A type of mining electromechanical equipment for dust suppression

Abstract

This invention discloses a dust-suppressing mining electromechanical equipment, belonging to the technical field of mining electromechanical equipment. It mainly includes a supply box, a cover assembly, an adjustment assembly, and a protective assembly. The cover assembly is connected to the supply box and positioned above the dust source, and is equipped with foam nozzles and coaxially sleeved air curtain nozzles. The adjustment assembly is used to adjust the opening size of the air curtain nozzles and to close them when not in use. The protective assembly includes a sealing unit and a cleaning unit. The sealing unit is used to link with the adjustment assembly, and the cleaning unit triggers air supply during the sealing process of the adjustment assembly. This dust-suppressing mining electromechanical equipment, by spraying a coaxial air curtain around the foam medium to form a protective sleeve, effectively isolates the interference of external negative pressure suction airflow, ensuring the spray kinetic energy. Simultaneously, at the end of the stroke when the adjustment block closes and seals the nozzles, a high-pressure airflow is automatically triggered to blow away the nozzles, achieving self-cleaning during shutdown and physical sealing against dust, thus improving the reliability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of mining machinery and equipment technology, and in particular to a mining machinery and equipment for suppressing dust. Background Technology

[0002] In mining and tunneling operations, active dust suppression methods such as foam or water mist are typically used simultaneously, along with passive dust collection methods such as negative pressure suction. Both methods aim to reduce dust concentration at the working face. However, the high-speed airflow generated by negative pressure suction can easily cause the sprayed foam and other dust suppression media to deviate, making it difficult to effectively cover the dust source.

[0003] To address the aforementioned airflow interference problem, Chinese patent application CN116398215A discloses a foam dust suppression device for mining. This device, through a mechanical linkage mechanism, simultaneously changes the nozzle opening and closing area of ​​the fan-shaped nozzle while the foam flow rate within the foam box is manually adjusted. This approach attempts to overcome the deviation of the foam coverage surface caused by airflow by utilizing the coupled adjustment of flow rate and nozzle area to alter the spraying state.

[0004] However, the aforementioned existing technologies have drawbacks. Existing devices rely on exposed and complex mechanical mechanisms for linkage adjustment. In the high-dust environment of mines, the moving mechanical parts are prone to wear and jamming due to dust accumulation, resulting in low operational reliability. In addition, the coupling adjustment method of rigidly changing the flow rate and nozzle area can easily cause an increase in back pressure inside the pipeline, which in turn damages the physical form of the foam medium. For example, if foam breaks, it will cause the foam jet kinetic energy to decrease and the effective range to shorten. It is difficult to overcome the interference of negative pressure dust suction airflow on the coverage trajectory, resulting in low actual dust reduction efficiency.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] This invention provides a mining electromechanical device for suppressing dust, which solves the technical problems of existing dust suppression devices that rely on complex exposed mechanical mechanisms, which easily lead to dust jamming, and whose rigid coupling adjustment method easily causes the pipeline back pressure to rise and destroy the foam medium morphology, thus making it difficult to overcome the interference of negative pressure suction airflow and resulting in low dust suppression efficiency.

[0007] This invention adopts the following technical solution: a mining electromechanical equipment for suppressing dust. It includes a supply box, located on one side of the equipment, for storing and discharging dust-suppressing media; The cover assembly, connected to the supply box, is positioned above the dust source to cover the work outline, and is equipped with foam nozzles and coaxially sleeved air curtain nozzles. An adjustment component, disposed on the shroud assembly, is used to adjust the opening size of the air curtain nozzle and to close it when not in use; A protective component, disposed on the cover assembly and the adjustment assembly, includes a sealing unit and a cleaning unit. The sealing unit is used to adjust the adjustment assembly in conjunction with the adjustment assembly, and the cleaning unit is used to trigger air supply during the sealing process of the adjustment assembly to blow and clean the surface of the foam nozzle.

[0008] Furthermore, the adjustment assembly includes a fixed sleeve, a protective cover, and fixed feet. The fixed sleeve is coaxially sleeved on the air curtain nozzle and fixed to the surface of the cover assembly. The protective cover is disposed around the fixed sleeve. Two sets of fixed feet are symmetrically arranged vertically. The protective cover is fixed to the fixed sleeve by the fixed feet, which provides dust protection and guiding installation space.

