A coating drying hot air box

Abstract

The present invention discloses a coating drying hot air box, which relates to the technical field of coating dryers. The coating drying hot air box includes: a plurality of drying units are arranged vertically and the adjacent units are set up in a suspended manner. Each drying unit is provided with a hot air guiding plate, left and right wedge-shaped cavities, a drying cavity, a heat preservation layer, a suspended connection unit, etc. A temperature transmitter is arranged in the middle of each drying cavity. The wedge-shaped cavities are distributed on both sides of the drying cavity and are connected to the drying cavity through a perforated plate. The wedge-shaped cavities are used to guide the hot air to move upward and inward; in this coating drying hot air box, the integrated drying box is split into multiple drying units, the temperatures of the drying units are independently controlled, the adjacent drying units are connected through the suspended connection unit and the release amount of high-humidity gas is controlled, so as to realize the separate release of wet air with different humidity levels. While ensuring the upward movement of the hot air, the wedge-shaped cavity has a wind pressure in the vertical coating direction, which destroys the boundary retention effect on the coating surface and improves the drying efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of coating dryers, and particularly relates to a coating drying hot air box. Background Art

[0002] A vertical coating drying box is a device for vertically drying coated materials.

[0003] Chinese Patent Application Publication No.: CN204996665U, a vertical coater for double-sided coating of films, includes a vertical frame, an unwinding mechanism, and a winding mechanism. A coating mechanism is provided below the vertical frame, an oven furnace body is provided in the vertical frame, at least one set of heating devices is provided on the side of the oven furnace body, the hot air heating system is provided with an air inlet duct and two air inlet nozzles, and the two air inlet nozzles are respectively oppositely provided on both side surfaces of the oven furnace body. The two air inlet nozzles and the exhaust nozzle are respectively communicated with the baking furnace body and are located on both sides of the film. The structure is simple, and single-sided or double-sided coating can be flexibly selected.

[0004] The vertical drying box is divided into multiple three-dimensional cavities, and gradient drying is carried out through multiple cavities. However, the high-humidity gas in the lower cavity needs to flow through the upper cavity before it can be discharged from the top of the oven furnace body, and the high-humidity gas generated in the lower cavity cannot be discharged in time, resulting in poor drying effect. For example, in the above-mentioned patent application publication No. CN204996665U, during the drying of the coating, the moisture on the surface is carried away, and a large amount of high-humidity gas enters the continuous drying cavity in the previous section along with the coating. The influx of high-humidity gas will affect the drying of the coating and the control of the temperature in the drying cavity, reducing the quality of the coating drying; moreover, the amount of humidity gas generated per unit time and the moisture content of the humidity gas in each cavity are different, and the moisture exhaust capacity of each section of the cavity needs to be flexibly adjusted; the air inlets are mostly provided on the bottom side of the drying furnace body, and the air blows from the bottom to the top along the drying cavity, and boundary retention effect is likely to occur on the coating surface, the fluidity of the air is poor, and the drying efficiency is reduced. For example, in the above-mentioned patent application publication No. CN204996665U, the fluidity of the hot air on the coating surface in the drying cavity is weak, and the hot air cannot quickly carry away the high-humidity gas on the coating surface, reducing the drying efficiency. Coupled with the fact that the high-humidity gas cannot be discharged in time, the drying effect of the coating is even worse. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a coating drying hot air box, which splits the integrated drying box into multiple drying units, connects adjacent drying units through an overhead connection unit and controls the release amount of high-humidity gas, guides the wind direction by changing the inclination angle of the hot air guide plate in the box, reduces the hot press loss, and through the wedge-shaped structure design, guides the hot air upward and inward vertical pressure, increases the hot air disturbance on the coating surface, destroys the humidity retention layer, and improves the drying efficiency.

[0006] Technical solution: To achieve the above objectives, the present invention is realized through the following technical solutions: A coating drying hot air box, comprising: a drying unit, several drying units are distributed vertically, each drying unit is provided with a drying box, each of the drying boxes is connected to a hot air blower through a Y-shaped pipe, each drying box includes a box body, two mesh plates are arranged in the middle of each box body, a drying cavity is formed between the two mesh plates, a temperature transmitter is arranged in the middle of each drying cavity, two wedge-shaped cavities are formed in the box body and communicated with the drying cavity, the two wedge-shaped cavities are symmetrically distributed on both sides of the drying cavity, and the wedge-shaped cavities are used to guide the hot air to move upward and inward.

[0007] An overhead connection unit, adjacent drying units are connected through the overhead connection unit, the overhead connection unit includes: a top plate, a side plate, and a bottom plate integrally formed into a box body with an open side, the top of each box body is connected with several moisture absorption plates through a rotating part, each moisture absorption plate is provided with a placement box, and the moisture absorption plate is configured to control the opening area of the side of the box body under the action of rotation and remove its own moisture under the action of extrusion.

[0008] Preferably, an inlet is formed through the bottom of each box body, an outlet is formed through the top of each box body, the inlet is connected to the outlet through the drying cavity, two baffle plates are connected in each box body, the two baffle plates are symmetrically distributed on both sides of the drying cavity, one end of each baffle plate close to the inlet is connected to the mesh plate through a hot air guide plate, a wedge-shaped cavity is formed between the hot air guide plate, the mesh plate, and the baffle plate, and several ventilation holes are evenly distributed on the mesh plate.

[0009] Preferably, the included angle between the baffle plate and the mesh plate is 15-20°, the included angle between the hot air guide plate and the mesh plate is 35-40°, the distance between the baffle plate and the mesh plate gradually narrows along the longitudinal axis direction of the box body, and the distance between the top end of the baffle plate and the top end of the mesh plate is less than the distance between the bottom end of the baffle plate and the bottom end of the mesh plate.

