Dust collection device having air nozzle

Abstract

A dust collection device having an air nozzle, the dust collection device comprising: a turbine; a transition member, which is mounted on the turbine and has a third duct in communication with the turbine; a driving member, which is mounted inside the transition member and has a front shaft end and a rear shaft end, a cutting member being mounted on the front shaft end, and the rear shaft end being connected to the turbine; and a dust collection cover, which is mounted on the transition member and comprises a base, a main cover body, an air blowing nozzle assembly and an opening adjustment member, wherein the main cover body is located below the base, several suction openings are formed at the bottom of the main cover body, the opening adjustment member is sleeved at the bottom of the main cover body, the opening adjustment member is rotatable relative to the main cover body, and the air blowing nozzle assembly is mounted inside the main cover body and comprises a plurality of air pipes and a plurality of air nozzles. The device solves the problems of existing dust collection devices having insufficient suction force and being unable to adjust air volume as required, and can maximize the dust collection efficiency.

Description

Dust collection device with air nozzle Related applications

[0001] The present application claims priority to Chinese Patent Application No. 2024219409048, filed on August 12, 2024, entitled “Dust collection device with air nozzle”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of dust collection equipment, and in particular, relates to a dust collection device with an air nozzle. BACKGROUND

[0003] In the field of wood processing, it is often necessary to clean the dust and debris after cutting. In wood processing, wood dust is usually cleaned using a dedicated dust collection device to efficiently collect and remove wood dust generated during processing to maintain a clean and safe working environment.

[0004] Although conventional dust collection devices can adsorb wood dust and dust to some extent, they cannot effectively clean a large amount of or long-distance debris due to insufficient suction in actual applications. This problem of insufficient suction is particularly evident in wood processing environments, where the size and density of debris generated during wood processing vary, and different cleaning tasks may require different wind power and dust collection strategies. Further, the existing dust collection device air inlet cannot be adjusted according to actual needs, limiting the cleaning efficiency and scope of application, which not only affects the efficiency of the cleaning work, but also may increase the maintenance cost of the equipment. For example, patent CN220212819U discloses a axial-flow centrifugal composite dust collection device, which has the above-mentioned problems.

[0005] In view of this, there is a need to improve the existing dust collection device. SUMMARY

[0006] To address the shortcomings of the related art, the present disclosure provides a dust collection device with an air nozzle, which solves the problems of insufficient suction and inability to adjust the air volume according to the needs of the existing dust collection device to maximize dust collection efficiency. The implementation of the technical solution is as follows:

[0007] The dust collecting device with air nozzle comprises a turbine, a transition piece mounted on the turbine, the transition piece having a third channel communicating with the turbine, a driving piece mounted inside the transition piece, the driving piece having a front shaft end and a rear shaft end, the front shaft end being provided with a cutting piece, and the rear shaft end being connected with the turbine, and a dust collecting cover mounted on the transition piece, the dust collecting cover comprising a base, a main cover body, an air blowing nozzle assembly and an opening adjusting piece, the main cover body being located below the base, the bottom of the main cover body being provided with a plurality of suction openings, the opening adjusting piece being sleeved on the bottom of the main cover body and being rotatable relative to the main cover body, and the air blowing nozzle assembly being mounted inside the main cover body and comprising a plurality of air pipes and a plurality of air nozzles.

[0008] Preferably, the opening adjusting piece is provided with a plurality of stoppers, and the stoppers are uniformly arranged at equal intervals around the axis of the opening adjusting piece.

[0009] Preferably, the stoppers correspond to the positions of the suction openings.

[0010] Preferably, the dust collecting cover further comprises a telescopic adjusting ring, and the telescopic adjusting ring is rotatably connected with the base and the main cover body respectively.

[0011] Preferably, one end of the air pipe is mounted on the inner wall of the main cover body, the air pipe extends from the inner wall of the main cover body to the middle part of the main cover body, and the other end of the air pipe is provided with an air nozzle.

[0012] Preferably, the dust collecting cover further comprises a sealing ring, and the sealing ring is sleeved outside the telescopic adjusting ring.

