An online drying system for cardboard production

Abstract

The present invention discloses an on-line drying system for cardboard production, which relates to the technical field of cardboard production. The on-line drying system includes a passage for the cardboard to pass through, and a drying mechanism is arranged in the passage; the passage includes two rectangular frames at both ends, and an upper top plate and a lower bottom plate are arranged between the two rectangular frames; a pair of side plates are symmetrically arranged between the upper top plate and the lower bottom plate, and the side plates can move along the direction perpendicular to the advancing direction of the cardboard; the drying mechanism includes a drying lamp A and / or a nozzle A arranged on the inner wall of the passage. By arranging a passage for the cardboard to pass through on the cardboard production line and arranging a drying mechanism including a drying lamp A and a nozzle inside the passage, during use, the cardboard is dried by the drying lamp A and the nozzle through light irradiation and blowing respectively, so as to realize on-line drying during the cardboard production process.

Description

Technical Field

[0001] The present invention belongs to the technical field of cardboard production, and particularly relates to an on-line drying system for cardboard production. Background Art

[0002] Cardboard is a common paper product in people's lives. It has the advantages of high strength, light weight, sound absorption, heat insulation, recyclability, etc. Therefore, it is widely used in the fields of packaging and transportation, decoration and building materials, etc. With the wide application of cardboard in multiple industries, manufacturers have put forward higher requirements for various characteristics of cardboard. Especially after the cardboard is manufactured into a finished product, due to the process and the use of adhesives, etc., it often contains a certain amount of moisture, resulting in a decrease in its compressive strength. To solve this problem, a drying process is required before the cardboard leaves the factory.

[0003] For example, Chinese Patent Publication No. CN217330602U discloses a cardboard drying device for cardboard production in a carton, which includes a drying chamber and a hot air blower. Inside the drying chamber, there is a transmission steel belt for transporting cardboard. At both ends above the drying chamber, a preheating air outlet and a secondary heating air outlet are respectively welded. A ventilation duct connected to the hot air blower is commonly installed on the preheating air outlet and the secondary heating air outlet; by using the transmission steel belt and the heating plate arranged in the drying chamber, the electric heating wire in the heating plate conducts heat to the heat conduction plate, and the high-temperature hot air in the hot air blower makes the heating plate keep high temperature efficiently, so that the drying structure in contact with the cardboard keeps a constant temperature. The heating plate adopts lifting and moving control to contact the cardboard in different degrees; by setting a preheating air outlet and a secondary heating air outlet between the drying chamber and the ventilation duct, the cardboard can be preheated and secondary heated, ensuring more uniform heating, avoiding the structure of the cardboard curling due to sudden temperature rise and fall, and ensuring the drying quality.

[0004] And a cardboard drying room disclosed in Chinese Patent Publication No. CN105352288A. There is a bench in the room, heating pipes are arranged on one wall, and a moisture exhaust fan is arranged on the opposite wall. The moisture exhaust fan is provided with a control device, and the control device is connected to a temperature and humidity meter inside the room and a temperature and humidity meter outside the room through sensors. The bench in the room of the present invention is used to place cardboard. The heating pipes and the moisture exhaust fan are relatively arranged on the walls on both sides of the cardboard, which can effectively improve the dehumidification effect. And it avoids the problems that the continuous operation of the moisture exhaust fan reduces the indoor temperature, the dehumidification effect is not good, and the energy consumption is large.

[0005] As described above, in the prior art, the cardboard is dried after being produced and taken off the production line, which is laborious and inefficient. Summary of the Invention

[0006] The purpose of the present invention is to provide an on-line drying system for cardboard production. By setting a channel through which the cardboard passes through on the cardboard production line, and arranging a drying mechanism including a drying lamp A and a spray head inside the channel, when in use, the drying lamp A and the spray head are used for illumination and blowing respectively to complete the drying of the cardboard, so as to realize on-line drying during the cardboard production process, and solve the problem of low efficiency in drying the existing cardboard after production offline.

[0007] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0008] The present invention is an on-line drying system for cardboard production, including a channel through which the cardboard passes through. A drying mechanism is arranged inside the channel; the channel includes two rectangular frames at both ends, and an upper top plate and a lower bottom plate are arranged between the two rectangular frames; a pair of side plates are symmetrically arranged between the upper top plate and the lower bottom plate, and the side plates can move along the direction perpendicular to the cardboard traveling direction; the drying mechanism includes a drying lamp A and / or a spray head A arranged on the inner wall of the channel.

[0009] Furthermore, the side plate is a U-shaped plate; groove channels A are arranged on both inner side walls of the U-shaped plate along the direction perpendicular to the cardboard traveling direction, and a drying lamp B and / or a spray head B are arranged inside the groove channels A.

