Filter structure capable of guaranteeing accurate welding positioning

Abstract

The utility model discloses a filter structure capable of ensuring accurate welding positioning, which relates to the technical field of filters and comprises a shell barrel, a filter element assembly is placed in the shell barrel and comprises a filter element opening end cover, at least one filter element body and a filter element closing end cover which are connected in sequence, and the filter element opening end cover is provided with an opening. The opening end of the upper end of the shell cylinder and the filter element opening end cover are fixedly connected with the inlet and outlet end cover; a plurality of outer cover positioning protrusions are arranged on the outer wall of the filter element body, and the ends, away from the filter element body, of the outer cover positioning protrusions can abut against the inner wall of the shell cylinder. An end cover positioning protrusion is arranged at the end, away from the filter element body, of the filter element closed end cover, an end cover positioning groove is formed in the bottom of the shell barrel, and the end cover positioning protrusion can be inserted into the end cover positioning groove. According to the utility model, accurate positioning between the filter element assembly and the shell cylinder can be realized, so that the welding precision and strength are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a filter structure that ensures precise welding positioning. Background Art

[0002] During the final welding of existing filters, the internal filter element needs to be placed inside the outer shell, and the filter element's open end cap, inlet and outlet caps, and outer shell are welded together. However, when the filter element is placed inside the outer shell, because the existing filter element's outer diameter is 4-5mm smaller than the inner diameter of the shell, the filter element may deviate from the center of the outer shell and tilt to one side. As a result, the weld surface of the filter element's open end cap may be misaligned with the weld surface of the inlet and outlet caps. In this case, the weld surface between the two components becomes smaller, resulting in reduced weld strength.

[0003] Therefore, there is an urgent need in the art for a filter structure that can ensure precise welding positioning to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to provide a filter structure that ensures precise welding positioning, so as to solve the problems existing in the above-mentioned prior art, realize the accurate positioning of the welding parts required in the filter, and improve the welding strength.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model discloses a filter structure that ensures precise welding positioning, comprising an outer shell cylinder, a filter element assembly placed in the outer shell cylinder, the filter element assembly comprising a filter element open end cover, at least one filter element body and a filter element closed end cover connected in sequence, the upper open end of the outer shell cylinder and the filter element open end cover are both fixedly connected to the inlet and outlet end covers;

[0007] A plurality of outer cover positioning protrusions are provided on the outer wall of the filter element body, and the end of the outer cover positioning protrusion away from the filter element body can be abutted against the inner wall of the outer shell cylinder; the end of the closed end cover of the filter element away from the filter element body is provided with an end cover positioning protrusion, and the bottom of the outer shell cylinder is provided with an end cover positioning groove, and the end cover positioning protrusion can be inserted into the end cover positioning groove.

[0008] Preferably, the filter element body includes a filter element center rod, a filter element filter membrane is provided on the outside of the filter element center rod, a filter element outer cover is provided on the outside of the filter element filter membrane, and the outer wall of the filter element outer cover is provided with the outer cover positioning protrusion.

[0009] Preferably, four outer cover positioning protrusions are provided on the outer wall of each filter element outer cover, and the four outer cover positioning protrusions are evenly distributed along the circumferential direction of the outer wall of the filter element outer cover.

[0010] Preferably, the length of the outer cover positioning protrusion is half of the difference between the inner diameter of the outer shell cylinder and the outer diameter of the filter element outer cover.

[0011] Preferably, the end cover positioning protrusion is a cross-shaped protrusion, and the end cover positioning groove is a cross-shaped groove.

[0012] Preferably, a tapered portion is provided at the lower end of the outer shell cylinder, and the inner diameter of the tapered portion gradually decreases from top to bottom.

[0013] Preferably, the outer shell, the inlet and outlet end covers and the filter element assembly are all made of PP, HDPE or PFA.

[0014] Preferably, when the filter element assembly includes two or more filter element bodies, two adjacent filter element bodies are connected by a connecting device.

[0015] Preferably, the connecting device includes two filter element connecting plates, and hot-melt protrusions are provided on adjacent surfaces of the two filter element connecting plates, and the hot-melt protrusions on the two filter element connecting plates are connected by hot-melt.

[0016] Preferably, the hot melt protrusion is a circular protrusion, and two hot melt protrusions are provided on each filter element connecting plate.

