A multi-stage cyclone oil fume separation device suitable for public flues

Abstract

The present invention relates to the technical field of oil fume separation devices, and discloses a multi-stage cyclone oil fume separation device suitable for public flues, comprising a main body, an air collecting box fixedly mounted at the end of the main body, an air outlet groove provided on the outer wall of the air collecting box, a fixing plate fixedly mounted on the inner wall of the air collecting box, a fixing hole provided in the middle of the fixing plate, a main body fixedly sleeved on the inner wall of the fixing hole, and an arc groove provided on the inner wall of the main body. By setting the main body, air collecting box, fan blades, and horizontal sensor structure, when the fan blades in the separation device vibrate or even tilt, the automatic control motor drives the rotating rod to rotate and moves the slider, so that the center of gravity of the four fan blades is always in a balanced state, thereby avoiding vibration or even tilting caused by scratching of the fan blades, thereby improving the stability and practicality of the separation device.

Description

Technical Field

[0001] The invention relates to the technical field of oil fume separation devices, and in particular to a multi-stage cyclone oil fume separation device suitable for a public flue. Background Art

[0002] Oil fume is the smoke produced by the combination of oil and raw materials during the frying process of dishes. It contains harmful substances and oil. The oil fume in residential areas is usually discharged through public flues. In order to reduce pollution to the environment, a oil fume separation device is needed.

[0003] Although the existing oil fume separation device can separate the oil fume during use, in actual use, the fan blades will adhere to the grease due to rotation. After long-term use, a large amount of impurities and grease will accumulate on the surface, which will cause the center of gravity of the fan blades to shift and produce vibration or even blade tilt, causing the equipment to make abnormal noises and reduce the equipment's oil fume separation effect. For this reason, we propose a multi-stage cyclone oil fume separation device suitable for public flues. Summary of the invention

[0004] The present invention provides a multi-stage cyclone oil fume separation device suitable for a public flue, which has the advantages of easy maintenance, automatic cleaning and high stability, and solves the problems raised by the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a multi-stage cyclone oil fume separation device suitable for a public flue, comprising a main body, an air collecting box is fixedly assembled at the end of the main body, an air outlet groove is provided on the outer wall of the air collecting box, a fixing plate is fixedly assembled on the inner wall of the air collecting box, a fixing hole is provided in the middle of the fixing plate, a main body is fixedly sleeved on the inner wall of the fixing hole, an arc groove is provided on the inner wall of the main body, a gear ring is fixedly sleeved on the inner wall of the main body, a dual-frequency motor is fixedly assembled on the bottom of the main body, a fan blade is fixedly connected to the output shaft of the dual-frequency motor, a sliding groove is provided on the outer wall of the fan blade, a level sensor is fixedly assembled on the inner wall of the fan blade, a screw rod is provided in the middle of the fan blade, and the screw The outer edge of the rod is threadedly connected to an arc-shaped threaded plate, and the outer wall of the arc-shaped threaded plate is fixedly equipped with a rotating rod, and the outer wall of the rotating rod is also fixedly equipped with a frosted brake pad, the end of the screw rod is rotatably connected to a steel ball, and the outer wall of the screw rod is fixedly sleeved with a bevel gear, and the outer wall of the screw rod is slidably connected to a slider, and the end of the slider away from the steel ball is provided with a strip groove, and the inner wall of the strip groove is fixedly equipped with a motor, the middle part of the slider is provided with a movable hole, and the inner wall of the movable hole is provided with a square groove, and both sides of the slider are fixedly equipped with fixed rods, and the outer wall of the fixed rod is fixedly equipped with a scraper 1, and the bottom of the fan blade is slidably connected to a scraper 2, and the outer wall of the scraper 2 is fixedly equipped with a connecting rod.

