Centrifugal dust removal mechanism and dust removal device using same

Abstract

The utility model discloses a centrifugal dust removal mechanism and a dust removal device using the same. The centrifugal dust removal mechanism comprises a motor and a dust removal assembly connected with an output shaft of the motor, the dust removal assembly comprises a filter cloth bag; the supporting framework comprises an outer frame arranged on the outer layer of the filter cloth bag, an inner frame arranged on the inner layer of the filter cloth bag, and a connecting column which is arranged on the inner layer of the inner frame, is connected with the inner frame and is used for being connected with an output shaft of the motor; the grading wheel set comprises at least two arc-shaped fin plates which are arranged on the outer side of the outer frame and are sequentially arranged in the circumferential direction of the filter cloth bag, and an annular skirt edge which is arranged on the circumferential side of the bag bottom of the filter cloth bag and is connected with the outer frame; wherein one axial side edge of each fin plate is fixedly connected with the outer frame, the other axial side edge of each fin plate covers one axial edge of the other fin plate, and a gap suitable for gas circulation exists between the axial edges of the two fin plates matched with the covers. According to the utility model, the dust removal efficiency in a long-time use state can be optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal equipment, in particular to a centrifugal dust removal mechanism and a dust removal device using the same. Background Art

[0002] Bag filter is a common dust collector, which can purify and filter the gas by absorbing dust in the gas through filter bags. After working for a long time, a large amount of dust will be attached to the dust collection bags inside the bag filter. This dust will cause the gas flow resistance to increase and the filtering effect of the gas will be greatly reduced. In order to improve the dust removal efficiency of the bag filter, the dust particles on the bag filter need to be removed.

[0003] In this regard, existing powder dust collectors mostly use a bag plus gas pulse back-blowing structure. When the dust mixture passes through the bag, the dust will maintain linear motion due to inertia and hit the bag fibers and be captured. It cannot be shaken off by back-blowing. The dust will continue to block the bag, resulting in a decrease in gas flow rate and dust removal efficiency. In addition, the larger the diameter of the dust particles, the greater the inertia. The higher the filtration air velocity, the greater the inertia. However, if the air velocity is too high, the amount of air passing through the bag will also increase, and the airflow will penetrate the weak points of the filter cloth, resulting in a decrease in dust removal efficiency. The higher the air velocity, the more serious the penetration phenomenon. For example, a low-emission pulse jet bag dust collector is disclosed in the announcement number CN219647024U.

[0004] In addition, the powder dust collector can also use a centrifugal bag dust collector, which can remove the powder attached to the surface of the dust bag through the rotation of a high-speed motor, so that the dust collector can maintain a normal working state, thereby achieving a dust removal effect. However, for nano-level powders, the particles are too small and the mass is too light, and the dust particles cannot be removed by centrifugal force. The dust will still be enriched on the surface of the bag, and the dust removal effect is not good. For example, a bag dust removal device disclosed in the announcement number CN221579982U.

[0005] Therefore, in order to solve the problem that the filtering effect of the dust removal device currently used in the prior art decreases with the extension of the use time, it is necessary to improve the dust removal functional components. Utility Model Content

[0006] The first purpose of the utility model is to provide a centrifugal dust removal mechanism to solve the technical problem of optimizing the dust removal efficiency of the dust removal mechanism under long-term use.

[0007] The second object of the utility model is to provide a dust removal device to solve the technical problem of optimizing the dust removal efficiency of the dust removal mechanism when it is used for a long time.

[0008] The centrifugal dust removal mechanism of the utility model is realized as follows:

[0009] A centrifugal dust removal mechanism, comprising: a motor and a dust removal assembly connected to the output shaft of the motor;

[0010] The dust removal assembly includes:

[0011] A filter cloth bag;

[0012] A support skeleton, which includes an outer frame arranged on the outer layer of the filter cloth bag, an inner frame arranged on the inner layer of the filter cloth bag, and a connecting column arranged on the inner layer of the inner frame and connected to the inner frame for connecting to the output shaft of the motor;

[0013] A grading wheel set, which includes at least two arc-shaped wing plates arranged on the outer side of the outer frame in sequence along the circumferential direction of the filter cloth bag, and an annular skirt arranged on the circumferential side of the bottom of the filter cloth bag and connected to the outer frame; wherein

[0014] One axial side edge of each wing plate is fixedly connected to the outer frame, and the other axial side edge covers one of the axial edges of another wing plate, and there is a gap suitable for gas flow between the axial edges of the two wing plates in the covering fit;

[0015] The end parts of the inner frame and the outer frame corresponding to the bag mouth of the filter cloth bag both protrude from the end parts of each wing plate facing the bag mouth of the filter cloth bag.

