A gantry milling machine oil mist recovery and cleaning device

Abstract

This invention relates to the field of gantry milling machine technology, and discloses a gantry milling machine oil mist recovery and cleaning device, including a primary recovery and treatment mechanism and a secondary recovery and treatment mechanism, and a connecting pipe between the two. The primary recovery and treatment mechanism includes an inner pipe and an outer sleeve outside the inner pipe. A blower is installed at the upper opening of the inner pipe. The inner pipe includes an upper mounting section, a middle connecting section, and a lower air outlet section with coaxial but unequal diameters. The middle connecting section is a frustum shape with a diameter increasing from bottom to top. A water pipe is installed on the upper mounting section, with one end of the water pipe extending into the upper mounting section and equipped with a nozzle. A connector is installed on the outer surface of the outer sleeve, and the end of the connector is connected to an input pipe. This solution can effectively recover and purify the oil mist generated by the gantry milling machine, thereby reducing oil mist pollution to the environment, reducing the concentration of particulate matter in the air, improving the working environment of the production workshop, and saving production costs by collecting and reusing the oil mist.

Description

Technical Field

[0001] This invention relates to the field of gantry milling machine technology, and more specifically to an oil mist recovery and cleaning device for gantry milling machines. Background Technology

[0002] A gantry milling machine is a machine tool in which the working table moves back and forth between two columns. During the processing, the gantry milling machine will generate oil mist, which will pollute the surrounding workshop environment. Therefore, it is necessary to collect and treat the oil mist.

[0003] Based on a search for machine tool oil mist recovery, a Chinese utility model patent was found, with authorization announcement number CN220007000U. This patent discloses an oil mist recovery device for a gantry milling machine. It uses an air pump to draw oil mist into a recovery tank, and then sprays cleaning fluid through nozzles to liquefy the oil mist and cause it to fall onto a filter plate, thus achieving oil mist recovery. However, it still has some shortcomings that need improvement. For example, using an air pump to draw oil mist can easily cause oil mist to adhere to the internal structure of the air pump, which can easily lead to abnormal operation of the air pump over time. An additional swing mechanism is needed to drive the nozzles to spray in a fan shape to ensure sufficient contact between the oil mist and the cleaning fluid, which needs improvement. The amount of oil mist generated during machine tool processing is uncontrollable, therefore the amount of oil mist entering the recovery tank is also uncontrollable. The amount of cleaning fluid sprayed through the nozzles is fixed, which can easily lead to over-spraying or under-spraying. The former results in wasted cleaning fluid, while the latter results in incomplete oil mist recovery.

[0004] Based on the above, the present invention proposes an oil mist recovery and cleaning device for gantry milling machines. Summary of the Invention

[0005] To address the problems mentioned in the background above, the present invention provides an oil mist recovery and cleaning device for gantry milling machines.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows.

[0007] A gantry milling machine oil mist recovery and cleaning device includes a primary recovery and treatment mechanism and a secondary recovery and treatment mechanism and a connecting pipe between the two. The primary recovery and treatment mechanism includes an inner pipe and an outer pipe disposed outside the inner pipe.

[0008] A blower is installed at the upper opening of the inner pipe. The inner pipe is divided into an upper installation section, a middle connecting section, and a lower air outlet section along the axis. The upper installation section and the lower air outlet section are both cylindrical. The middle connecting section is a frustum-shaped section with the diameter increasing from bottom to top. A water pipe is installed on the upper installation section. One end of the water pipe is connected to a water source, and the other end extends into the upper installation section and is equipped with several nozzles. The outer circular surface of the outer pipe is equipped with a nozzle. The end of the nozzle is connected to an input pipe, and the end of the input pipe is used to receive oil mist.

[0009] As a further improvement and optimization of the present invention, a propeller blade is provided in the lower pipe opening of the lower air outlet section. Multiple propeller blades are arranged in an array along the circumferential direction of the lower air outlet section. The airflow output through the lower air outlet section is spiraled downward after being guided by the propeller blades.

[0010] As a further improvement and optimization of the present invention, the bottom of the outer tube is connected to an output pipe, the bottom of the output pipe is provided with an outer casing, the bottom of the outer casing is provided with a bottom pipe, a liquid storage tank is provided below the bottom pipe, the bottom of the bottom pipe extends into the liquid storage tank and is close to the bottom of the tank, the outer circular surface of the bottom pipe is provided with a side nozzle, the side nozzle is connected to the connecting pipe, and multiple enrichment units are arranged in an array along the vertical direction inside the outer casing.

