Spraying device for coal face

Abstract

The utility model discloses a coal face spraying device which is applied to the technical field of underground coal mining tools and comprises an air spraying assembly, the air spraying assembly comprises a water path (5) connected with a water source and a high-pressure air path (2) connected with high-pressure gas, a plurality of water outlet connectors are arranged on the water path (5), and a plurality of air outlet connectors are arranged on the high-pressure air path (2). A water inlet and an air inlet of the spray head (6) are connected with a water outlet connector of the water path (5) and an air outlet connector of the high-pressure air path (2) respectively, the height of the water inlet is lower than that of the air inlet, and the air inlet is communicated with the water inlet. According to the coal face spraying device, the high-pressure air path is added, and the spraying force is increased, so that the spraying area and the spraying effect are increased, and the dust falling effect is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of underground coal mining tools, and in particular to a spray device for coal mining faces. Background Technology

[0002] When working in underground coal mining faces, such as during coal mining, frame shifting, and coal release, a large amount of dust is generated due to the movement of the coal wall or roof. This seriously affects the health of workers at the coal mining face, obstructs the operator's view and the view of various cameras, and also affects the service life of various precision electro-hydraulic control components.

[0003] Currently, the solution to this problem in coal mining faces is to use spray devices for dust suppression. These devices operate via the existing underground water supply system, with an automatic spray control valve on a hydraulic support. However, existing spray devices suffer from low water pressure, resulting in a small spray area at startup and only moderate dust suppression effectiveness. Furthermore, the nozzles are prone to clogging over time, and once clogged, they cannot be effectively cleaned, further reducing the spraying efficiency.

[0004] In summary, how to effectively solve the problem of poor spraying effect in existing spraying devices is an urgent issue that needs to be addressed by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a coal mining face spraying device that increases the high-pressure air path and spraying force, thereby increasing the spraying area and spraying effect, and significantly improving the dust suppression effect.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A coal mining face spraying device includes an air spraying assembly. The air spraying assembly includes a water path connected to a water source and a high-pressure air path connected to high-pressure gas. The water path has multiple water outlets, and the high-pressure air path has multiple air outlets. It also includes nozzles with water inlets and air inlets connected to the water outlets of the water path and the air outlets of the high-pressure air path, respectively. The height of the water inlet is lower than the height of the air inlet, and the air inlet is connected to the water inlet.

[0008] Optionally, the air spray assembly includes a spray block, the water channel and the high-pressure air channel are opened in the spray block, one end of the water channel and the high-pressure air channel is an open end and the other end is a blind end, and the height of the water channel is lower than the height of the high-pressure air channel.

[0009] Optionally, the air outlet is located at the lower end of the high-pressure air path, and the water path is cut off below the corresponding air outlet to form the water outlet and the water inlet. The spray block is provided with a connecting passage that connects the water outlet, the water inlet, and the air outlet. The connecting passage is provided with a high-pressure water nozzle that penetrates the spray block. The high-pressure water nozzle is connected to the main inlet that connects the water inlet and the air inlet.

[0010] Optionally, the high-pressure water nozzle is connected to the main inlet of the nozzle via a universal joint, and the open ends of the water passage and the high-pressure air passage are connected with quick-connect fittings.

[0011] Optionally, the spray block is provided with a countersunk hole at the high-pressure water nozzle, and the connecting surface of the nozzle abuts against the surface of the countersunk hole.

[0012] Optionally, the water path and the high-pressure air path are parallel in direction, and the angle between the axial direction of the connecting path and the axial direction of the high-pressure air path is 0-180°.

[0013] Optionally, the inner diameter of the connecting passage increases from the high-pressure air passage to the water passage.

[0014] Optionally, it also includes an ear plate, through which the air spray assembly is mounted on the frame. The ear plate includes a horizontal module slidably connected to the air spray assembly, a vertical module connected to the horizontal module, and a rotating module connected to the vertical module.

