A paperboard moisture control system

Abstract

This utility model relates to the field of paperboard manufacturing technology, and in particular to a paperboard humidity control system. It mainly solves the problems of poor humidity control uniformity and low adjustment efficiency in the existing technology of corrugated paperboard production. It includes a controller, a human-machine interface, a steam generator, an air heater, an air pump, at least one actuator, at least one steam pipe, at least one air pipe, at least one first electromagnetic switch valve, and at least one second electromagnetic switch valve. The actuator includes a housing, a humidity sensor, several humidifying nozzles, and an exhaust fan. The housing has a chamber, and the housing is provided with an inlet, an outlet, an air inlet, and an air outlet communicating with the chamber. The inlet and outlet are distributed on the horizontal sides of the housing for conveying paperboard. The air outlet is distributed on the upper side of the housing, and the exhaust fan is located at the air outlet. The housing has a steam chamber, and the nozzles are arranged in a matrix in the chamber.

Description

Technical Field

[0001] This utility model relates to the field of paperboard production and manufacturing technology, and in particular to a paperboard humidity control system. Background Technology

[0002] With the continuous development of the times, corrugated cardboard has become increasingly widely used. Common corrugated cardboard consists of one layer of corrugated paper and two sidings. The two sidings are located on both sides of the corrugated paper and are glued to the crests of the corrugated paper to form a high-strength corrugated cardboard. The production of corrugated cardboard requires the following steps: pressing the roll of base paper into corrugations, gluing and bonding, slitting and creasing, cross-cutting, and collecting and packaging.

[0003] For example, Chinese Patent Application No. 202010636395.X discloses a corrugated cardboard production line, which includes a feeding device for installing corrugated paper rolls, a corrugating machine for corrugating and gluing the corrugated paper, an edge trimming device for cutting the edge material of the glued corrugated cardboard, a cross-cutting device for cross-cutting the corrugated cardboard, and a packing device for packaging the cross-cut corrugated cardboard. The packing device includes a support plate and a column. The bottom of the support plate is provided with a rotating component for driving the support plate to rotate. The column has a longitudinal groove on the surface facing the support plate. A lifting screw is rotatably installed in the longitudinal groove. A slider that is threadedly engaged with the lifting screw is slidably installed in the longitudinal groove. An installation component for installing packing film rolls is fixedly installed on the surface of the slider facing the support plate.

[0004] The quality of corrugated cardboard depends on the control of the moisture content of its base paper, which can vary by 6%-12% due to factors such as the manufacturer, storage environment, and natural climate changes. Traditional manufacturers typically maintain stable humidity during corrugated cardboard production by controlling the humidity within the factory. However, this control method relies heavily on manual experience for adjustment, resulting in slow response times, susceptibility to environmental fluctuations, and the use of a single humidity sensor, which leads to poor humidity uniformity in large production facilities. Utility Model Content

[0005] Therefore, in view of the above problems, this utility model provides a paperboard humidity control system, which mainly solves the problems of poor humidity control uniformity and low adjustment efficiency in the production process of corrugated paperboard in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cardboard humidity control system includes a controller, a human-machine interface, a steam generator, an air heater, an air pump, at least one actuator, at least one steam pipe, at least one air pipe, at least one first electromagnetic switch valve, and at least one second electromagnetic switch valve. The actuator includes a housing, a humidity sensor, several humidifying nozzles, and an exhaust fan. The housing has a chamber, and the housing has an inlet, an outlet, an air inlet, and an air outlet communicating with the chamber. The inlet and outlet are distributed on the lateral sides of the housing for conveying cardboard. The air outlet is located on the upper side of the housing, and the exhaust fan is located at the air outlet. The housing contains... The steam chamber contains nozzles arranged in a matrix and connected to the chamber via steam pipes. The output of the steam generator is connected to the steam chamber via a steam pipe. Each of the first electromagnetic valves is mounted on the steam pipe. The output of the air heater is connected to the air inlet via an air pipe. Each of the second electromagnetic valves is mounted on the air pipe. The air pump is located at the input of the air heater. The human-machine interface and humidity sensor are electrically connected to the input of the controller. The steam generator, air heater, air pump, first electromagnetic valve, second electromagnetic valve, and exhaust fan are electrically connected to the output of the controller.

[0008] Furthermore, the housing is equipped with a clamping and conveying mechanism, which is positioned horizontally between the inlet and outlet, and divides the chamber into an upper chamber and a lower chamber.

[0009] Furthermore, the clamping and conveying mechanism includes an upper conveying component and a lower conveying component, and a conveying channel is formed between the upper conveying component and the lower conveying component. Both the upper conveying component and the lower conveying component include a driving roller, a driven roller, and at least three conveyor belts. Each of the conveyor belts is wound around the driving roller and the driven roller and is distributed at intervals along the axial direction of the driving roller.

