Hanging tool, hanging tool cleaning equipment and working method of hanging tool cleaning equipment

Abstract

The invention discloses a hanging tool, hanging tool cleaning equipment and a working method of the hanging tool cleaning equipment, and relates to the technical field of metal surface coating processes and coating waste paint removal. According to the hanger, the conductive metal tube is coated with the fluorine-containing composite material (such as PFA and FEP), so that a low-friction, high-temperature-resistant and corrosion-resistant composite structure is formed, and the powder adsorption rate is remarkably reduced. Due to the design of the cross section and the selection of materials, the binding force of powder and the hanging tool is reduced due to a special cavity between the paint layer and the hanging tool, so that the difficulty of paint layer separation is reduced. A hollow gas guide channel and a T-shaped gas guide groove are formed in the self-cleaning device, and the self-cleaning function is achieved through gas purging. The matched powder separation equipment utilizes a gas generator and a powder-gas separation device, negative pressure convection is formed in a sealed cavity, residual powder on the surface of the hanger is efficiently removed, and energy consumption and pollution of a traditional paint removal process are avoided. The powder adsorption amount is reduced, the hanger turnover and maintenance cost is reduced, the production efficiency is improved, and environmental protection and economical efficiency are both considered.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface coating technology and coating waste paint stripping, in particular to a hanger, hanger cleaning equipment and a working method thereof. Background Art

[0002] In spray coating production, hangers are essential tooling for the electrostatic spraying process, improving efficiency and reducing energy consumption. Due to their conductive properties, hangers can also accumulate electrostatic powder and paint. This coating, cured in the curing and drying tunnels of the electrostatic spraying process, can affect the conductivity of the coated object and lead to significant cost savings. In existing processes, hangers are typically regularly disposed of to ensure recycling, making the handling of the powder coating on hangers a crucial component of powder coating production.

[0003] The pain points of existing technology: 1. Both the hanger and the product have a certain degree of conductivity (even with a certain insulating coating, this does not prevent adhesion), resulting in adhesion between the product, the hanger, and the powder. Therefore, removing the powder from the hanger would damage the product, requiring removal after the product has been removed, which is after the curing process. 2. After the curing process, the strong adhesion between the powder and the hanger necessitates forceful removal methods such as shot blasting, which can cause deformation and damage to the hanger. 3. Post-processing also results in energy loss and environmental pollution. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a hanger, dust separation equipment and a working method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a hanger, comprising a hanger body, an air inlet being provided on the upper portion of the hanger body, the hanger body being composed of a hollow metal inner tube and an H-shaped hollow metal tube set which is movably connected, an outer tube being provided outside the hollow metal inner tube, the outer diameter of the H-shaped hollow metal tube set being adapted to the inner diameter of a cavity provided inside a plurality of outer packaging parts, a groove being provided on the outer upper portion of the outer packaging part being adapted to a T-shaped air guide groove; a first air guide hole being provided on the air guide groove; second air guide holes (43) being provided on the groove at equal intervals; the air holes being adapted to the first air guide hole and the second air guide hole after being aligned, the plurality of outer packaging parts being connected via a three-way joint made of the same material and having the same structure, and a T-shaped air guide groove being provided on the upper portion.

[0006] Preferably, the outer tube, outer package and tee joint are made of fluorine-containing composite materials including but not limited to PFA, FEP and ETPE; the main hollow metal inner tube and the H-shaped hollow metal tube kit are made of conductive materials, and the conductive materials include but are not limited to iron wire, iron rod, steel bar, copper wire and other general conductive materials, which serve as conductive functions.

[0007] Preferably, the outer tube and the outer package are integrally formed by inlaying the hollow metal inner tube containing the conductive material and the H-shaped hollow metal tube kit in the middle through an injection molding process.

[0008] Preferably, the hollow metal inner tube, the H-shaped hollow metal tube kit and the outer casing are adapted to each other after machining, and the H-shaped hollow metal tube kit is composed of multiple sections of metal tubes.

[0009] Preferably, the cross-section of the outer package includes but is not limited to a circle, an ellipse, a triangle, a cone and a teardrop shape.

