Automatic proportioning device for spraying and dust falling of mining dust cleaning agent

Abstract

An automatic proportioning device for mining dust washing agent spraying and dust falling relates to coal mine drilling and dust removing equipment, comprises a rack, a water inlet and a water outlet, and is characterized in that the water inlet is communicated with a filter through a filter input pipe, a filter output pipe of the filter is divided into two paths, one path is communicated with a clear water outlet, and the other path is mixed with an agent pipeline, passes through a turbulator and then is communicated with a mixed water outlet; the other end of the medicament pipeline is connected with a metering pump, and the metering pump is powered by a motor and connected with a medicament box through a pipeline. The device has the beneficial effects that the device is used for scientifically and reasonably using the dust catching agent, so that the rapid spraying dust falling effect is realized, the underground operation environment is improved, the occupational health hazard is reduced, and the dust safety accident potential is reduced.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machinery technology, and further to coal mine drilling dust suppression equipment, especially an automatic proportioning device for spray dust suppression of coal mine dust removal agents. Background Technology

[0002] Coal mining must ensure safety and efficiency. Among the five major natural hazards in mines, coal dust is the most dangerous. The hazards of coal dust include: 1. Polluting the working environment, reducing visibility, increasing workplace accidents, and lowering project quality. 2. Harming miners' health. Long-term inhalation of fine coal dust particles can cause organ damage, ranging from respiratory inflammation, chronic poisoning, and skin diseases to pneumoconiosis, a serious occupational disease among miners. 3. Under certain concentrations, underground coal dust can explode, causing casualties, damaging equipment, and destroying the entire mine. 4. Coal dust accelerates the damage to mechanical and electrical equipment, shortens the lifespan of precision instruments and meters, and reduces their detection accuracy.

[0003] The higher the dispersion of coal dust, the greater its hazard. In dry coal seams, coal dust flies everywhere during drilling, creating a smoky and polluted working environment. Currently, water is commonly used for dust suppression. However, research and practice have shown that due to the hydrophobic nature of coal dust, the high surface tension of water, and its rapid evaporation rate, hydrophobic coal dust is not easily wetted and captured by water, making water-based dust suppression less than ideal. The maximum dust suppression rate with water is around 60%, but for respirable dust, it only reaches 28%. This is due to two main reasons: first, the surface hydrophobicity of coal dust and rock dust particles, combined with the high surface tension of water, makes it difficult to wet the dust particles; second, because dust particles are very small and lightweight, they are stable in suspension and do not easily settle.

[0004] Dust suppressant is an environmentally friendly, high-efficiency liquid dust suppressant additive developed specifically for the unique properties of coal mine dust. It is primarily used in various dust suppression sprays. Its multiple functional components work synergistically to rapidly and efficiently wet, capture, adsorb, and settle coal dust, resulting in a significant dust suppression effect. Adding a small amount during various spray dust suppression processes in underground fully mechanized mining and tunneling faces can reduce the electrostatic repulsion between water mist and dust, rapidly wetting the particle surface, allowing water mist and dust to quickly adsorb and combine, accelerating gravity settling, and thus rapidly improving the dust suppression efficiency of clean water. Under good spray conditions, the dust suppression rate can reach over 90%. Because it can persistently moisten the coal seam, it maintains good coal body moisture retention even after mining, reducing the concentration of coal dust in the mining environment. It significantly improves the environment of underground workplaces, reduces the risk of dust accidents, and minimizes occupational health hazards. It can greatly reduce the incidence of silicosis among workers, reducing the investment in worker medical care in coal mines, and is of great significance to the construction of harmonious mines.

[0005] The use and implementation of dust-reducing agents require equipment. The applicant has developed an automatic mixing device for spraying dust-reducing agents in mines. This device has an automatic mixing function for dust-reducing agents and can achieve rapid dust reduction. Utility Model Content

[0006] The purpose of this invention is to provide an automatic proportioning device for spray dust suppression in mining, which can achieve rapid dust suppression.

[0007] The objective of this utility model is achieved through the following solution:

[0008] An automatic mixing device for dust suppression spraying in mining includes a frame, an inlet, and an outlet. The inlet is connected to a filter via a filter input pipe. The filter output pipe is divided into two paths: one leads to a clean water outlet, and the other mixes with the agent pipeline, passes through a turbulence generator, and then leads to a mixed water outlet. The other end of the agent pipeline is connected to a metering pump, which is powered by a motor and connected to a drug tank via a pipeline.