[0010] Preferably, the Y-shaped pipe includes: a main pipe, the main pipe is connected with several branch pipes, two air boxes are symmetrically distributed on both sides of the box body, each air box is connected to the main pipe through a hot air blower, the two sides of each air box are respectively provided with a first hole, each baffle plate is provided with a second hole, the end of the branch pipe far away from the air box sequentially passes through the first hole and the second hole and is connected to the wedge-shaped cavity, the Y-shaped pipe is used to disperse the hot air in the main pipe into the branch pipes and reduce the wind pressure loss, the temperature transmitter gives a 4-20 mA signal, and the temperature transmitter adjusts the temperature of the hot air blower in real time according to the preset temperature.

[0011] Preferably, the bottom plate member is connected to the top plate through a side plate. The bottom plate is communicated with the outlet of a box body, and the top plate is communicated with the inlet of an adjacent box body. The top plate, the side plate, and the bottom plate member form a semi-circular box body. The bottom plate member includes: an arc-shaped plate, the bottom of the arc-shaped plate is connected to the top of the box body, the arc-shaped plate is a semi-circular annular plate, a liquid groove is formed at the top of the arc-shaped plate, a liquid outlet is formed through one end of the arc-shaped plate and is communicated with the liquid groove, a plurality of support plates are connected to the top of the liquid groove, a vertical plate is connected to the top of the inner edge of the middle section of the arc-shaped plate, the number of arc-shaped plates on both sides of the longitudinal axis of the vertical plate is the same, the distance between adjacent support plates on the same side of the vertical plate is d, one side of the vertical plate and one side of a support plate are in the same plane, and the distance between the other side of the vertical plate and one side of another support plate is also d. Two inner side plates are connected to the inner wall of the arc-shaped plate. A heat preservation cavity is provided between the inner wall of the box body and the baffle. A through hole is formed through the side of the side plate close to the coating, and a top hole is formed through the top of the top plate.

[0012] Preferably, a stepping motor is connected to the top of the box body. The rotating part of the stepping motor is connected to a plurality of rotating plates through a rotating shaft. The rotating plates include: a first rotating plate and a second rotating plate. The first rotating plate is a straight plate, and the second rotating plate is a curved plate. Each first rotating plate or second rotating plate is connected with a moisture absorption plate through a first connecting plate. A placement box is connected to the top of each support plate. The moisture absorption plate enters and exits the placement box under the action of rotation. The height of the vertical plate is the same as the height of the moisture absorption plate. The rotating plate is composed of a plurality of first rotating plates and one second rotating plate. The rotating plates on both sides of the longitudinal axis of the vertical plate are symmetrically distributed. The distance between the first connecting plate and the adjacent placement box is greater than the length of the moisture absorption plate.

[0013] Preferably, the placement box includes: two side plates, the bottom of the side plates is connected to the top of the support plate, a condensation plate is connected to the inner wall of one side plate, a window is formed through one side of the other side plate, a second connecting plate is arranged between the two side plates, and the two ends of the second connecting plate are integrally formed with the closer ends of the two side plates respectively. A clamping plate is connected to each end of the side plate far from the second connecting plate. Friction grooves are formed on the closer sides of the two clamping plates. The distance between the two clamping plates gradually decreases and then gradually increases along the direction of the virtual axis. The distance between the middle parts of the two clamping plates is less than the distance at any other part of the two clamping plates. The distance between the middle parts of the two clamping plates is less than the thickness of the moisture absorption plate. A placement cavity is arranged between the two side plates, and the placement cavity is adapted to the moisture absorption plate. One end of the coating enters from the inlet of the bottom box body and exits from the outlet of the top box body. Lower guide rollers and upper guide rollers are respectively arranged outside the bottom box body and the top box body. The coating is wound around the lower guide rollers and the upper guide rollers.

[0014] Preferably, the second rotating plate is an arched plate, and the second rotating plate is bent in a direction away from the coating to avoid contact between the first rotating plate and the second rotating plate during the rotation process.

[0015] Preferably, a protective plate is connected to the inlet of the box body, and the protective plate is in an inverted V shape. The top box body is connected to the middle and lower box body through a first pipe, and the middle and upper box body is connected to the bottom box body through a second pipe.

[0016] Beneficial effects: The present invention provides a coating and drying hot air box. Compared with the prior art, it has the following beneficial effects:

[0017] 1. Split the integrated drying box into multiple drying units, connect the adjacent drying units through overhead connection units and control the release of high-humidity gas. By changing the inclination angle of the hot air guide plate in the box, guide the wind direction, reduce heat pressure loss, and improve drying efficiency.

[0018] 2. The wind blows from bottom to top, and the wind forms an area on the coating surface. The gas flowability in this area is poor, and there is gas retention, which is not conducive to taking away the moisture on the coating surface. The wedge-shaped cavity is sharp-angled, and the space above the wedge-shaped cavity is getting smaller and smaller. The structure forms a large downwind and small upwind. The wind blows upward at an angle, giving the hot air a vertical partial pressure to the inner cavity, forcing the wind to blow vertically into the drying cavity, which is conducive to destroying the boundary retention effect on the coating surface. And with the hot air guide plate, the wind does not need to rush directly to the mesh plate, but moves upward along the hot air guide plate to reduce wind pressure loss.

