Coating and drying hot air box

Abstract

The invention discloses a coating and drying hot air box, and relates to the technical field of coating and drying machines. The coating and drying hot air box comprises a plurality of drying units which are vertically arranged, adjacent units are arranged in an overhead mode, each drying unit is provided with a hot air guide plate, a left wedge-shaped cavity, a right wedge-shaped cavity, a drying cavity, a heat preservation layer, an overhead connecting unit and the like, a temperature transmitter is arranged in the middle of each drying cavity, and the wedge-shaped cavities are distributed on the two sides of the drying cavity and communicated with the drying cavity through mesh plates. The wedge-shaped cavity is used for guiding hot air to move upwards and inwards; according to the coating and drying hot air box, the integrated drying box is divided into the multiple drying units, the temperature of the drying units is independently controlled, the adjacent drying units are connected through the overhead connecting units, the release amount of high-humidity gas is controlled, and moisture of different humidity grades is released separately; the wedge-shaped cavity has air pressure perpendicular to the coating direction while ensuring that hot air moves upwards, the boundary retention effect of the coating surface is damaged, and the drying efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coating and drying machines, and in particular to a coating and drying hot air box. Background Art

[0002] Vertical coating drying oven is a kind of equipment used to dry the coated materials in the vertical direction.

[0003] China Patent Application Publication No.: CN204996665U, a vertical coating machine for double-sided coating of thin films, including a vertical frame, an unwinding mechanism and a winding mechanism, a gluing mechanism is arranged below the vertical frame, an oven body is arranged in the vertical frame, at least one set of heating devices is arranged on the side of the oven body, a hot air heating system is provided with an air inlet duct and two sets of air inlet nozzles, the two sets of air inlet nozzles are respectively arranged on the two side surfaces of the oven body, the two sets of air inlet nozzles and the exhaust nozzles are respectively connected to the baking 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 performed 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 body. The high-humidity gas generated in the lower cavity cannot be discharged in time, and the drying effect is poor. For example, in the above-mentioned patent application publication number CN204996665U, during the drying process of the coating, the moisture on the surface is taken away, and a large amount of high-humidity gas enters the continuous drying cavity of 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, thereby reducing the quality of the coating drying; and each cavity The amount of humid gas generated per unit time and the moisture content of the humid gas are different, and the dehumidification capacity of each cavity needs to be flexibly adjusted; the air inlet is mostly set on the bottom side of the drying furnace body, and the wind blows from bottom to top along the drying cavity. The coating surface is prone to boundary retention effect, the wind fluidity is poor, and the drying efficiency is reduced. For example, in the above-mentioned patent application publication number CN204996665U, the hot air fluidity on the coating surface in the drying cavity is weak, and the hot air cannot quickly take away the high-humidity gas on the coating surface, reducing the drying efficiency. In addition, the high-humidity gas cannot be discharged in time, and the drying effect of the coating is even worse. Summary of the invention

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

[0006] Technical solution: To achieve the above objectives, the present invention is implemented through the following technical solutions: a coating drying hot air box, comprising: a drying unit, a plurality of drying units are distributed along the vertical direction, 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 comprises a box body, two mesh plates are provided in the middle of the box body, a drying cavity is provided between the two mesh plates, a temperature transmitter is provided in the middle of each drying cavity, two wedge-shaped cavities are provided in the box body and are connected to the drying cavity, the two wedge-shaped cavities are symmetrically distributed on both sides of the drying cavity, and the wedge-shaped cavity is used to guide the hot air to move upward and inward.

[0007] An overhead connection unit, wherein adjacent drying units are connected via the overhead connection unit, and the overhead connection unit comprises: a top plate, a side plate, and a bottom plate integrally formed into a box body with an open side, and the top of each box body is connected to a plurality of desiccant plates via a rotating part, and each desiccant plate is equipped with a placement box, and the desiccant plates are configured to control the opening area of ​​the side of the box body under the action of rotation and remove their own moisture under the action of squeezing.

