Dust removal device

Abstract

The invention relates to the technical field of dust removal, in particular to a dust removal device which comprises a shell, an air injection assembly and a dust suction part, a dust removal chamber is formed in the shell, and the dust removal chamber is provided with an open window; the air injection assembly is arranged in the dust removal chamber and can rotate around a preset axis, and the air injection end of the air injection assembly faces the open window; the dust collection part is arranged on the shell and located on the periphery of the air injection assembly. According to the dust removal device, the air injection assembly rotates around the preset axis, the air injection end can rotate around the preset axis, so that continuously rotating airflow is formed, the surface of the concave-convex material is cleaned with small electric power and energy consumption, and the dust removal efficiency is high. The dust collection part is arranged on the periphery of the air injection assembly, dust blown by airflow can be sucked away in time, and secondary pollution of the dust is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of dust removal, and in particular to a dust removal device. Background Art

[0002] Dust removal technology can be divided into two categories according to the dust removal method, namely, using liquid as the dust removal medium and using gas as the dust removal medium. Liquid media are mainly water washing, which consumes resources, and wastewater needs to be treated. Subsequently, baking is required to evaporate the water, which occupies a large space on the assembly line and has the risk of damaging equipment. The cleaning method of the gas medium is that the fan provides a clean air source for the air knife. The air knife has applications in the industrial field such as air blowing to remove water and air blowing to remove dust, and uses the high-speed airflow blown out by the air knife to remove dust from the dust-removable parts.

[0003] At present, the surfaces of the parts to be dusted can be divided into flat surfaces and concave-convex surfaces. The effect of dust removal on flat surfaces using high-speed airflow blown by wind knives is acceptable, but when dusting concave-convex surfaces, it is difficult for the airflow to cover the concave area; and ultrasonic dust removal has high requirements for the dust removal distance. The dust removal effect is best when the dust removal device is about 2mm away from the material. The ultrasonic dust removal device has a good effect on the dust removal of flat materials, but for concave-convex materials, the distance between the dust removal device and the material is much greater than 2mm, and the high-speed airflow waveform of the flat band ultrasonic wave is severely attenuated, which affects the breaking of the viscous layer on the surface of the material and reduces the dust removal efficiency. Therefore, whether it is gas dust removal or ultrasonic dust removal, the dust removal cleanliness rate and efficiency of the dust in the concave area are low, so we need to design a dust removal device that can effectively remove dust from concave-convex surface parts. Summary of the invention

[0004] The present application provides a dust removal device to solve the problem of poor dust removal effect on the concave surface of concave-convex surface materials in the prior art.

[0005] The present application provides a dust removal device, comprising: A housing is formed with a dust removal chamber, and the dust removal chamber has an open window; An air jet assembly is disposed in the dust removal chamber and is capable of rotating about a preset axis, with an air jet end of the air jet assembly facing the open window; The dust suction part is arranged on the shell body and is located around the jetting component.

[0006] In one possible design, the jet assembly includes: A fixing seat, arranged on the shell; The rotating seat is rotatably matched with the fixed seat, the fixed seat and the rotating seat are provided with a first airway, and the rotating seat can rotate around the axis of the first airway; The nozzle is arranged on the rotating seat, and a second air passage is opened on the nozzle, which is connected with the first air passage. When the compressed gas is ejected from the second air passage, a torque can be generated to make the nozzle drive the rotating seat to rotate around the axis of the first air passage.

[0007] In a possible design, a third air channel is provided on the nozzle, and the axis of the third air channel is arranged along the tangent direction of the rotating seat; And / or, the orthographic projection of the axis of the second airway on a preset plane coincides with or forms an acute angle with the tangent direction of the rotating seat, and the preset plane is a plane perpendicular to the axis of the first airway.

[0008] In a possible design, the second air passage includes a tapered section and an increasing section, the diameter of the tapered section gradually decreases, the diameter of the increasing section gradually increases, and a narrow hole is formed at the connection between the tapered section and the increasing section.

