A gas purification disk and a gas purification device

Abstract

A gas purification disk, comprising a first disk, a second disk and spokes. The first disk is provided with a hole connected to a rotary drive device, and the rotation axis of the first disk coincides with the rotation axis of the second disk; the first disk and the second disk are detachably connected together; wherein the first disk is provided with an annular retaining surface, and the rotation axis of the retaining surface coincides with the rotation axis of the first disk; the spokes have a stop surface. When the gas purification disk of the present invention is in use, it is convenient to install, has no solder joints, has no stress inside the spokes, has a high filtration efficiency, a small wind resistance, a small power, and a low energy consumption.

Description

Technical Field

[0001] The present invention relates to a gas purification disk, particularly a purification disk for removing liquid droplets or solid particles in a gas. Technical Background

[0002] With the increasing development of the economy, people have higher and higher requirements for the air quality of the environment. On the one hand, the air quality requirements for the living environment have increased, and the kitchen fumes will have a very great impact on the entire family environment; on the other hand, the air quality requirements for the natural environment have also increased, and the increase in atmospheric PM2.5 has attracted wide social attention.

[0003] Kitchen fumes, on the one hand, harm the respiratory health of family members, and on the other hand, after being discharged into the atmosphere, they will generate aerosols and increase the PM2.5 index; a large amount of emissions will seriously affect the air quality.

[0004] There are a variety of existing kitchen flue gas treatment devices. For example, traditional ones include electrostatic adsorption devices, but traditional electrostatic adsorption devices have serious defects, with poor effects and low efficiency. There are also some range hoods that directly suck the air in the kitchen through negative pressure and filter the fumes through a filter screen. This method cannot completely remove the fumes.

[0005] In recent years, a mechanical fume removal device has emerged. The mechanical fume removal device is provided with a suction fan at the upper part to suck the flue gas upward, and a gas purification disk is arranged below the suction fan. The gas purification disk is provided with a plurality of spokes. The gas purification disk rotates during purification. When the air with fumes is sucked by the negative pressure of the suction fan, the air with fumes will pass through the gas purification disk; the spokes on the gas purification disk rotate at high speed, collide with the fume droplets or other particles in the air, and the fume droplets or other particles will adhere to the spokes. Under the action of the spokes, the movement direction is changed, and they move tangentially along the spokes, and then finally move to the outer periphery of the purification disk and strike on the inner wall of the purifier and finally slide down for collection.

[0006] There are some problems with the existing mechanical fume removal devices: 1. The spokes are fixed to the gas purification disk by welding, which brings some obvious defects. First, when the spokes are welded to the hub of the gas purification disk, since welding is a connection method that requires heating, after cooling, both the spokes made of metal and the gas purification disk will undergo a certain degree of deformation, thus affecting the shape of the gas purification disk; second, since the hub of the gas purification disk and the spokes are connected by welding, the spokes will undergo a certain degree of deformation. In order to limit the deformation of the gas purification disk caused by this, the gas purification disk needs to have an outer ring to fix the spokes (see Figure 1); Third, since the spokes are welded to the hub, once the solder joints become loose, the spokes may fall off and shoot out at high speed during high-speed rotation, causing personal injury. 2. Difficult spoke welding. When the spokes are welded to the wheel spokes, they need to be evenly distributed on the wheel spokes, which requires the design of a separate fixture to clamp the spokes and the hub; in addition, there are many small solder joints, making welding difficult. 3. The shape of the spokes is single, mainly circular, and some are of other shapes. Circular spokes are easy to install, but the product of the diameter and the number is limited by the diameter of the hub. To improve the purification efficiency, it is necessary to increase the rotation speed of the gas purification disk, which places higher requirements on the rotation speed of the entire gas purification disk. 4. Due to the shape of the spokes, the wind resistance of the gas purification disk is relatively large. To provide sufficient negative pressure, a more powerful exhaust fan is required, which will lead to an increase in the cost, volume, and noise of the mechanical oil fume removal device. 5. Once the spokes are deformed, the gaps between the spokes will change. Due to the change in the spoke gaps, some gases will not have the oil droplets, oil mists, and other solid particles removed after passing through the gas purification disk, and will still cause pollution to the atmosphere.

