A multi-core filter

Abstract

The utility model relates to a kind of multi-core filters, comprising: base, shell, mounting plate and filter core, base includes main body and first closed protrusion, first liquid passage and second liquid passage are set on main body, mounting plate is connected on the upper end of first closed protrusion, filter core is fixed on mounting plate;First closed protrusion includes integrally arranged first section, second section and connecting section;First section is annular structure with opening in circumferential direction, the lower end of first section and main body is connected respectively with the lower end of mounting plate;Second section side with the two sides of first section opening side wall is connected, and lower end is connected with main body, second section is set inwards relative to first section radial collapse;Connecting section is connected in the upper end of second section, connecting section side with the two sides of first section opening side wall is connected, the upper end of connecting section is connected with the lower end of mounting plate.The filter in the utility model can enlarge the slurry interface of filter, also will not increase the volume of filtration, and also can guarantee the installation space of internal filter core.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a multi-core filter. Background Technology

[0002] A typical filter consists of a base, a housing, and a filter element located between the base and the housing. After the fluid enters the filter through the inlet, it is filtered by the filter element inside the filter, and the filtered fluid is discharged from the outlet of the filter.

[0003] To improve filter efficiency, multiple filter elements can be installed inside the filter. Filtering with multiple elements simultaneously significantly increases efficiency. In this case, the inlet and outlet ports of the filter need to be larger to ensure sufficient flow rate. This is especially important when the filter is used to filter slurries, such as lithium battery slurries. Due to the high solids content and viscosity of these slurries, and their greater flow resistance, a sufficiently large inlet and outlet diameter is crucial to guarantee adequate filter flow.

[0004] However, in order to make the inlet and outlet ports larger, the diameter of the housing is often increased; if the diameter of the housing is not increased and is kept constant, the installation space of the internal filter element is often compressed, which affects the number of filter elements that can be installed. Summary of the Invention

[0005] This invention provides a multi-core filter that can expand the slurry interface of the filter without increasing the filter volume, and can also ensure the installation space of the internal filter element.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-core filter, comprising:

[0008] The base includes a main body and a first enclosed protrusion integrally disposed on the main body;

[0009] The housing is sealed to the main body;

[0010] The mounting plate is sealed and fixedly connected to the upper end of the first closed protrusion. A first chamber is formed between the main body, the mounting plate and the first closed protrusion. The mounting plate is provided with a plurality of through holes.

[0011] The filter element is fixed on the mounting plate and has a filtrate chamber that communicates with the first chamber through the through hole. A second chamber is formed between the main body, the outer wall of the first closed protrusion, the outer wall of the filter element, and the inner wall of the housing. The fluid in the filtrate chamber and the second chamber can communicate through the side wall of the filter element and be filtered by the side wall of the filter element.

[0012] The first liquid passage is provided on the main body and is connected to the first chamber;

[0013] The second liquid passage is provided on the main body and is connected to the second chamber;

[0014] The first closed protrusion includes an integrally formed first segment, a second segment, and a connecting segment;

[0015] The first segment is a ring structure with an opening in the circumferential direction. The upper and lower ends of the first segment are respectively sealed and fixedly connected to the lower end of the mounting plate and the main body. The second liquid passage hole is located between the two side walls at the opening.

[0016] The second segment is sealed and fixedly connected to the two side walls of the opening, and its lower end is sealed and fixedly connected to the main body. The second segment is radially recessed inward relative to the first segment.

[0017] The connecting section is sealed and fixedly connected to the upper end of the second section, the periphery of the connecting section is sealed and fixedly connected to the two side walls of the opening, and the upper end of the connecting section is sealed and fixedly connected to the lower end of the mounting plate.

[0018] Let the plane perpendicular to the central axis of the base be the reference plane. In the orthographic projection of the reference plane, the projection of the connection between the connecting section and the mounting plate is located outside the projection of the second section; and the projection of the outer wall of the second section coincides with the projection of the inner wall of the second liquid passage hole, or is located outside the projection of the inner wall of the second liquid passage hole.

[0019] The multi-core filter of this invention uses a first liquid inlet and a second liquid inlet to allow liquid to enter and exit the filter. The first liquid inlet is connected to a first chamber that communicates with multiple filter elements. The first chamber is connected to the filtrate chambers within the multiple filter elements through through holes. The diameter of the first chamber is relatively large, thus allowing the first liquid inlet to be set sufficiently large. The second liquid inlet needs to be located outside the first chamber and communicate with it. If the diameter of the second liquid inlet is increased without changing the overall diameter of the filter, the overall diameter of the first chamber will decrease.

[0020] Therefore, by making the second segment radially recessed inward, the radial distance between the outer side of the second segment and the shell is correspondingly increased. This allows for a larger diameter of the second liquid passage located therein, without interfering with the second segment, thus ensuring an increased liquid flow rate in the second liquid passage without reducing the overall diameter of the first chamber. The radially recessed inward refers to the second segment being mostly closer to the central axis than the first segment, based on the central axis of the first chamber or the main body.