[0010] Furthermore, an exhaust port is arranged on the bottom side surface of the side plate. The spray head B installed inside the groove channel A inclines towards one side of the exhaust port, and the air flow direction forms an angle ɑ with the cardboard surface, and ɑ gradually increases along the direction away from the exhaust port.

[0011] Furthermore, a first installation area is arranged along the central axis of the upper top plate and the lower bottom plate, and second installation areas are respectively arranged on both sides of the first installation area; drying lamps A and / or spray heads A are installed in both the first installation area and the second installation area; the air flow direction of the spray head A installed in the first installation area is perpendicular to the cardboard surface; the two spray heads A installed in the second installation areas on both sides of the first installation area are in a "V" shape, and the spray head A installed in the second installation area inclines away from the first installation area, and the air flow direction forms an angle β with the cardboard surface, and β gradually increases along the direction away from the exhaust port; and β > ɑ.

[0012] Furthermore, groove channels B are respectively arranged on the inner side walls of the two open ends of the U-shaped plate along the direction parallel to the cardboard traveling direction, and the groove channels B are perpendicular to the length direction of the groove channels A; and sealing brushes that slide along the outer side walls of the upper top plate and the lower bottom plate are arranged inside the groove channels B.

[0013] Further, it further includes a control mechanism for controlling the U-shaped plate to move back and forth along the direction perpendicular to the traveling direction of the cardboard. The control mechanism includes a bracket installed on the machine frame. The bracket includes several columns arranged on the edge side of the machine frame, and a connecting rod is provided at the top of the columns. It further includes an electric telescopic rod provided on one side of the column at the middle position. The end of the electric telescopic rod is connected to the U-shaped plate, and a guiding telescopic sleeve rod is connected between the U-shaped plate and the column on both sides of the electric telescopic rod.

[0014] Further, a roller for conveying the cardboard is provided on the machine frame and penetrates through the U-shaped plate movably, and a through hole for the roller to pass through movably is provided on the U-shaped plate.

[0015] Further, both the spray head B and the spray head A are connected to a gas supply device, and the exhaust port is connected to an air extraction device. The air extraction device is further connected to a cover provided at the through hole, and the roller penetrates through the cover.

[0016] Further, a pair of humidity detection mechanisms are respectively provided above and below the cardboard in the channel. The humidity detection mechanism is connected to a controller, and the controller is connected to the air extraction device and the gas supply device.

[0017] Further, the humidity detection mechanism includes two humidity sensors respectively provided directly below or directly above the two second installation areas, and a detection sleeve for installing the humidity sensors. At least two fixing rods connected to the upper top plate and the lower bottom plate are provided on the detection sleeve. The detection sleeve is inclined with a gradually decreasing height along the direction close to the first installation area, and a flared air inlet structure is connected to it near the first installation area, and the humidity sensor is arranged inside the detection sleeve.

[0018] The present invention has the following beneficial effects:

[0019] The present invention sets a channel for the cardboard to penetrate through on the cardboard production line, and a drying mechanism including a drying lamp A and a spray head is provided inside the channel. During use, the cardboard is dried by using the drying lamp A and the spray head for illumination and blowing respectively, realizing online drying during the cardboard production process. Since the side plates can move along the direction perpendicular to the traveling direction of the cardboard, the gap between the two side plates can be adjusted according to the width of the cardboard during use, so that the device can be adaptively adjusted according to the width of the cardboard.

[0020] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. 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.

[0022] Figure 1 Schematic diagram of the channel structure of the present invention Figure 1 ;

[0023] Figure 2 Schematic diagram of the channel structure of the present invention Figure 2 ;

[0024] Figure 3 is Figure 2 Partial enlarged view of part A in

[0025] Figure 4 is Figure 1 front view of

[0026] Figure 5 Schematic diagram of the side plate structure of the present invention. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "perimeter", etc. indicating orientation or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0029] As Figures 1-5 shown, an on-line drying system for cardboard production, the drying system includes a channel 1 through which the cardboard 100 passes through, and a drying mechanism including drying lamps A and nozzles is provided on the inner wall of the channel 1. During use, the drying lamps A and nozzles are used for illumination and blowing respectively to improve the drying efficiency of the cardboard.

[0030] And in the present invention, the channel 1 includes two rectangular frames 11 located at both ends, and an upper top plate 12 and a lower bottom plate 13 are arranged between the two rectangular frames 11; a pair of side plates 14 are arranged symmetrically between the upper top plate 12 and the lower bottom plate 13; in the present invention, the rectangular frames 11 are used to form a framework, which is convenient for installing and supporting the upper top plate 12, the lower bottom plate 13 and the side plates 14. Since the side plates 14 can move along the direction perpendicular to the traveling direction of the cardboard 100, the gap between the two side plates 14 can be adjusted according to the width of the cardboard during use, so as to realize the adaptive adjustment of the device according to the width of the cardboard.