[0010] Furthermore, both the driving roller and the driven roller have annular grooves recessed on their circumferential surfaces, and each of the conveyor belts is embedded in the annular groove.

[0011] Furthermore, a connecting pipe is provided on the outer side of the box body, connecting the upper chamber and the lower chamber, and an air pump is provided on the connecting pipe.

[0012] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This paperboard humidity control system, by installing various actuators in the corrugating, gluing, slitting, and cross-cutting production equipment, and through a closed-loop control system integrating a controller, multi-point humidity sensors, and distributed actuators, achieves dynamic monitoring and precise adjustment of humidity in various equipment on the paperboard production line. The steam generator, combined with a matrix nozzle design, can quickly increase local humidity. The air heater and air pump combination forms a hot air drying system, achieving coordinated temperature and humidity control. Simultaneously, multi-channel solenoid valve control allows for independent adjustment of humidification / drying intensity in different areas, solving the problem of poor humidity uniformity in large-area factories. The automated control response speed is more than 80% faster than manual adjustment, and the paperboard moisture content fluctuation can be controlled within ±1.5%, significantly improving the paperboard forming strength and product qualification rate. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0014] Figure 2 This is a cross-sectional view of the actuator in an embodiment of the present invention;

[0015] Figure 3 This is a top view of the clamping and conveying mechanism in an embodiment of this utility model;

[0016] Figure 4 This is a circuit module diagram of an embodiment of the present utility model. Detailed Implementation

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0018] The embodiment of this utility model is as follows:

[0019] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a cardboard humidity control system includes a controller 1, a human-machine interface 2, a steam generator 3, an air heater 4, an air pump 5, three actuators, three steam pipes 6, three air pipes 7, three first electromagnetic switching valves 8, and three second electromagnetic switching valves 9. Each actuator includes a housing 10, a humidity sensor 11, several humidifying nozzles 12, and an exhaust fan 13. The housing 10 has a chamber 101. The housing 10 is equipped with an inlet 102, an outlet 103, an air inlet 104, and an air outlet 105 communicating with the chamber. The inlet 102 and outlet 103 are distributed on the lateral sides of the housing 10 for conveying cardboard. The air outlet 105 is located on the upper side of the housing 10. The exhaust fan 13 is located at the air outlet. The housing 10 contains... A steam chamber 106 is provided, and each of the nozzles 12 is arranged in a matrix within the chamber 101 and is connected to the steam chamber 106 via steam branch pipes 107. The output end of the steam generator 3 is connected to the steam chamber 107 via a steam pipe 6. Each of the first electromagnetic switch valves 8 is located on the steam pipe 107. The output end of the air heater 4 is connected to the air inlet 104 via an air pipe 7. Each of the second electromagnetic switch valves 9 is located on the air pipe 7. The air pump 5 is located at the input end of the air heater 4. The human-machine interface 2 and the humidity sensor 11 are electrically connected to the input end of the controller 1. The steam generator 3, the air heater 4, the air pump 5, the first electromagnetic switch valve 8, the second electromagnetic switch valve 9, and the exhaust fan 13 are electrically connected to the output end of the controller 1.

[0020] This paperboard humidity control system integrates various actuators installed in production equipment such as corrugating, gluing, slitting, and cross-cutting. Through a closed-loop control system combining an integrated controller 1, multi-point humidity sensors 11, and distributed actuators, it achieves dynamic monitoring and precise adjustment of humidity across all equipment on the paperboard production line. A steam generator 3, combined with a matrix-style humidifying nozzle 12, rapidly increases local humidity. An air heater 4 and an air pump 5 form a hot air drying system, enabling coordinated temperature and humidity control. Simultaneously, multi-channel solenoid valve control allows independent adjustment of humidification / drying intensity in different areas, solving the problem of poor humidity uniformity in large-area factories. The automated control response speed is over 80% faster than manual adjustment, controlling paperboard moisture content fluctuations within ±1.5%, significantly improving paperboard forming strength and product qualification rate.

[0021] Furthermore, the housing 1 is equipped with a clamping and conveying mechanism 20, which is horizontally positioned between the inlet 102 and the outlet 103. The clamping and conveying mechanism 20 divides the chamber 101 into an upper chamber 100 and a lower chamber 200, and divides the chamber 101 into upper and lower independently adjustable areas, realizing differentiated humidity treatment on both sides of the cardboard. The upper chamber 100 can quickly permeate the surface of the cardboard with steam, while the lower chamber 200 controls the humidity of the substrate through hot air circulation, avoiding cardboard delamination caused by excessive moisture absorption. The chamber separation design ensures that steam and hot air do not interfere with each other, improving thermal efficiency by about 35%. At the same time, the conveying mechanism forms a physical isolation zone, reducing heat loss during the processing.

