Underground spraying device

Abstract

The utility model provides an underground spraying device which comprises a spraying pipeline, a water supply pipeline, a cleaning water tank, a reverse cleaning pipeline, a nozzle and a PLC (programmable logic controller), the nozzle is connected with the water supply pipeline through the spraying pipeline, a first filter element is arranged at a water outlet of the water supply pipeline, and a first stop valve and a second stop valve are respectively arranged on the upstream and the downstream of the first filter element. The cleaning water tank is connected with the downstream of the first filter element through a reverse cleaning pipeline, an electric heater and a thermometer are arranged on the two sides in the cleaning water tank respectively, a reverse cleaning valve is arranged on the reverse cleaning pipeline, a first blow-down valve is connected between the first stop valve and the first filter element, the input end of the PLC is electrically connected with the thermometer, and the output end of the PLC is connected with the first stop valve and the second stop valve respectively. And the second stop valve, the backwashing valve, the first blow-down valve and the electric heater switch are electrically connected. According to the underground spraying device, the filter element is automatically cleaned, the operation is simple and convenient, the cleaning efficiency is improved, the spraying area is larger, and the atomization effect is better.

Description

Technical Field

[0001] This utility model belongs to the field of underground dust removal technology, and in particular relates to an underground spray device. Background Technology

[0002] During underground mining operations, a large amount of dust is generated. The confined space underground is filled with dust, which poses a significant health risk to workers who often work underground for extended periods. Furthermore, the high dust levels can easily cause explosions and serious safety accidents. Traditionally, dust suppression systems using water spray are installed underground to remove dust and improve the working environment. However, the atomization effect of water spray alone is unsatisfactory, often resulting in dripping water that doesn't cover the entire tunnel face. Additionally, since underground water is typically recycled, the inlet pipe is prone to blockage. A filter is usually added to the nozzle inlet, but cleaning this filter is inconvenient. Since the spray nozzles are usually suspended from the ceiling, cleaning requires climbing, which is time-consuming, labor-intensive, and carries the risk of falls. Chinese utility model CN ​​208406441 U discloses a spray dust suppression system with a backwashing device on the water inlet pipe for simple rinsing of the filter. However, the low temperature of underground water results in poor rinsing effectiveness. Summary of the Invention

[0003] The technical problem solved by this utility model is that existing downhole spraying devices have small spray area, inconvenient filtration and cleaning, and poor cleaning effect.

[0004] This utility model provides a downhole spraying device, including a spraying pipeline, a water supply pipeline, a cleaning water tank, a backwashing pipeline, a nozzle, and a PLC controller. The nozzle is connected to the water supply pipeline via the spraying pipeline. A first filter element is provided at the outlet of the water supply pipeline, and a first shut-off valve and a second shut-off valve are respectively provided upstream and downstream of the first filter element.

[0005] The cleaning water tank is connected downstream of the first filter element via a backwashing pipeline. An electric heater and a thermometer are respectively installed on both sides of the cleaning water tank. A backwashing valve is installed on the backwashing pipeline. A first drain valve is connected between the first shut-off valve and the first filter element. The input terminal of the PLC controller is electrically connected to the thermometer, and the output terminal of the PLC controller is electrically connected to the first shut-off valve, the second shut-off valve, the backwashing valve, the first drain valve, and the electric heater switch.

[0006] Furthermore, it also includes an air supply pipeline, which is connected to the spray pipeline. A second filter element is provided at the air outlet of the air supply pipeline. A third shut-off valve and a fourth shut-off valve are respectively provided upstream and downstream of the second filter element. The downstream of the second filter element is connected to the backwashing pipeline via a pipeline. A second drain valve is provided between the third shut-off valve and the first filter element. The third shut-off valve, the fourth shut-off valve, and the second drain valve are all electrically connected to the output terminal of the PLC controller.

[0007] Furthermore, the PLC controller controls the first, second, third, and fourth shut-off valves to be in the open state, while other valves are in the closed state. The spray pipeline mixes and atomizes air and water. Every time the spray pipeline runs for a period of time T1, the PLC controller controls the backwash valve, the first and second drain valves to be in the open state, and other valves to be in the closed state, to clean the first and second filter elements. The cleaning time is T2.

[0008] Furthermore, when the thermometer temperature is below 40°C, the PLC controller controls the electric heater switch to turn on; when the thermometer temperature is above 60°C, the PLC controller controls the electric heater switch to turn off.

[0009] Furthermore, every 6-8 hours of operation of the nozzle, the PLC controller controls the backwash valve to clean the first and second filter elements for 3-5 minutes.

[0010] Furthermore, the nozzle is provided in multiple ways, and the multiple nozzles are arranged in parallel.

[0011] Furthermore, both the first and second filter elements are washable filter elements.

[0012] The present invention has the following beneficial effects: The underground spray device of the present invention uses a cleaning water tank to backwash the filter element with hot water, which cleans it thoroughly. At the same time, it realizes automatic cleaning and cyclic cleaning through PLC controller, which is easy to operate and improves cleaning efficiency. In addition, the addition of an air supply pipe makes the spray area larger and the atomization effect better, further improving the underground working environment. Attached Figure Description

[0013] Figure 1 Schematic diagram of the downhole spray device of this utility model. Detailed Implementation

[0014] To clearly illustrate the technical features of this solution, specific embodiments are described below in conjunction with the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model.