[0009] Furthermore, the adjustment assembly also includes a bidirectional lead screw, a guide slide, an adjustment block, and a sliding block. The bidirectional lead screw bearing is disposed between one set of vertically arranged fixed legs, and the guide slide is fixedly disposed between another set of vertically arranged fixed legs. The adjustment block is arc-shaped and symmetrically arranged in two parts. The sliding block is disposed on the adjustment block. The two adjustment blocks are respectively threaded to the bidirectional lead screw through the sliding block on them, and are movably sleeved on the guide slide. The bidirectional lead screw and the two sets of sliding blocks cooperate to form a helical transmission assembly, which is used to convert the rotational motion into the two adjustment blocks moving in opposite or opposite directions along the guide slide in a vertical direction only, thereby adjusting the opening size and closing state of the air curtain nozzle.

[0010] Furthermore, the enclosed unit includes a mounting frame, several extension rods, worm gears, a drive rod, and a manual turntable. The mounting frame is fixed to the cover assembly. The bottom end of the extension rod is coaxially connected to the bidirectional lead screw and extends upward into the mounting frame. The worm gear is fixed to the end of the extension rod within the mounting frame, and the multiple worm gears are kept flush. The drive rod is horizontally rotatably disposed within the mounting frame, and several worm gears are fixed thereon. The manual turntable is fixed to the end of the drive rod extending out of the mounting frame. The multiple worm gears on the drive rod mesh with the multiple worm gears to form a synchronous transmission engagement, used to synchronously transmit the input rotation of the manual turntable to multiple sets of extension rods and the bidirectional lead screw.

[0011] Furthermore, the cleaning unit includes an arc-shaped pipe, cleaning nozzles, a mounting block, and a fixed-end air port. The arc-shaped pipe is embedded in the upper adjusting block. Several cleaning nozzles are arranged along the arc direction of the arc-shaped pipe, embedded in and flush with the bottom surface of the corresponding adjusting block, for downward blowing. The mounting block is fixed on the upper adjusting block. The fixed-end air port is vertically embedded in the mounting block and connected to the arc-shaped pipe. One end of the fixed-end air port passes through the side of the mounting block and moves vertically synchronously with the adjusting block.

[0012] Furthermore, the cleaning unit also includes an air supply cavity and an air supply pipe. The air supply cavity is horizontally fixed to the upper surface of the fixed sleeve, and one end of it has an air outlet. The air supply pipe is arc-shaped and is set on the cover assembly, connecting several air supply cavities to supply air to them. The air outlet of the air supply cavity is in contact with the side of the mounting block. In the initial state, the air outlet is blocked and closed by the mounting block. When the adjusting block closes towards the center to close the opening of the air curtain nozzle, one end of the fixed end air port gradually slides to connect with the air outlet and conduct, which is used to trigger a high-pressure airflow to rush into the arc-shaped pipe for physical cleaning.

[0013] Furthermore, the cover assembly includes an arc-shaped fixed cover and an arc-shaped distribution pipe. The arc-shaped fixed cover is set above the cutting arm or dust source of the mining electromechanical equipment and serves as the mounting base for each group of foam nozzles. Its arc-shaped structure conforms to the working contour of the cutting head. The arc-shaped distribution pipe is fixedly set on the arc-shaped fixed cover.

[0014] Furthermore, the hood assembly also includes the air curtain nozzle, the arc-shaped groove, and the foam nozzle. Several foam nozzles are radially distributed along the arc direction of the arc-shaped distribution pipe, which work together with the sprayed foam medium to form a semi-enclosed dust curtain. The air curtain nozzle is coaxially sleeved on the corresponding foam nozzle, and the arc-shaped groove is symmetrically opened on the air curtain nozzle. The air curtain nozzle is used to spray out the outer airflow to protect the inner foam medium from interference by the external negative pressure suction airflow.

[0015] Furthermore, the supply box includes an inlet and a main output connector. The inlet is located on the supply box and is used to replenish the liquid or gaseous raw material medium required for dust suppression into the supply box. The main output connector is located on the side of the supply box and is used to uniformly output the dust suppression medium mixed and processed in the supply box to the downstream pipeline.

[0016] Furthermore, the output end of the supply box is also connected to a main delivery pipe, a distributor, and delivery branch pipes. The main delivery pipe is connected to the main output connector and is used to guide the dust-suppressing medium output from the supply box as the main stream. The distributor is connected to the end of the main delivery pipe away from the supply box and is used to distribute the single-path medium flow into multiple branch streams as needed. The delivery branch pipes have at least two sets and are connected between the distributor and the cover assembly, and are used to synchronously distribute the delivered dust-suppressing medium to each set of air curtain nozzles.

