Bag type filter

Abstract

The utility model relates to the technical field of filters, in particular to a bag type filter which comprises a filter body, the filter body is provided with an inner cavity, a downstream connector and an upstream connector are arranged at the two ends of the filter body in the axial direction of the filter body respectively, and at least two sealing pieces are sleeved outside the peripheral side wall of the upstream connector. The downstream joint and the upstream joint are respectively communicated with the inner cavity of the filter body; the filter element is arranged in the inner cavity of the filter body. The peripheral side wall of the upstream connector is sleeved with at least two sealing pieces, so that the sealing reliability when the upstream connector is connected with the tool can be improved. And when one sealing element fails, the other sealing element can also play a sealing role, so that the fault tolerance of the failure of the sealing element is improved, and the safety and the reliability of the filtering process of the bag type filter can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a bag filter. Background Art

[0002] The quick-install bag filter is generally used in cooperation with a tooling, and the installation method is to insert it upward into the tooling. During the use of this quick-install bag filter, affected by the pressure, temperature of the fluid and the high-frequency vibration generated in the use environment, the pressure, temperature and chemical properties of the upstream fluid of the filter are likely to cause seal failure, and finally leakage occurs. This will have a serious impact on the chemical mechanical polishing of semiconductors or other manufacturing processes and the personal safety of operators, resulting in a large amount of economic losses. Summary of the Utility Model

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a bag filter, which is used to solve the problem of potential safety hazards and economic losses caused by easy seal failure during the use of the prior art.

[0004] To achieve the above purpose and other related purposes, the present utility model provides a bag filter, including:

[0005] A filter body, the filter body has an inner cavity, and a downstream joint and an upstream joint are respectively arranged at both ends of the filter body along its axis. At least two sealing members are sleeved on the outer peripheral side wall of the upstream joint, and the downstream joint and the upstream joint are respectively communicated with the inner cavity of the filter body;

[0006] A filter element, which is arranged in the inner cavity of the filter body.

[0007] Optionally, at least two of the sealing members are axially spaced along the outer peripheral side wall of the upstream joint.

[0008] Optionally, the filter element is welded to the inner cavity wall of the filter body.

[0009] Optionally, the filter element includes a filter element body and a connecting component, the connecting component includes a first connecting member and a second connecting member, and the first connecting member and the second connecting member are respectively arranged at both ends of the filter element body along its axis.

[0010] Optionally, the filter element body includes a pressing membrane, a filtering membrane and a supporting membrane which are sequentially stacked along the water flow direction, and the pressing membrane presses the filtering membrane on the outer side of the supporting membrane along the water flow direction.

[0011] Optionally, the filtering membrane is folded into a corrugated shape and has corrugated protrusions, and a hollow part is arranged on the supporting membrane, and the corrugated protrusions are correspondingly arranged in the hollow part.

[0012] Optionally, the hollowed-out portion includes a rectangular hole penetrating in the thickness direction of the support film.

[0013] Optionally, the filter body includes an upstream housing, a downstream housing, and an outer cylinder. The upstream housing and the downstream housing are respectively disposed at two ends of the outer cylinder along its axial direction. The inner walls of the upstream housing, the downstream housing, and the outer cylinder form the inner cavity.

[0014] Optionally, a first flange and a second flange are respectively disposed on opposite sides of the downstream housing and the first connecting member. The second flange is sleeved on the outer peripheral side wall of the first flange.

[0015] Optionally, a third flange is disposed on an edge of the upstream housing facing the outer cylinder, and a fourth flange is disposed on an edge of the downstream housing facing the outer cylinder. The third flange and the fourth flange are respectively sleeved on the outer peripheral side walls of two ends of the outer cylinder along its axial direction.

[0016] As described above, the capsule filter of the present utility model has the following beneficial effects:

[0017] By sleeving at least two seals on the outer peripheral side wall of the upstream joint, the reliability of the seal when the upstream joint is connected to the tooling can be increased. When one of the seals fails, the other seals can still play a sealing role, improving the fault tolerance of seal failure and greatly improving the safety and reliability of the filtration process of the capsule filter. Brief Description of the Drawings

[0018] Figure 1 is a perspective view of an embodiment of the present utility model;

[0019] Figure 2 is a front view of an embodiment of the present utility model;

[0020] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in

[0021] Figure 4 is a schematic structural view of the filter membrane of an embodiment of the present utility model.

