Novel noise reduction spraying device for coal mine dust prevention
By designing a spray device with a swivel-like upper and lower chamber shell, combined with a diffuser, asbestos sound insulation mesh, and porous baffles, the problems of small spray area, high noise, and water seepage in the air duct were solved. This achieved a larger spray area, noise reduction, and prevention of water accumulation in the air duct, thus improving the working environment in coal mines.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-04-03
AI Technical Summary
Existing dust suppression spraying devices in coal mines suffer from problems such as small spray area, easy clogging of spray holes, high noise, and water seepage through air ducts, which affect the spraying effect and the health of workers.
Design a spray device consisting of two parts, an upper chamber shell and a lower chamber shell, which are screwed together by a threaded groove and have an O-ring seal inside for a tight connection; the inside is equipped with a diffuser and a diffuser hole, and after the air is introduced, it passes through an asbestos sound insulation mesh and a porous baffle to reduce noise; the air inlet connector and the water inlet connector are set vertically to prevent water from entering the air duct.
It increases the spray area, reduces noise, prevents water accumulation in the duct, enhances the spray atomization effect, and improves the quietness of the working environment and the hearing health of the workers.
Smart Images
Figure CN224079177U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of coal mine dust suppression spray equipment, specifically a novel noise reduction spray device for coal mine dust suppression. Background Technology
[0002] With increasingly stringent requirements for environmental protection and occupational health in coal mining, higher demands have been placed on dust control in underground coal mines. Consequently, dust suppression spraying has become widely used. However, existing dust suppression spraying devices have encountered some problems in practical applications. Currently, there are two main types of existing dust suppression spraying devices: 1. Single-pole spraying using a static pressure water pipe to provide water source and pressure; 2. Multi-hole spraying with air-water linkage. However, these methods have some issues:
[0003] The problem with single-pole spraying is its small spray area, requiring a large number of spray heads, and the spray holes are prone to clogging, resulting in a high failure rate. Multi-hole spraying systems linked to air and water systems suffer from significant noise. High-pressure air enters the shared air and water storage chamber through the inlet, and the concentrated high-pressure air produces a whistling sound. This noise has a significant impact in the relatively enclosed space underground, seriously affecting the hearing and mental and physical health of on-site workers, and also hindering their communication. Another problem is water seepage into the ducts, where high-pressure water enters and causes water accumulation, leading to insufficient air pressure and affecting the spray atomization effect. Utility Model Content
[0004] The purpose of this invention is to provide a novel noise-reducing spray device for dust control in coal mines. This addresses the problems of single-pole spray systems, which suffer from small spray areas, require numerous spray heads, and are prone to clogging, resulting in a high failure rate. Furthermore, multi-hole spray systems with integrated air and water systems suffer from significant noise. Another issue is water leakage into the ductwork, where high-pressure water enters and accumulates, leading to insufficient air pressure and affecting the atomization effect of the spray.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A novel noise-reducing spray device for dust control in coal mines, installed in underground roadways and connected to the top of an adjustable device. The spray device consists of two parts: an upper cavity shell and a lower cavity shell. Both the upper and lower cavity shells are cylindrical hollow shells. An air inlet connector is provided at the top of the upper cavity shell, and a diffuser is connected inside. The diffuser is connected to the air inlet connector. Several diffusion holes are evenly distributed on the outer circumference of the diffuser. An outer... The threaded groove has an O-ring connected to its terminating end. A water inlet connector is connected to the outer side of the lower cavity shell. A V-shaped groove is formed on the outer circumference of the lower cavity shell. Several spray holes are evenly formed on the inner circumference of the inner circumference of the top pipe opening of the lower cavity shell. An internal threaded groove is formed on the vertical end of the stepped groove. The internal threaded groove is screwed into the external threaded groove of the upper cavity shell. A groove that mates with the O-ring is formed on the terminating end of the internal threaded groove. A perforated partition is placed on the transverse end of the stepped groove. A sound insulation mesh is placed on the perforated partition.