[0017] The above-mentioned at least one technical solution adopted in this invention can achieve the following beneficial effects: A dust suppression mining electromechanical device, by incorporating foam nozzles and coaxially sleeved air curtain nozzles on the hood assembly, forms a high-speed air curtain protective sleeve around the sprayed foam. This effectively isolates the passive negative pressure suction airflow from interfering with the active dust suppression medium's coverage trajectory. It abandons the outdated method of rigidly coupling to change the flow rate and nozzle area in existing technologies, avoiding a sharp increase in back pressure inside the pipeline and the phenomenon of medium foam bursting. This ensures the spray kinetic energy and effective range of the foam medium, improving the actual dust suppression efficiency. Simultaneously, by incorporating protective and regulating components and utilizing a closed unit, it achieves air... The system features convenient linkage adjustment of the nozzle opening size and rapid closure when not in use. During the closure process of the adjustment component, the cleaning unit is cleverly triggered to supply air, performing high-pressure physical purging and cleaning of the foam nozzle surface. This mechanical linkage structure not only effectively removes residual foam liquid that is prone to crusting from the nozzle surface without the need for a complex independent control system, but also physically isolates the core nozzle from the high-concentration dust environment through the final closing action. This overcomes the shortcomings of existing dust suppression equipment, such as the easy wear and jamming of complex exposed mechanical parts and the easy clogging of nozzles, and improves the long-term stability of electromechanical equipment under harsh working conditions in mines. Attached Figure Description

[0018] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0019] In the attached diagram: Figure 1 This is an overall schematic diagram of a dust-suppressing mining electromechanical equipment according to this application; Figure 2 for Figure 1 A schematic diagram of the bottom structure; Figure 3 for Figure 2 Schematic diagram of the middle cover assembly structure; Figure 4 for Figure 3 Enlarged view of point A in the image; Figure 5 for Figure 3 A schematic diagram of a partial structure; Figure 6 for Figure 5 Enlarged view of point B; Figure 7 for Figure 3 A schematic diagram of a partial structure; Figure 8 for Figure 7 Enlarged view of point C.

[0020] Figure label: 1. Supply box; 11. Inlet; 12. Main output connector; 13. Main conveying pipe; 14. Distributor; 15. Conveying branch pipe; 2. Cover assembly; 21. Arc-shaped fixed cover; 22. Arc-shaped distribution pipe; 23. Foam nozzle; 24. Air curtain nozzle; 25. Arc-shaped groove; 3. Adjustment assembly; 31. Fixed sleeve; 32. Protective cover; 321. Fixed support foot; 33. Adjustment block; 34. Sliding block; 35. Two-way lead screw; 36. Guide slide rod; 4. Protective assembly; 41. Mounting frame; 42. Extension rod; 43. Worm gear; 44. Drive rod; 45. Manual turntable; 46. Arc-shaped pipe; 47. Cleaning air nozzle; 48. Mounting block; 49. Fixed end air port; 410. Air supply cavity; 411. Air supply pipe. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Reference Figures 1-8 As shown, the present invention provides a mining electromechanical equipment for suppressing dust, which mainly includes a supply box 1 responsible for media storage and distribution, a cover assembly 2 responsible for large-scale foaming, an adjustment assembly 3 responsible for changing the spraying state, and a protective assembly 4 that has both synchronous transmission and self-cleaning functions.

[0024] Regarding the media supply and pipeline layout, a supply box 1 is installed on one side of the electromechanical equipment. The top or side wall of the supply box 1 is provided with an inlet 11 for continuously replenishing the liquid foaming agent, water or gaseous raw material media required for dust suppression into the supply box 1. A main output connector 12 is provided on the side of the supply box 1 for uniformly outputting the high-pressure dust suppression media generated after mixing and processing in the supply box 1. In order to achieve smooth long-distance transportation and uniform distribution of the media, a large-diameter main conveying pipe 13 is connected to the main output connector 12. The end of the main conveying pipe 13 away from the supply box 1 is connected to a distributor 14. The distributor 14 serves as a fluid hub, and its output end is connected to at least two sets of conveying branch pipes 15.

