A dust collecting device for a wet grinding station for hub polishing

Abstract

The utility model discloses a kind of wet type grinding and dressing table dust collecting equipment for hub grinding, comprising: rack, workbench and dust hood are provided on rack, workbench is used to place the hub needing grinding and dressing, workbench is opened with lower suction port, the lower end of dust hood is formed with lower dust collection cavity, lower suction port is communicated with lower dust collection cavity, the lower end of lower suction port is provided with the first spray water curtain arranged in lower dust collection cavity, the lower end of first spray water curtain is provided with PP ball filter screen, for filtering dust in water, the lower end of PP ball filter screen is provided with water collecting tank, water collecting tank is provided with drain, drain is connected with outdoor water pool;By the above mode, the utility model can be immediately dampened by spray water curtain at source head, multi-stage efficient filtration collects dust, and with the aid of intelligent monitoring system ensures equipment safe operation, to fundamentally eliminate dust explosion risk while realizing clean production.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial dust control equipment, and in particular to a wet grinding table dust collection device for wheel hub grinding. Background Technology

[0002] In the machining of metal products such as wheel hubs, grinding and finishing (refinishing) are essential processes. This process generates a large amount of fine aluminum-magnesium alloy dust. This type of dust is lightweight and easily suspended in the air. Long-term inhalation by workers can cause serious occupational health hazards to the respiratory system and other systems, making it a strictly controlled hazardous dust under national occupational health regulations. Furthermore, when the aluminum powder suspended in the air reaches a certain concentration, it poses a significant explosion hazard, creating serious safety risks in the grinding work environment.

[0003] Currently, the industry commonly uses traditional centralized dust collection systems to handle this type of dust. These systems typically connect multiple indoor grinding stations to outdoor dry or wet central dust collection equipment via complex piping networks. However, this technical solution has several inherent drawbacks: First, dust easily accumulates inside the long transport pipes, making daily observation and thorough cleaning difficult, creating a hidden explosion source and posing a significant safety risk. Second, the system is costly to maintain and cumbersome to operate. For example, filter cartridges in dry systems require regular replacement and cleaning, a process that can easily lead to secondary dust dispersion; and any maintenance or cleaning step can cause the entire system to shut down, severely impacting production efficiency. Furthermore, in practice, the overall recovery efficiency of such centralized dust collection systems is limited, with a large amount of fine dust still failing to be effectively captured and being emitted into the external environment, causing pollution. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a dust collection device for a wet grinding table for wheel hub grinding, which can instantly wet and suppress explosions at the source through spray water curtain, collect dust through multi-stage high-efficiency filtration, and ensure safe operation of the equipment with the help of an intelligent monitoring system, thereby fundamentally eliminating the risk of dust explosion while achieving clean production.

[0005] To solve the above-mentioned technical problems, the present invention provides a wet grinding table dust collection device for wheel hub grinding, comprising: a frame, a workbench and a dust collection hood on the frame, the workbench for placing the wheel hub to be ground, the workbench having a lower suction port, the lower end of the dust collection hood forming a lower dust collection chamber, the lower suction port communicating with the lower dust collection chamber, a first spray water curtain arranged in the lower dust collection chamber below the lower suction port, the lower suction port for sucking the dust generated during wheel hub grinding into the lower dust collection chamber and contacting it with the first spray water curtain to wet and suppress the dust, a PP ball filter screen is arranged below the first spray water curtain for filtering dust in the water, a water collection tank is arranged below the PP ball filter screen, the water collection tank having a drain outlet connected to an outdoor water tank.

[0006] Preferably, the dust collection hood has a side dust collection chamber formed inside, which is close to the workbench. The side dust collection chamber is provided with a side air intake facing the side of the workbench. A second spray water curtain is provided at the upper end of the side dust collection chamber. The side air intake is used to draw some of the dust generated by grinding the wheel hub into the side dust collection chamber and make it contact the second spray water curtain to wet and suppress the explosion of the dust. The side dust collection chamber is connected to the lower dust collection chamber.

[0007] Preferably, a water mist chamber is formed inside the dust collection hood. The water mist chamber is located above and connected to the lower dust collection chamber. The water mist chamber is used to guide and buffer the water mist mixed with dust in the lower dust collection chamber. An air extraction chamber is connected above the water mist chamber. A fine dust filter is provided between the water mist chamber and the air extraction chamber. The fine dust filter is used to filter the dust in the water mist.

[0008] Preferably, an explosion-proof axial flow fan is installed in the extraction chamber, and the gas in the extraction chamber is discharged through the explosion-proof axial flow fan.

