A fluid filtering mechanism and preparation method thereof

Abstract

This invention proposes a fluid filtration mechanism, comprising multiple filter components, a connecting component for connecting two filter components, and a positioning structure mounted on the filter components. Each filter component includes a support member, filter holes evenly distributed on the top surface of the support member, a filter element disposed within the filter holes and integrally formed with the support member through a sintering process, and a fiber sintered felt detachably mounted on the top or bottom of the support member. The connecting component is disposed on the support member. This invention, by forming the filter element and support member into an integral structure, avoids gaps between them, increases the tightness between them, and ensures that fluid does not bypass the filter element through gaps, thereby ensuring complete fluid filtration, improving filtration efficiency, and enhancing product quality.

Description

Technical Field

[0001] This invention relates to the field of fluid filtration technology, specifically to a fluid filtration mechanism and its preparation method. Background Art

[0002] Fluid filtration is a technology used to remove unwanted impurities, particles, microorganisms, or other contaminants from fluids (including liquids and gases). In many manufacturing processes, such as food, beverage, pharmaceutical, and chemical industries, fluid filtration is a critical step in ensuring product quality. By removing impurities and contaminants from fluids, product contamination can be avoided, ensuring product purity and safety.

[0003] The fluids in the aforementioned fields are generally high-temperature, high-pressure, high-viscosity, and highly corrosive fluids, requiring high-performance filter materials to filter and purify them.

[0004] Currently, filter materials made from sintered fiber felt or special powder sintering are commonly used for filtering fluids subjected to high temperature, high pressure, high viscosity, and high corrosiveness. Sintered fiber felt uses metal fibers as raw material and is a felt-like material made from metal fibers through a specific process. The filtration accuracy of sintered fiber felt mainly depends on the size of the pores formed by the fiber stacking and the metal fiber processing technology. Currently, the filtration accuracy of sintered fiber felt is generally 3-100 micrometers. However, sintered fiber felt is relatively soft and cannot be used for filtration under high pressure. It generally requires the use of a support structure. However, gaps exist between the support structure and the sintered fiber felt, creating a gap between the filter material and the support structure. This gap may allow unfiltered media to pass directly through the gap, bypassing the filter material, resulting in reduced filtration efficiency and affecting product quality.

[0005] Special powder sintered filter materials are obtained by sintering metal or ceramic powders. When using this filter material for filtration, existing methods typically involve sintering the material into a plate shape before filtering the fluid. However, when used in high-pressure environments, existing filter materials need to be mounted on supports to prevent deformation. Improper installation, size mismatch, or material properties can lead to gaps between the filter material and the support. These gaps can cause unfiltered media to pass directly through them, bypassing the filter material and reducing filtration efficiency, thus affecting product quality.

[0006] Therefore, how to improve the tightness between the filter material and the support, reduce the gap between the filter material and the support, improve the filtration effect, and ensure the quality of the filter products are urgent technical problems that need to be solved. Summary of the Invention

[0007] The purpose of this invention is to provide a fluid filtration mechanism and its preparation method, thereby solving the problem in the prior art where gaps exist between the filter material and the support components when filtering fluids under high pressure, affecting the fluid filtration effect and product quality.

[0008] To achieve the above objectives, the present invention proposes a fluid filtration mechanism, comprising multiple filter components, a connecting component for connecting two filter components, and a positioning structure mounted on the filter components; each filter component includes a support member, filter holes evenly distributed on the top surface of the support member, a filter element disposed within the filter holes and integrally formed with the support member through a sintering process, and a fiber sintered felt detachably mounted on the top or bottom of the support member; the connecting component is disposed on the support member; the multiple filter components are connected head-to-head, head-to-tail, or tail-to-tail via the connecting component; after the multiple filter components are connected, the fiber sintered felt at the outermost end is positioned and fixed by the positioning structure.

[0009] Optionally, the top and bottom of the support member are provided with mounting grooves corresponding to the fiber sintered felt; the connecting assembly is disposed in the mounting groove, and both ends of the filter hole are connected to the mounting groove.

[0010] Optionally, the bottom of the support member is provided with a connecting hole, which connects the filter hole and the mounting groove located at the bottom of the support member. The depth of the filter hole is greater than the depth of the connecting hole, and the diameter of the connecting hole is smaller than the diameter of the filter hole.

[0011] Optionally, the projected area of ​​the connecting hole on the bottom surface of the support is not less than 50% of the projected area of ​​the filter hole on the bottom surface of the support.

[0012] Optionally, the filter element includes a third filter layer disposed at the bottom of the filter hole and integrally formed with the support, a first filter layer disposed at the opening of the filter hole and integrally formed with the support, and a second filter layer disposed inside the filter hole between the first filter layer and the third filter layer, the second filter layer also being integrally formed with the support; the support is made of metal, and the filter element is made of sintered metal powder.

[0013] Optionally, the mesh count of the first filter layer is less than that of the second filter layer, and the mesh count of the second filter layer is less than that of the third filter layer.

[0014] Optionally, the thicknesses of the first filter layer, the second filter layer, and the third filter layer are all equal, and the sum of the thicknesses of the first filter layer, the second filter layer, and the third filter layer is not greater than the depth of the filter pores; the support member is made of stainless steel.

[0015] Optionally, the connecting assembly includes a connecting sleeve, inserts disposed on the top and bottom of the connecting sleeve, connecting rings disposed on the top and bottom of the connecting sleeve, a control structure mounted on the connecting sleeve, a first locking member movably mounted on the connecting sleeve and the inserts, a second locking member movably mounted on the connecting sleeve and the connecting ring, slots disposed on the top and bottom of the support corresponding to the inserts, and a connecting groove disposed on the support for connecting the slots and the mounting groove.

[0016] Optionally, a guide ring is provided on the inner wall of the connecting sleeve and the connecting ring, and the outer wall of the connecting ring fits against the groove wall of the mounting groove.

[0017] Optionally, each of the connecting components contains at least two control structures, a first locking member, and a second locking member. The control structure is connected to the first locking member and the second locking member, and the control structure controls the movement of the first locking member and the second locking member.