[0007] Chinese Patent Document No. CN109794102A discloses a gas purification unit, including a central disk and at least six spokes. The spokes are arranged in a radially outwardly extending manner on the central disk. The inner ends of the spokes are fixed to the central disk. The central disk is connected to a driving device for driving its rotation. At least one concave guiding groove is provided on one side of the rotation direction of the spokes.

[0008] The above patent documents respectively provide gas purification disks in different forms, but all face the problems mentioned above. The technical solution provided by the present invention can achieve the following technical effects:

[0009] 1. The spokes of the gas purification disk of the present invention do not need to be connected to the hub by welding, which is convenient for installation and has no safety hazards; the spokes are connected to the hub of the gas purification disk by a clamping method, without the need for a fixture to fix, and there are no solder joints. The gas purification disk is convenient to process, safe and reliable to use;

[0010] 2. The spokes of the gas purification disk of the present invention do not need to be connected to the hub by welding, the spokes have no internal stress, and the gas purification disk has a long service life.

[0011] 3. The shape of the spokes of the gas purification disk of the present invention improves the purification efficiency of the spokes. When the number of spokes is the same, the purification efficiency of the gas purification disk is greatly improved.

[0012] 4. The rotation speed of the gas purification disk of the present invention is relatively low, the equipment cost is low, and the energy-saving effect is good.

[0013] 5. During the actual use of the gas purification disk of the present invention, it has a small air resistance and a good filtering effect. Under the condition of the same filtering effect, the equipment cost is effectively reduced. Summary of the Invention

[0014] The present invention provides a gas purification disk, including a first disk, a second disk and spokes. A hole connected to a rotation driving device is provided on the first disk, and the rotation axis of the first disk coincides with the rotation axis of the second disk; the first disk and the second disk are detachably connected together; wherein an annular bearing surface is provided on the first disk, and the rotation axis of the bearing surface coincides with the rotation axis of the first disk; the spokes have a stop surface.

[0015] The cross-sectional shape of the spokes is the same along the direction of the spoke center line. The spokes are formed with a first surface and a second surface. The intersection line formed by the first surface and the plane perpendicular to the center line of the spoke is the first intersection line, and this first intersection line is in the shape of a function curve; wherein the second surface forms a second intersection line with the plane perpendicular to the center line of the spoke.

[0016] The first intersection line has a protrusion formed by the intersection of a first curve segment and a second curve segment. The intersection point of the first curve segment and the second curve segment is at a vertical distance from the center line of the spoke in the plane perpendicular to the spoke greater than the vertical distance of other points on the first intersection line from the center line of the spoke.

[0017] The bearing surface is a cylindrical surface, a conical surface or a rotating surface of a function curve; the stop surface corresponds to the shape of the bearing surface.

[0018] It further includes a plurality of fixing blocks arranged along the circumference of the hub. Grooves are formed between adjacent fixing blocks; the spokes are installed in the grooves.

[0019] The ratio of the dimension in the thickness direction to the dimension in the width direction of the spokes is 1:1.2 to 4, preferably 1:2; the size of the groove is adapted to the size of the spokes.

[0020] The plurality of fixing blocks are integrally formed with the first disk or the plurality of fixing blocks are fixed by a fixing ring.

[0021] An interference fit is formed between the spokes and the fixing blocks.

[0022] The bearing surface, the spokes and the fixing device are arranged between the first disk and the second disk, and the first disk and the second disk are fixed by a fastening device.

[0023] A gas purification device includes a driving device and the gas purification disk of the present invention.