[0019] 3. The main pipe is directly connected to the drying chamber. The wind in the pipe moves in one direction. The wind is dense and mainly concentrated in the middle of the pipe body, which is not conducive to the dispersion and uniform distribution of the wind. Therefore, by adding branch pipes, the wind in the main pipe can be dispersed to the branch pipes, reducing wind pressure loss and improving wind uniformity.

[0020] 4. In the drying chamber, hot air usually goes up, but there is disturbance in the airflow. Sometimes the hot air does not go up, and even goes down and flows out from the discharge port. The hot air blows to the lower guide roller at the bottom, causing the lower guide roller to dry easily and the lower guide roller to stick to the coating easily. For the bottom box, the protective plate is set in an inverted V shape, with a small opening at the top and a large opening at the bottom, to reduce the hot air from jumping down and reduce the impact of the hot air escaping from the inlet on the lower guide roller. For other boxes, the protective plate is set in an inverted V shape to reduce the amount of high-humidity gas from the bottom entering the upper box, reducing the interference of high-humidity gas on the drying of the upper box.

[0021] 5. The overhead connection unit is arranged between two adjacent box body parts and forms a semi-circular box body. By rotating to control the extraction amount of the moisture absorption plate from the placement box, the opening area of the arc surface of the box body is controlled, so as to adjust the moisture dissipation capacity. When there is a lot of moisture on the moisture absorption plate, the moisture absorption plate rotates through the clamping plate under the action of rotation and rotates into the placement box. The distance between the two clamping plates is less than the thickness of the moisture absorption plate, and the clamping plate squeezes out the moisture in the moisture absorption plate to maintain the continuous moisture absorption capacity of the moisture absorption plate.

[0022] 6. Thermal insulation materials are arranged around the drying cavity, which can reduce heat loss and the impact on the environment. The thermal cycle is realized by using hot air with different humidity in sections. The hottest and wettest hot air at the bottom is naturally discharged, and the relatively dry hot air at the top is used for the incoming air at the bottom, realizing a certain amount of heat recycling and energy conservation and consumption reduction. Brief Description of the Drawings

[0023] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present application and, together with the specification, are further used to explain the principles of the present application and enable those skilled in the relevant art to implement and use the present application.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the present invention.

[0026] Figure 2 It is Figure 1 the front view sectional view schematic diagram of

[0027] Figure 3 It is a schematic structural diagram of the drying unit.

[0028] Figure 4 It is the separation diagram of the drying box, the Y-shaped pipe and the overhead connection unit.

[0029] Figure 5 It is a schematic structural diagram of the inside of the drying box.

[0030] Figure 6 It is the front view sectional view of the drying box.

[0031] Figure 7 It is a schematic structural diagram of the Y-shaped pipe.

[0032] Figure 8 It is a schematic structural diagram of the overhead connection unit.

[0033] Figure 9 Separation diagram of the top plate, the part where the side plates are located, and the bottom plate member.

[0034] Figure 10 Structural schematic diagram of the bottom plate member.

[0035] Figure 11 Structural schematic diagram of the stepper motor, the placement box, the moisture absorption plate, and the second rotating plate.

[0036] Figure 12 Structural schematic diagram of the placement box and the moisture absorption plate.

[0037] Figure 13 Structural schematic diagram of the placement box.

[0038] The reference numerals in the figure are: 11, lower guide roller; 12, upper guide roller; 13, coating; 14, first pipeline; 15, second pipeline; 2, drying unit; 21, drying box; 211, box body; 212, mesh plate; 213, baffle; 214, hot air guiding plate; 215, drying cavity; 216, wedge-shaped cavity; 217, heat insulation layer; 218, inlet; 219, outlet; 22, Y-shaped pipe; 221, main pipe; 222, branch pipe; 23, hot air blower; 24, air box; 25, overhead connection unit; 251, top plate; 252, side plates; 253, bottom plate member; 2531, arc-shaped plate; 2532, liquid tank; 2533, support plate; 2534, vertical plate; 2535, liquid outlet; 2536, inner side plate; 254, stepper motor; 255, first rotating plate; 256, second rotating plate; 257, first connecting plate; 258, placement box; 2581, side plate; 2582, condensation plate; 2583, clamping plate; 2584, friction groove; 2585, window; 2586, second connecting plate; 259, moisture absorption plate; 26, first pore channel; 27, second pore channel; 28, temperature transmitter; 31, through port; 32, top hole; 4, rotating shaft; 5, protective plate.

[0039] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included within the scope of the appended claims. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] To better understand the above technical solutions, the following will describe the above technical solutions in detail in conjunction with the accompanying drawings of the specification and specific embodiments.

[0042] Embodiment 1: As Figure 1 - Figure 7 shown, an embodiment of the present invention provides a coating and drying hot air box, including: a drying unit 2, a plurality of drying units 2 are distributed along the vertical direction, each drying unit 2 is provided with a drying box 21, each drying box 21 is connected to a hot air blower 23 through a Y-shaped pipe 22, each drying box 21 includes a box body 211, two mesh plates 212 are arranged in the middle of the box body 211, a drying cavity 215 is formed between the two mesh plates 212, a temperature transmitter 28 is arranged in the middle of each drying cavity 215, two wedge-shaped cavities 216 are formed in the box body 211 and communicate with the drying cavity 215, the two wedge-shaped cavities 216 are symmetrically distributed on both sides of the drying cavity 215, and the wedge-shaped cavity 216 is used to guide the hot air to move upward and inward.