[0006] As a preferred technical solution of the present invention: the output shaft of the dual-frequency motor is fixedly sleeved with a rotating circular plate, the outer wall of the fan blade is fixedly assembled with the outer wall of the rotating circular plate, and the fan blade is fixedly connected to the output shaft of the dual-frequency motor through the rotating circular plate, the number of the fan blades is four, and the four fan blades are evenly distributed along the outer wall of the rotating circular plate, and the spacing between the end of the fan blade and the gear ring is 1 cm.

[0007] As a preferred technical solution of the present invention: a mounting groove is opened in the middle of the fan blade, and the inner wall of the mounting groove is rotatably connected to the outer wall of the screw rod, the outer wall of the slider is slidably connected to the inner wall of the mounting groove, and the spacing between the inner wall of the movable hole and the thread on the slider is 0.5 cm.

[0008] As a preferred technical solution of the present invention: the end of the connecting rod is fixedly assembled with the outer wall of the fixing rod, and the scraper 2 is fixedly connected with the scraper 1 through the connecting rod and the fixing rod.

[0009] As a preferred technical solution of the present invention: the outer wall of the gear ring is provided with a tooth groove, and the inner wall of the tooth groove meshes with the outer wall of the bevel gear, and the screw rod is transmission-connected with the bevel gear and the gear ring through the tooth groove.

[0010] As a preferred technical solution of the present invention: the inner walls of the fan blades are also fixedly equipped with controllers, and the controllers are electrically connected to the horizontal sensor, the motor, the micro reducer and the dual-frequency motor respectively; the output shaft of the motor is fixedly sleeved with an electromagnetic brake, and the electromagnetic brake is electrically connected to the controller; when the rotating rod rotates the fixed rod counterclockwise, the thread on the arc-shaped threaded plate is connected to the outer edge thread of the screw rod, and the frosted brake pad is detached from the outer wall of the fixed rod and the inner wall of the fan blade; otherwise, the arc-shaped threaded plate is detached from the screw rod, and the outer wall of the frosted brake pad is tightly fitted with the outer wall of the fixed rod and the inner wall of the fan blade respectively.

[0011] As a preferred technical solution of the present invention: a through hole is opened on the inner wall of the square groove, and the inner wall of the through hole is rotatably connected to the outer wall of the rotating rod.

[0012] As a preferred technical solution of the present invention: the friction force between the frosted brake pad and the main body and the fan blade is greater than the centrifugal force generated by the slider when the fan blade rotates at 200 revolutions / min.

[0013] As a preferred technical solution of the present invention: the outer wall of the scraper one is slidably connected to the outer wall of the fan blade, and the scraper one, the scraper two, the connecting rod and the fixing rod are all made of galvanized iron metal.

[0014] The present invention has the following beneficial effects:

[0015] 1. The multi-stage cyclone oil fume separation device suitable for public flues, through the set body, air collecting box, fan blades, and horizontal sensor structure, can automatically control the motor to drive the rotating rod to rotate and move the slider when the fan blades in the separation device vibrate or even tilt, so that the center of gravity of the four fan blades is always in a balanced state, thereby avoiding vibration or even tilting caused by scratching the fan blades, thereby improving the stability and practicality of the separation device.

[0016] 2. The multi-stage cyclone oil fume separation device suitable for public flues, through the provided screw rod, steel ball, arc groove, and bevel gear structure, enables the slider to move when not fixed through the cooperation of the arc threaded plate and the screw rod, so that both scraper one and scraper two can clean the grease adhered to the fan blades, thereby achieving an automatic cleaning effect, making it convenient for users to maintain the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the gas collecting box of the present invention;

[0019] Figure 3 It is a schematic diagram of the explosion structure of the fixing plate, the main body and the variable frequency motor of the present invention;

[0020] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0021] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0022] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0023] Figure 7 This is a schematic diagram of the fan blade structure of the present invention;

[0024] Figure 8 It is a schematic diagram of the screw rod structure of the present invention;

[0025] Fig. 9 Schematic diagram of the motor structure of the present invention.

