Dust removal device and black spot detector

Abstract

According to the dust removal device, a feeding opening is formed in a first box body, an electronic dust collection mechanism is arranged in the first box body, an air outlet is formed in a second box body, an air suction mechanism is arranged in the second box body, and the second box body is located above the first box body and communicates with the first box body; wherein the electronic dust collection mechanism comprises a metal part detachably installed in the first box body, an electrostatic generator arranged on the inner wall of the first box body and an electronic emitter arranged at the feeding port, the electrostatic generator is electrically connected with the metal part, and the electrostatic generator, the electronic emitter and the air suction mechanism are electrically connected with the control mechanism. Dust in front of the detection section of the black spot detector is effectively removed, so that the working precision of the black spot detector is improved, the reliability of product quality is improved, meanwhile, a worker can conveniently replace a metal part, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical equipment, in particular to a dust removal device and a black point detector. BACKGROUND

[0002] At present, the black point detector of the extruder die position is widely used in the market, but in the complex test environment, it cannot effectively remove the surface dust. The existence of these dust not only affects the performance of the detector, but also leads to a large error when tracing the quality. The accumulation of dust may block or interfere with the detection of the sensor, thereby affecting the accuracy of the data and bringing many challenges to the subsequent production and quality control. Therefore, a new type of dust removal device is urgently needed to improve the working efficiency and detection accuracy of the narrowband black point detector, so as to ensure the reliability of product quality. CONTENT OF THE INVENTION

[0003] The purpose of the present application is to overcome the problem of surface dust affecting the detection accuracy of the existing technology black band detector during detection, and to provide a dust removal device and a black point detector.

[0004] The technical scheme of the present application provides a dust removal device, which comprises a control mechanism, a first box body with a feed inlet, a second box body with an air outlet, an electronic dust collection mechanism arranged in the first box body, and a suction mechanism arranged in the second box body, wherein the second box body is arranged on the first box body and communicates with the first box body.

[0005] The electronic dust collection mechanism comprises a metal part, an electrostatic generator and an electronic emitter.

[0006] The metal part is detachably mounted in the interior of the first box body, the electrostatic generator is arranged on the inner wall of the first box body, the electronic emitter is arranged at the feed inlet, and the electrostatic generator is electrically connected with the metal part.

[0007] The electrostatic generator, the electronic emitter and the suction mechanism are respectively electrically connected with the control mechanism.

[0008] Further, the top wall of the first box body has a top wall passage for the metal part to pass through;

[0009] The electronic dust collection mechanism comprises a locking mechanism, the metal part passes through the top wall passage and is fixed in the top wall passage by the locking mechanism.

[0010] Further, the locking mechanism comprises a rotating handle, a rotating shaft, a rotating gear and two sliding racks.

[0011] The wall surfaces on the opposite sides of the top wall passage are respectively provided with positioning grooves for clamping the sliding racks.

[0012] The metal piece is provided with a rotating wheel mounting space, a rotating shaft mounting hole extending upward above the rotating wheel mounting space, and two side channels extending toward the positioning groove on opposite sides of the rotating wheel mounting space;

[0013] The rotating gear is pivotally mounted in the rotating wheel mounting space, the rotating shaft passes through the rotating shaft mounting hole and is connected with the rotating gear, and the two sliding racks are respectively slidably assembled in the two side channels and are respectively engaged with the rotating gear;

[0014] When the locking mechanism is in the released state, the sliding racks are in the retracted state and are separated from the positioning groove;

[0015] When the locking mechanism is in the locked state, the sliding racks are in the extended state and are inserted into the positioning groove.

[0016] Further, the metal piece includes an upper cover and a metal body;

[0017] The rotating shaft mounting hole penetrates through the upper cover, the bottom end of the upper cover is provided with a first recess, the top end of the metal body is provided with a second recess, and the first recess and the second recess form the rotating wheel mounting space therebetween;

[0018] The side channels are formed between the upper cover and the metal body;

[0019] The upper cover is detachably mounted above the metal body.