[0043] An inlet 218 is formed through the bottom of each box body 211, and an outlet 219 is formed through the top of each box body 211. The inlet 218 is connected to the outlet 219 through the drying cavity 215. Two baffles 213 are connected in each box body 211, and the two baffles 213 are symmetrically distributed on both sides of the drying cavity 215. One end of each baffle 213 close to the inlet 218 is connected to the mesh plate 212 through a hot air guide plate 214. A wedge-shaped cavity 216 is formed between the hot air guide plate 214, the mesh plate 212, and the baffle 213. A plurality of ventilation holes are evenly distributed on the mesh plate 212.

[0044] The included angle between the baffle 213 and the mesh plate 212 is 15-20°, the included angle between the hot air guide plate 214 and the mesh plate 212 is 35-40°, the distance between the baffle 213 and the mesh plate 212 gradually narrows along the longitudinal axis direction of the box body 211, and the distance between the top end of the baffle 213 and the top end of the mesh plate 212 is less than the distance between the bottom end of the baffle 213 and the bottom end of the mesh plate 212.

[0045] When the included angle between the baffle 213 and the mesh plate 212 is 15°, the air flow guiding is strong, which can cause a large change in the air flow direction, can quickly guide the air flow to a specific direction; can quickly converge the air flow to the center to form a concentrated air flow bundle.

[0046] When the included angle between the baffle plate 213 and the mesh plate 212 is 20°, the air flow is gently guided, which can make the air flow direction change relatively gently, allowing the air flow to flow along a path relatively close to the original direction; the converging effect on the air flow is not obvious, and the air flow is evenly dispersed in the air cavity.

[0047] When the included angle between the hot air guide plate 214 and the mesh plate 212 is 35°, the acting force of the hot air guide plate 214 on the air is enhanced. When the air passes through, it will be forced to change direction by a large margin, and it can make the air flow in a direction with a larger included angle with the original direction, and a large adjustment of the air flow direction can be realized.

[0048] When the included angle between the hot air guide plate 214 and the mesh plate 212 is 40°, the guiding effect of the hot air guide plate 214 on the air is relatively weak, and the air flow will deviate from the original path at a relatively gentle angle; since the obstruction and interference of the hot air guide plate 214 on the air are relatively small, the kinetic energy loss of the air is also small; the air flow around the hot air guide plate 214 is relatively smooth, the wind pressure distribution is relatively uniform, and the pressure difference formed on the windward side and the leeward side of the hot air guide plate 214 is relatively small, and no obvious local high-pressure or low-pressure areas will be caused.

[0049] The air blows from bottom to top, and a region is formed on the surface of the coating 13. The gas fluidity in this region is poor and there is gas retention, which is not conducive to taking away the moisture on the surface of the coating 13. The wedge-shaped cavity 216 is sharp-angled, and the space above the wedge-shaped cavity 216 becomes smaller and smaller. The structure forms a large wind at the bottom and a small wind at the top, and the wind blows obliquely upwards, giving a vertical component pressure to the hot air towards the inner cavity, forcing the wind to blow vertically towards the drying cavity 215, which is beneficial to destroying the boundary retention effect on the surface of the coating 13. And in cooperation with the hot air guide plate 214, the air does not directly rush towards the mesh plate 212, but moves upwards along the hot air guide plate 214, reducing the wind pressure loss.

[0050] The Y-shaped pipe 22 includes: a main pipe 221, and a plurality of branch pipes 222 are communicated with the main pipe 221. Two air boxes 24 are symmetrically distributed on both sides of the box body 211. Each air box 24 is connected to the main pipe 221 through a hot air blower 23. First holes 26 are respectively formed through both sides of the air box 24, and second holes 27 are respectively formed through each baffle plate 213. The end of the branch pipe 222 away from the air box 24 sequentially passes through the first hole 26, the second hole 27 and is communicated with the wedge-shaped cavity 216. The Y-shaped pipe 22 is used to disperse the hot air in the main pipe 221 into the branch pipes 222 and reduce the wind pressure loss. The temperature transmitter 28 gives a 4-20 mA signal, and the temperature transmitter 28 adjusts the temperature of the hot air blower 23 in real time according to the preset temperature.

[0051] The sub-duct 222 can be placed vertically or horizontally. The placement direction of the sub-duct 222 is adapted to the placement direction of the coating 13. The Y-shaped duct 22 can be divided into 2 sub-ducts 222, or may be divided into three sub-ducts 222 with an additional opening in the middle. One main duct 221 can communicate with 2 or more sub-ducts 222, mainly determined by the width of the drying chamber 215. The wider the drying chamber 215, the more sub-ducts 222 there are.

[0052] For the Y-shaped duct 22, if the main duct 221 is directly connected to the drying chamber 215, the air in the duct moves in one direction, the air is dense, and the air is mainly concentrated in the middle of the duct body, which is not conducive to the dispersion and uniform distribution of the air. Therefore, by adding sub-ducts 222, the air in the main duct 221 is dispersed into the sub-ducts 222, reducing the wind pressure loss and improving the uniformity of the air.

[0053] The process of the temperature transmitter 28 adjusting the temperature of the hot air blower 23: The temperature transmitter 28 is installed near the coating 13 and measures the actual temperature around the coating 13 in real time, and converts the temperature signal into a standard signal for output. The standard signal output by the temperature transmitter 28 is transmitted to the control circuit of the hot air blower 23, and this signal represents the current actual temperature value. The controller in the control circuit of the hot air blower 23 compares the signal received from the temperature transmitter 28 with the preset temperature value. If the actual temperature is lower than the preset temperature, the controller issues an instruction to increase the power of the heating element or increase the fan speed to increase the outlet air temperature of the hot air blower 23; if the actual temperature is higher than the preset temperature, the controller takes the opposite measures, reducing the power of the heating element or reducing the fan speed. The control circuit adjusts the heating power and air volume of the hot air blower 23 by controlling the supply voltage or current of the heating element and the rotation speed of the fan motor according to the results of comparison and judgment, so as to achieve precise adjustment of the temperature of the hot air blower 23 and keep the actual temperature within the preset range.

