A reverse hot air circulation system for an enamelled wire baking oven

Abstract

The present application provides a reverse hot air circulation system for an enamelled wire baking furnace, which relates to the technical field of enamelling machines. A reverse hot air circulation system for an enamelled wire baking furnace includes a baking mechanism, and an oven is built in the baking mechanism. An air inlet chamber is coaxially connected to the discharge end of the oven, and an air outlet chamber is coaxially connected to the feeding end of the oven. A flow equalizing component is coaxially and rotatably arranged inside the air inlet chamber. A countercurrent component is arranged on the side of the air inlet chamber facing the furnace chamber. The countercurrent component includes air outlet nozzles evenly arranged circumferentially. The angle of the air outlet section of the air outlet nozzle is adjustable. An adjusting ring is coaxially arranged inside the air inlet chamber. The adjusting ring is hinged to a plurality of the air outlet nozzles. The adjusting ring can axially displace inside the air inlet chamber. The hot air flow is evenly distributed inside the air inlet chamber, improving the thermal energy utilization rate while making the temperature of the entire cross-section inside the furnace chamber balanced. The air outlet nozzles make the hot air flow form a countercurrent with the enamelled wire running inside the furnace chamber, improving the heat conduction efficiency.

Description

Technical Field

[0001] This application relates to the technical field of enameling machines, and more specifically, to a reverse hot air circulation system for an enamelled wire oven. Background Art

[0002] During the use of existing enamelled wire ovens, the enamelled wire runs axially inside the oven at a certain speed, and the oven internally heats the enamelled wire. The treatment of the heat source adopts active heating and combustion of a large amount of harmful gases contained in the organic solvent vapors evaporated during the baking of the paint film. The combustion heat energy is circulated to the furnace body by the circulating air to recycle the heat energy.

[0003] However, most existing baking ovens simply convey the air flow containing heat energy into the baking oven. The running direction and flow path of the air flow inside the baking oven have a great impact on the stability of the local temperature of the baking oven, causing certain difficulties in controlling the temperature of the entire baking oven. At the same time, the utilization rate of heat energy is relatively low. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application proposes a reverse hot air circulation system for an enamelled wire oven, including a baking mechanism and an exhaust gas catalytic combustion device. The baking mechanism has an oven built-in, a heating element is arranged inside the oven, an air flow circulation component is connected to the oven, and the air flow circulation component is connected to the exhaust gas catalytic combustion device and conveys the hot gas generated after combustion into the interior of the oven. The oven is arranged in a double-layer structure, and the heating element is located between the two layers; the discharge end of the oven is coaxially connected to an intake chamber, the feed end of the oven is coaxially connected to an exhaust chamber, and the intake chamber and the exhaust chamber are respectively connected to the air flow circulation component; a flow equalizing component is coaxially rotatably arranged inside the intake chamber, and a plurality of arc-shaped channels are arranged inside the flow equalizing component, and the arc-shaped channels change the direction of the air flow; the inner diameter of the intake chamber is smaller than the inner diameter of the oven; the inner and outer diameters of the exhaust chamber are the same as the inner and outer diameters of the intake chamber; a countercurrent component is arranged on the side of the intake chamber facing the furnace chamber, and the countercurrent component includes air outlet nozzles evenly arranged circumferentially. The air outlet nozzles are connected to the side of the intake chamber facing the furnace chamber, and the angle of the air outlet section of the air outlet nozzles is adjustable. An adjusting ring is coaxially arranged inside the intake chamber, the adjusting ring is hinged to a plurality of the air outlet nozzles, and the adjusting ring can axially displace inside the intake chamber.

[0005] Preferably, both ends of the baking mechanism along the axial direction of the oven are inlet and outlet ends, and rectangular channels for the cable to pass through are arranged on the inlet and outlet ends, and a support plate is fixedly connected to the lower side of the rectangular channels.

[0006] Preferably, the inner layer of the oven is an inner chamber, and a cavity for placing the heating element is left between the inner chamber and the oven.

[0007] Preferably, the air inlet chamber includes an air inlet housing and a blocking ring. An annular cavity is formed inside the blocking ring and the air inlet housing. A plurality of air outlet holes are circumferentially and uniformly arranged on one side of the blocking ring facing the furnace chamber. The plurality of air outlet holes correspond to and are hermetically connected to the plurality of air outlet nozzles one by one.

[0008] Preferably, the air outlet chamber includes an air outlet housing and a plurality of blocking blocks. An annular cavity is arranged inside the air outlet housing. The plurality of blocking blocks are axially and uniformly arranged in the annular cavity; the blocking blocks are rectangularly arranged, and the outer sides of the blocking blocks in the radial direction do not abut against the inner wall of the air outlet housing; a variable-diameter air passage is formed between two adjacent blocking blocks.

