Continuous immersion drying equipment

Abstract

The present invention discloses a continuous immersion drying device, which relates to the technical field of product immersion drying production equipment, wherein the continuous immersion drying device comprises: a furnace body, wherein an immersion area and a drying area are provided in the furnace body; a conveying device, arranged in the furnace body, wherein the conveying device is used to transfer workpieces between the immersion area and the drying area; an immersion device, arranged in the immersion area, wherein the immersion device is used to immerse the workpieces in the immersion area; and an infrared radiation device, arranged in the drying area, wherein the infrared radiation device is used to perform infrared radiation heating on the workpieces in the drying area. The technical solution provided by the present invention realizes continuous immersion and drying treatment of workpieces, and can improve heating and drying efficiency, and reduce production energy consumption per unit product.

Description

Technical Field

[0001] The present invention relates to the technical field of product immersion drying production equipment, in particular to continuous immersion drying equipment. Background Art

[0002] In the relevant technology, some products often involve processes such as surface immersion and drying during the production process. Taking the motor as an example, the stator of the motor needs to be dipped in paint during the production process and then dried to form an insulating layer on the surface of the stator, so as to meet the insulation performance requirements. At present, the stator continuous immersion drying equipment on the market mostly uses resistance hot air circulation heating to dry the paint film on the stator surface; the energy transfer mode of this heating method is that the heat is generated by resistance heating, the heat is transferred to the air, and then the air is transferred to the surface of the paint film; the number of medium exchanges during the entire energy transfer process is too many, resulting in a lot of energy waste, low heating and drying efficiency, and high production energy consumption per unit product. Summary of the Invention

[0003] The main purpose of the present invention is to propose a continuous immersion and drying equipment, which aims to realize continuous immersion and drying treatment of workpieces, improve heating and drying efficiency, and reduce production energy consumption per unit product.

[0004] To achieve the above-mentioned purpose, the continuous immersion drying equipment proposed by the present invention comprises:

[0005] A furnace body, wherein an immersion area and a drying area are provided in the furnace body;

[0006] A conveying device, provided in the furnace body, for transferring the workpiece between the immersion area and the drying area;

[0007] an immersion device, disposed in the immersion area, for immersing the workpiece in the immersion area; and

[0008] An infrared radiation device is provided in the drying area and is used for performing infrared radiation heating on the workpieces in the drying area.

[0009] In one embodiment, the furnace body has a first side wall and a second side wall opposite to each other in the radiation direction of the infrared radiation device;

[0010] At least the inner wall surfaces of the first side wall and the second side wall corresponding to the drying area are set as smooth surfaces; or, at least the inner sides of the first side wall and the second side wall corresponding to the drying area are provided with smooth panels.

[0011] In one embodiment, the infrared radiation device includes radiation modules disposed on two opposite sides of the furnace body along a radiation direction, and each radiation module includes a radiation plate for radiating infrared rays.

[0012] In one embodiment, the radiation plate is used to radiate medium- and long-wave infrared rays; and / or the surface temperature of the radiation plate in a working state is 200° C. to 450° C.

[0013] In one embodiment, the infrared radiation device further comprises a mounting frame, the radiation module comprises a plurality of radiation panels, and the radiation module is detachably mounted on the mounting frame;

[0014] And / or, the infrared radiation device further comprises a protective cover arranged outside the radiation plate, the protective cover having a through hole for the radiation plate to radiate infrared rays toward the drying area;

[0015] And / or, each of the radiation modules is independently connected to a power-off protection switch.

[0016] In one embodiment, the drying area includes a pre-drying area, a main drying area, and a post-drying area, and the conveying device is used to convey the workpiece from the pre-drying area to the immersion area, and then to the main drying area and the post-drying area in sequence;

[0017] The number of radiation panels provided in the pre-drying area is smaller than the number of radiation panels provided in the post-drying area, and the number of radiation panels provided in the post-drying area is smaller than the number of radiation panels provided in the main drying area.

[0018] In one embodiment, the pre-drying area and the main drying area are respectively arranged on both sides of the immersion area in the horizontal direction, and the post-drying area is arranged on one side of the immersion area in the vertical direction;

[0019] The conveying device is used to circulate the workpiece along a circular route including the pre-drying area, the immersion area, the main drying area, the post-drying area, and the pre-drying area.

[0020] In one embodiment, the pre-drying area, the main drying area, and the post-drying area are respectively provided with temperature measuring elements;

[0021] And / or, the pre-drying area, the main drying area and the post-drying area are respectively provided with a stirring fan.

