Dust collection device with air tap

Abstract

The utility model discloses a dust collection device with an air tap, which belongs to the technical field of dust collection equipment, and adopts the main technical scheme that the dust collection device comprises a turbine; the transition piece is mounted on the turbine, and the transition piece is provided with a third duct communicated with the turbine; the driving piece is installed in the transition piece, the driving piece is provided with a front shaft end and a rear shaft end, a cutting piece is installed at the front shaft end, and the rear shaft end is connected with the turbine; the dust suction hood is installed on the transition piece and comprises a base, a main hood body, an air blowing nozzle assembly and an opening adjusting piece, the main hood body is located below the base, a plurality of suction openings are formed in the bottom of the main hood body, the opening adjusting piece is connected to the bottom of the main hood body in a sleeving mode, and the opening adjusting piece can rotate relative to the main hood body; the air blowing nozzle assembly is installed in the main cover body and comprises a plurality of air pipes and a plurality of air nozzles. The dust collection device solves the problems that an existing dust collection device is insufficient in suction force, and the air volume cannot be adjusted according to requirements, so that the dust collection efficiency is maximized.

Description

Technical Field

[0001] The utility model relates to the technical field of dust collection equipment, and in particular mainly to a dust collection device with an air nozzle. Background Art

[0002] In fields such as wood processing, it is usually necessary to clean up the dust and debris after cutting. Cleaning wood chips during wood processing usually requires the use of special dust suction devices to efficiently collect and remove the wood chips generated during the processing to keep the working environment clean and safe.

[0003] Although traditional dust collection devices can absorb wood chips and dust to a certain extent, in actual applications, they are unable to effectively clean large amounts of debris or debris at a long distance due to insufficient suction. This problem of insufficient suction is particularly evident in wood processing environments. The debris generated by wood processing varies in size and density, and different cleaning tasks may require different wind forces and dust collection strategies. Furthermore, the air inlet of existing dust collection devices cannot be adjusted according to actual needs, which limits the cleaning efficiency and scope of application. This not only affects the efficiency of the cleaning work, but may also increase the maintenance cost of the equipment. For example, patent CN220212819U discloses an axial-flow centrifugal composite dust collection device that has the above-mentioned problems.

[0004] In view of this, it is necessary to improve the existing dust collecting device. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a dust suction device with an air nozzle to solve the problems of insufficient suction power and inability to adjust the air volume according to demand in the prior art dust suction device, so as to maximize the dust suction efficiency. The implementation method of this technical solution is as follows:

[0006] A dust suction device with an air nozzle comprises: a turbine; a transition piece, wherein the transition piece is mounted on the turbine, and the transition piece has a third duct connected to the turbine; a driving piece, wherein the driving piece is mounted inside the transition piece, and the driving piece has a front axle end and a rear axle end, wherein a cutting piece is mounted on the front axle end, and the rear axle end is connected to the turbine; a dust suction hood, wherein the dust suction hood is mounted on the transition piece, and the dust suction hood comprises a base, a main hood body, an air blowing nozzle assembly and an opening adjustment piece, wherein the main hood body is located below the base, and a plurality of suction openings are arranged at the bottom of the main hood body, and the opening adjustment piece is sleeved on the bottom of the main hood body, and the opening adjustment piece can rotate relative to the main hood body, and the air blowing nozzle assembly is mounted inside the main hood body, and comprises a plurality of air pipes and a plurality of air nozzles.

[0007] Preferably, the opening adjusting member is provided with a plurality of blocks, and the plurality of blocks are evenly arranged at equal intervals around the axial direction of the opening adjusting member.

[0008] Preferably, the stopper corresponds to the position of the suction opening.

[0009] Preferably, the dust hood further comprises a telescopic adjustment ring, and the telescopic adjustment ring is rotatably connected to the base and the main hood body respectively.

[0010] Preferably, one end of the air pipe is installed 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 of the main cover body, and an air nozzle is provided at the other end of the air pipe.

[0011] Preferably, the dust hood further comprises a sealing ring, and the sealing ring is sleeved on the outside of the telescopic adjustment ring.

[0012] Preferably, the turbine includes an impeller, which is provided with three layers of blades, the first layer includes a plurality of first blades, the second layer includes a plurality of second blades, and the third layer includes a plurality of third blades, the first blades and the second blades are axial flow blades, and the third blades are composite blades.