[0026] In the figure: 1. main body; 2. air collecting box; 3. air outlet groove; 4. fixing plate; 5. main body; 6. fixing hole; 7. dual-frequency motor; 8. arc groove; 9. gear ring; 10. fan blade; 11. slide groove; 12. scraper 1; 13. scraper 2; 14. connecting rod; 15. fixing rod; 16. screw rod; 17. arc threaded plate; 18. rotating rod; 19. frosted brake pad; 20. square groove; 21. slider; 22. movable hole; 23. motor; 24. bevel gear; 25. steel ball; 26. level sensor; 27. strip groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-9 A multi-stage cyclone oil fume separation device suitable for a public flue comprises a main body 1, a gas collecting box 2 is fixedly mounted at the end of the main body 1, an air outlet groove 3 is provided on the outer wall of the gas collecting box 2, a fixing plate 4 is fixedly mounted on the inner wall of the gas collecting box 2, a fixing hole 6 is provided in the middle of the fixing plate 4, a main body 5 is fixedly sleeved on the inner wall of the fixing hole 6, an arc groove 8 is provided on the inner wall of the main body 5, a gear ring 9 is fixedly sleeved on the inner wall of the main body 5, a dual-frequency motor 7 is fixedly mounted on the bottom of the main body 5, a fan blade 10 is fixedly connected to the output shaft of the dual-frequency motor 7, a sliding groove 11 is provided on the outer wall of the fan blade 10, a level sensor 26 is fixedly mounted on the inner wall of the fan blade 10, a screw rod 16 is provided in the middle of the fan blade 10, and an arc threaded plate 17 is threadedly connected to the outer edge of the screw rod 16, The outer wall of the arc-shaped threaded plate 17 is fixedly equipped with a rotating rod 18, and the outer wall of the rotating rod 18 is also fixedly equipped with a frosted brake pad 19. The end of the screw rod 16 is rotatably connected to a steel ball 25, and the outer wall of the screw rod 16 is fixedly sleeved with a bevel gear 24. The outer wall of the screw rod 16 is slidably connected to a slider 21, and the end of the slider 21 away from the steel ball 25 is provided with a strip groove 27, and the inner wall of the strip groove 27 is fixedly equipped with a motor 23. A movable hole 22 is provided in the middle of the slider 21, and a square groove 20 is provided on the inner wall of the movable hole 22. Both sides of the slider 21 are fixedly equipped with a fixed rod 15, and the outer wall of the fixed rod 15 is fixedly equipped with a scraper 12. The bottom of the fan blade 10 is slidably connected to a scraper 2 13, and the outer wall of the scraper 2 13 is fixedly equipped with a connecting rod 14.

[0029] In the above structure, the slider 21, gear ring 9, movable hole 22, and arc-shaped threaded plate 17 structures are set, so that during the operation of the separation device, when the four fan blades 10 cause vibration or even blade tilt due to the adhesion of oil and dirt, the horizontal sensor 26 will respond to the monitored situation to the controller, so that the controller can control the output shaft of the motor 23 to drive the rotating rod 18 to rotate, so that the arc-shaped threaded plate 17 and the screw rod 16 are threadedly connected, so that the slider 21 drives the scraper 12 and the scraper 2 13 to scrape the oil from the upper and lower surfaces of the fan blade 10 at the same time, ensuring the uniform quality of the four fan blades 10, avoiding the four fan blades 10 from vibrating or even tilting due to different quality, and thereby improving the separation effect of the separation device on oil smoke.

[0030] In a preferred embodiment: the output shaft of the dual-frequency motor 7 is fixedly sleeved with a rotating circular plate, the outer wall of the fan blade 10 is fixedly assembled with the outer wall of the rotating circular plate, and the fan blade 10 is fixedly connected to the output shaft of the dual-frequency motor 7 through the rotating circular plate. The number of the fan blades 10 is four, and the four fan blades 10 are evenly distributed along the outer wall of the rotating circular plate, and the distance between the end of the fan blade 10 and the gear ring 9 is 1 cm.