[0022] In one embodiment, the furnace body is provided with a front waste discharge port and a rear waste discharge port at both ends along the conveying direction of the conveying device;

[0023] The front exhaust port is provided with a natural exhaust valve and / or a temperature and humidity sensor;

[0024] The rear end exhaust port is provided with a natural exhaust valve, and / or a temperature and humidity sensor, and / or a variable frequency exhaust fan.

[0025] In one embodiment, the continuous immersion drying equipment also includes a slag collecting device arranged in the immersion area, the slag collecting device includes a slag collecting funnel open at the top and bottom, and a slag collecting plate detachably arranged at the bottom of the slag collecting funnel, and the slag collecting device is located on one side of the immersion device and is used to receive the residue dripping from the surface of the workpiece after immersion treatment.

[0026] In one embodiment, the slag receiving funnel has a plurality of side panels for enclosing and forming a funnel cavity, and at least some of the side panels are detachable.

[0027] In one embodiment, the immersion device includes a lifting mechanism and an immersion tank drivingly connected to the lifting mechanism, and the lifting mechanism is used to drive the immersion tank to adjust the height to at least two fixed gears.

[0028] The technical solution of the present invention uses a conveying device to transfer the workpiece between the immersion area and the drying area, uses the immersion device to perform surface immersion treatment on the workpiece in the immersion area, and then uses the infrared radiation device to perform infrared radiation heating on the workpiece in the drying area to dry its surface, thereby realizing continuous immersion and drying treatment of the workpiece, which can improve production efficiency. In addition, traditional continuous immersion and drying equipment uses a resistance hot air circulation heating method, which requires air as a medium to transfer heat, resulting in a large amount of heat loss, and low heating and drying efficiency and energy utilization. The technical solution of the present invention uses an infrared radiation heating method, and the infrared rays radiated by the infrared radiation device can be directly absorbed by the film layer on the surface of the workpiece, avoiding any medium in the heating process, reducing energy loss, improving heating and drying efficiency, and reducing production energy consumption per unit product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 A schematic structural diagram of an embodiment of the continuous immersion drying equipment provided by the present invention;

[0031] Figure 2 for Figure 1 Cross-sectional view of the continuous immersion drying equipment;

[0032] Figure 3 for Figure 1 Schematic diagram of the structure of the mid-infrared radiation device;

[0033] Figure 4 for Figure 1 Schematic diagram of the structure of the center slag receiving device.

[0034] Description of Figure Numbers:

[0035] 100. Continuous immersion drying equipment; 10. Furnace body; 101. Immersion area; 102. Drying area; 102a. Pre-drying area; 102b. Main drying area; 102c. Post-drying area; 11. First side wall; 12. Second side wall; 13. Smooth surface; 14. Front waste outlet; 15. Rear waste outlet; 20. Conveying device; 21. Hanging basket; 30. Immersion device; 31. Lifting mechanism; 32. Immersion tank; 40. Infrared radiation device; 41. Radiation module; 411. Radiation plate; 42. Mounting frame; 43. Protective cover; 50. Temperature measuring element; 60. Stirring fan; 70. Slag receiving device; 71. Slag receiving funnel; 711. Side panel; 72. Slag receiving tray.

[0036] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] In the relevant technology, some products often involve processes such as surface immersion and drying during the production process. Taking the motor as an example, the stator of the motor needs to be dipped in paint during the production process and then dried to form an insulating layer on the surface of the stator, so as to meet the insulation performance requirements. At present, the stator continuous immersion drying equipment on the market mostly uses resistance hot air circulation heating to dry the paint film on the stator surface; the energy transfer mode of this heating method is that the heat is generated by resistance heating, the heat is transferred to the air, and then the air is transferred to the surface of the paint film; the number of medium exchanges during the entire energy transfer process is too many, resulting in a lot of energy waste, low heating and drying efficiency, and high production energy consumption per unit product.

[0041] The present invention provides a continuous immersion and drying apparatus 100 for continuously immersing and drying a workpiece, specifically a product or component that requires surface immersion treatment during production and subsequent surface drying. The following example primarily uses a motor stator as an example workpiece to be processed. During production, the motor stator first undergoes an immersion treatment (i.e., a paint immersion treatment) to deposit a layer of paint film on its surface, and then undergoes a drying process to solidify the paint film on its surface, forming a stable and reliable insulating layer.

[0042] See also Figure 1In one embodiment of the present invention, the continuous immersion drying equipment 100 includes a furnace body 10, a conveying device 20, an immersion device 30, and an infrared radiation device 40. The furnace body 10 is provided with an immersion area 101 and a drying area 102; the conveying device 20 is provided in the furnace body 10 and is used to transfer workpieces between the immersion area 101 and the drying area 102; the immersion device 30 is provided in the immersion area 101 and is used to immerse the workpieces in the immersion area 101; and the infrared radiation device 40 is provided in the drying area 102 and is used to heat the workpieces in the drying area 102 by infrared radiation.