[0013] Preferably, each layer of the impeller is provided with 3 to 23 blades, and the blades of each layer are evenly arranged at equal intervals along a circular path around the axis of the impeller.

[0014] Preferably, the transition piece comprises an outer shell, an inner shell and a plurality of partitions, the inner shell is arranged in the outer shell, the partitions are connected between the outer shell and the inner shell, and the third duct is formed between adjacent partitions.

[0015] Preferably, the driving member has two output shafts, the end close to the dust hood is the front shaft end, and the end away from the transition piece is the rear shaft end.

[0016] The beneficial effects of this application are:

[0017] First, multiple air pipes and air nozzles are set in the dust hood, evenly distributed around the cutting piece. When the device is working, the air nozzle blows out air through an external air pump, thereby raising the dust and debris generated when the cutting piece cuts the plate, so that the dust and debris flow out through the turbine in the dust collection device.

[0018] Secondly, the air intake at the bottom of the main cover body can be adjusted by the cooperation between the suction opening and the opening adjusting piece. The opening adjusting piece can rotate relative to the main cover body. The block of the opening adjusting piece corresponds to the suction opening, so that the block can not block, partially block or completely block the suction opening, thereby realizing the adjustment of the air intake volume and maximizing the dust collection efficiency.

[0019] Thirdly, dust or debris enters the turbine through the third duct, and is transformed into a rotating state around the axis by the front straightening vane, so that the dust or debris enters the impeller smoothly and improves efficiency. The speed of the dust or debris can be increased by the first blade and the second blade to generate a larger flow rate. The dust or debris is pressurized and pushed out by the third blade to have a high pressure and high flow rate. When passing through the diffuser section, the cross-sectional area is increased, which is conducive to the smooth diffusion of dust or debris and reduces the instability of 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 THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 This is an exploded view of the utility model from the first perspective;

[0022] Figure 2 This is an exploded view of the utility model from a second viewing angle;

[0023] Figure 3 An exploded diagram of the turbine of the utility model;

[0024] Figure 4 It is a cross-sectional view of the impeller of the utility model;

[0025] Figure 5 It is a schematic structural diagram of the dust hood of the utility model;

[0026] Figure 6 It is an exploded view of the dust hood of the utility model.

[0027] Description of reference numerals:

[0028] 1. Turbine;

[0029] 11. volute; 111. first duct; 112. front fairing; 113. rear fairing; 114. input section; 115. acceleration section; 116. pressurization section; 117. expansion section; 118. second duct; 119. output section;

[0030] 12. Middle cone;

[0031] 13. Rotating parts;

[0032] 14, impeller; 141, first blade; 142, second blade; 143, third blade; 144, rotating part; 1441, shaft hole; 1442, acceleration part; 1443, pressurizing part;

[0033] 15. Tail cone;

[0034] 2. Transition piece;

[0035] 21. front cone; 22. outer shell; 23. partition; 24. inner shell; 241. third duct;

[0036] 3. Driving member; 31. Front axle end; 32. Rear axle end; 33. Cutting member;

[0037] 4. Dust hood;

[0038] 41. base; 411. second protrusion; 412. first fixing hole;

[0039] 42. main cover; 421. suction opening; 422. first protrusion; 423. third protrusion; 424. third fixing hole; 425. air inlet;

[0040] 43. blowing nozzle assembly; 431. air pipe; 432. air nozzle; 4321. injection section;

[0041] 44, telescopic adjustment ring; 441, second groove; 442, third oblique groove; 443, first strip hole;

[0042] 45, sealing ring; 451 second fixing hole;

[0043] 46, opening adjustment member; 461, stopper; 462, first groove; 463, second strip hole. DETAILED DESCRIPTION

[0044] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and parts will be depicted in a simple schematic manner in the drawings.