[0013] Preferably, the turbine comprises an impeller, the impeller is provided with three layers of blades, the first layer comprises a plurality of first blades, the second layer comprises a plurality of second blades, and the third layer comprises a plurality of third blades, the first blades and the second blades are axial flow blades, and the third blades are composite blades.

[0014] Preferably, each layer of blades of the impeller is provided with 3-23 blades, and the blades of each layer are uniformly arranged at equal intervals around the axis of the impeller along a circumferential path.

[0015] Preferably, the transition piece comprises an outer shell, an inner shell and a plurality of partition parts, the inner shell is arranged in the outer shell, the partition parts are connected between the outer shell and the inner shell, and the third channel is formed between adjacent partition parts.

[0016] Preferably, the driving piece has two output shafts, the end close to the dust collecting cover is the front shaft end, and the end away from the transition piece is the rear shaft end.

[0017] The beneficial effects of the present disclosure are:

[0018] One, a plurality of air pipes and air nozzles are arranged in the dust cover and are uniformly distributed around the cutting member. When the device is working, the air nozzles blow air flow through an external air pump, so that the dust and debris generated when the cutting member cuts the plate are lifted, and the dust and debris flow out through the turbine in the dust collection device.

[0019] Secondly, the air inlet amount at the bottom of the main cover body can be adjusted by the cooperation of the suction opening and the opening adjusting piece. The opening adjusting piece can rotate relative to the main cover body. The stop block of the opening adjusting piece corresponds to the suction opening, so that the stop block can not block, partially block and completely block the suction opening, thereby adjusting the air inlet amount and maximizing the dust collection efficiency.

[0020] Thirdly, the dust or debris enters the turbine through the third channel, and the dust or debris is formed into a rotating state around the shaft center through the front rectifier piece, so that the dust or debris smoothly enters the impeller, improves the efficiency, and increases the speed of the dust or debris through the first blade and the second blade to generate greater flow. Through the pressurization and push-out of the third blade, the dust or debris has a high pressure and high flow rate. When passing through the diffuser section, the dust or debris is stably diffused by increasing the cross-sectional area, reducing the instability of the dust or debris caused by excessive speed, thereby reducing the noise of the dust collection device, and finally flowing out of the turbine. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present disclosure and form a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions serve to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0022] FIG. 1 is an exploded view of the first perspective of the present disclosure;

[0023] FIG. 2 is an exploded view of the second perspective of the present disclosure;

[0024] FIG. 3 is an exploded view of the turbine of the present disclosure;

[0025] FIG. 4 is a cross-sectional view of the impeller of the present disclosure;

[0026] FIG. 5 is a structural schematic view of the dust cover of the present disclosure;

[0027] FIG. 6 is an exploded view of the dust cover of the present disclosure.

[0028] Explanation of reference numerals: 1, turbine; 11, volute; 111, first duct; 112, front fairing; 113, rear fairing; 114, input section; 115, acceleration section; 116, pressurization section; 117, diffuser section; 118, second duct; 119, output section; 12, middle cone; 13, rotating member; 14, impeller; 141, first blade; 142, second blade; 143, third blade; 144, rotating part; 1441, shaft hole; 1442, acceleration part; 1443, pressurization part; 15, tail cone; 2, transition member; 21, front cone; 22, outer shell; 23, partition part; 24, inner shell; 241, third duct; 3, driving member; 31, front shaft end; 32, rear shaft end; 33, cutting member; 4, dust cover; 41, base; 411, second protrusion; 412, first fixing hole; 42, main cover body; 421, suction opening; 422, first protrusion; 423, third protrusion; 424, third fixing hole; 425, air inlet hole; 43, air blowing nozzle assembly; 431, air pipe; 432, air nozzle; 4321, jetting section; 44, telescopic adjusting ring; 441, second groove; 442, third inclined groove; 443, first strip-shaped hole; 45, sealing ring; 451, second fixing hole; 46, opening adjusting member; 461, stop block; 462, first groove; 463, second strip-shaped hole. DETAILED DESCRIPTION

[0029] In the following, a plurality of embodiments of the present disclosure will be disclosed with reference to the drawings. For the purpose of clear illustration, many practical details will be described in the following description. However, it should be appreciated that these practical details should not be used to limit the present disclosure. That is, in some embodiments of the present disclosure, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional and commonly used structures and members will be shown in the drawings in a simple schematic manner.

