A paperboard printing production line negative pressure dust collection system

Abstract

The application relates to the technical field of paperboard printing processing equipment, and discloses a paperboard printing production line negative pressure dust collection system, which comprises a negative pressure generation module, a dust collection pipeline module, a collection and separation module and a control module. The negative pressure generation module generates negative pressure suction force, the dust collection pipeline module sucks in waste generated by the printing production line and transmits the waste to the collection and separation module, the collection and separation module classifies and filters the sucked waste and delivers the waste to a waste collection bin, the anti-blocking unit automatically cleans when filtering is blocked, the control module is electrically connected with other modules, the opening degree of control valves on each branch dust collection pipe in the dust collection pipeline module and the operating power of the negative pressure generation module are adjusted according to the operating state of the production line, dynamic adjustment of suction force is realized, and the anti-blocking unit is automatically cleaned when blocking occurs according to the negative pressure parameters in the dust collection pipeline module.

Description

Technical Field

[0001] This invention relates to the field of paperboard printing and processing equipment technology, specifically to a negative pressure dust extraction system for a paperboard printing production line. Background Technology

[0002] A cardboard printing production line typically includes multiple continuous workstations such as cutting, slotting, die-cutting, and printing. During cardboard processing, a large amount of solid waste, including paper scraps and fine dust, is generated due to cutting tools, mechanical friction, and the shedding of the cardboard fibers. If this waste is not collected in a timely and effective manner, it will, on the one hand, remain suspended in the workshop air, causing dust pollution, endangering the health of operators, and posing a serious safety hazard of dust explosion at high dust concentrations; on the other hand, the waste easily adheres to the surface of the cardboard, mixing with ink during the printing process, leading to quality defects such as spots, dirty printing, and ink smearing, severely reducing the product qualification rate. In addition, waste accumulation in equipment gaps or on transmission components will accelerate equipment wear, increase failure rates, and increase maintenance costs.

[0003] Currently, waste removal in the paperboard printing production line mainly relies on manual periodic sweeping or the installation of localized fixed vacuum systems. Manual sweeping cannot achieve continuous operation, is time-consuming and labor-intensive, and easily generates secondary dust, resulting in incomplete cleaning. Localized fixed vacuum systems typically have suction ports at only a single workstation, leading to an unreasonable layout that fails to cover multiple waste-generating workstations. Furthermore, these systems lack tiered filtration, resulting in the collection of mixed paper scraps and dust. Large particles easily clog the filter components, causing a rapid decline in negative pressure suction and poor actual dust removal. Frequent manual cleaning of the filters is necessary, severely impacting the continuous operation efficiency of the production line. In particular, existing vacuum systems lack automatic anti-clogging functions. Once the filter becomes clogged, manual cleaning is required, preventing automatic detection and online cleaning, further increasing the time and frequency of production interruptions. In addition, most existing vacuum systems operate at constant power, failing to dynamically adjust suction based on the actual start / stop status of each workstation, resulting in significant energy waste. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a negative pressure dust collection system for a cardboard printing production line. This system generates negative pressure suction through a negative pressure generation module, which filters and grades the sucked-in waste material before transporting it to a waste collection bin. Simultaneously, it automatically cleans the blocked areas when the filter becomes clogged. Furthermore, it dynamically adjusts the suction power based on the actual start / stop status of each workstation on the production line, reducing electricity costs and solving the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a negative pressure dust collection system for a cardboard printing production line includes a negative pressure generating module, a dust collection pipeline module, a collection and separation module, and a control module; The negative pressure generating module is used to generate negative pressure suction. The dust collection pipeline module includes a main dust collection pipe and branch dust collection pipes. The branch dust collection pipes are laid along the workstations of the production line, and their dust collection ports are adjacent to the surface of the cardboard. They are used to suck waste materials into the interior. The branch dust collection pipes are equipped with control valves. The main dust collection pipe is used to transport the sucked-in waste materials to the collection and separation module. The collection and separation module includes a graded filtration unit and an anti-clogging unit. The graded filtration unit is used to separate waste materials of different particle sizes and transport them to the waste collection bin. The anti-clogging unit is used to automatically clean the filter when it becomes clogged. The control module includes a valve control unit, a negative pressure regulation unit, and a blockage monitoring unit. The valve control unit is electrically connected to the control valves and is used to adjust the opening degree of the control valves on each branch dust collection pipe according to the operating status of the production line. The negative pressure regulation unit is electrically connected to the negative pressure generating module and is used to adjust the operating power of the negative pressure generating module according to the operating status of the production line. The blockage monitoring unit is electrically connected to the anti-blockage unit and is used to monitor the negative pressure parameters in the dust collection pipe module, determine whether the graded filtration unit is blocked, and control the anti-blockage unit to clean the graded filtration unit.