[0045] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish between parts or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0047] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0048] See also Figure 1 and Figure 2 , is a dust collecting device with an air nozzle disclosed in the utility model, comprising a turbine 1, a transition piece 2, a driving piece 3 and a dust hood 4, wherein the transition piece 2 is mounted on the turbine 1, the driving piece 3 is mounted inside the transition piece 2, the driving piece 3 is mounted with a cutting piece 33, and the dust hood 4 is mounted on the transition piece 2. When the device is working, the driving piece 3 is powered on and started, driving the turbine 1 and the cutting piece 33 to work, and the dust or debris generated when cutting the plate is lifted up, enters the transition piece 2 through the dust hood 4, and is then sucked away by the suction force generated by the turbine 1. The airflow passes through the transition piece 2 and the turbine 1 for drainage, acceleration, pressurization and expansion, and finally flows out of the turbine 1 carrying dust and debris. The utility model can be used in the use scenario of plate cutting, but is not limited to plate cutting, and can be modified and applied on any equipment that generates dust or debris.

[0049] See also Figure 3 The turbine 1 includes a volute 11, an intermediate cone 12, a rotating member 13, an impeller 14 and a tail cone 15, wherein the intermediate cone 12 is installed in the volute 11, the rotating member 13 is installed on the intermediate cone 12, the impeller 14 is installed on the rotating member 13, the tail cone 15 is installed in the volute 11, and the tail cone 15 is connected to the impeller 14; the intermediate cone 12, the rotating member 13, the impeller 14 and the tail cone 15 are all coaxially arranged inside the volute 11.

[0050] Specifically, the volute 11 includes a first duct 111, a front fairing 112, a rear fairing 113, an input section 114, an acceleration section 115, a pressurization section 116, a diffuser section 117, a second duct 118 and an output section 119; the input section 114 is a flared bowl-shaped structure, and its side wall is an arc-shaped structure protruding outward, and circular openings are provided at both ends of the input section 114, and the openings at both ends of the input section 114 have different diameters, and the end with a smaller diameter is the small end, and the small end opening of the input section 114 is integrally connected to one end of the acceleration section 115, the acceleration section 115 is a cylindrical structure and both ends of the acceleration section 115 are also provided with openings, and the pressurization section 116 is The flared bowl-shaped structure has a side wall that is an arc-shaped structure protruding outward. Both ends of the pressurizing section 116 are provided with circular openings, and the opening diameters of the two ends of the pressurizing section 116 are different. The end with the smaller diameter is the small end, and the small end of the pressurizing section 116 is integrally connected to the other end of the acceleration section 115. The diffuser section 117 is a trumpet-shaped structure, and both ends of the diffuser section 117 are provided with openings, and the opening diameters of the two ends of the diffuser section 117 are different. The end with the larger diameter is the large end, and the large end of the diffuser section 117 is integrally connected to the large end of the pressurizing section 116. The output section 119 is a cylindrical structure, and both ends are provided with openings. The small end of the diffuser section 117 is integrally connected to one end of the output section 119.

[0051] Specifically, the volute 11 is provided with a plurality of front fairings 112, which are arc-shaped blades, arranged inside the input section 114 of the volute 11, and the front fairings 112 are fixedly connected to the input section 114, and the plurality of front fairings 112 are evenly arranged at equal intervals around the axis direction of the input section 114. The middle cone 12 is arranged inside the input section 114, and the middle cone 12 is a rotating body, and the outer wall of the middle cone 12 is arc-shaped and corresponds to the outer shell shape of the input section 114. In the installed state, a channel is formed between two adjacent front fairings 112 and the middle cone 12, namely the first duct 111, and the first duct 111 is used for drainage, so that dust or debris can enter the acceleration section 115 from the first duct 111.

[0052] See also Figure 4The impeller 14 is provided with multiple layers of blades, some of which are composite blades, and some of which are axial flow blades. In this embodiment, the impeller 14 is a rotating body, and the impeller 14 is provided with three layers of blades in sequence 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. At the same time, the impeller 14 also includes a rotating part 144, wherein the rotating part 144 is provided with an axial hole 1441 for connecting the rotating shaft, and the axial hole 1441 penetrates the rotating part 144 along the axial direction of the rotating part 144, and the rotating part 144 includes an accelerating part 1442 and a pressurizing part 1443 which are connected integrally. The acceleration part 1442 is arranged in the acceleration section 115, and the acceleration part 1442 is a rod-shaped structure. The first blade 141 and the second blade are fixedly connected to the side wall of the acceleration part 1442. The pressurizing part 1443 is arranged in the pressurizing section 116. The diameter of one end of the pressurizing part 1443 away from the acceleration part 1442 is larger than the diameter of the other end. The end of the pressurizing part 1443 connected to the acceleration part 1442 is equal to the diameter of the acceleration part 1442. The side wall of the pressurizing part 1443 is an arc structure. The third blade 143 is fixedly connected to the side wall of the pressurizing part 1443. The radial length of the third blade 143 is larger than the radial length of the first blade 141 or the second blade 142.