[0031] In the above structure, the output shaft of the dual-frequency motor 7 can simultaneously drive the four fan blades 10 to rotate by means of the rotating circular plate, so as to separate the oil smoke. At the same time, the distance between the fan blades 10 and the gear ring 9 can ensure that the fan blades 10 cannot be blocked by the gear ring 9 when rotating, so that the fan blades 10 can rotate normally, and the bevel gear 24 will not be disturbed by external forces and will be firmly engaged with the tooth groove, ensuring that the slider 21 can drive the scraper 1 12 and the scraper 2 13 to move, thereby achieving the effect of automatic cleaning.

[0032] In a preferred embodiment: a mounting groove is opened in the middle of the fan blade 10, and the inner wall of the mounting groove is rotatably connected to the outer wall of the screw rod 16, the outer wall of the slider 21 is slidably connected to the inner wall of the mounting groove, and the spacing between the inner wall of the movable hole 22 and the thread on the slider 21 is 0.5 cm.

[0033] In the above structure, the installation groove, the screw rod 16 and the slider 21 structure are set, so that the screw rod 16 can rotate and drive the slider 21 to move. Through the change of the position of the slider 21, the four fan blades 10 are automatically adjusted to the position of the slider 21 after being affected by the quality of the oil stains, so that the four fan blades 10 are in a balanced state, avoiding the situation that the four fan blades 10 still vibrate even when rotating at a low speed. At the same time, the movement of the slider 21 is used to clean the oil stains adhered to the fan blades 10, so that the fan blades 10 can be transformed into a high-speed rotation state, and the slider 21 will move to the end of the fan blade 10. At this time, the mass of the four fan blades 10 has been unified, and cannot be disturbed, and cannot vibrate or even tilt, thereby achieving the effect of cleaning and automatic adjustment of balance functions.

[0034] In a preferred embodiment, the end of the connecting rod 14 is fixedly assembled with the outer wall of the fixing rod 15 , and the scraper blade 2 13 is fixedly connected with the scraper blade 1 12 via the connecting rod 14 and the fixing rod 15 .

[0035] In the above structure, the connecting rod 14 and the fixed rod 15 are respectively driven by the scraper 2 13 and the scraper 1 12 to clean the fan blade 10 at the same time, thereby ensuring that the outer walls on both sides of the fan blade 10 can be cleaned, reducing the influence of the oil stains adhered to the fan blade 10 on the fan blade 10, and thereby improving the separation effect of the separation device on oil smoke.

[0036] In a preferred embodiment, the outer wall of the gear ring 9 is provided with a tooth groove, and the inner wall of the tooth groove meshes with the outer wall of the bevel gear 24 , and the screw rod 16 is transmission-connected with the bevel gear 24 and the gear ring 9 via the tooth groove.

[0037] In the above structure, the tooth groove and bevel gear 24 structure are set, and the rolling connection between the steel ball 25 and the arc groove 8 is utilized to limit the screw rod 16. At the same time, the fan blade 10 will drive the screw rod 16 to rotate when it rotates, thereby causing the screw rod 16 to rotate. Therefore, at this time, the slider 21 will move under the cooperation of the arc threaded plate 17 and the thread on the screw rod 16. There is no need to set up a power structure, and the movement of the slider 21 can be achieved by simply utilizing the rotation of the fan blade 10, so as to clean the fan blade 10, and there is no need for the user to disassemble it for cleaning, thereby improving the automation and practicality of the device.

[0038] In a preferred embodiment: the inner walls of the fan blades 10 are also fixedly equipped with controllers, and the controllers are electrically connected to the horizontal sensor 26, the motor 23, the micro reducer and the dual-frequency motor 7 respectively. The output shaft of the motor 23 is fixedly sleeved with an electromagnetic brake, and the electromagnetic brake is electrically connected to the controller. After the rotating rod 18 rotates the fixed rod 15° counterclockwise, the thread on the arc-shaped threaded plate 17 is connected to the outer edge thread of the screw rod 16, and the frosted brake pad 19 is detached from the outer wall of the fixed rod 15 and the inner wall of the fan blade 10. Conversely, the arc-shaped threaded plate 17 is detached from the screw rod 16, and the outer wall of the frosted brake pad 19 is tightly fitted with the outer wall of the fixed rod 15 and the inner wall of the fan blade 10 respectively.