[0008] Preferably, an inlet is opened through the bottom of each of the boxes, and an outlet is opened through the top of each of the boxes, and the inlet is connected to the outlet through a drying chamber. Two baffles are connected to each of the boxes, and the two baffles are symmetrically distributed on both sides of the drying chamber. One end of each baffle close to the inlet is connected to the mesh plate through a hot air guide plate, and a wedge-shaped cavity is formed between the hot air guide plate, the mesh plate and the baffle, and a number of ventilation holes are evenly distributed on the mesh plate.

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

[0010] Preferably, the Y-shaped tube comprises: a main tube, the main tube is connected to a plurality of branch tubes, two bellows are symmetrically distributed on both sides of the box body, each bellows is connected to the main tube through a hot air blower, a first hole is penetrated on both sides of the bellows, a second hole is penetrated on each baffle, the end of the branch tube away from the bellows passes through the first hole and the second hole in sequence and is connected to the wedge-shaped cavity, the Y-shaped tube is used to disperse the hot air from the main tube into the branch tube and reduce the wind pressure loss, the temperature transmitter gives a 4-20mA 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 is connected to the top plate through the side plate, the bottom plate is connected to the outlet of one box, the top plate is connected to the inlet of an adjacent box, the top plate, the side plate and the bottom plate form a semicircular box body, and the bottom plate comprises: an arc plate, the bottom of the arc plate is connected to the top of the box, the arc plate is a semicircular annular plate, a liquid tank is provided on the top of the arc plate, a liquid outlet is provided at one end of the arc plate and the liquid outlet is connected to the liquid tank, and a plurality of support blocks are connected to the top of the liquid tank. A support plate, the top of the inner edge of the middle section of the arc-shaped plate is connected with a vertical plate, the number of arc-shaped plates on both sides of the longitudinal axis of the vertical plate is the same, the spacing 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 located in the same plane, the other side of the vertical plate is also at a distance of d from one side of another support plate, the inner wall of the arc-shaped plate is connected with two inner side plates, an insulation cavity is provided between the inner wall of the box and the baffle, a through opening is opened through the side of the side plate close to the coating, and a top hole is opened through the top of the top plate.

[0012] Preferably, a stepper motor is connected to the top of the box body, and the rotating part of the stepper 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, the second rotating plate is a curved plate, each of the first rotating plate or the second rotating plate is connected to a desiccant plate through a first connecting plate, and a placement box is connected to the top of each of the supporting plates, the desiccant plate moves in and out of the placement box under the action of rotation, the height of the vertical plate is the same as that of the desiccant plate, the rotating plate is composed of a plurality of the first rotating plates and a second rotating plate, the rotating plates located on both sides of the longitudinal axis of the vertical plate are symmetrically distributed, and the distance between the first connecting plate and the adjacent placement box is greater than the length of the desiccant plate.

[0013] Preferably, the placement box comprises: two side panels, the bottom of the side panels is connected to the top of the support plate, the inner wall of one of the side panels is connected to the condensation plate, and a window is opened on one side of the other side panel, a second connecting plate is arranged between the two side panels, two ends of the second connecting plate are respectively integrally formed with one end close to the two side panels, one end of each side panel away from the second connecting plate is connected to a clamping plate, and a friction groove is opened on one side close to the two clamping plates, the distance between the two clamping plates gradually decreases along the direction of the virtual axis and then gradually increases, the distance between the middle parts of the two clamping plates is less than the distance between any other points on the two clamping plates, and the distance between the middle parts of the two clamping plates is less than the thickness of the hygroscopic plate, a placement cavity is arranged between the two side panels, the placement cavity is adapted to the hygroscopic plate, one end of the coating enters from the inlet of the bottom box body and moves out from the outlet of the top box body, and a lower guide roller and an upper guide roller are respectively arranged on the outside of the bottom box body and the top box body, and the coating is wrapped around the lower guide roller and the upper guide roller.

