An inkjet ink filtration system with degassing effect

Abstract

The utility model discloses a kind of inkjet ink filtering systems with degassing effect, including first normal-pressure container, for storing the ink to be filtered;First automatic pressure regulating delivery assembly, for the positive pressure input of ink to filter component;Filtering component, for filtering ink;Second automatic pressure regulating delivery assembly, for making ink pass through negative pressure output filter component;Second normal-pressure container, for storing ink.The utility model two groups of automatic pressure regulating delivery assembly jointly provide inkjet ink filtering power, first automatic pressure regulating delivery assembly makes ink pass through positive pressure input filter component, second automatic pressure regulating delivery assembly makes ink pass through negative pressure output filter component, since ink is passed through negative pressure output filter component, after the process similar to negative pressure suction filtration, therefore, the inkjet ink filtering system can filter out dissolved oxygen and other gases in ink smoothly, can effectively improve the quality of ink, and without configuring negative pressure tank, degassing component etc., production efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of digital inkjet technology, and in particular to an inkjet ink filtration system with degassing effect. Background Technology

[0002] Currently, the most common filtration methods for inkjet inks are positive pressure filtration and negative pressure filtration.

[0003] 1. Positive pressure filtration offers strong production continuity and simple operation, but dissolved oxygen and some other gases may remain in the filtered ink.

[0004] 2. Negative pressure filtration has a degassing effect, resulting in extremely low gas content in the filtered ink. However, it requires a pressure tank and has poor production continuity.

[0005] Regarding inkjet ink degassing, vacuum degassing using negative pressure tanks or adding degassing components to the filtration system are commonly used. However, degassing components are relatively expensive, and when used with oil-based or UV inkjet inks, their corrosion resistance and service life must be considered. Furthermore, the material flow rate of degassing components needs to be strictly controlled, which can affect production efficiency. Utility Model Content

[0006] The purpose of this application is to provide an inkjet ink filtration system with degassing effect to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this application provides the following technical solution: an inkjet ink filtration system with degassing effect, comprising a first atmospheric pressure container for storing ink to be filtered;

[0008] The first automatic pressure regulating delivery assembly is used to input ink into the filter assembly under positive pressure;

[0009] A filter assembly used to filter ink;

[0010] The second automatic pressure regulating delivery assembly is used to allow ink to pass through the negative pressure output filter assembly;

[0011] The second atmospheric pressure container is used to store the filtered ink.

[0012] Preferably, the first automatic pressure regulating delivery component and the second automatic pressure regulating delivery component have the same structure and both include a pressure buffer tank, a signal control component, a pneumatic diaphragm pump and a solenoid valve. The output end of the pneumatic diaphragm pump is connected to the input end of the pressure buffer tank. The solenoid valve is located at the outlet of the pressure buffer tank. The signal control component is electrically connected to the solenoid valve and a pressure sensor located inside the pressure buffer tank to measure the pressure.

[0013] Preferably, the first atmospheric pressure vessel is connected to the input end of the pneumatic diaphragm pump of the first automatic pressure regulating and conveying assembly via a pipeline; the output end of the buffer tank of the first automatic pressure regulating and conveying assembly is connected to the input end of the filter assembly; the output end of the filter assembly is connected to the input end of the pneumatic diaphragm pump of the second automatic pressure regulating and conveying assembly; and the output end of the buffer tank of the second automatic pressure regulating and conveying assembly is connected to the second atmospheric pressure vessel.

[0014] Preferably, the filter assembly consists of multiple filter elements connected in series.

[0015] Preferably, the first automatic pressure regulating conveying component is set to a certain positive pressure range so that ink can be input into the filter component through positive pressure, and the second automatic pressure regulating conveying component is set to a certain negative pressure range so that ink can be output from the filter component through negative pressure.

[0016] In summary, the technical effects and advantages of this utility model are as follows:

[0017] This invention features two sets of automatic pressure regulating conveying components that jointly provide power for inkjet ink filtration. The first automatic pressure regulating conveying component allows ink to enter the filtration component under positive pressure, while the second automatic pressure regulating conveying component allows ink to exit the filtration component under negative pressure. Since the ink exits the filtration component under negative pressure, undergoing a process similar to negative pressure filtration, this inkjet ink filtration system can successfully filter out dissolved oxygen and other gases from the ink, effectively improving ink quality. Furthermore, it eliminates the need for negative pressure tanks, degassing components, etc., and achieves filtration from an atmospheric pressure container to an atmospheric pressure container, resulting in lower production costs and higher production efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an inkjet ink filtration system with degassing effect according to an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the internal structure of the first automatic pressure regulating delivery component of an inkjet ink filtration system with degassing effect according to an embodiment of this application.