[0054] A protective plate 5 is connected and arranged at the inlet 218 of the box body 211. The protective plate 5 is in an inverted V shape. The top box body 211 is connected and communicated with the middle and lower box bodies 211 through the first pipeline 14, and the middle and upper box bodies 211 are connected and communicated with the bottom box body 211 through the second pipeline 15.

[0055] Through the first pipeline 14 and the second pipeline 15, the box bodies 211 at different positions are cross-connected and communicated, which is convenient for the dry hot air flowing out of the upper box body 211 to be supplemented into the lower drying chamber 215. The dry hot air above is used for circulation in the area with high humidity below, saving energy and reducing consumption, and at the same time not affecting the humidity dissipation.

[0056] In the drying chamber 215, the hot air usually rises upwards. However, there are air flow disturbances, and sometimes the hot air does not rise upwards, but even flows downwards and exits from the discharge port. The hot air blows towards the lower lower guide roller 11, causing the lower guide roller 11 to be easily dried, and the lower guide roller 11 is likely to adhere to the coating 13. For the bottom box body 211, the protective plate 5 is arranged in an inverted V shape, with a small upper opening and a large lower opening, reducing the downward escape of hot air and reducing the influence of the hot air escaping from the inlet 218 on the lower guide roller 11.

[0057] For other box bodies 211, the protective plate 5 is arranged in an inverted V shape, which can reduce the amount of high humidity gas entering the upper box body 211 from below and reduce the interference of the high humidity gas on the drying of the upper box body 211.

[0058] In use, one end of the coating 13 passes through the inlets 218 and outlets 219 of all the boxes 211 and is wound around the lower guide roller 11 and the upper guide roller 12. The hot air blower 23 is started, and the hot air passes through the main pipe 221. The main pipe 221 branches into a plurality of branch pipes 222 to avoid a single wind direction and the concentration of hot air in the middle of the pipe body, so that the air flowing out of the main pipe 221 moves more evenly in the direction of the plurality of branch pipes 222. The air in the branch pipes 222 enters the wedge-shaped cavity 216 and hits the hot air guide plate 214 and the perforated plate 212. The hot air guide plate 214 is inclined, so that the hot air does not directly rush towards the perforated plate 212, but moves upward along the hot air guide plate 214, reducing the wind pressure loss. The wedge-shaped cavity 216 is in a sharp angle shape, and the air blows obliquely upward. The space above the wedge-shaped cavity 216 becomes smaller and smaller. The structure forms a large wind at the lower part and a small wind at the upper part, giving the hot air a vertical component force towards the inner cavity, forcing the air to blow vertically into the drying cavity 215, which is beneficial to destroying the boundary retention effect on the surface of the coating 13. The perforated plate 212 prevents the hot air from directly blowing into the drying cavity 215, but spreads more evenly into the wedge-shaped cavity 216, making the temperature difference in each part of the drying cavity 215 smaller. A temperature transmitter 28 is arranged in the middle of each drying cavity 215. The actual temperature around the coating 13 is measured in real time by the temperature transmitter 28, and the air outlet temperature of the hot air blower 23 is adjusted in time to ensure that the actual temperature around the coating 13 is maintained within the preset temperature range. Since the hot air of the vertical coating 13 dryer blows from bottom to top. In the drying cavity 215, the hot air usually moves upward, but there is air flow disturbance, and sometimes the hot air moves downward and flows out from the discharge port. The hot air continuously blows on the lower guide roller 11, causing the coating on the lower guide roller 11 to dry, and the lower guide roller 11 is easily bonded to the coating 13, which is not conducive to the drying of the coating 13. By setting the inverted V-shaped protective plate 5, the openings of the two protective plates 5 are small at the top and large at the bottom, so that the hot air in the drying cavity 215 is not easy to rush downward, reducing the influence of the hot air escaping from the inlet 218 on the lower guide roller 11. The hot air in the drying cavity 215 blows vertically on the coating 13, and at the same time dries both sides of the coating 13, forming a large amount of high-humidity gas. There is an overhead design between two adjacent drying units 2, leaving a space, and the high-humidity gas is quickly discharged from the outlet 219 to the external space, avoiding the retention of high-humidity gas in the drying cavity 215. Some high-humidity gas wants to enter the upper drying cavity 215 through the inlet 218 of the upper box 211, but the protective plate 5 is set in an inverted V shape, and the entrance to the upper drying cavity 215 is small, effectively reducing the entry of high-humidity gas. A number of drying units 2 are vertically distributed. The higher up, the lower the water content of the coating 13 and the drier the gas in the box 211. If the low-humidity gas in the upper wind is directly discharged, it is a loss. Through the cross-connection between the upper box 211 and the lower box 211, it is convenient for the dry hot air flowing out of the upper box 211 to be supplemented into the lower drying cavity 215. The dry hot air in the upper part is recycled for the humid area in the lower part, saving energy and reducing consumption, and at the same time not affecting the humidity dissipation.

[0059] Embodiment 2: As Figure 1 - Figure 13 shown, an embodiment of the present invention provides a coating drying hot air box, including: an overhead connection unit 25, adjacent drying units 2 are connected through the overhead connection unit 25, and the overhead connection unit 25 includes: a top plate 251, side plates 252, and a bottom plate member 253 integrally formed into a box body with an open side. The top of each box body 211 is connected with a plurality of rotating plates through a rotating part, each rotating plate is connected with a moisture absorption plate 259, each moisture absorption plate 259 is provided with a placement box 258, and the moisture absorption plate 259 is configured to control the opening area of the side of the box body under the action of rotation and remove the moisture of itself under the action of extrusion.