[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: 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 5. The overhead connection unit is arranged between two adjacent box members to form a semicircular box body. The amount of the desiccant plate extracted from the placement box is controlled by rotation, thereby controlling the open area of ​​the arc surface of the box body to adjust the moisture dissipation capacity. When there is a lot of moisture on the desiccant plate, the desiccant plate passes 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 desiccant plate. The clamping plate squeezes out the moisture in the desiccant plate to maintain the continuous moisture absorption capacity of the desiccant plate.

[0021] 6. Insulation materials are arranged around the drying chamber to reduce heat loss and impact on the environment. Heat circulation is achieved by using segmented hot air outlets with different humidity levels. The wettest hot air at the bottom is naturally discharged, and the drier hot air above is used for the incoming air below, thus achieving a certain degree of heat recycling and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, further serve to explain the principles of the present application and enable those skilled in the relevant art to make and use the present application.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 for Figure 1 Schematic diagram of front cross-section.

[0026] Figure 3 It is a structural schematic diagram of the drying unit.

[0027] Figure 4 This is a diagram of the separation of the drying box, the Y-shaped tube, and the overhead connection unit.

[0028] Figure 5 Schematic diagram of the internal structure of the drying box.

[0029] Figure 6 This is a front cross-sectional view of the drying box.

[0030] Figure 7 It is a schematic diagram of the structure of the Y-shaped tube.

[0031] Figure 8 It is a structural schematic diagram of the overhead connection unit.

[0032] Fig. 9 This is a separate diagram of the top plate, the side plate part, and the bottom plate.

[0033] Fig.10 It is a structural schematic diagram of the bottom plate.

[0034] Fig.11 It is a schematic diagram of the structure of a stepper motor, a placement box, a moisture absorption plate, and a second rotating plate.

[0035] Fig.12 It is a schematic diagram of the structure of the placement box and the moisture absorbing plate.

[0036] Fig.13 A schematic diagram of the structure of the placement box.

[0037] 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 guide plate; 215, drying chamber; 216, wedge-shaped chamber; 217, insulation layer; 218, inlet; 219, outlet; 22, Y-shaped pipe; 221, main pipe; 222, branch pipe; 23, hot air blower; 24, wind box; 25, overhead connection unit; 251, top plate; 252, side plate; 253, bottom plate; 2531, Curved plate; 2532, liquid tank; 2533, support plate; 2534, vertical plate; 2535, liquid outlet; 2536, inner plate; 254, stepping 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 channel; 27, second channel; 28, temperature transmitter; 31, through port; 32, top hole; 4, rotating shaft; 5, protective plate.

[0038] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Example 1: Figure 1 - Figure 7 As shown, an embodiment of the present invention provides a coating drying hot air box, including: a drying unit 2, a plurality of drying units 2 are distributed in 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 tube 22, each drying box 21 includes a box body 211, two mesh plates 212 are provided in the middle of the box body 211, a drying cavity 215 is opened between the two mesh plates 212, a temperature transmitter 28 is provided in the middle of each drying cavity 215, two wedge-shaped cavities 216 are opened in the box body 211 and are connected to 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.

[0042] 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 among the hot air guide plate 214, the mesh plate 212 and the baffle 213, and a number of ventilation holes are evenly distributed on the mesh plate 212.

[0043] The angle between the baffle 213 and the mesh plate 212 is 15-20°, the 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 of the baffle 213 and the top of the mesh plate 212 is smaller than the distance between the bottom of the baffle 213 and the bottom of the mesh plate 212.

[0044] When the included angle between the baffle 213 and the mesh plate 212 is 15°, the airflow is strongly guided, which can significantly change the direction of the airflow and quickly guide the airflow to a specific direction; the airflow can quickly converge to the center to form a concentrated airflow beam.