[0024] Through the above technical solutions, the present invention reduces the air resistance of the gas purification disk, and can connect the spokes and the hub without using welding, thereby reducing the overall cost of the equipment and improving the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 showing the gas purification disk in the prior art for welding;

[0026] Figure 2 showing a schematic diagram of the gas purification disk of the present invention;

[0027] Figure 3 showing a schematic diagram of the gas purification disk of the present invention after removing the second disk (or the first disk);

[0028] Figure 4 showing a front view of the spoke of the present invention;

[0029] Figure 5 showing Figure 3 a partial enlarged view of the spoke;

[0030] Figures 6 - 7 showing a schematic cross-sectional view of the spoke;

[0031] Figure 8 showing a three-dimensional schematic diagram of the spoke (including the stop surface);

[0032] Figure 9 showing a schematic diagram of the separable first disk (or second disk) of the present invention and the fixing device;

[0033] Figure 10 showing a schematic diagram of the inseparable first disk (or second disk) of the present invention and the fixing device;

[0034] Figure 11 showing a schematic diagram of the first disk (or second disk) of the present invention without the fixing device;

[0035] Figure 12 showing a schematic diagram of the fixing device of the present invention;

[0036] Figure 13 showing a schematic diagram of the first disk and the fixing device with some spokes installed;

[0037] Figure 14 showing a schematic diagram of the engagement between the stop surface of the spoke and the receiving surface of the first disk.

[0038] Embodiments of the present invention

[0039] See Figure 1 , Figure 1A gas purification disk is shown, which is composed of an outer ring 100, spokes 200 and a hub 300. The spokes 200 are respectively welded to the outer ring 100 and the hub 300. Since the spokes 200 are welded to the hub 300, the connection between the spokes 200 and the hub 300 will be heated during the connection process. After cooling, the connection between the spokes and the hub will be deformed to a certain extent. If the spokes are not welded to the outer ring 100, the entire gas purification disk will have uneven distribution of spokes in the circumferential direction due to the deformation of the spokes. The uneven distribution of the spokes brings problems such as poor dynamic balance effect and poor gas purification effect. The gas purification disk needs to be fixed on the shaft and driven by the motor. If there are major problems with the dynamic balance, the shaft and the motor are very likely to be damaged.

[0040] As Figure 2 shown, it is a schematic diagram of the gas purification disk of the present invention. In Figure 2 , the spoke 2 has a specific shape, and the spoke 2 is clamped and connected to the hub 3 through a stop surface. In Figure 2 , since the spoke 2 is not connected to the hub 3 by welding, there will be no problems such as false welding or loosening of the solder joints in the spoke 2, and the spoke 2 will not suddenly fall off during the working process, causing harm to the staff. Another advantage of clamping the spoke 2 to the hub 3 through the stop surface is that the spoke will not be deformed like welding when installing the spoke, thus affecting the assembly of the spoke and the hub.

[0041] Figure 2 , through holes corresponding to each other are provided on the first disk and the second disk of the hub. Bolts and the like are passed through the through holes to clamp the first disk and the second disk, as well as the workpieces between the first disk and the second disk.

[0042] Figure 3 shown is Figure 2 a schematic diagram of the gas purification disk in Figure 3 after removing the second disk 32 (or the first disk 31) of the hub. In

[0043] As Figure 4As shown, it is a front view of a spoke. A section of the spoke connected to the hub is provided with a stop surface 11. The stop surface 11 can be in a planar shape or a curved surface shape. When the stop surface is in a planar shape, the stop surface is perpendicular to the center line of the spoke or forms an angle with the center line of the spoke.

[0044] The stop surface can also be in a curved surface shape, such as Figure 5 shown; Figure 5 is Figure 4 a partial enlarged view of the spoke in. When the stop surface 11 is in a curved surface shape, preferably, it is a cylindrical curved surface formed along a curve as shown in Figure 5 in the direction perpendicular to the paper surface. Such a surface is convenient for processing, and when the stop surface and the bearing surface cooperate, a stable stop support mating surface can be formed, thereby reducing problems such as spoke trembling caused by unstable cooperation during the use of the gas purification disk.