[0018] Optionally, the diameter of the guide ring decreases along the fluid flow direction; the connecting sleeve is provided with a control groove, the control structure is installed in the control groove, and a first sealing block is provided at the opening of the control groove.

[0019] Optionally, both the insert and the connecting ring are provided with a through groove and a movable groove, the groove direction of which is perpendicular to the groove direction of the through groove; one end of the through groove is connected to the control groove, and a second sealing block is installed at the groove opening at the other end.

[0020] Optionally, a limiting structure for limiting the control structure is installed in the control slot.

[0021] The present invention also provides a method for preparing a fluid filtration mechanism, as detailed below:

[0022] S1. The stainless steel sheet is processed into the shape of the support component using machining equipment;

[0023] S2. Use machining equipment to machine blind holes on the support to serve as filter holes;

[0024] S3. Fill the filter holes with the first sintered powder, and then place the support in an isostatic pressing device. Press the first sintered powder under a pressure of 100-200MPa for 1-10 minutes to make the thickness of the first sintered powder one-third of the existing filter hole depth, thus forming the first filter layer.

[0025] S4. Fill the filter holes with a second sintered powder with a mesh size lower than that of the first sintered powder, and place it on top of the first filter layer. Then, place the support in an isostatic pressing device and press the second sintered powder for 1-10 minutes under a pressure of 100-200MPa, so that the thickness of the second sintered powder is one-third of the preset filter hole depth, thus forming the second filter layer.

[0026] S5. Fill the filter holes with sintered powder with a mesh size lower than that of the second sintered powder, and place it on top of the second filter layer. Then, place the support in an isostatic pressing device and press the third sintered powder for 1-10 minutes under a pressure of 100-200MPa, so that the thickness of the third sintered powder is one-third of the preset filter hole depth, thus forming the third filter layer.

[0027] S6. Place the support component, which is filled with the first filter layer, the second filter layer and the third filter layer in the filter hole, into a vacuum sintering furnace for sintering. The vacuum pressure is 0.01Pa-1.0Pa, the sintering temperature is 1050-1350℃, and the heat is maintained for 1-5 hours.

[0028] S7. After naturally cooling to 900℃, the furnace is cooled by air under the protection of inert argon gas and then removed from the furnace. Steps S1 to S6 are repeated to produce multiple filter components with non-overlapping filtration accuracy ranges. The sintering powder can be metal sintering powder.

[0029] S8. After cooling, the support component is processed again by the processing equipment to form mounting grooves on the top and bottom surfaces of the support component, and then a connecting hole is processed on the bottom of the support component.

[0030] Specifically, since the powder shrinks in thickness after sintering, it forms a hollow layer. At this time, the cooled support is processed again by the processing equipment to connect the hollow layer at the top of the multiple filter holes to form the prototype of the mounting groove. Then, the groove depth is controlled by processing the top surface of the support to form the mounting groove. The mounting groove on the bottom surface of the support is processed according to the groove depth of the top mounting groove. Finally, the connecting hole is processed at the bottom of the support.

[0031] S9. Select multiple filter components and place the fiber sintered felt at the fluid inlet of the filter components. Then, based on the maximum mesh size of each filter element, sort the filter elements from smallest to largest. Then, connect the filter elements through the connecting components to form a semi-finished product.

[0032] S10. The fiber sintered felt at the fluid inlet at the very end of the semi-finished product is fixed by the positioning structure.

[0033] Compared with the prior art, the present invention provides a fluid filtration mechanism and its preparation method, which has the following beneficial effects:

[0034] This fluid filtration mechanism and its preparation method form a single structure with the filter element and the support element, thereby avoiding gaps between them, increasing the tightness between them, ensuring that the fluid does not bypass the filter element through gaps, thus ensuring complete filtration of the fluid, reducing or avoiding localized retention and oxidation of the fluid, improving product filtration quality, and enhancing filtration effect.

[0035] Meanwhile, by setting up multiple filter components, the fluid can be filtered in multiple steps, which improves the filtration accuracy, filters impurities in stages, avoids the rapid accumulation of impurities that would affect the filtration speed, extends the cleaning cycle of the filter mechanism, and reduces the labor intensity of workers. The assembly design of the step filter components not only facilitates fine filtration of the fluid, but also facilitates the disassembly and backwashing of subsequent components, extending the service life of the filter components.

[0036] In addition, by connecting multiple filter components, an internal space is formed between the filter components to guide and limit the flow of fluid. This ensures that after the fluid passes through the first filter component, it will inevitably pass through the subsequent filter components, thereby guaranteeing the filtration accuracy of the fluid and improving the filtration precision. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0038] Figure 2 This is a schematic diagram of the structure of the filter component of the present invention.

[0039] Figure 3 This is a cross-sectional view of the filtering component of the present invention.

[0040] Figure 4 This is a schematic diagram of the structure of the support component of the present invention.

[0041] Figure 5 This is a cross-sectional view of the connecting component of the present invention.

[0042] Figure 6 This is a schematic diagram of the control structure of the present invention.

[0043] Figure 7 This is the present invention. Figure 6 A magnified view of a portion of point A in the middle.

[0044] Figure 8 This is a schematic diagram of the limiting structure of the present invention.

[0045] Figure 9 This is a cross-sectional view of the active rack of the present invention.

[0046] Figure 10 This is a schematic diagram of the positioning structure of the present invention.

[0047] Figure 11 This is a schematic diagram showing the connection between the rack and locking element of the present invention.

