Oil mist recovery device

Abstract

The present invention discloses an oil mist recovery device, wherein an air inlet pipe is arranged on the side of a shell, an air outlet is arranged on the top surface of the shell, and a front air cavity and a rear air cavity are connected in the shell, wherein the front air cavity is connected to the air inlet pipe, and the rear air cavity is connected to the air outlet; a fan is arranged in the rear air cavity, and a cover is arranged on the periphery of the fan, and a buffer cavity is formed between the cover and the fan, and the buffer cavity is connected to the rear air cavity. The present invention arranges a cover outside the fan, on the one hand, the cover provides protection for the fan, prevents the fan from being exposed directly below the air outlet, avoids oil, water or dust from entering the fan, protects the internal components of the fan, and prolongs the service life of the fan; on the other hand, a buffer cavity is formed on the periphery of the fan, and the airflow from the fan first enters the buffer cavity, and then flows into the rear air cavity from the air outlet channel after being evenly distributed in the buffer cavity, which is more conducive to improving the distribution uniformity of the airflow.

Description

Technical Field

[0001] The invention relates to the technical field of air oil mist purification and recovery, in particular to an oil mist recovery device. Background Art

[0002] During machining operations, various types of cutting oils or coolants are often used to lubricate the tools and reduce the machining temperature of the workpieces, which will generate a large amount of oil mist, dust, oil smoke and haze in the working environment, causing harm to the health of on-site operators. The oil mist collector is mainly used to collect the oil mist, water mist or dust generated in mechanical processing, and through interception and filtration, the harmful substances in them are removed, and the materials with recycling value such as metal cutting oil are recycled, and finally clean gas is discharged.

[0003] Existing oil mist collectors usually have horizontal air intake and horizontal air outlet, that is, the gas is sucked in from the front side by a suction fan and discharged from the rear side after filtering and purification. The gas guide uniformity is poor, the wind utilization efficiency is low, and the filtration efficiency is low.

[0004] An oil mist recovery machine is disclosed in Chinese utility model patent 201520323010.9, which includes an air inlet, a first air chamber, a second air chamber, and an air guide port located above the second air chamber, which are connected in sequence from front to back. A first filter unit is arranged in the first air chamber, a second filter unit is arranged above the air guide port, the air inlet is orthogonal to the air guide port, and a turbine guide fan of the exhaust unit is arranged in the second air chamber and directly below the second filter unit; the gas is introduced into the first air chamber from the front side through the rotation of the turbine guide fan, enters the second air chamber after being filtered by the first filter unit, and then is pumped to the inside of the second filter unit by the air guide port on the top surface, and is discharged from the top after being filtered by the second filter unit.

[0005] The above-mentioned oil mist recovery machine improves the uniformity of air conduction by means of horizontal air intake and vertical air discharge, but this structure still has the following shortcomings:

[0006] (1) The air inlet of the oil mist recovery machine is located at the top of the second air chamber and is directly connected to the second air chamber. After the gas is sucked from the first air chamber, it is directly pushed upward into the second filter unit. The flow path of the gas in the second air chamber is short, and the residence time is short. The air conduction in the second air chamber is still not uniform, and the wind utilization is still not sufficient;

[0007] (2) The turbine guide fan is directly exposed below the second filter unit. The oil, water or dust filtered by the second filter unit can easily enter the turbine guide fan, corrode or wear the internal components of the turbine guide fan, and shorten the service life of the turbine guide fan.

[0008] The oil storage tank of the existing oil mist collector is arranged at the bottom of the frame, which is inconvenient to replace or clean the oil storage bottle. Summary of the invention

[0009] In view of the shortcomings of the above-mentioned existing oil mist collectors, the applicant provides an oil mist recovery device with a reasonable structure to improve the utilization rate of wind and the filtering efficiency; a cover is used to protect the fan and extend the service life of the fan; and the chassis layout is convenient for replacing or cleaning the oil storage bottle.