[0009] Preferably, a silencer is installed in the air extraction chamber, and the gas in the air extraction chamber is discharged through the silencer under the action of the explosion-proof axial flow fan.

[0010] Preferably, a hydrogen detector is installed inside the extraction chamber.

[0011] Preferably, a differential pressure gauge is installed on the dust collection hood to monitor the pressure status inside the extraction chamber.

[0012] Preferably, it also includes a water inlet valve, which is connected to a flow meter via a water pipe. The flow meter is connected to a dust collection hood via a water pipe, thereby supplying water to the first and second spray water curtains.

[0013] The beneficial effects of this utility model are as follows: By integrating downward and side suction, a three-dimensional encircling collection system for dust sources is formed, ensuring that dust has nowhere to escape; its core first and second spray water curtain designs can multi-wet the dust at its source and along its diffusion path, fundamentally changing the physical state of aluminum-magnesium dust, rendering it non-explosive and achieving intrinsic safety; the multi-stage filtration system, including PP ball filters and fine dust filters, ensures an extremely high dust capture rate, ensuring that the emitted gas meets strict environmental standards while protecting the occupational health of operators; the integrated single-unit design eliminates the complex pipeline network, completely eliminating the major safety hazard of dust accumulation in pipelines, and making the equipment layout flexible and maintenance simple; the integrated intelligent control system, through real-time monitoring and linkage control of key parameters such as water flow, pressure difference, and hydrogen concentration, constructs a comprehensive safety protection system, realizes predictive maintenance and fault early warning, and ensures long-term stable and reliable operation of the equipment. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a side view of the present invention.

[0015] The components in the attached diagram are labeled as follows: 1. Workbench; 11. Downward air intake; 2. Dust collection hood; 21. Lower dust collection chamber; 22. Side suction chamber; 221. Side suction vent; 23. Water mist chamber; 24. Exhaust chamber; 3. First spray water curtain; 4. PP ball filter screen; 5. Water collection tank; 51. Drain outlet; 6. Second spray water curtain; 7. Fine dust filter; 81. Explosion-proof axial flow fan; 82. Silencer; 83. Hydrogen detector; 84. Differential pressure gauge; 85. Inlet valve; 86. Flow meter; 87. Explosion-proof electrical cabinet; 9. Wheel hub. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise specified, physical quantities in formulas should be understood as basic quantities of SI base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0023] Example: refer to Figure 1 and Figure 2A wet grinding table dust collection device for wheel hub grinding includes: a frame, on which a workbench 1 and a dust collection hood 2 are mounted. The workbench 1 is used to place the wheel hub 9 to be ground, thus facilitating the grinding of the wheel hub 9 by the operator. The workbench 1 has a lower suction port 11. The lower end of the dust collection hood 2 forms a lower dust collection chamber 21, and the lower suction port 11 is connected to the lower dust collection chamber 21. Thus, the dust generated during the grinding of the wheel hub 9 falls through the lower suction port 11 and into the dust collection hood 2. Below the lower suction port 11, a first spray water curtain 3 is installed in the lower dust collection chamber 21. The first spray water curtain 3 can be a cyclone spray water curtain, which can form a fan-shaped rotating water curtain with a wide coverage and fine water particles on the cross-section of the lower dust collection chamber 21. The lower suction port 11 is used to draw the dust generated during the grinding of the wheel hub 9 into the lower dust collection chamber 21 and into contact with the first spray water curtain 3 to wet and suppress the explosion of the dust. When the dust-laden airflow is drawn in by negative pressure and passes through the first spray water curtain 3, the dust particles and water droplets undergo violent inertial collisions, interception, and agglomeration effects, and most of the dust is rapidly wetted and becomes heavier. Below the first spray water curtain 3, a PP ball filter 4 is arranged. The PP ball filter 4 is installed in the lower dust collection chamber 21 to filter dust. The gas-liquid mixture, after preliminary purification by the first spray water curtain 3, continues to descend, passing through the PP ball filter 4 below. The PP ball filter 4 is composed of a large number of hollow PP balls. Its surface area and complex pore structure can further trap and adsorb residual dust mixed in the water vapor, and play a homogenizing and buffering role for the water flow. Below the PP ball filter 4, a water collection tank 5 is arranged at the bottom of the lower dust collection chamber 21, i.e., the bottom of the dust collection hood 2. The water collection tank 5 has a drain outlet 51, which is connected to an outdoor water tank. The first spray water curtain 3 of the cyclone spray system forms a fan-shaped water curtain during spraying. Large dust particles in the dust fall together with the water curtain into the water collection tank 5. During the falling process, the water is filtered by the PP ball filter screen 4. The filtered water is discharged outdoors for treatment through the water collection tank 5. Through the action of the lower air intake 11, the first spray water curtain 3, and the PP ball filter screen 4, efficient capture and immediate forced wetting of the dust generated by grinding are achieved at the source. This changes the physical properties of dry aluminum-magnesium dust, fundamentally eliminating the risk of it flying and accumulating inside the equipment and causing an explosion. At the same time, this multi-stage treatment ensures that most of the dust is effectively intercepted after mixing with water, completing the initial purification of the airflow and the primary filtration of wastewater, laying the foundation for subsequent treatment.

