A filter bag type resin filter

Abstract

The utility model relates to 3D printing equipment technical field, especially a filter bag type resin filter. The device includes filter body and internal filter screen subassembly, and filter screen subassembly contains at least two buckling structures, gland and filter bag. Buckling structure is arranged along the body inner wall circumferentially symmetrical, is constituted by horizontal extension horizontal direction guide convex strip and end intercommunication vertical limit baffle, and the outer edge of gland is equipped with radial convex clamping stick, and clamping stick can slip along horizontal direction guide convex strip, and after rotating, with vertical limit baffle abutment locking, can press the upper end of filter bag tightly sealed in the body inner wall. The design realizes filter bag quick assembly and disassembly and stable sealing, improves the filtration precision, the leakproofness and the operation convenience, is applicable to resin and other material filtering scene, helps the filtration system efficient stable operation.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing equipment technology, and in particular to a filter bag type resin filter. Background Technology

[0002] In the field of 3D printing, resin filtration is a crucial step in achieving material purification and impurity separation. Its filtration efficiency and precision directly affect the stability of subsequent production processes and product quality. Currently, commonly used resin filters mostly employ filter screens as filtration elements to intercept and separate particulate impurities and suspended solids in the resin.

[0003] However, existing resin filter screen installation and fixing structures have many shortcomings. Some filters use bolts to fix the screen, which is cumbersome to install and remove, requires tools, and is prone to leakage of filtered materials due to bolt wear when the screen is frequently replaced. Other filters use a snap-on fixing structure, but the snaps have poor uniform force distribution, which can cause the screen to loosen under high-pressure filtration conditions, affecting the filtration effect.

[0004] Therefore, how to provide a filter structure that is easy to install and remove, securely fixed, and adaptable to the filtration needs of various resin materials has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model provides a filter bag type resin filter, including a filter body and a filter screen assembly disposed inside the body;

[0006] The filter assembly includes at least two snap-fit ​​structures, a pressure cap that cooperates with the snap-fit ​​structures, and a filter bag. The at least two snap-fit ​​structures are symmetrically arranged circumferentially on the inner wall of the filter body. Each snap-fit ​​structure includes a horizontally extending transverse guide ridge and a vertical limiting baffle that communicates with the end of the transverse guide ridge.

[0007] The outer edge of the cover is provided with a radially protruding locking bar. The locking bar can slide radially along the transverse guide bar and rotate to abut against and lock with the vertical limiting wall, so that the cover presses and seals the upper edge of the filter bag against the inner wall of the filter body.

[0008] In one embodiment, the filter assembly further includes an annular shoulder and a sealing ring; the annular shoulder is disposed on the inner wall of the filter body, and the sealing ring is placed on the annular shoulder, such that the upper edge of the filter bag is embedded between the sealing ring and the pressure cap.

[0009] In one embodiment, at least two filter screen assemblies are disposed axially spaced within the filter body;

[0010] Each filter assembly includes an independently configured annular shoulder, sealing ring, filter bag, fastening structure, and pressure cap.

[0011] In one embodiment, the snap-fit ​​structure of each filter assembly is arranged in a circumferentially staggered manner.

[0012] In one embodiment, the transverse guide protrusion of the fastening structure has a gradually expanding cross section along the rotation locking direction of the locking bar, and the groove width increases linearly from the initial width to the end width with the rotation starting end as the reference point.

[0013] In one embodiment, the filter body is provided with a feed inlet located above the filter screen assembly; the bottom of the filter body is provided with a discharge outlet located below the filter screen assembly, and the discharge outlet is provided with a discharge valve.

[0014] In one embodiment, a drain pipe is connected to the outlet pipe, and a drain valve is provided on the drain pipe. The diameter of the drain pipe is larger than the diameter of the outlet pipe.

[0015] In one embodiment, the filter body is further provided with a filter screen along its inner wall, and the filter screen is made of stainless steel.

[0016] In one embodiment, a pressure pump is also included, which is connected to the inlet for delivering pressure into the filter body.