[0010] The technical solution adopted by the present invention is as follows:

[0011] An oil mist recovery device, wherein an air inlet pipe is arranged on the side of a shell, an air outlet is arranged on the top surface of the shell, and a front air cavity and a rear air cavity are connected in the shell, the front air cavity is connected to the air inlet pipe, and the rear air cavity is connected to the air outlet;

[0012] A fan is arranged in the rear air cavity, a cover shell is sleeved on the outer periphery of the fan, a buffer cavity is formed between the cover shell and the fan, and the buffer cavity is connected with the rear air cavity.

[0013] As a further improvement of the above technical solution:

[0014] A first partition is arranged in the shell, and the first partition divides the inner cavity of the shell into a front air cavity and a rear air cavity. An air suction port is opened on the first partition facing the fan, and an air guide ring is inserted into the air suction port, and the air guide ring connects the front air cavity and the rear air cavity; the air guide ring has an air guide part and a connecting part, and the air guide part is an inwardly concave arc plate, and the connecting part is fixed to the first partition by fasteners.

[0015] The fan has a hollow rotor, and a plurality of blades are evenly arranged on the outer periphery of the rotor and along the circumferential direction. Front baffles and rear baffles are provided on both sides of the blades, and air outlets are formed between adjacent blades and the front baffles and the rear baffles; the front baffle is an inwardly concave arc plate, and the front baffle has an air inlet.

[0016] The air guiding portion of the air guiding ring extends into the air inlet of the front baffle of the fan, and the arc of the air guiding portion is arranged opposite to the arc of the front baffle to form a U-shaped guide surface.

[0017] A second partition is also arranged inside the shell and separated from the first partition. The second partition is an L-shaped plate, whose top edge is fixed on the top plate of the outer shell, and whose horizontal outer side is fixed on the rear side plate of the shell. The second partition separates a accommodating cavity on the rear upper side of the rear air cavity; the fan is connected to the motor, and the motor is arranged in the accommodating cavity; a heat dissipation plate is arranged on the rear side plate of the shell corresponding to the accommodating cavity.

[0018] The cover shell has a cylindrical outer cover plate, a front cover plate is provided on the front side of the outer cover plate, a rear connecting plate is provided on the rear side of the outer cover plate, the rear connecting plate is fixed to the second partition plate through a connecting plate assembly, and the connecting plate assembly is sealed on the rear side of the cover shell; an inner ring is provided on the inner side of the front cover plate, and the inner ring extends axially into the interior of the cover shell; the front cover plate and the inner ring are sleeved on the outer periphery of the air guide part of the front baffle plate and the air guide ring of the fan, and there is a spacing between the front cover plate and the inner ring and the front baffle plate and the air guide ring to form an air outlet channel; an opening is opened on the lower side of the outer cover plate.

[0019] The bottom plate of the shell is a stepped plate, having a high flat plate portion, a low flat plate portion, and a vertical plate portion connecting the high and low flat plates, forming a low-lying liquid collection area in the lower part of the inner cavity of the shell; the first partition extends to the low flat plate portion, dividing the liquid collection area into a front liquid collection area and a rear liquid collection area, the front liquid collection area and the rear liquid collection area are respectively located at the bottom of the front air cavity and the rear air cavity; the first oil outlet hole and the second oil outlet hole are respectively opened on the low flat plate portion corresponding to the front liquid collection area and the rear liquid collection area; the vertical plate portion is connected to the low flat plate portion through a circular arc plate portion, and an arc-shaped guide plate is provided between the low flat plate portion and the left side plate of the shell.

[0020] A first filter element is radially arranged in the air inlet pipe; a second filter element is vertically arranged in the front air cavity; a third filter element is arranged at the top of the rear air cavity, below the air outlet; the first filter element and the second filter element are metal filter elements, and the third filter element is filter cotton.

[0021] A micro pressure gauge is arranged on the side of the shell body near the third filter element, and the micro pressure gauge is connected to the rear air cavity.

[0022] The shell is arranged on the base frame, and a placement box is arranged in the frame body of the base frame, and a first oil storage bottle and a second oil storage bottle are arranged in the placement box. The first oil storage bottle is connected to the front liquid collection area through a pipeline, and the second oil storage bottle is connected to the rear liquid collection area through a pipeline; the left and right sides of the frame body are covered with a cover plate, and the cover plate has an observation window; the front and rear sides of the frame body are respectively provided with a front door and a rear door; and the bottom of the frame body is provided with rollers.