[0025] The hood assembly 2 has a semi-enclosed structure and is installed above the cutting arm or dust source of mining electromechanical equipment (such as tunneling machines or coal mining machines). Specifically, the hood assembly 2 includes an arc-shaped fixed hood 21, on which an arc-shaped distribution pipe 22 is fixedly installed on the inner arc surface or outer side. The conveying branch pipe 15 is connected between the distributor 14 and the arc-shaped distribution pipe 22 to synchronously divert the medium into the arc-shaped distribution pipe 22. Several foam nozzles 23 are radially distributed on the surface of the arc-shaped distribution pipe 22 along its arc direction. Around each foam nozzle 23, an air curtain nozzle 24 is coaxially sleeved. The air curtain nozzle 24 has symmetrical arc-shaped slots 25. In actual operation, the central foam nozzle 23 sprays foam, and the outer air curtain nozzles 24 spray high-speed air curtain. The air curtain forms a protective sleeve, effectively preventing the internal foam medium from being deflected due to interference from the negative pressure suction airflow underground.

[0026] It should be noted that the foam nozzle 23 forms an inner delivery channel, with its liquid inlet end directly penetrating and sealingly fixed to the wall of the arc-shaped distribution pipe 22, and communicating with the inner cavity of the arc-shaped distribution pipe 22 for delivering the main dust-suppressing foam medium. The air curtain nozzle 24 forms an outer delivery channel, coaxially covering the outside of the foam nozzle 23, and the tail end of the air curtain nozzle 24 contracts inward and is fixedly sealed to the outer wall of the foam nozzle 23, thereby forming an independent annular air cavity between the foam nozzle 23 and the air curtain nozzle 24. An air inlet connector is provided on the peripheral side of the air curtain nozzle 24 near the tail end, which connects to the annular air cavity. This air inlet connector is used to connect to an independent high-pressure air source branch.

[0027] In order to change the spray pattern of the air curtain in real time according to the dust concentration downhole, an adjustment component 3 is provided on the cover assembly 2 corresponding to the position of each air curtain nozzle 24. Specifically, the adjustment component 3 includes a fixing sleeve 31 coaxially sleeved on the air curtain nozzle 24 and fixed to the surface of the cover assembly 2. A protective cover 32 is provided around the fixing sleeve 31, and the protective cover 32 is fixed on the fixing sleeve 31 by two sets of fixing feet 321 arranged symmetrically above and below, thereby providing dustproof and guiding installation space for internal components.

[0028] Inside the protective cover 32, a bidirectional lead screw 35 is mounted between a set of vertically arranged fixed legs 321, and a guide slide rod 36 is fixedly mounted between another set of vertically arranged fixed legs 321. At the spray front end of the air curtain nozzle 24, two arc-shaped adjustment blocks 33 are symmetrically arranged vertically. Each adjustment block 33 has a sliding block 34 on both sides. The two adjustment blocks 33 are threaded to the bidirectional lead screw 35 through the sliding blocks 34, and are movably sleeved on the guide slide rod 36. When the bidirectional lead screw 35 rotates, the helical transmission causes the two adjustment blocks 33 to move in opposite directions or away from each other along the guide slide rod 36, which is limited to the vertical direction. This is to block or open the arc-shaped slot 25 on the air curtain nozzle 24, so as to adjust the size of the opening of the air curtain nozzle 24 and completely close it.

[0029] In order to overcome the shortcomings of traditional equipment that require individual adjustment of air curtain nozzles 24, resulting in response lag, this device is designed with a protective component 4 consisting of a sealing unit and a cleaning unit.

[0030] The enclosed unit includes a mounting frame 41 fixed to the back of the cover assembly 2. For each air curtain nozzle 24, the top of the bidirectional lead screw 35 is coaxially connected to an extension rod 42 extending upwards into the mounting frame 41. A worm gear 43 is fixed to the top of the extension rod 42, and multiple arrayed worm gears 43 are kept at the same horizontal height. A drive rod 44 is horizontally rotatable within the mounting frame 41. Several worms are fixed on the drive rod 44, each meshing with one of the worm gears 43 below. A manual turntable 45 is fixed to one end of the drive rod 44 extending out of the mounting frame 41. The operator only needs to rotate the manual turntable 45 at a single point to drive multiple sets of extension rods 42 and bidirectional lead screws 35 to rotate simultaneously through the synchronous transmission of the worm gears 43 and the aforementioned worms, achieving unified linkage adjustment of the large-span radially distributed adjustment components 3.