[0010] Preferably, one end of the combined hollow metal inner tube and outer tube of one of the hanger bodies is used in combination with the hanger bodies arranged up and down in sequence, and the three-way joint is replaced by a four-way joint, and a multi-layer and multi-shape design is modularized according to needs.

[0011] The present invention also provides a method for manufacturing a hanger, wherein the outer tube and the outer package are made into a modularly designed mold, and a corrosion-resistant and high-temperature resistant coating is added to the outer tube and the outer package by an ordinary injection molding machine. The fluorine-containing composite material is heated to a molten state and injected into the mold corresponding to the hollow metal inner tube containing the conductive material and the H-shaped hollow metal tube kit, and then cooled and formed.

[0012] Preferably, the outer tube and outer casing of the fluorine-containing composite material are machined to match the hollow metal inner tube and the H-shaped hollow metal tube set made of conductive material.

[0013] In the third aspect, the present invention also provides a powder separation device for the hanger described in the first aspect, comprising a gas generator and a powder-gas separation device, wherein the gas generator is connected to the upper part of the closed cavity formed by the isolation plate through an air blowing pipe, and then a plurality of air blowing pipes are separated and evenly distributed on the inner wall of the isolation plate, and a plurality of air holes are opened in the air blowing pipe; a recovery device is respectively provided on the upper left side and the lower right side of the closed cavity, and the two groups of recovery devices are connected to the dust recovery pipe and then to the powder-gas separation device, and the powder-gas separation device forms a negative pressure, and the gas generator and the powder-gas separation device form a mixed convection of gas and dust and then enter the recovery device.

[0014] Furthermore, multiple hanger bodies are lined up to enter the device, and the gas from the upper air blowing pipe is blown in obliquely from top to bottom to blow away the external dust of the hanger body. At the same time, gas is blown in at the air inlet. The gas passes through the hollow metal inner tube, the first air guide hole, the second air guide hole, and then through the T-shaped air guide groove to blow the dust of the outer package into the closed cavity, and then enters the recovery device to achieve dust separation.

[0015] (1) Reduce the adsorption rate of powder: Due to the special design of the hanger, the powder adsorption rate of the hanger will be reduced by 80%; (2) The adsorption force between powder and hanger is very small: the adsorption force of the powder that has not been removed on the hanger is very small, and the product can be detached from the hanger by blowing air with low pressure; (III) Improved production efficiency: In existing processes, hangers need to be frequently removed from the line and repeatedly processed in incineration, soaking, and pyrolysis furnaces. Hangers can be used for a long time, reducing hanger turnover time and improving production efficiency.

[0016] (4) Reduced manufacturing costs: The absence of a solidified powder layer on the hanger significantly reduces powder loss, reduces hanger turnover, reduces labor requirements, and significantly reduces manufacturing costs. In the current competitive market environment, reducing cost pressure creates conditions for companies to increase profits.

[0017] (5) Reduce environmental pollution: In existing processes, the incineration of paint layers wastes electricity and natural gas, generating air pollution. Chemical treatments also result in the discharge of wastewater, and processes such as liquid nitrogen generate large amounts of solid waste. These all pose significant risks to the environment on which we depend. This solution can significantly reduce pollution and waste within a year. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural diagram of a hanger provided in accordance with the first embodiment of the present invention; Figure 2 A diagram showing the internal metal material structure of the hanger provided in the first embodiment of the present invention; Figure 3 A cross-sectional view of a hanger provided in accordance with a first embodiment of the present invention; Figure 4 A structural diagram of a three-way joint provided in the first embodiment of the present invention; Figure 5 A diagram showing the working principle of the first embodiment of the present invention; Figure 6 A cross-sectional view of the outer package provided in accordance with the first embodiment of the present invention; Figure 7 This is a structural diagram of a powder separation device according to a second embodiment of the present invention; Figure 8This is a diagram showing the working principle of the powder gas circulation according to the second embodiment of the present invention; Figure 9 This is a diagram showing the use state of the hanger of the present invention; Figure 10 is a cross-sectional view of the hollow metal inner tube of the present invention; Figure 11 This is a state diagram of the hanger of the present invention entering the powder separation device.