[0023] The beneficial effects of the present invention are as follows:

[0024] (1) A cover is set outside the fan. On the one hand, the cover provides protection for the fan, preventing the fan from being exposed directly below the air outlet, preventing oil, water or dust from entering the fan, protecting the internal components of the fan, and extending the service life of the fan; on the other hand, a buffer cavity is formed on the periphery of the fan. The airflow from the fan first enters the buffer cavity, and then flows into the rear air cavity from the air outlet channel after being evenly distributed in the buffer cavity. This is more conducive to improving the uniformity of airflow distribution and reducing the resistance of airflow flow, making the airflow flow smoother. In addition, the airflow will form a vortex in the buffer cavity. During the rotation of the airflow, the oil, water or dust in the airflow will also be thrown onto the inner wall of the cover under the action of centrifugal force to achieve filtration. That is, the buffer cavity can perform a third filtration on all the airflow inhaled by the fan, thereby improving the utilization efficiency of the wind and the filtration efficiency;

[0025] (2) The air guide part of the air guide ring extends into the air inlet of the front baffle of the fan, ensuring that the airflow introduced by the air guide ring flows completely into the fan, which is beneficial to improving the utilization efficiency of the wind; the arc of the air guide part is arranged opposite to the arc of the front baffle to form a U-shaped guide surface, which has a guiding effect on the airflow, reduces the airflow resistance, and makes the airflow flow smoother;

[0026] (3) A heat sink is provided on the rear side plate of the housing, which can dissipate the heat in the accommodating cavity to prevent the temperature in the accommodating cavity from being too high and burning the components installed therein;

[0027] (4) There is a distance between the front cover plate and the inner ring of the cover and the front baffle and the air guide ring to form an air outlet channel. The airflow in the buffer cavity flows into the rear air cavity through the air outlet channel. The inner ring can not only increase the strength of the front cover plate, but also better guide the airflow outward, reduce the airflow resistance, and make the airflow flow smoother. There is an opening on the lower side of the outer cover plate, which can discharge the oil, water or dust filtered out of the cover downward into the rear liquid collection area to avoid the accumulation of filtered residual liquid in the cover; the outer flange of the outer cover plate is inclined downward, which is more conducive to the downward flow of filtered residual liquid. The handle of the outer cover plate is used to extract the cover to facilitate the disassembly and assembly of the cover;

[0028] (5) The arc plates at the two edges of the low flat plate portion of the shell bottom plate have a diversion effect on the filtered residual liquid, which can guide the filtered residual liquid to the oil outlet hole to prevent the residual liquid from being deposited in the shell. The second filter element is arranged at the rear end of the high flat plate portion of the bottom plate, and the filtered residual liquid can flow directly downward along the vertical plate portion to prevent the residual liquid from being deposited on the high flat plate portion;

[0029] (6) The air inlet pipe has a first filter element, the front air cavity has a second filter element, and the air outlet of the rear air cavity has a final filter element. Through the filtering treatment of multiple filter elements, all oil mist can be isolated and recovered, and the filtering efficiency is high. The first and second filter elements are metal filter elements, which can be used for a long time after cleaning, saving replacement costs. The last filter element is filter cotton, which can completely isolate the oil mist and has a high filtering efficiency;

[0030] (7) The micro pressure gauge is used to detect the pressure at the top of the rear air cavity. The wind resistance in the rear air cavity is monitored through pressure detection so that the third filter element can be replaced in time;

[0031] (8) The cover of the base frame is provided with an observation window, through which the amount of oil recovered by the first oil storage bottle and the second oil storage bottle can be observed in real time. Doors are provided on both the front and rear sides of the base frame, which are convenient for the operator to operate from either side, and to change the oil storage bottle, clean the storage box or the inside of the frame. The rollers at the bottom of the frame facilitate the movement of the device and place the device at the designated location. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a stereogram of the present invention.