[0016] In an optional implementation case of the present utility model, each of the wing plates is welded and fixed to the outer frame.

[0017] In an optional implementation case of the present utility model, the grading wheel set includes 6 to 10 wing plates with the same structure; and

[0018] The outer circumferential edge of the annular skirt protrudes from the outer edge of each of the wing plates facing away from the filter cloth bag.

[0019] In an optional implementation case of the present utility model, the cross-section of the annular skirt along the axial direction of the filter cloth bag is arc-shaped.

[0020] In an optional implementation case of the present utility model, the axial direction of each of the wing plates extends to the annular skirt.

[0021] In an optional implementation case of the present utility model, the outer frame includes an upper outer ring and a lower outer ring arranged at intervals along the axial direction of the filter cloth bag, and a plurality of outer connecting rods arranged between the upper outer ring and the lower outer ring; wherein

[0022] One axial edge of each of the wing plates is welded and connected to an outer connecting rod;

[0023] An axial notch suitable for gas flow is formed between every two adjacent outer connecting rods;

[0024] The upper outer ring, the lower outer ring and the outer connecting rod can jointly enclose a cylindrical skeleton with hollowed-out sides and two axially side ends.

[0025] In an alternative embodiment of the present invention, the inner frame includes an upper inner ring and a lower inner plate which are arranged at intervals along the axial direction of the filter bag, and a plurality of inner connecting rods arranged between the upper inner ring and the lower inner circle; among them

[0026] An axial gap suitable for gas flow is formed between each adjacent pair of inner connecting rods;

[0027] The upper inner ring, the lower inner plate and the inner connecting rods can jointly enclose a cylindrical skeleton with a hollowed-out side and a hollowed-out axially side end.

[0028] In an alternative embodiment of the present invention, the upper inner ring and the upper outer ring are respectively located inside and outside the mouth of the filter bag, and the lower inner plate and the lower outer ring are respectively located inside and outside the bottom of the filter bag; and

[0029] The upper inner ring and the upper outer ring and the mouth of the filter bag are tightly fitted with screws.

[0030] In an alternative embodiment of the present invention, the connecting column is supported and fixed on the lower inner plate.

[0031] In an alternative embodiment of the present invention, at least two reinforcing rods are further arranged between the connecting column and the upper inner ring and the inner connecting rods of the inner frame at intervals along the circumferential direction of the connecting column.

[0032] A dust removal device includes: the centrifugal dust removal mechanism as described above, and a housing used in cooperation with the centrifugal dust removal mechanism; among them

[0033] The outer frame is rotationally fitted with the housing; and

[0034] An air inlet pipe, an air outlet pipe and a dust discharge port are further arranged on the housing.

[0035] By adopting the above technical solutions, the present invention has the following beneficial effects: the centrifugal dust removal mechanism of the present invention and the dust removal device using the same, by designing a grading wheel set on the outer layer of the filter bag, avoid dust directly hitting the filter bag through linear motion, and the grading wheel set is used to separate the gas mixed with dust, reducing the possibility of blocking the filter bag, thereby ensuring the stability of the gas passing rate and the dust removal efficiency under long-term use conditions.

[0036] Specifically, when the motor rotates and the gas mixed with dust flows on the outer side of the wing plates of the grading wheel set facing away from the filter cloth bag, the gas will adhere to the surface due to the "Coanda effect" and finally leave through the filter cloth bag of the dust removal cloth bag. The dust in the dust gas will not be able to adhere to the surface due to the frictional force, so it will be separated and return to the dust mixture again. This method not only throws off dust particles by centrifugal force, but also realizes the separation of powder and gas through the interaction of the "Coanda effect" and frictional force. Therefore, it also has a good separation effect on nano-scale powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural view of the first perspective of the grading wheel set of the centrifugal dust removal mechanism of the present invention;

[0038] Figure 2 is a schematic structural view of the second perspective of the grading wheel set of the centrifugal dust removal mechanism of the present invention;

[0039] Figure 3 is a schematic structural view of the third perspective of the grading wheel set of the centrifugal dust removal mechanism of the present invention;

[0040] Figure 4 is a schematic structural view of the centrifugal dust removal mechanism of the present invention;

[0041] Figure 5 is a schematic structural view of the dust removal device of the present invention.