[0045] As Figure 6 shown, Figure 6 shows the cross-sectional shape of the spoke when viewed along the Figure 4 A - A direction. Figure 8 is a schematic diagram of the usage state of the spoke. Figure 8 In, the spoke is formed with a first surface 21 (not shown) and a second surface 22. The first surface 21 is an oil fume purification surface, and when the gas purification disk rotates, the first surface collides with oil fume droplets or other particles. Refer to Figure 6 , the intersection line formed by the first surface and the center line perpendicular to the spoke is the first intersection line 201, and the function curve of this first intersection line; among them, the second surface forms a second intersection line 202 with the center line perpendicular to the spoke.

[0046] The first intersection line and the second intersection line can have different shapes. The first intersection line is close to a streamlined shape for handling air flow; the second intersection line is the back of the spoke and does not directly handle air flow; there are significant differences in their shapes.

[0047] The second intersection line can also be symmetric with respect to the first intersection line with respect to the connection line of the first intersection line and the second intersection line. As Figure 6 , the spoke 11 is symmetric with respect to a symmetry plane, and this symmetry plane is parallel to the plane formed by the center line of the spoke rotating around the center line of the gas purification disk. The spoke can also be asymmetric. The symmetry of the spoke with respect to the symmetry plane can make the spoke more stable.

[0048] As Figure 6 , the first intersection line 201 and the second intersection line 202 intersect at both ends, forming two intersection points, and the connection line of these two intersection points is parallel to the center line of the gas purification disk.

[0049] The function curve of the first intersection line of the spoke of the present invention also has a protrusion, which is formed by the intersection of a first line segment and a second line segment. The vertical distance from the intersection point of the first line segment and the second line segment to the center line of the spoke on the plane perpendicular to the spoke is greater than the vertical distance from other points on the first intersection line to the center line of the spoke. The protrusion is beneficial to reducing the resistance borne by the gas purification disk during rotation, thereby reducing the power and volume of the driving motor of the gas purification disk, and has a reducing effect on the overall volume and overall cost of the equipment using the gas purification disk.

[0050] The first line segment and the second line segment can be straight line segments or curve-shaped line segments such as quadratic curves, cubic curves, involutes, or their combined line segments. When the first intersection line transitions from the intersection point with the second intersection line to the intersection point of the first line segment and the second line segment, the angle between the tangent of the points on the first intersection line and the symmetry line of the cross-section changes. Such a shape of the first intersection line can form an approximately streamlined shape, thereby helping to reduce the resistance during the rotation of the gas purification disk.

[0051] For the other parts of the first intersection line except the first line segment and the second line segment, the parts of the first intersection line except the first line segment and the second line segment can be straight line segments or curve-shaped line segments such as quadratic curves and cubic curves, but the shapes of the first line segment and the second line segment are different from the shapes of the other parts of the first intersection line except the first line segment and the second line segment. The curvatures of the other parts of the first intersection line except the first line segment and the second line segment and the first line segment and the second line segment are different, and such curvatures should satisfy that when the first intersection line transitions from the intersection point with the second intersection line to the intersection point of the first line segment and the second line segment, the angle between the tangent of the points on the first intersection line and the symmetry line of the cross-section changes.

[0052] The curve shape of the first intersection line generally presents an "outward convex" shape. Such a shape enables the rotating spoke to effectively reduce the rotational resistance and also reduce the wind resistance. The reduction of the rotational resistance reduces the energy consumed by the rotation of the spoke; the reduction of the wind resistance reduces the energy consumed by the negative pressure fan. Compared with the spoke with a rectangular cross-section, the rectangular spoke has a large rotational resistance and a particularly large wind resistance; although the equivalent "impact" length of the rectangular spoke is longer, the higher the rotational speed of the rectangular spoke, the greater the wind resistance, resulting in the problems that a much higher negative pressure needs to be provided by the negative pressure fan and the power of the motor driving the rotation of the gas purification disk needs to be greater. Although the equivalent impact length is higher, it cannot improve the purification efficiency. Therefore, the purification efficiency of the rectangular spoke is too low and is unacceptable compared with the spoke with the cross-sectional shape of the present invention.