[0019] 1. Hanger body; 11. Hanging air inlet; 2. Outer tube; 21. Hollow metal inner tube; 22. H-shaped hollow metal tube kit; 3. T-shaped air guide groove; 31. Card slot; 32. First air guide hole; 4. Outer package; 41. Groove; 42. Cavity; 43. Second air guide hole; 5. Hanging needle; 6. Three-way connector; 7. Equipment casing; 8. Air blow pipe; 9. Gas generating device; 10; Recovery device; 11. Isolation plate; 12. Powder and gas separation device; 13. Dust recovery pipeline. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] The existing processes and solutions are basically centered around how to remove the coating from the surface of the rack. For the treatment of rack coating stripping, the following methods are generally adopted: 1. Chemical treatment: Generally, the plasticized part of the hanger is soaked in a plasticizer, and the coating swells and then falls off. The main component of the plasticizer is a flammable and volatile organic solvent, which not only has high cleaning costs and safety hazards, but also causes significant pollution to the environment.

[0022] 2. Burning: This is a common method used by spray coating plants. It is quick, convenient, and low-cost. After the coating is burned off, the surface is sandblasted to a clean, new finish. This method is practical and easy to use, but the simple, continuous burning process can pose significant environmental hazards. The combustion of powder coatings releases large amounts of CO2, CO, acetaldehyde, halides, and other harmful substances. These combustion products are absorbed by the human body, seriously affecting health. Emissions into the air also severely damage the surrounding environment. Therefore, this method should not be used.

[0023] 3. Low temperature freezing: After low temperature treatment by liquid nitrogen or other means, the surface is sandblasted or stripped by high pressure gas or high pressure liquid. This method has high application cost, complicated collection and treatment of stripping waste, and is not easy to promote.

[0024] 4. Manual treatment: Locally treating excess coating at the contact area between the hanger and the coated object, such as grinding off the coating with a grinding wheel or hammer, is difficult to remove completely, reduces the yield rate upon reuse, and carries serious safety risks, making it a temporary solution. Because existing measures do not address the source, reducing powder adhesion during the hanger coating process, combined with a simple, efficient, and low-cost hanger post-treatment equipment, can completely fill this technical gap.

[0025] 5. Pyrolysis furnace treatment: The hanger is treated in a pyrolysis furnace, an environmentally friendly device, at a temperature of 400°C, causing the coating to pulverize. The coating is then treated with a water jet. This technology also requires an environmental assessment and is accompanied by high energy consumption, making it an unsuitable environmentally friendly method.

[0026] 6. Metal Brush Coating Design: An insulating coating is applied to the metal brush to control the amount of powder applied. This method produces a very thin coating, resulting in a high rate of paint peeling after powder application (almost 100% failure). Once the coating breaks, re-coating is necessary, and the hanger requires repeated handling. This solution is completely unsuitable for commercial use and remains purely theoretical.

[0027] The starting point of existing processes is all about how to clean off the powder coating paint layer deposited on the hanger after the electrostatic powder spraying and curing process. At present, specific embodiments realize a solution without powder coating on the hanger.

[0028] The electrostatic spraying process requires that the workpiece be coated with sufficient powder and have a smooth surface. Therefore, in the powder spraying room, the product and the hanger will absorb a large amount of powder simultaneously and quickly.

[0029] The difficulty of existing processes on the market is that it is difficult to remove the powder adsorbed on the hanger while maintaining the adsorption capacity of the powder of the product to be processed.

[0030] After the product is solidified, the hanger is separated from the production line, the powder layer is separated from the hanger, and the hanger is hung back on the production line.

[0031] The hanger of this embodiment has the following features: 1. Reduce the powder adsorption capacity of the hanger: Insulating materials must be used and must be resistant to 200°C. At the same time, the hanger's electrical conductivity must be guaranteed. This solution uses fluoroplastic material, which has an ultra-low friction coefficient.

[0032] Maintaining electrical conductivity: The main body is made of fluoroplastic material. By modifying the components of the injection molding equipment and using the injection molding process, the conductive material is embedded and encapsulated during the injection molding process. The fluoroplastic injection molding process is implemented, and the conductive material is encapsulated in the middle of the main material of the hanger, ensuring conductivity while achieving seamlessness and reducing pre-treatment liquid and moisture residue during spraying.