[0042] In the figure: motor 1, output shaft 2, air outlet pipe 3, connecting column 4, reinforcing rod 5, inner connecting rod 6, filter cloth bag 7, outer connecting rod 8, wing plate 9, annular skirt 10, screw 11, lower inner plate 12, lower outer ring 13, upper inner ring 14, upper outer ring 15, housing 16, dust discharge port 17, air inlet pipe 18. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] In order to make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0044] Embodiment 1:

[0045] Please refer to Figures 1 to 4 As shown, this embodiment provides a centrifugal dust removal mechanism, including: a motor 1 and a dust removal assembly connected to the output shaft 2 of the motor 1. In this structure, the rotation of the motor 1 can drive the overall dust removal assembly to make a rotational motion.

[0046] Regarding the dust removal assembly adopted in this embodiment, in detail with reference to the accompanying drawings, it includes a filter cloth bag 7, a support skeleton for fixing the filter cloth bag 7, and a grading wheel set connected to the support skeleton and located outside the filter cloth bag 7.

[0047] First, the filter bag 7 is in a bag-like structure as a whole, and can be formed into a cylindrical body as a whole by being supported by the support frame. The filter bag 7 has a bag opening that can be opened by the support frame, so that the gas entering the filter bag 7 can leave from the bag opening. Optionally, the precision of the filter bag 7 is 3 to 5 microns, which can be adjusted according to the nano powder material.

[0048] Secondly, the support frame includes an outer frame arranged on the outer layer of the filter bag 7, an inner frame arranged on the inner layer of the filter bag 7, and a connecting column 4 arranged on the inner layer of the inner frame and connected to the inner frame for connecting to the output shaft 2 of the motor 1.

[0049] In more detail, the outer frame used in this embodiment includes an upper outer ring 15 and a lower outer ring 13 arranged at intervals along the axial direction of the filter bag 7, and a plurality of outer connecting rods 8 arranged between the upper outer ring 15 and the lower outer circle; wherein an axial edge of each fin plate 9 is welded to an outer connecting rod 8; and an axial notch suitable for gas circulation is formed between each two adjacent outer connecting rods 8. Here, the upper outer ring 15 and the lower outer ring 13 are circular structures of the same size. Under this structure, the upper outer ring 15, the lower outer ring 13 and the outer connecting rods 8 can be enclosed together to form a cylindrical skeleton with hollowed-out sides and two axial ends.

[0050] The inner frame includes an upper inner ring 14 and a lower inner plate 12 arranged at intervals along the axial direction of the filter bag 7, and a plurality of inner connecting rods 6 arranged between the upper inner ring 14 and the lower inner circle; wherein an axial notch suitable for gas circulation is formed between each two adjacent inner connecting rods 6. The upper inner ring 14 is a circular structure, the lower inner plate 12 is a circular plate-like body, and the upper inner ring 14 and the lower inner plate 12 have the same outer diameter. Based on this, the upper inner ring 14, the lower inner plate 12 and the inner connecting rods 6 can be enclosed together to form a cylindrical skeleton with a hollow side and a hollow axial side end. The connecting column 4 is supported and fixed on the lower inner plate 12. The outer diameter of the upper inner ring 14 is smaller than the inner diameter of the upper outer ring 15, and the outer diameter of the lower inner plate 12 is smaller than the inner diameter of the lower outer ring 13.

[0051] On the basis of the above structure, in an optional implementation, in order to strengthen the overall support frame and the use strength of the connecting column 4 under the action of the motor 1, at least two reinforcement rods 5 are also provided between the connecting column 4 of this embodiment and the upper inner ring 14 of the inner frame and the inner connecting rod 6, which are spaced apart along the circumferential direction of the connecting column 4.

[0052] Based on the above situation, the upper inner ring 14 and the upper outer ring 15 are respectively located at the inner and outer sides of the bag opening of the filter cloth bag 7, and the lower inner plate and the lower outer ring are respectively located at the inner and outer sides of the bag bottom of the filter cloth bag 7; and the upper inner ring 14, the upper outer ring 15 and the bag opening of the filter cloth bag 7 are fastened with screws 11.

[0053] Next, a specific description will be given of the grading wheel group, which includes at least two arc-shaped wing plates 9 arranged in sequence along the circumferential direction of the filter bag 7 on the outer side of the outer frame, and an annular skirt 10 arranged on the circumferential side of the bottom of the filter bag 7 and connected to the outer frame. Each wing plate 9 is welded and fixed to the outer connecting rod 8 of the outer frame.