[0021] In the figure: 1. First atmospheric pressure vessel; 2. First automatic pressure regulating and conveying assembly; 3. Filter assembly; 4. Second automatic pressure regulating and conveying assembly; 5. Second atmospheric pressure vessel; 6. Pressure buffer tank; 7. Signal control assembly; 8. Pneumatic diaphragm pump; 9. Solenoid valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] It should also be noted that all standard parts used in this application are commercially available, and can be custom-made according to the description and drawings. Unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances, and unless explicitly limited, machinery, parts, and equipment can all adopt conventional models in the prior art.

[0025] In this document, the term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Example:

[0027] Detailed descriptions and installation instructions for each component

[0028] First Atmospheric Pressure Vessel 1

[0029] The first atmospheric pressure container 1 is made of corrosion-resistant plastic and has a capacity of 50 liters. It is used to store ink to be filtered. A sealable filling port is located at the top of the container for easy ink addition; a discharge port is located at the bottom, connected via a pipe to the input end of the pneumatic diaphragm pump 8 of the first automatic pressure regulating and conveying assembly 2. During installation, the first atmospheric pressure container 1 is placed on a stable support, ensuring it is horizontal to prevent ink leakage.

[0030] 2. First Automatic Pressure Regulating Conveying Component 2

[0031] Pressure buffer tank 6: The pressure buffer tank 6 is made of stainless steel and has a volume of 10 liters. Its inlet is connected to the outlet of the pneumatic diaphragm pump 8 via a pipe, and its outlet is connected to the inlet of the filter assembly 3 via a pipe. A safety valve is installed on the top of the pressure buffer tank 6 to prevent excessive pressure inside the tank; a pressure sensor is also installed on the tank body to monitor the pressure inside the tank in real time.

[0032] Signal control component 7: Signal control component 7 uses a programmable logic controller (PLC), which is electrically connected to solenoid valve 9 and pressure sensor. Signal control component 7 is preset to a positive pressure range of 0.2 - 0.5 MPa. When the pressure sensor detects that the pressure in the pressure buffer tank 6 is below 0.2 MPa, signal control component 7 controls solenoid valve 9 to open and simultaneously starts pneumatic diaphragm pump 8, allowing ink to enter filter component 3 under positive pressure. When the pressure is above 0.5 MPa, signal control component 7 controls solenoid valve 9 to close and simultaneously stops pneumatic diaphragm pump 8.

[0033] Pneumatic diaphragm pump 8: The pneumatic diaphragm pump 8 is a double-acting pneumatic diaphragm pump with a flow rate of 10 liters / minute and a maximum working pressure of 0.8 MPa. The input end of the pneumatic diaphragm pump 8 is connected to the discharge port of the first atmospheric pressure vessel 1 through a pipeline, and the output end is connected to the input end of the pressure buffer tank 6 through a pipeline.

[0034] Solenoid valve 9: Solenoid valve 9 is a normally closed solenoid valve, installed at the outlet of pressure buffer tank 6. The opening and closing of solenoid valve 9 is controlled by signal control component 7, used to regulate ink flow and pressure.

[0035] Three-filter assembly 3

[0036] The filter assembly 3 consists of three filter elements connected in series: a coarse filter element, a medium filter element, and a fine filter element. The coarse filter element has a filtration precision of 10 μm and is used to filter larger particulate impurities; the medium filter element has a filtration precision of 1 μm and is used to filter smaller particulate impurities; the fine filter element has a filtration precision of 0.1 μm and is used to filter tiny particulate impurities and air bubbles. Each filter element is installed in an independent filter element housing for easy replacement and cleaning. The input end of the filter assembly 3 is connected to the output end of the pressure buffer tank 6 of the first automatic pressure regulating and conveying assembly 2 via a pipeline, and the output end is connected to the input end of the pneumatic diaphragm pump 8 of the second automatic pressure regulating and conveying assembly 4 via a pipeline.

[0037] 4. Second Automatic Pressure Regulating Conveying Component

[0038] The structure of the second automatic pressure regulating conveying assembly 4 is the same as that of the first automatic pressure regulating conveying assembly 2. The pressure buffer tank 6, signal control assembly 7, pneumatic diaphragm pump 8, and solenoid valve 9 also have the same model and parameters. The difference is that the signal control assembly 7 is preset to a negative pressure range of -0.1 to -0.3 MPa. When the pressure sensor detects that the pressure inside the pressure buffer tank 6 is higher than -0.1 MPa, the signal control assembly 7 controls the solenoid valve 9 to open and simultaneously starts the pneumatic diaphragm pump 8, allowing ink to be output from the filter assembly 3 through negative pressure; when the pressure is lower than -0.3 MPa, the signal control assembly 7 controls the solenoid valve 9 to close and simultaneously stops the pneumatic diaphragm pump 8.

