A wind speed balance type corrugated board dehumidifying fan

Abstract

The present application provides a kind of wind speed balance formula corrugated board dehumidification fan, high-speed negative pressure fan is used as the original power of air extraction, the air flow rate of each area is balanced by nine-square grid air suction port mode;And the air speed of air inlet air vortex of work surface is adjusted by variable speed air duct;And the extracted high humidity air is discharged to the outside of work area. In this way, under the condition that the ventilation volume of the entire corrugated board stacking operation coverage is equal, the humidity change of all corrugated boards can be balancedly reduced. Therefore, it can also ensure that corrugated board does not occur distortion phenomenon.

Description

Technical Field

[0001] This invention relates to the field of dehumidification equipment for cardboard, and specifically to a wind speed balanced type dehumidification fan for corrugated cardboard. Background Technology

[0002] The production process of corrugated cardboard inevitably results in high moisture content, especially during offset corrugating lamination, where the moisture content can easily exceed 20%. Therefore, dehumidification is unavoidable. Online dehumidification of corrugated cardboard typically involves using fans to dehumidify a stack of cardboard. The fan draws air from one side of the stack, allowing it to flow through the gaps in the corrugations and carry away the moisture. While this dehumidification process seems simple, the current industry-wide method of using dehumidifying fans presents serious quality problems for corrugated cardboard. First, all fans, regardless of size, are circular. However, cardboard stacks are typically square. Therefore, whether using a small fan matrix or a large fan, uneven moisture distribution within the stack is inevitable. This uneven moisture distribution inevitably leads to warping and deformation of the corrugated cardboard. Once warped, it becomes difficult to process in subsequent steps. Even if it is managed to be processed, the resulting product will certainly have numerous quality issues.

[0003] Currently, there are two main types of on-site dehumidification fans used in the industry: one uses large fans for direct extraction, and the other uses a matrix of small fans. Both methods present significant quality problems for the processed products. First, large fans cause the central circular area of ​​the cardboard stack to dry quickly, while the four corner areas show no change in humidity. Therefore, the cardboard is most prone to warping and deformation. While the matrix dehumidification method with small fans improves the effect somewhat, it still leaves diamond-shaped gaps between the circles of each fan. Although the area of ​​each zone is reduced, the number of gaps increases exponentially. This also causes more cardboard warping.

[0004] Therefore, the most pressing issue for the industry is how to maintain a complete and uniform balance of humidity in corrugated cardboard during the dehumidification process. Summary of the Invention

[0005] In view of this, the present invention provides a wind speed balanced corrugated cardboard dehumidifier, which can perform uniform and comprehensive dehumidification on cardboard stacks, so that the final cardboard drying is more uniform and will not be twisted or deformed due to inconsistent cardboard humidity.

[0006] To solve the above-mentioned technical problems, the present invention provides a wind speed balanced type dehumidifier for corrugated cardboard.

[0007] 1. The air source uses a powerful high-speed negative pressure fan for exhaust;

[0008] 2. Use a converter connector to change the round port of the fan to a square port;

[0009] 3. The air intake of the fan is evenly distributed by dividing the space into nine grids;

[0010] 4. Adjust the ventilation volume and airflow velocity of the negative pressure air inlet by changing the size of the nine-grid inlet of the fan;

[0011] 5. The wind speed and air volume of each unit in the nine-grid system of the negative pressure air inlet are adjusted and controlled by the variable speed fan.

[0012] 6. By controlling the air volume and flow rate of different areas of the negative pressure air inlet grid on the work surface, the air velocity difference between different areas of the work surface caused by the principle of air vortex is offset, thereby ensuring the wind speed balance of the entire work surface.

[0013] 7. The dehumidification effect of the entire corrugated cardboard stack is achieved by ensuring a uniform airflow velocity across all areas of the work surface.

[0014] The beneficial effects of the above-described technical solution of the present invention are as follows:

[0015] A complete airflow operation is adopted; the circular airflow is changed into a square airflow; the airflow control surface is divided by evenly distributed air intake windows; the airflow velocity of the entire operation surface is controlled and balanced by changing the vortex velocity of the local airflow; and the airflow velocity that needs to be balanced and adjusted is changed by changing the inlet and outlet area of ​​the air intake.

[0016] When the ventilation is uniform across the entire corrugated cardboard stacking operation area, the humidity variation of all corrugated cardboard can be reduced evenly. This ensures that the corrugated cardboard will not twist or deform. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the wind speed balanced corrugated cardboard dehumidifier of the present invention;

[0018] Figure 2 This is an exploded view of the suction structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the air intake of the fan in this invention;

[0020] Figure 4 This is a schematic diagram of the structure of the variable speed wind duct of the present invention;

[0021] Figure 5 This is a structural block diagram of the negative pressure air inlet of the present invention;

[0022] Figure 6 This is a structural diagram of a large wind turbine in the prior art (see prior art description for reference).

