Continuous coating equipment

Abstract

The utility model relates to the field of powder material coating equipment, and provides continuous coating equipment which comprises a feeding system, a horizontal furnace body, transmission devices and an electrical control system, the feeding system is arranged at one end of the furnace body, and the transmission devices are arranged at the two ends of the furnace body and used for driving a furnace tube in the furnace body to rotate. The electrical control system is used for controlling the operation of the whole equipment, the furnace body is a multi-section furnace body and comprises a heating section and a cooling section, and the cooling section is arranged at the tail part of the heating section. The automatic knocking device is adopted to knock the feeding end of the furnace body, adhesion of powder to the inner wall of the furnace body is reduced, the ceramic chain is arranged on the inner wall of the furnace body to scatter blocky powder, and the coating effect on powder materials is improved; the powder material is continuously coated by the multi-section furnace body, so that the productivity is improved, and continuous automatic feeding and continuous production can be realized; the problem of low mass production efficiency in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of powder material coating equipment, in particular to a continuous coating equipment. Background Art

[0002] The coated powder, also known as the composite type powder, is a multi-layer coating structure composed of one or more substances. The powder core and the outer coating are two different materials, and there is an interaction force between the core and the layer. There is an isolation layer between the powder core and the outer ring, and the powder core is also protected. The powder coating method uses a circulating fast fluidized bed reactor to prepare the coated powder; the powder coating method can avoid the unevenness in the powder premixing process.

[0003] At present, the existing methods have low production capacity and long feeding cycle during the preparation process, resulting in low production efficiency; the powder is easy to accumulate and form lumps in the fluidized bed, resulting in uneven coating and poor coating effect; in addition, the powder is easy to adhere to the inner wall of the furnace body at the feeding end, affecting the coating quality. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above deficiencies of the prior art, and provide a continuous coating equipment that is convenient for mass production, has high production capacity and efficiency, can continuously and automatically feed materials, continuously produce, can reduce the accumulation and lumping of powder in the furnace body, reduce the adhesion of powder at the feeding end to the inner wall, and improve the coating effect and uniformity of the powder material.

[0005] The technical solution of the utility model is: a continuous coating equipment, including a feeding system, a horizontal furnace body, a transmission device and an electrical control system. The feeding system is arranged at one end of the furnace body. Transmission devices are provided at both ends of the furnace body to drive the furnace tube in the furnace body to rotate. The electrical control system is used to control the operation of the entire equipment. The furnace body is a multi-section furnace body, including a heating section and a cooling section. The cooling section is arranged at the tail of the heating section.

[0006] Preferably, several independent heating sections are arranged in the heating section of the furnace body. Each independent heating section is provided with a heating device independently controlled by the electrical control system. The heating device uses resistance wires for heating. The resistance wires are distributed in a ring around the furnace tube, and heat insulation cotton is provided. A heating section shield is arranged on the furnace body.

[0007] Furthermore, an automatic knocking device is arranged at the feeding end of the furnace body. The furnace tube is lined with graphite or ceramic; several ceramic chains are arranged on the inner wall of the furnace tube. Preferably, the automatic knocking device includes a driving motor, an eccentric wheel and a knocking hammer. The driving motor is connected to the eccentric wheel through a driving shaft. The knocking hammer is installed on the eccentric wheel and is used to knock the furnace tube to prevent the powder from adhering to the inner wall of the furnace body; the lining of the furnace tube with graphite or ceramic can further reduce the powder sticking to the wall. The setting of the ceramic chains can strike the lumps of accumulated powder while the furnace tube rotates, playing a role in dispersing.

[0008] Furthermore, the length of the heating section of the furnace body is 2 - 7.5 m, the wall thickness is 8 - 15 mm, and a heat-insulating layer made of fiber lightweight material is provided on the furnace body; the length of the cooling section of the furnace body is 1 - 5 m, and the wall thickness is 5 - 12 mm.