[0011] As a further improvement and optimization of the present invention, the outer surface of the liquid storage tank is provided with lugs, and a drain valve is provided on the lugs.

[0012] As a further improvement and optimization of the present invention, the enrichment unit includes an upper fan blade and a lower fan blade disposed inside the outer casing. The upper fan blade is provided with an upper clearance channel for airflow, the upper clearance channel being close to the cavity wall of the outer casing. The lower fan blade is provided with a lower clearance channel for airflow, the lower clearance channel being close to the axis of the outer casing. The lower fan blade also includes an annular groove, the annular groove being coaxially connected to the cavity wall of the outer casing. A bent tube is provided at the bottom of the annular groove, and the end of the bent tube extends out of the outer casing.

[0013] The ends of the bends of multiple enrichment units are connected by drain pipes, which are connected to the storage tank.

[0014] As a further improvement and optimization of the present invention, an auxiliary pipe is provided on the liquid storage tank, and the lower end of the auxiliary pipe is close to the bottom of the liquid storage tank.

[0015] As a further improvement and optimization of the present invention, the air inlet end of the blower is provided with a first filter element, multiple water pipes are arranged in an array along the circumferential direction of the upper mounting section, multiple connectors are arranged in an array along the circumferential direction of the outer sleeve, and multiple input pipes are correspondingly provided.

[0016] As a further improvement and optimization of the present invention, the secondary recycling and processing mechanism includes a mounting shell, an exhaust port and an air inlet port on the upper surface of the mounting shell, the air inlet port being connected to a connecting pipe, a second filter element being provided at the upper opening of the exhaust port, a drain port being provided at the bottom of the mounting shell, and a recycling unit being provided inside the mounting shell.

[0017] As a further improvement and optimization of the present invention, the recycling unit includes an inner support, on which a synchronous belt group is provided. The synchronous belt group includes two pulleys with their center lines arranged vertically and made of insulating material, and a synchronous belt made of conductive material disposed between the two pulleys. The motor that drives the synchronous belt group to run is disposed on the outer surface of the mounting housing.

[0018] The synchronous belt group moves in a direction parallel to the length of the mounting housing. There are two synchronous belt groups along the width of the mounting housing, and a discharge electrode is provided between the two synchronous belt groups.

[0019] As a further improvement and optimization of the present invention, a scraper is provided inside the mounting housing. There are two scrapers, which are located on opposite sides of the two synchronous belt groups respectively. The scrapers are arranged at an angle and are in contact with the synchronous belts. The scrapers are made of insulating material. The distance between the scraper and the bottom of the mounting housing decreases along the movement direction of the synchronous belt groups. The drain port is located below the scraper and close to the lowest point of the scraper.

[0020] Compared with the prior art, the beneficial effects of this invention are as follows:

[0021] This solution can effectively recover and purify the oil mist generated by gantry milling machines, thereby reducing oil mist pollution to the environment, lowering the concentration of particulate matter in the air, improving the working environment of the production workshop, and saving production costs by collecting and reusing the oil mist. Furthermore:

[0022] 1. When this solution draws in oil mist: The airflow generated by the blower flows from top to bottom in the inner pipe. Since the diameter of the lower opening of the inner pipe is smaller than that of the upper opening, the airflow velocity through the lower opening of the inner pipe is faster. Based on Bernoulli's principle, a negative pressure is formed near the lower opening of the inner pipe. This negative pressure can draw in the oil mist. The oil mist enters the outer pipe through the input pipe and nozzle and merges with the airflow, flowing along with it. The advantages are: firstly, it can prevent the oil mist from sticking to the blower; secondly, if the amount of oil mist generated during gantry milling is small, then if the air density near the input pipe is relatively low and the weight is relatively small, the oil mist gas drawn into the outer pipe under the negative pressure will be drawn in. The flow rate is relatively fast. If the amount of oil mist generated is large, the density and weight of the air near the input pipe are relatively high. Under negative pressure traction, the flow rate of the oil mist gas drawn into the outer tube is relatively slow. In other words, this method of negative pressure traction of oil mist gas based on Bernoulli's principle can adapt to the amount of oil mist generated by gantry milling. It solves the problem mentioned in the background technology that "the amount of oil mist generated during machine tool processing is uncontrollable, so the amount of oil mist entering the recovery box is uncontrollable. The cleaning liquid sprayed through the nozzle is quantitative, so it is easy to spray too much or too little. The former results in waste of cleaning liquid, and the latter results in incomplete oil mist recovery and treatment."

