Papermaking machine ventilation equipment with multi-channel design

Abstract

The utility model discloses paper machine ventilation equipment with a multi-channel design, and relates to the field of paper machine ventilation. Comprising a main body, a power line, a power plug, a control device, a control assembly module, a PLC, an adjusting valve, an adjustable air opening, an air duct filter, a first frequency conversion fan, a second frequency conversion fan, a first heat exchanger, a second heat exchanger, a first driving shaft, a second driving shaft, a first air duct fan, a second air duct fan, a first air speed sensor and a second air speed sensor. The variable-frequency fan dynamically adjusts airflow, the heat exchanger recovers waste gas sensible heat to improve the energy utilization rate, the air speed sensor monitors the airflow speed in real time and feeds data back to the PLC, the adjusting valve and the adjustable air opening flexibly distribute the airflow flow and direction, and the air duct filter ensures that the airflow is clean. The multi-channel design enables air flow to be evenly distributed, local uneven drying is avoided, and the papermaking efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of paper machine ventilation, specifically a paper machine ventilation device with a multi-channel design. Background Technology

[0002] With the rapid development of the papermaking industry, ventilation equipment, as a crucial component of papermaking machines, directly impacts the drying speed and quality of paper. Currently, ventilation equipment in papermaking machines primarily guides airflow through duct systems, providing necessary airflow support for processes such as paper drying and forming. The performance of ventilation equipment is of great significance for improving production efficiency and paper quality. An existing ventilation device for a pulping and papermaking machine (publication number: CN208055757U) has the following drawbacks and requires further improvement.

[0003] Traditional paper machine ventilation equipment uses a single-channel design, which results in significant uneven airflow distribution. A single channel makes it difficult to optimize and adjust the airflow to meet the needs of different areas of the paper machine, easily leading to situations where some areas have excessive airflow while others have insufficient airflow, affecting the uniformity of paper drying.

[0004] Traditional equipment has failed to effectively control the energy consumption of fans, resulting in low energy efficiency. Long-term use not only increases production costs but also hinders the achievement of green and environmentally friendly goals. Utility Model Content

[0005] The main objective of this invention is to provide a ventilation device for a paper machine with a multi-channel design, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a ventilation device for a paper machine with a multi-channel design, wherein a power cord is provided on one side of the main body, a power plug is installed at one end of the power cord, a control device is installed on the top of the main body, the control device is internally electrically connected to a control component module, the control component module is electrically connected to a PLC controller, the PLC controller is electrically connected to a regulating valve, an adjustable air outlet is installed on one side of the regulating valve, and an air duct filter is installed at one end of the adjustable air outlet;

[0007] A first variable frequency fan is installed on the inner side of the main body, a first heat exchanger is installed on one side of the first variable frequency fan, a first drive shaft is installed on one side of the first heat exchanger, a first duct fan is installed on one side of the first drive shaft, and a first wind speed sensor is installed on the top of the first duct fan.

[0008] A second variable frequency fan is installed inside the main body. A second heat exchanger is installed on one side of the second variable frequency fan. A second drive shaft is installed on one side of the second heat exchanger. A second duct fan is installed on one side of the second drive shaft. A second wind speed sensor is installed at the top of the second duct fan.

[0009] Preferably, the regulating valve is fixedly connected to the inner wall of the main body by a snap-fit ​​method. The connecting hole diameter of the regulating valve is 12mm, and its inner side is connected to an adjustable air outlet by a threaded engagement method. The adjustable air outlet is made of stainless steel and its engagement angle range is 0°-90°.

[0010] Preferably, the first heat exchanger and the first variable frequency fan are connected by an integrated fastening bolt with a diameter of 8mm. The first heat exchanger is movably connected to the first drive shaft through a hinge structure with a pin diameter of 6mm and an allowable rotation angle of 15° for the movable connection.

[0011] Preferably, the first duct fan is mounted on the first drive shaft via an embedded bearing. The embedded bearing has an inner diameter of 10mm and an outer diameter of 20mm. The fan blades of the first duct fan are designed with a 45° inclination and consist of 6 blades evenly distributed around the circumference.

[0012] Preferably, the first wind speed sensor is fixed to the top of the first air duct fan by a grooved slide rail. The slide rail is made of polytetrafluoroethylene material and has a sliding gap of 0.2mm. The first wind speed sensor and the PLC controller are electrically connected by a shielded wire.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Through the linkage design of the PLC controller with regulating valves and adjustable air vents, precise control of airflow and direction can be achieved, ensuring uniform airflow in each channel. Simultaneously, the first and second wind speed sensors monitor wind speed data in real time and feed it back to the PLC controller. The PLC controller automatically adjusts the speed of the first and second variable frequency fans and the opening of the regulating valves based on the data, further optimizing airflow distribution. Furthermore, the addition of a duct filter effectively filters impurities in the air, ensuring airflow quality and preventing airflow obstruction caused by dust or particulate matter accumulation.