[0031] Furthermore, to address the issue of foam nozzle 23 clogging due to residual foam residue forming on the walls after shutdown, this embodiment integrates a position-triggered cleaning unit on the adjusting block 33. Specifically, an arc-shaped pipe 46 is embedded inside the upper adjusting block 33. Several cleaning nozzles 47 are embedded along the curvature of the arc-shaped pipe 46 on the bottom surface of the upper adjusting block 33, with the ends of the cleaning nozzles 47 flush with the bottom surface of the adjusting block 33 and pointing vertically downwards towards the foam nozzle 23. A mounting block 48 is fixed to the top of the upper adjusting block 33. A fixed-end air port 49 is vertically embedded within the mounting block 48, connecting downwards to the arc-shaped pipe 46. The other end of the fixed-end air port 49 extends through the side of the mounting block 48, and its air inlet moves vertically in sync with the upper adjusting block 33.

[0032] Correspondingly, a gas supply cavity 410 is horizontally fixed on the upper surface of the fixed sleeve 31. One end of the gas supply cavity 410 has an air outlet. An arc-shaped gas supply pipe 411 is also arranged on the cover assembly 2 to connect and deliver high-pressure cleaning gas to several gas supply cavities 410. The air outlet of the gas supply cavity 410 is tightly fitted with the side of the mounting block 48 to form a sliding valve.

[0033] When the equipment is in normal dust suppression operation, the adjusting block 33 is in the open position. At this time, the solid side wall of the mounting block 48 completely blocks and seals the air outlet of the air supply pipe 410, and the air path is blocked. The cleaning nozzle 47 does not work. When the dust suppression operation is stopped and the machine is shut down for storage, the operator rotates the manual turntable 45 in the opposite direction to drive the adjusting block 33 located above to close downwards. At the end of the stroke when the adjusting block 33 is about to fully close, the air inlet end of the fixed end air port 49 slides precisely downwards to connect with the air outlet of the air supply pipe 410. At this time, the air... With the air supply pipe 411 connected, the high-pressure cleaning gas in the air supply pipe 411 flows into the air supply chamber 410 and the fixed end air port 49 in sequence. After being diverted by the arc-shaped pipe 46, the high-pressure airflow is sprayed downward from several cleaning nozzles 47. This high-pressure airflow physically blows the end face of the foam nozzle 23, forcibly stripping away the residual foam liquid. As the adjusting block 33 continues to move downward until it is completely engaged and sealed, the cleaning air path is closed by misalignment, and the foam nozzle 23 is physically isolated. This not only completes the blowing and cleaning but also achieves dustproof self-sealing, ensuring that the pipeline is unobstructed during the next start-up operation.

[0034] Working Principle: During normal dust suppression operations in mines, the liquid foaming agent, water, or gaseous raw material required for dust suppression enters the supply box 1 through the inlet 11. After mixing, a high-pressure dust suppression medium is generated. This medium enters the large-diameter main conveying pipe 13 through the main output connector 12, flows through the distributor 14, and is simultaneously diverted by multiple sets of conveying branch pipes 15 into the arc-shaped distribution pipe 22 inside the arc-shaped fixed cover 21. Subsequently, the arc-shaped distribution pipe 22 distributes the medium to the radially distributed nozzles. The central foam nozzle 23 sprays dust suppression foam, while the outer air curtain nozzles 24 spray a high-speed air curtain. This high-speed air curtain forms a tubular protective sleeve around the foam jet, effectively preventing the internal foam medium from being deflected due to interference from the negative pressure suction airflow underground, thus ensuring the dust suppression coverage effect.

[0035] When changes in downhole conditions require real-time adjustment of the gas curtain injection pattern, the operator only needs to rotate the manual turntable 45 at a single point. The manual turntable 45 drives the drive rod 44 within the mounting frame 41 to rotate, and the worm gear on the drive rod 44 drives the arrayed worm wheels 43 to rotate synchronously. This rotational power is then transmitted to each set of bidirectional lead screws 35 via the extension rod 42. When the bidirectional lead screws 35 rotate, they utilize the helical transmission characteristics of the reverse thread to drive the sliding blocks 34 on both sides to move the upper and lower two arc-shaped adjustment blocks 33 vertically towards or away from each other along the guide slide rod 36. Through this purely mechanical single-point linkage, the opening size of the arc-shaped slots 25 at the front end of all gas curtain nozzles 24 can be controlled synchronously, allowing for rapid and uniform adjustment of the entire gas curtain pattern, overcoming the response lag problem caused by individual adjustments.