[0048] The diagram identifies the following components: 1. Filter assembly; 2. Connecting assembly; 21. Connecting sleeve; 211. Control slot; 212. First sealing block; 22. Insert post; 221. Through slot; 222. Movable slot; 223. Second sealing block; 23. Connecting ring; 231. Guide ring; 24. Control structure; 241. Rotating column; 242. Connecting gear; 243. Driving rack; 2431. T-slot; 2432. Clearance slot; 2433. T-block; 2434. Baffle; 2435. Magnet; 2436. Return spring; 244. Driven rack; 245. Connecting post; 246. Moving plate; 247. Mounting post; 248. Control 25. Spring; 25. First locking element; 251. Vertical plate; 2511. Connecting magnet; 252. Horizontal plate; 26. Second locking element; 27. Slot; 28. Connecting groove; 29. ​​Limiting structure; 291. Limiting groove; 292. Sliding column; 293. Slide plate; 294. Limiting block; 295. Guide surface; 296. Limiting frame; 297. Telescopic spring; 3. Support element; 31. Mounting groove; 32. Connecting hole; 4. Filter hole; 5. Filter element; 51. First filter layer; 52. Second filter layer; 53. Third filter layer; 6. Fiber sintered felt; 7. Positioning structure; 71. Positioning ring; 72. Positioning connecting plate; 73. Positioning plate. Detailed Implementation

[0049] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, illustrates the invention. Numerous specific details are set forth in the description below to provide a thorough understanding of the invention. However, the invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0050] The fluid filtration mechanism and its preparation method described in this application can be applied to high-precision fluid filtration and other similar applications. The fluid filtration mechanism and its preparation method are described in detail below.

[0051] See appendix Figure 1 — Figure 11 The diagram shows a preferred embodiment of a fluid filtration mechanism according to this application. The fluid filtration mechanism includes a plurality of filter components 1, a connecting component 2 for connecting two filter components 1, and a positioning structure 7 mounted on the filter components 1.

[0052] The filter assembly 1 includes a support member 3, filter holes 4 evenly arranged on the top surface of the support member 3, a filter element 5 formed integrally with the support member 3 and disposed within the filter holes 4, and a fiber sintered felt 6 detachably installed on the top or bottom of the support member 3. A connecting assembly 2 is disposed on the support member 3. Multiple filter assemblies 1 are connected head-to-head, head-to-tail, or tail-to-tail through the connecting assembly 2. The positioning structure 7 is used to position and fix the fiber sintered felt 6 at the very end after multiple filter assemblies 1 are connected.

[0053] This invention employs multiple filter components 1 to perform multi-stage filtration of the fluid. The low resistance between the fluid and the filter elements 5 prevents impurities from rapidly accumulating and clogging, ensuring complete and fine filtration and thus improving filtration efficiency and final product quality. The connecting component 2 connects the multiple filter components 1, allowing for easy disassembly, maintenance, cleaning, and replacement of all components. This facilitates work. Furthermore, the connecting component 2 creates an internal filtration space that guides and limits the fluid flow, ensuring that after passing through the first filter element 1, the fluid inevitably passes through the next filter element 1 connected to the connecting component 2. This ensures accurate and complete filtration, improving product quality. Simultaneously, it prevents uncontrolled fluid flow, avoiding leakage from the connection between the connecting component 2 and the support 3 of the other filter element 1, which could lead to fluid stagnation or loss and affect filtration efficiency. The efficiency and filtration quality are affected. The support member 3 supports the filter element 5, improving its mechanical strength and allowing it to operate under higher pressures, thus increasing fluid filtration efficiency. The filter holes 4 provide an installation position for the filter element 5. It should be noted that the filter holes 4 are blind holes, allowing the filter element 5 to be supported during pressing and sintering. The fiber sintered felt 6 pre-filters the fluid before it enters the filter element 5, preferentially intercepting larger impurity particles and preventing them from clogging the filter element 5 and affecting its service life. The positioning structure 7 is used because the fiber sintered felt 6 pre-filters the fluid; therefore, it needs to be installed at the fluid inlet of the filter assembly 1. When multiple filter assemblies 1 are connected by the connecting assembly 2, the fiber sintered felt 6 of the outermost filter assembly 1 is positioned and fixed by the connecting assembly 2, and the positioning structure 7 is used to position and fix the fiber sintered felt 6.

[0054] This invention uses a sintering process to form a single structure between the filter element 5 and the support element 3, ensuring a tight connection between them and preventing gaps from forming. This improves the filtration effect and product quality. Compared to setting a seal between the filter element and the support element, this application eliminates the need for a seal replacement and maintenance process, ensuring that there are no gaps between the filter element and the support element at all times, thus guaranteeing the filtration efficiency and quality of the fluid.

[0055] See appendix Figure 1 — Figure 4 As shown, in this invention, the top and bottom of the support member 3 are provided with mounting grooves 31 corresponding to the fiber sintered felt 6; the connecting component 2 is set in the mounting groove 31, and both ends of the filter hole 4 are connected to the mounting groove 31; wherein, the bottom of the support member 3 is provided with a connecting hole 32, the depth of the filter hole 4 is greater than the depth of the connecting hole 32, and the diameter of the connecting hole 32 is smaller than the diameter of the filter hole 4.

[0056] The present invention provides an installation position for the fiber sintered felt 6 by setting the installation groove 31, preventing the fiber sintered felt 6 from shifting during the fluid filtration process and ensuring that the fiber sintered felt 6 can effectively filter the fluid; the setting of the connecting hole 32 ensures that the fluid filtered by the fiber sintered felt 6 and the filter element 5 can flow out, ensuring that the fluid can flow normally. In addition, the limitation of the depth of the connecting hole 32 reduces the travel distance of the fluid flowing in the connecting hole 32, ensuring that the fluid can pass through the connecting hole 32 quickly, reducing the impact of the connecting hole 32 being too small on the fluid flow rate. By limiting the diameter of the connecting hole 32, the support member 3 can provide mechanical support for the bottom of the filter element 5, improve the mechanical strength of the filter element 5, and enable the filter element 5 to filter the fluid under higher pressure.

[0057] See appendix Figure 1 — Figure 4 As shown, in this invention, the orthographic projection area of ​​the connecting hole 32 on the bottom surface of the support member 3 is not less than 50% of the orthographic projection area of ​​the filter hole 4 on the bottom surface of the support member 3. Specifically, the overlap area between the transparent area of ​​each filter hole 4 on the bottom surface of the support member 3 and the orthographic projection area of ​​the connecting hole 32 on the bottom surface of the support member 3 is not less than 50%, ensuring that each filter hole 4 is connected to a sufficient number of connecting holes 32 for fluid flow and to meet the fluid throughput requirements.