[0022] Description of Part Numbers

[0023] 1 - Filter body; 11 - Upstream housing; 111 - Third flange; 12 - Outer cylinder; 13 - Downstream housing; 131 - First flange; 132 - Fourth flange; 2 - Filter element; 21 - Pressing film; 22 - Support film; 221 - Hollowed-out portion; 23 - Filter membrane; 231 - Pleated protrusion; 24 - First connecting member; 241 - Second flange; 25 - Second connecting member; 31 - Downstream joint; 32 - Upstream joint; 321 - Seal. Detailed implementation mode

[0024] The following uses specific specific examples to illustrate the implementation mode of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model.

[0025] It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex. The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical substance significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope under which the present utility model can be implemented.

[0026] Please refer to Figures 1 to 3, this embodiment provides a capsule filter, including a filter body 1 and a filter element. The filter element is disposed within the inner cavity of the filter body 1. Both the filter body 1 and the filter element are in the shape of a hollow cylinder. There is a gap between the outer peripheral sidewall of the filter element and the inner cavity wall of the filter body 1 to facilitate the flow and filtration of the water to be filtered. The filter body 1 has an inner cavity. At both ends of the filter body 1 along its axial direction, a downstream joint 31 and an upstream joint 32 are respectively provided. The downstream joint 31 and the upstream joint 32 penetrate through along their respective axial directions to form a flow channel. The downstream joint 31 and the upstream joint 32 are also both in the shape of a cylinder. The downstream joint 31 and the upstream joint 32 are respectively communicated with the inner cavity of the filter body 1, that is, the downstream joint 31 and the upstream joint 32 are communicated through the inner cavity of the filter body 1. The downstream joint 31 and the upstream joint 32 are respectively matched with two joints of the tooling. At least two seals 321 are sleeved on the outer peripheral sidewall of the upstream joint 32. The sizes of the two seals 321 are exactly the same and are equal to the inner diameter of the corresponding joint of the tooling. The seal 321 can be a rubber sealing ring. Water flows into the inner cavity of the filter body 1 from the upstream joint 32, then passes through the outer peripheral sidewall of the filter element and enters the filter element to complete filtration, and finally flows out of the capsule filter from the downstream joint 31.

[0027] In this embodiment, by sleeving at least two seals 321 on the outer peripheral sidewall of the upstream joint 32, the reliability of the seal when the upstream joint 32 is connected to the tooling can be increased. When one of the seals 321 fails, the other seals 321 can still play a sealing role, improving the fault tolerance of the seal 321 failure, and greatly improving the safety and reliability of the filtration process of the capsule filter.

[0028] In one embodiment, as Figures 1 to 3 shown, at least two seals 321 are axially spaced along the outer peripheral sidewall of the upstream joint 32. When one of the seals 321 fails to seal, there is still a buffer space between the two seals 321, and the unsealed seals 321 can still play a better sealing role, further improving the reliability of the seal when the upstream joint 32 is connected to the tooling.

[0029] In one embodiment, the filter element is welded to the inner cavity wall of the filter body 1 by hot melting. During the use of the capsule filter, affected by the pressure, temperature of the fluid and the high-frequency vibration generated in the use environment, the filter element inside is extremely likely to fall off, resulting in filtration failure. This will also have a serious impact on the chemical mechanical polishing of semiconductors or their manufacturing processes, causing a large amount of economic losses. The hot melting welding of the filter element can improve the connection strength between the filter element and the filter body 1, avoid the situation of the filter element falling off during use, and thus improve the efficiency and safety of the use of the capsule filter.

