A filter with quick-change filter screen

Abstract

This utility model relates to the field of filter cartridge technology, and more particularly to a filter with a quick-replacement filter screen. It includes a filter cartridge frame and clamps. The filter cartridge frame includes a bottom tray, a support plate, and a flange seat. A frame support mesh is fixedly connected to the bottom tray. A central liquid extraction pipe is provided inside the frame support mesh. Both the central liquid extraction pipe and the frame support mesh are fixed to the support plate. The central liquid extraction pipe passes through the support plate and is fixed to the flange seat. A deployable filter screen is fitted over the frame support mesh, and a filter screen protective sleeve is fitted over the filter screen. The filter screen and filter screen protective sleeve are then fixed to the outside of the frame support mesh using clamps. This utility model provides a filter with a quick-replacement filter screen. By using clamps to detachably connect the filter screen and filter screen protective sleeve to the frame support mesh, it solves the problems of difficult filter screen replacement operations and filter screen damage caused by external forces in the prior art, thus ensuring the effectiveness of filtration and the replaceability of the filter screen protective sleeve.

Description

Technical Field

[0001] This utility model relates to the field of filter cartridge technology, specifically to a filter with a quick-replacement filter screen. Background Technology

[0002] The key to separating mixtures is the filter. Filters are not only the foundation for ensuring production safety and improving product quality, but also an important means of improving the living environment and maintaining health, and are used in all scenarios requiring purification or refinement, including industry, daily life, and scientific research. Currently used filters cause the filter screen to reciprocate under hydraulic pressure through suction and backwashing during the filtration process, eventually leading to fatigue and breakage. This results in the loss of slurry with the clarified liquid, reducing the filtration efficiency. To address the issue of high spare parts replacement costs due to the low strength of existing filters, utility model patent CN201920605361.7 discloses "A Cylindrical Filter Cartridge for a Refined Acid Thickener," which includes a sintered filter cartridge and upper and lower end caps sealed and fixed at both ends of the sintered filter cartridge. The sintered filter cartridge is installed inside the feed cylinder at the top of an inverted conical tank. The upper end cap has a suction backwash pipe extending into the interior of the sintered filter cartridge. The suction backwash pipe outside the sintered filter cartridge is connected to the connecting pipe inside the feed cylinder via a connecting flange. The cylindrical filter cartridge, which uses a multi-layer mesh and skeleton sintering, further enhances the strength of the filter element. At the same time, it reduces stress concentration and deformation that lead to material fatigue and filter wire breakage, effectively increasing the service life of the filter element and reducing the operating cost of the equipment.

[0003] While the aforementioned patents effectively improve the strength of the filter, the filter is difficult to clean and replace, resulting in a high overall replacement cost. Utility Model Content

[0004] The purpose of this invention is to provide a filter with a quick-replacement filter screen, which solves the problem of existing filters having difficult-to-clean and replace filter screens.

[0005] To achieve the above objectives, the basic solution provided by this utility model is as follows: a filter with a quick-replacement filter screen, comprising a filter cartridge frame and clamps. The filter cartridge frame includes a bottom tray, a support plate, and a flange seat. A frame support mesh is fixedly connected to the bottom tray. A central liquid extraction pipe is provided inside the frame support mesh. Both the central liquid extraction pipe and the frame support mesh are fixedly connected to the support plate. The central liquid extraction pipe passes through the support plate and is fixedly connected to the flange seat. An unfolded filter screen is fitted outside the frame support mesh. A filter screen protective sleeve is fitted outside the filter screen. The filter screen protective sleeve and the filter screen are detachably connected to the frame support mesh via clamps.

[0006] The principle and beneficial effects of this utility model are as follows: First, the liquid to be filtered enters from the outside between the filter screen protective sleeve and the filter screen, passes through the filter screen, and enters the interior of the skeleton support net, where it is extracted and output by the central extraction pipe. Second, the filter screen is fitted over the skeleton support net and wrapped by the filter screen protective sleeve. The entire assembly is detachably connected to the skeleton support net via clamps. The filter cartridge skeleton forms a stable support structure through the bottom tray, skeleton support net, support plate, and flange seat. The central extraction pipe is sequentially fixed to the support plate and flange seat, ensuring the overall structural stability and smooth fluid flow. The detachable clamp connection allows for quick assembly and disassembly of the filter screen protective sleeve and filter screen, significantly improving filter screen replacement efficiency. Simultaneously, the skeleton support net and the central extraction pipe provide stable support, ensuring the strength of the filtration structure while protecting the filter screen through the filter screen protective sleeve, thus extending the filter's service life and ease of use. The overall structure is compact and easy to assemble and disassemble, making it suitable for applications requiring frequent filter screen replacement.