[0009] Preferably, the air flow circulation assembly includes at least one air supply member and at least one air outlet member. The air supply member is tangentially connected to the air inlet chamber and is arranged along the tangential direction of the air inlet chamber. The air outlet member is connected to the air outlet chamber and is arranged along the tangential direction of the air outlet chamber.

[0010] Preferably, the flow equalizing assembly includes an upper end portion, a lower end portion, and a plurality of arc-shaped partition plates. The upper end portion is rotatably arranged in the annular cavity between the air inlet housing and the blocking ring. The upper end portion faces the side of the air outlet holes in the annular cavity. One side of the upper end portion away from the air outlet holes is arc-shaped and protrudes outward; the lower end portion is rotatably arranged in the annular cavity between the air inlet housing and the blocking ring. The lower end portion is on the side away from the air outlet holes in the annular cavity. One side of the lower end portion facing the upper end portion is arc-shaped and is similar to that of the upper end portion and is concave inward; the plurality of arc-shaped partition plates are circumferentially and fixedly connected between the upper end portion and the lower end portion; the plurality of arc-shaped partition plates isolate a plurality of arc-shaped channels between the upper end portion and the lower end portion, and the arc-shaped channels are arc-shaped air passages.

[0011] Preferably, the air outlet nozzle includes a positioning seat, a connecting cylinder, a limiting plate, a spherical connecting member, and an air outlet cylinder. The positioning seat is hermetically inserted into the air outlet hole; the connecting cylinder is hermetically connected to the positioning seat; the limiting plate is fixedly connected to one end of the positioning seat located inside the air outlet hole; the spherical connecting member is rotatably connected to one end of the connecting cylinder away from the positioning seat, and the spherical connecting member is connected to the connecting cylinder; the air outlet cylinder is fixedly connected to the spherical connecting member, and the air outlet cylinder extends out of the connecting cylinder.

[0012] Preferably, at least two support rods are symmetrically and fixedly connected to the end surface of the adjusting ring. The two support rods sequentially slide out of the baking furnace and the baking mechanism. One end of the support rod located outside the baking mechanism is fixedly connected with a telescopic member along the axial direction. The telescopic end of the telescopic member is fixedly connected to the support rod, and the telescopic member is fixedly connected to the baking mechanism.

[0013] Preferably, a plurality of angle-changing members are provided between the adjusting ring and the air outlet nozzle. The plurality of angle-changing members are circumferentially and evenly arranged, and there is a one-to-one correspondence between the plurality of angle-changing members and the plurality of air outlet nozzles. The angle-changing member includes a clamp and a connecting rod. The clamp is fixedly sleeved on the air outlet section of the air outlet nozzle, and the connecting rod is respectively hinged to the adjusting ring and the clamp.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By using the self-structure of the flow equalizing component to form self-rotation during the process of introducing air flow, the hot air flow is made uniform in the intake chamber and is conveyed towards the inside of the furnace from the directions of a plurality of circumferentially arranged air outlet nozzles, balancing the temperature in the entire furnace, reducing the temperature difference, improving the utilization rate of thermal energy in the air flow, making the temperature of the transverse section in the entire furnace uniform, using the position of the air outlet nozzle in the baking furnace to make the hot air flow and the enameled wire running in the furnace form a reverse direction, improving the heat conduction efficiency, obtaining good uniformity of baking temperature, accelerating the drying speed, maintaining the consistency of the enameled wire baking process, ensuring the quality of the enameled wire, and improving production efficiency;

[0016] 2. By using the axial displacement of the adjusting ring, the air outlet angle of the air outlet nozzle can be changed, so that the direction of the air flow blowing into the furnace can be adjusted. While ensuring the improvement of heat conduction efficiency, it is applicable to enameled wires under different wind speeds or different processes to avoid quality defects on the surface of the enameled wire caused by the air flow direction or air flow speed.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a partial structural schematic diagram of a reverse hot air circulation system of an enameled wire baking furnace according to an embodiment of the present application;

[0020] Figure 2 is an internal structural schematic diagram of a reverse hot air circulation system of an enameled wire baking furnace according to an embodiment of the present application Figure 1 ;

[0021] Figure 3 is an internal structural schematic diagram of a reverse hot air circulation system of an enameled wire baking furnace according to an embodiment of the present application Figure 2;

[0022] Figure 4 is a schematic internal structure diagram of a baking oven according to an embodiment of the present application;

[0023] Figure 5 is an exploded view of the structure at one end of the air inlet chamber according to an embodiment of the present application;

[0024] Figure 6 is according to an embodiment of the present application Figure 5 an enlarged schematic view of A in;

[0025] Figure 7 is an exploded view of the structure of the air outlet chamber according to an embodiment of the present application;

[0026] Figure 8 is a schematic partial structure diagram of one end of the air inlet chamber according to an embodiment of the present application;

[0027] Figure 9 is a schematic partial structure diagram of the air outlet chamber according to an embodiment of the present application;

[0028] Figure 10 is a schematic structure diagram of the air outlet nozzle according to an embodiment of the present application;

[0029] Figure 11 is a schematic partial structure diagram of the air outlet nozzle according to an embodiment of the present application;

[0030] Figure 12 is a side view of the spoiler in the inner cavity according to an embodiment of the present application;

[0031] Figure 13 is a schematic structure diagram of the spoiler according to an embodiment of the present application.