[0031] By adjusting the width of the channel 1 to adapt to the width of the cardboard as much as possible, energy loss caused by excessive internal space can be avoided.

[0032] In the present invention, the channel 1 is installed on a frame 2, wherein the rectangular frame 11 is fixedly connected to the frame 2. At the same time, a bracket is arranged on the frame 2, and a control mechanism for controlling the U-shaped plate to move back and forth along the direction perpendicular to the traveling direction of the cardboard 100, which includes an electric telescopic rod 23 and a guiding telescopic sleeve rod 24, is arranged on the bracket. At the same time, the bracket includes several columns 21 arranged on the edge side of the frame 2, and a connecting rod 22 is arranged at the top of the column 21. The electric telescopic rod 23 is installed on one column 21 located in the middle position, and the guiding telescopic sleeve rod 24 is arranged between the U-shaped plate and the column 21 on both sides of the electric telescopic rod 23.

[0033] In order to better convey the cardboard 100 passing through the channel 1, a roller 201 for conveying the cardboard 100 is arranged on the frame 2 and penetrates through the U-shaped plate movably, and a through hole 145 through which the roller 201 passes movably is arranged on the U-shaped plate.

[0034] When the two U-shaped plates are controlled to move outward to meet the width of the corresponding cardboard 100, the corresponding drying lamps B and nozzles B arranged on the two inner side walls of the U-shaped plate are turned on at this time to dry the cardboard 100 at the position directly below the U-shaped plate. At the same time, chute channels A141 are arranged on the two inner side walls of the U-shaped plate along the direction perpendicular to the traveling direction of the cardboard 100, and the drying lamps B and the nozzles B are both installed in the chute channels A141 to prevent the drying lamps B and the nozzles B from protruding from the chute channels and affecting the pulling of the U-shaped plate.

[0035] In the present invention, the nozzle B installed in the groove A141 is inclined toward one side of the exhaust port 142, and the angle between its airflow direction and the surface of the paperboard 100 is ɑ, and ɑ gradually increases in the direction away from the exhaust port 142; and the upper top plate 12 and the lower bottom plate 13 are provided with a first installation area along the central axis, and second installation areas are provided on both sides of the first installation area; drying lamps A and / or nozzles A are installed in the first installation area and the second installation area; the airflow direction of the nozzles A installed in the first installation area is perpendicular to the surface of the paperboard 100; the nozzles installed in the second installation areas on both sides of the first installation area are perpendicular to the surface of the paperboard 100. The two nozzles A are in an "eight" shape and are installed in the second installation area. The nozzle A is inclined in the direction away from the first installation area, and the angle between the air flow direction and the surface of the cardboard 100 is β, which gradually increases in the direction away from the exhaust port 142; and β>ɑ. At the same time, an exhaust port 142 is provided on the bottom side of the side plate 14; through the above arrangement, it is convenient to control the gas in the channel 1 to be evenly blown to both sides through the action of the nozzles B and the nozzles A, and at the same time, the inclination angle increases step by step, so as to better and more timely exhaust the moist air in the channel 1 and avoid the internal moisture affecting the drying.

[0036] The inner sidewalls of the two open ends of the U-shaped plate are provided with grooves B143, parallel to the direction of travel of the paperboard 100, and perpendicular to the length of groove A141. Sealing brushes 144 are provided within grooves B143, sliding along the outer walls of the upper top plate 12 and the lower bottom plate 13. The brushes facilitate sealing between the U-shaped plate and the upper top plate 12 and the lower bottom plate 13, reducing the amount of gas discharged through the through-holes 145 and the exhaust port 142, thereby reducing the amount of dry gas that escapes. In the present invention, heat recovery and exhaust gas treatment are required for the exhaust gas discharged after drying.

[0037] like Figure 3 , nozzle B and nozzle A are both connected to the air supply device, and the exhaust port 142 is connected to the air extraction device; the air extraction device is also connected to the cover set at the through hole 145, and the roller 201 passes through the cover; a pair of humidity detection mechanisms are also provided in the channel 1, respectively located above and below the cardboard 100, and the humidity detection mechanisms are connected to the controller, and the controller is connected to the air extraction device and the air supply device.

[0038] like Figure 5, the humidity detection mechanism includes two humidity sensors respectively arranged directly below or directly above the two second installation areas, and a detection sleeve 16 for installing the humidity sensors. At least two fixing rods 17 connected to the upper top plate 12 and the lower bottom plate 13 are provided on the detection sleeve 16; the detection sleeve 16 is inclined with its height gradually decreasing in the direction close to the first installation area, and a flared air inlet structure 161 is connected to it near the first installation area, and the humidity sensor is arranged inside the detection sleeve 16; the humidity detection mechanism is used to detect the drying condition of the cardboard passing through the middle area of the channel 1, which is convenient for controlling the jet speed of the nozzles located at the front end and the rear end of the channel 1, the supply temperature of the air supply device, the air extraction speed of the air extraction device, and the power of the drying lamp for adjustment.