[0009] In one possible design, the housing includes: shell; The inner shell is located on the inner side of the outer shell, and a dust removal chamber is formed on the side of the inner shell away from the outer shell. A negative pressure cavity is formed between the outer shell and the inner shell, and the edge of the outer shell and the edge of the inner shell form a dust suction part. The negative pressure cavity is used to communicate with the negative pressure device, and the dust suction part is located around the dust removal chamber; The connecting part is arranged between the outer shell and the inner shell and is used to connect the outer shell and the inner shell. The fixing seat is installed on the connecting part. The connecting part is provided with an air inlet communicated with the first air channel, and the air inlet is used to communicate with the air compressor.

[0010] In a possible design, a first arc portion is formed on an edge of the inner shell.

[0011] In a possible design, a second arc portion is formed on an edge of the housing.

[0012] In a possible design, the first arc-shaped portion is recessed toward the outer shell; and the second arc-shaped portion is recessed toward the inner shell.

[0013] In a possible design, the device further includes a static eliminator, which is disposed on the inner shell.

[0014] In one possible design, the device further includes: A negative pressure pipe fitting is arranged on the surface of the housing, one end of the negative pressure pipe fitting is connected to the negative pressure chamber, and the other end is used to connect to the negative pressure device; The quick-connect connector is arranged on the surface of the shell, one end of which is connected to the air inlet duct and the other end of which is used to connect to the air compressor.

[0015] The beneficial effects of this application are as follows: The dust removal device of the present application has the jet end of the jet assembly facing the open window. By rotating the jet assembly around a preset axis, the jet end can be rotated around the preset axis, thereby forming a continuously rotating airflow, achieving the cleaning of the concave and convex material surface with less power and energy consumption, and having high dust removal efficiency. By arranging the dust suction part around the jet assembly, the dust blown up by the airflow can be sucked away in time to prevent secondary dust pollution. The dust removal device has a simple structure, a compact structure, and is easy to assemble. The components are installed in an integrated manner, the number of components is reduced, production costs are saved, assembly efficiency is improved, and benefits are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the structure of the dust removal device provided in the embodiment of the present application Figure 1 ; Figure 2 A schematic diagram of the structure of the dust removal device provided in the embodiment of the present application Figure 2 ; Figure 3 A schematic diagram of the internal structure of a dust removal device provided in an embodiment of the present application; Figure 4 A top view of a rotating seat and a nozzle of a dust removal device provided in some embodiments of the present application after being assembled; Figure 5 A top view of a rotating seat and a nozzle of a dust removal device after being assembled provided in other embodiments of the present application; Figure 6 A schematic diagram of the structure of the shell of the dust removal device provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of the nozzle of the dust removal device provided in an embodiment of the present application.

[0018] Reference numerals: 100, shell; 110, outer shell; 120, inner shell; 130, connecting part; 140, dust removal chamber; 150, negative pressure chamber; 160, first arc-shaped part; 170, second arc-shaped part; 200, dust suction part; 210, negative pressure hole; 300, jet assembly; 310, fixed seat; 320, rotating seat; 330, nozzle; 340, adapter ring; 350, air inlet; 360, first air duct; 370, adapter air duct; 380, second air duct; 381, tapered section; 382, ​​gradually increasing section; 383, narrow hole; 390, third air duct; 400, static eliminator; 410, mounting boss; 500, negative pressure pipe fitting; 600, quick-connect connector. DETAILED DESCRIPTION

[0019] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] Combine the following Figure 1-Figure 7 , describing the dust removal device provided in an embodiment of the present application.

[0021] Reference Figure 1 , Figure 2 As shown, a dust removal device provided in an embodiment of the present application includes a shell 100, an injection assembly 300 and a dust suction part 200, and a dust removal chamber 140 is formed on the shell 100, and the dust removal chamber 140 has an open window; for example, the shell 100 is rectangular or circular or other shapes, and one end of the shell 100 is open to form an open window for approaching the surface of the part to be dusted; the injection assembly 300 is arranged in the dust removal chamber 140 and can rotate around a preset axis, and the injection end of the injection assembly 300 faces the open window for blowing air toward the surface of the part to be dusted; the dust suction part 200 is arranged on the shell 100, located around the injection assembly 300, and is used to suck away dust and gas together to prevent the dust blown off from the part to be dusted from causing secondary pollution to it.