[0024] refer to Figure 1 and Figure 2To further capture fine dust that may escape from the workbench 1 or be suspended in the worker's breathing zone, a side suction chamber 22 is formed inside the dust collection hood 2, close to the workbench 1. The side suction chamber 22 is equipped with a side air intake 221 facing the side of the workbench 1. A second spray water curtain 6 is installed at the upper end of the side suction chamber 22. The side air intake 221 is used to draw the horizontally diffused dust generated by grinding the wheel hub 9 into the side suction chamber 22 and make it contact the second spray water curtain 6. Its function is to converge with the dust-laden airflow drawn in by the side suction port 221. Light and fine dust that cannot be captured in time by the lower suction port 11 enters the side suction chamber 22 under the guidance of the side suction force, and immediately encounters the water mist formed by the second spray water curtain 6 for secondary wetting and capture. The side suction chamber 22 is connected to the lower suction chamber, and the treated dust-laden water flows downward into the lower dust collection chamber 21 under gravity, and together they pass through the PP ball filter 4 and enter the water collection tank 5. Through cooperation with the main lower suction channel, a three-dimensional surrounding collection of dust-generating areas is formed, significantly reducing the suspended dust concentration in the surrounding air of the working area, further protecting the occupational health of operators, improving overall dust collection efficiency, and eliminating collection dead zones.

[0025] refer to Figure 1 and Figure 2 A water mist chamber 23 is formed inside the dust collection hood 2. The water mist chamber 23 is arranged above and connected to the lower dust collection chamber 21. After the main dust removal process is completed, the airflow carrying a small amount of extremely fine water mist and possibly escaped extremely fine dust rises into the water mist chamber 23 located above the lower dust collection chamber 21. The water mist chamber 23 is used to guide and buffer the water mist mixed with dust in the lower dust collection chamber 21. In particular, the first spray water curtain 3 of the cyclone spray will form a rotating water curtain or fine water mist. Sufficient settling and inertial separation opportunities can be obtained in the water mist chamber 23, so that the gas and liquid phases have more sufficient contact and time for final separation. Above the water mist chamber 23 is a suction chamber 24. A fine dust filter 7 is arranged between the water mist chamber 23 and the suction chamber 24. The fine dust filter 7 is installed in the water mist chamber 23 and is used to trap submicron-sized dust particles and some dust-laden droplets that were not completely removed in the aforementioned process, ensuring the cleanliness of the final discharged gas. Fine filtration ensures the cleanliness of the discharged gas, meeting stringent environmental emission standards. At the same time, this process further reduces any potential dust emission risks at the end of the equipment.

[0026] refer to Figure 1 and Figure 2An explosion-proof axial flow fan 81 is installed at the end of the extraction chamber 24. This fan provides stable negative pressure suction for the entire dust collection equipment and is a key power source ensuring sufficient wind speed at each suction port. Gas within the extraction chamber 24 can be discharged through the explosion-proof axial flow fan 81. To reduce noise during discharge and meet environmental noise requirements, a silencer 82 is also installed in the extraction chamber 24. Air within the extraction chamber 24 is discharged through the silencer 82 under the action of the explosion-proof axial flow fan 81. The selection of the explosion-proof axial flow fan 81 fundamentally solves the safety hazard of the power source potentially becoming an ignition source, while the addition of the silencer 82 significantly reduces equipment operating noise, protects the hearing health of operators, and ensures that the equipment meets safety and environmental protection requirements while also considering the needs of a humanized working environment.

[0027] refer to Figure 1 and Figure 2 The machine is also equipped with an explosion-proof electrical cabinet 87. The equipment is controlled by a PLC and is also equipped with an audible and visual alarm device that is electrically connected to the PLC.