[0032] Icon: 1. Baking mechanism; 11. Feeding and discharging end; 111. Support plate; 2. Baking oven; 21. Inner cavity; 22. Air inlet chamber; 221. Air inlet housing; 222. Plug ring; 223. Air outlet hole; 23. Air outlet chamber; 231. Air outlet housing; 232. Stopper; 233. Reducing air duct; 3. Air flow circulation component; 31. Air supply part; 32. Air outlet part; 4. Flow equalizing component; 41. Upper end part; 42. Lower end part; 43. Arc-shaped partition board; 44. Arc-shaped air duct; 5. Countercurrent component; 51. Air outlet nozzle; 511. Positioning seat; 512. Connecting cylinder; 513. Limiting plate; 514. Spherical connecting piece; 515. Air outlet cylinder; 516. Reducing air outlet; 517. Flow stabilizing strip; 52. Adjusting ring; 521. Support rod; 522. Telescopic part; 53. Angle changing part; 531. Clamp; 532. Connecting rod; 6. Spoiler. Detailed implementation manners

[0033] The following will describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0035] Embodiment 1, as Figures 1 - 13 shown, a reverse hot air circulation system of an enameled wire baking oven according to an embodiment of the present application includes a baking mechanism 1 and an exhaust gas catalytic combustion device. The baking mechanism 1 internally houses a baking oven 2. A heating element is provided inside the baking oven 2. An air flow circulation component 3 is connected to the baking oven 2. The air flow circulation component 3 is connected to the exhaust gas catalytic combustion device and conveys the hot gas generated after combustion into the interior of the baking oven 2.

[0036] It should be noted that in the specific embodiments of the present application, the exhaust gas catalytic combustion device uses a catalyst to cause the exhaust gas and oxygen to undergo a sufficient oxidation reaction, generating carbon dioxide and water, while releasing a large amount of heat energy. The air flow circulation component 3 generates an air flow to convey the heat energy into the interior of the baking oven 2. The heating element can be an electric heating tube as the heat source. The above are all very mature existing technologies, so no detailed description will be given here.

[0037] Specifically, in a reverse hot air circulation system of an enameled wire baking oven according to an embodiment of the present application, the baking oven 2 is arranged in a double-layer structure, and the heating element is located between the two layers.

[0038] Among them, an air inlet chamber 22 is coaxially connected to the discharge end of the baking oven 2, and an air outlet chamber 23 is coaxially connected to the feed end of the baking oven 2. The air inlet chamber 22 and the air outlet chamber 23 are respectively connected to the air flow circulation component 3. It can be seen that the overall direction of the air flow in the baking oven 2 is reverse to the running direction of the enameled wire, which is used to improve the heat conduction efficiency and the drying speed.

[0039] A flow equalizing component 4 is rotatably arranged coaxially inside the air inlet chamber 22. The flow equalizing component 4 internally houses a plurality of arc-shaped channels. The arc-shaped channels change the direction of the air flow. It can be understood that the flow equalizing component 4 can rotate automatically under the action of the air flow, playing a role in turning the air flow and mixing the air flow inside the air inlet chamber 22 at the same time.

[0040] As Figure 4 shown, the inner diameter of the air inlet chamber 22 is smaller than the minimum inner diameter of the baking oven 2, and the inner and outer diameters of the air outlet chamber 23 are the same as the inner and outer diameters of the air inlet chamber 22.

[0041] On one side of the air inlet chamber 22 facing the furnace chamber, a countercurrent component 5 is provided. The countercurrent component 5 includes air outlet nozzles 51 evenly arranged circumferentially. The air outlet nozzles 51 communicate with one side of the air inlet chamber 22 facing the furnace chamber. The angle of the air outlet section of the air outlet nozzles 51 is adjustable. An adjusting ring 52 is coaxially arranged inside the air inlet chamber 22. The adjusting ring 52 is hinged to the plurality of air outlet nozzles 51. The adjusting ring 52 can axially displace inside the air inlet chamber 22. Thus, it can be seen that by the axial displacement of the adjusting ring 52, the plurality of air outlet nozzles 51 can be driven to change the angle axially, that is, change the angle at which the hot air flow blows towards the enameled wire.