[0036] When the dust suppression operation is completed and the machine is ready to be shut down and stored, the operator reverses the manual turntable 45, and the linkage mechanism drives the upper and lower adjusting blocks 33 to close towards the center. At the end of the stroke when the upper adjusting block 33 is about to be fully closed, the air inlet of the fixed end air port 49 in the top mounting block 48 slides precisely downwards, connecting with the air outlet of the air supply pipe cavity 410 on the fixed sleeve 31. At this moment, the cleaning air path is instantly opened, and the high-pressure cleaning gas in the air supply pipe 411 flows into the air supply pipe cavity 410 and the fixed end air port 49 in sequence, enters the arc-shaped pipe 46 for diversion, and finally sprays high-pressure airflow downwards from several cleaning air nozzles 47 at the bottom. The high-pressure airflow physically blows the end face of the foam nozzle 23, forcibly removing the residual sticky foam liquid. As the adjusting block 33 continues to move downwards until it is completely engaged and closed, the sliding valve is offset to close the cleaning air path, and at the same time, the adjusting block 33 completely physically isolates the foam nozzle 23, which not only completes self-cleaning, but also achieves a tight dustproof seal, ensuring that the pipeline is unobstructed when the machine is started next time.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A mining electromechanical equipment for suppressing dust, characterized in that, include: The supply box (1) is located on one side of the equipment and is used to store and output the dust suppression medium; The cover assembly (2) is connected to the supply box (1) and is set above the dust source to cover the work outline. It is provided with a foam nozzle (23) and a coaxially sleeved air curtain nozzle (24). An adjustment component (3) is provided on the cover assembly (2) for adjusting the opening size of the air curtain nozzle (24) and closing it when not in use; The protective component (4) is disposed on the cover assembly (2) and the adjustment assembly (3), including a sealing unit and a cleaning unit. The sealing unit is used to adjust the adjustment assembly (3) in conjunction with the adjustment assembly (3), and the cleaning unit is used to trigger air supply during the sealing process of the adjustment assembly (3) to blow and clean the surface of the foam nozzle (23).

2. The mining electromechanical equipment for suppressing dust according to claim 1, characterized in that: The adjustment component (3) includes a fixed sleeve (31), a protective cover (32) and a fixed support (321). The fixed sleeve (31) is coaxially sleeved on the air curtain nozzle (24) and fixed on the surface of the cover assembly (2). The protective cover (32) is arranged around the fixed sleeve (31). Two sets of fixed supports (321) are arranged symmetrically on the top and bottom. The protective cover (32) is fixed on the fixed sleeve (31) through the fixed supports (321) to provide dust protection and guide installation space.

3. The mining electromechanical equipment for suppressing dust according to claim 2, characterized in that: The adjustment assembly (3) further includes a bidirectional lead screw (35), a guide slide rod (36), an adjustment block (33), and a sliding block (34). The bidirectional lead screw (35) is bearing between one set of vertically arranged fixed legs (321), and the guide slide rod (36) is fixedly arranged between another set of vertically arranged fixed legs (321). The adjustment block (33) is arc-shaped and symmetrically arranged in two. The sliding block (34) is arranged on the adjustment block (33). The two adjustment blocks (33) are respectively threaded to the bidirectional lead screw (35) through the sliding block (34) on them, and are movably sleeved on the guide slide rod (36). The bidirectional lead screw (35) and the two sets of sliding blocks (34) cooperate to form a helical transmission assembly, which is used to convert the rotational motion into the two adjustment blocks (33) moving in opposite or opposite directions along the guide slide rod (36) in a vertical direction only, thereby adjusting the opening size and closing state of the air curtain nozzle (24).

4. The dust suppression mining electromechanical equipment according to claim 3, characterized in that: The enclosed unit includes a mounting frame (41), several extension rods (42), worm gears (43), a drive rod (44), and a manual turntable (45). The mounting frame (41) is fixed on the cover assembly (2). The bottom end of the extension rod (42) is coaxially connected to the bidirectional lead screw (35) and extends upward into the mounting frame (41). The worm gear (43) is fixed at one end of the extension rod (42) within the mounting frame (41), and the multiple worm gears (43) are kept flush. The drive rod (44) is horizontally rotatably disposed within the mounting frame (41), and several worms are fixed on it. The manual turntable (45) is fixed at one end of the drive rod (44) extending out of the mounting frame (41). The multiple worms on the drive rod (44) mesh with the multiple worm gears (43) to form a synchronous transmission cooperation, which is used to synchronously transmit the input rotation of the manual turntable (45) to multiple sets of extension rods (42) and the bidirectional lead screw (35).

