A hot air drying conveyor line

Abstract

The present invention discloses a hot air drying conveyor line, comprising a conveying component and a drying component, wherein the conveying component comprises a power conveyor belt; the drying component comprises a drying box, a blowing box, a return air box, and a hot air circulation pipeline, wherein the drying box is provided with a transversely extending conveying channel, the power conveyor belt is arranged along the conveying channel, the blowing box is arranged in the conveying channel and is located at the bottom side of the power conveyor belt, the blowing box is provided with a plurality of blowing ports arranged at intervals along the conveying channel, the top side of the drying box is provided with a plurality of return air ports distributed at intervals along the conveying channel, the plurality of return air ports are connected to the return air box, and the hot air circulation pipeline is connected between the blowing box and the return air box. The present invention can improve the efficiency of drying and the quality of workpiece drying, and the present invention relates to the technical field of workpiece conveying and drying.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece conveying and cleaning, and in particular to a hot air drying conveying line. Background Art

[0002] In the process of workpiece cleaning, it is generally necessary to dry the cleaned workpiece to remove water on the surface of the workpiece. Now, the workpieces on the conveyor line are generally dried through a drying box device, but the current drying box device blows the heated hot air directly into the drying box body. Now, air outlets are generally opened on the side walls of the drying box body, and the air outlets are connected to the air ducts. Due to the limitation of installation space, it is difficult to distribute too many air outlets on the side walls of the drying box body, resulting in uneven flow of hot air in the drying box body during actual operation, the existence of flow dead zones, and a large drop in the power of blowing and returning air along the conveying direction of the drying box body, which makes it easy for uneven temperature to occur inside the drying box body, and also reduces the drying efficiency. For some workpieces that are sensitive to temperature, it is difficult to ensure the uniformity of the drying temperature, and thus it is difficult to ensure the factory quality of the workpieces. Summary of the invention

[0003] The purpose of the present invention is to provide a hot air drying conveyor line to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are:

[0005] The present invention provides a hot air drying conveying line, comprising:

[0006] conveyor components, including powered conveyor belts;

[0007] The drying assembly includes a drying box, a blow box, a return air box, and a hot air circulation pipeline. The drying box is provided with a transversely extending conveying channel. The power conveyor belt is arranged along the conveying channel. The blow box is arranged in the conveying channel and is located on the bottom side of the power conveyor belt. The blow box is provided with a plurality of blow ports arranged at intervals along the conveying channel. The top side of the drying box is provided with a plurality of return air ports distributed at intervals along the conveying channel. The plurality of return air ports are connected to the return air box. The hot air circulation pipeline is connected between the blow box and the return air box.

[0008] The beneficial effects of the hot air drying conveyor line of the present invention are:

[0009] During use, the workpiece is placed on the power conveyor belt and is conveyed along the conveying channel along the power conveyor belt. At the same time, the hot air provided by the hot air circulation pipeline enters the blowing box for distribution, and then the hot air is evenly blown into the conveying channel from multiple blowing ports to blow and dry the workpiece in transit. At the same time, the hot air circulation pipeline sucks the return air box to form a negative pressure in the return air box, and the air after drying the workpiece is sucked into the return air box from multiple return air ports, and then enters the hot air circulation pipeline for reheating and recycling. The present technology respectively arranges multiple return air ports and multiple blowing ports on the upper and lower sides of the power conveyor belt, and distributes the multiple return air ports and multiple blowing ports along the conveying channel, so that the hot air is evenly distributed inside the conveying channel. In addition, the blowing box is arranged in the conveying channel. When the hot air enters the blowing box, it can exchange heat with the air in the conveying channel. This can improve the drying efficiency and the quality of workpiece drying.