[0033] Figure 2 This is a cross-sectional view of the present invention, in which the arrows indicate the direction of the airflow.

[0034] Figure 3 A three-dimensional diagram of the fan.

[0035] Figure 4 This is a three-dimensional diagram of the air guide ring.

[0036] Figure 5 A three-dimensional diagram of the housing.

[0037] Figure 6 A cross-sectional view of the housing.

[0038] Figure 7 for Figure 6 Enlarged view of part A in the middle.

[0039] In the figure: 1. Shell; 11. Air inlet pipe; 12. Air outlet; 13. Bottom plate; 131. High flat plate; 132. Low flat plate; 1321. First oil outlet hole; 1322. Second oil outlet hole; 133. Vertical plate; 14. First baffle; 15. Second baffle; 16. Guide plate; 17. Heat sink; 2. Fan; 21. Drum; 22. Fan blade; 23. Front baffle; 24. Rear baffle; 25. Air inlet; 26. Air outlet; 3. Air guide ring; 31. Air guide part; 32. Connecting part; 4. Cover; 41. Outer cover plate; 411. Outer flange; 42. Front cover plate; 43. Rear connecting plate; 44. Inner ring; 45. Opening; 46. Handle; 5. First filter element; 6. Second filter element; 7. Third filter element; 8. Micro pressure gauge;

[0040] 9. chassis; 91. frame; 92. storage box; 93. first oil storage bottle; 94. second oil storage bottle; 95. cover plate; 96. front door; 97. rear door; 98. roller;

[0041] 10. front air cavity; 101. front liquid collecting area; 20. rear air cavity; 201. rear liquid collecting area; 30. accommodating cavity; 40. buffer cavity. DETAILED DESCRIPTION

[0042] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0043] like Figure 1 , Figure 2 As shown, the recovery device of the present invention is arranged on the top surface of the base frame 9.

[0044] like Figure 1 , Figure 2 As shown, an air inlet pipe 11 is arranged on the front side of the housing 1 of the recovery device, and an air outlet 12 is arranged on the top surface of the housing 1. Figure 2 As shown, a first filter element 5 is vertically arranged in the radial direction in the air intake pipe 11. The first filter element 5 is a metal filter mesh, which can perform a first filtering process on the inhaled airflow.

[0045] like Figure 2As shown, the first partition 14 and the second partition 15 are arranged from front to back in the shell 1. The first partition 14 and the second partition 15 divide the inner cavity of the shell 1 into a front air cavity 10, a rear air cavity 20, and a receiving cavity 30. The front air cavity 10 is connected to the air inlet pipe 11, and the rear air cavity 20 is connected to the air outlet 12. The first partition 14 is a vertical plate, the top edge of which is fixed on the top plate of the shell 1, and the bottom edge is fixed on the bottom plate 13 of the shell 1. The second partition 15 is an L-shaped plate, the top edge of which is fixed on the top plate of the shell, and the horizontal outer side edge is fixed on the rear side plate of the shell 1, separating the receiving cavity 30 on the rear upper side of the rear air cavity 20, so that the rear air cavity 20 forms an L-shaped cavity. A heat sink 17 is fixedly arranged on the rear side plate of the shell 1, corresponding to the receiving cavity 30. The heat sink 17 can dissipate the heat in the receiving cavity 30 to prevent the temperature in the receiving cavity 30 from being too high and burning the components installed therein. The bottom plate 13 of the shell 1 is a stepped plate with one step, including a high flat plate portion 131, a low flat plate portion 132, and a vertical plate portion 133 connecting the high and low flat plates. A low-lying area is formed at the lower part of the inner cavity of the shell 1 between the vertical plate portion 133 and the left side plate of the shell 1. The low-lying area becomes a liquid collection area for collecting filtered residual liquid; the bottom edge of the first partition plate 14 extends downward to the low flat plate portion 132, dividing the liquid collection area into a front liquid collection area 101 and a rear liquid collection area 201. The front liquid collection area 101 and the rear liquid collection area 201 are respectively located at the bottom of the front air cavity 10 and the rear air cavity 20. The low flat plate portion 132 is provided with a first oil outlet 1321 and a second oil outlet 1322 corresponding to the front liquid collection area 101 and the rear liquid collection area 201, respectively. The first oil outlet 1321 and the second oil outlet 1322 are used to discharge the filtered residual liquid from the front liquid collection area 101 and the rear liquid collection area 201, respectively. The vertical plate portion 133 is connected to the low flat plate portion 132 through the arc plate portion. A guide plate 16 is provided at the connection between the low flat plate portion 132 and the left side plate of the shell 1. The guide plate 16 is an arc plate. The arc plates at the two edges of the low flat plate portion 132 have a guiding effect on the filtered residual liquid, which can guide the filtered residual liquid to the oil outlet to prevent the residual liquid from being deposited in the shell 1.