[0045] When the angle between the baffle 213 and the mesh plate 212 is 20°, the airflow is guided gently, and the airflow direction can change more gradually, allowing the airflow to flow in a path relatively close to the original direction; the convergence effect on the airflow is not obvious, and the airflow is dispersed more evenly in the wind cavity.

[0046] When the angle between the hot air guide plate 214 and the mesh plate 212 is 35°, the hot air guide plate 214 exerts a stronger force on the wind, and the wind is forced to change direction significantly when passing through, so that the wind can flow in a direction with a larger angle to the original direction, thereby achieving a significant adjustment of the wind flow direction.

[0047] When the 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 wind is relatively weak, and the wind flow will deviate from the original path at a relatively gentle angle; since the hot air guide plate 214 has relatively little obstruction and interference to the wind, the kinetic energy loss of the wind is also relatively small; the wind flows relatively smoothly around the hot air guide plate 214, and 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, which will not cause obvious local high pressure or low pressure areas.

[0048] The wind blows upward from the bottom, and forms an area on the surface of the coating 13. The gas flowability in this area 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 is getting smaller and smaller. The structure forms a large downwind and small upwind. The wind blows upward obliquely, giving the hot air a vertical partial pressure to the inner cavity, forcing the wind to blow vertically to the drying chamber 215, which is conducive to destroying the boundary retention effect on the surface of the coating 13. In addition, with the hot air guide plate 214, the wind does not rush directly to the mesh plate 212, but moves upward along the hot air guide plate 214 to reduce wind pressure loss.

[0049] The Y-shaped tube 22 includes: a main tube 221, which is connected to a plurality of branch tubes 222. Two wind boxes 24 are symmetrically distributed on both sides of the box body 211. Each wind box 24 is connected to the main tube 221 through the hot air blower 23. A first hole 26 is penetrated on both sides of the wind box 24, and a second hole 27 is penetrated on each baffle 213. One end of the branch tube 222 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 tube 221 to the branch tube 222 and reduce the wind pressure loss. The temperature transmitter 28 gives a 4-20mA signal, and the temperature transmitter 28 adjusts the temperature of the hot air blower 23 in real time according to the preset temperature.

[0050] The branch pipe 222 can be placed vertically or horizontally. The direction in which the branch pipe 222 is placed is compatible with the direction in which the coating 13 is placed. The Y-shaped tube 22 can be divided into two branch pipes 222, or it can be divided into three branch pipes 222 by adding a mouth in the middle. A main pipe 221 can connect to two or more branch pipes 222, which is mainly determined by the width of the drying chamber 215. The wider the drying chamber 215, the more branch pipes 222 there are.

[0051] For the Y-shaped tube 22, if the main tube 221 is directly connected to the drying chamber 215, the wind in the tube moves in one direction, the wind is dense, and the wind is mainly concentrated in the middle of the tube body, which is not conducive to the dispersion and uniform distribution of the wind. Therefore, by adding the branch tube 222, the wind in the main tube 221 is dispersed to the branch tube 222, reducing the wind pressure loss and improving the uniformity of the wind.

[0052] The process of adjusting the temperature of the hot air blower 23 by the temperature transmitter 28: 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 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 received temperature transmitter 28 signal 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 air outlet temperature of the hot air blower 23; if the actual temperature is higher than the preset temperature, the controller takes the opposite measure to reduce the power of the heating element or reduce the fan speed. According to the results of comparison and judgment, the control circuit adjusts the heating power and air outlet of the hot air blower 23 by controlling the power supply voltage or current of the heating element and the speed of the fan motor, thereby realizing accurate adjustment of the temperature of the hot air blower 23 and keeping the actual temperature within the preset range.

[0053] A protective plate 5 is connected to 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 to the middle and lower box body 211 through the first pipe 14 , and the middle and upper box body 211 is connected to the bottom box body 211 through the second pipe 15 .