[0030] It should be noted that all directional indications such as upper, lower, left, right, front, back, etc. in the embodiments of the present disclosure are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, the descriptions such as "first", "second" and the like in the present disclosure are only for the purpose of description, and are not intended to particularly indicate the order or sequence, nor to limit the present disclosure, which are merely to distinguish the items or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present disclosure.

[0032] In order to further understand the content, characteristics and effects of the present disclosure, the following examples are listed and described in detail as follows with reference to the accompanying drawings:

[0033] Referring to FIG. 1 and FIG. 2, a dust collection device with an air nozzle according to the present disclosure includes a turbine 1, a transition piece 2, a driving piece 3 and a dust collection cover 4, wherein the transition piece 2 is installed on the turbine 1, the driving piece 3 is installed inside the transition piece 2, the driving piece 3 is installed with a cutting piece 33, the dust collection cover 4 is installed on the transition piece 2, and when the device is working, the driving piece 3 is powered on to drive the turbine 1 and the cutting piece 33 to work, the dust or debris generated during cutting of the plate material is lifted, enters the transition piece 2 through the dust collection cover 4, and is then sucked away by the suction force generated by the turbine 1. The airflow is guided, accelerated, pressurized and expanded through the transition piece 2 and the turbine 1, and finally carries the dust and debris out of the turbine 1. The present disclosure can be used in the use scenario of plate cutting, but is not limited to plate cutting, and can be retrofitted and applied to any device that generates dust or debris.

[0034] Referring to FIG. 3, the turbine 1 includes a volute 11, an intermediate cone 12, a rotating piece 13, an impeller 14 and a tail cone 15, wherein the intermediate cone 12 is installed inside the volute 11, the rotating piece 13 is installed on the intermediate cone 12, the impeller 14 is installed on the rotating piece 13, the tail cone 15 is installed inside the volute 11, and the tail cone 15 is connected with the impeller 14; the intermediate cone 12, the rotating piece 13, the impeller 14 and the tail cone 15 are coaxially arranged inside the volute 11.

[0035] Specifically, the volute 11 comprises a first duct 111, a front fairing 112, a rear fairing 113, an input section 114, an acceleration section 115, a pressurizing section 116, a diffuser section 117, a second duct 118 and an output section 119; the input section 114 is a flared bowl structure, the side wall of which is an outwardly convex arc structure, both ends of the input section 114 are provided with circular openings, the diameters of the openings at both ends of the input section 114 are different, the end with the smaller diameter is the small end, the small end of the input section 114 is integrally connected with one end of the acceleration section 115, the acceleration section 115 is a cylindrical structure, both ends of the acceleration section 115 are also provided with openings, the pressurizing section 116 is a flared bowl structure, the side wall of which is an outwardly convex arc structure, both ends of the pressurizing section 116 are provided with circular openings, the diameters of the openings at both ends of the pressurizing section 116 are different, the end with the smaller diameter is the small end, the small end of the pressurizing section 116 is integrally connected with the other end of the acceleration section 115, the diffuser section 117 is a horn-shaped structure, both ends of the diffuser section 117 are provided with openings, the diameters of the openings at both ends of the diffuser section 117 are different, the end with the larger diameter is the large end, the large end of the diffuser section 117 is integrally connected with the large end of the pressurizing section 116, the output section 119 is a cylindrical structure, both ends are provided with openings, the small end of the diffuser section 117 is integrally connected with one end of the output section 119.