[0020] Further, the air suction mechanism includes a variable frequency fan;

[0021] The variable frequency fan has an air outlet direction toward the air outlet, and the variable frequency fan is electrically connected with the control mechanism.

[0022] Further, an intermediate pipeline is further connected between the first cabinet and the second cabinet, and a filter screen is detachably arranged in the intermediate pipeline.

[0023] Further, a film cover is arranged on the pipe wall of the intermediate pipeline, and the filter screen is arranged on the film cover.

[0024] Further, the filter screen includes a filter screen body and a clamping surrounding edge;

[0025] The clamping surrounding edge is arranged on the outer periphery of the filter screen body, and the clamping surrounding edge is used for clamping the filter screen body in the intermediate pipeline.

[0026] Further, the area of the air outlet is greater than the area of the feeding port.

[0027] The technical scheme of the present application also provides a black point detector, which comprises the dust removal device as described above, and the dust removal device is connected with the black point detector.

[0028] After the above technical scheme is adopted, the following beneficial effects are achieved:

[0029] The dust removal device of the present application is characterized in that: a feeding port is arranged on the first box body, an electronic dust collection mechanism is arranged inside, an air suction mechanism is arranged on the second box body, the second box body is designed above the first box body and is in communication with the first box body, the electronic dust collection mechanism comprises a metal piece which is detachably installed in the first box body, an electrostatic generator which is arranged on the inner wall of the first box body, and an electron emitter which is arranged at the feeding port, the electrostatic generator is electrically connected with the metal piece, and the electrostatic generator, the electron emitter and the air suction mechanism are respectively electrically connected with a control mechanism, dust before a detection section of the black point detector is effectively removed, thereby improving the working precision of the black point detector and the reliability of product quality, and the metal piece is convenient for replacement by the staff, thereby improving the working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] The disclosure of the present application will become more apparent from the following description with reference to the drawings. It should be understood that these drawings are only for the purpose of illustration and are not intended to limit the scope of protection of the present application. In the drawings:

[0031] Figure 1 is a structural schematic view of the dust removal device in an embodiment of the present application;

[0032] Figure 2 is a structural schematic view of the metal piece in an embodiment of the present application;

[0033] Figure 3 is a structural schematic view of the locking mechanism in an embodiment of the present application;

[0034] Figure 4 is a front view sectional view of the locking mechanism and the first box body in an embodiment of the present application;

[0035] Figure 5 is a side view sectional view of the locking mechanism and the first box body in an embodiment of the present application;

[0036] Figure 6 is a sectional view of the metal piece and the first box body in an embodiment of the present application;

[0037] Figure 7 is a structural schematic view of the filter screen in an embodiment of the present application;

[0038] Figure 8 is a schematic view of the dust removal device and the black point detector in an embodiment of the present application.

[0039] Correspondence table of reference signs:

[0040] First box body 1: feed inlet 11, top wall passage 12, positioning groove 13;

[0041] Second box body 2: air outlet 21;

[0042] Electronic dust collection mechanism 3: metal piece 31, rotating wheel installation space 311, rotating shaft installation hole 312, side passage 313, upper cover 314, metal body 315, first recess 316, second recess 317, static electricity generator 32, electronic emitter 33, locking mechanism 34, rotating handle 341, rotating shaft 342, rotating gear 343, sliding rack 344;

[0043] Air suction mechanism 4: variable frequency fan 41;

[0044] Intermediate pipeline 5: filter screen 51, filter screen body 511, clamping surrounding edge 512, film cover 52. DETAILED DESCRIPTION

[0045] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings.

[0046] It is easily understood that, according to the technical solution of the present application, a person of ordinary skill in the art can replace various structural modes and implementation modes with each other without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present application, and should not be considered as the whole or as a limitation or restriction on the technical solution of the application.

[0047] In this specification, the orientation terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the structure shown in the drawings, which are relative concepts, so they can be changed accordingly according to their different positions, different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", "third" are only for descriptive purposes and should not be understood as indicating or implying relative importance.