[0042] In addition, a reverse hot air circulation system of an enameled wire baking furnace according to an embodiment of the present application further has the following additional technical features:

[0043] As Figures 1 - 3 shown, both ends of the baking mechanism 1 along the axial direction of the baking furnace 2 are feeding and discharging ends 11. A rectangular channel for the cable to pass through is provided on the feeding and discharging ends 11. A support plate 111 is fixedly connected to the lower side of the rectangular channel. Specifically, the enameled wire can pass through a special enameled wire conveying device (not shown in the figure) for smoothly conveying the enameled wire to be dried through the furnace chamber. The forms of the conveying device are diverse, such as guide wheels, guide rails, etc., which can ensure that the enameled wire maintains the correct position and direction during the drying process and avoid the mutual winding and collision between the enameled wires.

[0044] As Figure 3 and Figure 4 shown, the inner layer of the baking furnace 2 is an inner chamber 21. A cavity for placing heating elements is left between the inner chamber 21 and the baking furnace 2. It should be noted that the material of the inner chamber 21 is a metal material with good heat conduction effect, and the material of the baking furnace 2 is a heat insulation material to improve the utilization rate of heat energy and reduce the dissipation of heat energy.

[0045] As Figures 3 - 5 、 Figure 7 and Figure 8 shown, the air inlet chamber 22 includes an air inlet housing 221 and a blocking ring 222. The inside of the blocking ring 222 and the air inlet housing 221 forms an annular cavity. A plurality of air outlet holes 223 are evenly arranged circumferentially on one side of the blocking ring 222 facing the furnace chamber. The plurality of air outlet holes 223 correspond to and are hermetically connected to the plurality of air outlet nozzles 51 one by one. Thus, it can be seen that due to the rotation of the uniform flow component 4 under the action of the air flow in the annular cavity, the air flow in the air inlet chamber 22 is mixed, so the hot air discharged from the plurality of air outlet holes 223 will form uniformity as much as possible.

[0046] As Figure 3 、 Figure 4 、 Figure 7 and Figure 9As shown, the air outlet chamber 23 includes an air outlet housing 231 and a plurality of stoppers 232. An annular cavity is provided in the air outlet housing 231, and the plurality of stoppers 232 are axially and uniformly arranged in the annular cavity. The stoppers 232 are rectangular, and the outer sides of the stoppers 232 in the radial direction do not abut against the inner wall of the air outlet housing 231. A variable-diameter air passage 233 is formed between two adjacent stoppers 232.

[0047] It should be noted that the variable-diameter air passage 233 is designed to be gradually expanding along the radial direction outward. For details, see Figure 7 and Figure 9 As shown, this design is used to enhance the suction force at the inner air inlet end of the air outlet chamber 23.

[0048] As Figure 3 and Figure 4 As shown, the air flow circulation assembly 3 includes at least one air supply member 31 and at least one air outlet member 32. The air supply member 31 is communicated with the air inlet chamber 22 and arranged along the tangential direction of the air inlet chamber 22, and the air outlet member 32 is communicated with the air outlet chamber 23 and arranged along the tangential direction of the air outlet chamber 23. It can be understood that by the tangential arrangement, the rotation of the air flow in the air inlet chamber 22 and the air outlet chamber 23 can be further improved, and the uniformity of the air flow in the two chambers can be promoted.

[0049] It should be noted that the air supply member 31 and the air outlet member 32 can be blowers in the prior art and are driven by a variable-frequency motor to meet the formation of different air flow speeds.

[0050] From the above description, it can be seen that the air outlet member 32 generates a suction force in the annular cavity in the air outlet housing 231, and the direction of the suction force is tangential to the annular cavity in the air outlet housing 231. The suction force sucks the air flow in the furnace from the plurality of variable-diameter air passages 233. The design of the variable-diameter air passage 233 enhances the suction force at the air inlet of the air flow, so as to better suck the air flow in the furnace and prevent the air flow in the furnace from escaping from the feeding end of the baking mechanism 1. Further, it can be understood that after the air flow enters the variable-diameter air passage 233, it will rush towards the air outlet member 32 in the annular cavity in the air outlet housing 231. The tangential connection between the air outlet member 32 and the air outlet housing 231 causes the air flow to rotate in the annular cavity, and in cooperation with the design of the variable-diameter air passage 233, the suction force at the inner air inlet of the entire air outlet chamber 23 is made as balanced as possible, improving the adsorption effect on the air flow.