[0010] As a further improvement of the above technical solution, the bottom of the blowing box is fixed to the drying box, gaps are provided on both outer walls of the blowing box and both inner walls of the conveying channel, the blowing outlet is divided into a top blowing outlet located on the top wall of the blowing box and side blowing outlets located on both outer walls of the blowing box, and an air inlet connected to the hot air circulation pipeline is provided at the center of the bottom of the blowing box.

[0011] During drying, the hot air provided by the hot air circulation pipeline enters the blowing box from the air inlet at the bottom center of the blowing box, so that the blowing outlets at both ends of the blowing box can have the same air outlet effect, thereby improving the uniformity of blowing. In addition, the hot air in the blowing box is blown into the conveying channel from the side blowing outlets on both sides and the top blowing outlet on the top side, thereby increasing the flow area of ​​the hot air, thereby increasing the air volume, expanding the blowing range, and expanding the blowing range on the bottom side of the power conveyor belt. The hot air blown out from the top blowing outlet directly blows toward the bottom of the power conveyor belt, and the hot air blown out from the side blowing outlets on both sides can blow the side edges of the power conveyor belt, so that a large amount of hot air blows through the power conveyor belt from bottom to top to cover the workpieces on the power conveyor belt. The power conveyor belt generally adopts a chain conveyor belt.

[0012] As a further improvement of the above technical solution, the top blowing air outlet is provided with a top air guide plate inclined outward, and one edge of the top air guide plate is connected to the edge of the top blowing air outlet so that the top blowing air outlet blows air upward along the conveying channel, and the side blowing air outlet is provided with a side air guide plate inclined outward, and the lower edge of the side air guide plate is connected to the lower edge of the side blowing air outlet so that the side blowing air outlet blows air upward.

[0013] The top blowing tuyere of this solution is provided with a top air deflector to direct the hot air on the top side, so that the hot air on the top side is mainly blown out obliquely along the extending direction of the conveying channel. It can be understood that through the top air deflector, the hot air on the top side can be blown obliquely towards the direction of workpiece conveying, and the hot air on the top side also blows out from both sides between the top air deflector and the top blowing tuyere. At the same time, the side air deflector is used to direct the hot air on the side, so that the hot air is blown out obliquely upwards. Through the side air deflector, the hot air on the side can be blown obliquely towards both sides of the workpiece conveying, and the hot air on the side also blows out from both sides between the side air deflector and the side blowing tuyere, improving the mixing effect of the hot air in the conveying channel and further improving the drying efficiency.

[0014] As a further improvement of the above technical solution, the inclination angles of the top air deflector and the side air deflector are both adjustable. During actual use, according to the actual drying requirements, mainly considering the size and quantity of the workpieces, the inclination angles of the top air deflector and the side air deflector can be adjusted to adjust the air volume and mixing degree of the hot air.

[0015] As a further improvement of the above technical solution, the forming method of the top air deflector and the side air deflector is to cut out a "U"-shaped cut groove on the box wall of the blowing box, and bend the area surrounded by the cut groove outwards at a preset angle.

[0016] The top air deflector and the side air deflector in this solution are formed by cutting and bending processes in the blowing box. The blowing box is generally made of steel plates. When processing the blowing tuyere, a "U"-shaped cut groove is pre-cut on the box wall of the blowing box, and then the area surrounded by the cut groove is bent outwards to form the corresponding top air deflector and side air deflector. The top air deflector matches the shape and size of the top blowing tuyere. At this time, the air outlet gap of the top hot air is the gap formed between the three side edges of the top air deflector and the three inner edges of the top blowing tuyere, while the side air deflector matches the shape and size of the side blowing tuyere. At this time, the air outlet gap of the side hot air is the gap formed between the three side edges of the side air deflector and the three inner edges of the side blowing tuyere.

[0017] During the use process, the bending angles of the top air deflector and the side air deflector can be adjusted by an external force to adjust the inclination angles of the top air deflector and the side air deflector.

[0018] As a further improvement of the above technical solution, the blowing box is provided with multiple blowing sections along the conveying channel, and the blowing directions of the top blowing tuyeres between two adjacent blowing sections are arranged in opposite directions.