[0043] In this embodiment, the furnace body 10 constitutes the main support structure of the continuous immersion drying equipment 100, and the immersion area 101 and the drying area 102 are constructed in the furnace body 10. For example, a partition plate can be set in the furnace body 10 to separate the inner cavity of the furnace body 10 into different functional areas, and switch doors can also be set between different functional areas to conduct or isolate them. The conveying device 20 is used to transport the workpiece between the various functional areas. The conveying form of the conveying device 20 can be various. For example, the conveying device 20 can use a linear conveying mechanism to transport the workpiece along a linear path, or the conveying device 20 can also use a circular conveying mechanism to transport the workpiece along a circular route, or the conveying device 20 can also use other conveying methods to transport the workpiece, as long as it is ensured that the workpiece can move between the various functional areas. For example, the conveying device 20 may include a linear or circular conveying chain, and the conveying chain is provided with a plurality of hanging baskets 21 at intervals along its length, and the hanging baskets 21 can be used to load workpieces.

[0044] When the continuous immersion drying equipment 100 is used for the production of motor stators, the stator is first transported to the immersion area 101 by the conveying device 20, and the stator surface is immersed by the immersion device 30 in the immersion area 101. For example, the immersion tank 32 of the immersion device 30 can be loaded with water-based paint, and the stator is loaded in the hanging basket 21 of the conveying device 20. When the hanging basket 21 loaded with the stator moves to the area above the immersion device 30, the hanging basket 21 loaded with the stator can be immersed in the immersion tank 32 through the lifting movement of the hanging basket 21 or the lifting movement of the immersion device 30, so that the stator surface is covered with a paint film; then, the conveying device 20 transports the immersed stator to the drying area 102, and the paint film on the stator surface is heated by infrared radiation by the infrared radiation device 40 in the drying area 102 to dry and solidify the paint film on the stator surface. Among them, infrared radiation heating refers to the infrared radiation emitted by the infrared radiation device 40, which is directly absorbed by the paint film on the surface of the stator to achieve the purpose of infrared radiation heating and drying the paint film on the surface of the stator. Usually, the stator dipping process generally adopts water-based paint, and water-based paint has good absorption characteristics for medium and long-wave infrared rays. Optionally, the infrared radiation device 40 is used to radiate medium and long-wave infrared rays to perform infrared radiation heating on the paint film on the surface of the stator. The use of medium and long-wave infrared radiation has a higher absorption rate than conventional infrared radiation, which can further improve the drying efficiency. Among them, medium and long-wave infrared radiation includes medium-infrared radiation and long-wave infrared radiation. Medium-infrared radiation generally refers to infrared radiation with a wavelength between 3 microns and 5 microns. Long-wave infrared radiation refers to infrared radiation with a wavelength between 8 microns and 15 microns.

[0045] The technical solution of the present invention uses a conveying device 20 to transfer the workpiece between the immersion area 101 and the drying area 102, uses an immersion device 30 to immerse the surface of the workpiece in the immersion area 101, and then uses an infrared radiation device 40 to heat the workpiece in the drying area 102 to dry its surface, thereby achieving continuous immersion and drying of the workpiece, which can improve production efficiency. In addition, the traditional continuous immersion and drying equipment 100 uses a resistive hot air circulation heating method, which requires air as a medium to transfer heat, resulting in a large amount of heat loss, low heating and drying efficiency and energy utilization. The technical solution of the present invention uses infrared radiation heating. The infrared rays radiated by the infrared radiation device 40 can be directly absorbed by the film layer on the surface of the workpiece, avoiding any medium in the heating process, reducing energy loss, improving heating and drying efficiency, and reducing the production energy consumption per unit product. In addition, infrared radiation heating has strong penetrating power and can heat the inside and outside of the workpiece simultaneously, so that the inside and outside of the workpiece are heated evenly and transparently, and the temperature between the inside and surface of the workpiece is relatively uniform, avoiding problems such as peeling or blisters on the workpiece surface, and improving the product qualification rate.

[0046] Traditional stator continuous immersion drying equipment uses resistance hot air circulation heating. The inner wall of its furnace is usually a rough porous structure to achieve the effect of sound absorption and noise reduction. If used for infrared radiation heating, the inner wall of the furnace is too rough and it is easy to cause diffuse reflection of the radiated infrared rays, affecting the heating effect of infrared radiation.