[0017] Compared with the prior art, the utility model has achieved the following technical effects:

[0018] The utility model provides an outer cover positioning protrusion on the outer wall of the filter element body and an end cap positioning protrusion on the closed end cap of the filter element, thereby effectively achieving the positioning and installation of the filter element assembly, preventing the filter element assembly from shifting inside the outer shell. This ensures that the welding area between the upper open end of the outer shell, the filter element open end cap, and the inlet and outlet end caps is not reduced, thereby ensuring the welding strength of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a filter structure for ensuring precise welding positioning according to an embodiment of the present utility model;

[0021] Figure 2A schematic diagram of the connection between two adjacent filter core bodies in a filter structure that ensures precise welding positioning according to an embodiment of the present invention;

[0022] In the figure: 1-housing cylinder; 101-end cover positioning groove; 2-inlet and outlet end covers; 3-filter element center rod; 4-filter element filter membrane; 5-filter element outer cover; 501-outer cover positioning protrusion; 6-filter element open end cover; 7-filter element closed end cover; 701-end cover positioning protrusion; 8-filter element connecting plate; 9-hot melt protrusion. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The purpose of the present invention is to provide a filter structure that ensures precise welding positioning, so as to solve the problems existing in the above-mentioned prior art, realize the accurate positioning of the welding parts required in the filter, and improve the welding strength.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] like Figure 1-Figure 2 As shown, this embodiment provides a filter structure that ensures precise welding positioning, including an outer shell body 1, which is a cylindrical structure with an open upper end and a closed lower end. A filter element assembly is placed in the outer shell body 1. Figure 1 As can be seen in the figure, the filter element assembly includes a filter element open end cover 6, at least one filter element body, and a filter element closed end cover 7, which are connected in sequence from top to bottom. The upper end of the filter element open end cover 6 is flush with or slightly higher than the upper end opening of the outer shell body 1 by 1-2 mm. When there are two or more filter element bodies, each filter element body is still connected in sequence from top to bottom and is located between the filter element open end cover 6 and the filter element closed end cover 7. The upper open end of the outer shell body 1 and the filter element open end cover 6 are fixedly connected to the inlet and outlet end covers 2 by hot melt.

[0027] In order to ensure the positioning of the filter element assembly in the outer shell 1, a plurality of outer cover positioning protrusions 501 are provided on the outer wall of the filter element body, and the end of the outer cover positioning protrusion 501 away from the filter element body can be abutted against the inner wall of the outer shell 1. Figure 1The lower end of the outer shell cylinder 1 is provided with an end cover positioning protrusion 701, and the bottom of the outer shell cylinder 1 is provided with an end cover positioning groove 101. The shapes and sizes of the end cover positioning protrusion 701 and the end cover positioning groove 101 match, so that the end cover positioning protrusion 701 can be inserted into the end cover positioning groove 101.

[0028] During the actual installation process, it is only necessary to place the filter assembly into the outer shell 1. During the placement process, since the outer wall of the filter element body is provided with outer cover positioning protrusions 501, and the end of each outer cover positioning protrusion 501 away from the filter element body is always in contact with the interior of the outer shell 1, this ensures that the filter element body and the outer shell 1 can always maintain the effect of maintaining the axis colinearity. When the filter element closed end cap 7 is lowered to the bottom of the outer shell 1, the end cap positioning protrusion 701 on the lower surface of the filter element closed end cap 7 can be inserted into the end cap positioning groove 101, thereby further realizing the positioning function of the filter element assembly, preventing it from deflecting in the circumferential direction, and thus ensuring the accuracy of the positioning of the filter element assembly inside the outer shell 1. Then place a hot melt heating plate on the upper open end of the outer shell cylinder 1 and the upper end of the filter element open end cover 6, the lower surface of the hot melt heating plate contacts the upper open end of the outer shell cylinder 1 and the filter element open end cover 6, and the upper surface of the hot melt heating plate contacts the inlet and outlet end covers 2, thereby heating the upper open end of the outer shell cylinder 1, the filter element open end cover 6 and the inlet and outlet end covers 2. After heating to the expected temperature, withdraw the hot melt heating plate, and then the upper open end of the outer shell cylinder 1 and the filter element open end cover 6 are docked with the inlet and outlet end covers 2, thereby achieving the fixation between the upper open end of the outer shell cylinder 1 and the filter element open end cover 6 and the inlet and outlet end covers 2 respectively.