[0033] 3. Design a hanger with an air-blowing structure. Using the low-resistance fluoroplastic material of the first item and the process improvement of the second item, the hanger is redesigned to achieve extremely low powder loading while having the ability to self-blowing powder removal.

[0034] 4. Eliminate powder residue on the hanger: After reducing most of the powder residue in the first step, the last residual powder is separated by the equipment and the ventilation setting of the hanger through this design to achieve dust-free hanger.

[0035] To achieve the above features and technical effects, this embodiment provides the following technical solutions: like Figures 1 to 4 As shown, a hanger includes a hanger body 1, an air inlet 11 is provided on the upper part of the hanger body 1, the hanger body 1 is composed of a hollow metal inner tube 21 and an H-shaped hollow metal tube sleeve 22 that is movably connected, an outer tube 2 is provided outside the hollow metal inner tube 21, the outer diameter of the H-shaped hollow metal tube sleeve 22 is adapted to the inner diameter of a cavity 42 provided inside a plurality of outer packaging parts 4, a groove 41 is provided on the outer upper part of the outer packaging part 4 to adapt to the T-shaped air guide groove 3; the air guide groove 3 also has a first air guide hole 32; second air guide holes 43 are provided at equal intervals on the groove 41; the air holes are aligned with the first air guide hole 32 and the second air guide hole 43 and then adapted, a plurality of outer packaging parts 4 are connected through a three-way joint 6 of the same material, and have the same structure, and a T-shaped air guide groove 3 is provided on the upper part.

[0036] The outer tube 2, the outer package 4 and the three-way connector 6 are made of fluorine-containing composite materials, including but not limited to PFA, FEP and ETPE; The main hollow metal inner tube 21 and the H-shaped hollow metal tube set 22 are made of conductive materials, and the conductive materials include but are not limited to iron wire, iron rod, steel bar and copper wire.

[0037] The outer tube 2 and the outer package 4 are integrally formed by inserting the hollow metal inner tube 21 containing conductive material and the H-shaped hollow metal tube set 22 in between through an injection molding process.

[0038] The hollow metal inner tube 21 is matched with the H-shaped hollow metal tube set 22 and the outer package 4 after machining. The H-shaped hollow metal tube set 22 is composed of multiple sections of metal tubes.

[0039] like Figure 5 As shown, the cross-section of the outer component 4 includes but is not limited to circular, elliptical, triangular, conical and teardrop shapes.

[0040] like Figure 9As shown, one end of the hollow metal inner tube 21 and outer tube 2 of the hanger body 1 is combined with the hanger body 1 in sequence and used in combination with each other up and down. The three-way joint 6 is replaced by a four-way joint, and a multi-layer and multi-shape design can be modularized according to needs.

[0041] like Figure 10 As shown, a method for manufacturing a hanger is shown, wherein the outer tube 2 and the outer package 4 are designed into a modular mold, and a corrosion-resistant and high-temperature resistant coating is added using an ordinary injection molding machine. The fluorine-containing composite material is heated to a molten state and injected into the mold corresponding to the hollow metal inner tube 21 containing a conductive material and the H-shaped hollow metal tube kit 22, and then cooled to form.

[0042] A method for manufacturing a hanger, wherein an outer tube 2 and an outer package 4 made of a fluorine-containing composite material are matched with a hollow metal inner tube 21 and an H-shaped hollow metal tube set 22 made of a machined conductive material.

[0043] like Figures 7 to 8 As shown, a powder separation device for the hanger includes a gas generator 9 and a powder-gas separation device 12. The gas generator 9 is connected to the upper part of the closed cavity formed by the isolation plate 11 through the blowing pipe 8, and then multiple groups of blowing pipes 8 are evenly distributed on the inner wall of the isolation plate 11. Multiple air holes are opened in the blowing pipe 8; a recovery device 10 is respectively provided on the upper left side and the lower right side of the closed cavity. The two groups of recovery devices 10 are connected with the dust recovery pipe 13 and then connected to the powder-gas separation device 12. The powder-gas separation device 12 forms a negative pressure. The gas generator 9 and the powder-gas separation device 12 allow the gas and dust to form mixed convection and then enter the recovery device 10.