[0039] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0040] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific implementation manners. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An online drying system for cardboard production, characterized by: It comprises a channel (1) for cardboard (100) to pass through, wherein a drying mechanism is provided in the channel (1); The channel (1) comprises two rectangular frames (11) at both ends, and an upper top plate (12) and a lower bottom plate (13) are provided between the two rectangular frames (11); A pair of side panels (14) may be symmetrically arranged between the upper top panel (12) and the lower bottom panel (13) along a direction perpendicular to the travel direction of the paperboard (100); The drying mechanism comprises a drying lamp A and / or a nozzle A arranged on the inner wall of the channel (1); The side plate (14) is a U-shaped plate; Both inner side walls of the U-shaped plate are provided with grooves A (141) perpendicular to the direction in which the paperboard (100) travels, and drying lamps B and / or nozzles B are provided in the grooves A (141); An exhaust port (142) is provided on the bottom side of the side panel (14), and a nozzle B installed in the channel A (141) is inclined toward one side of the exhaust port (142), and an angle ɑ is formed between the direction of the air flow and the surface of the paperboard (100), and the angle ɑ gradually increases in a direction away from the exhaust port (142); The invention also includes a control mechanism for controlling the U-shaped plate to move back and forth along the direction perpendicular to the travel of the paperboard (100), wherein the control mechanism includes a bracket mounted on the frame (2), the bracket including a plurality of pillars (21) arranged on the edge side of the frame (2), and a connecting rod (22) is provided on the top of the pillars (21).

2. The online drying system for cardboard production according to claim 1, characterized in that: The upper top plate (12) and the lower bottom plate (13) are provided with a first installation area along the central axis, and second installation areas are provided on both sides of the first installation area; a drying lamp A and / or a nozzle A are installed in both the first installation area and the second installation area; The airflow direction of the nozzle A installed in the first installation area is perpendicular to the surface of the paperboard (100); The two nozzles A installed in the second installation area on both sides of the first installation area are in an "eight" shape, and the nozzles A installed in the second installation area are inclined in a direction away from the first installation area, and the angle between their airflow directions and the surface of the paperboard (100) is β, and the β gradually increases in a direction away from the exhaust port (142); and β>ɑ.

3. The online drying system for cardboard production according to claim 2, characterized in that: Grooves B (143) are respectively provided on the inner side walls of the two open ends of the U-shaped plate in a direction parallel to the travel direction of the paperboard (100), and the grooves B (143) are perpendicular to the length direction of the grooves A (141); A sealing brush (144) is provided in the groove B (143) and slides along the outer side walls of the upper top plate (12) and the lower bottom plate (13).

4. The online drying system for cardboard production according to claim 1, characterized in that: The control mechanism further comprises an electric telescopic rod (23) arranged on one side of the support column (21) at a middle position, the end of the electric telescopic rod (23) being connected to a U-shaped plate, and a guide telescopic sleeve rod (24) being connected between the U-shaped plates and the support column (21) on both sides of the electric telescopic rod (23).

5. The online drying system for cardboard production according to claim 4, characterized in that: The frame (2) is provided with a roller (201) that movably passes through the U-shaped plate and is used to convey the cardboard (100), and the U-shaped plate is provided with a through hole (145) through which the roller (201) movably passes.

6. The online drying system for cardboard production according to claim 5, characterized in that: The nozzle B and the nozzle A are both connected to the air supply device, and the exhaust port (142) is connected to the air extraction device; The air extraction device is also connected to a cover provided at the through hole (145), and the supporting roller (201) passes through the cover.

7. The online drying system for cardboard production according to claim 4, characterized in that: A pair of humidity detection mechanisms are also provided in the channel (1), located above and below the paperboard (100) respectively. The humidity detection mechanisms are connected to a controller, and the controller is connected to an air extraction device and an air supply device.

8. The online drying system for cardboard production according to claim 7, characterized in that: The humidity detection mechanism comprises two humidity sensors respectively arranged directly below or directly above the two second installation areas, and a detection sleeve (16) for mounting the humidity sensors, wherein the detection sleeve (16) is provided with at least two fixing rods (17) connected to the upper top plate (12) and the lower bottom plate (13); The detection sleeve (16) is arranged to be tilted and gradually lowered in height in a direction close to the first installation area, and is connected to a bell-mouth air inlet structure (161) close to the first installation area. The humidity sensor is arranged inside the detection sleeve (16).

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