[0036] Specifically, the front fairing 112 of the volute 11 is provided with a plurality of arc-shaped blades, the front fairing 112 is arranged inside the input section 114 of the volute 11 and is fixedly connected with the input section 114, and the plurality of front fairings 112 are arranged at equal intervals around the axis direction of the input section 114. The middle cone 12 is arranged inside the input section 114, the middle cone 12 is a rotating body, the outer wall of the middle cone 12 is arc-shaped and corresponds to the shape of the outer shell of the input section 114, and in the installed state, a channel is formed between adjacent two front fairings 112 and the middle cone 12, i.e. the first duct 111, which is used for flow guiding to enable dust or debris to enter the acceleration section 115 from the first duct 111.

[0037] Referring to FIG. 4, the impeller 14 is provided with multiple layers of blades, part of the layers of blades are composite blades, and part of the layers of blades are axial flow blades. In the embodiment, the impeller 14 is a rotating body, and the impeller 14 is sequentially and spacedly provided with three layers of blades along the axial direction. The first layer includes a plurality of first blades 141, the second layer includes a plurality of second blades 142, and the third layer includes a plurality of third blades 143. Meanwhile, the impeller 14 further includes a rotating part 144, wherein the rotating part 144 is provided with a shaft hole 1441 for connecting the rotating shaft, the shaft hole 1441 penetrates the rotating part 144 along the axial direction of the rotating part 144, and the rotating part 144 includes an acceleration part 1442 and a pressurization part 1443 which are integrally connected. The acceleration part 1442 is arranged in the acceleration section 115 and has a rod-shaped structure. The first blades 141 and the second blades are fixedly connected to the side wall of the acceleration part 1442. The pressurization part 1443 is arranged in the pressurization section 116. The diameter of the end of the pressurization part 1443 away from the acceleration part 1442 is greater than the diameter of the other end. The pressurization part 1443 is connected to one end of the acceleration part 1442 and has a diameter equal to that of the acceleration part 1442. The side wall of the pressurization part 1443 has an arc-shaped structure. The third blades 143 are fixedly connected to the side wall of the pressurization part 1443. The radial length of the third blades 143 is greater than that of the first blades 141 or the second blades 142.

[0038] Specifically, each layer of blades of the impeller 14 is provided with 3-23 blades, preferably 7 blades, which are uniformly and equidistantly arranged along the circumferential direction of the outer wall of the rotating part 144. The first blades 141 and the second blades 142 are axial flow blades, which make the direction of the dust or debris along the axial direction, so as to improve the flow rate of the dust or debris. The third blades 143 are composite blades, i.e. mixed flow blades, which specifically include an axial flow section and a centrifugal section. The third blades 143 are used to improve the flow rate and pressure of the dust or debris and reduce the disturbance of the dust or debris, so as to expand the flow direction to the diffuser section.

[0039] Referring to FIG. 3, the rear fairing 113 of the volute 11 is provided with a plurality of arc-shaped blades. The rear fairing 113 is arranged in the interior of the diffuser section 117 and is fixedly connected to the diffuser section 117. The plurality of rear fairings 113 are uniformly and equidistantly arranged around the axial direction of the diffuser section 117.

[0040] Specifically, the tail cone 15 is arranged in the interior of the diffuser section 117. The tail cone 15 has a conical structure. The side wall of the tail cone 15 is fixedly connected to the rear fairing 113. The large end of the tail cone 15 is connected to the large end of the pressurization part 1443. In the installed state, the adjacent two rear fairings 113 and the tail cone 15 form a channel, i.e. the second channel 118. The dust or debris enters the output section 119 from the second channel 118. Since the cross-sectional area of the second channel 118 gradually increases, the dust or debris is expanded.

[0041] Referring to FIG. 1 and FIG. 2, the transition piece 2 comprises an outer shell, an inner shell 24, a partition 23 and a front cone 21, wherein the outer shell is a cylindrical structure with both ends open, the cross section of the outer shell is circular, the inner shell 24 is installed inside the outer shell, the inner shell 24 is also a cylindrical structure and both ends of the inner shell 24 are also provided with openings, and a gap is provided between the inner shell 24 and the outer shell; the partition 23 is provided with a plurality of partitions 23, the partition 23 is a long strip-shaped plate, the partition 23 is arranged in the gap between the inner shell 24 and the outer shell, and the partition 23 is arranged along the length direction of the inner shell 24 and the outer shell, the partition 23 is fixedly connected with the inner shell 24 and the outer shell, so that the inner shell 24 can be kept relatively fixed with the outer shell in position, and the third channel 241 is formed between adjacent partitions 23, the third channel 241 is communicated with the turbine 1, and the front cone 21 is arranged inside the dust cover 4, the front cone 21 is a conical structure, the large end of the front cone 21 is connected with one end of the outer shell away from the turbine 1, and the front cone 21 is used for making dust or debris flow to the third channel 241.