[0015] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0016] like Figure 1 As shown, a downhole spraying device includes a spraying pipeline 3, a water supply pipeline 1, an air supply pipeline 2, nozzles 4, a backwashing pipeline 5, a PLC controller, and a cleaning water tank. Multiple nozzles 4 are provided and connected in parallel, and are respectively connected to the water supply pipeline 1 and the air supply pipeline 2 via the spraying pipeline 3.

[0017] A first filter element 6 and a second filter element 7 are respectively installed at the water outlet of the water supply pipeline 1 and the air outlet of the air supply pipeline 2. In this embodiment, the first filter element 6 and the second filter element 7 are washable filter elements. A first shut-off valve 101 and a second shut-off valve 102 are respectively installed upstream and downstream of the first filter element 6, and a third shut-off valve 201 and a fourth shut-off valve 202 are respectively installed upstream and downstream of the second filter element 7.

[0018] The cleaning water tank is connected downstream of the first filter element 6 via the backwashing pipeline 5. An electric heater and a thermometer are respectively installed on both sides of the cleaning water tank. A backwashing valve 501 is installed on the backwashing pipeline 5. A first drain valve 502 is installed between the first shut-off valve 101 and the first filter element 6. The downstream of the second filter element 7 is connected to the backwashing pipeline 5 via a connecting water pipe. A second drain valve 503 is installed between the third shut-off valve 201 and the second filter element 7.

[0019] The PLC controller input is electrically connected to the thermometer, and the PLC controller output is electrically connected to the first shut-off valve 101, the second shut-off valve 102, the backwash valve 501, the first drain valve 502, the electric heater switch, the third shut-off valve 201, the fourth shut-off valve 201, and the second drain valve 503, respectively. The PLC controller controls the first, second, third, and fourth shut-off valves to be in the open state, while the other valves are in the closed state. The spray pipe 3 mixes and atomizes the air and water, resulting in better atomization and a larger coverage area. Every T1 period of operation, the PLC controller controls the backwash valve 501, the first drain valve 502, and the second drain valve 503 to be in the open state, while the other valves are in the closed state, to clean the first filter element 6 and the second filter element 7. The cleaning time is T2.

[0020] In this embodiment, the nozzle 4 cleans the first filter element 6 and the second filter element 7 every 6-8 hours, with a cleaning time of 3-5 minutes, realizing automatic circulation cleaning of the filter elements. When the thermometer temperature is below 40℃, the PLC controller controls the electric heater switch to turn on; when the thermometer temperature is above 60℃, the PLC controller controls the electric heater switch to turn off. The filter elements are cleaned with hot water, resulting in a more thorough cleaning.

[0021] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0022] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A downhole spraying device, characterized in that, Includes spray piping, water supply piping, cleaning water tank, backwashing piping, nozzles, and PLC controller. The nozzle is connected to the water supply pipeline via a spray pipe. A first filter element is installed at the outlet of the water supply pipeline. A first shut-off valve and a second shut-off valve are respectively installed upstream and downstream of the first filter element. The cleaning water tank is connected downstream of the first filter element via a backwashing pipeline. An electric heater and a thermometer are respectively installed on both sides of the cleaning water tank. A backwashing valve is installed on the backwashing pipeline. A first drain valve is connected between the first shut-off valve and the first filter element. The input terminal of the PLC controller is electrically connected to the thermometer. The output terminal of the PLC controller is electrically connected to the first shut-off valve, the second shut-off valve, the backwashing valve, the first drain valve, and the switch of the electric heater.

2. The downhole spray device according to claim 1, characterized in that, It also includes an air supply pipeline, which is connected to the spray pipeline. A second filter element is provided at the air outlet of the air supply pipeline. A third shut-off valve and a fourth shut-off valve are respectively provided upstream and downstream of the second filter element. The downstream of the second filter element is connected to the backwashing pipeline via a pipeline. A second drain valve is provided between the third shut-off valve and the first filter element. The third shut-off valve, the fourth shut-off valve, and the second drain valve are all electrically connected to the output terminal of the PLC controller.

3. The downhole spraying device according to claim 2, characterized in that, The PLC controller controls the first, second, third, and fourth shut-off valves to be in the open state, while other valves are in the closed state. The spray pipeline mixes and atomizes air and water. Every T1 period of time the spray pipeline runs, the PLC controller controls the backwash valve, the first and second drain valves to be in the open state, and other valves to be in the closed state, to clean the first and second filter elements. The cleaning time is T2.

4. The downhole spraying device according to claim 2, characterized in that, When the thermometer temperature is below 40°C, the PLC controller controls the electric heater switch to turn on; when the thermometer temperature is above 60°C, the PLC controller controls the electric heater switch to turn off.

5. The downhole spraying device according to claim 4, characterized in that, Every 6-8 hours of operation, the PLC controller controls the backwash valve to clean the first and second filter elements for 3-5 minutes.

6. The downhole spraying device according to claim 1 or 2, characterized in that, The nozzles are provided in multiple ways, and the multiple nozzles are arranged in parallel.

7. The downhole spraying device according to claim 2, characterized in that, The first and second filter elements are washable filter elements.

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