[0044] Multiple hanger bodies 1 are lined up to enter the device, and the gas from the upper air blowing pipe 8 is blown in obliquely from top to bottom to blow away the external dust of the hanger body 1. At the same time, gas is blown into the air inlet 11. The gas passes through the hollow metal inner tube 22, the first air guide hole 32, the second air guide hole 43, and then passes through the T-shaped air guide groove 3 to blow the dust on the outer package 4 into the closed cavity, and then enters the recovery device 10 to achieve dust separation.

[0045] like Figure 11 As shown, the closed cavity formed by the isolation plate (11) is set according to different structures of the hanger, and can be square, rectangular, or various heterogeneous structures (depending on the structure of the hanger) without limitation.

[0046] Air inlet 11: The main function is to suspend the powder spraying chain and dock the air intake device; The hanger body 1 is made of fluoroplastic material, contains conductive material inside, and has air flow openings inside. Its main functions are support, conductivity and exhaust; the air guide groove: its main function is to guide and exhaust air, discharge the air flow in a certain direction, and blow and clean the dust on the hanger; the hanging needle 5 is for hanging products and hanging needles.

[0047] like Figure 5 The working principle of the hanger is that the external air supply system draws air from the air inlet 11, which then flows through an internal air guide device into the air guide groove C. The air guide groove is designed with a corresponding shape to guide the air in a certain direction and blow it toward the main body B.

[0048] The materials used are conductive materials such as iron and steel. The processing technology: the products undergo stamping, casting, welding and other processes.

[0049] Fluorinated composite materials include PFA, FEP, and ETPE. Material characteristics are as follows: ① The material has an extremely low coefficient of friction: A characteristic of fluoroplastics, the static coefficient of friction is typically between 0.08 and 0.2. The dynamic coefficient of friction is typically between 0.05 and 0.15. ② Strong Acid and Alkali Resistance: It resists corrosion from nearly all known strong acids (including boiling aqua regia and hydrofluoric acid), strong alkalis, and oxidizing agents (such as concentrated sulfuric acid, nitric acid, chromic acid, and hydrogen peroxide). ③ Solvent Resistance: It exhibits excellent resistance to most organic solvents (such as alcohols, ketones, esters, hydrocarbons, and chlorinated solvents) and inorganic solvents. ④ Halogen Resistance: It exhibits excellent resistance to chlorine, bromine, and other solvents (except molten alkali metals and fluorine gas). ⑤ Weather Resistance: It exhibits excellent resistance to UV rays, ozone, and atmospheric aging. ⑥ Self-lubrication: PFA is an excellent self-lubricating material, capable of operating in oil-free or low-lubrication conditions. ⑦ Low Starting Friction: A low static coefficient of friction means minimal starting resistance. ⑧ Relatively insensitive to temperature: Its friction coefficient does not change much in a wide temperature range (from deep cold to above 260°C) and remains low.

[0050] like Figure 6 As shown, the cross-section of the product shape of the main structure is a circular, elliptical, triangular, conical or other structures and shapes.

[0051] The cross section is evenly divided. Above the x-axis, the y value increases and the cross-section width becomes narrower; below the x-axis, the y value decreases and the cross-section width becomes narrower.

[0052] Explore the effect of external structure on powder removal experimental scheme (1) Experimental environment: Experimental tests were conducted under real production conditions, using a 20cm stick structure test with both new and traditional hangers. (2) Experimental variables: 1. Material: PFA45 steel 2. Cross-sectional shape: round water drop square 3. Placement: horizontal or vertical Experimental results 1. Powder adsorption capacity, waste weight (values ​​taken in each powder spraying cycle) 2. Cross-sectional structure of spraying waste 3. (For PFA, different shapes) Cavity formation cross section and size Experimental process 1. 2 PFA teardrop-shaped, circular, and square cross-sections, 2 each, and 2 45 steel teardrop-shaped, circular, and square cross-sections, totaling 12, 6 horizontally and 6 vertically on the same hanger, were used for a comparative experiment in an actual production environment. The powder weight was compared through 1, 2, and 3 powder spraying cycles. The horizontal phase structure was tested for multiple days and compared with the waste coating structure.

