In-line filter for ease of processing

Abstract

The utility model relates to filter technical field discloses convenient to process's on -line filter, including shell and inner shell, is provided with polytetrafluoroethylene ring between shell and inner shell inside, and the circumferential outer surface of polytetrafluoroethylene ring is compatible with the inner wall of shell, and the inner side of polytetrafluoroethylene ring is provided with the taper surface, and the side of polytetrafluoroethylene ring is away from the inner shell is provided with filter disc, and the inner wall of shell is compatible with filter disc, and filter disc is convenient for with polytetrafluoroethylene ring contact, and the inner wall of shell is provided with the flow guide vane between filter disc, the utility model, realized through the traditional PEEK material replacement for polytetrafluoroethylene and design into taper surface structure, cooperate the multidirectional stress action of inner shell taper extrusion surface, and the sealing reliability has been improved greatly, solved the problem that traditional sealing is easy to leak completely, and the deformation compensation ability of polytetrafluoroethylene lets filter disc installation position not to need high accuracy processing, and the production difficulty and cost have been reduced significantly.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to an online filter that is easy to manufacture. Background Technology

[0002] In the field of fluid filtration or transportation equipment, effective filtration and sealing of media are often achieved by using sealing structures in conjunction with filter components. Most of the conventional related components on the market use PEEK ring seals (hereinafter referred to as PEEK rings). Their sealing principle mainly relies on the compression between the upper and lower surfaces of the PEEK ring and the corresponding components to achieve sealing.

[0003] However, this planar compression sealing structure has significant drawbacks: to achieve the desired sealing effect, extremely high tightening force is often required to form an effective sealing surface between the upper and lower surfaces of the PEEK ring. This not only makes operation difficult, but also, during long-term use or frequent disassembly and assembly, excessive tightening force can easily cause deformation and wear of the PEEK ring, further reducing sealing reliability and making it difficult to meet the equipment's requirement for long-term stable sealing. At the same time, the installation method of the filter in conventional components also has technical bottlenecks. The filter is usually assembled inside the sealing ring using a tight fit method. This assembly structure has extremely high requirements for the accuracy of the inner diameter of the sealing ring and the outer diameter of the filter. During the processing, the dimensional tolerances of both must be strictly controlled. Once the dimensional deviation exceeds the allowable range, it will either lead to difficulties in assembling the filter and easy damage, or cause media leakage due to assembly gaps, which will greatly increase the processing difficulty and production cost. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an online filter that is easy to manufacture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An easy-to-manufacture online filter includes an outer shell and an inner shell. A polytetrafluoroethylene (PTFE) conical ring is disposed between the inner sides of the outer shell and the inner shell. The outer circumference of the PTFE conical ring is adapted to the inner wall of the outer shell, and a conical surface is formed on the inner side of the PTFE conical ring. A filter element is disposed on the side of the PTFE conical ring away from the inner shell. The filter element is adapted to the inner wall of the outer shell and facilitates contact between the filter element and the PTFE conical ring. A flow guide plate is disposed between the filter element and the inner wall of the outer shell.

[0007] Preferably, a flow guide groove is formed between the inner shell and the filter sheet, and the polytetrafluoroethylene cone ring is located outside the flow guide groove.

[0008] Preferably, a threaded groove is provided on the inner side of the outer shell near the inner shell, and a threaded interface that matches the threaded groove is provided on the outer circumference of the inner shell.

[0009] Preferably, the inner shell has a tapered extrusion surface at one end edge inside the outer shell, and the tapered extrusion surface is adapted to the tapered surface. Since the two tapered surfaces are perfectly adapted, the extrusion force is evenly transmitted to the entire PTFE tapered ring along the inclined surface, causing the PTFE tapered ring to undergo appropriate deformation in both the radial and axial directions. The radial deformation allows the outer circumferential surface of the PTFE tapered ring to fit more tightly with the inner wall of the outer shell, while the axial deformation can enhance the contact pressure between the PTFE tapered ring and the filter element, ultimately forming a multi-dimensional sealing effect of "radial + axial", preventing the problem of fluid leakage from gaps without filtration, and ensuring filtration accuracy and safety in use.

[0010] Preferably, both the outer shell and the inner shell have connecting holes in their middle portions, and both the outer shell and the inner shell have screw holes in their outer middle portions.

[0011] Preferably, the guide plate has multiple strip-shaped slots, and these slots converge in the middle of the guide plate. When the fluid enters the guide plate area after being filtered by the filter, it is dispersed into different slots, preventing the fluid from accumulating on the surface of the guide plate and forming eddies. This effectively solves the problem of uneven local flow velocity and reduces fluid flow resistance. On the other hand, the structure of the slots converging towards the center can guide the fluid dispersed in each slot to converge back to the middle of the guide plate, and then flow out smoothly through the connecting holes of the inner or outer shell. This ensures the stability of fluid discharge and minimizes the amount of fluid remaining in the guide plate area, reducing the risk of impurity deposition due to fluid residue.