[0009] Furthermore, the top of the furnace body adopts a multi-section integral combined block structure, and the gaps between the integral combined blocks of each section of the furnace top are filled and sealed with aluminum silicate fiber blankets.

[0010] Furthermore, an outlet sealing cover is provided at the tail of the furnace body, a spray water cooling system is arranged between the heating section and the outlet sealing cover, and double-row spray water cooling pipes are provided to cool the furnace pipes in the cooling section by water cooling; the spray water cooling system includes a water collection tank and a circulation pump, and the cooling water is recycled; a circulating cooling water replenishment interface is provided on the water collection tank to replenish the evaporated water; the spray water cooling system also includes a water vapor collection cover, and the collection cover is provided with a water vapor extraction and discharge interface, and a docking flange is configured for connecting the exhaust pipe to the extraction cover to discharge the water vapor generated by the water-cooled furnace pipes outdoors.

[0011] Furthermore, the feeding system includes a feeding hopper, a transition bin, and a screw feeder. The feeding hopper is arranged on a support, the transition bin is arranged at the lower end of the feeding hopper, the outlet of the transition bin is connected to the screw feeder, and the outlet of the screw feeder is connected to the furnace body through an inlet sealing structure.

[0012] Furthermore, the transmission device includes a speed-regulating motor and a sprocket. The reduction motor is arranged on a frame, a gear pair is provided on the furnace pipe, the reduction motor is connected to a reducer through a driving shaft, the reducer is connected to the gear pair through a sprocket, and a speed regulator is provided on the reducer to control the rotation speed of the furnace pipe.

[0013] Furthermore, the furnace pipes are supported by supporting rollers arranged on both sides of the furnace body, and matching supporting rolling discs are provided on the furnace pipes; two sets of supporting rollers are respectively arranged at the front and back of the furnace body, and the supporting rollers can be adjusted in the radial direction of the furnace pipes to ensure the concentricity of the furnace pipes and the furnace chamber; positioning wheel structures that rotate with the furnace pipes are provided on both sides of the supporting rolling disc at the inlet end of the furnace pipes to position the rotation of the furnace pipes, and a protection limiting structure is also provided at the outer side position of the positioning wheels.

[0014] Furthermore, the inlet and outlet sealing covers include graphite sealing rings and spring-type automatic pressing and sealing devices arranged on the frame. The end face sealing method is adopted. The pressing and sealing device presses and seals the end of the furnace pipe with the graphite sealing ring, and an expansion compensation ring is provided to compensate for the position misalignment of the sealing ring caused by thermal expansion and movement. A secondary air ring seal is provided at the dynamic sealing part.

[0015] Furthermore, the electrical control system includes a PLC programmable controller, an electric control unit, and a temperature control unit; the electric control unit includes buttons, contactors, and circuit breakers for controlling the operation of the transmission part;

[0016] The temperature control unit includes a closed-loop automatic control system composed of an intelligent temperature control instrument, an on-line automatic temperature measurement thermocouple, and an automatic power adjustment device to automatically heat and control the temperature of the furnace tube;

[0017] The automatic control system realizes the automatic operation control, operation status monitoring, operation status simulation display, operation fault alarm indication, and oxygen content monitoring and alarm at the inlet and outlet of the whole equipment through a PLC programmable controller and a touch screen configuration interface.

[0018] The utility model has the following characteristics:

[0019] 1. An automatic knocking device is used to knock the feeding end of the furnace body, reducing the adhesion of powder on the inner wall of the furnace body, and a ceramic chain is arranged on the inner wall of the furnace body to disperse the lumped powder, improving the coating effect on the powder material.

[0020] 2. The powder material is continuously coated through a multi-section furnace body, improving the production capacity, enabling continuous automatic feeding and continuous production; solving the problem of low mass production efficiency in the prior art.

[0021] 3. The utility model is provided with multiple independently controlled independent heating sections, facilitating process adjustment; and can realize automatic feeding and discharging, adopting a transition structure of a transition chamber, which can effectively isolate the entry of oxygen in the air into the furnace tube.