[0060] The bottom plate member 253 is connected to the top plate 251 through the side plates 252. The bottom plate is connected to the outlet 219 of a box body 211, and the top plate 251 is connected to the inlet 218 of the adjacent box body 211. The top plate 251, side plates 252, and bottom plate member 253 form a semi-circular box body. The bottom plate member 253 includes: an arc plate 2531, the bottom of the arc plate 2531 is connected to the top of the box body 211, the arc plate 2531 is a semi-circular annular plate, a liquid groove 2532 is opened at the top of the arc plate 2531, a liquid outlet 2535 is penetrated and opened at one end of the arc plate 2531 and the liquid outlet 2535 is connected to the liquid groove 2532, a plurality of support plates 2533 are connected to the top of the liquid groove 2532, a vertical plate 2534 is connected to the top of the inner edge of the middle section of the arc plate 2531, the number of arc plates 2531 on both sides of the longitudinal axis of the vertical plate 2534 is the same, the distance between adjacent support plates 2533 on the same side of the vertical plate 2534 is d, one side of the vertical plate 2534 and one side of a support plate 2533 are in the same plane, the distance between the other side of the vertical plate 2534 and one side of another support plate 2533 is also d, two inner side plates 2536 are connected to the inner wall of the arc plate 2531, a heat preservation cavity 217 is provided between the inner wall of the box body 211 and the baffle 213, a through hole 31 is penetrated and opened on the side of the side plate 252 close to the coating 13, and a top hole 32 is penetrated and opened on the top of the top plate 251.

[0061] A stepper motor 254 is connected to the top of the box body 211. The rotating part of the stepper motor 254 is connected to several rotating plates through a rotating shaft 4. The rotating plates include: a first rotating plate 255 and a second rotating plate 256. The first rotating plate 255 is a straight plate, and the second rotating plate 256 is a curved plate. Each first rotating plate 255 or second rotating plate 256 is connected to a moisture absorption plate 259 through a first connecting plate 257. A placement box 258 is connected to the top of each support plate 2533. The moisture absorption plate 259 enters and exits the placement box 258 under the action of rotation. The height of the vertical plate 2534 is the same as the height of the moisture absorption plate 259. The rotating plate is composed of several first rotating plates 255 and one second rotating plate 256. The rotating plates located on both sides of the longitudinal axis of the vertical plate 2534 are symmetrically distributed. The distance between the first connecting plate 257 and the adjacent placement box 258 is greater than the length of the moisture absorption plate 259.

[0062] The top plate 251, the side plate 252, and the bottom plate member 253 form three sides of a semi-circular box body, forming a relatively enclosed semi-circular box body to accommodate high-humidity gas. A moisture absorber can also be added to quickly extract the moisture in the semi-circular box body. The semi-circular box body has a total of four sides. The semi-circular box body lacks a complete arc surface. The moisture absorption plate 259 and the placement box 258 are both arranged at the arc surface of the semi-circular box body. The unfolded area of the semi-circular arc surface is controlled by the unfolded area of the moisture absorption plate 259. When the moisture absorption plate 259 is entirely located in the placement box 258, the opening area of the semi-circular arc surface is the largest, and the dehumidification effect is the best. When the moisture absorption plate 259 is entirely pulled out of the placement box 258, the opening area of the semi-circular arc surface is the smallest (the semi-circular box body is basically sealed, only leaving some gaps), and the dehumidification effect is the worst.

[0063] The placement box 258 includes: two side plates 2581. The bottom of the side plates 2581 is connected to the top of the support plate 2533. The inner wall of one side plate 2581 is connected to a condensation plate 2582. A window 2585 is penetrated and opened on one side of the other side plate 2581. A second connecting plate 2586 is arranged between the two side plates 2581. The two ends of the second connecting plate 2586 are integrally formed with the closer ends of the two side plates 2581 respectively. A clamping plate 2583 is connected to each end of the side plate 2581 away from the second connecting plate 2586. Friction grooves 2584 are opened on the closer sides of the two clamping plates 2583. The distance between the two clamping plates 2583 gradually decreases and then gradually increases along the direction of the virtual axis. The distance in the middle of the two clamping plates 2583 is less than the distance at any other place on the two clamping plates 2583. The distance in the middle of the two clamping plates 2583 is less than the thickness of the moisture absorption plate 259. A placement cavity is arranged between the two side plates 2581. The placement cavity is adapted to the moisture absorption plate 259. One end of the coating 13 enters from the inlet 218 of the bottom box body 211 and exits from the outlet 219 of the top box body 211. Lower guide rollers 11 and upper guide rollers 12 are respectively arranged outside the bottom box body 211 and the top box body 211. The coating 13 is wound around the lower guide rollers 11 and the upper guide rollers 12.

[0064] When the moisture absorption plate 259 is drawn out from the placement box 258, the moisture absorption plate 259 no longer blocks the condensation plate 2582, and the moisture-containing gas contacts the condensation plate 2582 and condenses into small water droplets, improving the dehumidification ability.