[0019] In order to further improve the effect of hot air mixing in the conveying channel, the present scheme sets the top blowing outlets between two adjacent blowing sections to be relatively arranged. It can be understood that the top air guide plates on the top blowing outlets are reversed, one of the top air guide plates is bent in the direction of the workpiece incoming material, and the other top air guide plate is bent in the direction of the workpiece outgoing material, so that two streams of hot air that blow against each other in an interlaced manner can be formed at the top of the blowing box.

[0020] As a further improvement of the above technical solution, the return air box is installed on the top side of the drying box along the conveying channel, and an air outlet connected to the hot air circulation pipeline is provided in the middle of the return air box;

[0021] The dried air flows back to the return air box through multiple return air ports, and the hot air circulation pipeline increases the suction force of the return air box through the air outlet. This makes the suction capacity of the return air ports on both ends of the return air box the same, thereby improving the uniformity of hot air blowing and drying in the conveying channel.

[0022] The hot air circulation pipeline includes a circulating air duct, a fan and a heating module installed in the circulating air duct in sequence, the circulating air duct includes a vertical air duct located on the side of the drying box, a return air duct and an air inlet duct respectively connected horizontally to the upper and lower ends of the vertical air duct, the return air duct is connected to the air outlet, the air inlet duct is connected to the air inlet, the top surface of the vertical air duct is provided with an installation port, and the heating module is detachably suspended vertically in the vertical air duct through the installation port.

[0023] This solution uses a fan as the power for air circulation and heats the air through a heating module to achieve hot air circulation drying. The air in the return air box enters the return air duct through the air outlet, and passes through the return air duct, vertical air duct and air inlet duct in turn, and is heated by the heating module. The hot air then enters the blow box from the air inlet.

[0024] Regarding the installation of the heating module, this solution allows it to be detachably installed into the vertical air duct from the installation port on the top surface of the vertical air duct, and the heating module is suspended in the vertical air duct. In this way, it can be arranged and installed following the direction of wind flow to reduce wind resistance. Secondly, water during the drying process can be collected downward along the vertical air duct to avoid affecting the heating efficiency of the heating module.

[0025] As a further improvement of the above technical solution, the heating module includes a fixing seat detachably fitted with the mounting opening, and a plurality of heating tubes vertically installed at the bottom of the fixing seat.

[0026] In this solution, the wind is heated by a plurality of heating tubes, and the plurality of heating tubes are connected with a fixing seat to form a modular structure, which is convenient for assembly.

[0027] As a further improvement of the above technical solution, abutment steps are provided around the top of the fixing seat, the abutment steps abut against the upper edge of the mounting port, the abutment steps are provided with a plurality of through holes, and a plurality of studs are provided around the mounting port, and the studs pass through the through holes one by one and are threadedly connected with nuts.

[0028] During installation, after the fixing seat is inserted into the installation opening, the abutting step abuts against the upper edge of the installation opening to achieve positioning, and then the nut is threadedly connected to the stud, which is convenient for disassembly and assembly.

[0029] As a further improvement of the above technical solution, a drain outlet is provided at the bottom end of the vertical air duct.

[0030] During the drying process, the water is collected downward along the vertical air duct and then discharged from the drain port at the bottom of the vertical air duct.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0034] Figure 1 This is a structural schematic diagram of an embodiment of the hot air drying conveyor line provided by the present invention;

[0035] Figure 2 This is a top view of an embodiment of the hot air drying conveyor line provided by the present invention;

[0036] Figure 3 yes Figure 2 Sectional view of section AA;

[0037] Figure 4 yes Figure 2 Sectional view of the middle BB section;

[0038] Figure 5 yes Figure 4 A partial enlarged view of part C in the middle;

[0039] Figure 6 This is a structural schematic diagram of an embodiment of a blow box provided by the present invention;