[0023] Figure 7 This is a structural diagram of a matrix wind turbine in the prior art (see prior art description for reference).

[0024] 01. Stack of cardboard to be dehumidified; 1. High-speed negative pressure fan; 2. Variable connector; 3. Variable speed fan duct; 3.1. Fan suction port; 3.2. Negative pressure air inlet; 4. Negative pressure air inlet; 5. Exhaust bend; 6. Exhaust outlet. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of the present invention. Figure 1-7 The technical solutions of the embodiments of the present invention will be clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0026] like Figure 1-7 As shown:

[0027] This embodiment provides a wind speed balanced corrugated cardboard dehumidifier, which uses a high-speed negative pressure fan 1 as the driving force for ventilation, and uses a nine-grid air intake to evenly balance the air velocity and flow rate in each area; and uses a variable speed fan 3 to adjust the wind speed of the air vortex at the air inlet of the working surface; and discharges the extracted high humidity air outside the working area.

[0028] The high-speed negative pressure fan 1 is a negative pressure fan with a large air volume and high pressure exhaust function, and its model is not strictly limited.

[0029] The fan air intake 3.1 is a nine-square grid air intake with equal area.

[0030] The fan intake 3.1 of the variable speed wind hopper 3 is a nine-square grid with equal dimensions, while the negative pressure air inlet 3.2 of the working surface is a nine-square grid with unequal areas and symmetrical sides.

[0031] The variable speed air duct 3 has nine independent ventilation ducts for its fan intake 3.1 and negative pressure air inlet 3.2.

[0032] In the 3.2 grid of the negative pressure air inlet, the center grid has the largest area, while the middle grids on the four sides have smaller areas than the center grid but larger areas than the corner grids.

[0033] The negative pressure air inlet 4 is installed correspondingly to the negative pressure air inlet 3.2, that is, the size of the nine-square grid opening of the negative pressure air inlet 3.2 is the same as that of the negative pressure air inlet 4.

[0034] The entire operating process of a dehumidifier is as follows:

[0035] 1. Place the cardboard stack 01 to be dehumidified in front of the dehumidifier and connect it with the negative pressure air inlet 4;

[0036] 2. Start the high-speed negative pressure fan 1;

[0037] 3. The circular airflow of the high-speed negative pressure fan 1 is changed into a square airflow through the adapter connector 2;

[0038] 4. The square airflow is evenly divided into nine airflow modules through the fan intake 3.1 of the variable speed wind duct 3;

[0039] 5. The nine equal airflow modules of the fan intake 3.1 extend forward through the variable speed air duct 3 and change their respective air intake areas.

[0040] 6. The variable speed wind duct's fan intake 3.1 The uniformly distributed suction speed and volume are changed by the nine-grid negative pressure air inlet 3.2 which varies with different air intake areas;

[0041] 7. Negative pressure air inlet 3.2 Based on the principle of air vortex, the middle air inlet is enlarged four times, and the middle grids on the four sides are also enlarged by 2 times, in order to counteract the changes in air vortex velocity and strive to achieve a balance between the air volume and velocity of the nine air inlets.

[0042] 8. When the ventilation volume is uniform across the entire working area of ​​the corrugated cardboard stack 01, the humidity variation of all corrugated cardboard can be reduced evenly. This ensures that the corrugated cardboard will not twist or deform.

[0043] 9. The high-speed negative pressure fan 1 draws in air with a certain humidity and guides it to the exhaust port 6 through the exhaust bend 5 connected to the back of the fan, and exhausts the humid air to the outside through the exhaust port 6.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A wind speed balanced type corrugated cardboard dehumidifier, characterized in that: A high-speed negative pressure fan (1) is used as the driving force for air extraction. The air velocity and flow rate of each area are evenly balanced by the nine-grid air intake. The speed of the air vortex at the air inlet of the working surface is adjusted by the variable speed air duct (3). The extracted high humidity air is discharged to the outside of the working area. The fan air intake (3.1) of the variable speed air duct (3) is an equal nine-grid, while the negative pressure air inlet (3.2) of the working surface is a nine-grid with symmetrical areas on all four sides.

2. The wind speed balanced corrugated cardboard dehumidifier as described in claim 1, characterized in that: The high-speed negative pressure fan (1) is a negative pressure fan with large air volume and high pressure exhaust function.

3. The wind speed balanced corrugated cardboard dehumidifier as described in claim 2, characterized in that: The fan air intake (3.1) is a nine-square grid air intake with equal area.

4. The wind speed balanced corrugated cardboard dehumidifier as described in claim 3, characterized in that: The fan intake (3.1) and negative pressure air inlet (3.2) of the variable speed fan duct (3) are nine independent ventilation ducts.

5. The wind speed balanced corrugated cardboard dehumidifier as described in claim 4, characterized in that: In the nine-square grid of the negative pressure air inlet (3.2), the center grid has the largest area, and the middle grids on the four sides have smaller areas than the center grid but larger areas than the corner grids.

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