[0022] The following further describes the detailed structure of the utility model in conjunction with the drawings and specific embodiments. Description of the Drawings

[0023] Figure 1 - is the structural schematic diagram of the utility model;

[0024] Figure 2 - is the structural schematic diagram of the feeding system;

[0025] Figure 3 - is the structural schematic diagram of the heating section;

[0026] Figure 4 - is the structural schematic diagram of the cooling section;

[0027] 1- bracket, 2- transition bin, 3- feed hopper, 4- feed motor, 5- screw feeder, 6- frame, 7- automatic knocking device, 8- heating section, 9- heating device, 10- furnace body docking insulation, 11- furnace body, 12- water collecting tank, 13- cooling section, 14- discharge bin, 15- feed trolley, 16- import sealing structure, 17- feed flange, 18- screw feeder discharge port, 19- furnace tube end, 20- expansion compensation ring, 21- graphite sealing ring, 22- compression sealing device, 23- bearing, 24- insulation cotton, 25- heavy brick, 26- support roller, 27- resistance wire, 28- silicon carbide plate, 29- ceiling insulation cotton, 30- ceramics, 31- furnace tube, 32- heating section shield, 33- export sealing structure. DETAILED DESCRIPTION

[0028] As shown in the accompanying drawings: a continuous coating device, including a feeding system, a horizontal furnace body 11, a transmission device and an electrical control system. The feeding system is arranged at one end of the furnace body 11, and transmission devices are provided at both ends of the furnace body 11 to drive the furnace tube 31 in the furnace body 11 to rotate. The electrical control system is used to control the operation of the entire equipment. The furnace body 11 is a multi-section furnace body 11, including a heating section 8 and a cooling section 13. The cooling section 13 is arranged at the tail of the heating section 8, and the cooling section 13 is provided with a discharge bin 14 through an outlet sealing structure 33. In the embodiment, the feeding system includes a feeding hopper 3, a transition bin 2 and a screw feeder 5. The feeding hopper 3 is arranged on a bracket 1, the transition bin 2 is arranged at the lower end of the feeding hopper 3, the outlet of the transition bin 2 is connected to the screw feeder 5, the screw feeder 5 is installed on the feeding trolley 15 through a bearing 23, and is driven by a feeding motor 4, the feeding trolley 15 is installed and fixed on a frame 6, and the outlet of the screw feeder 5 is connected to the furnace body 11 through an inlet sealing structure 16; a vacuum pipe is provided on the transition bin 2, and vacuum isolation valves are provided at the upper and lower ends of the transition bin 2, which can effectively isolate oxygen in the air from entering the furnace tube 31; before coating, the furnace tube 31 and the screw feeder 5 are first vacuumed, and an inert protective gas is introduced to reduce the influence of air on the coating.

[0029] An automatic knocking device 7 is provided at the feeding end of the furnace body 11, and the furnace tube 31 is lined with graphite or ceramic 30; a plurality of ceramic 30 chains are arranged on the inner wall of the furnace tube 31. Preferably, the automatic knocking device 7 comprises a driving motor, an eccentric wheel and a knocking hammer, the driving motor is connected to the eccentric wheel through a driving shaft, and the knocking hammer is installed on the eccentric wheel, and is used to knock the furnace tube 31 to prevent the powder from adhering to the inner wall of the furnace body 11; the graphite or ceramic 30 lined furnace tube 31 can further reduce the powder from adhering to the wall, and ensure that the treated material is not contaminated by metal impurities, and the metal impurities can be controlled within 30ppm; the arrangement of the ceramic 30 chain can hit the accumulated blocks of powder while the furnace tube 31 rotates, so as to play a role of breaking up.

[0030] In an embodiment, the furnace body 11 is installed on the frame 6. The frame 6 is mainly welded by section steel and steel plates, and plays a role in installing, supporting and fixing the furnace body 11 and the transmission device. A support chassis for the furnace body 11 is provided at the bottom of the frame 6. The chassis has an inclination angle, keeping the furnace tubes 31 at an adjustable inclination angle of 0.5°-10° with the horizontal plane, facilitating the flow and operation of materials. In this embodiment, the furnace tubes 31 are at an inclination angle of 3° with the horizontal plane.