[0022] Reference Figure 3As shown, in some embodiments provided in the present application, the jet assembly 300 includes a fixed seat 310, a rotating seat 320 and a nozzle 330, the fixed seat 310 is fixedly mounted on the housing 100; the rotating seat 320 and the fixed seat 310 are rotatably matched through a bearing, and a first air channel 360 is respectively opened on the fixed seat 310 and the rotating seat 320, and the first air channel 360 is connected to the air compressor. The first air channel 360 is a cylindrical hole, and the axis of the cylindrical hole coincides with the axis of the bearing. When the rotating seat 320 rotates around the axis of the first air channel 360, the axial connection between the two first air channels 360 is not affected; the nozzle 330 is arranged on the outer side of the rotating seat 320, for example, An adapter ring 340 is sleeved on the outer side of the rotating seat 320, and a radial adapter air channel 370 is opened on the adapter ring 340. The nozzle 330 is installed on the adapter ring 340. A second air channel 380 is opened on the nozzle 330. The second air channel 380 is a cylindrical hole. The second air channel 380 is connected with the first air channel 360 through the adapter air channel 370. When the compressed gas is ejected from the second air channel 380, a reverse thrust can be generated on the nozzle 330. The reverse thrust has a component force along the tangential direction of the rotating seat 320, so that a torque can be generated to drive the nozzle 330 to rotate around the axis of the first air channel 360, thereby causing the nozzle 330 to rotate automatically.

[0023] Reference Figure 4 As shown, in some specific embodiments, a third air channel 390 is provided on the nozzle 330, and the third air channel 390 is connected to the second air channel 380, and the axis of the third air channel 390 is arranged along the tangent direction of the rotating seat 320, so that when the compressed gas passes through the second air channel 380, part of the compressed gas will flow into the third air channel 390 and be ejected from the third air channel 390. Since the axis of the third air channel 390 is along the tangent direction of the rotating seat 320, and the gas generates inertia when it flows out, when the gas leaves the nozzle 330, the inertia will make the gas maintain a certain speed after flowing out, and the inertial force will push the nozzle 330 to rotate in the opposite direction, so that the automatic rotation of the nozzle 330 can be realized. In some specific embodiments, the end of the nozzle 330 is inclined toward the housing 100, that is, the direction of the airflow ejected from the nozzle 330 is obliquely outward, which is conducive to making the dust flow in the direction close to the housing 100, so that it is convenient for the dust suction part 200 to quickly suck away the dust and gas.

[0024] Reference Figure 5As shown, in some specific embodiments, the orthographic projection of the axis of the second air channel 380 on the preset plane coincides with the tangent direction of the rotating seat 320 or forms an acute angle, and the preset plane is a plane perpendicular to the axis of the first air channel 360; wherein, when the orthographic projection of the axis of the second air channel 380 on the preset plane coincides with the tangent direction of the rotating seat 320, the end of the nozzle 330 faces the rear side of the rotating seat 320, that is, the direction of the airflow ejected from the nozzle 330 is obliquely backward, and the obliquely backward airflow generates a forward propulsion force on the nozzle 330, so that the nozzle 330 can maintain rotation; when the second air channel 380 is projected on the preset plane, the orthographic projection of the axis of the second air channel 380 on the preset plane coincides with the tangent direction of the rotating seat 320, the end of the nozzle 330 faces the rear side of the rotating seat 320, that is, the direction of the airflow ejected from the nozzle 330 is obliquely backward, and the obliquely backward airflow generates a forward propulsion force on the nozzle 330, so that the nozzle 330 can maintain rotation; When the orthographic projection of the axis of the second air duct 380 on the preset plane forms an acute angle with the tangent direction of the rotating seat 320, for example, the angle between the orthographic projection of the axis of the second air duct 380 on the preset plane and the tangent direction of the rotating seat 320 is 60°, at this time, the end of the nozzle 330 is toward the rear side of the rotating seat 320 and also outward toward the shell 100, that is, the direction of the airflow ejected from the nozzle 330 is obliquely backward and obliquely outward, which can maintain the rotation of the nozzle 330 while facilitating the dust to flow in the direction close to the shell 100, thereby facilitating the dust suction unit 200 to quickly suck away the dust and gas.