[0023] 2. As the airflow exits through the lower opening of the inner pipe, the propeller blades cause the airflow to flow downwards in a spiral manner. The advantage is that the water mist sprayed through the nozzle flows along with the airflow. The spiral airflow has a stirring effect and a centrifugal force effect. The combination of the two can make the water mist evenly distributed on the outside of the airflow. When the oil mist merges into the airflow, it immediately gathers together under the molecular force of the water mist to form water droplets. The water droplets fall with the airflow. At the same time, the stirring effect can make the oil mist and water mist come into uniform and comprehensive contact. Attached Figure Description

[0024] Figure 1 A schematic diagram of an existing gantry milling machine. Figure 1 ;

[0025] Figure 2 A schematic diagram of an existing gantry milling machine. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the present invention;

[0027] Figure 4 A partial diagram of a primary recycling and processing facility. Figure 1 ;

[0028] Figure 5 Partial cross-section of a primary recycling facility Figure 1 ;

[0029] Figure 6 This is a schematic diagram of the internal piping.

[0030] Figure 7 A partial diagram of a primary recycling and processing facility. Figure 2 ;

[0031] Figure 8 Partial cross-section of a primary recycling facility Figure 2 ;

[0032] Figure 9 A schematic diagram of enriched units;

[0033] Figure 10 This is a schematic diagram of the secondary recycling and processing facility;

[0034] Figure 11 This is a partial schematic diagram of the secondary recycling and processing facility;

[0035] Figure 12 This is a sectional view of the mounting shell;

[0036] Figure 13 This is a schematic diagram of a recycling unit.

[0037] The labels in the attached diagram are:

[0038] 100. Primary recycling and processing mechanism; 101. First filter element; 102. Blower; 103. Inner pipe; 104. Water pipe; 105. Nozzle; 106. Outer pipe; 107. Connector; 108. Output pipe; 109. Propeller blade; 110. Input pipe; 111. Storage tank; 112. Lug; 113. Drain valve; 114. Auxiliary pipe; 115. Outer casing; 116. Bottom Pipe; 117, Enrichment unit; 1171, Upper fan blade; 1172, Lower fan blade; 1173, Bend; 118, Drain pipe; 200, Secondary recovery and treatment mechanism; 201, Mounting housing; 2011, Inner support; 2012, Drain port; 202, Second filter element; 203, Recovery unit; 2031, Synchronous belt assembly; 2032, Discharge electrode; 2033, Scraper; 300, Connecting pipe. Detailed Implementation

[0039] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0040] Reference Figures 3-13 A gantry milling machine oil mist recovery and cleaning device includes a primary recovery and treatment mechanism 100, a secondary recovery and treatment mechanism 200, and a connecting pipe 300 disposed between the two.

[0041] Primary recycling and processing facility 100:

[0042] Reference Figures 4-9 The primary recycling and processing unit 100 includes an inner pipe 103 and an outer pipe 106 disposed outside the inner pipe 103.

[0043] A blower 102 is installed at the upper opening of the inner pipe 103. Preferably, a first filter element 101 is installed at the air inlet of the blower 102, which can be achieved using existing filtration technology and will not be described in detail. The inner pipe 103 is divided into an upper mounting section, a middle connecting section, and a lower air outlet section along the axial direction. The upper mounting section and the lower air outlet section are both cylindrical, while the middle connecting section is a frustum-shaped section with the diameter increasing from bottom to top. A water pipe 104 is installed on the upper mounting section, and one end of the water pipe 104 is connected to a water source, such as water. The pump's outlet is connected to the water pump's inlet, which is connected to the water storage tank. The other end of the water pipe 104 extends into the upper mounting section and is equipped with several nozzles 105. Furthermore, multiple water pipes 104 are arranged in an array along the circumference of the upper mounting section. Furthermore, a propeller blade 109 is installed in the lower pipe opening of the lower air outlet section, and multiple propeller blades 109 are arranged in an array along the circumference of the lower air outlet section. The airflow output through the lower air outlet section is then guided by the propeller blades 109 and output downwards in a spiral manner. The advantages of this are explained in detail later.