[0047] In order to better apply infrared radiation heating and improve the infrared radiation heating effect, please refer to Figure 1 and Figure 2 In one embodiment, the furnace body 10 has a first side wall 11 and a second side wall 12 opposite to each other in the radiation direction of the infrared radiation device 40; the inner wall surfaces of at least the first side wall 11 and the second side wall 12 corresponding to the drying area 102 are set to be a light surface 13; or, the inner sides of at least the first side wall 11 and the second side wall 12 corresponding to the drying area 102 are provided with a light panel.

[0048] In this embodiment, the first side wall 11 and the second side wall 12 can be two side walls opposite each other in the width direction of the furnace body 10. The inner walls of at least the portions of the first side wall 11 and the second side wall 12 corresponding to the drying area 102 are provided with a polished surface 13, or the inner sides of at least the portions of the first side wall 11 and the second side wall 12 corresponding to the drying area 102 are provided with a polished panel. Whether the side walls of the furnace body 10 are provided with a polished surface 13 or the inner sides of the furnace body 10 are provided with a polished panel, the purpose is to reduce the diffuse reflection caused by the rough surface of the conventional furnace body 10, thereby reducing energy waste, improving infrared heating efficiency, and making infrared heating more uniform. To simplify the manufacturing process, the inner wall surfaces of the first side wall 11 and the second side wall 12 corresponding to each area (including the drying area 102 and the immersion area 101) of the furnace body 10 are optionally provided with a polished surface 13. For example, when manufacturing the furnace body 10, stainless steel can be used, so that the inner wall surfaces on both sides of the furnace body 10 (i.e., the inner wall surfaces of the first side wall 11 and the second side wall 12) are stainless steel polished surfaces 13. Of course, in some embodiments, based on the structure of the original furnace body 10 with a rough inner surface, a light panel can be added to the inner side of the furnace body 10 to cover the rough parts of the original inner surface of the furnace body 10 .

[0049] like Figure 2 and Figure 3 As shown, in one embodiment, the infrared radiation device 40 includes radiation modules 41 disposed on opposite sides of the furnace body 10 along the radiation direction, and each radiation module 41 includes a radiation plate 411 for radiating infrared rays.

[0050] In this embodiment, the furnace body 10 may include a first side wall 11 and a second side wall 12 that oppose each other along the width direction. Radiation modules 41 are respectively provided on the inner sides of the first and second side walls 11, 12. Each radiation module 41 includes a radiation plate 411, with the radiation plates 411 located on both sides of the furnace body 10 corresponding to each other. The number of radiation plates 411 in a radiation module 41 may be one, two, three, or more. To simplify the assembly process, multiple radiation plates 411 may optionally be grouped together to form a radiation module 41. For example, three radiation plates 411 may form a radiation module 41. Through the modular design, each radiation module 41 can be individually disassembled and assembled. Furthermore, the use of the radiation plates 411 for infrared heating of the drying area 102 provides a larger radiation area, thereby improving heating and drying efficiency. The shape of the radiation plates 411 can be designed according to actual needs. For example, the radiation plates 411 may be flat, curved, or other special-shaped plates. Optionally, a plurality of radiation modules 41 are arranged at intervals on the first side wall 11 and the second side wall 12 of the furnace body 10 in the extension direction of the drying area 102 (for example, the length direction of the furnace body 10), so that the radiation modules 41 can be distributed as much as possible in various parts of the drying area 102 to improve heating uniformity.

[0051] Typically, stator varnishing processes use water-based paint, which has excellent absorption properties for medium- and long-wave infrared radiation. Optionally, the radiation plate 411 is used to radiate medium- and long-wave infrared radiation. Using medium- and long-wave infrared radiation has a higher absorption rate than conventional infrared radiation, further improving drying efficiency. Medium- and long-wave infrared radiation includes mid-infrared radiation and long-wave infrared radiation. Mid-infrared radiation generally refers to infrared radiation with a wavelength between 3 and 5 microns. Long-wave infrared radiation refers to infrared radiation with a wavelength between 8 and 15 microns.

[0052] Optionally, the surface temperature of the radiation plate 411 in the working state is 200°C to 450°C. For example, an intelligent temperature control system can be used to monitor the surface temperature of the radiation plate 411 in real time using an optical temperature sensor, and PID (proportional-integral-differential) closed-loop control can be performed according to the set temperature to maintain the surface temperature of the radiation plate 411 within the range of 200°C to 450°C. This ensures that the surface temperature of the radiation plate 411 is not too high. This can solve the problems of excessively high surface temperature of conventional infrared radiation devices 40 (generally 300°C to 900°C), which leads to damage to the circuits and rapid aging caused by excessively high surface temperature of the entire device, and can extend the service life of the infrared radiation device 40.