[0025] In some specific embodiments, the number of nozzles 330 can be multiple, for example, the number of nozzles 330 is two, and the two nozzles 330 are centrally symmetrically arranged relative to the rotating seat 320, thereby increasing the ejection position of the airflow and improving the dust removal efficiency. In some specific embodiments, the distance between one of the two nozzles 330 and the rotating seat 320 is different from the distance between the other nozzle 330 and the rotating seat 320, so that two cleaning rings can be formed, which is conducive to increasing the dust removal area and improving the cleaning efficiency and cleanliness.

[0026] As shown in Reference 7, in some embodiments provided in the present application, the second air duct 380 includes a tapered section 381 and an increasing section 382, ​​the diameter of the tapered section 381 gradually decreases, the diameter of the increasing section 382 gradually increases, and a narrow hole 383 is formed at the position where the tapered section 381 and the increasing section 382 are connected. In the tapering section 381, the airflow follows the principle that "when the fluid moves in the tube, the flow velocity is high where the cross-section is small, and the flow velocity is low where the cross-section is large", so the airflow is continuously accelerated, and when it reaches the narrow hole 383, the flow velocity has exceeded the speed of sound; while the transonic fluid no longer follows the principle that "the flow velocity is high where the cross-section is small, and the flow velocity is low where the cross-section is large" when moving, but on the contrary, the larger the cross-section, the faster the flow velocity; therefore, in the increasing section 382, ​​the speed of the airflow is further accelerated to 2-3 km / s, which is equivalent to 7-8 times the speed of sound, thereby effectively increasing the flow velocity of the airflow. At the moment when the high-speed compressed gas is ejected from the nozzle 330, the compressed gas will generate ultrasonic waves, which are carried by the airflow to the surface of the dust-removed part, and under the joint action of the ultrasonic wave and the high-speed airflow, the dust on the surface of the dust-removed part is fully vibrated, and the vibrated suspended dust merges with the airflow and is sucked away by the dust suction part 200 on the shell 100 along with the airflow, thereby completing efficient dust removal. Especially when used for dust removal on concave and convex surfaces, under the combined action of ultrasonic waves and high-speed airflow, the dust located in the dead corners of the concave surface can also be fully vibrated, thereby breaking the air viscosity layer on the surface of the dust removal component, achieving surface cleaning of concave and convex materials with less power and energy consumption, and achieving good dust removal effect and high efficiency.

[0027] As shown in reference 6, in some embodiments provided in the present application, the shell 100 includes an outer shell 110, an inner shell 120 and a connecting portion 130, the inner shell 120 is located on the inner side of the outer shell 110, and the side of the inner shell 120 away from the outer shell 110 forms a dust removal chamber 140, and a negative pressure cavity 150 is formed between the outer shell 110 and the inner shell 120. Specifically, a negative pressure pipe fitting 500 is installed on the surface of the outer shell 110, one end of the negative pressure pipe fitting 500 is connected to the negative pressure cavity 150, and the other end is connected to the negative pressure device; the edge of the outer shell 110 and the edge of the inner shell 120 form a dust collection portion 200, and specifically, the dust collection portion 200 includes an end plate, and the end plate is connected to the edge of the outer shell 110 and the inner shell 1 The edge of the housing 20 is uniformly provided with negative pressure holes 210 connected to the negative pressure chamber 150 on the end plate. In this way, the dust collecting part 200 is located around the dust removal chamber 140, which can prevent the dust and airflow after the shock from leaking out of the dust removal chamber 140. The connecting part 130 is arranged between the outer shell 110 and the inner shell 120, and is used to connect the outer shell 110 and the inner shell 120. The lower end of the connecting part 130 is provided with a thread groove, and the fixing seat 310 is provided with a thread section. The thread section and the thread groove are threadedly matched to install the fixing seat 310 on the connecting part 130. The connecting part 130 is provided with an air inlet 350 connected to the first air duct 360, and the air inlet 350 is used to connect with the air compressor. Specifically, a quick-connect connector 600 is installed on the surface of the outer shell 110, and one end of the quick-connect connector 600 is connected to the air inlet 350, and the other end is connected to the air compressor. The compressed gas generated by the air compressor enters the air inlet 350 , the first air duct 360 , and the second air duct 380 in sequence through the quick-connect connector 600 , and is finally ejected from the end of the nozzle 330 .