[0046] like Figure 2 As shown, a second filter element 6 is vertically arranged in the front air cavity 10. The second filter element 6 is made of aluminum and can perform a second filter on the airflow. The second filter element 6 is arranged at the rear end of the high flat plate portion 131, and the residual liquid filtered by the second filter element 6 can flow directly downward along the vertical plate portion 133 to prevent the residual liquid from being deposited on the high flat plate portion 131.

[0047] like Figure 2 As shown, a fan 2 is arranged in the rear air cavity 20, just below the air outlet 12. The fan 2 is connected to a motor through a drive shaft, and the motor is arranged in the accommodating cavity 30 (the motor and the connection method with the fan 2 are not shown in the figure). An air suction port is opened on the first partition plate 14 directly facing the fan 2, and an air guide ring 3 is inserted into the air suction port. The fan 2 inhales external air through the air guide ring 3. Figure 2, Figure 3 As shown, the fan 2 has a rotating drum 21, which is a closed hollow drum. A plurality of blades 22 are evenly arranged on the outer periphery of the rotating drum 21 and along the circumferential direction. A front baffle 23 and a rear baffle 24 are fixed to the front and rear sides of the blades 22, respectively. The front baffle 23 is a concave arc plate with an air inlet 25 in the center. The rear baffle 24 is a vertical flat plate extending inwardly and connected to the rotating drum 21. An air outlet 26 is formed between adjacent blades 22 and the front baffle 23 and the rear baffle 24. Figure 4 As shown, the air guide ring 3 has an air guide portion 31 and a connecting portion 32. The air guide portion 31 is an inwardly concave arc plate. Figure 3 As shown, the rear end of the air guide portion 31 extends into the air inlet 25 of the front baffle 23 of the fan 2, ensuring that the airflow introduced by the air guide ring 3 flows into the fan 2, which is conducive to improving the utilization efficiency of the wind; the arc of the air guide portion 31 is arranged opposite to the arc of the front baffle 23 to form a U-shaped guide surface, which has a guiding effect on the airflow, reduces the airflow resistance, and makes the airflow flow smoother. The connecting portion 32 of the air guide ring 3 is fixed to the first partition 14 by fasteners.

[0048] like Figure 2 As shown, a cover shell 4 is mounted on the periphery of the fan 2, a buffer cavity 40 is formed between the cover shell 4 and the fan 2, the cover shell 4 is fixed to the second partition plate 15 through a connecting plate assembly, an air outlet channel is provided between the cover shell 4 and the fan 2, and the buffer cavity 40 is connected to the rear air cavity 20 through the air outlet channel; the cover shell 4 is arranged outside the fan 2, on the one hand, the cover shell 4 provides protection for the fan 2, prevents the fan 2 from being exposed directly below the air outlet 12, avoids oil, water or dust from entering the fan 2, protects the internal components of the fan 2, and prolongs the service life of the fan 2; on the other hand, a buffer cavity 40 is formed on the periphery of the fan 2, The airflow from the fan 2 first enters the buffer chamber 40, and then flows into the rear air chamber 20 from the air outlet channel after being evenly distributed in the buffer chamber 40, which is more conducive to improving the uniformity of airflow distribution, and can also reduce the resistance of airflow flow, making the airflow flow smoother. Moreover, the airflow will form a vortex in the buffer chamber 40. During the rotation of the airflow, the oil, water or dust in the airflow will also be thrown onto the inner wall surface of the cover shell 4 under the action of centrifugal force to achieve filtration. That is, the buffer chamber 40 can perform a third filtration on all the airflow inhaled by the fan 2, thereby improving the utilization efficiency of the wind and the filtration efficiency.