[0044] The outer surface of the outer sleeve 106 is provided with a nozzle 107. The end of the nozzle 107 is connected to an input pipe 110. The end of the input pipe 110 is used to receive oil mist. Preferably, multiple nozzles 107 are arranged in an array along the circumference of the outer sleeve 106, and multiple input pipes 110 are correspondingly arranged. The ends of the multiple input pipes 110 can be distributed at different positions of the gantry machine tool to improve the comprehensiveness of oil mist extraction.

[0045] The bottom of the outer tube 106 is connected to the output pipe 108. The bottom of the output pipe 108 is provided with an outer cover 115. The bottom of the outer cover 115 is provided with a bottom tube 116. The bottom of the bottom tube 116 is provided with a liquid storage tank 111. The bottom of the bottom tube 116 extends into the liquid storage tank 111 and is close to the bottom of the tank. The outer circular surface of the bottom tube 116 is provided with a side nozzle, which is connected to the connecting pipe 300.

[0046] The outer surface of the liquid storage tank 111 is provided with lugs 112, and a drain valve 113 is provided on the lugs 112. An enrichment component is provided inside the outer casing 115.

[0047] The enrichment assembly includes multiple enrichment units 117 arranged in a vertical array within the outer casing 115. Further, each enrichment unit 117 includes an upper fan blade 1171 and a lower fan blade 1172 disposed within the outer casing 115. The upper fan blade 1171 is provided with an upper clearance channel for airflow, which is close to the cavity wall of the outer casing 115. The lower fan blade 1172 is provided with a lower clearance channel for airflow, which is close to the axis of the outer casing 115. The lower fan blade 1172 also includes an annular groove, which is coaxially connected to the cavity wall of the outer casing 115. A bent tube 1173 is provided at the bottom of the annular groove, and the end of the bent tube 1173 extends out of the outer casing 115.

[0048] The ends of the bends 1173 of the multiple enrichment units 117 are connected by a drain pipe 118, which is connected to the storage tank 111.

[0049] The working process of the primary recycling and processing facility 100 is specifically manifested as follows:

[0050] The airflow generated by the start of blower 102 flows from top to bottom in inner pipe 103. Since the diameter of the lower opening of inner pipe 103 is smaller than the diameter of the upper opening, the airflow velocity through the lower opening of inner pipe 103 is relatively high. Based on Bernoulli's principle, a negative pressure is formed near the lower opening of inner pipe 103. This negative pressure can draw in oil mist. The oil mist enters outer pipe 106 through input pipe 110 and nozzle 107, and merges with the airflow, flowing along with it. The advantages are twofold: firstly, it prevents oil mist from adhering to blower 102; secondly, if the amount of oil mist generated during gantry milling is small, the air density and weight near input pipe 110 are relatively low, and under the traction of negative pressure, it is drawn into outer pipe. The flow rate of the oil mist gas inside 106 is relatively fast. If the amount of oil mist generated is large, the density and weight of the air near the input pipe 110 are relatively high. Under negative pressure traction, the flow rate of the oil mist gas drawn into the outer sleeve 106 is relatively slow. In other words, this method of negative pressure traction of oil mist gas based on Bernoulli's principle can adapt to the amount of oil mist generated by the gantry machine tool. It solves the problem mentioned in the background technology that "the amount of oil mist generated during the machine tool processing is uncontrollable, so the amount of oil mist entering the recovery box is uncontrollable. The cleaning liquid sprayed through the nozzle is quantitative, so it is easy to spray too much or too little. The former results in waste of cleaning liquid, and the latter results in incomplete oil mist recovery and treatment."

[0051] As the airflow is output through the lower opening of the inner pipe 103, the propeller blade 109 enables the airflow to flow downward in a spiral state. The advantage is that the water mist sprayed through the nozzle 105 flows along with the airflow. The spiral airflow has a stirring effect and a centrifugal force effect. The combination of the two can make the water mist evenly distributed on the outside of the airflow. When the oil mist merges into the airflow, it immediately gathers together under the molecular force of the water mist to form water droplets. The water droplets fall with the airflow. At the same time, the stirring effect can make the oil mist and water mist come into uniform and comprehensive contact.