[0048] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two components. For a person of ordinary skill in the art, the above belongs to the specific meaning in the present application can be understood according to the specific circumstances.

[0049] As Figure 1As shown, the dust removal device in the embodiment of the application comprises a control mechanism, a first box body 1 provided with a feeding port 11, a second box body 2 provided with an air outlet 21, an electronic dust collection mechanism 3 arranged in the first box body 1, and an air suction mechanism 4 arranged in the second box body 2.

[0050] The electronic dust collection mechanism 3 comprises a metal piece 31, an electrostatic generator 32, and an electron emitter 33.

[0051] The metal piece 31 is detachably mounted in the interior of the first box body 1, the electrostatic generator 32 is arranged on the inner wall of the first box body 1, the electron emitter 33 is arranged at the feeding port 11, and the electrostatic generator 32 is electrically connected with the metal piece 31.

[0052] The electrostatic generator 32, the electron emitter 33, and the air suction mechanism 4 are electrically connected with the control mechanism, respectively.

[0053] In the embodiment, the first box body 1 is arranged below the second box body 2 and is in communication with the second box body 2, wherein the first box body 1 is provided with the feeding port 11, the interior of the first box body 1 is provided with the electronic dust collection mechanism 3, the second box body 2 is provided with the air outlet 21, and the interior of the second box body 2 is provided with the air suction mechanism 4.

[0054] The electronic dust collection mechanism 3 comprises a metal piece 31, an electrostatic generator 32, and an electron emitter 33, the metal piece 31 is detachably mounted in the interior of the first box body 1, the electrostatic generator 32 is arranged on the inner wall of the first box body 1, the electron emitter 33 is arranged at the feeding port 11, and the electrostatic generator 32 is electrically connected with the metal piece 31.

[0055] Specifically, when the air suction mechanism 4 sucks the dust from the feeding port 11 into the first box body 1, the electron emitter 33 at the feeding port 11 emits electrons to the dust, when the dust particles in the air collide with the electrons, the dust particles are negatively charged, at the same time, the electrostatic generator 32 electrifies the metal piece 31 and generates a positive potential, thereby adsorbing the dust particles, realizing high-efficiency dust collection effect.

[0056] The metal piece 31 is detachably mounted in the first box body 1. When a large amount of dust particles are adsorbed on the metal piece 31 after working for a period of time, the metal piece 31 can be disassembled and cleaned by the technical personnel. After collecting the dust particles, the metal piece 31 is installed back to continue adsorption, avoiding the accumulation of dust affecting the dust removal effect, which helps to maintain the efficient operation of the dust removal device and improves the work efficiency of the technical personnel.

[0057] As shown in the drawings, Figure 1 In one embodiment, the top wall of the first box body 1 has a top wall passage 12 for the metal piece 31 to pass through.

[0058] The electronic dust collection mechanism 3 includes a locking mechanism 34. The metal piece 31 passes through the top wall passage 12 and is fixed in the top wall passage 12 by the locking mechanism 34.

[0059] In this embodiment, the top wall of the first box body 1 is provided with a top wall passage 12 for the metal piece 31 to pass through, and the electronic dust collection mechanism 3 further includes a locking mechanism 34. After the metal piece 31 passes through the top wall passage 12, it can be fixed in the top wall passage 12 by the locking mechanism 34, which can be quickly and firmly installed or disassembled, greatly improving the assembly / disassembly efficiency of the equipment, saving time, improving the work efficiency of the technical personnel, and ensuring the stability of the metal piece 31 during use. The locking mechanism 34 can prevent the metal piece 31 from loosening or shifting, ensure the normal operation of the dust removal device, avoid potential safety hazards, and protect the safety of the equipment and the technical personnel.

[0060] The locking mechanism 34 can be a buckle locking mechanism, a lock pin locking mechanism, etc.

[0061] As shown in the drawings, Figures 2-6 In a preferred embodiment, the locking mechanism 34 includes a rotating handle 341, a rotating shaft 342, a rotating gear 343, and two sliding racks 344.