[0021] Furthermore, for the mounting plate, the through holes are connected to the first chamber, meaning the through holes need to be located inside the first closed protrusion. If the first closed protrusion is completely recessed inward, it will inevitably lead to a significant impact on the number of through holes on the mounting plate, which in turn will affect the number of filter elements that can be installed on the mounting plate. In order to reduce or avoid the impact of the second section's inward recess on the number of filter elements that can be installed on the mounting plate.

[0022] A connecting section is further provided between the mounting plate and the first section. In this case, the range of through holes on the mounting plate is limited by the first section and the connecting section. Simultaneously, the projection of the connection point between the connecting section and the mounting plate is located outside the projection of the second section. This allows for a larger area on the mounting plate where through holes can be installed, thus reducing or avoiding the impact of the inward retraction of the second section on the number of through holes on the mounting plate, and consequently reducing or avoiding the impact of the inward retraction of the second section on the number of filter elements that can be installed on the mounting plate. In other words, through the aforementioned design of the second section and the connecting section, it is possible to set a larger diameter for the second liquid passage to ensure the flow rate of the second liquid passage, while avoiding the significant impact of a larger second liquid passage on the number of filter elements that can be installed.

[0023] Preferably, the connecting segment located above the second segment is radially recessed to form a notch on the outer wall of the connecting segment.

[0024] This design reduces the radial distance between the top of the connecting section and the vertical sidewall of the second section, thereby preventing the lever arm of the force acting on the top of the connecting section from being too large. This would cause the connecting section to easily deform with the connection point with the second section as the fulcrum due to the force of the filter element and the liquid, and would also make the connection between the connecting section and the mounting plate prone to gaps and cracks, thus affecting the sealing performance between the connecting section and the mounting plate.

[0025] Preferably, the second liquid passage is a feed inlet, and the first sealing protrusion has an extension that extends radially outward from the outside of the connecting section and is opposite to the notch.

[0026] This design allows the extension to close the gap, ensuring that when the slurry enters from the second liquid passage, it first impacts the extension, preventing direct impact on the mounting plate. This avoids the mounting plate deforming upwards and causing cracks or separation at the connection between the mounting plate and the first sealing protrusion, which in turn affects the sealing effect between the mounting plate and the first sealing protrusion.

[0027] Preferably, the mounting plate includes a welded portion surrounding the through hole and is welded to the filter element via the welded portion, wherein the welded portion is radially protruding from the first closed protrusion;

[0028] The two adjacent welded parts are located on both sides of the central axis of the second liquid passage, and a reinforcing part is provided between the two adjacent welded parts to fix them together.

[0029] With this configuration, when the slurry enters through the second liquid passage, the flow rate of the slurry is relatively large due to the proximity of the two welded parts to the second liquid passage. Consequently, the impact force of the slurry on the lower ends of the two welded parts is relatively large, which may cause the fixed connection between the mounting plate and the first closed protrusion to easily detach. The reinforcement can connect these adjacent welded parts, thereby improving the structural strength, dispersing the impact force of the slurry on the welded parts, and ensuring the structural strength.

[0030] Preferably, the reinforcing part is a plate-like structure, and has openings or slots.

[0031] With this configuration, under the premise of dispersing the impact force of the slurry on the welding part through the aforementioned reinforcement, the area of ​​the reinforcement part can be reduced, thereby reducing the impact force of the slurry on the reinforcement part itself and avoiding the occurrence of cracks at the fixed connection between the mounting plate and the first closed protrusion due to excessive impact force of the slurry on the reinforcement part itself.

[0032] Preferably, on the orthographic projection of the reference plane, the projection of the outer wall of the second segment coincides with the projection of the inner wall of the second liquid passage, and the second segment forms a connecting part in the circumferential direction, through which the second liquid passage can communicate with the second chamber.

[0033] This design ensures that the liquid from the second liquid passage first enters the connecting part and then enters the second chamber through the connecting part. It also avoids abrupt structural changes between the outer wall of the second section and the second liquid passage, which could affect the flow of the liquid or create dead zones.

[0034] Preferably, a first check valve and a second check valve are respectively fitted into the first liquid passage and the second liquid passage;

[0035] The first one-way valve includes a first stop plate slidably connected inside the first liquid passage and a first spring cooperating with the first stop plate. An annular protrusion is provided inside the first liquid passage to restrict the downward movement of the first stop plate.

[0036] The second one-way valve includes a second stop plate that is slidably connected inside the second liquid passage and a second spring that cooperates with the second stop plate. An annular elastic element is provided inside the second liquid passage to restrict the downward movement of the second stop plate. Multiple ribs are provided at the connecting part. The ribs cooperate with the outer wall of the second section to radially limit the second stop plate when it slides to the upper side of the second liquid passage.