[0053] Specifically, each layer of the impeller 14 is provided with 3 to 23 blades, preferably 7, and the blades are evenly arranged at equal intervals along the circumferential direction of the outer wall of the rotating part 144; the first blade 141 and the second blade 142 are axial flow blades, which make the dust or debris direction along the axial direction, and are used to increase the flow rate of the dust or debris. The third blade 143 is a composite blade, that is, a mixed flow blade. Specifically, the composite blade includes an axial flow section and a centrifugal section; the third blade 143 is used to increase the flow rate and pressure of the dust or debris, reduce the disturbance of the dust or debris, and flow to the diffuser section.

[0054] See also Figure 3 The volute 11 is provided with a plurality of rear fairing blades 113 , which are arc-shaped blades. The rear fairing blades 113 are arranged inside the diffuser section 117 , and the rear fairing blades 113 are fixedly connected to the diffuser section 117 . The plurality of rear fairing blades 113 are evenly arranged at equal intervals around the axial direction of the diffuser section 117 .

[0055] Specifically, the tail cone 15 is arranged inside the diffuser section 117. The tail cone 15 is a cone 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 pressurizing part 1443. In the installed state, a channel is formed between two adjacent rear fairings 113 and the tail cone 15, which is the second duct 118. Dust or debris enters the output section 119 from the second duct 118. As the cross-sectional area of ​​the second duct 118 gradually increases, diffusion of dust or debris is achieved.

[0056] See also Figure 1 and Figure 2 The transition piece 2 includes an outer shell, an inner shell 24, a partition 23 and a front cone 21, wherein the outer shell is a cylindrical structure with openings at both ends, the cross section of the outer shell is circular, the inner shell 24 is installed inside the outer shell, the inner shell 24 is 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; a plurality of partitions 23 are provided, and the partitions 23 are long strip plates, and the partitions 23 are arranged in the gap between the inner shell 24 and the outer shell, and are arranged along the length direction of the inner shell 24 and the outer shell, and the partitions 23 are fixedly connected to the inner shell 24 and the outer shell, so that the inner shell 24 can remain relatively fixed with the outer shell in position, and a third duct 241 is formed between adjacent partitions 23, and the third duct 241 is connected to the turbine 1, and the front cone 21 is arranged inside the dust hood 4, and the front cone 21 is a cone structure, and the large end of the front cone 21 is connected to an end of the outer shell away from the turbine 1, so as to allow dust or debris to flow from the front cone 21 to the third duct 241.

[0057] See also Figure 1 and Figure 2 The driving member 3 adopts a dual-axis motor, and the driving member 3 is fixedly installed in the inner shell 24 of the transition member 2. The axis of the driving member 3 is arranged along the axial direction of the inner shell 24. The driving member 3 has two output shafts, the end close to the dust cover 4 is the front axis end 31, and the end away from the transition member 2 is the rear axis end 32. The front axis end 31 of the driving member 3 is installed with a cutting member 33, and the rear axis end 32 of the driving member 3 is connected to the turbine 1. In this embodiment, the cutting member 33 is a milling cutter. When the driving member 3 is working, it can drive the milling cutter to rotate to realize the function of cutting the wooden board.

[0058] See also Figure 1 , Figure 5 and Figure 6 The dust hood 4 is installed at the opening of the shell near the front axle end 31. The dust hood 4 includes: the dust hood 4 includes a base 41, a main cover body 42, a blowing nozzle assembly 43, a telescopic adjustment ring 44 and an opening adjustment member 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 adjustment member 46 is sleeved on the bottom of the main cover body 42. The opening adjustment member 46 can rotate relative to the main cover body 42. The blowing nozzle assembly 43 is installed inside the main cover body 42, and includes a plurality of air pipes 431 and a plurality of air nozzles 432. The telescopic adjustment ring 44 is rotatably connected to the base 41 and the main cover body 42, respectively.