[0051] As Figure 8As shown, the flow equalizing component 4 includes an upper end portion 41, a lower end portion 42, and a plurality of arc-shaped partitions 43. The upper end portion 41 is rotatably arranged in the annular cavity between the air inlet housing 221 and the plug ring 222. The upper end portion 41 faces the side of the air outlet hole 223 in the annular cavity. The side of the upper end portion 41 away from the air outlet hole 223 is arc-shaped, and this arc is convex outward; the lower end portion 42 is rotatably arranged in the annular cavity between the air inlet housing 221 and the plug ring 222. The lower end portion 42 is on the side away from the air outlet hole 223 in the annular cavity. The side of the lower end portion 42 facing the upper end portion 41 is arc-shaped and similar to that of the upper end portion 41, and this arc is concave inward; a plurality of arc-shaped partitions 43 are fixedly connected circumferentially and evenly between the upper end portion 41 and the lower end portion 42; a plurality of arc-shaped partitions 43 isolate a plurality of arc-shaped channels between the upper end portion 41 and the lower end portion 42, and this arc-shaped channel is the arc-shaped air duct 44. It should be noted that the air inlet end of the arc-shaped air duct 44 is located on the side wall of the flow equalizing component 4, and the air outlet end of the arc-shaped air duct 44 is located at the end of the flow equalizing component 4 facing the air outlet hole 223. In this way, the air flow tangentially entering the air inlet chamber 22 will be changed from radial flow to axial flow, and when passing through the arc-shaped air duct 44, a rotational force will be applied to the side wall of the arc-shaped air duct 44, so that the flow equalizing component 4 has the potential energy of rotation.

[0052] As Figure 8 , Figure 10 and Figure 11 shown, the air outlet nozzle 51 includes a positioning seat 511, a connecting cylinder 512, a limiting plate 513, a spherical connecting piece 514, and an air outlet cylinder 515. The positioning seat 511 is hermetically inserted into the air outlet hole 223; the connecting cylinder 512 is hermetically communicated with the positioning seat 511, and specifically, thread connection can be adopted for easy installation or disassembly; the limiting plate 513 is fixedly connected to one end of the positioning seat 511 located inside the air outlet hole 223 for limiting the axial position of the positioning seat 511; the spherical connecting piece 514 is rotatably connected to the end of the connecting cylinder 512 away from the positioning seat 511, and the spherical connecting piece 514 is communicated with the connecting cylinder 512; the air outlet cylinder 515 is fixedly communicated with the spherical connecting piece 514, and the air outlet cylinder 515 extends out of the connecting cylinder 512.

[0053] It should be noted that the spherical connecting piece 514 and the connecting cylinder 512 are in sealed rotational connection before, and this end of the connecting cylinder 512 limits the spherical connecting piece 514 to prevent the spherical connecting piece 514 from detaching from this end of the connecting cylinder 512. Further, it should be noted that except for the part connecting the spherical connecting piece 514 in the connecting cylinder 512, the inner diameter of the remaining positions of the connecting cylinder 512 is not less than the outer diameter of the spherical connecting piece 514, that is, the spherical connecting piece 514 can be detached from the end of the connecting cylinder 512 connecting the positioning seat 511, which is convenient for the installation and disassembly of the spherical connecting piece 514.

[0054] As Figure 1 , Figure 2 ,Figure 4 , Figure 5 and Figure 8 As shown in Figure 4 , Figure 5 and Figure 8 , at least two support rods 521 are symmetrically and fixedly connected to the end face of the adjusting ring 52. The two support rods 521 sequentially slide and extend out of the baking oven 2 and the baking mechanism 1. Specifically, the support rods 521 slide through the end side wall of the air inlet chamber 22 to ensure that the support rods 521 are more stable during the sliding process and avoid axial swing. One end of the support rod 521 located outside the baking mechanism 1 is fixedly connected with a telescopic member 522 along the axial direction. The telescopic end of the telescopic member 522 is fixedly connected to the support rod 521, and the telescopic member 522 is fixedly connected to the baking mechanism 1. Thus, it can be understood that through the displacement change of the telescopic end of the telescopic member 522, the support rod 521 can be driven to generate axial displacement, and then the adjusting ring 52 can be driven to generate axial displacement.

[0055] It should be noted that the telescopic member 522 can be a hydraulic cylinder, an electric push rod, etc. in the prior art.

[0056] As Figure 6 shown, a plurality of angle-changing members 53 are arranged between the adjusting ring 52 and the air outlet nozzle 51. The plurality of angle-changing members 53 are evenly arranged in the circumferential direction, and the plurality of angle-changing members 53 and the plurality of air outlet nozzles 51 correspond one by one; the angle-changing member 53 includes a clamp 531 and a connecting rod 532. The clamp 531 is fixedly sleeved on the air outlet section of the air outlet nozzle 51, and the connecting rod 532 is respectively hinged to the adjusting ring 52 and the clamp 531.

[0057] It should be noted that the connecting rod 532 is arranged radially with respect to the adjusting ring 52.