[0037] This configuration, through the first and second one-way valves, prevents residual liquid from flowing out of the first and second liquid inlets when the filter stops filtering slurry. Furthermore, the alignment of the projection of the second outer wall segment with the projection of the inner wall of the second liquid inlet allows the second stop plate to slide smoothly onto the upper side of the second liquid inlet. At this point, the second stop plate is restrained by the ribs and the second outer wall segment, preventing radial movement of the second stop plate.

[0038] Preferably, the first closed protrusion has a horizontal support surface opposite to the second liquid passage, the support surface being disposed in contact with the end of the second spring, and in the orthographic projection of the reference plane, the projection of the support surface at least partially covers the projection of the connecting segment.

[0039] This design allows for a sufficiently large supporting surface to support the spring, enabling the use of a larger spring with a larger diameter. This makes the spring less prone to bending during axial deformation. It is understood that the aforementioned supporting surface is actually composed of the bottom wall of the connecting section and the bottom wall of the extension section.

[0040] Preferably, one end of the second spring is connected to a hook, and the other end is fixedly connected to the second stop plate. The hook extends from the outside of the extension to the upper side of the extension, and the hook and the extension cooperate to axially limit one end of the second spring.

[0041] This design allows the hook to limit the spring, preventing it and the stop plate from falling out of the second fluid passage during use.

[0042] Preferably, the upper sidewall of the extension is inclined downward in the direction of the center of the main body, or the upper sidewall of the extension is horizontal.

[0043] And / or, the hook includes an insertion part and a connecting part, the upper end of the connecting part is connected to the insertion part, the lower end is connected to the upper end of the second spring, the insertion part is in contact with the upper sidewall of the extension part, wherein the projected length of the insertion part on the reference plane is greater than half of the outer diameter of the second spring.

[0044] This design ensures that the hook is stably attached to the upper side wall of the extension and that the hook is not easily detached from the extension, thus preventing the hook from falling off.

[0045] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0046] By making the second section recessed inward, the radial distance between the second section and the housing can be increased accordingly, which in turn can make the second liquid passage larger, thus ensuring that a larger flow rate can pass through the second liquid passage of the filter without increasing the overall volume of the filter. At the same time, the connecting section is provided, and the projection of the connection between the connecting section and the mounting plate is located outside the projection of the second section, so as to avoid the situation where the number of filter elements installed on the mounting plate is greatly affected due to the inward recess of the second section. Attached Figure Description

[0047] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific 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 from these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the overall front sectional structure of the filter in an embodiment of this utility model;

[0049] Figure 2 This is a schematic diagram of the overall front sectional view of the base in an embodiment of this utility model;

[0050] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the filter in an embodiment of this utility model;

[0051] Figure 4 This is a three-dimensional structural diagram of the base from one perspective in an embodiment of this utility model;

[0052] Figure 5 This is a three-dimensional structural schematic diagram of the base from another perspective in an embodiment of this utility model;

[0053] Figure 6 This is a cross-sectional perspective view of the base in an embodiment of this utility model.

[0054] Figure 7 This is a schematic diagram of the structure after removing the shell in an embodiment of this utility model;

[0055] Figure 8 This is a schematic diagram of the connection structure between the base and the mounting plate in an embodiment of this utility model;

[0056] Figure 9 This is a bottom view of the mounting plate structure in an embodiment of the present invention;

[0057] Figure 10 This is a schematic diagram of the second spring structure in an embodiment of the present invention.

[0058] Explanation of reference numerals in the attached figures:

[0059] 1. Base; 11. Main body; 12. First closed protrusion; 121. First section; 122. Second section; 123. Connecting section; 124. Extension; 125. Support surface; 13. First liquid passage hole; 14. Second liquid passage hole; 15. Guide plate; 2. Housing; 3. Mounting plate; 31. Second closed protrusion; 32. Through hole; 33. Welded part; 34. Reinforcing part; 35. Opening; 4. Filter element; 41. Filtration chamber; 5. First chamber; 6. Second chamber; 7. Rib; 8. First one-way valve; 81. First stop plate; 82. First spring; 9. Second one-way valve; 91. Second stop plate; 92. Second spring; 921. Hook; 9211. Insertion part; 9212. Connecting part. Detailed Implementation

[0060] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0061] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "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, and 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 of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0063] like Figures 1-3 As shown, Embodiment 1 of this utility model provides a multi-core filter, specifically including a base 1, a housing 2, a mounting plate 3, and a filter element 4.

[0064] The housing 2 is sealed and fixedly connected to the base 1, and the mounting plate 3, filter element 4 and other structures are all set in the cavity formed between the housing 2 and the base 1. The housing 2 and the base 1 can be connected by welding; or the housing 2 and the base 1 can be connected by a flange or other structure, and the housing 2 and the base 1 can be sealed by a sealing ring.

[0065] Reference Figure 2 , Figure 4 as well as Figure 5 The base 1 includes a main body 11 and a first closed protrusion 12 integrally disposed within the main body 11. The first closed protrusion 12 has an annular structure. The mounting plate 3 is sealed to the upper end of the first closed protrusion 12, thereby forming a first chamber 5 between the main body 11, the mounting plate 3 and the first closed protrusion 12.