[0006] Preferably, the internal thread groove and the external thread groove are M103×2, and the end of the thread is provided with a relief groove of 4×2.
[0007] Preferably, the porous partition is made of steel plate Φ2.5mm thick, with a diameter of Φ101mm and a Φ5mm hole drilled in the plane.
[0008] Preferably, the sound insulation mesh is made of asbestos mesh and is used to reduce noise.
[0009] Preferably, the water inlet connector is a single-ended high-pressure pipe connector, welded to the bottom of the lower cavity shell at a point 45mm above the pipe wall, and communicating with the interior of the lower cavity shell for connection to a water source.
[0010] Preferably, the air inlet connector is a single-ended high-pressure pipe connector, which is connected to the diffuser at one end and to an external air source at the other end.
[0011] Preferably, the V-shaped groove is located 20mm above the bottom of the lower cavity outer shell 7 and is 3mm deep.
[0012] Preferably, the spray hole is Φ1mm.
[0013] Preferably, the adjustable device includes a support rod and a telescopic rod. The support rod is installed on the ground in the underground roadway and has a telescopic rod inserted inside it. The telescopic rod is slidably fitted to the support rod. A spraying device is provided at the top of the telescopic rod. The support rod has several linkage holes, and the telescopic rod has several connecting holes corresponding to the linkage holes. A positioning screw is inserted into the linkage hole for adjusting the spraying height.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] The upper and lower outer shells are screwed together via threaded grooves, facilitating installation, disassembly, and maintenance. O-rings at the internal connection ensure a tight seal. Airflow first passes through an asbestos soundproof mesh, then through a porous partition before entering the lower outer shell, effectively absorbing and reducing noise transmission, improving the quietness of the working environment and alleviating auditory stress for workers. Water entering the lower outer shell is atomized by the combined air and water spray for dust suppression. Furthermore, the vertical placement of the air and water inlets (with the air inlet at the top) prevents water from entering the air duct as it enters the cavity of the upper outer shell, thus preventing water accumulation within the ductwork. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model.
[0017] Figure 2 This is a schematic diagram of the upper cavity shell structure of this utility model.
[0018] Figure 3 This is a schematic diagram of the lower cavity shell structure of this utility model.
[0019] Figure 4 This is a schematic diagram illustrating the working principle of this utility model.
[0020] In the diagram: 1. Air inlet connector; 2. Upper cavity shell; 3. Diffuser; 5. O-ring seal; 7. Lower cavity shell; 8. Water inlet connector; 9. V-groove; 10. Spray hole; 11. Support rod; 12. Telescopic rod; 13. Positioning screw. Detailed Implementation
[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," 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 utility model and 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 utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0024] 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.
[0025] Example 1: Please refer to Figure 1-4 This utility model provides an embodiment of a novel noise-reducing spray device for dust control in coal mines. Installed in an underground roadway and connected to the top of an adjustable device, the spray device consists of two parts: an upper outer shell 2 and a lower outer shell 7. The upper outer shell 2, as the upper part of the spray device, houses the air inlet connector 1 and the diffuser 3, and provides an interface for connecting to the lower outer shell 7 via a threaded groove, facilitating installation, disassembly, and maintenance. The upper outer shell 2 is made of G4 tubing with a 6mm wall thickness, and the upper end is welded with a 5mm steel plate and drilled with an 18mm hole to connect to the air inlet connector 1. Both the upper and lower outer shells are cylindrical hollow shells, with the air inlet connector located at the top of the upper outer shell 2. 1. The air inlet connector 1 introduces external air into the spray device and connects to the diffuser 3, allowing air energy to enter the internal cavity evenly through the diffusion holes on the circumference of the diffuser 3. Simultaneously, it works in conjunction with the water source in the lower outer shell 7 for atomization. The diffuser 3 is internally connected and is made of pipe G3 / 4, with its lower end welded to a steel plate. The diffuser 3 is connected to the air inlet connector 1. Several diffusion holes are evenly distributed on the outer circumference of the diffuser 3. The bottom end of the upper outer shell 2 has an external threaded groove, and an O-ring seal 5 is connected to the terminating end of the external threaded groove. By creating a relief groove 4x2, and connecting the O-ring seal 5 to the circumference of the terminating end of the external threaded groove, the O-ring seal 5 is located at the threaded connection, ensuring a tight connection of the outer shell and preventing leakage.