[0058] See appendix Figure 1 — Figure 4As shown, in this invention, the filter element 5 includes a third filter layer 53 disposed at the bottom of the filter hole 4 and integrally formed with the support member 3, a first filter layer 51 disposed at the opening of the filter hole and integrally formed with the support member 3, and a second filter layer 52 disposed inside the filter hole 4 between the first filter layer 51 and the third filter layer 53. The second filter layer 52 is also integrally formed with the support member 3. The support member 3 is made of metal, and the filter element 5 is made of sintered metal powder.

[0059] It should be noted that the metal powder can be 304 stainless steel powder, 316L stainless steel powder, Hastelloy powder, 310S stainless steel powder, titanium powder, and iron-chromium-aluminum metal powder or mixed powder; the mesh size of the first filter layer 51 is smaller than that of the second filter layer 52, and the mesh size of the second filter layer 52 is smaller than that of the third filter layer 53.

[0060] This invention forms a filter material by sintering metal powder, which, during the sintering process, also fuses with a support member 3 made of stainless steel to form an integrated structure. By configuring a first filter layer 51, a second filter layer 52, and a third filter layer 53, this application generates multiple gradient filter layers, allowing each filter element 5 to perform multiple gradient filtrations of the fluid. This ensures filtration accuracy and efficiency, improves product filtration quality, and, combined with the mesh size limitations of each filter layer, enables layered gradient filtration of the fluid, preventing the accumulation of impurities on the same filter layer and extending the service life of the filter element 5.

[0061] See appendix Figure 1 — Figure 4 As shown, in this invention, the thicknesses of the first filter layer 51, the second filter layer 52, and the third filter layer 53 are all equal, and the sum of the thicknesses of the first filter layer 51, the second filter layer 52, and the third filter layer 53 is not greater than the depth of the filter hole 4; the support member 3 is made of stainless steel.

[0062] This invention limits the thickness of the filter layer to ensure that each filter layer is evenly distributed, thus ensuring uniform filtration effect and that the thickness of the filter element 5 does not exceed the depth of the filter hole 4.

[0063] See appendix Figure 1 and Figure 5As shown, in this invention, the connecting assembly 2 includes a connecting sleeve 21, inserts 22 disposed on the top and bottom of the connecting sleeve 21, a connecting ring 23 disposed on the top and bottom of the connecting sleeve 21, a control structure 24 mounted on the connecting sleeve 21, a first locking member 25 movably mounted on the connecting sleeve 21 and the inserts 22, a second locking member 26 movably mounted on the connecting sleeve 21 and the connecting ring 23, slots 27 corresponding to the inserts 22 disposed on the top and bottom of the support member 3, and a connecting groove 28 disposed on the support member 3 for connecting the slots 27 and the mounting groove 31.

[0064] The present invention uses a connecting sleeve 21 to connect two adjacent filter components 1, forming a filter space. A post 22, in conjunction with a connecting ring 23, limits the movement of the connecting sleeve 21 in the axial direction, and the connecting ring 23 also limits the movement of the fiber sintered felt 6. A control structure 24 controls the movement of the first locking member 25 and the second locking member 26, allowing them to engage and connect with the support member 3, thereby limiting the axial movement of the connecting sleeve 21 and thus limiting the connection component 2. A slot 27 avoids and limits the post 22. A connecting groove 28 avoids the first locking member 25 and the second locking member 26, allowing them to engage and limit the movement of the connecting sleeve 21.

[0065] See appendix Figure 5 and Figure 6 As shown, in this invention, the inner walls of the connecting sleeve 21 and the connecting ring 23 are provided with guide rings 231, and the outer wall of the connecting ring 23 fits against the groove wall of the mounting groove 31; each connecting assembly 2 contains at least two control structures 24, first locking members 25, and second locking members 26, and the control structure 24 is connected to the first locking members 25 and the second locking members 26. By limiting the number of control structures 24, first locking members 25, and second locking members 26, this application ensures that both ends of the connecting sleeve 21 have control structures 24, first locking members 25, and second locking members 26, thus ensuring that both ends of the connecting sleeve 21 can be connected to the filter assembly 1.

[0066] The present invention uses the guide ring 231 to guide the fluid passing through the filter assembly 1, so that the fluid can smoothly enter the next filter assembly 1, guide the flow direction of the fluid, prevent the fluid from changing its flow direction due to the obstruction of the next filter assembly 1, increase the fluid flow rate, and ensure improved filtration efficiency.

[0067] See appendix Figure 5As shown, in this invention, the diameter of the guide ring 231 decreases along the fluid flow direction; the connecting sleeve 21 is provided with a control groove 211, and the control structure 24 is installed in the control groove 211. A first sealing block 212 is provided at the opening of the control groove 211; both the insert post 22 and the connecting ring 23 are provided with a through groove 221 and a movable groove 222. The opening direction of the movable groove 222 is perpendicular to the opening direction of the through groove 221; one end of the through groove 221 is connected to the control groove 211, and a second sealing block 223 is installed at the opening of the other end.

[0068] This application guides the flow direction of fluid by adjusting the inner diameter of the guide ring 231. Furthermore, by reducing the inner diameter of the guide ring 231, the fluid flow rate changes little or not at all due to the constant pressure acting on the fluid, thus increasing the flow velocity. Additionally, after guiding the fluid, it is directed directly to the middle position of the next filter component 1, away from the connection point between the connecting component 2 and the filter component 1. This effectively prevents fluid from flowing out of the connection point, avoiding fluid stagnation or loss, and ensuring product filtration quality while maintaining... The system ensures product filtration efficiency; the control groove 211 provides an installation position for the control structure 24; the first sealing block 212 is used to seal the control groove 211; the through groove 221 and the movable groove 222 are used for the installation of the first locking member 25 and the second locking member 26, while the movable groove 222 provides conditions for the first locking member 25 and the second locking member 26 to move and cooperate; the second sealing block 223 prevents the first locking member 25 and the second locking member 26 from separating from the through groove 221.