[0040] Reference numerals:

[0041] Power conveyor belt 100;

[0042] Drying box 200; conveying channel 210; supporting legs 220; supporting slats 230; return air outlet 240;

[0043] Blowing box 300; top blowing air outlet 310; top air guide plate 311; side blowing air outlet 320; side air guide plate 321; air inlet 330;

[0044] Return air box 400; air outlet 410;

[0045] Hot air circulation pipeline 500; circulating air duct 510; return air duct 511; vertical air duct 512; installation port 5121; stud 5122; nut 5123; drainage port 5124; air inlet duct 513; fan 520; heating module 530; fixing seat 531; heating tube 532; abutting step 533. DETAILED DESCRIPTION

[0046] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0047] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0049] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0050] Reference Figure 1 to Figure 6 The hot air drying conveyor line of the present invention is implemented as follows:

[0051] The hot air drying conveyor line of this embodiment includes a conveying component and a drying component.

[0052] like Figure 1As shown, the conveying assembly includes a power conveyor belt 100, which is used to convey workpieces. When in use, the workpieces are placed on the power conveyor belt 100, and then the power conveyor belt 100 drives the workpieces to be conveyed to the drying assembly to achieve drying and conveying.

[0053] The conveying assembly generally also includes a pulley driving structure for driving the power conveyor belt 100 to move in a circular motion. If the power conveyor belt 100 is an existing conventional circulating conveyor belt, those skilled in the art know the specific structure.

[0054] In order to improve the efficiency of drying the workpiece, the power conveyor belt 100 of the present embodiment adopts a chain conveyor belt, which can reduce the contact area between the power conveyor belt 100 and the workpiece, thereby increasing the contact area between the workpiece and the hot air, thereby improving the drying efficiency.

[0055] like Figure 1 and Figure 2 As shown, the power conveyor belt 100 of this embodiment conveys along the front-to-back direction. In some other embodiments, the power conveyor belt 100 can convey along the left-right direction or other directions, depending on the actual conveying requirements. This embodiment takes the power conveyor belt 100 along the front-to-back direction as an example, and other conveying directions are not described in detail.

[0056] like Figure 1 As shown, the drying component of the embodiment of the present invention includes a drying box 200, a blowing box 300, a return air box 400 and a hot air circulation pipeline 500, wherein the drying box 200 is provided with a conveying channel 210 extending transversely front to back, the conveying channel 210 runs through the front and rear ends of the drying box 200, and the power conveyor belt 100 passes through the drying box 200 along the conveying channel 210. A plurality of legs 220 are provided at the bottom of the drying box 200 to erect the drying box 200, wherein the legs 220 can adopt a height-adjustable telescopic rod structure, so that the height of the drying box 200 can be adjusted according to different installation requirements.

[0057] like Figure 4 As shown, in order to improve the transportation stability and carrying capacity of the power conveyor belt 100, support slats 230 are provided on both sides of the conveying channel 210. The support slats 230 extend in the front-to-back direction, and the bottom of the left and right sides of the power conveyor belt 100 are overlapped on the support slats 230.

[0058] The blow box 300 of this embodiment is arranged in the conveying channel 210, and the blow box 300 is also extended in the front-to-back direction, and the blow box 300 is arranged at the bottom of the power conveyor belt 100. The blow box 300 is provided with a plurality of blowing ports, and the plurality of blowing ports are arranged at intervals in the front-to-back direction, and the plurality of blowing ports are connected to the conveying channel 210.

[0059] A plurality of return air ports 240 are disposed on the top side of the drying box 200 . The plurality of return air ports 240 are spaced apart and distributed along the conveying passage 210 . The plurality of return air ports 240 are connected to the return air box 400 .