[0042] Referring to FIG. 1 and FIG. 2, the driving piece 3 adopts a double-shaft motor, the driving piece 3 is fixedly installed in the inner shell 24 of the transition piece 2, the shaft of the driving piece 3 is arranged along the axis direction of the inner shell 24, the driving piece 3 has two output shafts, the end close to the dust cover 4 is the front shaft end 31, and the end away from the transition piece 2 is the rear shaft end 32, the front shaft end 31 of the driving piece 3 is installed with a cutting piece 33, and the rear shaft end 32 of the driving piece 3 is connected with the turbine 1, in this embodiment, the cutting piece 33 is a milling cutter, and the driving piece 3 can drive the milling cutter to rotate when the driving piece 3 works, so as to realize the function of cutting the wood board.

[0043] Referring to FIG. 1, FIG. 5 and FIG. 6, the dust cover 4 is installed at the opening of the outer shell close to the front shaft end 31, and the dust cover 4 comprises a base 41, a main cover body 42, a blowing nozzle assembly 43, a telescopic adjusting ring 44 and an opening adjusting piece 46, the main cover body 42 is located below the base 41, the bottom of the main cover body 42 is provided with a plurality of suction openings 421, the opening adjusting piece 46 is sleeved on the bottom of the main cover body 42, the opening adjusting piece 46 can rotate relative to the main cover body 42, the blowing nozzle assembly 43 is installed inside the main cover body 42, and the blowing nozzle assembly 43 comprises a plurality of air pipes 431 and a plurality of air nozzles 432, and the telescopic adjusting ring 44 is rotatably connected with the base 41 and the main cover body 42 respectively.

[0044] Referring to FIG. 5 and FIG. 6, the opening adjusting piece 46 is provided with a plurality of stop blocks 461, the plurality of stop blocks 461 are uniformly arranged at equal intervals around the axis direction of the opening adjusting piece 46, and the stop blocks 461 correspond to the positions of the suction openings 421, since the opening adjusting piece 46 can rotate relative to the main cover body 42, the positions of the stop blocks 461 relative to the suction openings 421 can change, and the stop blocks 461 can not block, partially block or completely block the suction openings 421, so as to adjust the opening degree of the suction openings 421, so as to realize the adjustment of the air inlet amount and finally realize the maximization of the dust collection efficiency.

[0045] Referring to FIG. 6, the bottom of the main cover 42 is provided with a first protrusion 422, and the inner wall of the opening adjusting member 46 is provided with a first groove 462. To facilitate installation and adjustment, the first groove 462 is preferably designed as an "L"-shaped groove. When adjusting the opening degree of the suction opening 421, the first protrusion 422 slides in the first groove 462 by rotating the opening adjusting member 46, so that the area of the baffle 461 shielding the suction opening 421 changes to achieve the adjustment of the air inlet amount; when adjusted to the target position, stop rotating, and the opening adjusting member 46 and the main cover 42 can be fixed by bolts to prevent relative rotation.

[0046] Specifically, the dust cover 4 further comprises a sealing ring 45 sleeved outside the telescopic adjusting ring 44. The sealing ring 45 prevents dust or debris from entering the telescopic adjusting ring 44, avoiding affecting the operation of the telescopic adjusting ring 44, so that the dust cover 4 cannot adjust the length.