[0049] like Figure 5As shown, the housing 4 has a cylindrical outer cover plate 41, the front side of the outer cover plate 41 is connected to the front cover plate 42, the rear side of the outer cover plate 41 is connected to the rear connecting plate 43, the rear connecting plate 43 of the housing 4 is fixedly connected to the connecting plate assembly, and is fixed to the second partition plate 15 through the connecting plate assembly, and the connecting plate assembly covers the rear side of the housing 4. The front cover plate 42 is a circular flat plate, the outer edge of which is connected to the outer cover plate 41, and the inner edge of which is provided with an inner ring 44, which is perpendicular to the front cover plate 42 and extends axially inward into the housing 4; Figure 3 As shown, the front cover plate 42 and the inner ring 44 of the housing 4 are sleeved on the front baffle plate 23 of the fan 2 and the outer periphery of the air guide portion 31 of the air guide ring 3. There is a gap between the front cover plate 42 and the inner ring 44 and the front baffle plate 23 and the air guide ring 3 to form an air outlet channel. The airflow in the buffer cavity 40 flows into the rear air cavity 20 through the air outlet channel. The inner ring 44 can not only increase the strength of the front cover plate 42, but also better guide the airflow outward, reduce the airflow resistance, and make the airflow flow smoother. Figures 5 to 7 As shown, the outer cover plate 41 is formed by bending a long strip into a circle. After being bent into a circle, its two opposite edges are located at the lower side, and the two opposite edges are not connected. The edge of one side is radially turned outward to form an outer flange 411, and openings 45 are formed at the two edges, that is, an opening 45 is formed on the lower side of the housing 4. The opening 45 is connected to the buffer chamber 40. The opening 45 can discharge the oil, water or dust filtered out of the housing 4 downward to the rear liquid collection area 201 to avoid the residual filtered liquid from being deposited in the housing 4; the outer flange 411 of the outer cover plate 41 is inclined downward, which is more conducive to the downward flow of the residual filtered liquid. Figure 5 , Figure 6 As shown, a handle 46 is also provided on the outer peripheral surface of the outer cover plate 41 for extracting the cover shell 4 to facilitate the disassembly and assembly of the cover shell 4.

[0050] like Figure 2 As shown, a third filter element 7 is disposed at the top of the rear air cavity 20 and below the air outlet 12 to perform the final filtration on the discharged air flow. The third filter element 7 is a filter cotton that can completely isolate the oil mist in the rear air cavity 20. Figure 1 As shown, a micro pressure gauge 8 is provided on the left side surface of the shell 1, near the third filter element 7, and connected to the top of the rear air cavity 20. The micro pressure gauge 8 is used to detect the pressure at the top of the rear air cavity 20, and monitor the wind resistance in the rear air cavity 20 through pressure detection. When the pressure value of the micro pressure gauge 8 exceeds the rated value, it means that the wind resistance in the rear air cavity 20 is too large, which means that the density of the third filter element 7 reaches the limit value after absorbing the oil mist, and the third filter element 7 needs to be replaced in time.