[0015] Optionally, it also includes a high-pressure flushing mechanism, the high-pressure flushing mechanism comprising:

[0016] A water pressure sensor used to detect the water pressure at the nozzle;

[0017] A pressure control unit connected to the water pressure sensor, used to control the high-pressure air path to enter the air with flushing pressure when the water pressure sensor detects that the current water pressure of the nozzle is lower than the set water pressure value; and to control the high-pressure air path to enter the air with working pressure when the water pressure sensor detects that the current water pressure of the nozzle is not lower than the set water pressure value.

[0018] Optionally, the air outlet is provided with a control valve to control its on / off state.

[0019] The beneficial effects of this invention are as follows: the air spray assembly includes a water path and a high-pressure air path. The water path is connected to a water source, and the high-pressure air path is connected to high-pressure gas. The water path has multiple water outlets, and the high-pressure air path has multiple air outlets. Each water outlet corresponds to one air outlet, and the number of water and air outlets can be adjusted according to actual usage requirements. The interfaces are used to connect to the nozzle, allowing water and high-pressure gas to be delivered to the nozzle. The nozzle includes a water inlet and an air inlet. The water inlet connects to the water outlet of the water path, and the air inlet connects to the air outlet of the high-pressure air path. The water inlet is positioned lower than the air inlet, and the air inlet is connected to the water inlet. Water and high-pressure gas mix inside the nozzle, and the high-pressure gas pushes the water through the nozzle to form an atomized spray effect. This atomization effect helps to capture and settle dust particles in the air, thereby reducing dust concentration and improving the working environment.

[0020] The coal mining face spraying device provided by this utility model, through the rational design of the nozzles and spraying system, can significantly increase the spraying force, thereby increasing the spraying area and spraying effect, greatly improving the dust suppression effect, effectively reducing the dust concentration at the working face, and improving the safety and comfort of the working environment; at the same time, because the high-pressure air path can clean the nozzles, it can effectively prevent the nozzles from clogging, and significantly improve the service life of the nozzles and the entire spraying device. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a coal mining face spraying device provided in a specific embodiment of the present invention.

[0023] Figure label:

[0024] Ear plate 1, high-pressure air path 2, quick connector 3, spray block 4, water path 5, nozzle 6. Detailed Implementation

[0025] The core of this utility model is to provide a coal mining face spraying device. This coal mining face spraying device increases the high-pressure air path and the spraying force, thereby increasing the spraying area and spraying effect, and greatly improving the dust suppression effect.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a coal mining face spraying device provided in a specific embodiment of the present invention.

[0028] In one specific embodiment, the coal mining face spraying device provided by this utility model includes an air spraying assembly, which includes a water channel 5 connected to a water source and a high-pressure air channel 2 connected to high-pressure gas. The water channel 5 is provided with multiple water outlets, and the high-pressure air channel 2 is provided with multiple air outlets. It also includes a nozzle 6 whose water inlet and air inlet are respectively connected to the water outlet of the water channel 5 and the air outlet of the high-pressure air channel 2. The height of the water inlet is lower than the height of the air inlet, and the air inlet is connected to the water inlet.

[0029] In the above structure, the spray device at the coal mining face is used to reduce dust and improve the working environment, including an air spray assembly and nozzles 6. The air spray assembly includes a water path 5 and a high-pressure air path 2. The water path 5 is connected to a water source, and the high-pressure air path 2 is connected to high-pressure gas. The water path 5 has multiple water outlets, and the high-pressure air path 2 has multiple air outlets. The water outlets and air outlets correspond one-to-one, and the number of water outlets and air outlets can be adjusted according to actual usage requirements. The interfaces are used to connect to the nozzles 6 to deliver water and high-pressure gas to the nozzles 6.