[0069] See appendix Figure 5 — Figure 8As shown, in this invention, the connecting sleeve 21, insert post 22, connecting ring 23, and guide ring 231 are integrally formed; the control structure 24 includes a rotating post 241 installed in the control groove 211, a connecting gear 242 movably installed on the rotating post 241, a driving rack 243 and a driven rack 244 movably installed in the control groove 211 and meshing with the connecting gear 242, a connecting post 245 installed at the end of the driving rack 243 and located in the control groove 211, and a connecting post 245 installed on the connecting post 245. A movable plate 246 is mounted on the control groove 211 and on the end of the movable plate 246 away from the connecting post 245. Control springs 248 are fitted onto the two mounting posts 247. A first locking member 25 is connected to the driving rack 243, and a second locking member is connected to the driven rack 244. The driving rack 243 and the driven rack 244 are located on opposite sides of the connecting gear 242 and are parallel to each other. When the driving rack 243 moves, the driven rack 244 moves in the opposite direction. It should be noted that by limiting the depth of the control groove 211, the movement range of the driving rack 243 can be limited. Combined with the setting of the first sealing block 212, the meshing relationship between the driving rack 243 and the connecting gear 242 is ensured, thus ensuring that the movement range of the driving rack 243 can be limited.

[0070] The present invention defines the installation position of the connecting gear 242 by setting the rotating column 241; the connecting gear 242 allows the driving rack 243 to drive the driven rack 244 to move, so that the first locking member 25 on the driving rack 243 and the second locking member 26 on the driven rack 244 can move closer or further away simultaneously, thereby allowing the first locking member 25 and the second locking member 26 to cooperate; the driving rack 243 allows the operator to operate the first locking member 25 and the second locking member 26. The locking member 26 is controlled; the setting of the connecting post 245 creates a gap between the moving plate 246 and the active rack 243, ensuring that the limiting structure 29 can limit the moving plate 246; the setting of the mounting post 247 provides an installation position for the control spring 248; the setting of the control spring 248 serves as a power source, storing energy when the first locking member 25 and the second locking member 26 are engaged, and releasing energy when the first locking member 25 and the second locking member 26 are separated, thereby driving the active rack 243 to move.

[0071] See appendix Figure 5 — Figure 11As shown, both the first locking member 25 and the second locking member 26 are assembled from a vertical plate 251 and a horizontal plate 252. The vertical plate 251 is mounted on the active rack 243 or the driven rack 244, and the horizontal plate 252 is mounted through a connecting groove 28. The thickness of the horizontal plate 252 is half the height of the connecting groove 28. The vertical plate 251 is made of magnetic material. Both the active rack 243 and the driven rack 244 are equipped with connecting magnets 2511 that are connected to the vertical plate 251. The plane of the vertical plate 251 in the first locking member 25 facing the depth of the control groove 211 is connected to the connecting magnet 2511 on the active rack 243. The plane of the vertical plate 251 in the second locking member 26 facing the opening of the control groove 211 is in contact with the connecting magnet 2511 on the driven rack 244.

[0072] See appendix Figure 5 — Figure 8 As shown, in this invention, the limiting structure 29 includes a limiting groove 291 disposed on the wall of the control groove 211, a sliding column 292 installed in the limiting groove 291, a sliding plate 293 slidably installed on the sliding column 292, a limiting block 294 installed on the sliding plate 293, a guide surface 295 disposed on the limiting block 294, a limiting frame 296 installed at the opening of the limiting groove 291, and a telescopic spring 297 fitted on the sliding column 292.

[0073] The present invention guides the movement of the sliding plate 293 and the limiting block 294 by setting the sliding column 292; by setting the sliding plate 293 in conjunction with the limiting frame 296, it ensures that the limiting block 294 is separated from the limiting groove 291, thus limiting the movement stroke of the limiting block 294; by setting the guide surface 295, the limiting block 294 can retract after the moving plate 246 contacts the limiting block 294, thus avoiding the moving plate 246; by setting the telescopic spring 297, the limiting block 294 can be pushed to reset after the moving plate 246 moves too far.

[0074] See appendix Figure 5 — Figure 11As shown, in this invention, the active rack 243 is also provided with a T-slot 2431. The opening of the T-slot 2431 is located at the end away from the connecting post 245. The active rack 243 has a clearance groove 2432 on its outer wall near the limiting structure 29, which communicates with the T-slot 2431. A T-block 2433 is installed in the T-slot 2431. A baffle 2434, made of magnetic material, is located in the clearance groove 2432 and connected to the T-block 2433. Magnets 2435 are installed on the wall of the control groove 211, above and below the limiting groove 291. A return spring 2436 is installed on the T-block 2433, contacting the bottom of the T-slot 2431. It should be noted that the active rack 243 is marked with a locking line and a return line, facilitating the operator's control of the active rack 243's movement range. It should be noted that both the movable plate 246 and the baffle 2434 are provided with mating surfaces corresponding to the guide surface 295.

[0075] The present invention provides an installation position and guide for the T-block 2433 by setting the T-slot 2431; provides an installation position and guide for the baffle 2434 by setting the clearance slot 2432; the baffle 2434 can block the limiting block 294, so that the moving plate 246 can be reset; the magnet 2435 can temporarily limit the baffle 2434, so that the baffle 2434 can be temporarily stationary when the active rack 243 moves; and the reset spring 2436 pushes the T-block 2433 and the baffle 2434 to reset.

[0076] See appendix Figure 1 — Figure 11 As shown, the process of connecting component 2 and filter component 1 in this invention is as follows:

[0077] First, align the insert 22 and connecting ring 23 on one end of the connecting sleeve 21 with the filter assembly 1 and insert them so that the insert 22 is inserted into the slot 27 of the filter assembly 1 and the connecting ring 23 fits into the mounting groove 31. If the connection between the connecting assembly and the filter assembly 1 is the inlet end of the filter assembly 1, the fiber sintered felt 6 needs to be placed first and then the connecting sleeve 21 is put on.

[0078] The second step involves the staff pushing the corresponding active rack 243 to move, causing the first locking member 25 and the second locking member 26 to move, so that the two horizontal plates 252 are inserted into the connecting groove 28, and the connecting sleeve 21 is connected to the support member 3.

[0079] Third, repeat the first and second steps, and connect the other end of the connecting sleeve 21 to another filter component 1 in the same way, and so on, to connect multiple filter components 1 as needed;

[0080] Fourth step: After multiple filter components 1 are connected by connecting components 2, fiber sintered felt 6 is placed in the mounting groove 31 at the fluid inlet at the far end, and then positioned by positioning structure 7.