[0051] like Figure 2As shown, a placement box 92 is provided in the frame body 91 of the base frame 9, and a first oil storage bottle 93 and a second oil storage bottle 94 are provided in the placement box 92. The first oil storage bottle 93 is connected to the front liquid collection area 101 through a pipeline, and the second oil storage bottle 94 is connected to the rear liquid collection area 201 through a pipeline. The front liquid collection area 101 and the rear liquid collection area 201 are respectively recovered and stored in the first oil storage bottle 93 and the second oil storage bottle 94. The left and right sides of the frame body 91 are covered with a cover plate 95, and the cover plate 95 has an observation window, through which the amount of oil recovered by the first oil storage bottle 93 and the second oil storage bottle 94 can be observed in real time. The front and rear sides of the frame 91 are respectively provided with a front door 96 and a rear door 97. After the first oil storage bottle 93 and the second oil storage bottle 94 are filled with recycled oil, the front door 96 or the rear door 97 can be opened to replace the oil storage bottle. Doors are provided on both the front and rear sides of the bottom frame 9, which is convenient for the operator to operate from any side, and is convenient for replacing the oil storage bottle, cleaning the placement box 92 or the inside of the frame 91. Rollers 98 are also provided at the four corners of the bottom of the frame 91 to facilitate the movement of the device and place the device at a designated location.

[0052] During actual use, the motor drives the fan 2 to rotate, and external air is sucked in from the air inlet pipe 11, enters the front air cavity 10 after the first filtration through the first filter element 5, enters the fan 2 from the air guide ring 3 after being filtered through the second filter element 6 in the front air cavity 10, and then enters the buffer cavity 40 from the air outlet 26 of the fan 2, enters the rear air cavity 20 from the air outlet channel after being evenly distributed and subjected to the third filtration in the buffer cavity 40, and then flows through the third filter element 7 for the last filtration before being discharged to the outside from the air outlet 12; the residual liquid filtered out of the front air cavity 10 and the rear air cavity 20 flows to the oil storage bottle through pipelines for recovery.

[0053] The above description is an explanation of the present invention, not a limitation of the present invention. The present invention may be modified in any form without violating the spirit of the present invention.

Claims

1. An oil mist recovery device, wherein an air inlet pipe (11) is arranged on the side of a housing (1), and an air outlet (12) is arranged on the top surface of the housing (1), characterized in that: The housing (1) comprises a front air cavity (10) and a rear air cavity (20) which are connected to each other, the front air cavity (10) is connected to the air inlet pipe (11), and the rear air cavity (20) is connected to the air outlet (12); A fan (2) is arranged in the rear air cavity (20), a cover (4) is sleeved on the outer periphery of the fan (2), a buffer cavity (40) is formed between the cover (4) and the fan (2), and the buffer cavity (40) is connected to the rear air cavity (20); the cover (4) has an outer cover plate (41), a front cover plate (42) is arranged on the front side of the outer cover plate (41), and the rear side of the outer cover plate (41) is fixed to the second partition plate (15) through a connecting plate assembly, and the connecting plate assembly is sealed on the rear side of the cover (4); the front cover plate (42) is provided inside An inner ring (44) is provided on the side, and the inner ring (44) extends into the interior of the housing (4) along the axial direction; the front cover plate (42) and the inner ring (44) are sleeved on the outer periphery of the front baffle plate (23) of the fan (2) and the air guide portion (31) of the air guide ring (3); there is a gap between the front cover plate (42) and the inner ring (44) and the front baffle plate (23) and the air guide ring (3), forming an air outlet channel; the airflow in the buffer cavity (40) flows into the rear air cavity (20) through the air outlet channel, and the inner ring (44) guides the airflow outward; An opening (45) is provided at the lower side of the outer cover plate (41). The outer cover plate (41) is formed by bending a long strip into a circle. After being bent into a circle, two opposite edges are located at the lower side. The two opposite edges are not connected. One edge is radially turned outward to form an outer flange (411), and the opening (45) is formed at the two edges. The outer flange (411) of the outer cover plate (41) is inclined downward.

2. The oil mist recovery device according to claim 1, characterized in that: A first partition (14) is arranged in the shell (1), and the first partition (14) divides the inner cavity of the shell (1) into a front air cavity (10) and a rear air cavity (20). An air suction port is provided on the first partition (14) directly facing the fan (2), and an air guide ring (3) is inserted into the air suction port. The air guide ring (3) connects the front air cavity (10) and the rear air cavity (20). The air guide ring (3) has an air guide portion (31) and a connecting portion (32). The air guide portion (31) is an inwardly concave arc plate, and the connecting portion (32) is fixed to the first partition (14) by a fastener.