[0047] Further, as shown in FIG. 5, one end of the air pipe 431 is installed on the inner wall of the main cover 42, the air pipe 431 extends from the inner wall of the main cover 42 to the middle part of the main cover 42, and the other end of the air pipe 431 is provided with an air nozzle 432. That is, the air nozzle 432 is located at the middle part of the internal space of the main cover 42 to be closer to the cutting member 33, and the shell of the main cover 42 is provided with an air inlet hole 425, the air pipe 431 communicates with the air inlet hole 425, the air nozzle assembly 43 of the present technical solution is connected with the air pump through the air inlet hole 425, the air pump is an external device for providing air source, the pressure of the air source is selected according to the demand, and the air pump is directly obtained from the related art, so the structure of the air pump is not specifically described in the present disclosure.

[0048] Further, as shown in FIG. 5, the air nozzle 432 comprises a jet section 4321 at the end, and to ensure good blowing effect, the included angle between the jet section 4321 and the vertical direction is preferably 10°-20°. Since the number of air pipes 431 and air nozzles 432 is multiple, preferably 4, they are uniformly distributed around the cutting member 33 to achieve the best blowing effect. The purpose of blowing is to lift the dust or debris generated when the cutting member 33 cuts the panel, and the specific implementation process is that the airflow blown out of the air nozzle 432 encounters the panel downward, the airflow rebounds, the airflow direction changes to upward, thereby lifting the dust or debris, so as to be sucked upward by the suction force generated by the turbine 1 in the dust collection device, thus realizing more efficient dust collection effect.

[0049] Referring to FIG. 6, the outer walls of the base 41 and the main cover 42 are respectively provided with a second protrusion 411 and a third protrusion 423, the inner wall of the telescopic adjusting ring 44 is provided with a second groove 441 and a third inclined groove 442, and the second protrusion 411 and the third protrusion 423 are respectively embedded in the second groove 441 and the third inclined groove 442.

[0050] Specifically, the second groove 441 is also provided as an "L"-shaped groove, and the second protrusion 411 and the third protrusion 423 are respectively embedded in the second groove 441 and the third inclined groove 442 to achieve the adjustable position of the base 41 and the telescopic adjusting ring 44 and the adjustable position of the main cover body 42 and the telescopic adjusting ring 44. Since the third inclined groove 442 has an inclined groove in the vertical direction, when the main cover body 42 is rotated, the third protrusion 423 and the third inclined groove 442 will have relative movement in the vertical direction, and in the case that the position of the base 41 is unchanged, the main cover body 42 will be away from or close to the base 41, so as to adjust the relative position of the base 41 and the main cover body 42, and thus the length of the dust cover 4 is changed, and thus the distance between the bottom end of the dust cover 4 and the panel is changed.

[0051] In addition, in order to increase the stability of the adjustment, the second protrusion 411, the third protrusion 423, the second groove 441 and the third inclined groove 442 are all provided with a plurality of.

[0052] Further, referring to FIG. 6, the base 41 is provided with a first fixing hole 412, and the telescopic adjusting ring 44 is provided with a first strip-shaped hole 443; and the first fixing member is used to lock the base 41 and the telescopic adjusting ring 44 after sequentially penetrating through the first strip-shaped hole 443 and the first fixing hole 412.

[0053] In the embodiment provided with the sealing ring 45, the sealing ring 45 is provided with a second fixing hole 451, so that the first fixing member is used to lock the sealing ring 45, the base 41 and the telescopic adjusting ring 44 after sequentially penetrating through the second fixing hole 451, the first strip-shaped hole 443 and the first fixing hole 412.

[0054] Specifically, when the height does not need to be adjusted, the first fixing member is used to lock the base 41, the telescopic adjusting ring 44 and the sealing ring 45 after sequentially penetrating through the second fixing hole 451, the first strip-shaped hole 443 and the first fixing hole 412, so as to prevent the relative position of the base 41 and the main cover body 42 from changing, thereby ensuring the stability of the work; preferably, the first fixing member can be a bolt, the first fixing hole 412 is provided with an internal thread, and the sealing ring 45 is made of rubber material.

[0055] When the height needs to be adjusted, the first fixing member is removed, and the operator manually rotates the main cover body 42 to adjust the relative position of the main cover body 42 and the base 41 in the vertical direction, so as to change the distance between the dust cover 4 and the panel to the required value, thereby increasing the applicability of the dust cover 4 in the technical solution and meeting the needs of different cutting.