[0015] 2. The variable frequency fan, precisely controlled by a PLC controller, adjusts its speed according to actual needs, avoiding unnecessary energy waste. Simultaneously, the heat exchanger recovers heat from the exhaust airflow and transfers it to fresh air, effectively reducing heat loss and thus lowering the overall energy consumption of the equipment. Furthermore, the inclusion of control module and control device ensures efficient and stable system operation, further supporting the achievement of energy-saving goals. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] In the diagram: 1. Main body; 2. Power cord; 3. Power plug; 4. Control device; 5. Control component module; 6. PLC controller; 7. Adjusting valve; 8. Adjustable air outlet; 9. Air duct filter; 101. First variable frequency fan; 102. Second variable frequency fan; 111. First heat exchanger; 112. Second heat exchanger; 121. First drive shaft; 122. Second drive shaft; 131. First air duct fan; 132. Second air duct fan; 141. First wind speed sensor; 142. Second wind speed sensor. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0021] Please see Figure 1 This utility model provides a technical solution:

[0022] A ventilation device for a paper machine with a multi-channel design, wherein a power cord 2 is provided on one side of the main body 1, a power plug 3 is installed at one end of the power cord 2, a control device 4 is installed on the top of the main body 1, the control device 4 is electrically connected to a control component module 5, the control component module 5 is electrically connected to a PLC controller 6, the PLC controller 6 is electrically connected to a regulating valve 7, an adjustable air outlet 8 is installed on one side of the regulating valve 7, and an air duct filter 9 is installed at one end of the adjustable air outlet 8;

[0023] A first variable frequency fan 101 is installed inside the main body 1. A first heat exchanger 111 is installed on one side of the first variable frequency fan 101. A first drive shaft 121 is installed on one side of the first heat exchanger 111. A first duct fan 131 is installed on one side of the first drive shaft 121. A first wind speed sensor 141 is installed at the top of the first duct fan 131.

[0024] A second variable frequency fan 102 is installed inside the main body 1. A second heat exchanger 112 is installed on one side of the second variable frequency fan 102. A second drive shaft 122 is installed on one side of the second heat exchanger 112. A second duct fan 132 is installed on one side of the second drive shaft 122. A second wind speed sensor 142 is installed at the top of the second duct fan 132.

[0025] Within the main structure of the device, the first and second variable frequency fans are respectively installed on both sides of the main body. This symmetrical layout design enables uniform airflow distribution because both fans simultaneously supply air to the heat exchanger, effectively avoiding the uneven flow caused by single-sided air supply. The variable frequency fans are fixedly connected to the heat exchanger via flanges, the diameter of which is designed to precisely match the fan outlet and the heat exchanger inlet to ensure seamless airflow. The heat exchanger is connected to the duct fan via a high-efficiency splined drive shaft. This splined structure ensures efficient torque transmission while reducing power loss. The axial length of the drive shaft is optimized to fit the compact layout within the main body. A wind speed sensor is installed at the center of the duct fan, securely mounted with a mounting bracket and connected to the PLC controller via a cable for real-time monitoring of wind speed data.

[0026] The regulating valve is positioned between the heat exchanger and the air duct, secured by a high-sealing threaded connection or flange connection. Threaded connections offer convenient installation and maintenance, while flange connections, due to their high strength and pressure resistance, are a reliable choice for long-term operation. This connection method not only ensures controllable and airtight airflow but also reduces the risk of leakage caused by equipment vibration or airflow fluctuations, thus significantly improving the overall system stability and operating efficiency. The other end of the valve connects to an adjustable air outlet, which features a rotatable design to flexibly change the airflow direction to adapt to different operating requirements. An air duct filter is installed at the end of the adjustable air outlet, secured by a slot for easy maintenance and replacement. The filter's function is to remove impurities from the airflow, ensuring the cleanliness of the air entering the system.

[0027] The power cord provides power to the system through the power plug. The control device is internally connected to the control component module, which is further connected to the PLC controller via a cable. The PLC controller is responsible for receiving signals from the sensors and sending control commands to the actuators such as fans and valves.