[0052] Water droplets and airflow descend and fall onto enrichment unit 117, passing through upper and lower clearance openings in sequence. During this process, water droplets remain on upper fan blade 1171 and lower fan blade 1172, while airflow enters secondary recovery and treatment mechanism 200 through connecting pipe 300. It should be noted that since the lower opening of bottom pipe 116 is close to the bottom of liquid storage tank 111, which contains water, the lower opening of bottom pipe 116 is sealed by water. Water droplets fall into annular groove along upper fan blade 1171 and lower fan blade 1172, and flow into liquid storage tank 111 through bend pipe 1173 and drain pipe 118. Bend pipe 1173 can store some liquid. Therefore, gas cannot be output through bottom pipe 116 or bend pipe 1173, but can only be output through connecting pipe 300.

[0053] After water droplets fall into the storage tank 111, the oil mist will float on the surface. When the drain valve 113 is opened, the oil mist floating on the surface can be discharged through the drain valve 113. It should be noted that after processing, some oil mist will float on the surface, but the surface level is lower than the drain valve 113 and cannot be discharged. In this case, an auxiliary pipe 114 with its bottom near the bottom of the storage tank 111 can be installed. Water can be injected through the auxiliary pipe 114 to raise the surface level, so that the last part of the oil mist can be discharged smoothly through the drain valve 113.

[0054] Secondary recycling and processing facility 200:

[0055] The primary recycling unit 100 can recover most of the oil mist, but inevitably a small amount of oil mist components will not be recovered. Therefore, this small amount of oil mist components can be recovered through the secondary recycling unit 200.

[0056] Reference Figures 10-13 The secondary recycling and processing mechanism 200 includes a mounting shell 201. The upper surface of the mounting shell 201 is provided with an exhaust port and an air inlet port. The air inlet port is connected to a connecting pipe 300. A second filter element 202 is provided at the upper opening of the exhaust port. A drain port 2012 is provided at the bottom of the cavity of the mounting shell 201.

[0057] The mounting housing 201 is equipped with a recycling unit 203. The recycling unit 203 includes an inner support 2011. A synchronous belt assembly 2031 is mounted on the inner support 2011. The synchronous belt assembly 2031 includes two pulleys with their centerlines arranged vertically and made of insulating material, and a synchronous belt made of conductive material disposed between the two pulleys. The motor that drives the synchronous belt assembly 2031 is disposed on the outer surface of the mounting housing 201.

[0058] The synchronous belt assembly 2031 moves in a direction parallel to the length of the mounting housing 201. Two synchronous belt assemblies 2031 are arranged along the width of the mounting housing 201. A discharge electrode 2032 is arranged between the two synchronous belt assemblies 2031. The synchronous belt acts as a dust collection electrode, forming an electrostatic dust removal structure with the discharge electrode 2032. After the airflow enters the mounting housing 201 through the connecting pipe 300, it will pass through the area between the synchronous belt assembly 2031 and the discharge electrode 2032, and then be output to the outside through the second filter element 202. During this process, under the action of the electrostatic field, oil mist components will be adsorbed on the surface of the synchronous belt.