[0030] The nozzle 6 includes a water inlet and an air inlet. The water inlet connects to the water outlet of the water passage 5, and the air inlet connects to the air outlet of the high-pressure air passage 2. The water inlet is positioned lower than the air inlet, and the air inlet and water inlet are connected. Water and high-pressure gas mix inside the nozzle 6, and the high-pressure gas propels the water through the nozzle to create an atomized spray effect. This atomization effect helps to capture and settle dust particles in the air, thereby reducing dust concentration and improving the working environment.

[0031] The coal mining face spraying device provided by this utility model, through the reasonable design of the nozzle 6 and spraying system, can greatly increase the spraying force, thereby increasing the spraying area and spraying effect, significantly improving the dust suppression effect, effectively reducing the dust concentration at the working face, and improving the safety and comfort of the working environment; at the same time, because the high-pressure air path 2 can clean the nozzle 6, it can effectively prevent the nozzle 6 from clogging, and greatly improve the service life of the nozzle 6 and the entire spraying device.

[0032] Based on the above specific embodiments, the air spray assembly includes a spray block 4, a water channel 5 and a high-pressure air channel 2 opened inside the spray block 4, one end of the water channel 5 and the high-pressure air channel 2 is an open end and the other end is a blind end, and the height of the water channel 5 is lower than the height of the high-pressure air channel 2.

[0033] In one specific embodiment, the spray block 4 is the main structure of the air spray assembly. The water channel 5 and the high-pressure air channel 2 are both opened inside the spray block 4. The water channel 5 and the high-pressure air channel 2 are channels in the spray device for conveying water and high-pressure gas. One end of the channel is an open end, which is used to connect to the external water source and high-pressure gas source; the other end is a blind end, that is, a closed end, which is used to form a closed channel inside the spray block 4.

[0034] High-pressure gas enters the spray block 4 through high-pressure air passage 2, while water enters through water passage 5. Because the water passage 5 is lower than the high-pressure air passage 2, the high-pressure gas meets the water before reaching the nozzle 6. Utilizing gravity and pressure difference, the high-pressure gas propels the water flow, forming a gas-water mixture. This mixture further mixes and atomizes at the nozzle 6, forming a spray.

[0035] Based on the above structure, integrating the water channel 5 and the high-pressure air channel 2 within the spray block 4 makes the entire spraying device more compact, facilitating installation and maintenance. The height difference design between the water channel 5 and the high-pressure air channel 2 allows for more effective utilization of the pressure difference, improving spray efficiency and uniformity. Furthermore, the staggered vertical arrangement of the water channel 5 and the high-pressure air channel 2 not only facilitates connection to the nozzle 6 but also reduces mutual interference between them, improving spray stability. This makes the spraying device more suitable for coal mining faces, effectively reducing dust concentration, improving the working environment, and protecting worker health.

[0036] Based on the above specific embodiments, the air outlet is located at the lower end of the high-pressure air path 2, the water path 5 is cut off below the corresponding air outlet to form a water outlet and a water inlet, the spray block 4 is provided with a connecting passage connecting the water outlet, the water inlet and the air outlet, the connecting passage is provided with a high-pressure water nozzle that penetrates the spray block 4, and the high-pressure water nozzle is connected to the main inlet connecting the water inlet and the air inlet.

[0037] In one specific embodiment, the air outlet is located at the lower end of the high-pressure air path 2, and the high-pressure gas will be released from the lower outlet of the high-pressure air path 2. The water path 5 is cut off below the corresponding air outlet, forming a water outlet and a water inlet, allowing the water flow to not only reach the outlet of the nozzle 6, but also be guided to the next water outlet point. The spray block 4 is provided with a connecting passage, which connects the water outlet, the water inlet, and the air outlet. The connecting passage is a key channel for mixing water and air flow, realizing the mixing of water and high-pressure gas inside the connecting passage. The connecting passage is provided with a high-pressure water nozzle that penetrates the spray block 4, and the high-pressure water nozzle is the outlet for the spray formed after the water and air flow are mixed. The high-pressure water nozzle is connected to the main inlet that connects the water inlet and the air inlet. After the water and high-pressure gas enter the connecting passage, they mix and exit from the spray outlet, and then enter the nozzle 6 from the main inlet, and are then released in the form of a spray through the outlet of the nozzle 6.