[0065] The second rotating plate 256 is an arcuate plate, and the second rotating plate 256 bends away from the coating 13, avoiding that the first rotating plate 255 and the second rotating plate 256 need to pass through the drying chamber 215 and the outlet 219 of the box body 211 for the coating 13. The overhead connection unit 25 is arranged between two adjacent box bodies 211, so the coating 13 also needs to pass through the overhead connection unit 25, and the rotating plates in the overhead connection unit 25 are rotatably connected. In order to avoid the rotating plate contacting the coating 13, the second rotating plate 256 adjacent to the coating 13 and rotating in the direction close to the coating 13 needs to be bent to increase the distance between the second rotating plate 256 and the coating 13, ensuring that the second rotating plate 256 does not contact the coating 13 during the rotation process.

[0066] During use, based on the dehumidification data of past records, the amount of high-humidity gas flowing out per unit time and the gas humidity at the top of each box body 211 are determined. The stepping motor 254 rotates, and the rotating shaft 4 of the stepping motor 254 drives the first rotating plate 255, the second rotating plate 256, the first connecting plate 257, and the moisture absorption plate 259 to rotate in sequence. The moisture absorption plate 259 is drawn out from the placement box 258 to adjust the unfolded area of the arc surface of the semi-circular box body. The moisture-containing gas in the lower box body has a high humidity and a large amount of humidity gas is generated. The moisture absorption plate 259 is drawn out less from the placement box 258 to increase the moisture dissipation capacity per unit time. The moisture-containing gas in the upper box body has a low humidity and a small amount of humidity gas is generated. In order to reduce heat consumption, the moisture absorption plate 259 is drawn out from the placement box 258, and the moisture absorption plate 259 is basically sealed, so that the hot air in the semi-circular box body is transferred to the drying chamber 215 with high gas humidity below through the pipeline. The dry hot air above is used for the cycle of the humid area below, saving energy and reducing consumption, and at the same time not affecting moisture dissipation. As the moisture absorption plate 259 is drawn out from the placement box 258, the moisture absorption plate 259 no longer blocks the condensation plate 2582, and the moisture-containing gas contacts the condensation plate 2582 and condenses into small water droplets, improving the dehumidification effect. The moisture at the outlet 219 can be measured in real time through a humidity measuring instrument, and the opening area of the semi-circular box body can be adjusted in time, flexibly adjusted to adapt to various vertical stratified drying boxes 21. The moisture absorption plate 259 is mostly made of moisture-absorbing elastic materials such as sponge. The moisture absorption plate 259 has a strong moisture absorption ability. When the moisture absorption plate 259 absorbs too much water (the moisture situation of the moisture absorption plate 259 can be judged according to the use time or the measuring instrument), the rotating part of the stepping motor 254 rotates in the reverse direction, and the moisture absorption plate 259 rotates under the rotation action through the clamping plate 2583 and rotates into the placement box 258. The distance between the two clamping plates 2583 is less than the thickness of the moisture absorption plate 259, and the clamping plate 2583 squeezes out the water in the moisture absorption plate 259 to maintain the continuous moisture absorption ability of the moisture absorption plate 259.

[0067] The present invention encompasses any alternatives, modifications, equivalent methods, and solutions made to the essence and scope of the present invention. To enable the public to thoroughly understand the present invention, specific details are described in detail in the above preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. In addition, well-known methods, processes, procedures, components, and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0068] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A coating and drying hot air box, characterized in that: include: A drying unit (2), wherein a plurality of drying units (2) are distributed in a vertical direction, each drying unit (2) is provided with a drying box (21), each drying box (21) is connected to a hot air blower (23) via a Y-shaped tube (22), each drying box (21) comprises a box body (211), two mesh plates (212) are provided in the middle of the box body (211), a drying chamber (215) is provided between the two mesh plates (212), a temperature transmitter (28) is provided in the middle of each drying chamber (215), two wedge-shaped chambers (216) are provided in the box body (211) and are connected to the drying chamber (215), the two wedge-shaped chambers (216) are symmetrically distributed on both sides of the drying chamber (215), and the wedge-shaped chambers (216) are used to guide the hot air to move upward and inward; An overhead connection unit (25), wherein adjacent drying units (2) are connected via the overhead connection unit (25), wherein the overhead connection unit (25) comprises: a top plate (251), a side plate (252), and a bottom plate (253) integrally formed into a box body with open sides, wherein the top of each box body (211) is connected to a plurality of moisture absorbing plates (259) via a rotating portion, and each moisture absorbing plate (259) is provided with a placement box (258), wherein the moisture absorbing plates (259) are arranged to control the opening area of ​​the side of the box body under the action of rotation and remove moisture from the plate under the action of squeezing; The bottom plate (253) is connected to the top plate (251) via the side plate (252); a stepper motor (254) is connected to the top of the box body (211); a rotating part of the stepper motor (254) is connected to a plurality of rotating plates via a rotating shaft (4); the rotating plates include: a first rotating plate (255) and a second rotating plate (256); the first rotating plate (255) is a straight plate; the second rotating plate (256) is a curved plate; each of the first rotating plates (255) or the second rotating plates (256) is connected to a moisture absorbing plate (256) via a first connecting plate (257); 59), the top of each support plate (2533) is connected to a placement box (258), the desiccant plate (259) moves in and out of the placement box (258) under the action of rotation, the height of the vertical plate (2534) is the same as the height of the desiccant plate (259), the rotating plate is composed of a plurality of the first rotating plates (255) and a second rotating plate (256), the rotating plates located on both sides of the longitudinal axis of the vertical plate (2534) are symmetrically distributed, and the distance between the first connecting plate (257) and the adjacent placement box (258) is greater than the length of the desiccant plate (259).