[0059] Scraper 2033 is provided inside the mounting housing 201. There are two scraper 2033s, which are located on opposite sides of the two synchronous belt sets 2031. The scraper 2033 is arranged at an angle and is in contact with the synchronous belt. The scraper 2033 is made of insulating material. The distance between the scraper 2033 and the bottom of the mounting housing 201 decreases along the direction of movement of the synchronous belt set 2031. Therefore, during the operation of the synchronous belt set 2031, the oil mist components adsorbed on the surface of the synchronous belt can be scraped off by the scraper 2033. The drain port 2012 is located below the scraper 2033 and close to the lowest point of the scraper 2033. Therefore, the scraped oil mist components are output to the outside through the drain port 2012.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gantry machine tool oil mist recovery cleaning device, comprising a first recovery treatment mechanism (100) and a second recovery treatment mechanism (200), and a connecting pipeline (300) arranged between the two, characterized in that, The primary recycling and processing unit (100) includes an inner pipe (103) and an outer pipe (106) disposed outside the inner pipe (103). A blower (102) is installed at the upper pipe opening of the inner pipe (103). The inner pipe (103) is divided into an upper installation section, a middle connecting section and a lower air outlet section with different diameters along the axis. The upper installation section and the lower air outlet section are both cylindrical. The middle connecting section is a frustum shape with the diameter increasing from bottom to top. A water pipe (104) is installed on the upper installation section. One end of the water pipe (104) is connected to a water source, and the other end extends into the upper installation section and is equipped with several nozzles (105). A nozzle (107) is installed on the outer circular surface of the outer pipe (106). The end of the nozzle (107) is connected to an input pipe (110). The end of the input pipe (110) is used to receive oil mist. A propeller blade (109) is installed inside the lower pipe opening of the lower air outlet section. Multiple propeller blades (109) are arranged in an array along the circumferential direction of the lower air outlet section. The airflow output through the lower air outlet section is spiraled downward after being guided by the propeller blades (109). The bottom of the outer tube (106) is connected to the output pipe (108), the bottom of the output pipe (108) is provided with an outer shell (115), the bottom of the outer shell (115) is provided with a bottom tube (116), the bottom of the bottom tube (116) is provided with a liquid storage tank (111), the bottom of the bottom tube (116) extends into the liquid storage tank (111) and is close to the bottom of the tank, the outer surface of the bottom tube (116) is provided with a side nozzle, the side nozzle is connected to the connecting pipe (300), and multiple enrichment units (117) are arranged in a vertical array inside the outer shell (115). The enrichment unit (117) includes an upper fan blade (1171) and a lower fan blade (1172) disposed inside the outer casing (115). The upper fan blade (1171) is provided with an upper clearance channel for airflow, which is close to the cavity wall of the outer casing (115). The lower fan blade (1172) is provided with a lower clearance channel for airflow, which is close to the axis of the outer casing (115). The lower fan blade (1172) also includes an annular groove, which is coaxially connected to the cavity wall of the outer casing (115). A bent pipe (1173) is provided at the bottom of the annular groove, and the end of the bent pipe (1173) extends out of the outer casing (115). The ends of the bends (1173) of multiple enrichment units (117) are connected by a drain pipe (118), which is connected to the storage tank (111).

2. The gantry milling machine oil mist recovery and cleaning device according to claim 1, characterized in that, The outer surface of the liquid storage tank (111) is provided with lugs (112), and a drain valve (113) is provided on the lugs (112).

3. The gantry milling machine oil mist recovery and cleaning device according to claim 2, characterized in that, An auxiliary pipe (114) is provided on the liquid storage tank (111), and the lower end of the auxiliary pipe (114) is close to the bottom of the liquid storage tank (111).

4. The gantry milling machine oil mist recovery and cleaning device according to claim 1, characterized in that, The blower (102) is provided with a first filter element (101) at the air inlet end, multiple water pipes (104) are arranged in an array along the circumferential direction of the upper installation section, multiple connectors (107) are arranged in an array along the circumferential direction of the outer sleeve (106), and multiple input pipes (110) are provided accordingly.

5. The gantry milling machine oil mist recovery and cleaning device according to claim 1, characterized in that, The secondary recycling and processing unit (200) includes a mounting shell (201), the upper surface of which is provided with an exhaust port and an air inlet port. The air inlet port is connected to a connecting pipe (300). A second filter element (202) is provided at the upper opening of the exhaust port. A drain port (2012) is provided at the bottom of the cavity of the mounting shell (201). A recycling unit (203) is provided inside the mounting shell (201).

6. The gantry milling machine oil mist recovery and cleaning device according to claim 5, characterized in that, The recycling unit (203) includes an inner support (2011), on which a synchronous belt assembly (2031) is provided. The synchronous belt assembly (2031) includes two pulleys with their axis arranged vertically and made of insulating material, and a synchronous belt made of conductive material disposed between the two pulleys. The motor that drives the synchronous belt assembly (2031) is disposed on the outer surface of the mounting housing (201). The direction of motion of the synchronous belt group (2031) is parallel to the length direction of the mounting shell (201). There are two synchronous belt groups (2031) along the width direction of the mounting shell (201), and a discharge electrode (2032) is provided between the two synchronous belt groups (2031).

7. The gantry milling machine oil mist recovery and cleaning device according to claim 6, characterized in that, The mounting housing (201) is equipped with a scraper (2033). There are two scrapers (2033) and they are located on opposite sides of the two synchronous belt groups (2031). The scrapers (2033) are arranged at an angle and are in contact with the synchronous belt. The scrapers (2033) are made of insulating material. The distance between the scraper (2033) and the bottom of the mounting housing (201) decreases along the direction of movement of the synchronous belt group (2031). The drain port (2012) is located below the scraper (2033) and close to the lowest point of the scraper (2033).

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