[0053] In order to improve the efficiency of disassembly and assembly and facilitate maintenance, such as Figure 2 and Figure 3As shown, in one embodiment, the infrared radiation device 40 further includes a mounting frame 42 , the radiation module 41 includes a plurality of radiation plates 411 , and the radiation module 41 is detachably mounted on the mounting frame 42 .

[0054] In this embodiment, based on the scattered installation characteristics of the infrared radiation device 40, a modular design is adopted. Multiple radiation panels 411 (for example, three radiation panels 411) are grouped together to form a radiation module 41. Each radiation module 41 can be independently removed and installed from the mounting bracket 42. In this way, if a radiation module 41 fails and requires replacement or repair, it only needs to be removed from the mounting bracket 42, without having to replace the entire infrared radiation device 40, thereby reducing maintenance costs.

[0055] Optionally, the radiation module 41 and the mounting frame 42 are detachably connected using a drawer-type structure. For example, the mounting frame 42 is provided with drawer grooves on both sides corresponding to the radiation module 41, and the two sides of the radiation module 41 are slidably arranged in the drawer grooves. When the radiation module 41 needs to be removed, it is only necessary to pull the radiation module 41 out from the mounting frame 42. During assembly, the radiation module 41 is inserted into the drawer groove of the mounting frame 42. In this way, quick installation, replacement and maintenance can be achieved, avoiding the problem of difficult replacement and maintenance of most radiation devices in medium and large equipment.

[0056] like Figure 2 and Figure 3 As shown, in one embodiment, the infrared radiation device 40 further includes a protective cover 43 disposed outside the radiation plate 411. The protective cover 43 has a through hole for the radiation plate 411 to radiate infrared rays toward the drying area 102. In this embodiment, the radiation plate 411 is located within the protective cover 43. The infrared rays radiated by the radiation plate 411 can be radiated to the drying area 102 through the through hole in the protective cover 43 to ensure the normal operation of the radiation plate 411. The protective cover 43 also protects the radiation plate 411, preventing the radiation plate 411 from accidentally falling off and causing damage to other components within the furnace body 10. It also prevents paint on the surface of the workpiece from dripping onto the surface of the radiation plate 411 and affecting the heating performance of the radiation plate 411. Optionally, the protective cover 43 is a metal mesh cover, which has a simple structure and good high-temperature resistance and is not easily deformed or damaged in high-temperature environments.

[0057] In one embodiment, each radiation module 41 is independently connected to a power-off switch. For example, three radiation panels 411 form a radiation module 41, and each radiation module 41 is connected to a power-off switch. If a radiation module 41 malfunctions or is no longer required, the corresponding power-off switch can disconnect that radiation module 41 from the power circuit without affecting the normal operation of other radiation modules 41. This facilitates the rapid installation and routine maintenance of the infrared radiation device 40, ensuring the stable operation of the entire infrared radiation device 40 and meeting the maintenance requirements of production units without interrupting production.

[0058] like Figure 1 As shown, in one embodiment, the drying area 102 includes a pre-drying area 102a, a main drying area 102b and a post-drying area 102c, and the conveying device 20 is used to convey the workpiece from the pre-drying area 102a to the immersion area 101, and then convey it to the main drying area 102b and the post-drying area 102c in sequence; wherein, the number of radiation plates 411 set in the pre-drying area 102a is less than the number of radiation plates 411 set in the post-drying area 102c, and the number of radiation plates 411 set in the post-drying area 102c is less than the number of radiation plates 411 set in the main drying area 102b.

[0059] In this embodiment, when the above-mentioned equipment is in operation, the conveying device 20 first conveys the workpiece to the pre-drying area 102a for preheating to keep the workpiece surface dry; then conveys the workpiece to the immersion area 101 for immersion treatment to coat the workpiece surface with a paint film; then conveys the workpiece to the main drying area 102b for heating to dry the paint film on the workpiece surface; and finally conveys the workpiece to the post-drying area 102c for heating to further solidify the paint film on the workpiece surface. It is understood that the heating requirements corresponding to different drying areas 102 will vary. For example, the pre-drying area 102a requires relatively less heat, the main drying area 102b requires the most heat, and the post-drying area 102c requires a heat requirement between the pre-drying area 102a and the main drying area 102b. To make the equipment more energy-efficient and achieve better heating effects, different numbers of radiation panels 411 are designed for different drying areas 102 according to the equipment structure and heating requirements to meet different heating requirements. Optionally, the number of radiation panels 411 provided in the pre-drying area 102a is smaller than the number of radiation panels 411 provided in the post-drying area 102c, and the number of radiation panels 411 provided in the post-drying area 102c is smaller than the number of radiation panels 411 provided in the main drying area 102b. Optionally, the ratio of the number of radiation panels 411 corresponding to the pre-drying area 102a, the post-drying area 102c, and the main drying area 102b is 1:2:4. Figure 1As shown, taking the radiation plates 411 arranged on the same side of the furnace body 10 as an example, illustratively, the pre-drying area 102a is provided with three radiation plates 411 (i.e., one group of radiation modules 40), the post-drying area 102c is provided with six radiation plates 411 (i.e., two groups of radiation modules 40), and the main drying area 102b is provided with twelve radiation plates 411 (i.e., four groups of radiation modules 40).

