Ink negative pressure filtration device

Abstract

The utility model provides an ink negative pressure filtering device, including finished product tank and with the negative pressure device who links to each other and provides the negative pressure for the inside of finished product tank, be provided with the filter assembly for filtering ink stock solution on the finished product tank, still include the feed pipe who links to each other with ink production equipment, the both ends of filter assembly are connected between feed pipe and finished product tank respectively through the detachable mode, be provided with the convex part and sealing cover on the finished product tank, be provided with the thread line on the outer diameter surface of convex part, the convex part is connected in the ink filtering, is connected with sealing cover after filtering is completed, the utility model has the advantages of: the design that feed pipe is directly connected with ink production equipment effectively avoids the secondary pollution problem of ink stock solution in the transmission process.

Description

Technical Field

[0001] This utility model relates to a filtration device, and more particularly to an ink negative pressure filtration device. Background Technology

[0002] In existing technologies, ink negative pressure filtration devices are widely used in printing, inkjet printing, and other industries to efficiently filter ink concentrates to remove impurities, ensuring ink purity and equipment operational stability. The process typically involves pouring the ink concentrate into a filter funnel. Under negative pressure, the ink undergoes solid-liquid separation through the filter assembly. The filtered ink is discharged through a guide pipe, while impurities are retained within the filter funnel. This device, with its negative pressure chamber and detachable filter assembly design, improves filtration efficiency and facilitates cleaning and maintenance, meeting the practical needs of industrial production.

[0003] Chinese patent document CN222033859U discloses an ink negative pressure filtration device, including a negative pressure vessel. A lid is rotatably mounted on the top of the vessel, and a transparent viewing window is provided on the surface of the lid. A guide tube is fixedly mounted on the top of the lid, and a detachable filter assembly is housed within the guide tube. A negative pressure component is located on one side of the negative pressure vessel. The filter assembly includes a detachable filter funnel installed within the guide tube, and a flow guide tube is provided at the bottom of the filter funnel.

[0004] However, existing technologies have significant drawbacks. For example, the filter funnel in the aforementioned patent is semi-open, allowing dust or impurities from the external environment to easily enter during the pouring of the ink concentrate, causing secondary contamination. Although the subsequent filter can provide some filtration, this contamination not only shortens its lifespan but may also result in impurities remaining in the filtered ink, affecting the final performance and product quality. Therefore, avoiding ink contamination before filtration is a pressing technical challenge that needs to be addressed. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides an ink negative pressure filtration device that can avoid secondary pollution caused by ink concentrate.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an ink negative pressure filtration device, comprising a finished product tank and a negative pressure device connected to the finished product tank and providing negative pressure inside the finished product tank. The finished product tank is provided with a filter assembly for filtering ink concentrate, and also includes a feed pipe connected to ink production equipment. The two ends of the filter assembly are detachably connected to the feed pipe and the finished product tank, respectively. The finished product tank is provided with a protrusion and a sealing cap. The outer diameter surface of the protrusion is provided with a thread. The protrusion is connected to the filter assembly during ink filtration and is connected to the sealing cap after filtration.

[0007] The beneficial effects of this invention are as follows: By detachably connecting the two ends of the filter assembly to the feed pipe and the finished product container respectively, the filter assembly can be easily replaced or cleaned, thereby improving the maintenance efficiency and service life of the equipment. Simultaneously, the protruding part design on the finished product container, combined with a threaded structure, not only ensures the sealing between the filter assembly and the finished product container during filtration but also allows for quick replacement of the sealing cap after filtration, facilitating subsequent transportation or filling of the finished product container. Furthermore, the design of directly connecting the feed pipe to the ink production equipment effectively avoids secondary contamination of the ink concentrate during transmission. As a preferred method, the connection between the feed pipe and the ink production equipment can adopt a quick-connect snap-fit ​​structure, further improving assembly and disassembly efficiency and ensuring the sealing performance at the connection point.

[0008] Furthermore, the filter assembly includes a filter tube and a connecting cap fixed on the filter tube. The inner diameter surface of the connecting cap is provided with a thread corresponding to the protrusion so that a seal is formed inside the finished product can after the connecting cap and the protrusion are engaged.

