Mine differential pressure power gas-liquid mixing device

Abstract

This utility model discloses a pressure differential dynamic gas-liquid mixing device for mining, relating to the field of coal mine dust removal technology. It solves the problems of traditional dosing devices requiring additional pumps for reagent delivery, poor reagent mixing efficiency, and inconvenient maintenance. The device comprises a transverse pipe connected to one end of a longitudinal pipe via a tee, with the other end of the longitudinal pipe connected to the inside of a reagent storage tank. The transverse pipe is also connected to one end of an oblique pipe via a tee, with the other end of the oblique pipe connected to a vertical pipe, the other end of which is located below the reagent level. The oblique tee is located downstream of the tee. A first valve is installed on the transverse pipe, positioned between the tee and the oblique tee. This utility model relies on pressure differential to deliver the reagent, eliminating the need for an additional pump. The device achieves efficient mixing of the reagent and gas through three-valve coordinated control and optimized fluid dynamics of the mixing chamber. It features a simple and stable structure, and the modular valve design supports quick disassembly and replacement, facilitating maintenance.

Description

Technical Field

[0001] This utility model relates to the field of coal mine dust removal technology, specifically a mine differential pressure dynamic gas-liquid mixing device. Background Technology

[0002] During underground coal mine operations, dust (such as PM2.5 and PM10) generated by coal mining machines, tunneling machines, and transportation equipment can lead to occupational diseases such as pneumoconiosis and bronchitis in workers with long-term inhalation. Furthermore, when the concentration of coal dust in the air reaches 45-2000 g / m³ and an ignition source is present, there is also a risk of explosion. Many dust particles have highly hydrophobic surfaces or are extremely small, making them difficult to capture by water mist. Adding wetting agents and coagulants can significantly improve dust removal efficiency.

[0003] Traditional dosing devices often use a single valve to control the flow rate of the liquid dust suppressant, which has the following problems: the agent needs to be pumped separately, the amount of liquid dust added cannot be dynamically matched with the air pressure, the gas-liquid mixing is insufficient, and the atomization dust suppression efficiency is low. For example, Chinese patent CN221442646U discloses a liquid dust suppressant quantitative dosing device. Although it optimizes the mixing process through nozzles and a stirring mechanism, it still has limitations: the flow control relies on a single structure, which only uses the nozzle jet to create negative pressure to extract the liquid dust, resulting in a limited amount of liquid dust added. It also lacks a dynamic feedback mechanism and cannot adapt to changes in air pressure. The nozzle is prone to clogging: the stirring mechanism is located inside the converging section of the nozzle. In high dust and high humidity environments, impurities easily accumulate between the blades and the nozzle due to agent residue or coal dust adhesion, leading to blockage. Furthermore, the rotating parts require lubrication or sealing, and improper maintenance can easily cause them to jam, requiring regular manual cleaning. Utility Model Content

[0004] To address the problems mentioned above regarding the need for additional pumps, poor mixing efficiency, and inconvenient maintenance in traditional dosing devices, this invention proposes a mine-use differential pressure dynamic gas-liquid mixing device. This invention relies on differential pressure to deliver the liquid, eliminating the need for an additional pump. Through three-valve coordinated control and optimized fluid dynamics of the mixing chamber, the device achieves highly efficient mixing of the liquid and gas. It features a simple and stable structure, and the modular valve design supports quick disassembly and replacement, facilitating maintenance.

[0005] This utility model proposes a mine-use differential pressure dynamic gas-liquid mixing device, specifically including a liquid storage cylinder and a gas-liquid mixing structure. The gas-liquid mixing structure is disposed on the liquid storage cylinder. The gas-liquid mixing structure includes a horizontal pipe, a vertical pipe, an oblique pipe, and a vertical pipe. The horizontal pipe, the vertical pipe, and the oblique pipe are disposed on the upper surface of the liquid storage cylinder, and the vertical pipe is disposed inside the liquid storage cylinder. The horizontal pipe is connected to one end of the vertical pipe through a tee, and the other end of the vertical pipe is connected to the inside of the liquid storage cylinder. The horizontal pipe is connected to one end of the oblique pipe through an oblique tee, and the other end of the oblique pipe is connected to the vertical pipe. The other end of the vertical pipe is located below the liquid surface. The oblique tee is located downstream of the tee. A first valve is disposed on the horizontal pipe, and the first valve is disposed between the tee and the oblique tee.