5. A dust-suppressing mining electromechanical equipment according to claim 3, characterized in that: The cleaning unit includes an arc-shaped pipe (46), a cleaning nozzle (47), a mounting block (48), and a fixed-end air port (49). The arc-shaped pipe (46) is embedded in the upper adjusting block (33). Several cleaning nozzles (47) are arranged along the arc direction of the arc-shaped pipe (46), and are embedded in the bottom surface of the corresponding adjusting block (33) and flush with it, for blowing downwards. The mounting block (48) is fixed on the upper adjusting block (33). The fixed-end air port (49) is vertically embedded in the mounting block (48) and connected to the arc-shaped pipe (46). One end of the fixed-end air port (49) passes through the side of the mounting block (48) and moves vertically synchronously with the adjusting block (33).

6. A dust-suppressing mining electromechanical equipment according to claim 5, characterized in that: The cleaning unit also includes an air supply cavity (410) and an air supply pipe (411). The air supply cavity (410) is horizontally fixed on the upper surface of the fixed sleeve (31) and has an air outlet at one end. The air supply pipe (411) is arc-shaped and is set on the cover assembly (2), connecting several air supply cavities (410) to supply air to them. The air outlet of the air supply cavity (410) is in contact with the side of the mounting block (48). In the initial state, the air outlet is blocked and closed by the mounting block (48). When the adjusting block (33) closes to the center to close the opening of the air curtain nozzle (24), one end of the fixed end air port (49) gradually slides to connect with the air outlet and is used to trigger the high-pressure airflow to rush into the arc-shaped pipe (46) for physical cleaning.

7. A dust-suppressing mining electromechanical equipment according to claim 1, characterized in that: The cover assembly (2) includes an arc-shaped fixed cover (21) and an arc-shaped distribution pipe (22). The arc-shaped fixed cover (21) is set above the cutting arm or dust source of the mining electromechanical equipment and is used as the mounting base for each group of foam nozzles (23). Its arc-shaped structure conforms to the working contour of the cutting head. The arc-shaped distribution pipe (22) is fixedly set on the arc-shaped fixed cover (21).

8. A dust-suppressing mining electromechanical equipment according to claim 7, characterized in that: The cover assembly (2) also includes the air curtain nozzle (24), the arc-shaped slot (25) and the foam nozzle (23). Several foam nozzles (23) are radially distributed along the arc direction of the arc distribution pipe (22) to form a semi-enclosed dust curtain in conjunction with the sprayed foam medium. The air curtain nozzle (24) is coaxially sleeved on the corresponding foam nozzle (23). The arc-shaped slot (25) is symmetrically opened on the air curtain nozzle (24). The air curtain nozzle (24) is used to spray out the outer airflow to protect the inner foam medium from the interference of the external negative pressure suction airflow.

9. A dust-suppressing mining electromechanical equipment according to claim 1, characterized in that: The supply box (1) includes an inlet (11) and a main output connector (12). The inlet (11) is located on the supply box (1) and is used to replenish the liquid or gaseous raw material medium required for dust suppression inside the supply box (1). The main output connector (12) is located on the side of the supply box (1) and is used to uniformly output the dust suppression medium after mixing and processing inside the supply box (1) to the downstream pipeline.

10. A dust-suppressing mining electromechanical equipment according to claim 9, characterized in that: The output end of the supply box (1) is also connected to a main delivery pipe (13), a distributor (14) and a delivery branch pipe (15). The main delivery pipe (13) is connected to the main output connector (12) and is used to guide the dust-suppressing medium output from the supply box (1) as the main stream. The distributor (14) is connected to the end of the main delivery pipe (13) away from the supply box (1) and is used to distribute the single-path medium flow into multiple branches as needed. The delivery branch pipe (15) has at least two sets and is connected between the distributor (14) and the cover assembly (2) and is used to synchronously divert the delivered dust-suppressing medium to each set of air curtain nozzles (24).

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