[0081] Specifically, in the second step, when the operator pushes the active rack 243 into the control slot 211, the active rack 243 drives the connecting gear 242 meshing with it to rotate, and at the same time drives the connecting magnet 2511 on the active rack 243 to move. The connecting magnet 2511 drives the first locking member 25 connected to it to move. The connecting gear 242 synchronously drives the driven rack 244 to move. The connecting magnet 2511 on the driven rack 244 drives the second locking member 26 to move, so that the two horizontal plates 252 are inserted into the connecting slot 28.

[0082] When the operator pushes the active rack 243 to move, the active rack 243 will drive the moving plate 246 to move through the connecting post 245. During the movement, the moving plate 246 is limited by the limiting block 294 and compresses the control spring 248. At this time, the mating surface on the moving plate 246 is in contact with the guide surface 295. As the operator continues to push the active rack 243, the moving plate 246 climbs along the guide surface 295, that is, the limiting block 294 compresses the extension spring 297 to the limiting position. The moving plate 246 moves within the groove 291 until it passes the limit block 294. At this point, the limit block 294 is reset by the elastic force provided by the telescopic spring 297. The operator stops pushing the active rack 243 and controls the elastic force of the spring 248 to push the active rack 243 to reset. At this point, the active rack 243 is limited by the limit block 294 and cannot reset. The operator also cannot pull the active rack 243 outward, indicating that the engagement of the first locking member 25 and the second locking member 26 is complete.

[0083] When it is necessary to disassemble and separate filter assembly 1 and connecting assembly 2, the specific operation is as follows:

[0084] The operator continues to press the active rack 243, which drives the T-block 2433 and the baffle 2434 to continue moving. When the baffle 2434 contacts the limiting block 294, the operator continues to push the active rack 243. The baffle 2434 climbs along the guide surface 295 through the mating surface, causing the limiting block 294 to extend and retract into the limiting groove 291. At this time, the baffle 2434 contacts the magnet 2435, blocking the limiting block 294 and preventing it from limiting the moving plate 246. Then, the operator releases the active rack 243. At this time, the control spring 248 pushes the moving plate 246 to move, and the moving plate 246 drives the active rack 243 to move. The active rack 243 and the moving plate 246 move together. During the movement, the baffle 2434 will not move due to the action of the magnet 2435 until the moving plate 246 contacts the baffle 2434. At this time, the elastic force of the control spring 248, combined with the elastic force of the reset spring 2436, pushes the baffle 2434 to separate from the magnet 2435. Subsequently, the active rack 243 and the driven rack 244 reset, and the reset spring 2436 pushes the T-block 2433 to reset, so that the baffle 2434 is reset. During the reset of the active rack 243 and the driven rack 244, the connecting magnet 2511 pushes the vertical plate 251 to reset, so that the first locking member 25 and the second locking member 26 are reset, and the two horizontal plates 252 are removed from the connecting groove 28. At this time, the connecting sleeve 21 and the support member 3 are separated.

[0085] See appendix Figure 1 and Figure 10 As shown, in this invention, the positioning structure 7 includes a positioning ring 71, a positioning connecting plate 72 disposed on the top of the positioning ring 71, and a positioning plate 73 disposed on the positioning connecting plate 72 and adapted to the slot 27. The positioning plate 73 is equipped with a high-temperature resistant rubber sleeve. Alternatively, the positioning connecting plate 72 can be fixed to the support member 3 by bolts.

[0086] See appendix Figure 1 — Figure 11 As shown, different filtering effects can be achieved by arranging the filter components 1 in this application. This application describes two filter components 1 in conjunction with a connecting component 2, and the plane of the support member 3 closest to the first filter layer 51 is the top surface of the support member 3, while the plane of the support member 3 closest to the third filter layer 53 is the bottom surface of the support member 3. The specific arrangement is as follows:

[0087] 1. The bottom surface of the first filter component 1 is connected to the top surface of the second filter component 1 through the connecting component 2, and the maximum mesh number of the filter element 5 in the first filter component 1 is less than the maximum mesh number of the filter element 5 in the second filter component 1.

[0088] Fluid enters from the top of the first filter assembly 1, passes through the sintered fiber felt 6 in the first filter assembly 1, and then through the filter element 5 in the first filter assembly 1 for filtration. It then flows out through the connecting hole 32 in the first filter assembly 1, enters the connecting sleeve 21, and is guided by the guide ring 231 inside the connecting sleeve 21 to the sintered fiber felt 6 in the second filter assembly 1. It then passes through the filter element 5 in the second filter assembly 1 for filtration, and finally flows out through the connecting hole 32 in the second filter assembly 1, completing the filtration process. This connection method performs multiple filtrations on the fluid, with the filtration accuracy gradually increasing, effectively ensuring filtration precision, improving product quality, and providing a relatively stable fluid flow rate, making it suitable for fluid filtration under general conditions.

[0089] 2. The bottom surface of the first filter component 1 is connected to the bottom surface of the second filter component 1 through the connecting component 2, and the maximum mesh number of the filter element 5 in the first filter component 1 is less than the maximum mesh number of the filter element 5 in the second filter component 1.

[0090] This connection method involves first coarsely filtering the fluid through the first filter component 1, and then, when the fluid enters the second filter component 1 for further filtration, it directly passes through the third filter layer 53 of the second filter component 1 for high-precision filtration. At this time, some impurities will be filtered into the connecting component between the first and second filter components 1, or onto the fiber sintered felt 6 of the second filter component 1, and these impurities can be collected. This connection method is suitable for situations where the impurities are hazardous, such as heavy metals or toxic chemicals, or where certain metal ions or organic solvents have recycling value and can be reused through specific recycling processes.

[0091] 3. The top surface of the first filter component 1 is connected to the top surface of the second filter component 1 through the connecting component 2, and the maximum mesh number of the filter element 5 in the first filter component 1 is less than the maximum mesh number of the filter element 5 in the second filter component 1.