[0038] Based on the above structure, the design of the connecting channel allows water and high-pressure gas to be fully mixed before entering the nozzle 6, achieving effective mixing and spraying of water and high-pressure gas, and improving spraying efficiency. The high-pressure water nozzle of the connecting channel can be connected to one port of the nozzle 6, and the air inlet and water inlet are combined into one, making the structure of the spraying device simpler and more compact, and easier to install and maintain.

[0039] In a preferred embodiment, the air spray assembly includes a chamber for accommodating the nozzle 6. The upper air inlet of the nozzle 6 is connected to the air outlet of the high-pressure air path 2. The water inlets and outlets on both sides of the nozzle 6 are respectively connected to the water outlet and water passage of the water path 5. The distance between the water outlet and water passage of the water path 5 is greater than the distance between the water inlet and water passage of the nozzle 6. The water outlet and water inlet are connected by distance adjustment joints, and the water passage and water passage are connected by angle adjustment joints.

[0040] Based on the above specific embodiments, the high-pressure water nozzle and the main inlet of the nozzle 6 are connected by a universal joint. The universal joint allows for greater flexibility and freedom between the high-pressure water nozzle and the main inlet of the nozzle 6, so that the connection can be made at different angles and directions without restriction. This makes the installation and adjustment of the spray device more convenient, especially in the coal mining environment where space is limited or frequent movement is required.

[0041] Based on the above specific embodiments, quick-connect fittings 3 are connected to the open ends of the water passage 5 and the high-pressure air passage 2. Quick-connect fittings 3 allow for quick and easy connection and disconnection of the water passage 5 and the high-pressure air passage 2. Especially when maintenance or component replacement is required, quick-connect fittings 3 simplify disassembly and reinstallation, making them more suitable for use in industrial environments such as coal mining, thus improving work efficiency and reducing maintenance costs. Simultaneously, they reduce the risk of leakage at the connection points, ensuring the sealing and safety of the spray system.

[0042] Based on the above specific embodiments, the spray block 4 is provided with a countersunk hole at the high-pressure water nozzle, and the connecting surface of the nozzle 6 abuts against the surface of the countersunk hole.

[0043] In one specific embodiment, the countersunk hole is a conical or cylindrical groove machined in the spray block 4, with a larger top diameter and a smaller bottom diameter. The connecting surface of the nozzle 6 abuts against the surface of the countersunk hole, providing a stable connection platform. This allows the high-pressure spray nozzle to fit tightly with the connecting surface of the nozzle 6, ensuring the stability and sealing of the nozzle 6 under high-pressure operating conditions. It also makes the replacement and maintenance of the nozzle 6 more convenient. The depth and angle of the countersunk hole can be adjusted as needed to accommodate different models and specifications of nozzles 6, providing design flexibility.

[0044] Based on the above specific embodiments, the water path 5 and the high-pressure air path 2 are parallel in direction and are arranged in a straight line within the spray block 4, which simplifies the manufacturing process and may reduce turbulence in fluid dynamics, thereby improving the uniformity and efficiency of the spray.

[0045] The angle between the axis of the connecting channel and the axis of the high-pressure air path 2 can be any value between 0 and 180°. For example, the angle between the axis of the connecting channel and the axis of the high-pressure air path 2 can be 60° or 90°. This angle range provides great flexibility. The direction of the connecting channel can be adjusted according to specific application requirements and space constraints. The layout of the spray block 4 can be optimized in a limited space, the coverage of the spray can be controlled, and the uniformity of the spray can be optimized to adapt to different installation environments.

[0046] In summary, the parallel design of the water path 5 and the high-pressure air path 2 along their axes, as well as the flexible adjustment of the connecting path axis, provides great flexibility and optimization space for the design of the spray device. This helps to adapt to different working environments and ensures that water and high-pressure gas can mix efficiently when entering the connecting path to form a uniform spray.