[0058] Thus, it can be understood that through the connecting rod 532 hinged at both ends, the adjusting ring 52 with displacement can drive the air outlet section of the air outlet nozzle 51, that is, the air outlet cylinder 515, to generate an axial angle change on the connecting cylinder 512, so as to form airflows at different angles for the enameled wire.

[0059] The following describes the use process of a reverse hot air circulation system of an enameled wire baking oven according to an embodiment of the present application with reference to the accompanying drawings:

[0060] During use, the external hot air flow is transported to the intake chamber 22 by the air supply member 31. The kinetic energy of the air flow causes the flow equalizing assembly 4 to rotate within the intake chamber 22. The hot air flow mixes within the intake chamber 22 to form a uniform flow, and then blows from the intake chamber 22 towards the inner chamber 21 through multiple uniformly arranged air outlet nozzles 51 at the inner end. There is an enameled wire in the inner chamber 21 that enters from the direction of the air outlet chamber 23 and exits from the direction of the intake chamber 22. When the air flow blows onto the enameled wire in the inner chamber 21, the telescopic member 522 can drive the support rod 521 to drive the adjusting ring 52 to undergo an axial displacement, and the connecting rod 532 hinged at both ends can pull the air outlet cylinder 515 of the air outlet nozzle 51 to undergo an axial angular change. In this way, the angle at which the air flow blows onto the enameled wire can be changed, greatly improving the heat conduction efficiency. While obtaining good uniformity of the baking temperature, the drying speed of the enameled wire is accelerated, the consistency of the enameled wire baking process is maintained, the quality of the enameled wire is ensured, and the production efficiency is improved. The air outlet member 32 adsorbs the air flow in the inner chamber 21 through the air outlet chamber 23. Utilizing the structure within the air outlet chamber 23, the suction force at the intake end inside the air outlet member 32 is made uniform and strengthened, enhancing the suction effect on the air flow. With this design, first, the air flow enters the inner chamber 21 to form a uniform flow, which can reduce the temperature difference in the transverse cross-section of the baking oven 2. At the same time, the enameled wire is blown against in the reverse direction, and the air flow angle is adjustable. While ensuring an increase in the heat conduction efficiency, it is applicable to enameled wires under different wind speeds or different processes to avoid quality defects on the surface of the enameled wire caused by the air flow direction or air flow speed.

[0061] In the related art, in the reverse hot air circulation system of this enameled wire baking oven, after the hot air flow blows from the air outlet nozzle 51 into the inner chamber 21, since the paths formed by the multiple air flows blown out from the multiple air outlet nozzles 51 gradually converge, a turbulent phenomenon will form in the inner chamber 21 after the multiple air flows converge. Although the general trend is to flow towards the air outlet chamber 23, the turbulence in the inner chamber 21 will affect the temperature difference in the transverse cross-section and axial cross-section inside the inner chamber 21, having a certain adverse effect on the drying effect of the enameled wire.

[0062] Embodiment 2. According to some embodiments of the present application, as Figure 3 、 Figure 12 and Figure 13 shown, a plurality of flow disturbing members 6 are uniformly arranged circumferentially on the inner side of the inner layer of the baking oven 2. One end of the flow disturbing member 6 has a spacing from the adjusting ring 52 to facilitate better guidance of the multiple air flows blown out from the air outlet nozzle 51 by the flow disturbing member 6. The other end of the flow disturbing member 6 abuts against the air outlet chamber 23, specifically, against one end of the air outlet chamber 23 facing the inner chamber 21.

[0063] Specifically, the spoiler 6 is arranged in a spiral sheet shape along the axial direction of the baking oven 2, and the spoiler 6 is fixedly connected to the inner layer of the baking oven 2 along the axial direction of the baking oven 2. In this way, a plurality of spoilers 6 will form a plurality of spiral channels on the inner wall of the inner cavity 21 to play a certain guiding role in the air flow in the inner cavity 21 and relieve the turbulent flow phenomenon generated after the air flows meet.

[0064] Among them, the pitch of the spoiler 6 is gradually reduced from the air inlet chamber 22 to the air outlet chamber 23.

[0065] Specifically, the inner diameter of the spiral sheet of the spoiler 6 is gradually reduced from the air inlet chamber 22 to the air outlet chamber 23.

[0066] Therefore, during specific use, through the settings of the pitch and inner diameter of the spoiler 6, the axial flow velocity of the air flow in the inner cavity 21 will be slowed down from one end of the air inlet chamber 22 to one end of the air outlet chamber 23. As the air flow flows, the heat energy contained therein decreases, and the axial flow velocity of the air flow in the inner cavity 21 also decreases at this time. Therefore, the heat energy in the air flow will be better utilized, avoiding the direct escape of the heat energy from the inner cavity 21 along with the air flow. At the same time, due to the effect of the change in the inner diameter of the spoiler 6, the turbulent flow in the air flow will gradually form a regular guiding, reducing the turbulent flow state. The reduction of the turbulent flow will further ensure the axial flow of the air flow in the inner cavity 21 and the guiding flow by the spiral air duct, making the flow of the air flow in the inner cavity 21 more regular. In this way, the drying effect of the enameled wire will be improved.