[0053] 2. Test Data

[0054] 3. Data Analysis

[0055] Result Analysis 1. Powder reduction ratio of vertical vs. horizontal: 36% (PFA), 12% (45 steel) Algorithm {1-(55.6+42.5+45.4) / (46.3+95.5+83.8)=36%} 2. PFA material compared to 45 steel powder: 73% (horizontally) and 80% (vertically) reduction algorithm {1-(46.3+95.5+83.3) / (191.4+307.9+336.8)=73%} 3. PFA teardrop-shaped cross section: circular cross section: square cross section = 1:2.06:1.8, the teardrop shape has the best effect (46.3:95.5:83.3) 4. The PFA teardrop-shaped solution reduces the ratio by 85% compared with the existing round steel powder (1-46.3 / 307.9=85%) 5. The average weight of 45 steel per circle (excluding the first circle) is 203g.

[0056] After the hanger and product pass through the powder spraying chamber, a large amount of powder on the hanger enters the equipment. The equipment will use an isolation plate to isolate the hanger and the product. The gas generator produces compressed air, which is transported through a pipeline to the device's blowing structure. The device then blows the powder from various positions on the hanger. Due to the specially designed hanger surface with an extremely low friction coefficient, the powder mixes with the compressed air to form a powder-gas mixture. The negative pressure generated by the device is recovered through a pipeline to the powder-gas separation device.

[0057] The working principle of the present invention is: (1) Modular hanger The main body of the hanger is made of conductive rigid material to ensure its conductivity and support. The traditional welding method is eliminated and a segmented structure is adopted to assemble the hanger structure for different products through coaxial, cross, special-shaped and other connectors. The structural connectors are made of metal to ensure conductivity. The modular hanger can meet different spray production needs.

[0058] (2) The main body of the hanger is coated with PFA composite material The surface is roughened and the injection molding machine is modified so that it can be used to overmold the segmented body with PFA composite material and ensure the stable bonding of the overmold structure. PFA composite material has extremely high chemical stability and is almost not corroded by any chemical substances. It is temperature-resistant from -80℃ to 260℃ and also has good friction reduction, self-lubrication, excellent electrical insulation properties, aging resistance, weather resistance, and is non-toxic. The coaxial, cross, and special-shaped connection methods mentioned in description (1) are covered with PFA composite material.

[0059] (3) Elliptical conical structure The segmented main structure of the hanger is designed to have an elliptical conical structure in its vertical cross-section. Thanks to the good self-lubrication and excellent electrical insulation properties of the PFA composite material, the powder slides down under its own weight. Compared with conventional hangers, the powder adhesion amount is reduced to 15% to 30% under existing process conditions.

[0060] (4) Change the coating bonding method The coating method formed by the above (1) (2) (3) processes is a mechanical bond formed by the original process (the metal surface usually has microscopic unevenness. After the spray coating is applied, it will flow into these tiny grooves and pores. After drying and solidification, it is embedded in the microstructure of the metal surface like a "wedge", replacing the mechanical bite with a hollow isolation structure, so that the coating and the hanger are not bonded.

[0061] (5) The hanger is vertically suspended on the hanging structure of the self-propelled chain. The chain feeds the hanger to the paint stripping bin by itself. The reciprocating hydraulic paint stripping equipment crushes the coating by physical impact without damaging the surface of the hanger. During the crushing process, the hanger is driven by a motor to perform X, Y, and Z three-axis motion (motor drive, robotic arm, hydraulic lift can achieve this, and the specific adjustment is being made according to the design). The coating waste falls and is crushed by the crushing device and then enters the recycling bin.

[0062] The hanger body is made of a cylindrical metal rod with a diameter of 14MM, a tensile strength of 500MPa, and a length of 5cm to 60cm. The surface is roughened and an L-shaped structure is formed by turning 15mm at both ends. The hanger is positioned by a mold and overmolded using a modified special injection molding machine.