[0009] This technical solution, by setting threads on the inner diameter surface of the connecting cap corresponding to the protrusion, makes the connection between the filter assembly and the finished product tank tighter, effectively preventing leakage of ink concentrate during filtration and ensuring the stability of the filtration operation. Simultaneously, the threaded connection method offers high reliability and facilitates disassembly and reinstallation, helping to reduce equipment maintenance costs. As a preferred option, an elastic sealing ring can be added to the threads of the connecting cap to further improve the sealing effect, especially under high pressure or high temperature environments, significantly enhancing the applicability of the device. Another preferred option is to add a sealing ring at the center of the connecting cap where it connects to the filter tube, allowing the connecting cap to move on the filter tube while improving the sealing effect.

[0010] Furthermore, the filtration assembly includes a funnel containing a filter screen, one end of which is connected to a filter tube, and the other end is detachably connected to a feed tube.

[0011] This technical solution effectively intercepts impurities in the ink concentrate by incorporating a funnel with a filter screen within the filtration assembly, thereby improving filtration efficiency and the quality of the finished ink. The detachable connection between the funnel, filter tube, and feed tube allows users to replace filter screens of different specifications to meet varying filtration requirements. Furthermore, this modular design facilitates individual cleaning or replacement of the filtration assembly, reducing overall maintenance time. As a preferred approach, the funnel's filter screen can be designed as a multi-layered composite structure, with each layer having progressively smaller pore sizes, achieving graded filtration and further enhancing filtration precision.

[0012] Furthermore, the finished product tank is equipped with a liquid level observer, and the feed pipe is equipped with a shut-off component for cutting off the fluid flow channel between the feed pipe and the funnel. One end of the shut-off component extends out of the feed pipe and is rotated to close the fluid flow channel in the feed pipe.

[0013] This technical solution, by installing a liquid level indicator on the finished product container, enables real-time monitoring of ink level changes within the container. This allows operators to adjust production parameters promptly, preventing overflows or empty containers. Simultaneously, the stop-off design within the feed pipe allows for quick interruption of ink supply flow when changing the finished product container or pausing filtration, achieving container replacement without shutting down the machine and improving production efficiency. As a preferred option, the stop-off can be designed as a knob, allowing for easy manual opening or closing of the fluid channel. Furthermore, the knob surface features anti-slip textures to enhance ease of operation and safety.

[0014] Furthermore, the feed pipe includes an L-shaped cut-off section and an outlet section connected together, with the cut-off section connected to the ink production equipment and the outlet section connected to the filter assembly. The cut-off section has a tapered cut-off surface at the corner with the outlet section, and the shape of the end of the cut-off member facing the inside of the cut-off section is adapted to the cut-off surface.

[0015] This technical solution, by designing the feed pipe with an L-shaped structure and incorporating a tapered stop surface at the corner between the stop section and the discharge section, allows for a closer fit between the stop component and the stop surface. This completely blocks the flow of ink concentrate when closed, preventing leakage due to poor sealing. Furthermore, the L-shaped design optimizes the ink concentrate flow path, reduces fluid resistance, and improves filtration efficiency. As a preferred approach, a wear-resistant coating can be added to the contact area between the stop component and the stop surface to extend its service life. Additionally, a limiting device can be installed at the knob end of the stop component to prevent damage or seal failure due to excessive rotation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional view of the finished product tank and filter assembly according to an embodiment of the present utility model;

[0018] Figure 3 This is a cross-sectional view of the finished product can after filtration, according to an embodiment of this utility model.

[0019] Figure 4 This is a partial cross-sectional view of the feed pipe in an embodiment of the present invention. Detailed Implementation

[0020] This utility model embodiment provides an ink negative pressure filtration device, such as... Figure 1-4 As shown, this ink negative pressure filtration device mainly includes a finished product tank 1, a negative pressure device 2, a feed pipe 3, and a filter assembly 4. The finished product tank 1 stores the filtered ink and is equipped with a protrusion 11 and a sealing cap 12. The outer diameter surface of the protrusion 11 is designed with threads 111 for connection with the filter assembly 4 during filtration. After filtration, it can be used with the sealing cap 12 to ensure the sealing of the finished product tank 1. The negative pressure device 2 is connected to the finished product tank 1 via a pipe, providing a negative pressure environment inside the tank to promote the flow of the ink concentrate and the filtration process. One end of the feed pipe 3 is connected to the ink production equipment, and the other end is detachably connected to the filter assembly 4 to transport the ink concentrate.