[0059] See also Figure 5 and Figure 6The opening adjustment member 46 is provided with a plurality of blocks 461, and the plurality of blocks 461 are evenly arranged at equal intervals around the axial direction of the opening adjustment member 46, and the positions of the blocks 461 and the suction opening 421 correspond. Since the opening adjustment member 46 can rotate relative to the main cover body 42, the position of the block 461 relative to the suction opening 421 will change, and the block 461 can not block, partially block or completely block the suction opening 421, so as to adjust the opening of the suction opening 421 to adjust the air intake volume and ultimately maximize the dust collection efficiency.

[0060] See also Figure 6 , a first protrusion 422 is provided on the bottom of the main cover body 42, and a first groove 462 is provided on the inner wall of the opening adjustment member 46. For the convenience of installation and adjustment, the first groove 462 is preferably designed as an "L"-shaped groove. When adjusting the opening of the suction opening 421, by rotating the opening adjustment member 46, the first protrusion 422 slides in the first groove 462, so that the area of ​​the suction opening 421 blocked by the block 461 changes, so as to adjust the air intake volume; when adjusted to the target position, the rotation stops, and the opening adjustment member 46 and the main cover body 42 can be fixed by bolts to prevent them from rotating relative to each other.

[0061] Specifically, the dust hood 4 also includes a sealing ring 45, which is sleeved on the outside of the telescopic adjustment ring 44. The function of the sealing ring 45 is to prevent dust or debris from entering the telescopic adjustment ring 44, so as to avoid affecting the operation of the telescopic adjustment ring 44, thereby making it impossible for the dust hood 4 to adjust its length.

[0062] Furthermore, if Figure 5 As shown, one end of the air pipe 431 is installed on the inner wall of the main cover body 42, and the air pipe 431 extends from the inner wall of the main cover body 42 to the middle of the main cover body 42, and an air nozzle 432 is provided at the other end of the air pipe 431. That is, the air nozzle 432 is located in the middle of the internal space of the main cover body 42 to be closer to the cutting piece 33, and an air inlet hole 425 is provided on the shell of the main cover body 42, and the air pipe 431 is connected to the air inlet hole 425. The blowing nozzle assembly 43 of the technical solution is connected to the air pump through the air inlet hole 425. The air pump is an external device for providing an air source. The pressure of the air source is selected according to demand, and the air pump is directly obtained from the prior art. Therefore, its structure is not specifically described in this application.

[0063] Furthermore, if Figure 5As shown, the air nozzle 432 includes a jet section 4321 located at the end. To ensure a good blowing effect, the angle between the jet section 4321 and the vertical direction is preferably 10° to 20°. Since there are multiple air pipes 431 and air nozzles 432, preferably 4, which are evenly distributed around the cutting piece 33 to achieve the best blowing effect, the purpose of blowing is to lift the dust or debris generated when the cutting piece 33 cuts the plate. The specific implementation process is that the airflow blown out from the air nozzle 432 encounters the panel downward, and the airflow rebounds, and the airflow direction changes to upward, thereby lifting the dust or debris, so that it can be sucked upward by the suction force generated by the turbine 1 in the dust collection device, so as to achieve a more efficient dust collection effect.

[0064] See also Figure 6 A second protrusion 411 and a third protrusion 423 are respectively provided on the outer walls of the base 41 and the main cover body 42, and a second groove 441 and a third oblique groove 442 are provided on the inner wall of the telescopic adjustment ring 44, and the second protrusion 411 and the third protrusion 423 are respectively embedded in the second groove 441 and the third oblique groove 442.

[0065] Specifically, the second groove 441 is also set 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 oblique groove 442 to realize the adjustable position of the base 41 and the telescopic adjustment ring 44, and the adjustable position of the main cover body 42 and the telescopic adjustment ring 44. Since the third oblique groove 442 has an oblique groove in the vertical direction, when the main cover body 42 is rotated, the third protrusion 423 and the third oblique groove 442 will undergo relative movement in the vertical direction. When the position of the base 41 remains unchanged, the main cover body 42 will be moved away from or close to the base 41 to adjust the relative position of the base 41 and the main cover body 42. In this way, the length of the dust hood 4 is changed, and thus the distance between the bottom end of the dust hood 4 and the panel is changed.