[0009] further:

[0010] A pressure reducing valve is installed at the water inlet, and the output pipe of the pressure reducing valve is connected to the filter and the buffer respectively through a three-way A.

[0011] An electric ball valve A is installed at the clear water outlet, and an electric ball valve B is installed at the mixed water outlet.

[0012] The electric ball valves A and B are controlled by the controller.

[0013] A flow sensor B and a pressure sensor are installed in front of the turbulence generator.

[0014] The buffer is equipped with a flow sensor A.

[0015] The medicine box is equipped with a liquid level sensor.

[0016] The filter is provided with a filter drain port at the bottom, and the medicine box is provided with a medicine drain port at the bottom.

[0017] The beneficial effects of this invention are: the device uses dust-reducing agents scientifically and rationally to achieve rapid dust suppression through spraying, improve the underground working environment, reduce occupational health hazards, and lower the risk of dust-related safety accidents.

[0018] To enable those skilled in the art to better understand the present invention and to make the above-mentioned objectives, features and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to embodiments. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of this utility model.

[0020] Figure 1 In the diagram: 1 is the frame, 2 is the water inlet, 3 is the pressure reducing valve, 4 is the buffer pipe, 5 is the pressure sensor, 6 is the chemical pipeline, 7 is the tee C, 8 is the flow sensor A, 9 is the buffer, 10 is the filter, 11 is the filter output pipe, 12 is the tee B, 13 is the level sensor, 14 is the electric ball valve A, 15 is the clean water outlet, 16 is the electric ball valve B, 17 is the mixing outlet, 18 is the chemical drain outlet, 19 is the clean water pipe, 20 is the flow sensor B, 21 is the turbulence generator, 22 is the chemical tank, 23 is the motor, 24 is the tee D, 25 is the filter drain outlet, 26 is the filter input pipe, 27 is the metering pump, and 28 is the tee A. Detailed Implementation

[0021] like Figure 1 As shown, the automatic proportioning device for dust suppression spraying in mining includes a frame 1, an inlet 2, and an outlet. The inlet 2 is connected to a pressure reducing valve 3. The pressure reducing valve 3 is connected to a filter input pipe 26 and a buffer pipe 4 via a tee A28. The filter input pipe 26 is connected to a filter 10. A filter output pipe 11 is installed on the filter 10. A tee B12 connected in series on the filter output pipe 11 is connected to a clean water pipe 19. The clean water pipe 19 is connected to a clean water outlet 15. An electric ball valve A14 is installed on the clean water pipe 19 for opening and closing the clean water outlet 15.

[0022] The filter output pipe 11 is connected to the tee C7, which is connected to the medicine pipe 6. The other end of the medicine pipe 6 is connected to the metering pump 27. The metering pump 27 is powered by the motor 23. The metering pump 27 is connected to the medicine box 22 through the pipe, thereby discharging the medicine from the medicine box 22.

[0023] The end of the filter output pipe 11 is provided with a three-way valve D24, which is connected to the pressure sensor 5 and the turbulent flow device 21 respectively. The turbulent flow device 21 is provided with an electric ball valve B16, which is used to open and close the mixing outlet 17.

[0024] The buffer pipe 4 is connected to the buffer 9, which is used to eliminate water hammer. The buffer 9 is equipped with a flow sensor A8 to monitor the flow rate of the water passing through.

[0025] The medicine tank 22 is equipped with a liquid level sensor 13, which is used to display the height of the liquid level inside the medicine tank 22.

[0026] The filter 10 is provided with a filter drain port 25 at the bottom for discharging the debris deposited in the filter 10.

[0027] The bottom of the medicine box 22 is provided with a medicine drain port 18 for discharging the debris that settles in the medicine box 22.

[0028] A flow sensor B20 is installed on the filter output pipe 11 between the three-way valve B12 and the three-way valve C7 to display the flow rate of clean water passing between the three-way valve B12 and the three-way valve C7.

[0029] Filter 10 (precision filter) is made of 316 stainless steel sintered wire mesh, which is easy to clean and rust-free. This product features high flow rate, high precision, strong dirt holding capacity, low pressure loss, convenient installation, simple operation, high reliability, and strong corrosion resistance. It is suitable for working fluids of different water media.

[0030] The metering pump 27 automatically or manually adjusts the pulse count of the mixing pump to control the flow rate of the dust-washing agent by calculating the water flow rate and the required mixing ratio parameters. This ensures accurate mixing of the system.