[0017] In one embodiment, a bracket is also included, on which the filter body and the pressure pump are fixed.

[0018] Compared with existing technologies, the filter bag type resin filter provided by this utility model achieves rapid installation and secure sealing of the filter bag through the cooperation of the fastening structure and the pressure cap. The fastening structure is symmetrically arranged circumferentially, and the radially protruding locking bar on the outer edge of the pressure cap facilitates the engagement. The lateral guide strip provides a precise sliding path for the locking bar, while the vertical limiting baffle ensures the stability of the pressure cap after locking, effectively preventing the filter bag from shifting or loosening due to pressure fluctuations during filtration, thus ensuring filtration accuracy and sealing. Simultaneously, the rotational locking and sliding unlocking method of the pressure cap and fastening structure simplifies the filter bag replacement process, adapting to the need for frequent bag replacements during resin filtration. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the overall structure of the resin filter provided by this utility model;

[0021] Figure 2 A cross-sectional view of Embodiment 1 of the resin filter provided by this utility model;

[0022] Figure 3 A cross-sectional view of Embodiment 2 of the resin filter provided by this utility model;

[0023] Figure 4 Provided by this utility model Figure 2 Enlarged view of point A in the middle;

[0024] Figure 5 This is a top view of the internal structure of the resin filter provided by this utility model;

[0025] Figure 6 This is a schematic diagram of the internal structure of the resin filter provided by this utility model.

[0026] Figure label:

[0027] 10 Filter body, 11 Inlet, 12 Outlet, 13 Discharge valve, 14 Drain pipe, 15 Drain valve, 16 Pressure pump, 17 Pressure regulating valve.

[0028] 20 Filter assembly, 21 Fastening structure, 22 Pressure cap, 23 Clamping bar, 24 Filter bag, 25 Horizontal guide strip, 26 Vertical limiting baffle, 27 Annular shoulder, 28 Sealing ring, 29 Filter screen.

[0029] 30 brackets, 31 limiting grooves. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] To provide a filter structure that is easy to install and remove, securely fixed, and adaptable to the filtration needs of various resin materials, this utility model provides such a... Figures 1-2 Example 1 and shown Figure 3 The filter bag type resin filter of Example 2 is shown.

[0033] like Figures 1-2 As shown in Embodiment 1, the filter includes a filter body 10 and a filter screen assembly 20 disposed inside the body;

[0034] The filter assembly 20 includes at least two fastening structures 21, a pressure cap 22 that cooperates with the fastening structures 21, and a filter bag 24. The at least two fastening structures 21 are symmetrically arranged circumferentially on the inner wall of the filter body 10. Each fastening structure 21 includes a horizontally extending transverse guide 25 and a vertical limiting baffle 26 that communicates with the end of the transverse guide 25.

[0035] The outer edge of the pressure cap 22 is provided with a radially protruding locking bar 23. The locking bar 23 can slide radially along the transverse guide bar 25 and rotate until it abuts and locks against the vertical limiting wall 26, so that the pressure cap 22 presses and seals the upper edge of the filter bag 24 against the inner wall of the filter body 10.

[0036] In use, first place the filter bag 24 inside the filter body 10, so that the upper edge of the filter bag 24 is aligned with the inner wall of the filter body 10. Then, take the pressure cap 22 and align the radially protruding locking bar 23 on its outer edge with the inlet of the transverse guide protrusion 25 of the fastening structure 21. Slide the locking bar 23 radially along the transverse guide protrusion 25. When the locking bar 23 has slid to the end of the transverse guide protrusion 25, rotate the pressure cap 22 so that the locking bar 23 abuts against the vertical limiting wall 26. Using the weight of the pressure cap 22 itself and the limiting effect of the abutment and locking, the upper edge of the filter bag 24 is tightly pressed against the inner wall of the filter body 10, thus completing the installation of the filter bag 24. During filtration, the material enters the filter body 10, is filtered by the filter bag 24, and then flows out. When the filter bag 24 needs to be replaced, rotate the cover 22 in the opposite direction and slide the locking bar 23 in the opposite direction along the transverse guide ridge 25 to remove the cover 22, take out the old filter bag 24, repeat the above steps to install the new filter bag 24, and resume filtration.