[0031] Preferably, the length of the heating section 8 of the furnace body 11 is 2-7.5 m, and the wall thickness is 8-15 mm. A heat-insulating layer with a fiber lightweight material structure is provided on the furnace body 11; preferably, the length of the heating section 8 of the furnace body 11 is 5.5 m, and the wall thickness is 10 mm.

[0032] The furnace tubes 31 in the heating section 8 of the furnace body 11 are made of high-nickel stainless steel materials with high strength, high temperature resistance and corrosion resistance, such as heat-resistant steel SUS-313s or Cr20Ni80 alloy steel stainless steel materials. The maximum temperature can reach 1200 °C. The butt welds of the furnace tubes 31 are sealed by a high-power automatic submerged arc welding machine, and the welds are inspected for flaws to ensure the reliable strength of the furnace tube 31 welds and no internal defects. Preferably, several independent heating sections 8 are provided in the heating section 8 of the furnace body 11. Each independent heating section 8 is provided with a heating device 9 independently controlled by an electrical control system. The heating device 9 is heated by a resistance wire 27. The resistance wire 27 is distributed in a ring around the furnace tubes 31, and heat-insulating cotton 24 is provided. A heating section shield 32 is provided on the furnace body 11. Ceiling heat-insulating cotton 29 is provided inside the shield. Heavy bricks 25 are provided at the bottom of the heating device 9 to play a role in heat insulation. A silicon carbide plate 28 is provided on the lower side of the heating device 9 close to the furnace tubes 31, facilitating the uniform heating of the furnace tubes 31 and playing a role in heat conduction and insulation; more preferably, in this embodiment, five independent heating sections 8 are provided, respectively controlled by the electrical control system. The top of the heating section 8 of the furnace body 11 adopts a multi-section integral combined block structure. The gaps between the integral combined blocks of each section of the furnace top are filled and sealed with a silica-aluminum fiber blanket; in addition, one or two sections can be added to the heating section 8 of the furnace body 11 according to the needs of use. A furnace body butt joint heat insulation 10 is provided at the connection of two adjacent heating sections 8. At the same time, a furnace body butt joint heat insulation 10 is also provided at the connection of the heating section 8 and the cooling section 13 to ensure the covering effect.

[0033] The length of the cooling section 13 of the furnace body 11 is 1-5 m, and the wall thickness is 5-12 mm; preferably, the length of the cooling section 13 of the furnace body 11 is about 3 m, and the wall thickness of the furnace tubes 31 is 8 mm. The furnace tubes 31 in the spray cooling section 13 are made of SUS304 material with excellent corrosion resistance and lined with graphite or ceramics 30. Multiple ceramic 30 chains are also provided on the inner wall of the furnace tubes 31, with uniform cloth and good dispersion; maximizing the utilization efficiency of the furnace chamber and improving production capacity.

[0034] At the tail of the cooling section 13 of the furnace body 11, there is an outlet sealing cover. A spray water cooling system is provided on the cooling section 13 of the furnace body 11 and is located between the heating section 8 and the outlet sealing cover. Double-row spray water cooling pipes are provided to cool the furnace tubes 31 of the cooling section 13 by water cooling; the spray water cooling system includes a water collection tank 12 and a circulation pump, and the cooling water is recycled; the water collection tank 12 is arranged on the top of the furnace body 11, and the water collection tank 12 is provided with a circulating cooling water replenishment interface to replenish the evaporated water; the spray water cooling system also includes a water vapor collection cover, and the collection cover is provided with a water vapor extraction and discharge interface, and a docking flange is configured for connecting the exhaust pipe to the extraction hood to discharge the water vapor generated by the water-cooled furnace tubes 31 outdoors.