[0092] This connection method is similar to the second connection method, but compared to the second method which filters impurities and collects them in the connecting component 2, this connection method filters impurities evenly in the second filter component 1. This prevents impurities from falling out when the connecting component 2 is disassembled from the two filter components 1 during impurity collection. In this connection method, the impurities are contained in the second filter component 1 and need to be flushed out by backwashing to ensure that the impurities do not fall out during disassembly. Backwashing can be carried out in a special backwashing machine to prevent impurities from scattering randomly.

[0093] In the filter assembly 1 of this application, the fiber sintered felt 6 can be disassembled and cleaned, and the filter element 5 can be rinsed by backwashing. Moreover, during backwashing, the mesh size of the filter layer increases, and there is no situation where the filter pore size blocks impurities. Specifically, the impurities in the third filter layer 53 will move to the second filter layer 52, avoiding the long-distance movement of impurities in the same mesh filter layer, which would cause impurities to accumulate and cause blockage. Therefore, the filter assembly 1 of this application can clean impurities by backwashing, thus extending the service life of the filter assembly 1.

[0094] It should be noted that when multiple filter components 1 are connected through connecting component 2, the filtration accuracy ranges of the filter components 1 must not overlap. For example, if the maximum mesh count of one filter component 1 is 200, then the minimum mesh count of another filter component 1 must not be less than 200.

[0095] The present invention also provides a method for preparing a fluid filtration mechanism, as follows:

[0096] S1. The stainless steel sheet is processed into the shape of the support 3 using machining equipment. Specifically, the support 3 can be any shape with a flat top and bottom. The stainless steel sheet is used as the material of the support 3 to ensure the support strength of the support 3, while the metal powder can be fused with the support 3 to form an integral structure during sintering.

[0097] S2. A blind hole is machined on the support 3 using a machining equipment to serve as a filter hole 4. Specifically, the blind hole machined at this time is the depth of the filter hole 4 plus the depth of one of the mounting grooves 31, in preparation for the subsequent machining of the mounting groove 31.

[0098] S3. Fill the first sintered powder into the filter hole 4, and then place the support 3 into the isostatic pressing equipment. Press the first sintered powder for 1-10 minutes under a pressure of 100-200MPa so that the thickness of the first sintered powder is one-third of the preset filter hole 4 depth, forming the first filter layer.

[0099] S4. Fill the filter hole 4 with a second sintered powder with a mesh size lower than that of the first sintered powder, and place it on top of the first filter layer. Then, place the support 3 into the isostatic pressing equipment and press the second sintered powder for 1-10 minutes under a pressure of 100-200MPa, so that the thickness of the second sintered powder is one-third of the preset filter hole 4 depth, thus forming the second filter layer.

[0100] S5. Fill the filter hole 4 with sintered powder with a mesh size lower than that of the second sintered powder, and place it on top of the second filter layer. Then, place the support 3 into the isostatic pressing equipment and press the third sintered powder for 1-10 minutes under a pressure of 100-200MPa, so that the thickness of the third sintered powder is one-third of the preset filter hole 4 depth, thus forming the third filter layer.

[0101] S6. The support 3, which is filled with the first filter layer, the second filter layer and the third filter layer in the filter hole 4, is placed in a vacuum sintering furnace for sintering. The vacuum pressure is 0.01Pa-1.0Pa, the sintering temperature is 1050-1350℃, and the holding time is 1-5 hours. It should be noted that the sintering temperature will not melt the support 3 made of stainless steel.

[0102] S7. After naturally cooling to 900℃, the furnace is cooled by air under the protection of inert argon gas and then removed from the furnace. Steps S1 to S6 are repeated to produce multiple filter components 1, and the filtration accuracy ranges do not overlap. The sintering powder can be metal sintering powder.

[0103] S8. Since there is shrinkage in thickness after powder sintering, a void layer is formed after the powder shrinkage. At this time, the cooled support 3 is processed again by the processing equipment to connect the void layer at the top of the multiple filter holes 4 to form the prototype of the mounting groove 31. Then, the groove depth is controlled by processing the top surface of the support 3 to form the mounting groove 31. The mounting groove 31 on the bottom surface of the support is processed according to the groove depth of the top surface mounting groove 31.

[0104] It should be noted that since the filter element 5 is sintered and then the installation groove 31 is formed, the top of the filter element 5 can be leveled, which facilitates the installation of the fiber sintered felt 6 during use and avoids the situation where the fiber sintered felt 6 cannot be tightly attached to the bottom of the installation groove 31. This allows more fluid to pass through the fiber sintered felt 6 before being filtered by the filter element 5.

[0105] S9. Select multiple filter components 1 and place the fiber sintered felt 6 at the fluid inlet of the filter component 1. Then, based on the maximum mesh number on each filter element 5, sort the filter elements 5 from smallest to largest. Then, connect the corresponding filter components 1 through the connecting component 2 to form a semi-finished product.

[0106] S10. The fiber sintered felt 6 at the fluid inlet at the very end of the semi-finished product is fixed by the positioning structure 7.

[0107] It should be noted that the entire processing of connecting component 2 is carried out by machining, so it will not be described in detail here.

[0108] The above embodiments are illustrative of this application and are not intended to limit this application. Any simple modifications to this application are within the protection scope of this application.

Claims

1. A fluid filtration mechanism, characterized in that, It includes multiple filter components (1), a connecting component (2) for connecting two filter components (1), and a positioning structure (7) installed on the filter components (1); The filter assembly (1) includes a support (3), filter holes (4) evenly arranged on the top surface of the support (3), a filter (5) arranged in the filter holes (4) and formed into an integral structure with the support (3) by sintering process, and a fiber sintered felt (6) detachably installed on the top or bottom of the support (3). The connecting assembly (2) is arranged on the support (3). Multiple filter components (1) are connected head-to-head, head-to-tail, or tail-to-tail via connecting components (2); After multiple filter components (1) are connected, the fiber sintered felt (6) at the very end is positioned and fixed by the positioning structure (7); The bottom of the support member (3) is provided with a connecting hole (32), which connects the filter hole (4) and the mounting groove (31) located at the bottom of the support member (3). The depth of the filter hole (4) is greater than the depth of the connecting hole (32), and the diameter of the connecting hole (32) is smaller than the diameter of the filter hole (4). The fluid filtered by the fiber sintered felt (6) and the filter element (5) flows out through the connecting hole (32); The filter element (5) is made of sintered metal powder.