[0031] In the turbulence mixer 21, when water flows past the damping plate in the static mixer, the turbulence intensifies, forming vortices of various sizes, thus breaking the laminar flow state. Accompanied by the strong pulsation of the vortices, the reagent and water diffuse, mix, and are transported in all directions, accumulating under the action of strong vortices. The reagent is broken into small droplets and uniformly dispersed in the water. Thus, all parts of the fluid are thoroughly mixed.

[0032] Pressure sensor 5, flow sensor A8, level sensor 13, electric ball valve A14, electric ball valve B16, flow sensor B20, and metering pump 27 are electrically connected to the control device.

[0033] The control device refers to a PLC control system with an industrial interface, which enables fully automatic operation of the system under unattended conditions. The system uses an online touchscreen display and, through configuration software, displays parameters such as solution concentration, solution volume, and equipment operating time. It also features data storage and uploading capabilities. The system includes an RS485 interface for expanded remote monitoring and operation functions.

[0034] The centralized control device is a specialized control unit for dust agent proportioning, integrating sensor technology, programmable logic controller (PLC) technology, and industrial control display. The PLC is the central control component of the system. Through internally preset programs, it can control the overall electrical performance of the unit. The PLC receives signals such as motor temperature, liquid level, and pressure, processes them, and transmits the results to relevant actuators to achieve automatic control.

[0035] The device has three main modes: 1. Dust mode: activates when the dust concentration reaches a specified mg level (range 1-100mg); 2. Time mode: activates and stops within a set time period; 3. Timer mode: activates and stops for a specified duration. The mode status can be viewed on the touchscreen under "Current Mode". Specific settings are configured using the four buttons.

[0036] Valve status: Red indicates active, Green indicates off;

[0037] Pump status: Red indicates active, green indicates stopped.

[0038] Automatic mode; if this mode is activated, it will be disabled if another mode is activated while it is running. You can view the current mode on the main interface.

[0039] The cleaning agent is a commercially available product, formulated with a unique water-based surfactant and a solvent containing a mixture of various components. Specifications include: specific gravity of 1.01 g / ml, pH value of 7.0-7.5, and adjustable concentration of 0.1-1%.

[0040] Through the control device, this utility model can also achieve the following: 1. Automatic dust-washing agent mixing function. When the dust concentration reaches the set value, the equipment starts to automatically mix the solution and sprays it. When the dust reduction reaches 90% or more, the equipment automatically stops. 2. Monitoring and displaying the dust-washing agent level and operating water pressure. 3. Manually controlling the metering pump to start the solution mixing by measuring the solution concentration. 4. Real-time data display, data analysis, concentration control, and equipment start / stop functions. 5. Human-machine interface, simultaneously displaying relevant information such as the control process and operating status.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A mine dust washing agent spray dust reduction automatic proportioning device, comprising a rack, a water inlet, and a water outlet, characterized in that: The water inlet is connected with the filter through a filtering input pipe, the filtering output pipe of the filter is divided into two ways, one way leads to the clean water outlet, and the other way is mixed with the medicament pipeline and then leads to the mixed water outlet through a turbulent flow device; the other end of the medicament pipeline is connected with a metering pump, the metering pump is powered by a motor, and the metering pump is connected with a medicine box through a pipeline.

2. The automatic proportioning device for dust washing agent spraying and dust setting of mine according to claim 1, characterized in that: A pressure reducing valve is arranged at the water inlet, and the output pipe of the pressure reducing valve is connected with the filter and the buffer through a three-way pipe A.

3. The automatic proportioning device for dust washing agent spraying and dust setting of mine according to claim 1, characterized in that: An electric ball valve A is arranged at the clean water outlet, and an electric ball valve B is arranged at the mixed water outlet.

4. The automatic proportioning device for dust washing agent spraying dust-settling of mine according to claim 3, characterized in that: The electric ball valve A and the electric ball valve B are controlled by a controller.

5. The automatic proportioning device for dust washing agent spraying and dust setting of mine according to claim 1, characterized in that: A flow sensor B and a pressure sensor are arranged in front of the turbulent flow device.

6. The automatic proportioning device for dust washing agent spraying and dust setting of mine according to claim 2, characterized in that: A flow sensor A is arranged on the buffer.

7. The automatic proportioning device for dust washing agent spraying and dust setting of mine according to claim 1, characterized in that: A liquid level sensor is arranged on the medicine box.

8. The automatic proportioning device for dust washing agent spraying and dust setting of mine according to claim 1, characterized in that: A filter blowdown outlet is arranged at the bottom of the filter, and a medicament blowdown outlet is arranged at the bottom of the medicine box.

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