[0026] The lower cavity outer shell 7 is made of G4 tubing with a wall thickness of 6mm. The lower end is welded shut with a 5mm thick steel plate, and the other end of the tubing is machined with a step. The lower outer shell 7 is 6mm long and has an inlet connector 8 on its outer side. A V-groove 9 is formed on its outer circumference, located 20mm above the bottom of the lower outer shell 7, and 3mm deep. Several spray holes 10, each Φ1mm, are evenly distributed on the circumference of the inner circumference of the V-groove 9. A stepped groove is formed on the inner circumference of the top opening of the lower outer shell 7. An internal thread groove is formed on the vertical end of the stepped groove, which engages with the external thread groove of the upper outer shell 2. A groove for mating with an O-ring seal 5 is formed on the terminating end of the internal thread groove. A perforated baffle is placed on the transverse end of the stepped groove. The perforated baffle is made of Φ2.5mm steel plate, Φ101mm in diameter, with Φ5mm holes drilled in its flat surface. During installation, the perforated baffle is first placed in the lower cavity. On the stepped surface of the internal thread stop end of the outer shell 7, the sound insulation mesh is placed on the plane of the porous partition. The O-ring seal 5 is placed in the relief groove of the external thread stop end of the upper outer shell 2. The upper outer shell 2 and the lower outer shell 7 are screwed together. The O-ring seal 5 plays a sealing role. The sound insulation mesh is laid on the porous partition. The sound insulation mesh is made of asbestos mesh and is used to reduce noise. The internal thread groove and the external thread groove are M103×2. The termination end of the thread is provided with relief groove 4×2. The water inlet connector 8 is a single-ended high-pressure pipe connector, which is welded to the bottom of the lower outer shell 7 45mm above the pipe wall and is connected to the inside of the lower outer shell 7 for connecting to the water source. The air inlet connector 1 is a single-ended high-pressure pipe connector. The air inlet connector 1 is connected to the diffuser 3, and the other end is connected to the external air source.
[0027] In use, the device is installed in an underground tunnel. The upper housing 2 and lower housing 7 are then screwed together, and the air and water inlet valves are opened simultaneously. High-pressure air enters the diffuser 3 inside the upper chamber through the air inlet connector 1, and then enters the upper chamber through the numerous holes on the diffuser 3's pipe wall. Under the action of air pressure, the high-pressure air then enters the lower chamber through the numerous holes in the sound insulation mesh and porous partition. Simultaneously, the sound insulation asbestos mesh and porous partition prevent high-pressure water from entering the air duct. After two stages of diffusion and passing through the sound insulation asbestos mesh, the noise of the high-pressure air is significantly reduced. High-pressure water enters the lower chamber through the water inlet connector 8. Under the action of the high-pressure water and the high-pressure air after two stages of diffusion, the air and water are sprayed out through the spray hole 10 in the lower chamber, creating an atomized effect. Simultaneously, the bottom end of the upper housing 2 and the top end of the lower housing 7 are provided with threaded grooves and fitted with O-ring seals 5. This ensures the airtightness of the upper and lower cavities when they are screwed together, preventing water from seeping into the duct system from the connection.
[0028] Example 2: Please refer to Figure 1 Based on Example 1, it also has the following structure:
[0029] The adjustable device includes a support rod 11 and a telescopic rod 12. The support rod 11 is installed on the ground in the underground roadway, and the telescopic rod 12 is inserted inside it. The telescopic rod 12 is slidably fitted to the support rod 11. A spraying device is provided at the top of the telescopic rod 12. Several linkage holes are opened on the support rod 11, and several connecting holes corresponding to the linkage holes are opened on the telescopic rod 12. A positioning screw 13 is inserted into the linkage hole for adjusting the spraying height. In use, the support rod 11 is installed on the ground, and then the telescopic rod 12 is extended. When the required atomization height is reached, the positioning screw 13 is inserted through the linkage hole and the connecting hole to fix the height of the device, and then atomization is performed to meet the atomization needs of different roadways.