[0037] Furthermore, such as Figure 5 As shown, the filter assembly 20 includes three snap-fit ​​structures 21 and three locking rods 23 that protrude radially from the outer edge of the pressure cap 22.

[0038] like Figure 2 As shown, the filter assembly 20 also includes an annular shoulder 27 and a sealing ring 28; the annular shoulder 27 is disposed on the inner wall of the filter body 10, and the sealing ring 28 is placed on the annular shoulder 27, so that the upper edge of the filter bag 24 is embedded between the sealing ring 28 and the pressure cap 22.

[0039] The filter assembly 20 is equipped with an annular shoulder 27 and a sealing ring 28. The annular shoulder 27 provides stable support and positioning reference for the sealing ring 28, so that the sealing ring 28 can accurately fit the gap between the upper edge of the filter bag 24 and the inner wall of the filter. With the pressing action of the pressure cap 22, the edge of the filter bag 24 can be effectively fixed.

[0040] like Figure 3 As shown in Embodiment 2, at least two layers of filter screen assemblies 20 are arranged axially spaced inside the filter body 10;

[0041] Each filter assembly 20 includes an independently configured annular shoulder 27, sealing ring 28, filter bag 24, fastening structure 21, and pressure cap 22.

[0042] In Example 2, at least two layers of filter screen components 20 are arranged axially inside the filter body 10, and each layer of components is independently configured, which can realize multi-stage filtration of resin materials. By combining filter bags 24 of different precision, the overall filtration effect is improved. At the same time, the independent component design allows the filter bags 24 to be replaced individually for different filtration levels without having to shut down the entire machine to replace all filter bags 24.

[0043] like Figure 3As shown, the fastening structure 21 of each filter assembly 20 is staggered in the circumferential direction, which can avoid mutual interference between the upper and lower fastening structures 21 in the axial space, so that the rotation operation of each layer of pressure cover 22 does not affect each other, and it is convenient to disassemble and maintain a certain layer of filter assembly 20 individually.

[0044] For example, the upper filter bag 24 is 20 mesh and the lower filter bag 24 is 50 mesh. The clamping rods 23 of the upper cover 22 are located at 0°, 120° and 240°, and the clamping rods 23 of the lower cover 22 are offset by 60° and arranged at 60°, 180° and 300°.

[0045] Furthermore, such as Figure 4 As shown, the transverse guide protrusion 25 of the fastening structure 21 has a gradually expanding cross section along the rotation locking direction of the locking bar 23. With the starting end of rotation as the reference point, the groove width increases linearly from the initial width to the end width, which can accommodate locking bars 23 of different diameters.

[0046] Furthermore, such as Figure 1 As shown, the filter body 10 is provided with a feed inlet 11, which is located above the filter screen assembly 20; the bottom of the filter body 10 is provided with a discharge outlet 12, which is located below the filter screen assembly 20, and the discharge outlet 12 is provided with a discharge valve 13.

[0047] Furthermore, a drain pipe 14 is connected to the pipe of the discharge port 12, and a drain valve 15 is provided on the drain pipe 14. The diameter of the drain pipe 14 is larger than the diameter of the discharge pipe.

[0048] In the above scheme, when the device needs cleaning and maintenance or when there is a large demand for resin receiving, the drain valve 15 can be opened, and after cleaning, the water can be drained through the drain pipe 14 or the large amount of receiving demand can be met. When only a small amount of resin receiving demand is needed, the discharge valve 13 can be opened, and the discharge port 12 can be used for receiving.

[0049] Furthermore, such as Figure 2 As shown in Figure 3, the filter body 10 is further provided with a filter screen 29 along its inner wall. The filter screen 29 is made of stainless steel. The addition of the stainless steel filter screen 29 to the inner wall of the filter body 10 can play a secondary interception role when the filter bag 24 is accidentally damaged, forming a double filtration protection.