[0067] In the related art, in the reverse hot air circulation system of the enameled wire baking oven, when the air flow blows out from the air outlet cylinder 515, under the straight cylinder structure of the air outlet cylinder 515, the air flow forms a strand shape. Especially when the flow velocity of the air flow is relatively fast, the strand-shaped air flow will be more obvious. The strand-shaped air flow will first cause a strong impact on the enameled wire, and secondly, it will cause the flow velocity of the air flow on the side of the inner cavity 21 close to the air inlet chamber 22 to be too fast, resulting in a greater probability of temperature differentiation on the side of the inner cavity 21 close to the air inlet chamber 22, which is an adverse factor for the drying of the enameled wire.

[0068] Example 3, According to some embodiments of the present application, as Figure 10 and Figure 11 shown, an expanding structure is coaxially fixedly connected to the air outlet section of the air outlet nozzle 51. The caliber of the expanding structure is gradually enlarged, and a plurality of guiding structures are uniformly arranged in the circumferential direction on the inner side of the expanding structure. The guiding structures are arranged along the axial direction of the expanding structure.

[0069] Specifically, the expanding structure coaxially connected to the air outlet nozzle 51 is a variable-diameter air outlet 516, and the diameter of the variable-diameter air outlet 516 gradually increases from the air inlet end to the air outlet end.

[0070] Among them, the guiding structure in the variable-diameter air outlet 516 is a flow-stabilizing strip 517. The flow-stabilizing strip 517 is fixedly connected to the inner wall of the variable-diameter air outlet 516, and multiple flow-stabilizing strips 517 are radially distributed in the variable-diameter air outlet 516.

[0071] Thus, when in specific use, when the air flow flows from the air outlet cylinder 515 to the variable-diameter air outlet 516, affected by the factor of the gradually increasing fluid cross-section, the flow rate of the air flow will be reduced to a certain extent, reducing the impact of the air flow on the enameled wire. At the same time, the multiple radially distributed flow-stabilizing strips 517 will maintain the stability and continuity of the air flow in the variable-diameter air outlet 516, improve the efficiency of air flow transportation, and at the same time enable the air flow to be more evenly distributed when flowing out of the variable-diameter air outlet 516, which helps to reduce the vortex and turbulence phenomena formed when the air flow blows out of the air outlet nozzle 51. This design improves the stability and controllability of the air flow.

[0072] It should be noted that the specific model specifications of the air supply member 31, the air outlet member 32, and the telescopic member 522 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in the field, so it will not be elaborated in detail.

[0073] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A reverse hot air circulation system for an enamelled wire baking oven, comprising a baking mechanism (1) and an exhaust gas catalytic combustion device. The baking mechanism (1) is internally provided with a baking oven (2), a heating element is arranged inside the baking oven (2), an air flow circulation assembly (3) is communicated with the baking oven (2), and the air flow circulation assembly (3) is communicated with the exhaust gas catalytic combustion device and conveys the hot gas generated after combustion to the inside of the baking oven (2), characterized in that, Further comprising: The baking furnace (2) is arranged in a double-layer structure, and the heating element is located between the two layers; An air inlet chamber (22) is coaxially connected to the discharge end of the baking furnace (2), and an air outlet chamber (23) is coaxially connected to the feeding end of the baking furnace (2). The air inlet chamber (22) and the air outlet chamber (23) are respectively connected to the air flow circulation assembly (3); A flow equalizing assembly (4) is coaxially and rotatably arranged inside the air inlet chamber (22). The flow equalizing assembly (4) is internally provided with a plurality of arc-shaped channels for deflecting the air flow; The inner diameter of the air inlet chamber (22) is smaller than the inner diameter of the baking furnace (2); The inner and outer diameters of the air outlet chamber (23) are the same as the inner and outer diameters of the air inlet chamber (22); A countercurrent assembly (5) is arranged on the side of the air inlet chamber (22) facing the furnace chamber. The countercurrent assembly (5) includes air outlet nozzles (51) evenly arranged in the circumferential direction. The air outlet nozzles (51) are connected to the side of the air inlet chamber (22) facing the furnace chamber. The angle of the air outlet section of the air outlet nozzles (51) is adjustable. An adjusting ring (52) is coaxially arranged inside the air inlet chamber (22). The adjusting ring (52) is hinged to a plurality of the air outlet nozzles (51), and the adjusting ring (52) can axially displace inside the air inlet chamber (22); The air inlet chamber (22) includes an air inlet housing (221) and a blocking ring (222). The interior of the blocking ring (222) and the air inlet housing (221) forms an annular cavity. A plurality of air outlet holes (223) are evenly arranged in the circumferential direction on the side of the blocking ring (222) facing the furnace chamber. The plurality of air outlet holes (223) correspond to and are hermetically connected to the plurality of air outlet nozzles (51) one by one; The flow equalizing assembly (4) includes: An upper end portion (41) rotatably arranged in the annular cavity between the air inlet housing (221) and the blocking ring (222). The upper end portion (41) is on the side facing the air outlet holes (223) in the annular cavity. The side of the upper end portion (41) away from the air outlet holes (223) is arc-shaped and convex outward; A lower end portion (42) rotatably arranged in the annular cavity between the air inlet housing (221) and the blocking ring (222). The lower end portion (42) is on the side away from the air outlet holes (223) in the annular cavity. The side of the lower end portion (42) facing the upper end portion (41) is arc-shaped and similar to that of the upper end portion (41), and this arc is concave inward; A plurality of arc-shaped partition plates (43) evenly and fixedly connected in the circumferential direction between the upper end portion (41) and the lower end portion (42); The plurality of arc-shaped partition plates (43) separate a plurality of the arc-shaped channels between the upper end portion (41) and the lower end portion (42), and the arc-shaped channels are arc-shaped air ducts (44); 2. The reverse hot air circulation system of an enameled wire baking oven as described in claim 1, wherein The two axial ends of the baking mechanism (1) along the baking furnace (2) are feeding and discharging ends (11). A rectangular channel for the cable to pass through is arranged on the feeding and discharging ends (11), and a support plate (111) is fixedly connected to the lower side of the rectangular channel.