[0056] Specifically, the distance between the bottom end of the dust cover 4 and the panel is preferably 0.5mm-3mm.

[0057] Similarly, in order to realize the locking of the main cover body 42 and the opening adjusting piece 46, a third fixing hole 424 is arranged on the bottom of the main cover body 42, a second strip-shaped hole 463 is arranged on the opening adjusting piece 46, and a second fixing piece (not shown) is further arranged, which can be a bolt, the third fixing hole 424 is provided with an internal thread, and the opening adjusting piece 46 and the main cover body 42 are locked by sequentially passing the second fixing piece through the second strip-shaped hole 463 and the third fixing hole 424, and the second fixing piece is removed when the opening degree of the suction opening 421 needs to be adjusted.

[0058] The implementation principle of the present disclosure is that: in use, the wood to be cut is placed on the panel, the cutting piece 33 is in contact with the wood plate to perform a cutting action, the driving piece 3 is started by being energized, the driving piece 3 drives the cutting piece 33 to work to cut the wood plate, and the dust and debris are generated in the dust collection cover 4, at the same time, the driving piece 3 drives the impeller 14 in the turbine 1 to work, so that the impeller 14 rotates at high speed, and the impeller 14 can generate airflow with large air volume and high air pressure, so that the dust and debris on the panel can enter the third channel 241 through the dust collection cover 4 along the airflow, and then flow out of the turbine 1 for collection and treatment.

[0059] When the suction force generated by the turbine 1 is too large, but the air intake is insufficient, a vacuum negative pressure state will be formed in the dust collection cover 4, the dust or debris will be partially suspended and stay, and the dust collection efficiency will be relatively low, so the air intake needs to be increased; at this time, the second fixing piece on the opening adjusting piece 46 is removed, the opening adjusting piece 46 is rotated in the forward direction, so that the opening degree of the suction opening 421 is increased to realize air supplement; when the target position is adjusted, the rotation is stopped, and the opening adjusting piece 46 and the main cover body 42 are fixed by the second fixing piece to prevent relative rotation. When the suction force generated by the turbine 1 is small, but the air intake is too large, the dust or debris may overflow under the action of the air blowing force of the air nozzle 432, and the dust collection efficiency is also relatively low, so the air intake needs to be reduced, at this time, the opening adjusting piece 46 is rotated in the reverse direction, so that the opening degree of the suction opening 421 is reduced; in this way, the air intake is adjusted to maximize the dust collection efficiency.

[0060] The present disclosure has the following beneficial effects:

[0061] Firstly, a plurality of air pipes 431 and air nozzles 432 are arranged in the dust collection cover 4 and are uniformly distributed around the cutting piece 33, when the device works, the air nozzles 432 blow out airflow through an external air pump, so that the dust and debris generated when the cutting piece 33 cuts the plate material are lifted, and the dust and debris flow out of the turbine in the dust collection device.

[0062] Secondly, the air inlet amount of the bottom of the main cover body 42 can be adjusted by the suction opening 421 and the opening adjusting piece 46. The opening adjusting piece 46 can rotate relative to the main cover body 42. The stopper 461 of the opening adjusting piece 46 corresponds to the suction opening 421, so that the stopper 461 can not block, partially block and completely block the suction opening 421, thereby adjusting the air inlet amount and maximizing the dust collection efficiency.

[0063] Thirdly, the dust or debris enters the turbine 1 through the third channel 241, and the dust or debris is formed into a rotating state around the shaft center from the axial flow form by the front rectifier plate 112, so that the dust or debris smoothly enters the impeller 14, improves the efficiency, and the speed of the dust or debris can be improved through the first blade 141 and the second blade 142 to generate greater flow. Through the pressurization and pushing out of the third blade 143, the dust or debris has a high pressure and high flow rate. When passing through the diffuser section 117, the dust or debris is stably diffused by increasing the cross-sectional area, reducing the instability of the dust or debris caused by excessive speed, thereby reducing the noise of the dust collection device, and finally flowing out of the turbine 1.