[0029] In this embodiment, the filter element body includes a filter element center rod 3, a filter element membrane 4 is disposed on the outside of the filter element center rod 3, and a filter element cover 5 is disposed on the outside of the filter element membrane 4. That is, the filter element center rod 3 and the filter element cover 5 are respectively disposed on the inside and outside of the filter element membrane 4. Furthermore, the filter element cover 5 has a cover positioning protrusion 501 on its outer wall, and the filter element cover 5 uses the cover positioning protrusion 501 to achieve the positioning function of the filter element body.

[0030] In this embodiment, four housing positioning protrusions 501 are provided on the outer wall of each filter element housing 5. These four housing positioning protrusions 501 are evenly distributed along the circumference of the outer wall of the filter element housing 5, i.e., the central angle between two adjacent housing positioning protrusions 501 is 90°. Furthermore, those skilled in the art may adjust the specific number of housing positioning protrusions 501 based on actual needs, such as two, three, five, or more, and the number is not limited to this.

[0031] In this embodiment, the length of the outer cover positioning protrusion 501 (the length here is Figure 1The length in the horizontal direction) is half of the difference between the inner diameter of the outer shell cylinder 1 and the outer diameter of the filter element cover 5, and the formula is expressed as: the length of the outer cover positioning protrusion 501 = (the inner diameter of the outer shell cylinder 1 - the outer diameter of the filter element cover 5) / 2, that is, the length of the outer cover positioning protrusion 501 matches the gap between the outer shell cylinder 1 and the filter element cover 5, thereby ensuring that the two ends of the outer cover positioning can always be in contact with the outer shell cylinder 1 and the filter element cover 5 respectively, thereby ensuring the support stability of the outer cover positioning protrusion 501.

[0032] In this embodiment, the end cap positioning protrusion 701 is a cross-shaped protrusion, and the end cap positioning groove 101 is a cross-shaped groove. Of course, the end cap positioning protrusion 701 and the end cap positioning groove 101 can also be configured in other shapes, such as a straight line, a triangle, or other polygonal structures, as long as they can limit the rotational movement of the filter element assembly within the outer shell 1.

[0033] In this embodiment, the upper end of the outer shell body 1 is a cylindrical structure, and the lower end of the outer shell body 1 is provided with a tapered portion, i.e., a closing structure. Specifically, the inner diameter of the tapered portion is from top to bottom ( Figure 1 Correspondingly, the lower end of the filter element body at the bottom is also tapered and matches the tapered portion of the outer shell 1. This further enhances the connection between the outer shell 1 and the filter element assembly.

[0034] In this embodiment, the outer shell 1, inlet and outlet caps 2, and filter element assembly are all made of PP (polypropylene), HDPE (high-density polyethylene), or PFA plastic, and each component can be injection molded. Alternatively, the filter element membrane 4 can be made of a polymer material such as PTFE (polytetrafluoroethylene), UPE (ultra-high molecular weight polyethylene), nylon, or polysulfone. The filter element center rod 3 and filter element outer cover 5 can also be made of a polymer material such as UPE.

[0035] In this embodiment, when the filter element assembly includes two or more filter element bodies, and each filter element body is connected in sequence up and down, two adjacent filter element bodies are connected by a connecting device.

[0036] In this embodiment, the specific structure of the connecting device is as follows: Figure 2 As shown, the connection device includes two filter element connection plates 8, which are fixed to two adjacent filter element bodies. The filter element connection plates 8 are annular plates with a central through-hole that allows the filter element center rod 3 to pass through. The two filter element connection plates 8 are each provided with a hot melt protrusion 9 on one adjacent surface. The corresponding hot melt protrusions 9 on the two filter element connection plates 8 are connected by hot melt, thereby achieving a connection between the two filter element connection plates 8 (and their filter element bodies).

[0037] In this embodiment, the heat-melting protrusion 9 is an annular protrusion. Furthermore, each filter element connecting plate 8 is provided with two heat-melting protrusions 9, and the two heat-melting protrusions 9 on each filter element connecting plate 8 have different diameters and are respectively located on the inner and outer sides of the filter element connecting plate 8. This arrangement has two advantages: first, the provision of two heat-melting protrusions 9 increases the heat-melting area, thereby improving the connection strength between two adjacent filter element bodies; second, the two heat-melting protrusions 9 are respectively located on the inner and outer sides of the filter element connecting plate 8, so there is no dead angle between the two adjacent filter element connecting plates 8, and foreign matter cannot enter the space between the two filter element connecting plates 8.