[0066] In addition, in order to increase the stability of adjustment, the second protrusion 411, the third protrusion 423, the second groove 441, and the third oblique groove 442 are each provided in plurality.

[0067] Further, see Figure 6 A first fixing hole 412 is provided on the base 41, and a first strip hole 443 is provided on the telescopic adjustment ring 44; it also includes a first fixing member (not shown), which passes through the first strip hole 443 and the first fixing hole 412 in sequence to lock the base 41 and the telescopic adjustment ring 44.

[0068] In the embodiment where the sealing ring 45 is installed, a second fixing hole 451 is provided on the sealing ring 45, so that the first fixing member passes through the second fixing hole 451, the first strip hole 443 and the first fixing hole 412 in sequence to lock the sealing ring 45, the base 41 and the telescopic adjustment ring 44.

[0069] Specifically, when there is no need to adjust the height, the first fixing piece passes through the second fixing hole 451, the first strip hole 443 and the first fixing hole 412 in sequence, and then locks the base 41, the telescopic adjustment ring 44 and the sealing ring 45 to prevent the relative position of the base 41 and the main cover body 42 from changing, so as to ensure the stability of the work; preferably, the first fixing piece 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.

[0070] When the height needs to be adjusted, the first fixing part 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, thereby realizing the change of the distance between the dust hood 4 and the panel to reach the required value, so as to increase the applicability of the dust hood 4 in the present technical solution and meet the needs of different cutting.

[0071] Specifically, the distance between the bottom end of the dust hood 4 and the panel is preferably 0.5 mm to 3 mm.

[0072] Similarly, in order to achieve locking of the main cover body 42 and the opening adjustment member 46, a third fixing hole 424 is provided on the bottom of the main cover body 42, a second strip hole 463 is provided on the opening adjustment member 46, and a second fixing member (not shown) is also included. The second fixing member can be a bolt, and the third fixing hole 424 is provided with an internal thread. After the second fixing member passes through the second strip hole 463 and the third fixing hole 424 in turn, the opening adjustment member 46 and the main cover body 42 are locked. When it is necessary to adjust the opening of the suction opening 421, the second fixing member is removed.

[0073] The implementation principle of the utility model is: when in use, the wood to be cut is placed on the panel, and the cutting piece 33 performs cutting action after contacting the wooden board, and the driving piece 3 is powered on to start the driving piece 3, which drives the cutting piece 33 to work to cut the wooden board, and debris and dust are generated in the dust hood 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 a high speed. The impeller 14 can generate an airflow with a large air volume and high air pressure, so that the dust and debris on the panel can enter the third duct 241 through the dust hood 4 along with the airflow, and then flow through the turbine 1 to flow out for collection and treatment.

[0074] 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 hood 4, and dust or debris will partially suspend and stay, and the dust collection efficiency will be low, so it is necessary to increase the air intake; at this time, remove the second fixing member on the opening adjustment member 46, rotate the opening adjustment member 46 forward, so that the opening of the suction opening 421 becomes larger to achieve air replenishment; when it is adjusted to the target position, stop rotating, and fix the opening adjustment member 46 and the main cover body 42 by the second fixing member to prevent them from rotating relative to each other. When the suction force generated by the turbine 1 is small, but the air intake is too large, dust or debris may overflow under the blowing force of the air nozzle 432, and the dust collection efficiency is also low, so it is necessary to reduce the air intake. At this time, rotate the opening adjustment member 46 in the opposite direction to reduce the opening of the suction opening 421; in this way, the air intake is adjusted to maximize the dust collection efficiency.

[0075] The beneficial effects of the utility model are:

[0076] First, a plurality of air pipes 431 and air nozzles 432 are arranged in the dust hood 4, which are evenly distributed around the cutting piece 33. When the device is working, the air nozzles 432 blow out air flow through an external air pump, thereby raising dust and debris generated when the cutting piece 33 cuts the plate, so that the dust and debris flow out through the turbine in the dust collection device.