3. The oil mist recovery device according to claim 1, characterized in that: The fan (2) comprises a hollow rotating drum (21), a plurality of blades (22) are evenly arranged on the outer circumference of the rotating drum (21) and in the circumferential direction, a front baffle plate (23) and a rear baffle plate (24) are provided on both sides of the blades (22), and an air outlet (26) is formed between adjacent blades (22) and the front baffle plates (23) and the rear baffle plates (24); the front baffle plate (23) is an inwardly concave arc-shaped plate, and the front baffle plate (23) has an air inlet (25).

4. The oil mist recovery device according to claim 2 or 3, characterized in that: The air guide portion (31) of the air guide ring (3) extends into the air inlet (25) of the front baffle (23) of the fan (2), and the arc of the air guide portion (31) is arranged opposite to the arc of the front baffle (23) to form a U-shaped guide surface.

5. The oil mist recovery device according to claim 1, characterized in that: A second partition (15) is further arranged in the shell (1) and spaced from the first partition (14). The second partition (15) is an L-shaped plate, the top edge of which is fixed to the top plate of the outer shell, and the horizontal outer side edge of which is fixed to the rear side plate of the shell (1). The second partition (15) separates a receiving chamber (30) at the rear upper side of the rear air cavity (20); the fan (2) is connected to the motor, and the motor is arranged in the receiving chamber (30); and a heat dissipation plate (17) is arranged on the rear side plate of the shell (1) corresponding to the receiving chamber (30).

6. The oil mist recovery device according to claim 1, characterized in that: The housing (4) has a cylindrical outer cover plate (41), a rear side edge of the outer cover plate (41) is provided with a rear connecting plate (43), and the rear connecting plate (43) is fixed to the second partition plate (15) through a connecting plate assembly.

7. The oil mist recovery device according to claim 1, characterized in that: The bottom plate (13) of the shell (1) is a stepped plate having a high flat plate portion (131), a low flat plate portion (132), and a vertical plate portion (133) connecting the high and low flat plates, forming a low-lying liquid collection area at the lower part of the inner cavity of the shell (1); the first partition plate (14) extends to the low flat plate portion (132), dividing the liquid collection area into a front liquid collection area (101) and a rear liquid collection area (201), the front liquid collection area (101) and the rear liquid collection area (201) 1) are respectively located at the bottom of the front air cavity (10) and the rear air cavity (20); a first oil outlet hole (1321) and a second oil outlet hole (1322) are respectively provided on the low flat plate portion (132) corresponding to the front liquid collecting area (101) and the rear liquid collecting area (201); the vertical plate portion (133) and the low flat plate portion (132) are connected via an arc plate portion, and an arc-shaped guide plate (16) is provided between the low flat plate portion (132) and the left side plate of the housing (1).

8. The oil mist recovery device according to claim 1, characterized in that: A first filter element (5) is radially arranged in the air inlet pipe (11); a second filter element (6) is vertically arranged in the front air cavity (10); and a third filter element (7) is arranged at the top of the rear air cavity (20) and below the air outlet (12); the first filter element (5) and the second filter element (6) are metal filter elements, and the third filter element (7) is filter cotton.

9. The oil mist recovery device according to claim 1, characterized in that: A micro pressure gauge (8) is provided on the side of the housing (1) near the third filter element (7), and the micro pressure gauge (8) is connected to the rear air cavity (20).

10. The oil mist recovery device according to claim 1, characterized in that: The housing (1) is arranged on a base frame (9); a storage box (92) is arranged in a frame body (91) of the base frame (9); a first oil storage bottle (93) and a second oil storage bottle (94) are arranged in the storage box (92); the first oil storage bottle (93) is connected to a front liquid collection area (101) through a pipeline; the second oil storage bottle (94) is connected to a rear liquid collection area (201) through a pipeline; left and right sides of the frame body (91) are covered with a cover plate (95); the cover plate (95) has an observation window; front and rear sides of the frame body (91) are respectively provided with a front door (96) and a rear door (97); and a roller (98) is arranged at the bottom of the frame body (91).

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