[0030] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A new type of noise reduction spraying device for coal mine dust prevention, installed in the underground roadway, connected to the top end of the adjustable device, characterized in that: The spray device is composed of two parts, including upper cavity shell (2) and lower cavity shell (7), the upper cavity shell (2) and the lower cavity shell (7) are cylindrical hollow shells, the upper cavity shell (2) is provided with an air inlet joint (1) at the top end, and a diffuser (3) is connected inside, the diffuser (3) is connected with the air inlet joint (1), a plurality of diffusion holes are uniformly arranged on the outer circumference of the diffuser (3), an external thread groove is arranged at the bottom opening of the upper cavity shell (2), an O-shaped sealing ring (5) is connected at the end of the external thread groove, the lower cavity shell (7) is connected with a water inlet joint (8) on the outside, a V-shaped groove (9) is arranged on the outer circumference, a plurality of spray holes (10) are uniformly arranged on the circumference in the V-shaped groove (9), a stepped groove is arranged on the inner circumference of the top opening of the lower cavity shell (7), an internal thread groove is arranged at the vertical end of the stepped groove, the internal thread groove is screwed with the external thread groove of the upper cavity shell (2), a groove matched with the O-shaped sealing ring (5) is arranged at the end of the internal thread groove, a multi-hole partition plate is arranged on the horizontal end of the stepped groove, and a soundproof net is arranged on the multi-hole partition plate.
2. A new type of noise reduction spraying device for dust prevention in coal mines according to claim 1, characterized in that: The internal thread groove and the external thread groove are M103x2, and a tool withdrawal groove 4x2 is arranged at the end of the thread.
3. The new noise reduction spraying device for dust prevention in coal mines according to claim 1, characterized in that: The multi-hole partition plate is made of steel plate &2.5mm, the diameter is Φ101mm, and the plane is drilled Φ5mm.
4. The new noise reduction spraying device for dust prevention in coal mines according to claim 1, characterized in that: The soundproof net is made of asbestos net and is used for reducing noise.
5. The new noise reduction spraying device for dust prevention in coal mines according to claim 1, characterized in that: The water inlet joint (8) is a single-head high-pressure pipe joint, which is welded on the bottom of the lower cavity shell (7) and extends upward by 45mm, penetrates the inside of the lower cavity shell (7), and is used for connecting with a water source.
6. A new type of noise reduction spraying device for dust prevention in coal mines according to claim 1, characterized in that: The air inlet joint (1) is a single-head high-pressure pipe joint, the air inlet joint (1) penetrates the diffuser (3), and the other end is connected with an external air source.
7. The new noise reduction spraying device for dust prevention in coal mines according to claim 1, characterized in that: The V-shaped groove (9) is located at the bottom of the lower cavity shell (7) and extends upward by 20mm, and the depth is 3mm.
8. A new type of noise reduction spraying device for dust prevention in coal mines according to claim 7, characterized in that: The spray hole (10) is Φ1mm.
9. The new noise reduction spraying device for dust prevention in coal mines according to claim 1, characterized in that: The adjustable device comprises a support rod (11) and a telescopic rod (12), the support rod (11) is installed on the ground in the underground roadway, the telescopic rod (12) is inserted inside, the telescopic rod (12) is slidingly fitted in the support rod (11), and the top end of the telescopic rod (12) is provided with a spray device, a plurality of linkage holes are arranged on the support rod (11), a plurality of connecting holes corresponding to the linkage holes are arranged on the telescopic rod (12), a positioning screw rod (13) is inserted in the linkage hole, and the positioning screw rod (13) is used for adjusting the spray height.