[0006] Furthermore, a second valve is installed on the inclined pipe.

[0007] Furthermore, the medicine storage cylinder is equipped with a funnel, and the funnel is equipped with a third valve.

[0008] Furthermore, the angle between the horizontal pipe and the oblique pipe is 45 degrees.

[0009] Furthermore, the oblique tee is provided with a contraction cavity, the inlet of which is connected to the oblique pipe and the outlet of which is connected to the transverse pipe; the contraction cavity is a conical cavity.

[0010] Furthermore, the inlet diameter of the contraction chamber is three times the outlet diameter.

[0011] Furthermore, the medicine storage cylinder is equipped with an observation window.

[0012] The beneficial effects of the mine differential pressure dynamic gas-liquid mixing device described in this utility model are as follows:

[0013] (1) The gas-liquid mixing device for mining under differential pressure described in this utility model comprehensively improves the pain points of traditional dosing devices, such as low adjustment accuracy, uneven mixing, easy clogging and high maintenance cost, through multi-valve coordinated control, fluid dynamics optimized mixing chamber, anti-clogging material and structural design and modular maintenance scheme. It provides an efficient, reliable and economical solution for coal mine dust control and has significant industry promotion value.

[0014] (2) The mining differential pressure dynamic gas-liquid mixing device described in this utility model uses gas to press the liquid out of the liquid storage cylinder, and at the same time, it uses three valves to control the flow rate of the liquid to dynamically match the dust concentration; the conical structure of the shrinkage cavity increases the flow speed of the liquid, thereby strengthening the mixing effect of the liquid and air, making the liquid atomized evenly and improving the dust suppression efficiency.

[0015] (3) The mining differential pressure dynamic gas-liquid mixing device described in this utility model has a simple and stable structure, and the modular valve design supports quick disassembly and replacement, which facilitates maintenance and reduces downtime. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the structure of a mine differential pressure dynamic gas-liquid mixing device according to the present invention;

[0019] Figure 2 This is a cross-sectional view of the contraction chamber of a mine differential pressure dynamic gas-liquid mixing device according to the present invention;

[0020] Figure 3 This utility model describes a mine-use differential pressure dynamic gas-liquid mixing device. Figure 2 A magnified view of a section at point A in the middle;

[0021] Figure 4 This utility model describes a mine-use differential pressure dynamic gas-liquid mixing device. Figure 2 Cross-sectional view at point BB;

[0022] Among them: 1-Medicine storage cylinder, 2-Observation window, 3-First valve, 4-Second valve, 5-Third valve, 6-Function funnel, 7-Straight tee, 8-Oblique tee, 9-Horizontal pipe, 10-Longitudinal pipe, 11-90-degree elbow of longitudinal pipe, 12-Oblique pipe, 13-90-degree elbow of oblique pipe, 14-Vertical pipe, 15-Contraction chamber. Detailed Implementation