[0054] Taking an optional implementation case as an example, the grading wheel group includes 6 to 10 wing plates 9 with the same structure; and the outer circumferential edge of the annular skirt 10 protrudes from the outer edge of each wing plate 9 facing away from the filter bag 7. The cross-section of the annular skirt 10 along the axial direction of the filter bag 7 is arc-shaped. The axial direction of each wing plate 9 extends to the annular skirt 10. It should be noted here that the annular skirt 10 can also be integrally processed and formed with the lower outer ring 13 of the outer frame. Additionally, in an optional implementation manner, the lower outer ring 13 of the outer frame can also be replaced with a circular plate-like body similar to the lower inner plate 12, and of course, when using the plate-like body, it can also be integrally processed and formed with the annular skirt 10.

[0055] Based on the above structure, it should be further noted that one axial side edge of each wing plate 9 is fixedly connected to the outer connecting rod 8 of the outer frame, and the other axial side edge covers one of the axial edges of another wing plate 9, and there is a gap suitable for gas flow between the axial edges of the two wing plates 9 in the covering fit; that is to say, there is a fitting gap between the axial edges of the two wing plates 9 in the covering fit along the radial plane of the filter bag 7, so the axial edges of the two wing plates 9 in the covering fit do not directly contact each other.

[0056] In addition, regarding the centrifugal dust removal mechanism of this embodiment, it should also be noted that the inner frame and the outer frame corresponding to the end of the filter bag 7 of the bag mouth, that is, the upper outer ring 15 and the inner and outer rings of this embodiment, protrude from the end of each wing plate 9 facing the bag mouth of the filter bag 7. This design is to facilitate the assembly of the grading wheel group of this embodiment into the housing 16 of the dust removal device, which will be specifically described in Embodiment 2.

[0057] In summary, for the centrifugal dust removal mechanism of this embodiment, by designing the grading wheel group on the outer layer of the filter bag 7, it avoids the dust directly hitting the filter bag 7 through linear motion. The grading wheel group separates the gas mixed with dust, reduces the possibility of clogging the filter bag, and thus ensures the stability of the gas passing rate and the dust removal efficiency under long-term use conditions.

[0058] Specifically, when the motor 1 rotates and the gas mixed with dust flows on the outer side of the fin 9 of the classification wheel group facing away from the filter cloth bag 7, the gas will adhere to the surface due to the "Coanda effect" (the Coanda effect is also known as the wall attachment effect or the Coandă effect. It refers to the tendency of a fluid (water flow or air flow) to change from its original flow direction to flow along the surface of a convex object. When there is surface friction between the fluid and the surface of the object it flows over, as long as the curvature is not large, the fluid will flow along the surface of the object. According to Newton's third law, when an object exerts a deflecting force on the fluid, the fluid must also exert a reverse deflecting force on the object). Finally, it leaves through the filter cloth bag 7 of the dust removal bag, and the dust in the dust gas cannot adhere to the surface due to friction, so it is separated and returns to the dust mixed gas again. This method not only uses centrifugal force to throw off dust particles, but also realizes the separation of powder and gas through the interaction of the "Coanda effect" and friction. Therefore, it also has a good separation effect on nano-scale powder.

[0059] Embodiment 2:

[0060] Please refer to Figures 1 to 5 As shown in the figure, on the basis of the centrifugal dust removal mechanism of Embodiment 1, this embodiment provides a dust removal device, including: the centrifugal dust removal mechanism of Embodiment 1, and a housing 16 used in cooperation with the centrifugal dust removal mechanism; wherein the upper outer ring 15 of the outer frame and the inner wall of the housing 16 are rotationally matched by using, for example but not limited to, bearings; and an air inlet pipe 18, an air outlet pipe 3 and a dust discharge port 17 are further provided on the housing 16. The air outlet pipe 3 is configured with a draft fan or a vacuum system.

[0061] Based on the above situation, it should also be noted that when the outer frame and the housing 16 are assembled in place, a small axial gap is formed between the end of the plurality of fins 9 of the classification wheel group facing the upper outer ring 15 and the part of the housing 16 connecting the upper outer ring 15, so that the classification wheel group will not be interfered by the housing 16 when rotating under the action of the motor 1, and at the same time, this axial gap can prevent a large amount of dust mixed gas from passing through.

[0062] Regarding the specific housing 16 and the air inlet pipe 18, the air outlet pipe 3 and the dust discharge port 17 on the housing 16, any mature means in the prior art can be optionally adopted. This embodiment does not make improvements to them, so the specific structures and implementation principles are not limited.