[0053] The curve shape of the first intersection line does not mean that the existence of straight line segments is excluded on the first intersection line. As long as the first intersection line is not merely composed of straight line segments with the same slope, the first intersection line is considered to have a curve shape.

[0054] The second intersection line can be straight or composed of a curved segment connected to a straight segment. For example, Figure 5 As shown, the second intersection line includes multiple line segments, and these line segments generally result in two depressions on the back of the spoke. There is a protrusion between the two depressions. This shape of the second intersection line enables the airflow to flow towards the depressions on the back of the spoke during the operation of the spoke, thereby reducing wind resistance. Under the same conditions, the power requirement of the exhaust fan can be reduced, and the overall functional cost and power consumption of the purification equipment can be reduced. The second intersection line can also result in one or more depressions on the back of the spoke.

[0055] When the second intersection line is straight, since the shape of the second surface of the spoke is relatively simple, the processing of the spoke becomes very simple, and the yield rate of the spoke is also greatly improved. The second intersection line is parallel to the center line of the gas purification disk. When the spoke processes the airflow to be purified, the flow direction of the airflow is more stable and reliable, without affecting the wind resistance of the gas purification disk.

[0056] Whether the second intersection line is straight or composed of multiple straight line segments and / or multiple curved line segments connected together, the second intersection line is symmetric about the midpoint.

[0057] The second intersection line can also be symmetric with respect to the first intersection line about the connection line of the first intersection line and the second intersection line; in this case, the spoke can play an equal purification role whether it rotates forward or backward.

[0058] The first intersection line removes droplets and solid particles by impinging on the airflow. The first intersection line preferably has a functional curve shape composed of one or more curved line segments. This shape can minimize the resistance of splitting the wind during the rotation of the spoke. Especially the shape of the curved line segment of a continuous function that is basically "outward convex".

[0059] For example, Figure 7 , the dimension of the first intersection line and the second intersection line in the width direction is a, and the dimension of the first intersection line and the second intersection line in the thickness direction is b; the ratio of a to b is between 1.2 and 4; the larger the ratio of a to b, the smaller the circumferential dimension occupied by the spoke on the hub under the condition of the same gas treatment surface; however, if the ratio of a to b is too large, the rigidity of the spoke is insufficient, it is easy to bend, and during the operation, the possibility of the spoke jittering and generating noise is also greater. Therefore, the ratio of a to b should be within a suitable range; according to the research and experiments of the inventor, the optimal ratio of a to b is 2, and the value of a to b can also be 1.6, 1.8, 2.2, 2.4, 2.8, 3.2, 3.5, 3.7. The range of a can be 0.5 to 10 millimeters, specifically it can be 1, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5 millimeters.

[0060] Figure 7 The spoke shape in it presents a general size shape of a≈2b, so that under the same spoke installation density, the spoke can have a longer depth for fume purification; combined with the shapes of the first intersection line and the second intersection line of the spoke, the spoke can have less rotational resistance and less wind resistance under the condition of a longer purification depth.

[0061] Figure 9 It shows a schematic diagram that the first disc 31 and the fixing device 4 are separable. Figure 9 In it, the fixing device 4 includes a number of fixing blocks 41 and a connecting ring 42. The connecting ring 42 and the number of fixing blocks 41 can be made of metal material or plastic material. The connecting ring 42 and the number of fixing blocks 41 are integrally structured and can be obtained by machining, or can be made by die casting or injection molding of metal.

[0062] Figure 9 In it, the first disc 31 and the fixing device 4 are separable. Generally, the first disc is first made into a blank by die casting, casting or forging, and then the detailed parts need to be machined by machining methods to form a relatively precise first disc. The fixing device can be made by precision casting or injection molding methods. For the fixing device 4, if it forms an inseparable whole with the first disc, then the detailed parts of the fixing device 4 all need to be machined by machining methods, and in this case, the cost will be relatively high. The separability of the first disc 31 and the fixing device 4 means that the first disc 31 and the fixing device 4 can also be made of different materials. For example, the first disc is made of aluminum alloy or magnesium alloy, and the fixing device 4 is made of polymer.