[0028] refer to Figure 1 and Figure 2 Considering that aluminum-magnesium alloy dust may undergo a chemical reaction and release hydrogen gas during prolonged contact with water in a wet environment, a hydrogen detector 83 is installed in the extraction chamber 24. The hydrogen detector 83 is electrically connected to the explosion-proof electrical cabinet 87. The hydrogen detector 83 monitors the hydrogen volume concentration in the purified gas in real time and transmits the signal to the PLC in the explosion-proof electrical cabinet 87. The system is set so that when the detected value exceeds the safety threshold (e.g., <100ppm), the PLC will immediately activate the linkage control, trigger an audible and visual alarm, and execute safety commands such as equipment shutdown according to the preset program. This provides active monitoring and protection against the unique chemical risks of wet treatment of aluminum-magnesium dust, effectively warning against and preventing the explosion risk caused by hydrogen accumulation. It fills another safety dimension beyond conventional dust explosion protection, making the safety design of the equipment more comprehensive and reliable.

[0029] refer to Figure 1 and Figure 2A differential pressure gauge 84 is installed on the dust collection hood 2 to monitor the pressure state within the extraction chamber 24. Its two ends are connected to the front and rear of the fine dust filter 7 or equivalent measurement points, respectively. The upper differential pressure gauge 84 is electrically connected to the explosion-proof electrical cabinet 87. The PLC reads the differential pressure data in real time. When the differential pressure is lower than the set value, it may indicate insufficient airflow from the explosion-proof axial flow fan 81, leading to a decrease in the suction effect. When the differential pressure is higher than the set value, it usually indicates that the fine dust filter 7 needs cleaning or replacement. Once the monitored value exceeds the safe operating range, the PLC will trigger an alarm or even shut down the machine. This non-contact, continuous online monitoring of the system's core operating status allows for timely detection of potential problems such as abnormal airflow or filter blockage, preventing the equipment from operating in an inefficient or unsafe state. This is a crucial monitoring measure for achieving predictive maintenance and ensuring the long-term stable, safe, and efficient operation of the equipment.

[0030] refer to Figure 1 and Figure 3 The system also includes an inlet valve 85, which is connected to a flow meter 86 via a water pipe. The flow meter 86 is connected to the dust collection hood 2 via a water pipe, thus supplying water to the first spray water curtain 3 and the second spray water curtain 6. The inlet valve 85 controls the on / off of the total water supply, while the flow meter 86 is connected in series after the inlet valve 85 to accurately measure and provide real-time feedback on the instantaneous flow rate of water entering the dust collection hood 2 to supply the first spray water curtain 3 and the second spray water curtain 6. This flow signal is sent to the PLC, and the system has a minimum flow alarm value. If the flow rate is lower than this value, it indicates that the spray system may have insufficient water supply, pipe blockage, or water pump failure, which will directly affect the wetting and explosion suppression effect, and the PLC will issue an alarm accordingly. Through precise monitoring of the spray water flow, the continuous, stable, and sufficient operation of the spray water curtain is ensured, guaranteeing the basic conditions for effective dust wetting from the source. It upgrades the water system from a simple open-loop supply to closed-loop monitoring, which is a key link in ensuring that the equipment is always in a safe working state.

[0031] Operating Process: After the equipment starts up, the PLC control system integrated in the explosion-proof electrical cabinet 87 is powered on, and each monitoring unit initializes. The water supply system starts, the inlet valve 85 opens, and the flow meter 86 monitors in real time to ensure that the water flow to the first spray water curtain 3 and the second spray water curtain 6 is stable and sufficient. At the same time, the explosion-proof axial flow fan 81 in the exhaust chamber 24 starts to run, forming a stable negative pressure environment inside the entire dust collection hood 2.

[0032] When the operator grinds the wheel hub 9 on the workbench 1, the generated dust is captured mainly through two paths. The primary path is downward suction: most of the heavier dust is drawn into the lower dust collection chamber 21 through the downward suction port 11 of the workbench 1 under negative pressure, and immediately collides violently with the high-speed rotating fan-shaped water curtain formed by the first spray water curtain 3. The dust is quickly wetted by water particles, increases in weight, and loses its explosiveness. The auxiliary path is side suction: some of the lighter, dispersed dust is captured by the side suction port 221 of the side suction chamber 22, and meets the second spray water curtain 6 in the chamber for secondary wetting. These two dust-laden airflows eventually merge, and the gas-liquid mixture passes downward through the PP ball filter screen 4 under the action of gravity. This filter screen further intercepts and adsorbs the residual dust particles and homogenizes the water flow. The captured dust and water flow together into the bottom water collection tank 5, and are discharged to the outdoor water treatment system for recycling through the drain outlet 51.