[0012] The beneficial effects of this utility model are as follows:

[0013] By employing technologies such as an outer shell, inner shell, PTFE conical ring, filter element, flow guide plate, and flow guide groove, the conical extrusion surface on the inner side of the inner shell compresses the PTFE conical ring, ensuring stress on both the top and bottom and the ring surface, resulting in better sealing. This eliminates the need for high-precision dimensions, making machining easier and effectively solving the problems mentioned in the background technology. Furthermore, by replacing traditional PEEK material with PTFE and designing a conical structure, combined with the multi-directional stress effect of the conical extrusion surface of the inner shell, sealing reliability is significantly improved, completely solving the problem of easy leakage in traditional seals. Simultaneously, the deformation compensation capability of PTFE eliminates the need for high-precision machining of the filter element installation position, significantly reducing production difficulty and cost. It also avoids uneven filtration and flow blockage caused by fluid impact, and eliminates the need for additional cavity space, effectively controlling the overall size of the filter. This makes it more suitable for online installation scenarios, balancing flow stability and equipment miniaturization requirements, comprehensively enhancing the product's practical value and market competitiveness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of existing online filters on the market;

[0015] Figure 2This is a schematic diagram showing the disassembled structure of the easy-to-manufacture online filter proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the easy-to-manufacture online filter inner shell proposed in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the easy-to-manufacture online filter polytetrafluoroethylene cone ring proposed in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the easy-to-manufacture online filter guide plate proposed in this utility model;

[0019] Figure 6 This is a cross-sectional view of the easily manufactured online filter proposed in this utility model.

[0020] In the diagram: 1. Outer shell; 2. Inner shell; 201. Conical extrusion surface; 3. PTFE conical ring; 301. Conical surface; 4. Filter plate; 5. Guide plate; 6. Guide groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-6 An easy-to-manufacture online filter includes an outer shell 1 and an inner shell 2. A polytetrafluoroethylene (PTFE) conical ring 3 is disposed between the inner sides of the outer shell 1 and the inner shell 2. The outer circumference of the PTFE conical ring 3 is adapted to the inner wall of the outer shell 1, and a conical surface 301 is formed on the inner side of the PTFE conical ring 3. A filter element 4 is disposed on the side of the PTFE conical ring 3 away from the inner shell 2. The filter element 4 is adapted to the inner wall of the outer shell 1, and the filter element 4 is easy to contact with the PTFE conical ring 3. A flow guide 5 is disposed between the filter element 4 and the inner wall of the outer shell 1. The outer diameter of the filter element 4 is adapted to the size of the inner wall of the outer shell 1, which can not only ensure the stable placement of the filter element 4 in the shell, but also ensure that its edge is in close contact with the end face of the PTFE conical ring 3, preventing the fluid from bypassing the filter element 4 through the gap between the two and causing filtration failure. In addition, to optimize the fluid flow path, a flow guide 5 is additionally disposed between the filter element 4 and the inner wall of the outer shell 1. The structure of the flow guide 5 guides the fluid to enter the filtration stage more orderly, further improving the filtration efficiency.

[0023] In this invention, a flow guide groove 6 is formed between the inner shell 2 and the filter element 4, and the polytetrafluoroethylene (PTFE) conical ring 3 is located outside the flow guide groove 6. The PTFE conical ring 3 can provide a certain degree of protection to the flow guide groove 6 by its own structure, preventing external impurities from entering the groove and blocking the channel. At the same time, the sealing characteristics of the conical ring can ensure that the fluid in the flow guide groove 6 can only flow to the filter element 4 along the preset path, without fluid leakage or diversion, thus laying the foundation for the stable operation of the subsequent filtration process.

[0024] In this invention, a threaded groove is provided on the inner side of the outer shell 1 near the inner shell 2, and a threaded interface that matches the threaded groove is provided on the outer circumference of the inner shell 2. This threaded connection method is not only easy to operate, but also allows the operator to complete the assembly or disassembly simply by rotating the inner shell 2, which facilitates the maintenance of the filter and the replacement of the filter element. At the same time, the tightness of the threaded fit can initially improve the sealing effect between the outer shell 1 and the inner shell 2, preventing fluid leakage from the connection gap between the two. In addition, the threaded connection can also provide a stable force transmission basis for the subsequent extrusion action of the inner shell 2 on the polytetrafluoroethylene cone ring 3, ensuring that no component displacement occurs during the extrusion sealing.