3. The reverse hot air circulation system of an enameled wire baking oven as described in claim 1, characterized in that, The inner layer of the baking oven (2) is an inner cavity (21), and a cavity for placing the heating element is left between the inner cavity (21) and the baking oven (2).

4. The reverse hot air circulation system of an enameled wire baking furnace according to claim 1, characterized in that, The air outlet chamber (23) includes an air outlet housing (231) and a plurality of stoppers (232). An annular cavity is provided in the air outlet housing (231), and the plurality of stoppers (232) are axially and uniformly arranged in the annular cavity; The stopper (232) is rectangularly arranged, and the outer side of the stopper (232) in the radial direction does not abut against the inner wall of the air outlet housing (231); A variable-diameter air passage (233) is formed between two adjacent stoppers (232).

5. The reverse hot air circulation system of an enameled wire baking oven as described in claim 1, characterized in that, The air flow circulation assembly (3) includes at least one air supply member (31) and at least one air outlet member (32). The air supply member (31) is communicated with the air inlet chamber (22) and is arranged along the tangential direction of the air inlet chamber (22), and the air outlet member (32) is communicated with the air outlet chamber (23) and is arranged along the tangential direction of the air outlet chamber (23).

6. The reverse hot air circulation system of an enameled wire baking oven as described in claim 1, characterized in that, The air outlet nozzle (51) includes: A positioning seat (511) that is sealingly inserted into the air outlet hole (223); A connecting cylinder (512) that is sealingly communicated with the positioning seat (511); A limiting plate (513) fixedly connected to one end of the positioning seat (511) inside the air outlet hole (223); A spherical connecting member (514) rotatably connected to one end of the connecting cylinder (512) away from the positioning seat (511), and the spherical connecting member (514) is communicated with the connecting cylinder (512); An air outlet cylinder (515) fixedly communicated with the spherical connecting member (514), and the air outlet cylinder (515) extends out of the connecting cylinder (512).

7. The reverse hot air circulation system of an enameled wire baking oven according to claim 1, characterized in that, At least two support rods (521) are symmetrically and fixedly connected to the end surface of the adjusting ring (52). The two support rods (521) sequentially slide out of the baking oven (2) and the baking mechanism (1). One end of the support rod (521) outside the baking mechanism (1) is fixedly connected with a telescopic member (522) along the axial direction. The telescopic end of the telescopic member (522) is fixedly connected to the support rod (521), and the telescopic member (522) is fixedly connected to the baking mechanism (1).

8. The reverse hot air circulation system of an enameled wire baking oven according to claim 1, characterized in that, A plurality of angle-changing members (53) are arranged between the adjusting ring (52) and the air outlet nozzle (51). The plurality of angle-changing members (53) are circumferentially and uniformly arranged, and the plurality of angle-changing members (53) and the plurality of air outlet nozzles (51) are in one-to-one correspondence; The angle-changing member (53) includes a clamp (531) and a connecting rod (532). The clamp (531) is fixedly sleeved on the air outlet section of the air outlet nozzle (51), and the connecting rod (532) is respectively hinged to the adjusting ring (52) and the clamp (531).

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