[0006] As a preferred technical solution of the present invention, the negative pressure generating module is used to generate negative pressure suction. Specifically, the negative pressure generating module is used to receive the operating power output by the negative pressure regulating unit, and adjust its own operating power according to the operating power. By driving the internal impeller to rotate, the rotation speed is changed, thereby generating negative pressure suction.

[0007] As a preferred technical solution of the present invention, the graded filtration unit is used to separate waste materials of different particle sizes and transport them to the waste collection bin. Specifically, the graded filtration unit is provided with multiple filtration layers in sequence along the airflow direction, including a primary filtration layer and a secondary filtration layer. When the waste material enters the collection and separation module, it is first intercepted by the primary filtration layer. The waste material intercepted by this layer falls into the first waste collection bin. The waste material that is not intercepted by the primary filtration layer is intercepted by the secondary filtration layer. The waste material intercepted by this layer falls into the second waste collection bin. The waste material in the first waste collection bin and the second waste collection bin is transported to the waste collection bin.

[0008] As a preferred technical solution of the present invention, the anti-clogging unit is used to automatically clean the filter when it is clogged. Specifically, the anti-clogging unit applies mechanical impact to the graded filter unit to cause the waste material attached to it to fall off.

[0009] As a preferred embodiment of the present invention, the valve control unit is electrically connected to the control valve. This unit is used to adjust the opening degree of the control valve on each branch dust extraction pipe according to the operating status of the production line. Specifically, when a certain station in the production line is paused, the valve control unit sets the opening degree of the control valve at that station to... ,in, Indicates the first The opening degree of the control valve corresponding to each workstation. This indicates the minimum opening degree of the control valve. When a workstation in the production line is operating normally, the default opening degree of the control valve corresponding to each workstation is set to [value missing]. ,in, This indicates the standard opening degree of the control valve.

[0010] As a preferred embodiment of the present invention, the negative pressure control unit is electrically connected to the negative pressure generating module. This unit is used to adjust the operating power of the negative pressure generating module according to the operating status of the production line. Specifically, when a workstation in the production line is paused, the negative pressure control unit adjusts the operating power of the negative pressure generating module, as shown in the following expression: in, This indicates the adjusted operating power of the negative pressure generating module; This indicates the rated power of the negative pressure generating module; Indicates the total number of branch suction pipes; Indicates the first The opening degree of the control valve corresponding to each workstation; This represents the sum of the opening degrees of all valves.

[0011] As a preferred embodiment of the present invention, the blockage monitoring unit is electrically connected to the anti-blockage unit. This unit is used to monitor the negative pressure parameters in the vacuum pipe module, determine whether the graded filtration unit is blocked, and control the anti-blockage unit to clean the graded filtration unit, including the following steps: Step A1: When the blockage determination condition is met, it is determined that the hierarchical filtration unit is blocked. At this time, the blockage monitoring unit sends a blockage signal to the anti-blockage unit. Step A2: After receiving a blockage signal, the blockage monitoring unit controls the anti-blockage unit to clean the tiered filtration unit. The relevant expression is as follows: in, Indicates the tapping frequency of the anti-blocking unit; Indicates the adjustment coefficient; Indicates time The rate of decrease in negative pressure; Step A3: Continue cleaning until the negative pressure meets the normal operating conditions.

[0012] As a preferred embodiment of the present invention, the expression for the blockage determination condition in step A1 is as follows: in, Indicates time The rate of decrease in negative pressure; The threshold for the rate of negative pressure decrease used to determine blockage; Indicates the rate of decrease in negative pressure Above the threshold The duration; This represents the duration threshold for determining congestion.

[0013] As a preferred technical solution of the present invention, the time negative pressure drop rate The expression is as follows: in, This indicates the standard negative pressure value within the vacuum suction pipe module; Indicates time The measured negative pressure value.

[0014] As a preferred embodiment of the present invention, the expression for the normal operating conditions of step A3 is: ,in, Indicates time The measured negative pressure value This indicates the standard negative pressure value within the vacuum suction pipe module. This represents the adjustment coefficient.