[0066] Reference Figure 1 , Figure 7 , Figure 8 as well as Figure 9 The mounting plate 3 has multiple through holes 32 communicating with the first chamber 5. There are multiple filter elements 4, and multiple filter elements 4 are fixedly mounted on the mounting plate 3. The filter element 4 has a filtrate chamber 41 inside, and the filtrate chamber 41 is connected to the first chamber 5 through the through holes 32.

[0067] Reference Figure 1 The second chamber 6 is formed between the outer wall of the main body 11, the outer wall of the first closed protrusion 12, the outer wall of the filter element 4, and the inner wall of the shell 2.

[0068] The main body 11 is provided with a first liquid passage 13 and a second liquid passage 14. The first liquid passage 13 is connected to the first chamber 5, and the second liquid passage 14 is connected to the second chamber 6.

[0069] Of the two liquid passages, the first liquid passage 13 and the second liquid passage 14, one is used for liquid inlet and the other for liquid outlet. If the first liquid passage 13 is used as the liquid inlet and the second liquid passage 14 is used as the liquid outlet, the liquid flow sequence is: first liquid passage 13 - first chamber 5 - through hole 32 - filtration chamber 41 of filter element 4 - after filtration by filter element 4, enters the second chamber 6 - liquid exits through the second liquid passage 14. If the second liquid passage 14 is used as the liquid inlet and the first liquid passage 13 is used as the liquid outlet, the liquid flow sequence is: second liquid passage 14 - second chamber 6 - after filtration by filter element 4, enters the filtration chamber 41 - through hole 32 - first chamber 5 - first liquid passage 13.

[0070] To more clearly describe the technical features of this filter and the relationships between them, the filter is placed vertically here, that is, as shown... Figure 1As shown, the base 1 is at the bottom and the outer shell is at the top to define the vertical direction. For example, the side wall of the base 1 away from the shell 2 is the lower side wall, and the first liquid passage hole 13 and the second liquid passage hole 14 are provided on the lower side wall.

[0071] To further ensure the filtration flow rate of the filter, the diameter of the filter's inlet and outlet needs to be large enough. In this filter, the first liquid passage 13 is connected to the first chamber 5, and the first chamber 5 is connected to multiple filter elements 4. The diameter of the first chamber 5 itself is relatively large, so the diameter of the first liquid passage 13 can be set relatively large without affecting the volume of the filter.

[0072] However, for the second liquid passage 14, since the second liquid passage 14 is connected to the second chamber 6 but not to the first chamber 5, the second liquid passage 14 is closer to the outside than the first liquid passage 13. If the second liquid passage 14 is directly enlarged, it is often necessary to increase the diameter of the main body 11 or relatively reduce the diameter of the second chamber 6 to ensure that there is enough space on the main body 11 to set the second liquid passage 14.

[0073] To solve the above problems, the first closed protrusion 12 is divided into three parts, as follows: Figures 4-5 As shown, it specifically includes a first section 121, a second section 122 and a connecting section 123 that are integrally formed. The upper and lower ends of the first section 121 are respectively sealed and fixedly connected to the lower side wall of the mounting plate 3 and the inner bottom surface of the main body 11. The first section 121 is an annular structure with an opening in the circumferential direction, and the second liquid passage hole 14 is located between the two side walls at the opening of the first section 121.

[0074] The second segment 122 is sealed and fixedly connected to the two side walls of the opening of the first segment 121, and its lower end is sealed and fixedly connected to the inner bottom side wall of the main body 11, as shown in the figure. Figure 2 as well as Figure 4 Furthermore, the second segment 122 is radially recessed inward relative to the first segment 121. This radial inward recess means that, with the central axis of the first chamber 5 or the central axis of the main body 11 as a reference, the second segment 122 is closer to the central axis than the first segment 121. Preferably, the second segment 122 is configured as an arc-shaped sidewall; of course, the arc-shaped sidewall can be a regular arc or an irregular arc.

[0075] Because the second segment 122 is radially recessed inward, the second liquid passage 14 on the main body 11 can be made larger, while ensuring that the second segment 122 does not interfere with the second liquid passage 14. This ensures that the second liquid passage 14 can have a larger flow rate without making the diameter of the base 1 larger and causing the filter to have a larger volume.

[0076] Meanwhile, in order to avoid the radial inward shrinkage of the second segment 122 affecting the number of through holes 32 that can be set on the mounting plate 3, a connecting segment 123 can be further sealed and fixedly connected to the upper end of the second segment 122. The two side walls of the connecting segment 123 are sealed and fixedly connected to the two side walls of the opening of the first segment 121, and the top end of the connecting segment 123 is connected to the mounting plate 3.