[0025] In this invention, the inner shell 2 has a tapered extrusion surface 201 at one end edge inside the outer shell 1, and the tapered extrusion surface 201 is adapted to the tapered surface 301. When the outer shell 1 and the inner shell 2 are tightened by threaded connection, the inner shell 2 will gradually push into the inner shell 1. At this time, the tapered extrusion surface 201 of the inner shell 2 will form a tight extrusion fit with the tapered surface 301 of the polytetrafluoroethylene tapered ring 3. As the thread is tightened continuously, the extrusion force will be evenly transmitted to the polytetrafluoroethylene tapered ring 3 along the tapered surface 301, so that the polytetrafluoroethylene tapered ring 3 will undergo appropriate deformation in both the radial and axial directions. As a result, the fit between its outer circumferential surface and the inner wall of the outer shell 1, and the end face and the filter sheet 4 are greatly improved, and finally a multi-dimensional reliable seal is formed, eliminating the problem of fluid leakage from the gap without filtration.

[0026] In this utility model, both the outer shell 1 and the inner shell 2 have connecting holes in the middle, and both the outer shell 1 and the inner shell 2 have screw holes in the middle of their outer sides.

[0027] In this invention, the guide plate 5 has multiple strip-shaped slots, all of which converge in the middle of the guide plate 5. On the one hand, the multiple strip-shaped slots can divert and guide the fluid. After the fluid passes through the filter plate 4, it enters the area of ​​the guide plate 5. At this time, the fluid can be evenly dispersed and flowed through different strip-shaped slots, avoiding uneven flow rate caused by local fluid accumulation. On the other hand, the structure of the strip-shaped slots converging towards the middle can guide the dispersed fluid to converge back to the middle of the guide plate 5 and then flow out through the connection hole of the outer shell 1. This not only ensures the smooth discharge of the fluid but also reduces the amount of fluid stagnation in the area of ​​the guide plate 5, reducing the risk of impurity deposition caused by fluid residue. At the same time, the design of the strip-shaped slots also facilitates the cleaning and maintenance of the guide plate 5 in the later stages.

[0028] Working Principle: The fluid first enters the filter and, guided by the flow groove 6 inside the PTFE cone ring 3 on the left side of the filter element 4, flows orderly towards the filter element 4. The filter element 4, as the core filtration component, intercepts impurities in the fluid, completing the initial filtration. The filtered fluid then undergoes flow direction adjustment via the flow guide plate 5 on the right side of the filter element 4. The design of the flow guide plate 5 ensures smooth fluid flow while avoiding flow blockage caused by fluid stagnation, and effectively controls the overall size of the filter, achieving the dual effect of "small size + anti-blockage." The filter uses PTFE... The conical structure design, which replaces the original PEEK material, achieves its core sealing logic through "multi-directional force": when the conical extrusion surface 201 on the inner shell 2 is pressed together with the PTFE conical ring 3, it will drive the PTFE conical ring 3 to generate force in both the vertical and circumferential directions, forming an all-round sealing effect and preventing fluid leakage. Compared with the traditional sealing structure, the sealing reliability is significantly improved. Since the multi-directional force sealing design of the PTFE conical ring 3 can effectively compensate for dimensional errors, the high-precision dimensional requirements for the placement of the filter element 4 are greatly reduced, and it is not necessary to strictly control the precision machining tolerance of this area to ensure the filter passes the test.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An easy-to-manufacture in-line filter, comprising a housing (1) and an inner housing (2), characterized in that, A polytetrafluoroethylene (PTFE) conical ring (3) is provided between the inner side of the outer shell (1) and the inner shell (2). The outer circumference of the PTFE conical ring (3) is adapted to the inner wall of the outer shell (1), and a conical surface (301) is provided on the inner side of the PTFE conical ring (3). A filter (4) is provided on the side of the PTFE conical ring (3) away from the inner shell (2). The filter (4) is adapted to the inner wall of the outer shell (1). The filter (4) is convenient to contact the PTFE conical ring (3). A guide plate (5) is provided between the filter (4) and the inner wall of the outer shell (1).

2. The easily processed online filter according to claim 1, characterized in that, A flow channel (6) is formed between the inner shell (2) and the filter (4), and the polytetrafluoroethylene cone ring (3) is located outside the flow channel (6).

3. The easily processed online filter according to claim 1, characterized in that, The outer shell (1) has a threaded groove at one end near the inner shell (2), and the outer circumference of the inner shell (2) has a threaded interface that matches the threaded groove.

4. The easily processed online filter according to claim 1, characterized in that, The inner shell (2) has a tapered extrusion surface (201) at one end edge inside the outer shell (1), and the tapered extrusion surface (201) is adapted to the tapered surface (301).

5. The easily processed online filter according to claim 1, characterized in that, Both the outer shell (1) and the inner shell (2) have connecting holes in the middle, and both the outer shell (1) and the inner shell (2) have screw holes in the middle of their outer sides.

6. The easily processed online filter according to claim 1, characterized in that, The guide plate (5) has multiple strip-shaped slots, and all the strip-shaped slots converge in the middle of the guide plate (5).

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