[0028] When the equipment starts up, the power plug connects the external power supply to the system, and the PLC controller begins initialization and monitors the initial state of the sensors. The first and second variable frequency fans start under the command of the PLC controller, and the resulting airflow sequentially enters the heat exchanger. After heat recovery, the air is transferred to the duct fans via the drive shaft. The splined structure of the drive shaft ensures smooth and efficient rotation of the duct fans, evenly distributing the heat-exchanged air to different channels.

[0029] An anemometer collects airflow velocity data in real time within the duct and transmits the data to the PLC controller. The anemometer's measurement range is 0.1 to 20 m / s, with a sensitivity of ±0.05 m / s, accurately capturing airflow changes and providing timely feedback. The PLC controller dynamically adjusts the fan speed based on the set wind speed target and controls the airflow flow and direction via regulating valves to ensure uniform airflow distribution within each channel. If the wind speed in a particular channel deviates from the preset range, the PLC controller immediately adjusts the opening of the relevant valves or the fan's output power.

[0030] Airflow enters the adjustable vent through the regulating valve, and after being directed in an optimized direction, enters the paper drying area. An air duct filter at the air outlet filters out particulate matter from the air, preventing dust from entering the paper or clogging the ventilation system. Simultaneously, a heat exchanger recovers sensible heat from the exhaust gas using highly thermally conductive materials, transferring the heat to fresh air and significantly improving the equipment's energy efficiency.

[0031] The realization of equipment functions relies on precise coordination and closed-loop control between components. The variable frequency fan provides a controllable power source by dynamically adjusting its speed, the heat exchanger optimizes airflow temperature, the wind speed sensor monitors airflow conditions within the channel, and the PLC controller processes all real-time data to execute optimization strategies. Adjustable valves and adjustable air vents enable flexible airflow distribution, and duct filters ensure airflow cleanliness.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ventilation device for a paper machine with a multi-channel design, comprising a main body (1), a PLC controller (6), and an air duct filter (9), characterized in that: A power cord (2) is provided on one side of the main body (1), and a power plug (3) is installed at one end of the power cord (2). A control device (4) is installed on the top of the main body (1). The control device (4) is electrically connected to a control component module (5). The control component module (5) is electrically connected to a PLC controller (6). The PLC controller (6) is electrically connected to a regulating valve (7). An adjustable air vent (8) is installed on one side of the regulating valve (7). A duct filter (9) is installed at one end of the adjustable air vent (8). The main body (1) is equipped with a first variable frequency fan (101) on the inside, a first heat exchanger (111) is installed on one side of the first variable frequency fan (101), a first drive shaft (121) is installed on one side of the first heat exchanger (111), a first duct fan (131) is installed on one side of the first drive shaft (121), and a first wind speed sensor (141) is installed on the top of the first duct fan (131). The second variable frequency fan (102) is installed inside the main body (1). A second heat exchanger (112) is installed on one side of the second variable frequency fan (102). A second drive shaft (122) is installed on one side of the second heat exchanger (112). A second duct fan (132) is installed on one side of the second drive shaft (122). A second wind speed sensor (142) is installed at the top of the second duct fan (132).

2. The ventilation equipment for a paper machine with a multi-channel design according to claim 1, characterized in that: The regulating valve (7) is fixedly connected to the inner wall of the main body (1) by a snap-fit ​​method. The connecting hole diameter of the regulating valve (7) is 12mm. The inner side of the valve is connected to the adjustable air outlet (8) by a threaded engagement method. The adjustable air outlet (8) is made of stainless steel and its engagement angle range is 0°-90°.

3. The ventilation equipment for a paper machine with a multi-channel design according to claim 1, characterized in that: The first heat exchanger (111) and the first variable frequency fan (101) are connected by an integrated fastening bolt with a diameter of 8mm. The first heat exchanger (111) is movably connected to the first drive shaft (121) through a hinge structure with a pin diameter of 6mm and a movable rotation angle of 15°.

4. A paper machine ventilation device with a multi-channel design according to claim 1, characterized in that: The first duct fan (131) is mounted on the first drive shaft (121) by an embedded bearing. The inner diameter of the embedded bearing is 10mm and the outer diameter is 20mm. The fan blades of the first duct fan (131) are designed with a 45° tilt and there are 6 blades, which are evenly distributed on the circumference.

5. A paper machine ventilation device with a multi-channel design according to claim 1, characterized in that: The first wind speed sensor (141) is fixed to the top of the first air duct fan (131) by a grooved slide rail. The slide rail is made of polytetrafluoroethylene material and has a sliding gap of 0.2 mm. The first wind speed sensor (141) and the PLC controller (6) are electrically connected by a shielded wire.

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