[0077] Using the plane perpendicular to the central axis of the base 1 as the reference plane, in the projection of the reference plane, the projection of the connection point between the connecting section 123 and the mounting plate 3 is located outside the projection of the second section 122 on the reference plane. Thus, even if the second section 122 is radially recessed, it can still be sealed to the original mounting plate 3 through the connecting section 123, thereby ensuring the installation area of ​​the mounting plate 3 and further ensuring that the number of filter elements 4 installed will not be affected or will be reduced, thus ensuring the filtration efficiency.

[0078] At the same time, the projection of the outer wall of the second segment 122 coincides with the projection of the inner wall of the second liquid passage 14, or the projection of the outer wall of the second segment 122 is located outside the projection of the inner wall of the second liquid passage 14, thereby ensuring that the second segment 122 will not interfere with the second liquid passage 14 and affect the flow rate of the second liquid passage 14.

[0079] like Figure 2 as well as Figure 6 As shown, the bottom end of the connecting segment 123 is connected to the second segment 122, and the top end is connected to the mounting plate 3. The top end of the connecting segment 123 is located outside the second segment 122. This ensures that the lateral area formed by the top end of the connecting segment 123 and the top end of the first segment 121 is larger than the lateral area formed by the first segment 121 and the second segment 122. In other words, the mounting plate 3 has a larger area for setting the through hole 32, thus reducing or avoiding the impact of the inward retraction of the second segment 122 on the number of filter elements 4 installed on the mounting plate 3. In this structure, the through hole 32 in the mounting plate 3 can be set at a position opposite to the second segment 122. The connecting segment 123 ensures a certain gap between the bottom end of the through hole 32 and the first segment 122, allowing the liquid to pass through smoothly.

[0080] It should be noted that the term "outer side" in the entire text of this utility model refers to the radial outer side. More specifically, with the central axis of the base as the center, in the radial direction of the base, the side closer to the central axis of the base is the inner side, and the side farther from the central axis of the base is the outer side.

[0081] In the aforementioned structure, refer to Figure 4 as well as Figure 5The opening of the first section 121 can be closed by the second section 122 and the connecting section 123, so that the entire outer periphery of the first sealing protrusion 12 is in a closed and sealed state; and the sealing and fixing of the connecting section 123 and the first section 121 with the mounting plate 3 can achieve a closed sealing structure at the connection between the top of the first sealing protrusion 12 and the bottom of the mounting plate 3.

[0082] The first segment 121, the connecting segment 123, and the mounting plate 3 can be connected by welding, as shown in the reference. Figure 9 Furthermore, a second closed protrusion 31 can be provided at the bottom of the mounting plate 3. The second closed protrusion 31 surrounds the through hole 32 and is welded to the first section 121 and the connecting section 123 through the second closed protrusion 31.

[0083] Furthermore, when the weight of the filter element and the force of the slurry are concentrated at the top of the connecting section 123, the connecting section 123 will tend to deform with the connection point with the second section 122 as the fulcrum. If the connecting section 123 is still set in the same circumferential arc as the first section 121, then although the installation area of ​​the mounting plate 3 can be guaranteed, the radial length between the top of the connecting section 123 and the second section 122 will be large. At this time, the lever arm of the force is large, which will make the connecting section 123 prone to deformation. The connecting section 123 will affect the sealing connection with the mounting plate 3, resulting in gaps and affecting the sealing effect between the connecting section 123 and the mounting plate 3.

[0084] Therefore, in order to solve the above problems, such as Figure 4 As shown in Figure 5, the connecting segment 123 is also recessed radially inward, thereby shortening the radial length of the connecting plate 124 between the connecting segment 123 and the second segment 122, thus ensuring the structural stability of the second segment 122 and the connecting segment 123 to a certain extent. Figure 2 As shown in Figure 9, two adjacent through holes 32 on the mounting plate can be further positioned on both sides of the central axis of the second liquid passage hole 14. In this case, by recessing the part of the connecting section 123 located between these two through holes 32 inward, the structural stability can be improved without affecting the number of through holes 32 on the mounting plate 3.

[0085] And as Figure 5 as well as Figure 6As shown, the connecting segment 123 only needs to be recessed inward at its top. Furthermore, the connecting segment 123 does not need to consider interference with the second liquid passage 14. Therefore, in the radial direction, the connecting segment 123 does not need to be located outside the second liquid passage 14; that is, the inward recess distance can be adjusted according to the actual position of the through hole 32. Unlike the second segment 122, which would significantly affect the flow rate if located inside the second liquid passage 14, the connecting segment 123 does not require this feature.

[0086] In one embodiment, the second liquid passage 14 is used as the feed inlet and the first liquid passage 13 is used as the discharge outlet. That is, the flow sequence of the liquid is: the second liquid passage 14 enters the second chamber 6, then enters the filtrate chamber 41 after being filtered by the filter element 4, through the through hole 32, the first chamber 5, and the first liquid passage 13.