[0035] In the embodiment, the transmission device includes a speed-regulating motor and a sprocket. The speed-reducing motor is arranged on the frame 6. Corresponding gear pairs are provided on the furnace tubes 31. The speed-reducing motor is connected to the speed reducer through a drive shaft, the speed reducer is connected to the gear pair through a sprocket, and a speed regulator for controlling the rotation speed of the furnace tubes 31 is provided on the speed reducer. Preferably, the furnace tubes 31 are supported by supporting rollers 26 arranged on both sides of the furnace body 11. The supporting rollers 26 are installed and fixed on the frame 6, and matching supporting rolling discs are provided on the furnace tubes 31; two sets of supporting rollers 26 are respectively arranged at the front and rear of the furnace body 11, and the supporting rollers 26 can be adjusted in the radial direction of the furnace tubes 31 to ensure that the furnace tubes 31 are concentric with the furnace chamber; positioning wheel structures that rotate with the furnace tubes 31 are provided on both sides of the supporting rolling disc at the inlet end of the furnace tubes 31 to position the rotation of the furnace tubes 31, and a protection limit structure is also provided at the outer side position of the positioning wheels.

[0036] In the embodiment, the inlet and outlet sealing covers include a graphite sealing ring 21 and a spring-type automatic pressing sealing device 22 arranged on the frame 6. The end face sealing method is adopted. The pressing sealing device 22 presses and seals the end of the furnace tube with the graphite sealing ring 21, and an expansion compensation ring 20 is provided to compensate for the misalignment of the sealing ring position caused by thermal expansion and movement. A secondary air ring seal is provided at the dynamic seal. Preferably, a feed flange 17 is provided on the screw feeder 5, and the feed flange 17 is tightly connected to the inlet sealing cover. The discharge port 18 of the screw feeder extends into the furnace tube 31 to prevent the material from accumulating at the inlet.

[0037] In the embodiment, the electrical control system includes a PLC programmable controller, an electrical control unit, and a temperature control unit; the electrical control unit includes buttons, contactors, and circuit breakers for controlling the operation of the transmission part;

[0038] The temperature control unit includes a closed-loop automatic control system composed of an intelligent temperature control instrument, an on-line automatic temperature measurement thermocouple, and an automatic power regulation device to automatically heat and control the temperature of the furnace tubes 31;

[0039] The automatic control system realizes the automatic operation control, operation status monitoring, operation status simulation display, operation fault alarm indication and oxygen content monitoring and alarm at the feeding and discharging ports of the whole equipment through the PLC programmable controller and the touch screen configuration interface.

[0040] The utility model adopts an automatic knocking device 7 to knock the feeding end of the furnace body 11, reduces the adhesion of powder on the inner wall of the furnace body 11, and arranges a ceramic 30 chain on the inner wall of the furnace body 11 to disperse the agglomerated powder, improving the coating effect on the powder material; the powder material is continuously coated through the multi-section furnace body 11, improving the production capacity, enabling continuous automatic feeding and continuous production; solving the problem of low mass production efficiency in the prior art; the utility model is provided with a plurality of independently controlled independent heating sections 8, facilitating process adjustment; and can realize automatic feeding and discharging, adopting a transition structure of a transition chamber, which can effectively isolate the entry of oxygen in the air into the furnace tube 31.

[0041] The above is the preferred embodiment of the utility model and the technical principles applied. For those skilled in the art, any obvious changes such as equivalent transformation and simple replacement based on the technical solution of the utility model without departing from the spirit and scope of the utility model shall fall within the protection scope of the utility model.

Claims

1. A continuous coating device, comprising a feeding system, a horizontal furnace body, a transmission device and an electrical control system. The feeding system is arranged at one end of the furnace body. Transmission devices are provided at both ends of the furnace body for driving the furnace tubes in the furnace body to rotate. The electrical control system is used to control the operation of the entire device, and is characterized in that: The furnace body is a multi-section furnace body, including a heating section and a cooling section, and the cooling section is arranged at the tail of the heating section.