[0023] The technical solution of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of, and not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Specific implementation method one: See Figures 1-4This embodiment is described in detail. The mine-use differential pressure dynamic gas-liquid mixing device described in this embodiment specifically includes a liquid storage cylinder 1 and a gas-liquid mixing structure. The gas-liquid mixing structure is disposed on the liquid storage cylinder 1. The gas-liquid mixing structure includes a horizontal pipe 9, a vertical pipe 10, an inclined pipe 12, and a vertical pipe 14. The horizontal pipe 9, the vertical pipe 10, and the inclined pipe 12 are disposed on the upper surface of the liquid storage cylinder 1, and the vertical pipe 14 is disposed inside the liquid storage cylinder 1. The inlet end of the horizontal pipe 9 is connected to a compressed air source. The horizontal pipe 9 is connected to one end of the vertical pipe 10 through a tee 7, and the other end of the vertical pipe 10 is connected to the gas space inside the liquid storage cylinder 1 through a 90-degree bend 11. The horizontal pipe 9 is connected to one end of the inclined pipe 12 through an inclined tee 8, and the included angle between the horizontal pipe 9 and the inclined pipe 12 is [missing information]. 45 degrees; the other end of the inclined pipe 12 is connected to the vertical pipe 14 through the inclined pipe 90-degree bend 13; the other end of the vertical pipe 14 is located below the liquid surface of the medicine, and the distance between it and the bottom of the medicine storage cylinder 1 is 10mm to avoid the intake of sediment impurities; the inclined tee 8 is located downstream of the straight tee 7; a first valve 3 is installed on the horizontal pipe 9, and the first valve 3 is located between the straight tee 7 and the inclined tee 8. By adjusting the opening of the first valve 3, the input amount of compressed air is adjusted, so that the compressed air is divided into two paths: one path enters the medicine storage cylinder 1 through the vertical pipe 10 to provide positive pressure to push the medicine out, thereby driving the medicine through the vertical pipe 14 into the inclined pipe 12 to reach the position of the inclined tee 8; the other path directly reaches the position of the inclined tee 8 through the horizontal pipe 9 to mix with the medicine and then discharge.

[0028] The inclined pipe 12 is equipped with a second valve 4, and the flow rate of the medicine is adjusted by adjusting the opening of the second valve 4.

[0029] The medicine storage cylinder 1 is equipped with a funnel 6, and a third valve 5 is installed on the funnel 6. When the amount of medicine in the medicine storage cylinder 1 is insufficient, the first valve 3 and the second valve 4 are closed, and the third valve 5 is opened to quickly replenish the medicine storage cylinder 1 through the funnel 6. The third valve 5 adopts a quick-release ball valve design, which supports disassembly and replacement within 5 minutes.

[0030] The oblique tee 8 is provided with a contraction cavity 15. The inlet of the contraction cavity 15 is connected to the oblique pipe 12, and the outlet is connected to the transverse pipe 9. The contraction cavity 15 is a tapered cavity structure with a gradually narrowing cross section. The ratio of the inlet diameter to the outlet diameter (contraction ratio) is 3:1. The inner wall of the contraction cavity 15 is mirror polished or coated with PTFE to reduce flow resistance and particle deposition.

[0031] The medicine storage cylinder 1 is equipped with an observation window 2. The observation window 2 is made of borosilicate glass with a thickness of 12mm and is installed to the medicine storage cylinder 1 via a flange sealing connection. The flange is made of 316L stainless steel and is acid-washed and passivated after welding to the cylinder body. The sealing gasket is made of fluororubber with a pressure resistance of 2.5MPa. If cost is a constraint, a coated polycarbonate observation window can be selected, which is fixed by a press-fit sealing structure, shortening the maintenance cycle to once every 3 months.

[0032] The specific usage method of the mine differential pressure dynamic gas-liquid mixing device described in this utility model is explained as follows:

[0033] Start-up preparation: Open the third valve 5 and add the medicine solution into the medicine storage cylinder 1 through the funnel 6. After adding, close the third valve 5.

[0034] Differential pressure drive: Open the first valve 3 and the second valve 4, and the compressed air is divided into two paths through the horizontal pipe 9. One path goes through the first valve 3 to the discharge outlet of the mixture of medicine and air; the other path goes through the vertical pipe 10 and the vertical pipe 90-degree bend 11 to enter the medicine storage tank 1, driving the medicine to rise through the vertical pipe 14, and through the inclined pipe 90-degree bend 13 to enter the inclined pipe 12, pass through the second valve 4 to reach the inclined tee 8 and enter the horizontal pipe 9 to mix with the compressed air.