[0062] The wall surfaces on opposite sides of the top wall passage 12 are respectively provided with positioning grooves 13 for clamping the sliding racks 344.

[0063] The metal piece 31 is provided with a rotating wheel mounting space 311, a rotating shaft 342 mounting hole 312 above the rotating wheel mounting space 311 and extending upward, and two side passages 313 connected to opposite sides of the rotating wheel mounting space 311 and extending toward the positioning grooves 13.

[0064] The rotating gear 343 is pivotally mounted in the rotating wheel mounting space 311. The rotating shaft 342 passes through the rotating shaft 342 mounting hole 312 and is connected with the rotating gear 343. The two sliding racks 344 are respectively slidably assembled in the two side passages 313 and are respectively engaged with the rotating gear 343.

[0065] When the locking mechanism 34 is in the released state, the sliding rack 344 is in the retracted state and separated from the positioning slot 13.

[0066] When the locking mechanism 34 is in the locked state, the sliding rack 344 is in the extended state and inserted into the positioning slot 13.

[0067] In the preferred embodiment, the locking mechanism 34 comprises a rotating handle 341, a rotating shaft 342, a rotating gear 343 and two sliding racks 344, and the opposite walls of the top wall passage 12 are respectively provided with a positioning slot 13 for clamping the sliding rack 344.

[0068] The metal piece 31 further comprises a rotating wheel installation space 311, a rotating shaft 342 installation hole 312 extending upward above the rotating wheel installation space 311, and two side passages 313 extending from the opposite sides of the rotating wheel installation space 311 and towards the positioning slot 13.

[0069] The rotating gear 343 is installed in the rotating wheel installation space 311 and can pivot inside the rotating wheel installation space 311, the rotating shaft 342 passes through the rotating shaft 342 installation hole 312 and is connected with the rotating gear 343, and the two sliding racks 344 are respectively slidably assembled in the two side passages 313 and are respectively engaged with the rotating gear 343.

[0070] Specifically, when the metal piece 31 needs to be assembled, the technician can hold the rotating handle 341 and install the metal piece 31 from the top wall passage 12 downward, and when the metal piece 31 touches the bottom, the rotating handle 341 can be twisted to rotate the rotating shaft 342, thereby rotating the rotating gear 343, and the sliding rack 344 engaged with the rotating gear 343 can slide in the side passage 313.

[0071] When the locking mechanism 34 is in the released state, that is, the sliding rack 344 is in the retracted state and separated from the positioning slot 13, the sliding rack 344 is located entirely inside the side passage 313.

[0072] When the locking mechanism 34 is in the locked state, that is, the sliding rack 344 is in the extended state and inserted into the positioning slot 13, the sliding rack 344 is partially located inside the side passage 313 and the remaining part is inserted into the positioning slot 13, thereby detachably installing the metal piece 31 inside the first box body 1.

[0073] The locking mechanism 34 uses a combination of a rotating handle 341, a rotating shaft 342, a rotating gear 343, and a sliding rack 344. When the sliding rack 344 is inserted into the positioning groove 13, it can achieve precise positioning of the metal part 31 in the top wall channel 12, ensuring the stability and safety of the metal part 31 during the operation of the device, while also enhancing the convenience of operation for technicians. The locking or unlocking process can be easily completed by simply rotating the handle 341, saving operation time and manpower.

[0074] In one embodiment, the bottom of the first housing 1 is also provided with a base for mounting the metal part 31.

[0075] When technicians install the metal part 31, they only need to install the metal part 31 from the top wall channel 12 downwards to the bottom, and the metal part 31 can be installed on the base. At this time, turning the rotating handle 341 can lock the metal part 31 inside the first box.

[0076] like Figures 4-6 As shown, in one embodiment, the metal part 31 includes a top cover 314 and a metal body 315.

[0077] The mounting hole 312 of the rotating shaft 342 passes through the upper cover 314. The bottom end of the upper cover 314 is provided with a first groove 316, and the top end of the metal body 315 is provided with a second groove 317. The first groove 316 and the second groove 317 form a rotating wheel mounting space 311.