[0039] 5. Second Atmospheric Pressure Vessel 5

[0040] The second atmospheric pressure container 5 is made of the same material and has the same structure as the first atmospheric pressure container 1, with a capacity of 50 liters. Its input end is connected to the output end of the pressure buffer tank 6 of the second automatic pressure regulating and conveying assembly 4 via a pipe, and is used to store the filtered ink. An exhaust port is provided at the top of the container to discharge the gas inside; and a discharge port is provided at the bottom to discharge the filtered ink.

[0041] System working process

[0042] One ink input

[0043] First, open the feed port of the first atmospheric pressure container 1 and add the ink to be filtered into the container. Then, start the signal control component 7 of the first automatic pressure regulating and conveying assembly 2. When the pressure sensor detects that the pressure in the pressure buffer tank 6 is lower than 0.2 MPa, the signal control component 7 controls the solenoid valve 9 to open and simultaneously starts the pneumatic diaphragm pump 8. The pneumatic diaphragm pump 8 draws in the ink from the first atmospheric pressure container 1 and delivers it to the pressure buffer tank 6 under positive pressure. The pressure buffer tank 6 serves to stabilize the pressure and buffer the flow rate, ensuring that the ink is input into the filter assembly 3 at a stable positive pressure.

[0044] Two ink filters

[0045] After entering filter assembly 3, the ink passes sequentially through the coarse filter element, the medium filter element, and the fine filter element. During the filtration process, larger particulate impurities are intercepted by the coarse filter element, smaller particulate impurities are intercepted by the medium filter element, and tiny particulate impurities and air bubbles are intercepted by the fine filter element. Simultaneously, due to the pressure difference within filter assembly 3, the ink undergoes a degassing effect during filtration, separating the gases from the ink.

[0046] Three ink outputs

[0047] The filtered ink enters the input terminal of the pneumatic diaphragm pump 8 of the second automatic pressure regulating delivery assembly 4. When the pressure sensor of the second automatic pressure regulating delivery assembly 4 detects that the pressure in the pressure buffer tank 6 is higher than -0.1 MPa, the signal control assembly 7 controls the solenoid valve 9 to open, and simultaneously starts the pneumatic diaphragm pump 8. The pneumatic diaphragm pump 8 draws the filtered ink out from the filter assembly 3 under negative pressure and delivers it to the pressure buffer tank 6. The pressure buffer tank 6 again plays a role in stabilizing the pressure and buffering the flow rate, so that the ink is output to the second atmospheric pressure container 5 under a stable negative pressure.

[0048] Four-stage collection and filtration of ink

[0049] The filtered ink is ultimately stored in the second atmospheric pressure container 5 and can be discharged through the bottom outlet for inkjet printing.

[0050] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An inkjet ink filtration system with degassing effect, characterized in that: include: The first atmospheric pressure container (1) is used to store the ink to be filtered; The first automatic pressure regulating delivery assembly (2) is used to input ink into the filter assembly under positive pressure; Filter assembly (3) is used to filter ink; The second automatic pressure regulating delivery assembly (4) is used to allow ink to pass through the negative pressure output filter assembly; The second atmospheric pressure container (5) is used to store the filtered ink; The first automatic pressure regulating delivery assembly (2) and the second automatic pressure regulating delivery assembly (4) have the same structure and both include a pressure buffer tank (6), a signal control assembly (7), a pneumatic diaphragm pump (8) and a solenoid valve (9). The output end of the pneumatic diaphragm pump (8) is connected to the input end of the pressure buffer tank (6). The solenoid valve (9) is located at the outlet of the pressure buffer tank (6). The signal control assembly (7) is electrically connected to the solenoid valve (9) and a pressure sensor located inside the pressure buffer tank (6) to measure the pressure.

2. The inkjet ink filtration system with degassing effect according to claim 1, characterized in that: The first atmospheric pressure vessel (1) is connected to the input end of the pneumatic diaphragm pump (8) of the first automatic pressure regulating and conveying assembly (2) through a pipeline. The output end of the pressure buffer tank (6) of the first automatic pressure regulating and conveying assembly (2) is connected to the input end of the filter assembly (3). The output end of the filter assembly (3) is connected to the input end of the pneumatic diaphragm pump (8) of the second automatic pressure regulating and conveying assembly (4). The output end of the pressure buffer tank (6) of the second automatic pressure regulating and conveying assembly (4) is connected to the second atmospheric pressure vessel (5).

3. The inkjet ink filtration system with degassing effect according to claim 1, characterized in that: The filter assembly (3) is composed of multiple filter elements connected in series.

4. The inkjet ink filtration system with degassing effect according to claim 1, characterized in that: The first automatic pressure regulating delivery component (2) is set to a certain positive pressure range so that ink can be input into the filter component (3) through positive pressure. The second automatic pressure regulating delivery component (4) is set to a certain negative pressure range so that ink can be output from the filter component (3) through negative pressure.

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