[0063] See Figure 10 , the first disc 31 and the fixing device 4 are inseparable. In this case, the first disc 31 and the fixing device 4 are actually made from the same blank. The blank is made by casting, and then the detailed parts of the first disc 31 and the fixing device 4 are machined by machining methods. This way can obtain a relatively ideal first disc 31 and fixing device 4, and there is no problem of assembly for the first disc 31 and the fixing device 4. In this case, the fixing ring 41 of the fixing device 4 described above is actually not needed, because the fixing device does not need to connect the fixing blocks through the fixing ring, and the fixing blocks and the first disc are integrally formed.

[0064] Figure 11 It shows a schematic diagram of the first disc in the case where the first disc 31 and the fixing device 4 are separable. Figure 11 In it, a bearing surface 311 is provided on the first disc 31, Figure 11The bearing surface 311 therein is cylindrical. The bearing surface 311 can cooperate with the spoke to fix the spoke in the axial direction. The bearing surface 31 can also be a cylindrical surface, a conical surface or a rotating surface of a function curve. The shape of the bearing surface mainly depends on the shape of the stop surface of the spoke. There is a stop surface on the spoke, and this bearing surface needs to be able to cooperate with the stop surface on the spoke to form a stable cooperation relationship and effectively fix the spoke in the radial direction.

[0065] Figure 11 The first disk 31 therein also has a receiving groove 32; the receiving groove 32 is used to receive the connecting ring of the fixing device 4. The connecting ring 42 is received in the receiving groove 32; the connecting ring plays a role in connecting the fixing blocks. At the same time, since the connecting ring 42 is received in the receiving groove 32, the connecting ring will not affect the fixing of the spoke. In addition, the receiving groove 32 also has a positioning device, and the positioning device in the receiving groove 32 is adapted to the positioning device of the connecting ring 42. During assembly, first place the part of the first disk with the bearing surface 311 upwards, then install the connecting ring in the receiving groove 32, and then install the spoke between the fixing blocks.

[0066] Figure 12 Shows a schematic diagram of the fixing device. Figure 12 The connecting ring 42 and several fixing blocks 41 in it are integrally provided to form a fixing device.

[0067] Figures 13 - 14 Shows a schematic diagram of a part of the spoke 2 installed on the first disk 31 and the fixing device 4. As can be seen from Figure 14 it, the bearing surface 311 on the first disk 31 cooperates with the stop surface on the spoke to fix the spoke 2 in the radial direction; the spoke 2 is placed between adjacent fixing blocks 41 of the fixing device 4 to fix the spoke 2 in the circumferential direction. After the spoke 2 is installed between adjacent fixing blocks 41 of the fixing device 4, install the second disk, and the spoke and the fixing device are fixed between the first disk and the second disk, so that the spoke is fixed in the axial direction.

[0068] Figure 14 Is a schematic diagram (partial) of the cooperation relationship between the spoke 2 and the first disk 31 after the fixing device 4 is removed from the first disk 31. As can be seen from the figure, the stop surface of the spoke cooperates with the bearing surface 311 of the first disk to fix the spoke 2 in the radial direction.

[0069] The assembly process of the wheel hub of the present invention when used for a gas purification disc is as follows: After the first disc is placed stably, the fixing device is assembled with the first disc (if the fixing device and the first disc are integrated, the first disc and the fixing device can be directly placed stably). Subsequently, all the spokes are placed between the fixing blocks of the fixing device, and spokes are placed in all the gaps formed by the fixing blocks. Then, the second disc is assembled onto the first disc and the fixing device. Subsequently, fastening devices such as bolts are used to fasten the first disc (and the fixing device), the spokes, and the second disc together.