[0078] A side channel 313 is formed between the top cover 314 and the metal body 315.

[0079] The top cover 314 is detachably mounted on top of the metal body 315.

[0080] In this embodiment, the metal part 31 also includes an upper cover 314 and a metal body 315. The upper cover 314 is detachably installed on top of the metal body 315, which can be achieved through a snap-fit ​​structure, etc. The mounting hole 312 of the rotating shaft 342 passes through the upper cover 314, and a first groove 316 is provided at the bottom end of the upper cover 314, and a second groove 317 is provided at the top end of the metal body 315. When the upper cover 314 is installed on top of the metal body 315, the first groove 316 and the second groove 317 form a rotating wheel mounting space 311, and a side channel 313 is formed between the upper cover 314 and the metal body 315.

[0081] Specifically, the metal piece 31 adopts a structure design that the upper cover 314 is separated from the metal body 315, and the upper cover 314 is detachably installed on the metal body 315, so that the user can clean, check or replace the metal piece 31, avoiding high cost of overall replacement, and the upper cover 314 can be made of an insulating material, reducing static accumulation, reducing the interference of internal static electricity on other components, avoiding external personnel from contacting the live components when the internal electrical components of the equipment fail, reducing the risk of electric shock, improving the safety of technicians, and preventing accidents.

[0082] As shown in the drawings, Figure 1 In another embodiment, the air suction mechanism 4 includes a variable frequency fan 41.

[0083] The air outlet direction of the variable frequency fan 41 is towards the air outlet 21, and the variable frequency fan 41 is electrically connected with the control mechanism.

[0084] In this embodiment, the variable frequency fan 41 can adjust the air speed according to actual needs, and the air suction mechanism 4 can adjust according to the amount of dust on the narrow band, avoiding energy waste and improving the energy efficiency ratio, thereby reducing the overall operating cost.

[0085] Specifically, the variable frequency fan 41 is electrically connected with the control mechanism, and the control mechanism is electrically connected with the black band detector. When the black point detected by the black point detector is too much, the speed of the variable frequency fan 41 is adjusted to improve the dust removal effect of the dust removal device. If the detected black points are reduced to within the preset threshold, the number of black points is maintained within the preset threshold, and the speed of the variable frequency fan 41 is gradually reduced, thereby avoiding the long-term operation of the variable frequency fan 41 under high load, which helps to prolong the service life of the variable frequency fan 41, and also ensures that the dust removal device can adapt to various use conditions.

[0086] As shown in the drawings, Figure 1 In one embodiment, the first box body 1 and the second box body 2 are further connected with an intermediate pipeline 5, and the intermediate pipeline 5 is detachably provided with a filter screen 51.

[0087] In this embodiment, the first box body 1 and the second box body 2 are further provided with the intermediate pipeline 5, the intermediate pipeline 5 communicates with the first box body 1 and the second box body 2, and the intermediate pipeline 5 is further detachably provided with the filter screen 51, preventing dust from being blown from the first box body 1 to the second box body 2 under the action of the air suction mechanism 4 and then leaving from the air outlet 21, effectively reducing the possibility of dust entering the fan or leaving the dust removal device, prolonging the overall life of the equipment, reducing the failure rate, and improving the purification efficiency of the dust removal device. The detachable design of the filter screen 51 also facilitates technicians to clean and replace the filter screen 51, avoiding the efficiency of the filter screen 51 from being reduced or damaged due to dust accumulation.

[0088] As shown in the drawings, Figure 1As shown, in another embodiment, the pipe wall of the intermediate pipe 5 is provided with a film cover 52, and the film cover 52 is provided with a filter screen 51.

[0089] In this embodiment, the film cover 52 is provided on the pipe wall of the intermediate pipe 5, and the filter screen 51 is provided on the film cover 52, which can facilitate the technician to disassemble and replace the filter screen 51.