[0063] For the dust removal device of this embodiment, before starting the device, first start the induced draft fan or vacuum system behind the air outlet pipe 3, and then start the motor 1. The outer frame, filter bag 7 and inner frame will rotate together with the motor 1, for example, in a "counterclockwise" direction. Under the action of the induced draft fan or vacuum system, the dust mixture gas reaches the side wing plate 9 along the annular skirt 10 structure, and the separation of powder and gas is achieved through the interaction of the "Coanda effect" and friction. The powder re-enters the dust mixture gas, and the gas from which the powder has been filtered passes through the filter bag 7 and the inner frame, and finally is discharged from the air outlet pipe 3. When the device stops, first turn off the induced draft fan or vacuum system behind the air outlet pipe 3, and then turn off the motor 1 to stop it.

[0064] The above specific embodiments have further elaborated on the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0065] In the description of the present invention, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0066] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0068] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0069] In the present utility model, unless otherwise clearly specified and defined, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being above, over and on top of the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

Claims

1. A centrifugal dust removal mechanism, characterized in that, Comprising: A motor and a dust removal assembly connected to the output shaft of the motor; The dust removal assembly includes: A filter cloth bag; A support skeleton, which includes an outer frame provided on the outer layer of the filter cloth bag, an inner frame provided on the inner layer of the filter cloth bag, and a connecting column provided on the inner layer of the inner frame and connected to the inner frame for connecting to the output shaft of the motor; A grading wheel group, which includes at least two arc-shaped wing plates arranged in sequence along the circumferential direction of the filter cloth bag on the outer side of the outer frame, and an annular skirt connected to the outer frame on the circumferential side of the bottom of the filter cloth bag; where One axial side edge of each wing plate is fixedly connected to the outer frame, and the other axial side edge covers one of the axial edges of another wing plate, and there is a gap suitable for gas flow between the axial edges of the two wing plates in the covering fit; The ends of the inner frame and the outer frame corresponding to the mouth of the filter cloth bag protrude from the ends of each wing plate facing the mouth of the filter cloth bag.

2. The centrifugal dust removal mechanism according to claim 1, characterized in that, Each of the wing plates is welded and fixed to the outer frame.

3. The centrifugal dust removal mechanism according to claim 1 or 2, characterized in that, The grading wheel group includes 6 to 10 wing plates with the same structure; and The outer circumferential edge of the annular skirt protrudes from the outer edge of each of the wing plates facing away from the filter cloth bag; The cross-section of the annular skirt along the axial direction of the filter cloth bag is arc-shaped.

4. The centrifugal dust removal mechanism according to claim 1 or 2, characterized in that, The axial direction of each of the wing plates extends to the annular skirt.

5. The centrifugal dust removal mechanism according to claim 1, wherein, The outer frame includes an upper outer ring and a lower outer ring arranged at intervals along the axial direction of the filter cloth bag, and a plurality of outer connecting rods arranged between the upper outer ring and the lower outer ring; where One axial edge of each of the wing plates is welded and connected to an outer connecting rod; An axial gap suitable for gas flow is formed between every two adjacent outer connecting rods; The upper outer ring, the lower outer ring and the outer connecting rods can jointly enclose a cylindrical skeleton with a hollowed-out side surface and two axially side ends.

6. The centrifugal dust removal mechanism according to claim 5, characterized in that, The inner frame includes an upper inner ring and a lower inner plate arranged at intervals along the axial direction of the filter cloth bag, and a plurality of inner connecting rods arranged between the upper inner ring and the lower inner ring; where An axial gap suitable for gas flow is formed between every two adjacent inner connecting rods; The upper inner ring, the lower inner plate and the inner connecting rods can jointly enclose a cylindrical skeleton with a hollowed-out side surface and a hollowed-out axially side end.

7. The centrifugal dust removal mechanism according to claim 6, characterized in that, The upper inner ring and the upper outer ring are respectively located inside and outside the mouth of the filter cloth bag, and the lower inner plate and the lower outer ring are respectively located inside and outside the bottom of the filter cloth bag; and The upper inner ring and the upper outer ring and the mouth of the filter cloth bag are fastened and fitted with screws.

8. The centrifugal dust removal mechanism according to any one of claims 5 to 7, characterized in that The connecting column is supported and fixed on the lower inner plate.

9. The centrifugal dust removal mechanism according to claim 8, wherein, At least two reinforcing rods are further arranged between the connecting column and the upper inner ring and the inner connecting rods of the inner frame at intervals along the circumferential direction of the connecting column.

10. A dust removal device, characterized in that, Comprising: The centrifugal dust removal mechanism according to any one of claims 1 to 9, and a housing used in cooperation with the centrifugal dust removal mechanism; Where The outer frame is rotationally fitted with the housing; and An air inlet pipe, an air outlet pipe and a dust discharge port are further provided on the housing.

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