[0064] In order to verify the dust collection device protected by the present disclosure, the flow and pressure of the dust collection device are tested. The driving motor power is selected as 3Kw, the impeller diameter is 0.125 meters, the volute diameter is 0.13 meters, the total length is 0.45 meters, and the driving motor speed is 24000rpm. The measured inlet static pressure is-6300Pa, the output end air flow is 1700 cubic meters / hour, which is equivalent to the performance effect of a 9-19A type centrifugal fan with a power of 5.5Kw, a volute diameter of 0.8 meters, a total length of 0.6 meters and a speed of 2900rpm.

[0065] The above is only an embodiment of the present disclosure and is not intended to limit the present disclosure. The present disclosure can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present disclosure shall be included in the scope of the claims of the present disclosure.

Claims

1. A dust extraction device with a nozzle, characterized in that It comprises: a turbine (1); a transition piece (2) mounted on the turbine (1), the transition piece (2) having a third channel (241) communicating with the turbine (1); a driving piece (3) mounted inside the transition piece (2), the driving piece (3) having a front shaft end (31) and a rear shaft end (32), the front shaft end (31) being provided with a cutting piece (33), and the rear shaft end (32) being connected with the turbine (1); a dust suction cover (4) mounted on the transition piece (2), the dust suction cover (4) comprising a base (41), a main cover body (42), a blowing nozzle assembly (43) and an opening adjusting piece (46), the main cover body (42) being located below the base (41), the bottom of the main cover body (42) being provided with a plurality of suction openings (421), the opening adjusting piece (46) being sleeved on the bottom of the main cover body (42), the opening adjusting piece (46) being rotatable relative to the main cover body (42), and the blowing nozzle assembly (43) being mounted inside the main cover body (42) and comprising a plurality of air pipes (431) and a plurality of air nozzles (432).

2. A dusting device with air nozzle according to claim 1, characterized in that The opening adjusting piece (46) is provided with a plurality of stop blocks (461), and the stop blocks (461) are uniformly arranged at equal intervals around the axis direction of the opening adjusting piece (46).

3. A dusting device with air nozzle according to claim 2, characterized in that The stop blocks (461) correspond to the positions of the suction openings (421).

4. The dusting device with air nozzle according to claim 1, characterized in that The dust suction cover (4) further comprises a telescopic adjusting ring (44) rotatably connected with the base (41) and the main cover body (42) respectively.

5. The dusting device with air nozzle according to claim 1, characterized in that One end of the air pipe (431) is mounted to the inner wall of the main cover body (42), the air pipe (431) extends from the inner wall of the main cover body (42) to the middle part of the main cover body (42), and the other end of the air pipe (431) is provided with an air nozzle (432).

6. A dusting device with air nozzle according to claim 4, characterized in that The dust suction cover (4) further comprises a sealing ring (45) sleeved outside the telescopic adjusting ring (44).

7. The dusting device with air nozzle according to claim 1, characterized in that The turbine (1) comprises an impeller (14) provided with three layers of blades, a first layer comprising a plurality of first blades (141), a second layer comprising a plurality of second blades (142), and a third layer comprising a plurality of third blades (143), the first blades (141) and the second blades (142) being axial flow blades, and the third blades (143) being composite blades.

8. A dusting device with air nozzle according to claim 7, characterized in that Each layer of blades of the impeller (14) is provided with 3-23 blades, and the blades of each layer are uniformly arranged at equal intervals along the circumferential path around the axis direction of the impeller (14).

9. The dusting device with air nozzle according to claim 1, characterized in that The transition piece (2) comprises an outer shell, an inner shell (24) and a plurality of partition parts (23), the inner shell (24) being arranged in the outer shell, the partition parts (23) being connected between the outer shell and the inner shell (24), and the third channel (241) being formed between adjacent partition parts (23).

10. The dusting device with air nozzle according to claim 1, characterized in that The driving member (3) has two output shafts, a front shaft end (31) near the end of the dust cover (4), and a rear shaft end (32) away from the transition member (2).

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