[0022] Furthermore, the clamping and conveying mechanism 20 includes an upper conveying component 210 and a lower conveying component 220, with a conveying channel 230 formed between the upper conveying component 210 and the lower conveying component 220. Both the upper conveying component 210 and the lower conveying component 220 include a drive roller 201, a driven roller 202, and at least three conveyor belts 203, preferably five. Each of the conveyor belts 203 is wound around the drive roller 201 and the driven roller 202 and is spaced apart along the axial direction of the drive roller 201. The conveying structure with multiple conveyor belts 203 spaced apart ensures the smooth conveying of the cardboard while forming a strip-shaped ventilation gap, allowing steam and hot air to penetrate the gap to achieve simultaneous double-sided processing. Compared with traditional full-sided conveyor belts, the humidity penetration efficiency is increased by more than 40%, and the spaced design avoids the cardboard from getting damp and deforming, making it particularly suitable for humidity control of high grammage cardboard.

[0023] Specifically, both the driving roller 201 and the driven roller 202 have annular grooves 204 recessed on their circumferential surfaces. Each of the conveyor belts 203 is embedded in the annular grooves 204. The embedded fit between the annular grooves 204 and the conveyor belts 203 effectively prevents radial displacement of the conveyor belts 203 in high temperature and high humidity environments, ensuring the accuracy of the paperboard conveying trajectory. The design of the annular grooves 204 reduces the contact area between the conveyor belts 203 and the roller surface, reducing the risk of local paper embrittlement caused by frictional heat generation and extending the service life of the belts.

[0024] In this embodiment, a connecting pipe 14 is provided on the outer side of the box 10, connecting the upper chamber 100 and the lower chamber 200. An air pump 15 is provided on the connecting pipe 14. The airflow circulation between the upper and lower chambers is realized through the connecting pipe 14. With the help of the air pump 15, a directional air pressure gradient is formed. The saturated humid air in the upper chamber 100 can be introduced into the lower chamber 200 through the connecting pipe 14 for secondary use, thereby increasing the steam utilization rate by 25%. At the same time, the forced circulation system eliminates the humidity dead zone in the corner of the chamber, reducing the humidity difference in the chamber from ±8% in the traditional structure to ±2%, ensuring the uniformity of cardboard processing.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A paperboard humidity control system, characterized in that: The system includes a controller, a human-machine interface, a steam generator, an air heater, an air pump, at least one actuator, at least one steam pipe, at least one air pipe, at least one first electromagnetic switch valve, and at least one second electromagnetic switch valve. The actuator includes a housing, a humidity sensor, several humidifying nozzles, and an exhaust fan. The housing has a chamber, and the housing has an inlet, an outlet, an air inlet, and an air outlet communicating with the chamber. The inlet and outlet are located on the lateral sides of the housing for conveying cardboard. The air outlet is located on the upper side of the housing, and the exhaust fan is located at the air outlet. The housing also contains a steam chamber. The nozzles are arranged in a matrix within the chamber and are connected to the steam chamber via steam pipes. The output of the steam generator is connected to the steam chamber via a steam pipe. Each of the first electromagnetic switch valves is located on the steam pipe. The output of the air heater is connected to the air inlet via an air pipe. Each of the second electromagnetic switch valves is located on the air pipe. The air pump is located at the input of the air heater. The human-machine interface and humidity sensor are electrically connected to the input of the controller. The steam generator, air heater, air pump, first electromagnetic switch valve, second electromagnetic switch valve, and exhaust fan are electrically connected to the output of the controller.

2. The paperboard humidity control system according to claim 1, characterized in that: The housing is equipped with a clamping and conveying mechanism, which is positioned horizontally between the inlet and outlet, and divides the chamber into an upper chamber and a lower chamber.

3. The paperboard humidity control system according to claim 2, characterized in that: The clamping and conveying mechanism includes an upper conveying component and a lower conveying component, and a conveying channel is formed between the upper conveying component and the lower conveying component. The upper conveying component and the lower conveying component each include a driving roller, a driven roller and at least three conveyor belts. Each of the conveyor belts is wound around the driving roller and the driven roller and is distributed at intervals along the axial direction of the driving roller.

4. The paperboard humidity control system according to claim 3, characterized in that: Both the driving roller and the driven roller have annular grooves recessed on their circumferential surfaces, and each of the conveyor belts is embedded in the annular groove.

5. The paperboard humidity control system according to claim 2, characterized in that: The outer side of the box is provided with a connecting pipe that connects the upper chamber and the lower chamber, and an air pump is provided on the connecting pipe.

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