[0070] In the present invention, the first disc, the second disc, and the fixing device all have a center of rotation, and the centers of rotation of the three coincide; the center of rotation of the bearing surface of the present invention coincides with the center of rotation of the fixing device. After the spokes are installed on the wheel hub of the present invention, the spokes will be able to rotate around the centers of rotation of the first disc, the second disc, and the fixing device of the present invention.

[0071] Experimental results

[0072] In order to test the purification effect of the present invention, we conducted experiments based on the following conditions:

[0073] The diameter of the gas purification disc is: 30 cm; the outer diameter of the wheel hub of the gas purification disc is 13 cm; the rotational speed of the gas purification disc is: 1300 revolutions per minute. Under non-diffusion conditions, a fume simulation generating device is used to generate fumes, and the fumes generated by the fume generating device are processed by a purification device equipped with a gas purification disc. The experimental time is 11 minutes. The fume simulation generating device generates 2 g of fumes per minute. The fume purification device generates a total of 40 g of fume gas containing pollutants within 10 minutes; the fume oil purification device operates for a total of 11 minutes. A non-woven fabric sheet with a diameter of 10 cm is fixedly arranged 5 cm behind the gas purification disc. The weight of the clean non-woven fabric is weighed before the test, and the weight of the non-woven fabric is weighed after the test. A decibel meter is arranged 20 cm below the gas purification disc.

[0074] In the embodiment, except for the circular spokes, the ratio of a to b of the spokes used is 2.

[0075] The variables of the test are gas flow rate, the number and shape of the spokes of the gas purification disc, and the test results are as follows:

[0076]

[0077]

[0078] The above purification rate calculation formula is as follows: Reduction amount of pollutants / Total amount of pollutants.

[0079] As can be seen from the above table, the gas purification disc applying the spokes of the present invention has a high purification rate and good purification effect. The reason is as follows: Using the rotating spokes to remove liquid droplets and solid particulate matters in the gas is to utilize the spokes rotating to impact the heavier liquids or particles in the gas; during the impact process, the surface of the spokes that mainly plays the impact role is the surface of the spokes in the rotating direction; for circular spokes, the front half of the surface of the spokes in the rotating direction is the surface that mainly plays the impact role. For example, for a spoke with a diameter of x, along the diameter direction of the gas purification disc, the effective impact length is x / 2. When the effective impact length is determined, the number of spokes set is limited by the diameter of the hub of the gas purification disc. Assuming the hub diameter is d, then the number of spokes must be less than πd / x. For example, in the case where the hub diameter is 13 cm and the spoke diameter is 2 mm, the limit value of the number of spokes is π*130 / 2≈204, that is to say, it is absolutely impossible to exceed 204 spokes. In fact, 180 spokes are already the limit value. Once the hub diameter is determined, the upper limit of the number of spokes is determined, and the gap between adjacent spokes is also determined. In this case, at a certain gas flow rate, the gas purification disc needs to have a certain rotational speed, and the rotational speed needs to meet the requirement of being able to impact all the gas flowing through the gap within a certain time. If the gas flow rate is large, then when the effective impact length and the gap between adjacent spokes are determined, the rotational speed of the gas purification disc needs to be large. Although some problems can be solved by increasing the rotational speed, there are also the following problems: The increase in rotational speed is limited, and the rotational speed is limited by the rotational speed of the motor. In addition, if the rotational speed is too high, the energy consumption is too large and the noise is too large. Due to the limited rotational speed, it is difficult to obtain a good purification effect in some occasions with serious pollution.

[0080] In the technical solution proposed by the present invention, assuming b = x, then a≈2x, and the equivalent effective impact length is x. At this time, the upper limit of the number of spokes is still a certain value less than πd / x. With the number of spokes unchanged, the effective impact length of the spokes of the present invention becomes twice the original. In this way, when the gas flow rate is certain, the rotational speed of the gas purification disc can be reduced to about half of that of the circular spokes.

[0081] The above explains the reason why in the experiment, the purification rates of Examples 1, 2, and 3 of the present invention are higher, while the purification rates of Examples 4-8 are different but significantly lower than those of Examples 1-3 of the present invention.