[0060] The hot air circulation pipeline 500 is connected between the blowing box 300 and the return air box 400, and the hot air circulation pipeline 500 realizes the circulation and heating of the hot air. The hot air circulation pipeline 500 includes a circulation air duct 510 connected between the blowing box 300 and the return air box 400, and a fan 520 and a heating module 530 installed in the circulation air duct 510 in sequence. The fan 520 is used as the power for air circulation, and the air is heated by the heating module 530.

[0061] When in use, the workpiece is placed on the powered conveyor belt 100 and is conveyed along the conveying channel 210 along the powered conveyor belt 100. At the same time, the hot air provided by the hot air circulation pipeline 500 enters the blowing box 300 for distribution, and then the hot air is evenly blown into the conveying channel 210 from multiple blowing ports to blow and dry the workpiece being conveyed. At the same time, the hot air circulation pipeline 500 sucks the return air box 400 to form a negative pressure in the return air box 400, and the air after drying the workpiece is sucked into the return air box 400 from multiple return air ports 240, and then enters the hot air circulation pipeline 500 for reheating and recycling.

[0062] The present invention arranges multiple return air ports 240 and multiple blowing ports on the upper and lower sides of the power conveyor belt 100, respectively, and distributes the multiple return air ports 240 and multiple blowing ports along the conveying channel 210, so that the hot air is evenly distributed along the inside of the conveying channel 210. In addition, the blow box 300 is arranged in the conveying channel 210. When the hot air enters the blow box 300, it can exchange heat with the air in the conveying channel 210. This can improve the drying efficiency and the quality of the workpiece drying.

[0063] The blowing box 300 is made of a steel box body and has good thermal conductivity.

[0064] Furthermore, if Figure 3 and 4 As shown, the bottom of the blowing box 300 is fixed to the drying box 200, and there are gaps between the left and right outer walls of the blowing box 300 and the left and right inner walls of the conveying channel 210. Figure 6 As shown, the air outlet is divided into a top air outlet 310 and a side air outlet 320, wherein the top air outlet 310 is arranged on the top wall of the blowing box 300, and the side air outlet 320 is arranged on the two outer side walls of the blowing box 300, and an air inlet 330 is arranged at the center of the bottom of the blowing box 300, and the air inlet 330 is connected to the circulating air duct 510, and a avoidance position corresponding to the air inlet 330 is opened at the bottom of the drying box 200 for the circulating air duct 510 to pass through.

[0065] During drying, the hot air provided by the circulating air duct 510 enters the blowing box 300 from the air inlet 330 at the bottom center of the blowing box 300, so that the air outlets at both ends of the blowing box 300 have the same air outlet effect, thereby improving the uniformity of blowing.

[0066] In addition, the hot air in the blowing box 300 is blown into the conveying channel 210 from the side blowing ports 320 on the left and right sides and the top blowing port 310 on the top side, thereby increasing the flow area of ​​the hot air, thereby increasing the air volume and expanding the blowing range, so that the blowing range on the bottom side of the power conveyor belt 100 is expanded, and the hot air blown out from the top blowing port 310 is directly blown toward the bottom of the power conveyor belt 100, and the hot air blown out from the side blowing ports 320 on the left and right sides can blow the side edges of the power conveyor belt 100, so that a large amount of hot air is blown from bottom to top through the power conveyor belt 100 to cover the workpieces on the power conveyor belt 100. The power conveyor belt 100 generally adopts a chain conveyor belt.

[0067] like Figure 6 As shown, the top blowing air outlet 310 of the present embodiment is provided with a top air guide plate 311 inclined outward, and one edge of the top air guide plate 311 is connected to the edge of the top blowing air outlet 310, so that the top blowing air outlet 310 blows air upward along the conveying channel 210, and the side blowing air outlet 320 is provided with a side air guide plate 321 inclined outward, and the lower edge of the side air guide plate 321 is connected to the lower edge of the side blowing air outlet 320, so that the side blowing air outlet 320 blows air upward.