[0015] Compared with the prior art, the present invention provides a negative pressure dust collection system for a cardboard printing production line, which has the following beneficial effects: This invention generates negative pressure suction through a negative pressure generating module, sucks in waste materials generated from the printing production line through a dust suction pipeline module, and transmits them to a collection and separation module. The collection and separation module performs graded filtration on the sucked-in waste materials and delivers them to a waste collection bin. An anti-clogging unit automatically cleans the filter when it becomes clogged. The control module is electrically connected to other modules and adjusts the opening degree of the control valves on each branch dust suction pipe in the dust suction pipeline module and the operating power of the negative pressure generating module according to the operating status of the production line, thereby realizing dynamic adjustment of the suction power. The anti-clogging unit is controlled to automatically clean when a blockage occurs based on the negative pressure parameters in the dust suction pipeline module. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the process of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1 A negative pressure dust collection system for a cardboard printing production line includes: a negative pressure generating module, a dust collection pipeline module, a collection and separation module, and a control module; The negative pressure generating module is used to generate negative pressure suction. Specifically, the negative pressure generating module receives the operating power output by the negative pressure regulating unit and adjusts its own operating power according to the operating power. It drives the internal impeller to rotate to change the speed, thereby generating negative pressure suction. The dust collection pipeline module includes a main dust collection pipe and branch dust collection pipes. The branch dust collection pipes are laid along the workstations of the production line, and their dust collection ports are adjacent to the surface of the cardboard to suck up the waste material. The branch dust collection pipes are equipped with control valves. The main dust collection pipe is used to transport the sucked-up waste material to the collection and separation module. The collection and separation module includes a graded filtration unit and an anti-clogging unit. The graded filtration unit is used to separate waste materials of different particle sizes and transport them to the waste collection bin. The anti-clogging unit is used to automatically clean the filter when it becomes clogged. The graded filtration unit is equipped with multiple filtration layers along the airflow direction, including a primary filtration layer and a secondary filtration layer. When waste enters the collection and separation module, it is first intercepted by the primary filtration layer, and the waste intercepted by this layer falls into the first waste collection bin. The waste that is not intercepted by the primary filtration layer is intercepted by the secondary filtration layer, and the waste intercepted by this layer falls into the second waste collection bin. The waste in the first waste collection bin and the second waste collection bin is transported to the waste collection bin. The anti-clogging unit applies mechanical impact to the graded filtration unit to cause the waste attached to it to fall off. The control module includes a valve control unit, a negative pressure regulation unit, and a blockage monitoring unit. The valve control unit is electrically connected to the control valves and is used to adjust the opening degree of the control valves on each branch dust collection pipe according to the operating status of the production line. The negative pressure regulation unit is electrically connected to the negative pressure generating module and is used to adjust the operating power of the negative pressure generating module according to the operating status of the production line. The blockage monitoring unit is electrically connected to the anti-blockage unit and is used to monitor the negative pressure parameters in the dust collection pipe module, determine whether the graded filtration unit is blocked, and control the anti-blockage unit to clean the graded filtration unit. The valve control unit is electrically connected to the control valve. This unit is used to adjust the opening degree of the control valve on each branch dust extraction pipe according to the operating status of the production line. Specifically, when a station in the production line is paused, the valve control unit sets the opening degree of the control valve at that station to... ,in, Indicates the first The opening degree of the control valve corresponding to each workstation. This indicates the minimum opening degree of the control valve. When a workstation in the production line is operating normally, the default opening degree of the control valve corresponding to each workstation is set to [value missing]. ,in, Indicates the standard opening degree of the control valve; When a workstation is suspended due to reasons such as version change, debugging, or malfunction, the valve control unit automatically reduces the valve opening of that workstation to the minimum opening. Instead of completely closing the valve, the valve is closed. This is done to: significantly reduce ineffective pumping at the paused workstation and lower energy consumption; and avoid the adverse effects of a sharp increase in negative pressure in the pipeline caused by the valve being completely closed. The negative pressure control unit is electrically connected to the negative pressure generating module. This unit is used to adjust the operating power of the negative pressure generating module according to the operating status of the production line. Specifically, when a station in the production line is paused, the negative pressure control unit adjusts the operating power of the negative pressure generating module. The relevant expression is as follows: in, This indicates the adjusted operating power of the negative pressure generating module; This indicates the rated power of the negative pressure generating module; Indicates the total number of branch suction pipes; Indicates the first The opening degree of the control valve corresponding to each workstation; This represents the sum of the opening degrees of all valves; The operating power required by the negative pressure generating module is proportional to the average opening degree of the control valves at each station. When some stations in the production line are paused, the valve control unit will reduce the valve opening at the corresponding station to the minimum opening degree. At this point, the arithmetic mean of the opening degrees of all valves As the pressure decreases, the operating power of the negative pressure generating module also decreases, which avoids running at rated power when some workstations are shut down, thus avoiding a large waste of electrical energy. At the same time, the linear proportional regulation method is simple and reliable, requiring no complex iterative calculations, and can quickly respond to changes in valve opening. The clogging monitoring unit is electrically connected to the anti-clogging unit. This unit monitors the negative pressure parameters within the suction pipe module, determines whether the tiered filtration unit is clogged, and controls the anti-clogging unit to clean the tiered filtration unit, including the following steps: Step A1: When the blockage determination condition is met, it is determined that the hierarchical filtration unit is blocked. At this time, the blockage monitoring unit sends a blockage signal to the anti-blockage unit. The expression for the blockage determination condition is as follows: in, Indicates time The rate of decrease in negative pressure; The threshold for the rate of negative pressure decrease used to determine blockage; Indicates the rate of decrease in negative pressure Above the threshold The duration; This indicates the duration threshold for congestion determination, at time... negative pressure drop rate The expression is as follows: in, This indicates the standard negative pressure value within the vacuum suction pipe module; Indicates time The measured negative pressure value is determined by a negative pressure sensor within the vacuum duct module. As waste gradually accumulates on the surface of the tiered filtration unit, the resistance to airflow increases, leading to an increase in the measured negative pressure value. relative to standard negative pressure value A decrease occurred, negative pressure decrease rate This value reflects the degree of decay of the current negative pressure; the larger the value, the more severe the blockage. The rate of decrease in negative pressure alone exceeds a certain threshold. This is not sufficient to reliably determine a blockage, as production line start-ups and shutdowns, changes in cardboard specifications, etc., can also cause temporary negative pressure fluctuations. Therefore, the blockage monitoring unit introduces a duration condition: only when the negative pressure drop rate... Continuously above the threshold Time Exceeding the set duration threshold Only when the time is right is it determined to be a true blockage. This dual condition effectively filters out instantaneous interference signals and avoids the anti-blocking unit from frequently starting or acting ineffectively due to misjudgment. The blockage monitoring unit continuously calculates the negative pressure drop rate and compares it with a threshold, while simultaneously monitoring the duration of the over-threshold state, thus achieving accurate and reliable identification of the blockage state of the tiered filtration unit. Step A2: After receiving a blockage signal, the blockage monitoring unit controls the anti-blockage unit to clean the tiered filtration unit. The relevant expression is as follows: in, Indicates the tapping frequency of the anti-blocking unit; Indicates the adjustment coefficient; Indicates time The rate of decrease in negative pressure; when the blockage is minor ( Slightly above the threshold), the anti-clogging unit gently taps at a low frequency, which removes the attached waste while avoiding excessive impact on the filter; when the clogging is severe ( (Larger), the anti-clogging unit automatically increases the tapping frequency to quickly clear the filter unit with a stronger cleaning action, so that the negative pressure can be quickly restored to normal; Step A3: The cleaning process continues until the negative pressure meets the normal operating conditions, expressed as: ,in, Indicates time The measured negative pressure value This indicates the standard negative pressure value within the vacuum suction pipe module. This represents the adjustment coefficient, when the measured negative pressure... Restore to standard negative pressure A certain proportion (i.e.) When the filter unit is clogged to the above level, it indicates that the clogging has been effectively relieved and the suction power has basically returned to an acceptable level. At this point, the cleaning process can be stopped.