2. The fluid filtration mechanism according to claim 1, characterized in that, The support member (3) has mounting grooves (31) at its top and bottom corresponding to the fiber sintered felt (6); the connecting component (2) is set in the mounting groove (31), and both ends of the filter hole (4) are connected to the mounting groove (31).

3. The fluid filtration mechanism according to claim 1, characterized in that, The projected area of ​​the connecting hole (32) on the bottom surface of the support (3) is not less than 50% of the projected area of ​​the filter hole (4) on the bottom surface of the support (3).

4. The fluid filtration mechanism according to claim 1, characterized in that, The filter element (5) includes a third filter layer (53) disposed at the bottom of the filter hole (4) and integral with the support member (3), a first filter layer (51) disposed at the opening of the filter hole (4) and integral with the support member (3), and a second filter layer (52) disposed in the filter hole (4) between the first filter layer (51) and the third filter layer (53), the second filter layer (52) also being integral with the support member (3); the support member (3) is made of metal.

5. The fluid filtration mechanism according to claim 4, characterized in that, The mesh count of the first filter layer (51) is less than that of the second filter layer (52), and the mesh count of the second filter layer (52) is less than that of the third filter layer (53); The thicknesses of the first filter layer (51), the second filter layer (52), and the third filter layer (53) are all equal, and the sum of the thicknesses of the first filter layer (51), the second filter layer (52), and the third filter layer (53) is not greater than the depth of the filter hole (4). The support member (3) is made of stainless steel.

6. The fluid filtration mechanism according to claim 2, characterized in that, The connecting assembly (2) includes a connecting sleeve (21), a pin (22) disposed on the top and bottom of the connecting sleeve (21), a connecting ring (23) disposed on the top and bottom of the connecting sleeve (21), a control structure (24) mounted on the connecting sleeve (21), a first locking member (25) movably mounted on the connecting sleeve (21) and the pin (22), a second locking member (26) movably mounted on the connecting sleeve (21) and the connecting ring (23), a slot (27) disposed on the top and bottom of the support member (3) corresponding to the pin (22), and a connecting groove (28) disposed on the support member (3) for connecting the slot (27) and the mounting groove (31).

7. The fluid filtration mechanism according to claim 6, characterized in that, The inner walls of the connecting sleeve (21) and the connecting ring (23) are provided with guide rings (231), and the outer wall of the connecting ring (23) is in contact with the groove wall of the mounting groove (31); Each of the connecting components (2) contains at least two control structures (24), a first locking member (25), and a second locking member (26). The control structure (24) is connected to the first locking member (25) and the second locking member (26), and the control structure (24) controls the movement of the first locking member (25) and the second locking member (26).

8. The fluid filtration mechanism according to claim 7, characterized in that, The diameter of the guide ring (231) decreases along the fluid flow direction; The connecting sleeve (21) is provided with a control groove (211), and the control structure (24) is installed in the control groove (211). A first sealing block (212) is provided at the opening of the control groove (211). Both the insert (22) and the connecting ring (23) are provided with a through groove (221) and a movable groove (222), and the groove direction of the movable groove (222) is perpendicular to the groove direction of the through groove (221). One end of the through groove (221) is connected to the control groove (211), and a second sealing block (223) is installed at the opening of the groove at the other end. The control slot (211) is equipped with a limiting structure (29) for limiting the control structure (24).

9. A method for preparing a fluid filtration mechanism, used to prepare the fluid filtration mechanism according to any one of claims 1 to 8, characterized in that, Including the following steps: S1. The stainless steel sheet is processed into the shape of the support (3) using machining equipment; S2. A blind hole is machined on the support (3) using a machining equipment to serve as a filter hole (4). S3. Fill the first sintered powder into the filter hole (4), and then place the support (3) into the isostatic pressing equipment and press the first sintered powder for 1-10 minutes under a pressure of 100-200MPa so that the thickness of the first sintered powder is one-third of the depth of the existing filter hole (4) to form the first filter layer (51). S4. Fill the filter hole (4) with a second sintered powder with a mesh size lower than that of the first sintered powder, and place it on top of the first filter layer (51). Then place the support (3) into the isostatic pressing equipment and press the second sintered powder for 1-10 minutes under a pressure of 100-200MPa, so that the thickness of the second sintered powder is one-third of the depth of the preset filter hole (4), forming the second filter layer (52). S5. Fill the filter hole (4) with a mesh size lower than that of the second sintered powder and place it on top of the second filter layer (52). Then place the support (3) into the isostatic pressing equipment and press the third sintered powder for 1-10 minutes under a pressure of 100-200MPa so that the thickness of the third sintered powder is one-third of the depth of the preset filter hole (4) to form the third filter layer (53). S6. The support member (3) filled with the first filter layer (51), the second filter layer (52) and the third filter layer (53) in the filter hole (4) is placed in a vacuum sintering furnace for sintering. The vacuum pressure is 0.01Pa-1.0Pa, the sintering temperature is 1050-1350℃, and the heat is maintained for 1-5 hours. S7. After naturally cooling to 900℃, the furnace is cooled by air under the protection of inert argon gas and then removed from the furnace. Steps S1 to S6 are repeated to produce multiple filter components (1), and the filtration accuracy ranges do not overlap. The sintered powder is a metal sintered powder. S8. After cooling, the support member (3) is processed again by the processing equipment to form mounting grooves (31) on the top and bottom surfaces of the support member (3), and then a connecting hole (32) is processed on the bottom of the support member (3). S9. Select multiple filter components (1) and place the fiber sintered felt (6) at the fluid inlet of the filter component (1). Then, based on the maximum mesh number on each filter element (5), sort the filter elements (5) from smallest to largest. Then, connect the filter components (1) through the connecting component (2) to form a semi-finished product. S10. The fiber sintered felt (6) at the fluid inlet of the semi-finished product is fixed by the positioning structure (7).

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