[0077] Secondly, the air intake at the bottom of the main cover body 42 can be adjusted by the cooperation between the suction opening 421 and the opening adjusting member 46. The opening adjusting member 46 can rotate relative to the main cover body 42. The block 461 of the opening adjusting member 46 corresponds to the suction opening 421, so that the block 461 can not block, partially block or completely block the suction opening 421, thereby realizing the adjustment of the air intake volume and maximizing the dust collection efficiency.

[0078] Third, dust or debris enters the turbine 1 through the third duct 241, and is transformed into a rotating state around the axis by the front fairing 112, so that the dust or debris can smoothly enter the impeller 14 to improve efficiency. The speed of the dust or debris can be increased by the first blade 141 and the second blade 142 to generate a larger flow rate. The dust or debris is pressurized and pushed out by the third blade 143 to have a high pressure and high flow rate. When passing through the diffuser section 117, the cross-sectional area is increased, which is conducive to the smooth diffusion of dust or debris and reduces the instability of dust or debris caused by excessive speed, thereby reducing the noise of the dust collection device and finally flowing out of the turbine 1.

[0079] In order to verify the dust collection device protected by this application, flow and pressure tests were carried out on the dust collection device, wherein the driving motor power was selected to be 3Kw, the impeller diameter was 0.125m, the volute diameter was 0.13m, and the total length was 0.45m. When the driving motor speed was 24000rpm, the static pressure at the air inlet end was measured to be -6300Pa, and the air flow rate at the output end was 1700 cubic meters / hour, which is equivalent to the performance effect achieved by a 9-19A centrifugal fan with a power of 5.5Kw, a volute diameter of 0.8m, a total length of 0.6m, and a speed of 2900rpm.

[0080] The above is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A dust collecting device with an air nozzle, characterized in that: include: Turbine (1); A transition piece (2), the transition piece (2) being mounted on the turbine (1), the transition piece (2) having a third duct (241) connected to the turbine (1); A driving member (3), the driving member (3) being mounted inside the transition member (2), the driving member (3) having a front shaft end (31) and a rear shaft end (32), the front shaft end (31) being mounted with a cutting member (33), and the rear shaft end (32) being connected to the turbine (1); a dust hood (4), wherein the dust hood (4) is mounted on the transition piece (2), The dust hood (4) comprises a base (41), a main hood body (42), an air blowing nozzle assembly (43) and an opening adjusting member (46); the main hood body (42) is located below the base (41); a plurality of suction openings (421) are arranged at the bottom of the main hood body (42); the opening adjusting member (46) is sleeved on the bottom of the main hood body (42); the opening adjusting member (46) can rotate relative to the main hood body (42); the air blowing nozzle assembly (43) is installed inside the main hood body (42) and comprises a plurality of air pipes (431) and a plurality of air nozzles (432).

2. The dust collecting device with an air nozzle according to claim 1, characterized in that: The opening adjusting member (46) is provided with a plurality of stoppers (461), and the plurality of stoppers (461) are evenly arranged at equal intervals around the axis direction of the opening adjusting member (46).

3. The dust collecting device with an air nozzle according to claim 2, characterized in that: The stopper (461) corresponds to the position of the suction opening (421).

4. The dust collecting device with an air nozzle according to claim 1, characterized in that: The dust hood (4) further comprises a telescopic adjustment ring (44), wherein the telescopic adjustment ring (44) is rotatably connected to the base (41) and the main hood body (42) respectively.

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

6. The dust collecting device with an air nozzle according to claim 4, characterized in that: The dust cover (4) further comprises a sealing ring (45), wherein the sealing ring (45) is sleeved on the outside of the telescopic adjustment ring (44).

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

8. The dust collecting device with an air nozzle according to claim 7, characterized in that: Each layer of the impeller (14) is provided with 3 to 23 blades, and the blades of each layer are evenly arranged at equal intervals along a circular path around the axis direction of the impeller (14).

9. The dust collecting device with an 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 partitions (23), wherein the inner shell (24) is arranged inside the outer shell, the partitions (23) are connected between the outer shell and the inner shell (24), and the third duct (241) is formed between adjacent partitions (23).

10. The dust collecting device with an air nozzle according to claim 1, characterized in that: The driving member (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 member (2) is the rear shaft end (32).

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