[0007] Option 2, which is a preferred option of the basic option, has a groove 1 on the surface of the bottom tray where the skeleton support mesh is fixed. The outer diameter of the groove 1 is larger than the outer diameter of the filter screen protective sleeve, and the inner diameter is the outer diameter of the skeleton support mesh. The groove 1 can prevent the filter screen protective sleeve and the filter screen from falling off from the bottom tray.

[0008] Option 3, which is a preferred option of the basic option, has a groove 2 on the outer side of the skeleton support mesh near the support plate to prevent the filter screen and filter screen protective sleeve from falling off the support plate.

[0009] Option 4, which is a preferred option of the basic option, is that the central liquid extraction pipe is coaxial with the skeleton support net, the end of the central liquid extraction pipe that is not connected to the flange seat is closed, and multiple liquid extraction holes are evenly opened on part of the central liquid extraction pipe within the skeleton support net to ensure the uniformity of filter filtration.

[0010] Option 5, which is a preferred option of Option 4, features a handle on the outer side of the central suction tube near the flange seat, improving operational convenience and safety.

[0011] Option 6, which is a preferred option of the basic option, is that the filter screen is unfolded into a sheet shape. One end of the filter screen has several snap-fit ​​protrusions, and the other end has a slot that matches the size of the snap-fit ​​protrusions. When in use, the filter screen is wrapped around the outside of the frame support net and the two ends are snapped together to form a cylindrical shape, which improves the efficiency of filter screen installation and disassembly.

[0012] Option 7, which is a preferred option of the basic option, is that the filter screen protective sleeve is the same height as the filter screen and matches the size of the frame support net. When in use, the two ends are placed in groove one and groove two respectively, and then fixed with clamps to prevent relative displacement between the filter screen, the filter screen protective sleeve and the frame support net. Attached Figure Description

[0013] Figure 1This is an installation diagram of a filter with a quick-change filter screen according to the present invention;

[0014] Figure 2 This is a perspective view of the filter cartridge skeleton in a filter with a quick-change filter screen according to this utility model;

[0015] Figure 3 This is a perspective view of the unfolded state of the filter screen in a filter with a quick-change filter screen according to this utility model;

[0016] Figure 4 This is a three-dimensional view of the filter screen in use in a filter with a quick-replacement filter according to this utility model;

[0017] Figure 5 This is a perspective view of a filter screen protective cover in a filter with a quick-replacement filter according to this utility model;

[0018] Figure 6 This is a perspective view of the clamp in a filter for quick filter replacement according to this utility model.

[0019] The reference numerals in the accompanying drawings of the instruction manual include: 1. Filter cartridge frame, 11. Bottom tray, 111. Groove I, 12. Frame support mesh, 121. Groove II, 13. Central suction tube, 131. Suction hole, 132. Handle, 14. Flange seat, 15. Support plate, 2. Filter screen, 21. Snap-fit ​​protrusion, 22. Slot, 3. Filter screen protective sleeve, 4. Clamp. Detailed Implementation

[0020] The present invention will be further described in detail below through specific embodiments:

[0021] Example

[0022] like Figures 1 to 6As shown: A filter with a quick-change filter screen includes a filter cartridge frame 1 and a clamp 4. The filter cartridge frame 1 includes a bottom tray 11, a support plate 15, and a flange seat 14. A frame support mesh 12 is fixedly connected to the bottom tray 11. A groove 111 is provided on the same surface of the bottom tray 11 where the frame support mesh 12 is fixed. A groove 121 is provided on the outer side of the frame support mesh 12 away from the bottom tray 11. A central liquid extraction pipe 13 is provided inside the frame support mesh 12. The central liquid extraction pipe 13 and the frame support mesh 12 are coaxially fixed to the support plate 15. Pipe 13 passes through support plate 15 and is fixed to flange seat 14. The central liquid extraction pipe 13 is located inside the skeleton support net 12 and has several evenly distributed liquid extraction holes 131. The central liquid extraction pipe 13 is provided with a handle 132 near flange seat 14. The filter screen 2 has a snap-fit ​​protrusion 21 on one side and a snap-fit ​​groove 22 that matches the size of the snap-fit ​​protrusion 21 on the other side. The filter screen 2 is snapped around the outside of the skeleton support net 12 to form a cylindrical shape. The filter screen protective sleeve 3 is put on the outside of the filter screen 2. The two ends of the filter screen 2 and the filter screen protective sleeve 3 are fixed to the outside of the skeleton support net 12 by clamps 4.