[0019] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure dust extraction system for a cardboard printing production line, characterized in that: It includes a negative pressure generating module, a dust suction pipe module, a collection and separation module, and a control module; The negative pressure generating module is used to generate negative pressure suction. The dust collection pipeline module includes a main dust collection pipe and branch dust collection pipes. The branch dust collection pipes are laid along the workstations of the production line, and their dust collection ports are adjacent to the surface of the cardboard. They are used to suck waste materials into the interior. The branch dust collection pipes are equipped with control valves. The main dust collection pipe is used to transport the sucked-in waste materials to the collection and separation module. The collection and separation module includes a graded filtration unit and an anti-clogging unit. The graded filtration unit is used to separate waste materials of different particle sizes and transport them to the waste collection bin. The anti-clogging unit is used to automatically clean the filter when it becomes clogged. The control module includes a valve control unit, a negative pressure regulation unit, and a blockage monitoring unit. The valve control unit is electrically connected to the control valves and is used to adjust the opening degree of the control valves on each branch dust collection pipe according to the operating status of the production line. The negative pressure regulation unit is electrically connected to the negative pressure generating module and is used to adjust the operating power of the negative pressure generating module according to the operating status of the production line. The blockage monitoring unit is electrically connected to the anti-blockage unit and is used to monitor the negative pressure parameters in the dust collection pipe module, determine whether the graded filtration unit is blocked, and control the anti-blockage unit to clean the graded filtration unit.