2. The coating and drying hot air box according to claim 1, characterized in that: An inlet (218) is formed through the bottom of each box (211), and an outlet (219) is formed through the top of each box (211); the inlet (218) is connected to the outlet (219) through the drying chamber (215); two baffles (213) are connected to each box (211); the two baffles (213) are symmetrically distributed on both sides of the drying chamber (215); one end of each baffle (213) close to the inlet (218) is connected to the mesh plate (212) through a hot air guide plate (214); a wedge-shaped cavity (216) is formed between the hot air guide plate (214), the mesh plate (212) and the baffle (213); and a plurality of ventilation holes are evenly distributed on the mesh plate (212).

3. The coating and drying hot air box according to claim 2, characterized in that: The included angle between the baffle plate (213) and the mesh plate (212) is 15-20 degrees, the included angle between the hot air guide plate (214) and the mesh plate (212) is 35-40 degrees, the spacing between the baffle plate (213) and the mesh plate (212) gradually narrows along the longitudinal axis direction of the box body (211), and the distance between the top end of the baffle plate (213) and the top end of the mesh plate (212) is smaller than the distance between the bottom end of the baffle plate (213) and the bottom end of the mesh plate (212).

4. The coating and drying hot air box according to claim 2, characterized in that: The Y-shaped pipe (22) comprises: a main pipe (221), the main pipe (221) being connected to a plurality of branch pipes (222), two wind boxes (24) being symmetrically distributed on both sides of the box body (211), each wind box (24) being connected to the main pipe (221) via a hot air blower (23), a first hole (26) being penetrated on both sides of the wind box (24), a second hole (27) being penetrated on each baffle (213), and the branch pipes (2 The end of the Y-shaped tube (22) away from the wind box (24) passes through the first hole (26) and the second hole (27) in sequence and is connected to the wedge-shaped cavity (216). The Y-shaped tube (22) is used to disperse the hot air from the main pipe (221) into the branch pipe (222) and reduce the wind pressure loss, so as to evenly distribute the hot air into the box body (211). The temperature transmitter (28) gives a 4-20mA signal. The temperature transmitter (28) adjusts the temperature of the hot air blower (23) in real time according to the preset temperature.

5. The coating and drying hot air box according to claim 1, characterized in that: The bottom plate is connected to the outlet (219) of one box body (211), and the top plate (251) is connected to the inlet (218) of the adjacent box body (211). The top plate (251), the side plates (252), and the bottom plate member (253) form a semicircular box body. The bottom plate member (253) comprises an arc plate (2531). The bottom of the arc plate (2531) is connected to the top of the box body (211). The arc plate (2531) is a semicircular annular plate. A liquid groove (2532) is provided on the top of the arc plate (2531). A liquid outlet (2535) is provided at one end of the arc plate (2531) and the liquid outlet (2535) is connected to the liquid groove (2532). A plurality of support plates (2533) are connected to the top of the liquid groove (2532). A vertical plate (2534) is connected to the top of the inner edge of the middle section of the box (2531), the number of arc-shaped plates (2531) on both sides of the longitudinal axis of the vertical plate (2534) is the same, the spacing between adjacent support plates (2533) located on the same side of the vertical plate (2534) is d, one side of the vertical plate (2534) and one side of a support plate (2533) are located in the same plane, and the distance between the other side of the vertical plate (2534) and one side of another support plate (2533) is also d, the inner wall of the arc-shaped plate (2531) is connected to two inner side plates (2536), a heat preservation chamber (217) is provided between the inner wall of the box body (211) and the baffle plate (213), a through opening (31) is penetrated through the side of the side plate (252) close to the coating (13), and a top hole (32) is penetrated through the top of the top plate (251).

6. The coating and drying hot air box according to claim 5, characterized in that: The placement box (258) comprises: two side plates (2581), the bottom of the side plates (2581) is connected to the top of the support plate (2533), the inner wall of one of the side plates (2581) is connected to a condensation plate (2582), a window (2585) is provided through one side of the other side plate (2581), a second connecting plate (2586) is provided between the two side plates (2581), the two ends of the second connecting plate (2586) are respectively integrally formed with the ends of the two side plates (2581) that are close to each other, the end of each side plate (2581) that is away from the second connecting plate (2586) is connected to a clamping plate (2583), the two clamping plates (2583) are provided with friction grooves (2584) on the sides close to each other, and the two clamping plates (2583) are provided with a plurality of flanges. 83) gradually decreases along the direction of the virtual axis and then gradually increases, the distance between the middle parts of the two clamping plates (2583) is less than the distance between any other points on the two clamping plates (2583), the distance between the middle parts of the two clamping plates (2583) is less than the thickness of the moisture absorbing plate (259), a placement cavity is provided between the two side plates (2581), the moisture absorbing plate (259) is adapted to the placement cavity, one end of the coating (13) enters from the inlet (218) of the bottom box body (211) and moves out from the outlet (219) of the top box body (211), the bottom box body (211) and the top box body (211) are respectively provided with a lower guide roller (11) and an upper guide roller (12), and the coating (13) is wound around the lower guide roller (11) and the upper guide roller (12).

7. The coating and drying hot air box according to claim 6, characterized in that: The second rotating plate (256) is a bow-shaped plate, and the second rotating plate (256) is bent in a direction away from the coating (13), so as to prevent the first rotating plate (255) and the second rotating plate (256) from contacting the coating (13) during rotation.

8. The coating and drying hot air box according to claim 1, characterized in that: A protective plate (5) is connected to the inlet (218) of the box body (211), and the protective plate (5) is in an inverted V shape. The top box body (211) is connected to the middle and lower box body (211) through a first pipe (14), and the middle and upper box body (211) is connected to the bottom box body (211) through a second pipe (15).

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