[0047] Based on the above specific embodiments, the inner diameter of the connecting passage increases from the high-pressure air passage 2 to the water passage 5, that is, the inner diameter of the connecting passage increases from the inlet to the outlet. Specifically, it can be a stepped type or a flared type. As the inner diameter of the connecting passage increases, the flow resistance of the mixed fluid of water and high-pressure gas decreases, improving the efficiency of fluid flow and helping to form a more uniform spray at the outlet, which is very important for improving the spray coverage and dust suppression effect. The gradual increase in inner diameter can reduce the pressure loss of the fluid during the flow process and make it easier to maintain the pressure balance between the high-pressure air passage 2 and the water passage 5.

[0048] Based on the above specific embodiments, it also includes an ear plate 1. The air spray assembly is mounted on the frame through the ear plate 1. The ear plate 1 includes a horizontal module that is slidably connected to the air spray assembly, a vertical module that is connected to the horizontal module, and a rotating module that is connected to the vertical module.

[0049] In one specific embodiment, the air spray assembly is mounted on the frame via a lug 1. This mounting method provides a stable platform, ensuring the stability and reliability of the air spray assembly during operation. The lug 1 includes a horizontal module, a vertical module, and a rotating module, which work together to achieve stable installation and adjustment of the air spray assembly.

[0050] The horizontal module is slidably connected to the air spray assembly, which can move or adjust in the horizontal direction to fine-tune its position as needed to adapt to different spray coverage ranges and angles.

[0051] The vertical module connects to the horizontal module and its function is to move the spray assembly from a horizontal position to a vertical position, or to adjust its height, so as to position and fix the air spray assembly in the vertical direction.

[0052] The rotating module connects to the vertical module, allowing the air spray assembly to rotate around an axis, thus changing the spray direction to adapt to different operational needs and environmental conditions.

[0053] Based on the above structure, the ear plate 1 achieves stable installation and flexible adjustment of the spraying assembly on the frame through the coordinated work of the horizontal module, vertical module and rotating module. Through sliding connection, height adjustment and rotation function, the spraying device can quickly adapt to different working environments and requirements, improving the efficiency and effect of spraying operations.

[0054] Based on the above specific embodiments, a high-pressure rinsing mechanism is also included, which includes:

[0055] A water pressure sensor used to detect water pressure at 6 points on the nozzle;

[0056] A pressure control unit connected to a water pressure sensor, used to control the high-pressure air path 2 to intake air at flushing pressure when the water pressure sensor detects that the current water pressure of the nozzle 6 is lower than the set water pressure value; and to control the high-pressure air path 2 to intake air at working pressure when the water pressure sensor detects that the current water pressure of the nozzle 6 is not lower than the set water pressure value.

[0057] In practical applications, the high-pressure flushing mechanism includes a water pressure sensor and an air pressure control unit. The water pressure sensor detects the water pressure at nozzle 6, monitoring changes in water pressure at nozzle 6 in real time to ensure the normal operation of the spray system. The air pressure control unit is connected to the water pressure sensor and controls the air pressure of the high-pressure air path 2 based on the sensor's detection results to ensure the water pressure at nozzle 6 is maintained at the set value. Specifically, when the water pressure sensor detects that the current water pressure at nozzle 6 is lower than the set value, it indicates a blockage in the spray device. The air pressure control unit then controls the high-pressure air path 2 to use flushing air pressure to clear any blockages or deposits, keeping nozzle 6 unobstructed. When the current water pressure at nozzle 6 is detected to be no lower than the set value, the high-pressure air path 2 is controlled to use operating air pressure to maintain normal spraying operation.