2. The negative pressure dust collection system for a cardboard printing production line according to claim 1, characterized in that: The negative pressure generating module is used to generate negative pressure suction. Specifically, the negative pressure generating module receives the operating power output by the negative pressure regulating unit and adjusts its own operating power according to the operating power. It drives the internal impeller to rotate to change the speed, thereby generating negative pressure suction.

3. The negative pressure dust extraction system for a cardboard printing production line according to claim 2, characterized in that: The graded filtration unit is used to separate waste materials of different particle sizes and transport them to the waste collection bin. Specifically, the graded filtration unit is arranged with multiple filtration layers in sequence along the airflow direction, including a primary filtration layer and a secondary filtration layer. When the waste enters the collection and separation module, it is first intercepted by the primary filtration layer. The waste intercepted by this layer falls into the first waste collection bin. The waste that is not intercepted by the primary filtration layer is intercepted by the secondary filtration layer. The waste intercepted by this layer falls into the second waste collection bin. The waste in the first waste collection bin and the second waste collection bin is transported to the waste collection bin.

4. The negative pressure dust extraction system for a cardboard printing production line according to claim 3, characterized in that: The anti-clogging unit is used to automatically clean the filter when it becomes clogged. Specifically, the anti-clogging unit applies mechanical impact to the graded filter unit to remove the waste material attached to it.

5. The negative pressure dust extraction system for a cardboard printing production line according to claim 4, characterized in that: The valve control unit is electrically connected to the control valve. This unit is used to adjust the opening degree of the control valve on each branch dust extraction pipe according to the operating status of the production line. Specifically, when a station in the production line is paused, the valve control unit sets the opening degree of the control valve at that station to... ,in, Indicates the first The opening degree of the control valve corresponding to each workstation. This indicates the minimum opening degree of the control valve. When a workstation in the production line is operating normally, the default opening degree of the control valve corresponding to each workstation is set to [value missing]. ,in, This indicates the standard opening degree of the control valve.

6. The negative pressure dust extraction system for a cardboard printing production line according to claim 5, characterized in that: The negative pressure control unit is electrically connected to the negative pressure generating module. This unit is used to adjust the operating power of the negative pressure generating module according to the operating status of the production line. Specifically, when a workstation in the production line is paused, the negative pressure control unit adjusts the operating power of the negative pressure generating module, as shown in the following expression: in, This indicates the adjusted operating power of the negative pressure generating module; This indicates the rated power of the negative pressure generating module; Indicates the total number of branch suction pipes; Indicates the first The opening degree of the control valve corresponding to each workstation; This represents the sum of the opening degrees of all valves.

7. The negative pressure dust extraction system for a cardboard printing production line according to claim 6, characterized in that: The blockage monitoring unit is electrically connected to the anti-blockage unit. This unit is used to monitor the negative pressure parameters in the vacuum suction pipe module, determine whether the graded filtration unit is blocked, and control the anti-blockage unit to clean the graded filtration unit, including the following steps: Step A1: When the blockage determination condition is met, it is determined that the hierarchical filtration unit is blocked. At this time, the blockage monitoring unit sends a blockage signal to the anti-blockage unit. Step A2: After receiving a blockage signal, the blockage monitoring unit controls the anti-blockage unit to clean the tiered filtration unit. The relevant expression is as follows: in, Indicates the tapping frequency of the anti-blocking unit; Indicates the adjustment coefficient; Indicates time The rate of decrease in negative pressure; Step A3: Continue cleaning until the negative pressure meets the normal operating conditions.

8. The negative pressure dust extraction system for a cardboard printing production line according to claim 7, characterized in that: The expression for the blockage determination condition in step A1 is as follows: in, Indicates time The rate of decrease in negative pressure; The threshold for the rate of negative pressure decrease used to determine blockage; Indicates the rate of decrease in negative pressure Above the threshold The duration; This represents the duration threshold for determining congestion.

9. The negative pressure dust extraction system for a cardboard printing production line according to claim 8, characterized in that: The time negative pressure drop rate The expression is as follows: in, This indicates the standard negative pressure value within the vacuum suction pipe module; Indicates time The measured negative pressure value.

10. The negative pressure dust extraction system for a cardboard printing production line according to claim 7, characterized in that: The expression for the normal operating condition in step A3 is: ,in, Indicates time The measured negative pressure value This indicates the standard negative pressure value within the vacuum suction pipe module. This represents the adjustment coefficient.

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