[0050] Preferably, the filter bag 24 is made of nylon, non-woven fabric or polyester.

[0051] Furthermore, such as Figure 1 As shown, it also includes a pressure pump 16, which is connected to the feed inlet 11 and is used to deliver pressure into the filter body 10.

[0052] Furthermore, such as Figure 1As shown, it also includes a bracket 30, on which the filter body 10 and the pressure pump 16 are fixed.

[0053] Preferred, such as Figure 1 As shown, the pressurizing pump 16 also includes a pressure regulating valve 17. The input end of the pressure regulating valve 17 is connected to the pressurizing pump 16, and the output end is connected to the resin filter container through a hose. The bracket 30 is provided with a limiting groove 31, which can be used to place the hose. The hose structure is a common plastic tube, which is not shown in the figure. Those skilled in the art can install it according to conventional means. This is the prior art and will not be described in detail here.

[0054] Although this document frequently uses terms such as annular shoulder, sealing ring, filter bag, fastening structure, and cap, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A filter bag type resin filter, characterized in that: Includes a filter body (10) and a filter assembly (20) disposed inside the body; The filter assembly (20) includes at least two snap-fit ​​structures (21), a cap (22) that cooperates with the snap-fit ​​structures (21), and a filter bag (24). The at least two snap-fit ​​structures (21) are symmetrically arranged circumferentially on the inner wall of the filter body (10). Each snap-fit ​​structure (21) includes a horizontally extending transverse guide ridge (25) and a vertical limiting baffle (26) that communicates with the end of the transverse guide ridge (25). The outer edge of the pressure cap (22) is provided with a radially protruding locking bar (23). The locking bar (23) can slide radially along the transverse guide bar (25) and rotate to abut against and lock with the vertical limiting wall (26), so that the pressure cap (22) presses and seals the upper edge of the filter bag (24) against the inner wall of the filter body (10).

2. The filter bag type resin filter according to claim 1, characterized in that: The filter assembly (20) also includes an annular shoulder (27) and a sealing ring (28); the annular shoulder (27) is disposed on the inner wall of the filter body (10), and the sealing ring (28) is placed on the annular shoulder (27), so that the upper edge of the filter bag (24) is embedded between the sealing ring (28) and the cap (22).

3. The filter bag type resin filter according to claim 2, characterized in that: At least two layers of filter screen assemblies (20) are provided axially spaced inside the filter body (10). Each filter assembly (20) includes an independently configured annular shoulder (27), sealing ring (28), filter bag (24), fastening structure (21), and pressure cap (22).

4. The filter bag type resin filter according to claim 3, characterized in that: The snap-fit ​​structure (21) of each filter assembly (20) is staggered in the circumferential direction.

5. The filter bag type resin filter according to claim 1, characterized in that: The transverse guide protrusion (25) of the fastening structure (21) has a gradually expanding cross section along the rotation locking direction of the locking bar (23). With the starting end of rotation as the reference point, the groove width increases linearly from the initial width to the end width.

6. The filter bag type resin filter according to claim 1, characterized in that: The filter body (10) is provided with a feed inlet (11), which is located above the filter screen assembly (20); the filter body (10) is provided with a discharge outlet (12) at the bottom, which is located below the filter screen assembly (20), and the discharge outlet (12) is provided with a discharge valve (13).

7. The filter bag type resin filter according to claim 6, characterized in that: The outlet (12) is connected to a drain pipe (14), and the drain pipe (14) is equipped with a drain valve (15). The diameter of the drain pipe (14) is larger than that of the outlet pipe.

8. The filter bag type resin filter according to claim 3, characterized in that: The filter body (10) is further provided with a filter screen (29) along its inner wall, and the filter screen (29) is made of stainless steel.

9. The filter bag type resin filter according to claim 6, characterized in that: It also includes a pressure pump (16) connected to the feed inlet (11) for delivering pressure into the filter body (10).

10. The filter bag type resin filter according to claim 9, characterized in that: It also includes a bracket (30), on which the filter body (10) and the pressure pump (16) are fixed.

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