[0068] In this embodiment, a top air guide plate 311 is provided to guide the hot air on the top side, so that the hot air on the top side is mainly blown out upward along the direction in which the conveying channel 210 extends. It can be understood that Figure 6 As shown, the top air guide plate 311 can make the hot air on the top side blow in the direction of workpiece conveying, and the hot air on the top side is also blown out from both sides between the top air guide plate 311 and the top blowing port 310; at the same time, the side hot air is guided by the side air guide plate 321, so that the hot air is blown out in an upward direction, as shown in FIG. Figure 6 As shown, the side air guide plate 321 can be used to make the hot air on the side be blown obliquely toward the two sides of the workpiece conveying, and the hot air on the side is also blown out from both sides between the side air guide plate 321 and the side blowing port 320, thereby improving the mixing effect of the hot air in the conveying channel 210 and further improving the drying efficiency.

[0069] In addition, the inclination angles of the top air guide plate 311 and the side air guide plate 321 of this embodiment are adjustable. In actual use, the inclination angles of the top air guide plate 311 and the side air guide plate 321 can be adjusted according to the actual drying needs, mainly considering the size and number of workpieces, to adjust the hot air outlet volume and the degree of mixed flow.

[0070] In some other embodiments, the top air deflector 311 and the side air deflector 321 can be adjustably installed through hinge members. In this embodiment, the top air deflector 311 and the side air deflector 321 are formed by cutting out a "U"-shaped cutting groove on the box wall of the air blowing box 300, and then bending the area surrounded by the cutting groove outward at a preset angle to form an air deflector structure.

[0071] It can be understood that this embodiment is formed by cutting and bending the air blowing box 300. The air blowing box 300 is generally made of steel plate. When processing the air blowing port, a "U"-shaped cutting groove is pre-cut on the box wall of the air blowing box 300, and then the area surrounded by the cutting groove is bent outward to form the corresponding top air deflector 311 and side air deflector 321. The top air deflector 311 matches the shape and size of the top air blowing port 310. At this time, the air outlet gap of the top hot air is the gap formed between the three side edges of the top air deflector 311 and the three inner edges of the top air blowing port 310, while the side air deflector 321 matches the shape and size of the side air blowing port 320. At this time, the air outlet gap of the side hot air is the gap formed between the three side edges of the side air deflector 321 and the three inner edges of the side air blowing port 320.

[0072] During use, an external force can be used to掰动 (it should be "bend" in English) the top air deflector 311 and the side air deflector 321 to adjust the tilt angles of the top air deflector 311 and the side air deflector 321.

[0073] In other embodiments, the top air deflector 311 and the side air deflector 321 can be of other shapes. The top air deflector 311 and the side air deflector 321 in this embodiment are both rectangular plate-shaped, and then a "U"-shaped cutting groove is cut. In other embodiments, a cutting groove of a shape can be cut.

[0074] Such as Figure 3 As shown, in order to further improve the mixing effect of the hot air in the conveying channel 210, the air blowing box 300 is provided with multiple blowing sections along the conveying channel 210. The blowing directions of the top air blowing ports 310 between adjacent two blowing sections are arranged in opposite directions. It can be understood that the top air deflector 311 on the top air blowing port 310 is reversed, one of the top air deflectors 311 is bent in the direction of the workpiece incoming material, and the other top air deflector 311 is bent in the direction of the workpiece outgoing material, so that two hot air flows blowing against each other alternately can be formed at the top of the air blowing box 300.

[0075] Regarding the installation method of the return air box 400, the return air box 400 of this embodiment is installed on the top side of the drying box 200 along the conveying channel 210, and an air outlet 410 connected to the hot air circulation pipeline 500 is provided in the middle of the return air box 400, and an inlet connected to the return air port 240 is provided at the bottom of the return air box 400. The dried air flows back to the return air box 400 through multiple return air ports 240, and the hot air circulation pipeline 500 increases the suction force of the return air box 400 through the air outlet 410. In this way, the suction capacity of the return air ports 240 at both ends of the return air box 400 can be the same, thereby improving the uniformity of hot air blowing and drying in the conveying channel 210.