[0021] The filter assembly 4 includes a filter tube 41, a connecting cap 42, and a funnel 43. The connecting cap 42 is fixed to one end of the filter tube 41, and its inner diameter surface has threads 421 corresponding to the protrusion 11. When the connecting cap 42 engages with the protrusion 11, it forms a seal within the finished product container 1, preventing ink leakage or the entry of outside air. The funnel 43 is located in the middle of the filter assembly 4, and contains a filter screen 431 for preliminary filtration of the ink concentrate. One end of the funnel 43 is connected to the filter tube 41, and the other end is detachably connected to the feed pipe 3, facilitating replacement of the filter screen 431 or cleaning of the funnel 43.

[0022] For ease of operation and monitoring, a liquid level observer 13 is installed on the finished product tank 1 to observe the ink level in the finished product tank 1 in real time. A stopper 31 is installed inside the feed pipe 3 to cut off the fluid flow channel between the feed pipe 3 and the funnel 43. One end of the stopper 31 extends outside the feed pipe 3, and the fluid flow channel inside the feed pipe 3 can be closed or opened by rotating this extended end. The feed pipe 3 consists of a stop section 32 and an outlet section 33, which form an L-shape when connected. The stop section 32 is connected to the ink production equipment, and the outlet section 33 is connected to the filter assembly 4. A tapered stop surface 321 is designed at the corner between the stop section 32 and the outlet section 33. The end of the stopper 31 facing inwards from the stop section 32 is fitted with the stop surface 321 to ensure complete closure of the fluid flow channel.

[0023] The working principle of this ink negative pressure filtration device is as follows: The ink concentrate flows from the ink production equipment through the feed pipe 3 into the funnel 43 of the filter assembly 4. After preliminary filtration by the filter screen 431, it enters the filter tube 41 and finally flows into the finished product tank 1. During this process, the negative pressure device 2 provides a negative pressure environment inside the finished product tank 1, facilitating the smooth passage of the ink concentrate through the filter assembly 4. After filtration is completed, the fluid flow channel in the feed pipe 3 can be closed by rotating the stop part 31. Then, the filter assembly 4 can be removed from the finished product tank 1 and replaced with the next finished product tank 1 to continue filtration, or the assembled filter assembly 4 and finished product tank 1 can be directly replaced, or the used filter assembly 4 can be disassembled and cleaned while replacing the finished product tank 1. Finally, the sealing cap 12 and the protrusion 11 are engaged to ensure the sealing of the finished product tank 1, completing the entire filtration process.

[0024] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. An ink negative pressure filtration device, comprising a finished product tank and a negative pressure device connected to the finished product tank and providing negative pressure inside the finished product tank, wherein the finished product tank is provided with a filter assembly for filtering ink concentrate, characterized in that: It also includes a feed pipe connected to the ink production equipment. The two ends of the filter assembly are detachably connected to the feed pipe and the finished product tank, respectively. The finished product tank is provided with a protrusion and a sealing cap. The outer diameter surface of the protrusion is provided with a thread. The protrusion is connected to the filter assembly during ink filtration and is connected to the sealing cap after filtration.

2. The ink negative pressure filtration device according to claim 1, characterized in that: The filter assembly includes a filter tube and a connecting cap fixed on the filter tube. The inner diameter surface of the connecting cap is provided with a thread corresponding to the protrusion so that the connecting cap and the protrusion can be fitted together to form a seal inside the finished product can.

3. The ink negative pressure filtration device according to claim 1, characterized in that: The filtration assembly includes a funnel containing a filter screen, one end of which is connected to a filter tube and the other end is detachably connected to a feed tube.

4. The ink negative pressure filtration device according to claim 3, characterized in that: The finished product tank is equipped with a liquid level observer, and the feed pipe is equipped with a shut-off component for cutting off the fluid flow channel between the feed pipe and the funnel. One end of the shut-off component extends out of the feed pipe and is rotated to close the fluid flow channel in the feed pipe.

5. The ink negative pressure filtration device according to claim 4, characterized in that: The feed pipe includes an L-shaped cut-off section and a discharge section connected together. The cut-off section is connected to the ink production equipment, and the discharge section is connected to the filter assembly. The cut-off section has a tapered cut-off surface at the corner where it meets the discharge section. The end of the cut-off component facing the inside of the cut-off section has an outer shape that matches the cut-off surface.

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