[0039] In the above structure, through the controller structure set up, when the fan blades 10 are too much adhered to the oil and dirt, resulting in the four fan blades 10 of different masses and vibration or even blade deviation during rotation, the controller automatically controls the dual-frequency motor 7 to change the speed of the output shaft, so that the rotating circular plate rotates at a speed of 200 turns / min, and at the same time controls the motor 23 to operate so that the arc threaded plate 17 is threadedly connected with the screw rod 16, so that the slider 21 moves and drives the scraper 12 and the scraper 2 13 to move. The positions of the four sliders 21 change differently, so the positions of the center of gravity of the four fan blades 10 will also be different, so that the four fan blades 10 are always in a balanced state, thereby ensuring that the four fan blades 10 will not vibrate during rotation, and the position change of scraper 12 and scraper 2 13 will clean the fan blades 10, thereby scraping off the adhered oil and dirt, so that the fan blades 10 can resume the high-speed rotation state, and will not generate vibration or blade tilt, thereby improving the automation of the separation device and the stability of the fan blades 10 during operation.

[0040] In a preferred embodiment, a through hole is formed on the inner wall of the square groove 20 , and the inner wall of the through hole is rotatably connected to the outer wall of the rotating rod 18 .

[0041] In the above structure, by setting the through hole structure, the rotating rod 18 can rotate 30° under the drive of the output shaft of the motor 23, so as to achieve the effect of switching back and forth between the two states of moving or being fixed, thereby improving the precise matching of various accessories in the device.

[0042] In a preferred embodiment, the friction force between the frosted brake pad 19 and the main body 5 and the fan blade 10 is greater than the centrifugal force generated by the slider 21 when the fan blade 10 rotates at 200 revolutions / min.

[0043] In the above structure, the slider 21 can be fixed when it needs to be fixed by the two different speed states of the fan blade 10. That is to say, after the rotating circular plate rotates clockwise for 200 circles, the slider 21 will move to the inner wall of one side of the slide groove 11 close to the rotating circular plate. At this time, it needs to be fixed because centrifugal force will be generated when the dual-frequency motor 7 is frequency-converted and the output shaft rotates at a low speed. If the slider 21 is not fixed, it will be thrown out. However, due to the limitations of the machining accuracy of the accessories and the wear of the materials, the slider 21 may be loose when it is thrown out, causing the scraper 12 or the scraper 2 13 to detach from the fan. The outer wall of the blade 10, therefore, in order to ensure that the scraper 12 and the scraper 2 13 are always in a tight fit with the fan blade 10, it is necessary to prevent the slider 21 from shaking when moving. Therefore, the slider 21 can only be driven to move by the rotation of the screw rod 16, and the output shaft of the dual-frequency motor 7 is rotated counterclockwise 200 times to make the scraper 12 and the scraper 2 13 fit tightly with the fan blade 10 to perform the cleaning operation, thereby improving the cleaning effect of the scraper 12 and the scraper 2 13 on the oil stains on the fan blade 10, ensuring the contact area between the fan blade 10 and the oil smoke, and further improving the oil stain treatment effect of the fan blade 10.

[0044] In a preferred embodiment: the outer wall of the scraper 12 is slidably connected to the outer wall of the fan blade 10, and the scraper 12, the scraper 2 13, the connecting rod 14 and the fixing rod 15 are all made of galvanized iron metal.