[0076] like Figure 1 and 4 As shown, the circulating air duct 510 includes a return air duct 511, a vertical air duct 512 and an air inlet duct 513 which are connected in sequence. The vertical air duct 512 is vertically installed on the side of the drying box 200. The return air duct 511 and the air inlet duct 513 are both extended horizontally. The return air duct 511 and the air inlet duct 513 are respectively connected to the sides of the upper and lower ends of the vertical air duct 512. The return air duct 511 is connected to the air outlet 410, and the air inlet duct 513 is connected to the air inlet 330. The fan 520 is installed between the return air duct 511 and the air outlet 410, and the heating module 530 is installed in the vertical air duct 512. The air in the return air box 400 enters the return air duct 511 through the air outlet 410, and passes through the return air duct 511, the vertical air duct 512 and the air inlet duct 513 in sequence, and is heated by the heating module 530. Then the hot air enters the blowing box 300 from the air inlet 330.

[0077] Regarding the installation method of the heating module 530, an installation port 5121 is provided on the top surface of the vertical air duct 512, and the heating module 530 is detachably suspended vertically in the vertical air duct 512 through the installation port 5121. In this way, on the one hand, it can be arranged and installed following the direction of wind flow to reduce wind resistance, and on the other hand, water during the drying process can be gathered downward along the vertical air duct 512 to avoid affecting the heating efficiency of the heating module 530.

[0078] like Figure 5 As shown, the heating module 530 includes a fixing seat 531 detachably fitted with the mounting port 5121, and a plurality of heating tubes 532 vertically mounted at the bottom of the fixing seat 531. The wind is heated by the plurality of heating tubes 532, and the plurality of heating tubes 532 are connected together with the fixing seat 531 to form a modular structure for easy assembly.

[0079] In addition, abutment steps 533 are arranged around the top of the fixing seat 531, and the abutment steps 533 abut against the upper edge of the installation opening 5121. The abutment steps 533 are provided with multiple through holes. The installation opening 5121 is provided with multiple studs 5122 around it. The studs 5122 pass through the through holes one by one and are threadedly connected with nuts 5123.

[0080] During installation, after the fixing seat 531 is inserted into the installation opening 5121, the abutting step 533 abuts against the upper edge of the installation opening 5121 to achieve positioning, and then the nut 5123 is threadedly connected to the stud 5122, which is convenient for disassembly and assembly.

[0081] In this embodiment, a drain port 5124 is provided at the bottom end of the vertical air duct 512 . Water collected during the drying process flows downward along the vertical air duct 512 and is then discharged from the drain port 5124 at the bottom end of the vertical air duct 512 .

[0082] In this embodiment, the drain outlet 5124 is arranged at the lowest point of the air duct, so that water generated in both blowing air and returning air can be collected in the drain outlet 5124 .

[0083] The working principle of the hot air drying conveyor line of the embodiment of the present invention is:

[0084] like Figure 3 and Figure 4 As shown, the workpiece is placed on the power conveyor belt 100, and is conveyed along the conveying channel 210 along the power conveyor belt 100. At the same time, the heating pipe 532 and the fan 520 are powered on and started. Under the operation of the fan 520, the wind passes through the return air duct 511, the vertical air duct 512 and the air inlet duct 513 in sequence. When passing through the vertical air duct 512, the wind is heated by the heating pipe 532, and then the hot air enters the blowing box 300 from the air inlet 330 for uniform distribution, and then the hot air in the blowing box 300 is blown into the conveying channel 210 from the side blowing ports 320 on both sides and the top blowing port 310 on the top side to dry the workpiece;

[0085] During drying, the top air guide plate 311 can be used to make the hot air on the top side blow obliquely toward the direction in which the workpiece is conveyed, and the hot air on the top side is also blown out from both sides between the top air guide plate 311 and the top air outlet 310. At the same time, the side air guide plates 321 are used to guide the hot air on the side so that the hot air is blown out obliquely upward. The side air guide plates 321 can be used to make the hot air on the side side blow obliquely toward both sides in which the workpiece is conveyed, and the hot air on the side side is also blown out from both sides between the side air guide plates 321 and the side air outlet 320.