[0082] In addition, since the spokes are circular, the possibility of elastic deformation in all directions is very high. Therefore, when the particulate matters or liquid droplets in the oil fume hit the spokes, they will jitter irregularly. Under the condition of high-speed rotation, they will rub against the air flow, thus generating a lot of noise.

[0083] After adopting the spoke structure of the present invention, generally speaking, the purification disk can use fewer spokes and a lower rotational speed, can obtain higher purification efficiency, and effectively reduces noise.

[0084] The gas purification disk of the present invention effectively reduces the overall installation cost of the gas purification disk, reduces the overall cost of the purification equipment equipped with the gas purification disk, and improves the purification efficiency.

[0085] The above content is a further detailed description of the present invention in combination with specific preferred technical solutions, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A gas purification disk, comprising a first disk, a second disk and spokes. The first disk is provided with a hole connected to a rotary drive device, and the rotation axis of the first disk coincides with the rotation axis of the second disk; the first disk and the second disk are detachably connected together; wherein the first disk is provided with an annular retaining surface, and the rotation axis of the retaining surface coincides with the rotation axis of the first disk; the spokes have a stop surface, and the retaining surface on the first disk cooperates with the stop surface on the spokes. The cross-sectional shapes of the spokes are the same along the center line direction. The spokes are formed with a first surface and a second surface. The intersection line formed by the first surface and the plane perpendicular to the center line of the spoke is the first intersection line, and the first intersection line is in the shape of a function curve; the intersection line formed by the second surface and the plane perpendicular to the center line of the spoke is the second intersection line. When the spokes rotate, the first surface is the oil fume purification surface. When the gas purification disk rotates, the first surface collides with oil fume droplets or other particles. The first intersection line and the second intersection line have different shapes, and the first intersection line and the second intersection line have two intersection points. The connection line of the two intersection points is parallel to the center line of the gas purification disk. The first intersection line has a protrusion, which is formed by the intersection of a first line segment and a second line segment. The vertical distance from the intersection point of the first line segment and the second line segment to the center line of the spoke in the plane perpendicular to the spoke is greater than the vertical distance from other points on the first intersection line to the center line of the spoke. The first line segment and the second line segment are straight line segments, quadratic curves, cubic curves, involute curve-shaped line segments or a combination of them. The other parts of the first intersection line except the first line segment and the second line segment are straight line segments, quadratic curves or cubic curve-shaped line segments, but the shapes of the first line segment and the second line segment are different from the shapes of the other parts of the first intersection line except the first line segment and the second line segment. When the first intersection line transitions from the intersection point with the second intersection line to the intersection point of the first line segment and the second line segment, the angle between the tangent of the points on the first intersection line and the symmetry line of the cross-section is variable. The ratio of the dimension in the thickness direction to the dimension in the width direction of the spokes is 1:1.2 to 4. It further includes a plurality of fixing blocks arranged along the circumference of the hub, and grooves are formed between adjacent fixing blocks; the spokes are installed in the grooves, and the plurality of fixing blocks are integrally formed with the first disk or the plurality of fixing blocks are fixed by a fixing ring.

2. The gas purification disk according to claim 1, wherein the retaining surface is a cylindrical surface, a conical surface or a rotary surface of a function curve; the stop surface corresponds to the shape of the retaining surface.

3. The gas purification disk according to claim 1, wherein the ratio of the dimension in the thickness direction to the dimension in the width direction of the spokes is 1:

2.

4. The gas purification disk according to claim 1, wherein the size of the groove is adapted to the size of the spoke.

5. The gas purification disk according to claim 1, wherein an interference fit is formed between the spoke and the fixing block.

6. The gas purification disk according to claim 1, the retaining surface, the spokes and the fixing device are arranged between the first disk and the second disk, and the first disk and the second disk are fixed by a fastening device.

7. A gas purification device, comprising a driving device and a gas purification disc as described in any one of claims 1-6.

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