[0045] In the above structure, the galvanized iron metal has the characteristics of hardness and low cost, which can ensure the tightness of the connection structure between the scraper 12, the scraper 2 13, the connecting rod 14, the fixing rod 15 and the accessories, and can also reduce the production cost of the device.

[0046] Working principle, first of all, after the separation device is installed, the oil smoke inside the main body 1 will enter the air collecting box 2, and at this time the dual-frequency motor 7 will drive the rotating circular plate to rotate, so that the fan blades 10 can adsorb and separate the oil smoke, and the fan blades 10 will have oil and dirt sticking and accumulating during the operation. When the center of gravity of the fan blades 10 is affected and causes it to vibrate or even tilt, the horizontal sensor 26 controls the dual-frequency motor 7 to change the frequency through the controller, so that the fan blades 10 rotate counterclockwise at a speed of 200 revolutions / min, and at the same time the motor 23 drives the rotating rod 18 to rotate, so that the arc-shaped threaded plate 17 is affected by the rotation of the screw rod 16 and drives the slider 21 to move toward the rotating circular plate, and then the rotating rod 18 and the frosted brake pad 19 lock the position of the slider 21 with the cooperation of the output shaft of the motor 23. Because the masses of the four fan blades 10 are different, the positions of the four sliders 21 are different, ensuring that the center of gravity of the four fan blades 10 are in the same position, so that The four fan blades 10 all smoothly follow the rotation of the rotating disk, and then the output shaft of the dual-frequency motor 7 rotates clockwise to make the slider 21 move away from the rotating circular plate, and the movement of the slider 21 smoothly drives the scraper 12 and the scraper 2 13 to clean the fan blades 10 at the same time. After three reciprocating motions, the slider 21 will automatically reset to the inner wall of the slide groove 11 close to one end of the rotating circular plate, and then the controller controls the dual-frequency motor 7 to restore the high-speed rotation frequency. At this time, the output shaft of the motor 23 rotates to make the arc-shaped threaded plate 17 disengage from the screw rod 16, and the frosted brake pad 19 will also disengage from the main body 5 and the fan blade 10. The output shaft of the motor 23 is locked by the electromagnetic brake, so that the slider 21 cannot be affected by the thread or friction, and the slider 21 is thrown to the end of the fan blade 10 due to the centrifugal force, so as to achieve the effect of automatic cleaning and maintaining the balance of the four fan blades 10, and finally the air after grease separation can be discharged through the air outlet groove 3.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage cyclone oil fume separation device suitable for a public flue, comprising a body (1), characterized in that: An air collecting box (2) is fixedly mounted on the end of the body (1), an air outlet groove (3) is provided on the outer wall of the air collecting box (2), a fixing plate (4) is fixedly mounted on the inner wall of the air collecting box (2), a fixing hole (6) is provided in the middle of the fixing plate (4), a body (5) is fixedly sleeved on the inner wall of the fixing hole (6), an arc groove (8) is provided on the inner wall of the body (5), a gear ring (9) is fixedly sleeved on the inner wall of the body (5), a dual-frequency motor (7) is fixedly mounted on the bottom of the body (5), a fan blade (10) is fixedly connected to the output shaft of the dual-frequency motor (7), a sliding groove (11) is provided on the outer wall of the fan blade (10), a level sensor (26) is fixedly mounted on the inner wall of the fan blade (10), a screw rod (16) is provided in the middle of the fan blade (10), an arc threaded plate (17) is threadedly connected to the outer edge of the screw rod (16), and the outer wall of the arc threaded plate (17) is fixedly sleeved on the inner wall of the A rotating rod (18) is fixedly mounted, and a frosted brake pad (19) is also fixedly mounted on the outer wall of the rotating rod (18); a steel ball (25) is rotatably connected to the end of the screw rod (16); a bevel gear (24) is fixedly sleeved on the outer wall of the screw rod (16); a slider (21) is slidably connected to the outer wall of the screw rod (16); a strip groove (27) is provided at one end of the slider (21) away from the steel ball (25); a motor (23) is fixedly mounted on the inner wall of the strip groove (27); a movable hole (22) is provided in the middle of the slider (21); a square groove (20) is provided on the inner wall of the movable hole (22); fixed rods (15) are fixedly mounted on both sides of the slider (21); a scraper plate 1 (12) is fixedly mounted on the outer wall of the fixed rod (15); a scraper plate 2 (13) is slidably connected to the bottom of the fan blade (10); and a connecting rod (14) is fixedly mounted on the outer wall of the scraper plate 2 (13); The inner walls of the fan blades (10) are also fixedly equipped with controllers, and the controllers are electrically connected to the horizontal sensor (26), the motor (23), the micro reducer and the dual-frequency motor (7). The output shaft of the motor (23) is fixedly sleeved with an electromagnetic brake, and the electromagnetic brake is electrically connected to the controller. After the rotating rod (18) rotates the fixed rod (15) degrees counterclockwise, the threads on the arc-shaped threaded plate (17) are connected to the outer edge threads of the screw rod (16), and the frosted brake pad (19) is separated from the outer wall of the fixed rod (15) and the inner wall of the fan blade (10). On the contrary, the arc-shaped threaded plate (17) is separated from the screw rod (16), and the outer wall of the frosted brake pad (19) is tightly fitted with the outer wall of the fixed rod (15) and the inner wall of the fan blade (10).