[0086] At the same time, the fan 520 sucks the return air box 400 to form a negative pressure in the return air box 400, and the air after drying the workpiece is sucked into the return air box 400 from the multiple return air ports 240, and then enters the return air duct 511 to be reheated and recycled.

[0087] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A hot air drying conveyor line, characterized in that: Comprising: A conveying assembly, including a power conveyor belt; A drying assembly, including a drying box, a blowing box, a return air box, and a hot air circulation pipeline. The drying box is provided with a horizontally extending conveying channel. The power conveyor belt is arranged along the conveying channel. The blowing box is arranged in the conveying channel and located on the bottom side of the power conveyor belt. The blowing box is provided with a plurality of air outlets arranged at intervals along the conveying channel. The top side of the drying box is provided with a plurality of return air openings distributed at intervals along the conveying channel. The plurality of return air openings are communicated with the return air box. The hot air circulation pipeline is connected between the blowing box and the return air box; The bottom of the blowing box is fixed to the drying box. There are gaps between the two outer side walls of the blowing box and the two inner side walls of the conveying channel. The air outlets are divided into top air outlets located on the top wall of the blowing box and side air outlets located on the two outer side walls of the blowing box. The center of the bottom of the blowing box is provided with an air inlet connected to the hot air circulation pipeline; The top air outlet is provided with a top air guiding plate that inclines outward. One edge of the top air guiding plate is connected to the edge of the top air outlet, so that the top air outlet blows air upward along the conveying channel. The side air outlet is provided with a side air guiding plate that inclines outward. The lower edge of the side air guiding plate is connected to the lower edge of the side air outlet, so that the side air outlet blows air upward; The inclination angles of the top air guiding plate and the side air guiding plate are both adjustable; The forming method of the top air guiding plate and the side air guiding plate is to cut out a "凵"-shaped cutting groove on the box wall of the blowing box, and bend the area surrounded by the cutting groove outward at a preset angle; The blowing box is provided with multiple blowing sections along the conveying channel. The blowing directions of the top air outlets between two adjacent blowing sections are arranged in opposite directions.

2. The hot air drying and conveying line according to claim 1, characterized in that: The return air box is installed on the top side of the drying box along the conveying channel. The middle part of the return air box is provided with an air outlet connected to the hot air circulation pipeline; The hot air circulation pipeline includes a circulation air duct, a blower and a heating module sequentially installed in the circulation air duct. The circulation air duct includes a vertical air duct on the side of the drying box, a return air duct and an air inlet duct respectively horizontally connected to the upper end and the lower end of the vertical air duct. The return air duct is connected to the air outlet, the air inlet duct is connected to the air inlet, the top surface of the vertical air duct is provided with an installation opening, and the heating module is vertically suspended in the vertical air duct detachably through the installation opening.

3. The hot air drying and conveying line according to claim 2, characterized in that: The heating module includes a fixing seat detachably sleeved with the installation opening and a plurality of heating tubes vertically installed at the bottom of the fixing seat.

4. The hot air drying and conveying line according to claim 3, characterized in that: There are abutting steps around the top of the fixing seat. The abutting steps abut against the upper edge of the installation opening. The abutting steps are provided with a plurality of through holes. There are a plurality of studs around the installation opening. The studs pass through the through holes one by one and are threadedly connected with nuts.

5. The hot air drying conveyor line according to claim 2, characterized in that: A drain outlet is provided at the bottom end of the vertical air duct.

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