[0058] Based on the above structure, an automated control system can automatically adjust the air pressure according to real-time water pressure data, reducing manual intervention and improving operational efficiency. Adjusting the air pressure maintains the water pressure at nozzle 6, ensuring the uniformity and effectiveness of the spray system. When the water pressure is lower than the set value, increasing the air pressure to flush nozzle 6 can prevent or clear clogging and extend its service life.

[0059] Based on the above specific embodiments, a control valve is provided at the air outlet to control its on / off state.

[0060] In practical applications, the main function of a control valve is to control the flow of gas or liquid, automatically adjusting pressure and flow rate. In a spray system, the control valve can precisely control the air pressure in the high-pressure air path 2 and can individually control the operating status of each nozzle 6 to adapt to different working conditions and requirements. The control valve can be used in conjunction with other automation components such as sensors and actuators to achieve automated control of the spray system. For example, when the water pressure sensor detects that the water pressure at nozzle 6 is lower than the set value, the control valve can automatically adjust to flush the air intake and maintain the normal operation of the spray system.

[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0062] The above provides a detailed description of the coal mining face spraying device provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, this utility model is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spraying device for a coal mining face, characterized in that, The system includes an air spray assembly, comprising a water path (5) connected to a water source and a high-pressure air path (2) connected to a high-pressure gas source. The water path (5) has multiple water outlets, and the high-pressure air path (2) has multiple air outlets. It also includes a nozzle (6) with an inlet and an outlet connected to the water outlet of the water path (5) and the air outlet of the high-pressure air path (2), respectively. The height of the inlet is lower than the height of the outlet, and the outlet is connected to the inlet. The air spray assembly includes a spray block (4), the water channel (5) and the high-pressure air channel (2) are opened inside the spray block (4), the height of the water channel (5) is lower than the height of the high-pressure air channel (2), the axial directions of the water channel (5) and the high-pressure air channel (2) are parallel, the angle between the axial direction of the connecting passage of the air outlet and the axial direction of the high-pressure air channel (2) is 0-180°, and the inner diameter of the connecting passage increases from the high-pressure air channel (2) to the water channel (5); It also includes an ear plate (1), the air spray assembly is mounted on the frame via the ear plate (1), the ear plate (1) includes a horizontal module slidably connected to the air spray assembly, a vertical module connected to the horizontal module, and a rotating module connected to the vertical module; It also includes a high-pressure flushing mechanism, which comprises: A water pressure sensor is used to detect the water pressure at the nozzle (6); A pressure control unit connected to the water pressure sensor, used to control the high-pressure air path (2) to take in air at flushing pressure when the water pressure sensor detects that the current water pressure of the nozzle (6) is lower than the set water pressure value; and to control the high-pressure air path (2) to take in air at working pressure when the water pressure sensor detects that the current water pressure of the nozzle (6) is not lower than the set water pressure value.

2. The coal mining face spraying device according to claim 1, characterized in that, One end of the water passage (5) and the high-pressure air passage (2) is an open end, and the other end is a blind end.

3. The coal mining face spraying device according to claim 2, characterized in that, The air outlet is located at the lower end of the high-pressure air path (2). The water path (5) is cut off below the corresponding air outlet to form the water outlet and water inlet. The spray block (4) is provided with a connecting passage that connects the water outlet, the water inlet and the air outlet. The connecting passage is provided with a high-pressure water nozzle that is connected to the spray block (4). The high-pressure water nozzle is connected to the main inlet that connects the water inlet and the air inlet.

4. The coal mining face spraying device according to claim 3, characterized in that, The high-pressure water nozzle is connected to the main inlet of the nozzle (6) via a universal joint, and the opening ends of the water passage (5) and the high-pressure air passage (2) are connected to quick-connect fittings (3).

5. The coal mining face spraying device according to claim 3, characterized in that, The spray block (4) has a countersunk hole at the high-pressure water nozzle, and the connecting surface of the nozzle (6) abuts against the surface of the countersunk hole.

6. The coal mining face spraying device according to claim 1, characterized in that, The air outlet is equipped with a control valve to control its on / off state.

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