[0023] The implementation method of this embodiment is as follows:

[0024] Before using this filter, firstly, make the filter cartridge frame 1. Select a single-opening pipe as the central liquid extraction pipe 13. Evenly open several liquid extraction holes 131 at the end near the sealing port. Fix the flange seat 14 to the open end and set a handle 132 near the flange seat 14. Then, pass the central liquid extraction pipe 13 through the support plate 15 and fix it thereto. All the liquid extraction holes 131 are located on one side of the support plate 15. Then, fix one end of the frame support net 12 with the groove 121 coaxially with the central liquid extraction pipe 13 to the support plate 15. Finally, fix the bottom tray 11 with the groove 111 to the other end of the frame support net 12. Next, surround the outside of the frame support net 12 with the filter screen 2, which has a snap-fit ​​protrusion 21 and a snap-fit ​​groove 22 on both sides. Then snap it to form a cylindrical shape. Then, put the filter screen protective sleeve 3 on the outside of the filter screen 2 from the flange seat 14. Finally, use two clamps 4 to fix the two ends of the filter screen 2 and the filter screen protective sleeve 3 to the two ends of the frame support net 12.

[0025] When using this filter, hold the handle 132 on the filter cartridge frame 1, connect the liquid pump to the flange seat 14, and then immerse the bottom of the filter in the liquid to be filtered. The liquid passes through the filter screen 2 to obtain clear liquid, and the clear liquid in the filter screen 2 is drawn out from the flange seat 14 through the liquid extraction hole 131.

[0026] When the filter screen protective cover 3 needs to be replaced, simply loosen the upper and lower clamps 4 to easily remove the filter screen protective cover 3. Then, put the new filter screen protective cover 3 on the outside of the filter screen 2 and fix it to the filter cartridge frame 1 with the clamps 4. When the filter screen 2 needs to be replaced, after loosening the upper and lower clamps 4 and removing the filter screen protective cover 3, unfasten the buckles on the filter screen 2 to remove the filter screen 2. Then, wrap the new filter screen 2 around the outside of the frame support net 12 and snap it to form a cylinder. Then, put the filter screen protective cover 3 on and fix it with the clamps 4.

[0027] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A filter with quick-change screen, characterized in that, The filter cartridge frame (1) includes a bottom tray (11), a support plate (15), and a flange seat (14). A frame support net (12) is fixedly connected to the bottom tray (11). A central liquid extraction pipe (13) is provided inside the frame support net (12). The central liquid extraction pipe (13) and the frame support net (12) are both fixedly connected to the support plate (15). The central liquid extraction pipe (13) passes through the support plate (15) and is fixedly connected to the flange seat (14). A filter screen (2) is fitted outside the frame support net (12). The filter screen (2) can be unfolded into a sheet structure. A filter screen protective sleeve (3) is fitted outside the filter screen (2). The filter screen protective sleeve (3) and the filter screen (2) are detachably connected to the frame support net (12) by a clamp (4).

2. The filter with quick-change screen according to claim 1, characterized in that, The bottom tray (11) has a groove (111) on the surface of the skeleton support net (12) fixed to it. The outer diameter of the groove (111) is larger than the outer diameter of the filter screen protective sleeve (3), and the inner diameter of the groove (111) is the outer diameter of the skeleton support net (12).

3. The quick-change screen filter according to claim 1, wherein, The skeleton support net (12) has a groove 2 (121) on the outside near the support plate (15).

4. The quick-change screen filter according to claim 1, wherein, The central liquid extraction pipe (13) is coaxial with the skeleton support net (12). The end of the central liquid extraction pipe (13) that is not connected to the flange seat (14) is closed. The portion of the central liquid extraction pipe (13) within the skeleton support net (12) is evenly provided with multiple liquid extraction holes (131).

5. A quick-change screen filter according to claim 4, wherein, A handle (132) is provided on the outside of the central suction tube (13) near the flange seat (14).

6. The quick-change screen filter according to claim 1, wherein, The filter screen (2) has several snap-fit ​​protrusions (21) at one end and a slot (22) at the other end that matches the size of the snap-fit ​​protrusions (21).

7. The quick-change screen filter according to claim 1, wherein, The filter screen protective sleeve (3) is the same height as the filter screen (2) and matches the size of the skeleton support net (12).

Images