[0060] In order to make full use of the space in the furnace body 10 and improve production efficiency, Figure 1 As shown, in one embodiment, the pre-drying area 102a and the main drying area 102b are respectively arranged on both sides of the immersion area 101 in the horizontal direction, and the post-drying area 102c is arranged on one side of the immersion area 101 in the vertical direction; the conveying device 20 is used to circulate the workpiece along a circular route of the pre-drying area 102a, the immersion area 101, the main drying area 102b, the post-drying area 102c, and the pre-drying area 102a.

[0061] In this embodiment, the pre-drying area 102a and the main drying area 102b can be arranged on both sides of the immersion area 101 along the length direction of the furnace body 10, and the post-drying area 102c is arranged on the upper side of the immersion area 101, so that the space in the furnace body 10 is fully utilized. The conveying device 20 may include an annular conveyor belt and a plurality of hanging baskets 21 arranged at intervals on the conveyor belt. The hanging baskets 21 loaded with workpieces are driven by the annular conveyor belt to be conveyed along a circular route, so that the workpieces can pass through the pre-drying area 102a, the immersion area 101, the drying area 102, the post-drying area 102c in sequence, and then return to the pre-drying area 102a, forming a closed-loop transportation, thereby improving the turnover efficiency of the workpieces and improving production efficiency.

[0062] like Figure 1 As shown, in one embodiment, the pre-drying zone 102a, the main drying zone 102b, and the post-drying zone 102c are each equipped with a temperature measuring element 50. The temperature measuring element 50 detects the temperature of each drying zone 102 and feeds the detection results back to the intelligent temperature control PID control system, which then regulates the temperature of each zone. To ensure accurate temperature measurement, the temperature measuring element 50 is optionally located above the center of each zone. Examples of the temperature measuring element 50 include, but are not limited to, thermocouples, thermistor sensors, infrared temperature sensors, and the like.

[0063] When applied to the stator dipping scene, the stator surface is coated with water-based paint, which is different from the scene of windless baking powder, etc. In order to ensure that the humidity around the stator is quickly balanced with the air in the furnace body 10, such as Figure 1As shown, in one embodiment, the pre-drying area 102a, the main drying area 102b and the post-drying area 102c are respectively provided with a stirring fan 60, through which the air in the furnace body 10 can be directly blown to balance the humidity and make the air heat uniform.

[0064] Optionally, the pre-drying area 102a, the main drying area 102b and the post-drying area 102c are respectively provided with a temperature measuring element 50 and a stirring fan 60. The temperature measuring element 50 and the stirring fan 60 are alternately arranged on the top of the furnace body 10 along the length direction of the furnace body 10. The overall structure is compact, which simplifies the structure of the furnace body 10 and the equipment maintenance work, and improves the stability of the equipment.

[0065] During the production process, in order to ensure that the exhaust gas in the furnace body 10 is effectively discharged, Figure 1 As shown, in one embodiment, the furnace body 10 is provided with a front end waste outlet 14 and a rear end waste outlet 15 at both ends along the conveying direction of the conveying device 20; the front end waste outlet 14 is provided with a natural exhaust valve, and / or a temperature and humidity sensor; the rear end waste outlet 15 is provided with a natural exhaust valve, and / or a temperature and humidity sensor, and / or a variable frequency waste exhaust fan.

[0066] Among them, the natural exhaust valve is a valve or system component that realizes the exhaust function through natural pressure difference (such as thermal pressure and wind pressure); the natural exhaust valve can adjust the opening according to the natural pressure difference and prevent backflow. The temperature and humidity sensor is used to detect the temperature and humidity at the front end waste outlet 14 or the rear end waste outlet 15. It senses the temperature and humidity changes in the environment and converts them into electrical signals for reading and processing by computers, control systems or other devices. Temperature and humidity sensors include but are not limited to resistive temperature and humidity sensors, capacitive temperature and humidity sensors, thermistor temperature and humidity sensors or other types of temperature and humidity sensors, etc. The variable frequency exhaust fan is mainly based on the power conversion technology of the frequency converter. The frequency converter changes the frequency of the motor power input to change the speed of the motor. When the motor speed changes, the air volume and air pressure of the fan will also be adjusted accordingly, so that the fan can more accurately meet different waste discharge requirements, improve energy efficiency and equipment life. The variable frequency exhaust fan can be manually controlled or automatically controlled as needed.