[0038] The welding method between two adjacent filter element bodies is as follows:

[0039] 1. Clamp the two filter elements with the welding machine and align them vertically with the heating plate of the welding machine.

[0040] 2. Adjust the distance between the two filter element connecting plates 8 and the heating plate so that the heating plate can fully heat the welding edges of the hot melt protrusions 9 on the filter element connecting plates 8.

[0041] 3. Execute the heating program.

[0042] 4. After the heating process is completed, remove the heating plate and bring the two filter elements closer together and in contact. The melting depth can be 1mm to 5mm, which is adjusted according to different materials and applications.

[0043] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" and the like are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of this utility model, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integrated connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application.

[0045] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integral molding using a casting process) (except where it is obviously not possible to use an integrated molding process).

[0046] In addition, unless otherwise stated, the terms used in any technical solution disclosed in the present utility model to express positional relationships or shapes include states or shapes that are approximate, similar, or close thereto.

[0047] Any component provided by the present invention can be assembled from multiple separate components, or can be a separate component manufactured by an integral forming process.

[0048] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in this utility model without affecting the effects and purposes that can be achieved by the present utility model.

[0049] It should also be noted that in the embodiments of the present application, the same figure mark represents the same component or the same part.

[0050] Adaptive changes based on actual needs are all within the scope of protection of this utility model.

[0051] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A filter structure that ensures precise welding positioning, characterized by: The invention comprises an outer shell cylinder (1), wherein a filter element assembly is placed in the outer shell cylinder (1), wherein the filter element assembly comprises a filter element opening end cover (6), at least one filter element body and a filter element closed end cover (7) connected in sequence, and the upper open end of the outer shell cylinder (1) and the filter element opening end cover (6) are both fixedly connected to the inlet and outlet end covers (2); A plurality of outer cover positioning protrusions (501) are provided on the outer wall of the filter element body, and the end of the outer cover positioning protrusion (501) away from the filter element body can abut against the inner wall of the outer shell cylinder (1); an end cover positioning protrusion (701) is provided on the end of the filter element closed end cover (7) away from the filter element body, and an end cover positioning groove (101) is provided at the bottom of the outer shell cylinder (1), and the end cover positioning protrusion (701) can be inserted into the end cover positioning groove (101).

2. The filter structure for ensuring precise welding positioning according to claim 1, characterized in that: The filter element body comprises a filter element center rod (3), a filter element filter membrane (4) is provided on the outside of the filter element center rod (3), a filter element outer cover (5) is provided on the outside of the filter element filter membrane (4), and the outer wall of the filter element outer cover (5) is provided with the outer cover positioning protrusion (501).

3. The filter structure for ensuring precise welding positioning according to claim 2, characterized in that: Four outer cover positioning protrusions (501) are provided on the outer wall of each filter element outer cover (5), and the four outer cover positioning protrusions (501) are evenly distributed along the circumferential direction of the outer wall of the filter element outer cover (5).

4. The filter structure for ensuring precise welding positioning according to claim 2, characterized in that: The length of the outer cover positioning protrusion (501) is half the difference between the inner diameter of the outer shell cylinder (1) and the outer diameter of the filter element outer cover (5).

5. The filter structure for ensuring precise welding positioning according to claim 1, characterized in that: The end cover positioning protrusion (701) is a cross-shaped protrusion, and the end cover positioning groove (101) is a cross-shaped groove.

6. The filter structure for ensuring precise welding positioning according to claim 1, characterized in that: A tapered portion is provided at the lower end of the outer shell cylinder (1), and the inner diameter of the tapered portion gradually decreases from top to bottom.

7. The filter structure for ensuring precise welding positioning according to claim 1, characterized in that: The outer shell (1), the inlet and outlet end covers (2) and the filter element assembly are all made of PP, HDPE or PFA.

8. The filter structure for ensuring precise welding positioning according to claim 1, characterized in that: When the filter element assembly includes two or more filter element bodies, two adjacent filter element bodies are connected via a connecting device.

9. The filter structure for ensuring precise welding positioning according to claim 8, characterized in that: The connecting device comprises two filter element connecting plates (8), and a hot melt protrusion (9) is provided on an adjacent surface of the two filter element connecting plates (8), and the hot melt protrusions (9) on the two filter element connecting plates (8) are connected by hot melting.

10. The filter structure for ensuring precise welding positioning according to claim 9, characterized in that: The hot-melt protrusion (9) is a circular protrusion, and two hot-melt protrusions (9) are provided on each filter element connecting plate (8).

Images