[0087] Specifically, because the connecting segment 123 is radially recessed and not designed according to the circumferential arc of the first segment 121, a gap will form on the outer wall of the connecting segment 123. The slurry entering from the second liquid passage 14 will directly impact the mounting plate 3 above along the second liquid passage 14, the second segment 122, and through the gap. Over time, this can easily cause gaps to appear at the sealing connection between the first sealing protrusion 12 and the mounting plate 3 (second sealing protrusion 31). To solve this problem, such as... Figures 4-5 As shown, an extension 124 is provided at the connecting section 123, which extends radially outward and is opposite to the notch, thereby closing the formed notch. This ensures that when the slurry enters from the second liquid passage 14, it will first impact the extension 124, avoiding direct impact on the mounting plate 3, which could lead to cracks or gaps at the weld between the mounting plate 3 and the first closed protrusion 12.

[0088] It should be noted that when the liquid material directly impacts the mounting plate 3, it will exert a force that separates the mounting plate 3 from the first sealing protrusion 12. However, if the liquid material directly impacts the extension 124, the force exerted on the extension 124 will not directly cause the mounting plate 3 to separate from the first sealing protrusion 12. Therefore, the stability of the sealing connection between the mounting plate 3 and the first sealing protrusion 12 can be better guaranteed.

[0089] Furthermore, such as Figures 7-8As shown, the mounting plate 3 includes a welding portion 33 surrounding the through hole 32, and is welded to the filter element 4 via the welding portion 33. The welding portion 33 located at the edge of the mounting plate 3 extends radially outward from the first sealing protrusion 12. Two adjacent welding portions 33 are located directly above the second liquid passage 14 and on either side of the central axis of the second liquid passage 14. Therefore, when slurry enters through the second liquid passage 14, the flow rate is relatively high due to the proximity of these two welding portions 33 to the second liquid passage 14. The impact force of the slurry impacting the lower end of the protruding portion of these two welding portions 33 is relatively large, which may cause the weld between the mounting plate 3 and the first sealing protrusion 12 to easily detach.

[0090] To solve the above problems, such as Figure 9 As shown, a reinforcing part 34 is provided between the two adjacent welded parts 33 to fix and connect them, so as to ensure that the impact force of the slurry on the two adjacent welded parts 33 can be dispersed, so as to ensure the structural strength and thus ensure the stability of the weld between the mounting plate 3 and the first closed protrusion 12.

[0091] Of course, for the other welded parts 33 that are not directly opposite the second liquid passage hole 14, a reinforcing part 34 can also be connected between the protrusions of two adjacent welded parts 33 to strengthen the connection between them.

[0092] Furthermore, the reinforcing part 34 can be a plate-shaped structure, and openings 35 or grooves can be provided on the reinforcing part 34 or on its edge. This can reduce the area of ​​the reinforcing part 34 and prevent the welding joint between the mounting plate 3 and the first closed protrusion 12 from cracking due to excessive impact of the slurry on the reinforcing part 34.

[0093] Specifically, refer to Figure 2 The second segment 122 forms a connecting portion in the circumferential direction, that is, a connecting portion is formed between the outer walls of the second segment 122. Since the second segment 122 is only one segment in the circumferential direction, a notch is provided in the part of the connecting portion near the inner circumferential sidewall of the main body 11. The second liquid passage 14 can communicate with the second chamber 6 through the notch of the connecting portion. In order to make the slurry enter the second chamber 6 more smoothly, in this embodiment, the projection of the outer wall of the second segment 122 and the projection of the inner wall of the second liquid passage 14 are aligned on the orthographic projection of the reference plane. Thus, the inner wall of the second liquid passage 14 and the sidewall of the connecting portion are seamlessly connected, thereby stably guiding the slurry quickly, so that the slurry can enter the second chamber 6 more smoothly, thereby avoiding dead angles caused by abrupt changes at the connection between the second liquid passage 14 and the second segment 122.

[0094] Furthermore, such as Figure 1As shown, a first check valve 8 and a second check valve 9 are respectively fitted into the first liquid passage 13 and the second liquid passage 14. The first check valve 8 and the second check valve 9 are respectively used to seal or open the first liquid passage 13 and the second liquid passage 14 to prevent residual liquid in the filter from flowing out from the first liquid passage 13 and the second liquid passage 14 when the filter stops filtering the slurry.

[0095] The first one-way valve 8 includes a first stop plate 81 and a first spring 82 that cooperates with the first stop plate 81. The first liquid passage 13 is provided with an annular protrusion inside. The annular protrusion can cooperate with the first stop plate 81 to restrict the downward movement of the first stop plate 81. When the two are in contact, the first stop plate 81 can block the first liquid passage 13 to prevent the liquid from flowing out of the first liquid passage 13.