2. The multi-stage cyclone oil fume separation device suitable for a public flue according to claim 1, characterized in that: The output shaft of the dual-frequency motor (7) is fixedly sleeved with a rotating circular plate, the outer wall of the fan blade (10) is fixedly assembled with the outer wall of the rotating circular plate, and the fan blade (10) is fixedly connected to the output shaft of the dual-frequency motor (7) through the rotating circular plate. The number of the fan blades (10) is four, and the four fan blades (10) are evenly distributed along the outer wall of the rotating circular plate. The distance between the end of the fan blade (10) and the gear ring (9) is 1 cm.

3. The multi-stage cyclone oil fume separation device suitable for a public flue according to claim 1, characterized in that: A mounting groove is provided in the middle of the fan blade (10), and the inner wall of the mounting groove is rotatably connected to the outer wall of the screw rod (16), the outer wall of the slider (21) is slidably connected to the inner wall of the mounting groove, and the spacing between the inner wall of the movable hole (22) and the thread on the slider (21) is 0.5 cm.

4. The multi-stage cyclone oil fume separation device suitable for a public flue according to claim 1, characterized in that: The end of the connecting rod (14) is fixedly assembled with the outer wall of the fixing rod (15), and the scraper blade 2 (13) is fixedly connected with the scraper blade 1 (12) via the connecting rod (14) and the fixing rod (15).

5. The multi-stage cyclone oil fume separation device suitable for a public flue according to claim 1, characterized in that: The outer wall of the gear ring (9) is provided with a tooth groove, and the inner wall of the tooth groove meshes with the outer wall of the bevel gear (24), and the screw rod (16) is transmission-connected to the bevel gear (24) and the gear ring (9) via the tooth groove.

6. The multi-stage cyclone oil fume separation device suitable for a public flue according to claim 1, characterized in that: A through hole is formed on the inner wall of the square groove (20), and the inner wall of the through hole is rotatably connected to the outer wall of the rotating rod (18).

7. The multi-stage cyclone oil fume separation device suitable for a public flue according to claim 1, characterized in that: The friction force between the frosted brake pad (19), the main body (5) and the fan blade (10) is greater than the centrifugal force generated by the slider (21) when the fan blade (10) rotates at 200 revolutions / min.

8. The multi-stage cyclone oil fume separation device suitable for a public flue according to claim 1, characterized in that: The outer wall of the scraper blade 1 (12) is slidably connected to the outer wall of the fan blade (10), and the scraper blade 1 (12), the scraper blade 2 (13), the connecting rod (14) and the fixing rod (15) are all made of galvanized iron metal.

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