementioned narrowing channel 11 gradually decreases from right to left, the diameter of the mixing channel 12 remains unchanged, one end of the mixing channel 12 is connected to the end with the smallest diameter of the narrowing channel 11, and the diameter of the acceleration channel 13 gradually increases from right to left, and the other end of the mixing channel 12 is connected to the end with the smallest diameter of the acceleration channel 13.

[0019] The width of the aforementioned retaining edge 16 is greater than the width of the water channel 14 and completely covers the water channel 14 and is fixedly connected to the nozzle body 1. In this embodiment, the aforementioned fixed connection is preferably fixed by welding.

[0020] Please continue reading Figure 1When in use, first connect the nozzle to the water source and the air source through the aforementioned water inlet joint 2 and the air inlet joint 3 respectively, then fix the nozzle at the position where dust reduction is required, and make one end of the acceleration channel 13 of the aforementioned nozzle body 1 face the dust reduction area, then turn on the water source and the air source, and the water flows into the water inlet pipe 17 through the aforementioned water inlet joint 2 and fills the water groove 14. The water in the aforementioned water groove 14 enters the mixing channel 12 through the water inlet channel 15. At the same time, the gas enters the narrow channel 11 through the air inlet joint 3. When the gas passes through the narrow channel 11 from right to left, it is continuously compressed by the narrow channel 11 and flows into the mixing channel 12. The gas blows out the water in the mixing channel 12 together and enters the acceleration channel 13. When the gas passes through the acceleration channel 13 from right to left, the gas accelerates as the diameter of the acceleration channel 13 continues to increase until it is ejected from the nozzle body 1 (the acceleration principle is the Laval effect). The water is blown into water mist by the gas, and the water mist forms a long-distance and large-scale dust reduction water mist as the gas is ejected.

Claims

1. A Laval fengshui nozzle for mining, characterized by: The invention comprises a nozzle body (1), wherein the nozzle body (1) is provided with a narrow channel (11), a mixing channel (12) and an acceleration channel (13) in sequence from right to left, the nozzle body (1) is provided with a circle of water grooves (14) on the outer circumferential surface at the position of the mixing channel (12), a pair of oppositely arranged water inlet channels (15) are connected between the water grooves (14) and the mixing channel (12), the nozzle body (1) is fixed with a retaining edge (16) at the position of the water grooves (14) for closing the water grooves (14), the retaining edge (16) is connected with a water inlet pipe (17), and the nozzle body (1) is connected with an air inlet pipe (18) at one end of the narrow channel (11).

2. A Laval wind-water nozzle for mining according to claim 1, characterized in that: A water inlet joint (2) is installed at the end of the water inlet pipe (17).

3. The Laval wind-water nozzle for mining according to claim 1, characterized in that: An air intake connector (3) is installed at the end of the air intake pipe (18).

4. The Laval wind-water nozzle for mining according to claim 1, characterized in that: The narrowing channel (11), the mixing channel (12) and the accelerating channel (13) are interconnected, so that the interior of the nozzle body (1) is formed into a left-right penetrating structure.

5. The Laval wind-water nozzle for mining according to claim 1, characterized in that: The diameter of the narrowing channel (11) gradually decreases from right to left, the diameter of the mixing channel (12) remains unchanged, one end of the mixing channel (12) is connected to the end of the narrowing channel (11) with the smallest diameter, the diameter of the acceleration channel (13) gradually increases from right to left, and the other end of the mixing channel (12) is connected to the end of the acceleration channel (13) with the smallest diameter.

6. The Laval wind-water nozzle for mining according to claim 1, characterized in that: The width of the retaining edge (16) is greater than the width of the water channel (14) and completely covers the water channel (14) before being fixedly connected to the nozzle body (1).

Images