2. The continuous coating equipment according to claim 1, characterized in that: An automatic knocking device is provided at the feeding end of the furnace body, and the furnace tube is lined with graphite or ceramic; several ceramic chains are arranged on the inner wall of the furnace tube.

3. The continuous coating device according to claim 2, wherein: The length of the heating section of the furnace body is 2 - 7.5 m, the wall thickness is 8 - 15 mm, and a heat-insulating layer with a fiber lightweight material structure is provided on the furnace body; the length of the cooling section of the furnace body is 1 - 5 m, and the wall thickness is 5 - 12 mm.

4. The continuous coating device according to claim 2, wherein: The top of the furnace body adopts a multi-section integral combined block structure, and the gaps between the integral combined blocks of each section of the furnace top are filled and sealed with aluminosilicate fiber blankets.

5. The continuous coating device according to claim 1, wherein: An outlet sealing cover is provided at the tail of the furnace body, a spray water cooling system is arranged between the heating section and the outlet sealing cover, and a double-row spray water cooling pipeline is provided to cool the furnace tube of the cooling section by water cooling; the spray water cooling system includes a water collecting tank and a circulating pump, and the cooling water is recycled; a circulating cooling water replenishment interface is provided on the water collecting tank to replenish the evaporated water; the spray water cooling system also includes a water vapor collecting cover, and the collecting cover is provided with a water vapor extraction and discharge interface, and a docking flange is configured for connecting the exhaust pipeline and the extraction hood to discharge the water vapor generated by the water-cooled furnace tube outdoors.

6. The continuous coating equipment according to claim 1, characterized in that: The feeding system includes a feeding hopper, a transition bin and a screw feeder. The feeding hopper is arranged on a support, the transition bin is arranged at the lower end of the feeding hopper, the outlet of the transition bin is connected to the screw feeder, and the outlet of the screw feeder is connected to the furnace body through an inlet sealing structure.

7. The continuous coating device according to claim 1, characterized in that: The transmission device includes a speed-regulating motor and a sprocket. The reduction motor is arranged on a frame, a gear pair is provided on the furnace tube, the reduction motor is connected to a reducer through a drive shaft, the reducer is connected to the gear pair through a sprocket, and a speed regulator is provided on the reducer to control the rotation speed of the furnace tube.

8. The continuous coating device according to claim 1, characterized in that: The furnace tube is supported by supporting rollers arranged on both sides of the furnace body, and a matching supporting rolling disc is provided on the furnace tube; two sets of supporting rollers are respectively arranged at the front and back of the furnace body, and the supporting rollers can be adjusted in the radial direction of the furnace tube to ensure that the furnace tube is concentric with the furnace chamber; positioning wheel structures that rotate with the furnace tube are provided on both sides of the supporting rolling disc at the inlet end of the furnace tube to position the rotation of the furnace tube, and a protection limit structure is also provided at the outer side position of the positioning wheel.

9. The continuous coating device according to claim 1, characterized in that: The inlet and outlet sealing covers include graphite sealing rings and spring-type automatic pressing sealing devices arranged on the frame, adopt an end face sealing method, the pressing sealing device presses and seals the end of the furnace tube with the graphite sealing ring, and an expansion compensation ring is provided to compensate for the misalignment of the sealing ring position caused by thermal expansion and movement, and a secondary air ring seal is provided at the dynamic seal.

10. The continuous coating device according to any one of claims 1-9, characterized in that: The electrical control system includes a PLC programmable controller, an electric control unit and a temperature control unit; the electric control unit includes buttons, contactors and circuit breakers for controlling the operation of the transmission part. The temperature control unit includes an intelligent temperature control instrument, an on-line automatic temperature measuring thermocouple and an automatic power regulating device to form a closed-loop automatic control system for automatically heating and controlling the temperature of the furnace tube. The automatic control system realizes the automatic operation control, operation status monitoring, operation status simulation display, operation fault alarm indication and oxygen content monitoring and alarm at the feeding and discharging ports of the whole equipment through the PLC programmable controller and the touch screen configuration interface.

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