[0035] Flow rate adjustment: Based on the feedback from the dust sensor, adjust the opening of the first valve 3 to control the compressed air delivery speed, and adjust the opening of the second valve 4 to control the liquid flow rate (adjustable from 0.5 to 5 L / min).

[0036] High-efficiency mixing: After the liquid medicine and air are mixed in a turbulent flow inside the horizontal pipe 9, they are sprayed out at the outlet of the horizontal pipe 9 to form a dust suppression fog screen;

[0037] Quick maintenance: Disassembling the modular valves (first valve 3, second valve 4, third valve 5) only requires loosening the flange bolts, and replacement can be completed within 5 minutes.

[0038] In summary, the mine-use differential pressure dynamic gas-liquid mixing device of this invention, through multi-valve coordinated control, fluid dynamics-optimized mixing chamber, anti-clogging material and structural design, and modular maintenance scheme, comprehensively improves the pain points of traditional dosing devices, such as low adjustment accuracy, uneven mixing, easy clogging, and high maintenance costs. It provides an efficient, reliable, and economical solution for coal mine dust control, and has significant industry promotion value. The mine-use differential pressure dynamic gas-liquid mixing device of this invention uses gas to force liquid out of the liquid storage cylinder 1, while three valves work together to dynamically adapt the liquid flow rate to the dust concentration. The conical contraction chamber 15 increases the liquid flow velocity, thereby enhancing the mixing effect between the liquid and air, resulting in uniform liquid atomization and improved dust suppression efficiency. The mine-use differential pressure dynamic gas-liquid mixing device of this invention has a simple and stable structure, and the modular valve design supports quick disassembly and replacement, facilitating maintenance and reducing downtime.

[0039] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the utility model. They can also be reasonable combinations of the features described in the above embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mine-use differential pressure dynamic gas-liquid mixing device, characterized in that: The system includes a liquid storage cylinder (1) and a gas-liquid mixing structure, which is mounted on the liquid storage cylinder (1). The gas-liquid mixing structure includes a horizontal pipe (9), a vertical pipe (10), an oblique pipe (12), and a vertical pipe (14). The horizontal pipe (9), the vertical pipe (10), and the oblique pipe (12) are mounted on the upper surface of the liquid storage cylinder (1), and the vertical pipe (14) is mounted inside the liquid storage cylinder (1). The horizontal pipe (9) is connected to the vertical pipe (10) via a tee (7) and the vertical pipe (10). One end of the longitudinal pipe (10) is connected to the inside of the medicine storage cylinder (1); the transverse pipe (9) is connected to one end of the oblique pipe (12) through the oblique tee (8), and the other end of the oblique pipe (12) is connected to the vertical pipe (14), and the other end of the vertical pipe (14) is located below the liquid surface of the medicine; the oblique tee (8) is located downstream of the straight tee (7); a first valve (3) is set on the transverse pipe (9), and the first valve (3) is set between the straight tee (7) and the oblique tee (8).

2. The mine differential pressure dynamic gas-liquid mixing device according to claim 1, characterized in that: A second valve (4) is installed on the inclined pipe (12).

3. The mine differential pressure dynamic gas-liquid mixing device according to claim 1, characterized in that: The medicine storage cylinder (1) is equipped with a funnel (6), and a third valve (5) is installed on the funnel (6).

4. The mine differential pressure dynamic gas-liquid mixing device according to claim 1, characterized in that: The angle between the horizontal pipe (9) and the oblique pipe (12) is 45 degrees.

5. The mine differential pressure dynamic gas-liquid mixing device according to claim 1, characterized in that: The oblique tee (8) is provided with a contraction cavity (15), the inlet of the contraction cavity (15) is connected to the oblique pipe (12), and the outlet is connected to the transverse pipe (9); the contraction cavity (15) is a conical cavity.

6. The mine differential pressure dynamic gas-liquid mixing device according to claim 5, characterized in that: The inlet diameter of the contraction chamber (15) is three times the outlet diameter.

7. The mine differential pressure dynamic gas-liquid mixing device according to claim 1, characterized in that: The medicine storage cylinder (1) is provided with an observation window (2).

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