[0054] The boxes 211 at different positions are cross-connected through the first pipe 14 and the second pipe 15, so that the dry hot air flowing out of the upper box 211 can be supplemented into the drying chamber 215 below. The dry hot air above is circulated for the humid area below, which saves energy and reduces consumption without affecting the humidity dissipation.

[0055] In the drying chamber 215, the hot air usually goes upward, but there is disturbance in the airflow, and the hot air sometimes does not go upward, and even goes downward and flows out from the discharge port. The hot air blows to the lower guide roller 11 at the lower part, which makes the lower guide roller 11 easy to dry, and the lower guide roller 11 is easy to stick to the coating 13. For the bottom box 211, the protective plate 5 is set in an inverted V shape, with a small opening at the upper part and a large opening at the lower part, so as to reduce the hot air from jumping downward and reduce the influence of the hot air escaping from the inlet 218 on the lower guide roller 11.

[0056] For other boxes 211 , the protection plate 5 is set in an inverted V shape, which can reduce the amount of high-humidity gas from the bottom entering the upper box 211 and reduce the interference of high-humidity gas on the drying of the upper box 211 .

[0057] When in use, one end of the coating 13 passes through the inlet 218 and the outlet 219 of all the boxes 211 and is wound around the lower guide roller 11 and the upper guide roller 12. Start the hot air blower 23, and the hot air passes through the main pipe 221. The main pipe 221 is bifurcated into multiple branch pipes 222 to avoid a single wind direction. The hot air is concentrated in the middle of the pipe body, so that the wind flowing out of the main pipe 221 moves more evenly in the direction of the multiple branch pipes 222. The wind from the branch pipes 222 enters the wedge-shaped cavity 216 and hits the hot air guide plate 214 and the mesh plate 212. The hot air guide plate 214 is tilted so that the hot air does not need to rush directly to the mesh plate 212, but moves upward along the hot air guide plate 214 to reduce wind pressure loss. The wedge-shaped cavity 216 is pointed, and the wind blows upward at an angle. The space above the wedge-shaped cavity 216 becomes smaller and smaller, and the structure forms a large downwind and a small upwind, which gives the hot air a vertical partial pressure to the inner cavity, forcing the wind 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 mesh plate 212 prevents the hot air from blowing directly into the drying chamber 215, but rather distributes it more evenly into the wedge-shaped chamber 216, so that the heat difference between the various regions in the drying chamber 215 is reduced. A temperature transmitter 28 is provided in the middle of each drying chamber 215, which measures the actual temperature around the coating 13 in real time and adjusts the air outlet temperature of the hot air blower 23 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 chamber 215, the hot air usually goes upward, but there is disturbance in the air flow, and the hot air sometimes goes downward and flows out from the discharge port. The hot air is constantly blown to the lower guide roller 11, causing the coating on the lower guide roller 11 to dry. The lower guide roller 11 is easy to stick to the coating 13, which is not conducive to the drying of the coating 13. By setting an inverted V-shaped protective plate 5, the openings of the two protective plates 5 are small at the top and large at the bottom, and the hot air in the drying chamber 215 is not easy to jump down, reducing the impact of the hot air escaping from the inlet 218 on the lower guide roller 11. The hot air in the drying chamber 215 blows the coating 13 vertically, and dries both sides of the coating 13 at the same time, forming a large amount of high-humidity gas. The overhead design between the two adjacent drying units 2 leaves space, and the high-humidity gas is promptly dispersed from the outlet 219 to the external space to avoid the high-humidity gas remaining in the drying chamber 215. Some high-humidity gas wants to enter the upper drying chamber 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 chamber 215 is small, which effectively reduces the entry of high-humidity gas. Several drying units 2 are distributed vertically. The higher they are, the lower the water content of the coating 13, and the drier the gas in the box 211. If the low-humidity gas upwind is directly discharged directly, 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 to the drying chamber 215 below. The dry hot air above is circulated for the humid area below, which saves energy and reduces consumption, and does not affect the humidity dissipation.