[0090] Specifically, when the filter screen 51 needs to be replaced, the technician only needs to lift or disassemble the film cover 52 to replace the filter screen 51. The cooperation between the film cover 52 and the pipe wall of the intermediate pipe 5 can effectively prevent dust or pollutants from leaking out of the intermediate pipe 5, maintain the sealing of the dust removal device, and ensure that the dust removal effect is not affected by the outside world. This significantly shortens the maintenance time of the technician and reduces the downtime cost.

[0091] As shown in the drawings, Figure 7 In one preferred embodiment, the filter screen 51 includes a filter screen body 511 and a clamping surrounding edge 512.

[0092] The clamping surrounding edge 512 is arranged on the outer periphery of the filter screen body 511, and the clamping surrounding edge 512 is used to clamp the filter screen body 511 in the intermediate pipe 5.

[0093] In this preferred embodiment, the filter screen 51 further includes a filter screen body 511 and a clamping surrounding edge 512 arranged on the outer periphery of the filter screen body 511. When the technician installs the filter screen 51, he only needs to place the filter screen body 511 into the intermediate pipe 5 and then fix it between the clamping surrounding edge 512 and the inside of the intermediate pipe 5. In this way, the filter screen 51 can be quickly and stably installed in the intermediate pipe 5 without the need for additional tools, greatly improving the efficiency of replacement and installation.

[0094] Specifically, the clamping surrounding edge 512 is used to fix the filter screen body 511, and the technician can easily disassemble the filter screen 51 for cleaning or replacement. When the clamping surrounding edge 512 fixes the filter screen body 511 in the intermediate pipe 5, it can also protect the structure of the filter screen body 511 from being damaged by external forces and ensure that the filter screen body 511 does not deform under high airflow, thereby ensuring long-term and efficient work.

[0095] The design of the clamping surrounding edge 512 needs to be adjusted according to the size and structure of the intermediate pipe 5, which has strong adaptability and can make the filter screen 51 compatible with various pipe designs, thus having good compatibility.

[0096] The material of the filter screen body 511 can be selected as a HEPA filter screen and made of an insulating material to prevent the technician from being injured when taking out the filter screen 51 for cleaning.

[0097] As shown in the drawings, Figure 1As shown, in another preferred embodiment, the area of the air outlet 21 is larger than the area of the material inlet 11.

[0098] In the preferred embodiment, when the area of the air outlet 21 is larger than the area of the material inlet 11, it helps to create a good airflow distribution in the dust removal device, and the larger air outlet 21 can make the filtered air flow out smoothly, avoiding backflow or uneven airflow caused by excessively high air flow rate, thereby improving the dust removal efficiency.

[0099] Specifically, it also reduces the internal air pressure fluctuation, effectively reduces the burden of internal components of the equipment, prolongs the service life of the dust removal device, and reduces the maintenance cost.

[0100] In one embodiment, the rotating handle 341, the shell of the electrostatic generator 32, the shell of the electron emitter 33, the first box 1 and the second box 2 are made of insulating materials.

[0101] In this embodiment, each component is made of insulating material, which can effectively prevent external leakage current or short circuit of electrical components, protect technicians from electric current injury, and ensure the safety of the equipment.

[0102] As shown, the application also provides a black point detector, which comprises the dust removal device as described above, and the dust removal device is connected to the black point detector. Figure 8

[0103] By arranging the dust removal device on the narrow band between the black point detector and the extruder die, the black point detector can work in a relatively clean environment, reducing the interference of dust and impurities on the detection results, ensuring the accuracy of the detection results, and also helping to prolong the service life of the black point detector, reduce wear caused by dust, reduce maintenance cost and downtime, improve the reliability of product quality detection, and reduce false positives or false negatives caused by environmental dust.

[0104] According to the needs, the above technical solutions can be combined to achieve the best technical effect.