[0063] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A hanger, comprising a hanger body (1), characterized in that: The hanger body (1) is provided with an air inlet (11) at the upper part. The hanger body (1) is composed of a hollow metal inner tube (21) and an H-shaped hollow metal tube set (22) that is movably connected. An outer tube (2) is provided outside the hollow metal inner tube (21). The outer diameter of the H-shaped hollow metal tube set (22) is adapted to the inner diameter of a cavity (42) provided inside a plurality of outer packaging parts (4). A groove (41) is provided on the outer upper part of the outer packaging part (4) to adapt to the T-shaped air guide groove (3); the air guide groove (3) is also provided with a first air guide hole (32); second air guide holes (43) are provided on the groove (41) at equal intervals; the air holes are aligned with the first air guide hole (32) and the second air guide hole (43) and then adapted. The plurality of outer packaging parts (4) are connected through a three-way joint (6) made of the same material and have the same structure, and a T-shaped air guide groove (3) is provided on the upper part.

2. A hanger according to claim 1, characterized in that: The outer tube (2), the outer casing (4) and the three-way joint (6) are made of fluorine-containing composite materials including but not limited to PFA, FEP and ETPE; The main hollow metal inner tube (21) and the H-shaped hollow metal tube set (22) are made of conductive materials, and the conductive materials include but are not limited to iron wire, iron rod, steel bar and copper wire.

3. The hanger according to claim 1, characterized in that: The outer tube (2) and the outer package (4) are integrally formed by inlaying the hollow metal inner tube (21) containing the conductive material and the H-shaped hollow metal tube set (22) in the middle through an injection molding process.

4. The hanger according to claim 1, characterized in that: The hollow metal inner tube (21), the H-shaped hollow metal tube set (22), and the outer package (4) are matched after machining, and the H-shaped hollow metal tube set (22) is composed of multiple sections of metal tubes.

5. The hanger according to claim 3, characterized in that: The cross-section of the outer package (4) includes but is not limited to circular, elliptical, triangular, conical and teardrop-shaped.

6. The hanger according to claim 1, characterized in that: One end of the combined hollow metal inner tube (21) and outer tube (2) of the hanger body (1) is used in combination with the hanger body (1) arranged up and down, and the three-way joint (6) is replaced by a four-way joint, and a multi-layer and multi-shape design is modularized according to needs.

7. The method for making a hanger according to claim 1, characterized in that: The outer tube (2) and the outer package (4) are molded by modular design, and a corrosion-resistant and high-temperature-resistant coating is added using a common injection molding machine. The fluorine-containing composite material is heated to a molten state and injected into the mold corresponding to the hollow metal inner tube (21) containing the conductive material and the H-shaped hollow metal tube kit (22), and then cooled and formed.

8. The method for making a hanger according to claim 7, characterized in that: The outer tube (2) and outer package (4) of the fluorine-containing composite material are compatible with the hollow metal inner tube (21) and H-shaped hollow metal tube set (22) made of a machined conductive material.

9. A powder separation device for the hanger according to claim 1, characterized in that: The invention comprises a gas generator (9) and a powder-gas separation device (12), wherein the gas generator (9) is connected to the upper part of a closed cavity formed by an isolation plate (11) through an air blowing pipe (8), and then a plurality of air blowing pipes (8) are evenly distributed on the inner wall of the isolation plate (11), and a plurality of air holes are provided in the air blowing pipe (8); a recovery device (10) is provided on the upper left side and the lower right side of the closed cavity respectively, and the two recovery devices (10) are connected to the powder-gas separation device (12) after being connected to the dust recovery pipe (13), and the powder-gas separation device (12) forms a negative pressure, and the gas generator (9) and the powder-gas separation device (12) form a mixed convection of gas and dust, and then enter the recovery device (10).

10. The operating method of the powder separation device according to claim 9, characterized in that: A plurality of the hanger bodies (1) are arranged to enter the device, and the gas from the upper air blowing pipe (8) is blown in from the top to the bottom to blow away the external dust of the hanger body (1). At the same time, the gas is blown into the air inlet (11), and the gas passes through the hollow metal inner tube (22), the first air guide hole (32), the second air guide hole (43), and then passes through the T-shaped air guide groove (3) to blow the dust of the outer package (4) into the closed cavity, and then enters the recovery device (10), thereby achieving dust separation.

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