[0030] In one embodiment, the filter element includes a filter element body for filtering and a connection component for fixing the filter element body. The filter element body is axially penetrated. The connection component includes a first connection member 24 and a second connection member 25, and the first connection member 24 and the second connection member 25 are respectively arranged at both axial ends of the filter element body. The filter element is a multi-layer filter element. The second connection member 25 is a circular plate and is arranged at the bottom end of the filter element body to fix the bottom end of the filter element and prevent the bottom end of the filter element from spreading. The first connection member 24 is an annular plate and is arranged at the top end of the filter element body. The hollow position of the filter element corresponds to and cooperates with the hollow position of the ring of the first connection member 24, and the water flowing through the filter element flows to the downstream joint 31 from the hollow position of the first connection member 24. The top surface of the first connection member 24 is welded to the inner cavity wall of the filter body 1. Through the connection component, the upper and lower ends of the filter element can be fixed, preventing the upper and lower ends of the filter element from being scattered and losing the filtering function. The filter element body can also be heat-melt welded and fixed to the inner cavity wall of the filter body 1 through the first connection member 24, improving the connection stability of the filter element body and thus enhancing the use safety.

[0031] In one embodiment, as Figure 3 shown, the filter element body includes a pressing membrane 21, a filtering membrane 23, and a supporting membrane 22 that are sequentially stacked along the water flow direction. The pressing membrane 21 presses the filtering membrane 23 against the outer side of the supporting membrane 22 along the water flow direction. The water flow direction is from the inner cavity of the filter body 1 to the inside of the filter element body, that is, the filter element body includes a pressing membrane 21, a filtering membrane 23, and a supporting membrane 22 that are sequentially stacked along the direction away from the inner cavity wall of the filter body 1. The filtering membrane 23 is fixed between the pressing membrane 21 and the supporting membrane 22. Both the pressing membrane 21 and the supporting membrane 22 are polypropylene membranes. The polypropylene membrane has good physical stability, mechanical strength, airtightness, relatively high transparency and gloss, and is tough and wear-resistant. Due to different water pressure magnitudes, when water flows through the filter element body, it is very likely to cause the filtering membrane 23 to deform or skew, affecting the filtering function of the filtering membrane 23. The filtering membrane 23 is fixed by the pressing membrane 21 and the filtering membrane 23 to prevent the filtering membrane 23 from deforming and causing filtering failure when the water flow and water pressure are large.

[0032] In one embodiment, as Figure 3 and Figure 4 shown, the filtering membrane 23 is folded into a corrugated shape and forms corrugated protrusions 231, which can increase the contact area between the filtering membrane 23 and the water flow, thereby improving the filtering effect of the filtering membrane 23. The supporting membrane 22 is provided with a hollow portion 221, and the corrugated protrusions 231 are correspondingly arranged in the hollow portion 221. The hollow portion 221 provides a position and space for accommodating the corrugated protrusions 231, so that there is no need for additional space between the pressing membrane 21 and the supporting membrane 22 to accommodate the corrugated protrusions 231, reducing the overall volume of the filter element body and also improving the fixing effect of the pressing membrane 21 and the supporting membrane 22 on the filtering membrane 23, thereby enhancing the filtering effect.

[0033] In one embodiment, as Figure 3 and Figure 4 shown, the number of the corrugated protrusions 231 is multiple. The number of the hollow portions 221 is also multiple, and the multiple hollow portions 221 are arranged at intervals along the axial direction and / or the circumferential direction of the outer peripheral side wall of the support film 22. The corrugated protrusions 231 and the hollow portions 221 are arranged in one-to-one correspondence respectively. The multiple corrugated protrusions 231 can improve the filtering effect of the filter membrane 23.

[0034] In one embodiment, as Figure 3 shown, the hollow portion 221 includes a rectangular hole penetrating through the thickness direction of the support film 22, and the size of the rectangular hole is matched with the size of the corrugated protrusion 231. The process of the rectangular hole is simple and is relatively adapted to the shape of the corrugated protrusion 231.

[0035] In one embodiment, as Figure 3 shown, the filter body 1 includes an upstream housing 11, a downstream housing 13 and an outer cylinder 12. The upstream housing 11 and the downstream housing 13 are respectively arranged at both ends of the outer cylinder 12 along its axial direction, and the inner walls of the upstream housing 11, the downstream housing 13 and the outer cylinder 12 form the inner cavity of the filter body 1. The above structure facilitates the disassembly and assembly of the filter body 1 itself and the disassembly and assembly of the filter element in the inner cavity of the filter body 1.