[0067] Compared with the equipment using circulating wind resistance heating, infrared heating is mainly radiation absorption heating. Optionally, in one embodiment, the conventional exhaust fan at the front exhaust outlet 14 of the equipment is eliminated. At the same time, in order to ensure the discharge of water vapor and exhaust gas, a manually controllable variable frequency exhaust fan is installed at the rear exhaust outlet 15. Natural exhaust valves with adjustable openings to prevent backflow and temperature and humidity sensors are added to the exhaust outlets at the front and rear ends of the equipment. When the equipment is running, the current exhaust volume, temperature, and humidity of the front exhaust outlet 14 and the rear exhaust outlet 15 can be monitored, and the fan and air valve opening can be manually adjusted. The exhaust volume, temperature, and humidity thresholds can also be manually set, and the fan and air valve opening can be dynamically and automatically adjusted to adjust the exhaust volume, thereby reducing unnecessary energy waste.

[0068] like Figure 1 and Figure 4 As shown, in one embodiment, the continuous immersion drying equipment 100 also includes a slag collecting device 70 provided in the immersion area 101, the slag collecting device 70 includes a slag collecting funnel 71 open at the top and bottom, and a slag collecting plate 72 detachably provided at the bottom of the slag collecting funnel 71, the slag collecting device 70 is located on one side of the immersion device 30, and is used to receive the residue dripping from the surface of the workpiece after immersion treatment.

[0069] In this embodiment, the slag collecting device 70 can be positioned adjacent to the immersion device 30. The conveying device 20 conveys a workpiece (e.g., a stator) into the immersion device 30 for immersion (e.g., paint dipping). The workpiece is then moved to the upper area of ​​the slag collecting device 70. Residue on the workpiece surface (e.g., paint residue) drips into the slag collecting hopper 71 and ultimately onto the slag collecting pan 72. The infrared radiation heating device continuously radiates the interior of the furnace. To reduce the fire hazard and energy waste caused by paint residue accumulation in the equipment, the slag collecting pan 72 is detachably connected to the slag collecting hopper 71, allowing for easy and timely removal, cleaning, and replacement of the slag collecting pan 72.

[0070] In order to further simplify the disassembly and installation of the slag receiving tray 72, optionally, the slag receiving tray 72 and the slag receiving funnel 71 adopt a drawer-type detachable structure. For example, drawer grooves are respectively provided on both sides of the slag receiving funnel 71, and the two sides of the slag receiving tray 72 can be slidably arranged in the drawer grooves. When the slag receiving tray 72 needs to be disassembled, it is only necessary to pull the slag receiving tray 72 out of the slag receiving funnel 71. During assembly, the slag receiving tray 72 can be inserted into the drawer groove of the slag receiving funnel 71.

[0071] In order to facilitate the cleaning of the slag receiving funnel 71, Figure 4As shown, further, in one embodiment, the slag receiving funnel 71 has a plurality of side panels 711 for enclosing and forming a funnel cavity, and at least some of the side panels 711 are removable side panels 711. When the slag receiving funnel 71 needs to be cleaned, the removable side panels 711 can be removed individually for cleaning, and more space can be made to clean other parts of the slag receiving funnel 71. Optionally, each side panel 711 of the slag receiving funnel 71 is a removable side panel 711, so that each side panel 711 of the slag receiving funnel 71 can be removed and cleaned.

[0072] Based on the further standardization of production products, on the basis of the above embodiment, as Figure 1 As shown, in one embodiment, the immersion device 30 includes a lifting mechanism 31 and an immersion tank 32 drivingly connected to the lifting mechanism 31, and the lifting mechanism 31 is used to drive the immersion tank 32 to adjust the height to at least two fixed gears.