[0058] Example 2: Figure 1 - Fig.13 As 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, the overhead connection unit 25 includes: a top plate 251, a side plate 252, and a bottom plate 253 are integrally formed into a box body with an open side, and the top of each box body 211 is connected to a plurality of rotating plates through a rotating part, each rotating plate is connected to a desiccant plate 259, and each desiccant plate 259 is equipped with a placement box 258, and the desiccant plate 259 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 squeezing.

[0059] The bottom plate 253 is connected to the top plate 251 through the side plate 252. The bottom plate is connected to the outlet 219 of one box 211, and the top plate 251 is connected to the inlet 218 of the adjacent box 211. The top plate 251, the side plate 252, and the bottom plate 253 form a semicircular box body. The bottom plate 253 includes: an arc plate 2531, the bottom of the arc plate 2531 is connected to the top of the box 211, the arc plate 2531 is a semicircular annular plate, and a liquid tank 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 tank 2532. The top of the liquid tank 2532 is connected to a plurality of support plates 2 533, the top of the inner edge of the middle section of the arc plate 2531 is connected with a vertical plate 2534, the number of arc plates 2531 on both sides of the longitudinal axis of the vertical plate 2534 is the same, the spacing 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 located in the same plane, the other side of the vertical plate 2534 and the other side of the support plate 2533 are also at a distance d, the inner wall of the arc plate 2531 is connected with two inner side plates 2536, an insulation chamber 217 is provided between the inner wall of the box body 211 and the baffle 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.

[0060] A stepper motor 254 is connected to the top of the box body 211, and the rotating part of the stepper motor 254 is connected to a plurality of 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 the second rotating plate 256 is connected to a desiccant plate 259 through a first connecting plate 257. A placement box 258 is connected to the top of each support plate 2533. 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 that of the desiccant plate 259. The rotating plates are composed of a plurality of first rotating plates 255 and a second rotating plate 256. The rotating plates 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.

[0061] The top plate 251, the side plate 252, and the bottom plate 253 form three sides of the semicircular box body, forming a relatively closed semicircular box body and accommodating high-humidity gas. A dehumidifier can also be added to quickly extract the moisture in the semicircular box body. The semicircular box body has four sides in total. The semicircular box body lacks a complete arc surface. The hygroscopic plate 259 and the placement box 258 are both arranged on the arc surface of the semicircular box body. The expansion area of ​​the semicircular arc surface is controlled by the expansion area of ​​the hygroscopic plate 259. When the hygroscopic plate 259 is completely located in the placement box 258, the opening area of ​​the semicircular arc surface is the largest, and the dehumidification effect is the best; when the hygroscopic plate 259 is completely pulled out of the placement box 258, the opening area of ​​the semicircular arc surface is the smallest (the semicircular box body is basically sealed, leaving only some gaps), and the dehumidification effect is the worst.

[0062] The placing 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 the condensation plate 2582, and a window 2585 is opened on one side of the other side plate 2581, a second connecting plate 2586 is arranged between the two side plates 2581, and the two ends of the second connecting plate 2586 are respectively integrally formed with the ends close to the two side plates 2581, and each end of each side plate 2581 away from the second connecting plate 2586 is connected to a clamping plate 2583, and the two clamping plates 2583 are opened on the sides close to each other. The distance between the two plates 2583 and 2584 gradually decreases along the direction of the virtual axis and then gradually increases. The distance between the middle parts of the two plates 2583 is smaller than the distance between any other points on the two plates 2583. The distance between the middle parts of the two plates 2583 is smaller than the thickness of the hygroscopic plate 259. A placement cavity is provided between the two side plates 2581, and the placement cavity is adapted to the hygroscopic plate 259. 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. The coating 13 is wrapped around the lower guide roller 11 and the upper guide roller 12.