[0028] As shown in reference 6, in some embodiments provided in the present application, a first arc-shaped portion 160 is formed at the edge of the inner shell 120. In this way, it is equivalent to increasing the path of the gas flowing along the surface of the inner shell 120, thereby increasing the speed of the airflow. The airflow speed is inversely proportional to the gas pressure. Therefore, the airflow speed of the first arc-shaped portion 160 is relatively large and the pressure is relatively small. On the one hand, it is beneficial to accelerate the gas carrying dust in the dust removal chamber 140 to flow toward the negative pressure hole 210, speed up the dust discharge, and increase the dust collection speed; on the other hand, after the gas pressure is reduced, it can reduce the influence of the dust's own weight and the dust cohesion on the fusion state of dust and gas, so that the dust and gas can be better fused, preventing the dust from being carried away by the airflow due to excessive gravity, and improving the dust removal cleanliness rate. In some embodiments, the first arc-shaped portion 160 is recessed toward the outer shell 110. By making the first arc-shaped portion 160 recessed toward the outer shell 110, the wall thickness of the inner shell 120 can be reduced, thereby shortening the distance between the negative pressure hole 210 and the dust removal chamber 140, so that a strong negative pressure can be maintained near the arc surface of the first arc-shaped portion 160, so that dust can enter the negative pressure chamber 150 as soon as possible. In some embodiments, the first arc-shaped portion 160 can also be designed to protrude from the arc surface of the inner shell 120.

[0029] In order to prevent the airflow ejected from the nozzle 330 from driving part of the dust to overflow the housing 110 and cause secondary pollution, as shown in Figure 6, in some embodiments provided in the present application, a second arc portion 170 is formed on the edge of the housing 110. In this way, it is equivalent to increasing the path of the gas flowing along the surface of the housing 110, thereby increasing the speed of the airflow. The airflow speed is inversely proportional to the gas pressure. Therefore, the speed of the airflow in the second arc portion 170 is relatively large and the pressure is relatively small. On the one hand, it is conducive to the dust overflowing the housing 110 to flow toward the negative pressure hole 210 with the gas acceleration; on the other hand, after the gas pressure is reduced, it can reduce the influence of the dust's own weight and the dust cohesion on the fusion state of the dust and the gas, so that the dust and the gas can be better fused, preventing the dust from being carried away by the airflow due to excessive gravity, and improving the dust removal cleanliness rate. In some embodiments, the second arc-shaped portion 170 is recessed toward the inner shell 120. By making the second arc-shaped portion 170 recessed toward the inner shell 120, the wall thickness of the outer shell 110 can be reduced, thereby shortening the distance between the negative pressure hole 210 and the outer side of the outer shell 110, so that a strong negative pressure can be maintained near the arc surface of the second arc-shaped portion 170, so that dust can enter the negative pressure chamber 150 as soon as possible. In some embodiments, the second arc-shaped portion 170 can also be designed to protrude from the arc surface of the outer shell 110.

[0030] As shown in reference 3, in some embodiments provided in the present application, the device further includes an electrostatic eliminator 400, which is disposed on the inner shell 120. Specifically, a mounting boss 410 is disposed on the inner shell 120, and the electrostatic eliminator 400 is mounted on the mounting boss 410. The electrostatic eliminator 400 can release the charge when connected to a power source, neutralize the charge on the surface of the dust-removed part, prevent static electricity from adsorbing dust, and facilitate the dust to fall off the surface of the dust-removed part. In other embodiments, the electrostatic eliminator 400 can also be installed at a position close to the negative pressure port of the outer shell 110.