[0036] In one embodiment, as Figure 3 shown, a first flange 131 is arranged on the inner wall of the downstream housing 13, that is, a first flange 131 is arranged on the bottom surface of the downstream housing 13. A second flange 241 is arranged on the side of the first connecting member 24 facing the downstream housing 13, that is, a second flange 241 is arranged on the top surface of the first connecting member 24. The second flange 241 is sleeved on the outer peripheral side wall of the first flange 131, that is, the inner side wall of the second flange 241 abuts against the outer peripheral side wall of the first flange 131. The first flange 131 and the second flange 241 are connected by hot melt welding, and the filter element is fixed in the filter body 1 through the connection between the first flange 131 and the second flange 241. The contact area and the welding area of the above structure are large, and the connection strength is better, thereby improving the connection strength between the filter element and the filter body 1.

[0037] In one embodiment, as Figure 3As shown, a third flange 111 is provided on one side edge of the upstream housing 11 facing the outer cylinder 12, that is, a third flange 111 is provided on the outer edge of the top of the upstream housing 11. A fourth flange 132 is provided on one side edge of the downstream housing 13 facing the outer cylinder 12, that is, a fourth flange 132 is provided on the outer edge of the bottom of the downstream housing 13. The third flange 111 is sleeved on the outer side wall of the bottom end of the outer cylinder 12, and the fourth flange 132 is sleeved on the outer side wall of the top end of the outer cylinder 12. The connection stability between the upstream housing 11 and the downstream housing 13 and the outer cylinder 12 is improved.

[0038] In one embodiment, an annular groove is provided on the top end surface of the downstream joint 31, and a sealing member is fitted in the groove, which can improve the sealing effect when connecting with the tooling.

[0039] In one embodiment, flanges are respectively provided on the outer peripheral side walls of the top end of the downstream joint 31 and the bottom end of the upstream joint 32, which facilitates the connection between the downstream joint 31 and the upstream joint 32 and the tooling.

[0040] The above embodiments merely illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A bladder filter, characterized in that, Comprising: A filter body having an inner cavity, with a downstream joint and an upstream joint respectively provided at both ends of the filter body along its axis. At least two seals are sleeved on the outer peripheral side wall of the upstream joint, and the downstream joint and the upstream joint are respectively communicated with the inner cavity of the filter body; A filter element disposed within the inner cavity of the filter body; At least two of the seals are axially spaced along the outer peripheral side wall of the upstream joint.

2. The bladder filter according to claim 1, wherein The filter element is welded to the inner cavity wall of the filter body.

3. The bladder filter according to claim 2, characterized in that, The filter element includes a filter element body and a connection assembly. The connection assembly includes a first connecting member and a second connecting member, and the first connecting member and the second connecting member are respectively disposed at both ends of the filter element body along its axis.

4. The bladder filter according to claim 3, wherein, The filter element body includes a pressing film, a filtering film, and a supporting film that are sequentially stacked in the water flow direction, and the pressing film presses the filtering film against the outer side of the supporting film in the water flow direction.

5. The capsule filter according to claim 4, characterized in that, The filtering film is folded into a corrugated shape and has corrugated protrusions. A hollowed-out portion is provided on the supporting film, and the corrugated protrusions are correspondingly disposed within the hollowed-out portion.

6. The bladder filter according to claim 5, characterized in that, The hollowed-out portion includes a rectangular hole penetrating through the thickness direction of the supporting film.

7. The bladder filter according to any one of claims 1 to 6, characterized in that, The filter body includes an upstream housing, a downstream housing, and an outer cylinder. The upstream housing and the downstream housing are respectively disposed at both ends of the outer cylinder along its axis, and the inner walls of the upstream housing, the downstream housing, and the outer cylinder form the inner cavity.

8. The bladder filter according to claim 7, wherein A first flange and a second flange are respectively provided on the opposite side of the downstream housing from the first connecting member, and the second flange is sleeved on the outer peripheral side wall of the first flange.

9. The bladder filter according to claim 7, wherein A third flange is provided on the edge of the upstream housing facing the outer cylinder, and a fourth flange is provided on the edge of the downstream housing facing the outer cylinder. The third flange and the fourth flange are respectively sleeved on the outer peripheral side walls of both ends of the outer cylinder along its axis.

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