[0063] When the desiccant plate 259 is pulled out from the placement box 258, the desiccant plate 259 no longer blocks the condensation plate 2582, and the humid gas contacts the condensation plate 2582 and condenses into small water droplets, thereby improving the dehumidification capacity.

[0064] The second rotating plate 256 is a bow-shaped plate, and the second rotating plate 256 is bent in the direction away from the coating 13 to avoid the first rotating plate 255, the second rotating plate 256 and the coating 13 needing to pass through the drying chamber 215 and the outlet 219 of the box body 211. 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 plate in the overhead connection unit 25 is rotatably connected. In order to avoid the rotating plate from contacting with 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, and ensure that the second rotating plate 256 does not contact with the coating 13 during rotation.

[0065] When in use, the amount of high-humidity gas and gas humidity flowing out of the top of each box 211 per unit time are determined by the dehumidification data recorded in the past, and the stepper motor 254 rotates. The rotating shaft 4 of the stepper motor 254 rotates the first rotating plate 255, the second rotating plate 256, the first connecting plate 257, and the moisture absorption plate 259 in turn. The moisture absorption plate 259 is drawn out from the placement box 258 to adjust the expansion area of ​​the arc surface of the semicircular box body. The humidity of the humid gas in the lower box body is high, and the amount of humid gas generated is large. The moisture absorption plate 259 is drawn out of the placement box 258 less, and the moisture dissipation capacity per unit time is increased. The humidity of the humid gas in the upper box body is low, and the amount of humid gas generated is small. In order to reduce the consumption of heat, 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 semicircular box body is transferred to the drying chamber 215 with high gas humidity below through the pipeline, and the dry hot air above is circulated for the humid area below, which saves energy and reduces consumption, and does not affect the humidity dissipation. As the hygroscopic plate 259 is pulled out from the placement box 258, the hygroscopic plate 259 no longer blocks the condensation plate 2582, and the humid gas contacts the condensation plate 2582 and condenses into small water droplets, thereby improving the dehumidification effect. The humidity at the outlet 219 can be measured in real time by a humidity measuring instrument, and the open area of ​​the semicircular box body can be adjusted in time, and the adjustment is flexible to adapt to various vertical layered drying boxes 21. The hygroscopic plate 259 is mostly made of a hygroscopic elastic material such as a sponge, and the hygroscopic plate 259 has a strong hygroscopic capacity. When the hygroscopic plate 259 absorbs too much water (the moisture condition of the hygroscopic plate 259 can be judged based on the use time or the measuring instrument), the rotating part of the stepping motor 254 is reversed, and the hygroscopic plate 259 passes through the clamping plate 2583 under the rotation and rotates into the placement box 258. The distance between the two clamping plates 2583 is less than the thickness of the hygroscopic plate 259, and the clamping plate 2583 squeezes out the water in the hygroscopic plate 259 to maintain the continuous hygroscopic capacity of the hygroscopic plate 259.

[0066] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection 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 an open side, 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.

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 (253) is connected to the top plate (251) via the side plates (252); the bottom plate is connected to the outlet (219) of one box (211); the top plate (251) is connected to the inlet (218) of an adjacent box (211); the top plate (251), the side plates (252) and the bottom plate (253) form a semicircular box body; the bottom plate (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 tank (2532) is provided on the top of the arc plate (2531); a liquid outlet (2535) is provided through one end of the arc plate (2531) and the liquid outlet (2535) is connected to the liquid tank (2532); a plurality of support blocks are connected to the top of the liquid tank (2532); A support plate (2533), 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 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 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: 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 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 (259) via a first connecting plate (257); and each of the support plates (253) is connected to a plurality of rotating plates. 3) are connected to a placement box (258) at the top, the moisture absorbing 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 moisture absorbing plate (259), the rotating plate is composed of a plurality of 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 moisture absorbing plate (259).

7. 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).

8. 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.

9. 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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