[0096] Multiple guide plates 15 are provided on the inner bottom sidewall of the main body 11, which are spaced apart in the circumferential direction. The multiple guide plates 15 are arranged around the first liquid passage hole 13 in the circumferential direction. The projection of the end sidewall of the guide plate 15 near the first liquid passage hole 13 on the reference plane coincides with the projection of the first liquid passage hole 13 on the reference plane. Thus, under the action of external force, the first stop plate 81 can slide to the top of the first liquid passage hole 13 and slide upward along the sidewall of the guide plate 15 in the first chamber 5, thereby opening the first liquid passage hole 13 and allowing the first liquid passage hole 13 to communicate with the first chamber 5 through the gap between two adjacent guide plates 15.

[0097] The second one-way valve 9 includes a second stop plate 91 and a second spring 92 that cooperates with the second stop plate 91. An annular elastic element is disposed inside the second liquid passage 14. The annular elastic element cooperates with the second stop plate 91 and restricts the downward movement of the second stop plate 91. When the annular elastic element abuts against the second stop plate 91, the second stop plate 91 can block the second liquid passage 14, preventing liquid from flowing out of the second liquid passage 14. Specifically, an annular groove is provided on the inner wall of the second liquid passage 14, and the annular elastic element is disposed inside the annular groove. The annular elastic element can be a ring-shaped rubber ring or similar structure.

[0098] In this embodiment, such as Figure 5 As shown, multiple ribs 7 are provided at the connecting portion, and multiple vertically arranged ribs 7 are provided at the notch of the connecting portion. The ribs 7 cooperate with the outer wall of the second section 122 to radially limit the second stop plate 91 when it slides from the second liquid passage 14 to the upper side of the second liquid passage 14, so that it slides up and down in the connecting portion. At this time, the second liquid passage 14 is connected to the second chamber 6 through the notch of the connecting portion.

[0099] Of course, in the aforementioned structure, the first spring 82 and the first stop plate 81 can also be fixedly connected by means of interference fit, bonding, snap-fit ​​or welding, and the second spring 92 and the second stop plate 91 can also be fixedly connected by means of interference fit, bonding, snap-fit ​​or welding.

[0100] When the filter is in use, the structure that works with the filter includes a pin or similar device that works with the first and second check valves. This allows the first stop plate 81 and the second stop plate 91 to be lifted, ensuring that the first liquid passage 13 and the second liquid passage 14 are connected during use. When the filter is removed, the first check valve 8 and the second check valve 9 automatically close the first liquid passage 13 and the second liquid passage 14 respectively under the action of the first spring 82 and the second spring 92.

[0101] Furthermore, refer to Figure 6 The first closed protrusion 12 has a horizontal support surface 125 opposite to the second liquid passage 14. The support surface 125 is disposed in contact with the end of the second spring 92. In order to enable the second spring 92 to have a larger diameter, the projection of the support surface 125 in the orthographic projection of the reference plane at least partially covers the projection of the top end of the connecting section 123. It can be understood that the support surface 125 covers not only part of the bottom sidewall of the connecting section 123, but also part of the bottom sidewall of the extension 124. The aforementioned structure enables the support surface 125 to have a larger radial diameter. When the spring matching the support surface 125 is used as the second spring 92, it can ensure that the spring has a larger diameter, so that it is less likely to bend when the spring undergoes axial deformation.

[0102] Furthermore, such as Figure 4 As shown, in order to ensure that the second spring 92 is contained within the connecting portion and the second liquid passage 14 and used stably, one end of the second spring 92 is connected to a hook 921, and the other end is fixedly connected to the second stop plate 91. Specifically, the end of the second spring 92 can be interference-fitted into the end of the second stop plate 91, thereby achieving a fixed connection between the two. Moreover, here, the upper end hook 921 of the second spring 92 is hooked at the extension portion 124, that is, the hook 921 extends from the outside of the extension portion 124 to the upper side of the extension portion 124, thereby limiting the second spring 92 and ensuring that when the second stop plate 91 blocks the liquid from flowing out of the second liquid passage 14, the second stop plate 91 and the second spring 92 will not fall out of the second liquid passage 14.

[0103] Furthermore, in order to better limit the hook 921 to the upper sidewall of the extension 124, in this embodiment, the upper sidewall of the extension 124 is inclined downwards towards the center of the main body 11 (refer to the following). Figure 2This design makes the extension 124 radially higher on the outside and lower on the inside, making it less likely for the hook 921 to detach when engaged with it. Alternatively, in another embodiment, the upper sidewall of the extension 124 is horizontal.

[0104] Specifically, such as Figure 10 As shown, the hook 921 includes an insertion part 9211 and a connecting part 9212. The connecting part 9212 is vertically arranged, and its upper end is connected to the insertion part 9211, while its lower end is connected to the upper end of the second spring 92. The insertion part 9211 is located on the upper side wall of the extension part 124 and is in contact with the upper side wall of the extension part 124. Thus, through the cooperation between the extension part 124 and the insertion part 9211, the second spring 92 is limited.