[0031] Working principle of the dust removal device of this application: The compressed air is ejected from the nozzle 330 through the air inlet 350, the first air duct 360, and the second air duct 380 to produce a high-speed airflow and ultrasonic waves. At the same time, the airflow pushes the nozzle 330 to rotate in the reverse direction. The high-speed airflow with ultrasonic waves acts on the surface of the dust-removing part, breaks the air viscosity layer, and loosens the dust particles attached to the surface of the dust-removing part. The static eliminator 400 can release the charge when connected to the power supply, and neutralize the charge of the dust electrostatically adsorbed on the surface of the dust-removing part; at the same time, the negative pressure port of the negative pressure chamber 150 generates air flow to form a negative pressure area, and the dust-carrying airflow is accelerated in this area and enters the negative pressure chamber 150 to absorb the gas carrying dust particles. At the same time, the airflow outside the dust removal chamber 140 is accelerated in this area and enters the negative pressure chamber 150 to absorb the gas carrying dust particles overflowing from the shell 100, thereby realizing efficient cleaning and dust removal of the surface of the dust-removing part. After the gas in the negative pressure chamber 150 passes through the filter unit to complete the filtration of the dust-carrying air, the clean discharge of the air is realized, thereby reducing pollution to the environment.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0036] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A dust removal device, characterized in that: include: A housing, wherein the housing is formed with a dust removal chamber, and the dust removal chamber has an open window; An air jet assembly is disposed in the dust removal chamber and is rotatable about a preset axis, with an air jet end of the air jet assembly facing toward the open window; The dust suction part is arranged on the shell and is located around the jetting component.

2. The dust removal device according to claim 1, characterized in that: The jet assembly comprises: A fixing seat, arranged on the housing; A rotating seat, which is rotatably matched with the fixed seat, wherein the fixed seat and the rotating seat are provided with a first air passage, and the rotating seat can rotate around the axis of the first air passage; The nozzle is arranged on the rotating seat, and a second air passage is opened on the nozzle. The second air passage is connected with the first air passage. When the compressed gas is ejected from the second air passage, a torque can be generated to make the nozzle drive the rotating seat to rotate around the axis of the first air passage.

3. The dust removal device according to claim 2, characterized in that: A third air passage is provided on the nozzle, and the axis of the third air passage is arranged along the tangent direction of the rotating seat; And / or, the orthographic projection of the axis of the second airway on a preset plane coincides with or forms an acute angle with the tangent direction of the rotating seat, and the preset plane is a plane perpendicular to the axis of the first airway.

4. The dust removal device according to claim 2 or 3, characterized in that: The second air channel includes a gradually contracting section and a gradually increasing section, the diameter of the gradually contracting section gradually decreases, the diameter of the gradually increasing section gradually increases, and a narrow hole is formed at the position where the gradually contracting section connects with the gradually increasing section.

5. The dust removal device according to claim 4, characterized in that: The housing comprises: shell; An inner shell is located on the inner side of the outer shell, a side of the inner shell away from the outer shell forms the dust removal chamber, a negative pressure cavity is formed between the outer shell and the inner shell, an edge of the outer shell and an edge of the inner shell form the dust collection part, the negative pressure cavity is used to communicate with the negative pressure device, and the dust collection part is located around the dust removal chamber; The connecting part is arranged between the outer shell and the inner shell, and is used to connect the outer shell and the inner shell. The fixing seat is installed on the connecting part. The connecting part is provided with an air inlet duct connected with the first air duct, and the air inlet duct is used to connect with the air compressor.

6. The dust removal device according to claim 5, characterized in that: The edge of the inner shell is formed with a first arc portion.

7. The dust removal device according to claim 6, characterized in that: A second arc portion is formed at the edge of the housing.

8. The dust removal device according to claim 7, characterized in that: The first arc-shaped portion is recessed toward the outer shell; and the second arc-shaped portion is recessed toward the inner shell.

9. The dust removal device according to claim 8, characterized in that: It also includes a static eliminator, which is arranged on the inner shell.

10. The dust removal device according to claim 8, characterized in that: Also includes: A negative pressure pipe, which is arranged on the surface of the shell, one end of which is connected to the negative pressure chamber, and the other end of which is used to communicate with the negative pressure device; A quick-connect connector is arranged on the surface of the shell, one end of which is connected to the air inlet duct and the other end of which is used to connect to the air compressor.

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