[0105] The above is only the principle and preferred embodiment of the application. It should be noted that for those skilled in the art, the technical solutions disclosed in different embodiments can be appropriately combined to obtain embodiments, which are also included in the technical scope of the application. On the basis of the principles of the application, several other variations can also be made, which should be considered as the protection scope of the application.​

Claims

1. A dust removal device characterized by comprising: The utility model relates to a dust catcher, including control mechanism, first box (1) with feed inlet (11), second box (2) with air outlet (21), electronic dust collecting mechanism (3) in first box (1) and suction mechanism (4) in second box (2), wherein, second box (2) is located on first box (1) and communicates with first box (1); The electronic dust collecting mechanism (3) comprises a metal piece (31), an electrostatic generator (32) and an electron emitter (33); The metal piece (31) is detachably installed in the interior of the first box (1), the electrostatic generator (32) is arranged on the inner wall of the first box (1), the electron emitter (33) is arranged at the feed inlet (11), and the electrostatic generator (32) is electrically connected with the metal piece (31); The electrostatic generator (32), the electron emitter (33) and the suction mechanism (4) are electrically connected with the control mechanism respectively.

2. A dust extraction device according to claim 1, wherein, The top wall of the first box (1) has a top wall passage (12) for the metal piece (31) to pass through; The electronic dust collecting mechanism (3) comprises a locking mechanism (34), the metal piece (31) passes through the top wall passage (12) and is fixed in the top wall passage (12) by the locking mechanism (34).

3. A dust extraction device according to claim 2, wherein, The locking mechanism (34) comprises a rotating handle (341), a rotating shaft (342), a rotating gear (343) and two sliding racks (344); The wall surfaces on opposite sides of the top wall passage (12) are respectively provided with positioning grooves (13) for clamping the sliding racks (344); The metal piece (31) is provided with a rotating wheel installation space (311), a rotating shaft installation hole (312) extending upward above the rotating wheel installation space (311) and two side passages (313) connected on opposite sides of the rotating wheel installation space (311) and extending towards the positioning grooves (13); The rotating gear (343) is pivotally installed in the rotating wheel installation space (311), the rotating shaft (342) passes through the rotating shaft installation hole (312) and is connected with the rotating gear (343), and the two sliding racks (344) are respectively slidably assembled in the two side passages (313) and are respectively engaged with the rotating gear (343); When the locking mechanism (34) is in the release state, the sliding racks (344) are in the retracted state and are separated from the positioning grooves (13); When the locking mechanism (34) is in the locking state, the sliding racks (344) are in the extended state and are inserted into the positioning grooves (13).

4. A dust extraction device according to claim 3, wherein The metal piece (31) comprises an upper cover (314) and a metal body (315). The rotating shaft mounting hole (312) penetrates the upper cover (314), the bottom end of the upper cover (314) is provided with a first groove (316), the top end of the metal body (315) is provided with a second groove (317), and the first groove (316) and the second groove (317) constitute the rotating wheel mounting space (311); The side passage (313) is formed between the upper cover (314) and the metal body (315); The upper cover (314) is detachably mounted above the metal body (315).

5. The dust extraction device of claim 1, wherein The air suction mechanism (4) comprises a variable frequency fan (41); The air outlet direction of the variable frequency fan (41) is towards the air outlet (21), and the variable frequency fan (41) is electrically connected with the control mechanism.

6. A dust extraction device according to claim 1, wherein The first box body (1) and the second box body (2) are further connected with an intermediate pipeline (5), and the intermediate pipeline (5) is detachably provided with a filter screen (51).

7. A dust extraction device according to claim 6, wherein The pipe wall of the intermediate pipeline (5) is provided with a film cover (52), and the film cover (52) is provided with the filter screen (51).

8. A dust extraction device according to claim 6, wherein The filter screen (51) comprises a filter screen body (511) and a clamping surrounding edge (512). The clamping surrounding edge (512) is arranged on the outer periphery of the filter screen body (511), and the clamping surrounding edge (512) is used for clamping the filter screen body (511) in the intermediate pipeline (5).

9. A dust extraction device according to claim 1, wherein The area of the air outlet (21) is greater than the area of the feeding port (11).

10. A black spot detector characterized by, The dust removal device comprises the dust removal device of any one of claims 1-9, and the dust removal device is connected with the black point detector. The dust removal device comprises the dust removal device of any one of claims 1-9, and the dust removal device is connected with the black point detector.

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