[0105] Furthermore, the projected length of the insertion part 9211 on the reference plane is greater than half of the outer diameter of the second spring 92, ensuring the length of the insertion part 9211 on the upper side wall of the extension part 124, making it more difficult for the hook 921 to disengage from the extension part 124, so as to better limit the second spring 92.

[0106] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A multi-core filter, comprising: The base includes a main body and a first enclosed protrusion integrally disposed on the main body; The housing is sealed to the main body; The mounting plate is sealed and fixedly connected to the upper end of the first closed protrusion. A first chamber is formed between the main body, the mounting plate and the first closed protrusion. The mounting plate is provided with a plurality of through holes. The filter element is fixed on the mounting plate and has a filtrate chamber that communicates with the first chamber through the through hole. A second chamber is formed between the main body, the outer wall of the first closed protrusion, the outer wall of the filter element, and the inner wall of the housing. The fluid in the filtrate chamber and the second chamber can communicate through the side wall of the filter element and be filtered by the side wall of the filter element. The first liquid passage is provided on the main body and is connected to the first chamber; The second liquid passage is provided on the main body and is connected to the second chamber; Its features are, The first closed protrusion includes an integrally formed first segment, a second segment, and a connecting segment; The first segment is a ring structure with an opening in the circumferential direction. The upper and lower ends of the first segment are respectively sealed and fixedly connected to the lower end of the mounting plate and the main body. The second liquid passage hole is located between the two side walls at the opening. The second segment is sealed and fixedly connected to the two side walls of the opening, and its lower end is sealed and fixedly connected to the main body. The second segment is radially recessed inward relative to the first segment. The connecting section is sealed and fixedly connected to the upper end of the second section, the periphery of the connecting section is sealed and fixedly connected to the two side walls of the opening, and the upper end of the connecting section is sealed and fixedly connected to the lower end of the mounting plate. Let the plane perpendicular to the central axis of the base be the reference plane. In the orthographic projection of the reference plane, the projection of the connection between the connecting section and the mounting plate is located outside the projection of the second section; and the projection of the outer wall of the second section coincides with the projection of the inner wall of the second liquid passage hole, or is located outside the projection of the inner wall of the second liquid passage hole.

2. The multi-core filter according to claim 1, characterized in that, The connecting segment located above the second segment is radially recessed to form a notch on the outer wall of the connecting segment.

3. The multi-core filter according to claim 2, characterized in that, The second liquid passage is a feed inlet, and the first closed protrusion has an extension that extends radially outward from the outside of the connecting section and is opposite to the notch.

4. The multi-core filter according to claim 3, characterized in that, The mounting plate includes a welded portion surrounding the through hole and is welded to the filter element via the welded portion, wherein the welded portion is radially protruding from the first closed protrusion; The two adjacent welded portions are located on both sides of the central axis of the second liquid passage, and a reinforcing portion is provided between the two adjacent welded portions to fix and connect them.

5. The multi-core filter according to claim 4, characterized in that, The reinforcing part is a plate-like structure, and openings or slots are provided on the reinforcing part.

6. The multi-core filter according to claim 3, characterized in that, On the orthographic projection of the reference plane, the projection of the outer wall of the second segment coincides with the projection of the inner wall of the second liquid passage. The second segment forms a connecting part in the circumferential direction, and the second liquid passage can communicate with the second chamber through the connecting part.

7. The multi-core filter according to claim 6, characterized in that, A first check valve and a second check valve are respectively fitted into the first liquid passage and the second liquid passage. The first one-way valve includes a first stop plate slidably connected inside the first liquid passage and a first spring cooperating with the first stop plate. An annular protrusion is provided inside the first liquid passage to restrict the downward movement of the first stop plate. The second one-way valve includes a second stop plate slidably connected inside the second liquid passage and a second spring cooperating with the second stop plate. An annular elastic element is provided inside the second liquid passage to restrict the downward movement of the second stop plate. Multiple ribs are provided at the connecting part. The ribs cooperate with the outer wall of the second section to radially limit the second stop plate when it slides to the upper side of the second liquid passage.

8. The multi-core filter according to claim 7, characterized in that, The first closed protrusion has a horizontal support surface opposite to the second liquid passage, the support surface being disposed in contact with the end of the second spring, and in the orthographic projection of the reference plane, the projection of the support surface at least partially covers the projection of the connecting segment.

9. The multi-core filter according to claim 7, characterized in that, One end of the second spring is connected to a hook, and the other end is fixedly connected to the second stop plate. The hook extends from the outside of the extension to the upper side of the extension, and the hook and the extension cooperate to axially limit one end of the second spring.

10. The multi-core filter according to claim 9, characterized in that, The upper sidewall of the extension is inclined downward toward the center of the main body, or the upper sidewall of the extension is horizontal. And / or, the hook includes an insertion part and a connecting part, the upper end of the connecting part is connected to the insertion part, the lower end is connected to the upper end of the second spring, the insertion part is in contact with the upper sidewall of the extension part, wherein the projected length of the insertion part on the reference plane is greater than half of the outer diameter of the second spring.

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