[0033] The humid airflow, after undergoing the aforementioned treatment, continues to rise and enters the water mist chamber 23. Here, the airflow velocity decreases and its direction changes, providing a final opportunity for the inertial separation of the gas and liquid phases. Subsequently, the airflow must pass through the fine dust filter 7, which ensures that any residual fine dust and water vapor are effectively trapped, thus the gas flowing through the fine dust filter 7 becomes clean air.

[0034] The clean gas finally enters the extraction chamber 24, and under the power of the explosion-proof axial flow fan 81, it is discharged into the atmosphere after being reduced in noise by the silencer 82.

[0035] Throughout the entire operation, the safety monitoring system operates continuously. The hydrogen detector 83 monitors the hydrogen concentration in the purified gas in real time; the differential pressure gauge 84 continuously monitors the pressure difference before and after the filter to determine if the airflow is sufficient and if the filter is clogged; and the flow meter 86 continuously verifies the normal supply of spray water. All these monitoring signals are transmitted to the PLC in real time. If any parameter exceeds the preset safety threshold, the PLC will immediately trigger an audible and visual alarm and automatically execute a shutdown command according to a preset program to ensure the safety of personnel and equipment.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dust collection device for a wet grinding table used for wheel hub grinding, characterized in that, include: The machine frame is provided with a workbench (1) and a dust collection hood (2). The workbench (1) is used to place the wheel hub (9) to be ground. The workbench (1) has a lower suction port (11). The lower end of the dust collection hood (2) forms a lower dust collection chamber (21). The lower suction port (11) is connected to the lower dust collection chamber (21). Below the lower suction port (11) is a first spray water curtain (3) arranged in the lower dust collection chamber (21). The air vent (11) is used to draw the dust generated by grinding the wheel hub (9) into the lower dust collection chamber (21) and make it contact the first spray water curtain (3) to wet and suppress the explosion of the dust. A PP ball filter screen (4) is provided below the first spray water curtain (3) to filter the dust in the water. A water collection tank (5) is provided below the PP ball filter screen (4). The water collection tank (5) is provided with a drain outlet (51) and the drain outlet (51) is connected to an outdoor water pool.

2. The dust collection device for a wet grinding table for wheel hub grinding according to claim 1, characterized in that: The dust collection hood (2) has a side dust collection chamber (22) formed inside, which is close to the workbench (1). The side dust collection chamber (22) is provided with a side air intake (221) facing the side of the workbench (1). A second spray water curtain (6) is provided at the upper end of the side dust collection chamber (22). The side air intake (221) is used to suck some of the dust generated by grinding the wheel hub (9) into the side dust collection chamber (22) and contact it with the second spray water curtain (6) to wet and suppress the explosion of the dust. The side dust collection chamber (22) is connected to the lower dust collection chamber.

3. The dust collection device for a wet grinding table for wheel hub grinding according to claim 2, characterized in that: A water mist chamber (23) is formed inside the dust collection hood (2). The water mist chamber (23) is located above and connected to the lower dust collection chamber (21). The water mist chamber (23) is used to guide and buffer the water mist mixed with dust in the lower dust collection chamber (21). An air extraction chamber (24) is connected above the water mist chamber (23). A fine dust filter (7) is provided between the water mist chamber (23) and the air extraction chamber (24). The fine dust filter (7) is used to filter the dust in the water mist.

4. The dust collection device for a wet grinding table for wheel hub grinding according to claim 3, characterized in that: An explosion-proof axial flow fan (81) is installed in the air extraction chamber (24), and the gas in the air extraction chamber (24) is discharged through the explosion-proof axial flow fan (81).

5. The dust collection device for a wet grinding table for wheel hub grinding according to claim 4, characterized in that: A silencer (82) is provided in the air extraction chamber (24), and the gas in the air extraction chamber (24) is discharged through the silencer (82) under the action of the explosion-proof axial flow fan (81).

6. A dust collection device for a wet grinding table for wheel hub grinding according to claim 4 or 5, characterized in that: A hydrogen detector (83) is installed inside the extraction chamber (24).

7. A dust collection device for a wet grinding table for wheel hub grinding according to claim 4 or 5, characterized in that: A differential pressure gauge (84) is installed on the dust collection hood (2) to monitor the pressure state inside the air extraction chamber (24).

8. The dust collection device for a wet grinding table for wheel hub grinding according to claim 2, characterized in that: It also includes a water inlet valve (85), which is connected to a flow meter (86) via a water pipe. The flow meter (86) is connected to a dust collection hood (2) via a water pipe, thereby supplying water to the first spray water curtain (3) and the second spray water curtain (6).

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