[0073] In this embodiment, the immersion tank 32 is driven to be raised and lowered by the lifting mechanism 31, so that the immersion device 30 can be suitable for immersion processing of workpieces (or products) of different models. In addition, unlike the conventional stepless adjustment of the immersion tank 32, in this solution, based on the further standardization of the production products, the lifting and lowering of the immersion tank 32 is adjusted to several fixed gear heights, for example, it can be a fixed two-gear height, or a fixed three-gear height, etc., and each gear height can be customized. The continuous immersion drying equipment 100 may also include a control panel, which is electrically connected to the lifting mechanism 31, and the control panel can be set to switch different gear heights with one button. In this way, when the gear is adjusted, the workpiece (or product) to be processed can be quickly switched to the gear height suitable for immersion in one step, which can shorten the gear adjustment time and reduce the frequency of adjustment of the lifting mechanism 31, avoiding frequent adjustment of the lifting mechanism 31 and affecting the service life. Among them, the lifting mechanism 31 includes but is not limited to the use of a drive motor and a transmission structure such as a gear rack, a nut screw to achieve the lifting and lowering adjustment of the paint immersion tank.

[0074] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A continuous immersion drying device, characterized in that: include: A furnace body, wherein an immersion area and a drying area are provided in the furnace body; A conveying device, provided in the furnace body, for transferring the workpiece between the immersion area and the drying area; an immersion device, provided in the immersion area, for immersing the workpiece in the immersion area; as well as an infrared radiation device, disposed in the drying area, for performing infrared radiation heating on the workpieces in the drying area; The infrared radiation device includes radiation modules disposed on opposite sides of the furnace body along the radiation direction, each of the radiation modules includes a radiation plate for radiating infrared rays; The drying area includes a pre-drying area, a main drying area and a post-drying area, and the conveying device is used to convey the workpiece from the pre-drying area to the immersion area, and then to the main drying area and the post-drying area in sequence; The number of radiation panels provided in the pre-drying area is smaller than the number of radiation panels provided in the post-drying area, and the number of radiation panels provided in the post-drying area is smaller than the number of radiation panels provided in the main drying area.

2. The continuous immersion drying equipment according to claim 1, characterized in that The furnace body has a first side wall and a second side wall opposite to each other in the radiation direction of the infrared radiation device; At least the inner wall surfaces of the first side wall and the second side wall corresponding to the drying area are set as smooth surfaces; or, at least the inner sides of the first side wall and the second side wall corresponding to the drying area are provided with smooth panels.

3. The continuous immersion drying equipment according to claim 1, characterized in that: The radiation plate is used to radiate medium and long wave infrared rays; and / or the surface temperature of the radiation plate in a working state is 200° C. to 450° C.

4. The continuous immersion drying equipment according to claim 1, characterized in that The infrared radiation device further includes a mounting frame, the radiation module includes a plurality of radiation panels, and the radiation module is detachably mounted on the mounting frame; And / or, the infrared radiation device further comprises a protective cover arranged outside the radiation plate, the protective cover having a through hole for the radiation plate to radiate infrared rays toward the drying area; And / or, each of the radiation modules is independently connected to a power-off protection switch.

5. The continuous immersion drying equipment according to claim 1, characterized in that: The pre-drying area and the main drying area are respectively arranged on both sides of the immersion area in the horizontal direction, and the post-drying area is arranged on one side of the immersion area in the vertical direction; The conveying device is used to circulate the workpiece along a circular route including the pre-drying area, the immersion area, the main drying area, the post-drying area, and the pre-drying area.

6. The continuous immersion drying equipment according to claim 1, characterized in that: The pre-drying area, the main drying area and the post-drying area are respectively provided with temperature measuring elements; And / or, the pre-drying area, the main drying area and the post-drying area are respectively provided with a stirring fan.

7. The continuous immersion drying equipment according to claim 1, characterized in that: The furnace body is provided with a front waste discharge port and a rear waste discharge port at both ends along the conveying direction of the conveying device respectively; The front exhaust port is provided with a natural exhaust valve and / or a temperature and humidity sensor; The rear end exhaust port is provided with a natural exhaust valve, and / or a temperature and humidity sensor, and / or a variable frequency exhaust fan.

8. The continuous immersion drying equipment according to claim 1, characterized in that: The continuous immersion drying equipment also includes a slag collecting device arranged in the immersion area, the slag collecting device includes a slag collecting funnel open at the top and bottom, and a slag collecting plate detachably arranged at the bottom of the slag collecting funnel. The slag collecting device is located on one side of the immersion device and is used to receive the residue dripping from the surface of the workpiece after immersion treatment.

9. The continuous immersion drying equipment according to claim 8, characterized in that: The slag receiving funnel has a plurality of side panels for enclosing and forming a funnel cavity, and at least some of the side panels are detachable.

10. The continuous immersion drying equipment according to any one of claims 1 to 9, characterized in that: The immersion device includes a lifting mechanism and an immersion tank drivingly connected to the lifting mechanism, and the lifting mechanism is used to drive the immersion tank to adjust the height of at least two fixed gears.

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