Bag type filter

Abstract

The utility model provides a bag type filter which comprises a shell, the shell comprises a shell barrel and connector end covers connected with the two sides of the shell barrel, the connector end covers comprise the first connector end cover and the second connector end cover, exhaust valves are arranged on the connector end covers, exhaust valve cores are arranged at the ends, away from the connector end covers, of the exhaust valves, and the connector end covers comprise connector parts. The bag type filter comprises a shell and a connector part communicated with the shell, and an end cover part communicated with the connector part, the end, away from the connector part, of the end cover part deviates inwards to form a connecting part, a plurality of hanging rings are arranged on the shell, and the hanging rings and the shell are connected to define hanging holes; the filter element assembly comprises a filter element shell, a filter element center rod, a filter element blank cap, a filter element end cover and a folding filter membrane, and a plurality of through holes are formed in the two ends of the filter element shell. According to the bag type filter, the bag type filter can be suspended and fixed during use, and the filter element shell is provided with the through hole, so that the utilization rate of the folded filter membrane is higher, and the filtering efficiency is higher.

Description

Technical Field

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

[0002] The bag filter is also called an integrated filter, which adopts a folded filter membrane with a large filtration surface area and is suitable for filtering larger-volume solutions. And the bag filter is generally not used disposable, and users usually reuse it.

[0003] The design and application of the bag filter have experienced many years of development and innovation. With the progress of technology, the bag filter tends to be modularized, which simplifies the operation process of the equipment, improves the flexibility and adaptability of the equipment, and can better meet the needs of different industries and applications. The bag filter adopts high-performance filter materials such as polyamide and polypropylene, which have higher filtration accuracy and longer service life, can effectively remove fine particles and microorganisms, and ensure the high purity and sterility of products. For corrosive media in specific industrial environments, the bag filter is made of corrosion-resistant materials such as stainless steel and nickel-based alloys, which enhances the durability and stability of the equipment.

[0004] In the prior art, the shell of the bag filter is mostly cylindrical. When the connecting joints at both ends are used, the filter cannot be fixed. The internal cylindrical design results in a large dead volume during filtration, and the wetting efficiency at both ends of the filter element shell is poor, and the utilization rate of the folded filter membrane is low. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a bag filter, aiming to solve the technical problems that the filter cannot be fixed during installation, the dead volume is large during internal filtration, and the utilization rate of the folded filter membrane is low in the prior art.

[0006] To achieve the above purpose, the utility model is realized by the following technical solutions: A bag filter includes a shell, the shell includes a shell cylinder body, and joint end caps connected to both sides of the shell cylinder body. The joint end caps include a first joint end cap and a second joint end cap. An exhaust valve is provided on the joint end cap, and an exhaust valve core is provided at one end of the exhaust valve away from the joint end cap. The joint end cap includes a joint part and an end cap part communicating with the joint part. One end of the end cap part away from the joint part is offset inward to form a connecting part. A plurality of hanging rings are provided on the shell, and the hanging rings are connected to the shell to enclose a hanging hole. The bag filter further includes a filter element assembly disposed inside the shell for filtering liquid. The filter element assembly includes a filter element shell, a folded filter membrane and a filter element center rod nested in the filter element shell in sequence. The filter element assembly further includes a filter element blank cap and a filter element end cap connected to both ends of the filter element shell. A plurality of through holes are provided at both ends of the filter element shell.

[0007] Compared with the prior art, the beneficial effects of the present utility model are as follows: With the above design, the filter can be suspended and fixed through the hanging holes during use, avoiding supporting and fixing the filter through the two end joints; and by offsetting the end cover part of the joint end cover, the dead volume of the cavity inside the filter is reduced, improving the filtration efficiency; in the prior art, in order to ensure a certain structural strength, both ends of the filter element housing are set as sealed types, resulting in low wetting efficiency, low utilization rate, and low filtration efficiency at both ends of the folded filter element of the filter. Therefore, through holes are opened at both ends of the filter element housing. The through holes can pass the filtered liquid while not affecting the overall structural strength, so that both ends of the folded filter element are wetted, improving the filtration efficiency.

[0008] According to one aspect of the above technical solution, a limiting retaining ring extends outward near both ends of the outer shell cylinder, and an anti-overflow rib extends outward along the outer edge of one end of the connecting part away from the joint part.

[0009] According to one aspect of the above technical solution, the outer shell is provided with a first hanging ring and a second hanging ring. The first hanging ring is arranged on the first joint end cover, the second hanging ring is arranged on the second joint end cover, one end of the first hanging ring is connected to the connecting part, and the other end is connected to the surface of the end cover part.

[0010] According to one aspect of the above technical solution, one end of the hanging ring is flush with the side of the connecting part, and the other end is flush with the upper surface of the end cover part.

[0011] According to one aspect of the above technical solution, the exhaust valve is arranged at one end of the end cover part close to the joint part, and the lowest point of the inner diameter of the exhaust valve is higher than the highest point of the inner side wall of the end cover part.

[0012] According to one aspect of the above technical solution, the filter element central rod is arranged inside the filter element housing. A folded filter membrane is arranged between the filter element central rod and the filter element housing. The filter element blank cover is hermetically connected to the filter element housing, the folded filter membrane and the filter element central rod, and the filter element end cover is hermetically connected to the filter element housing, the folded filter membrane and the filter element central rod.

[0013] According to one aspect of the above technical solution, one end of the filter element end cover is hermetically connected to the second joint end cover, and one end of the filter element end cover is communicated with the second joint end cover.

[0014] According to one aspect of the above technical solution, the outer installation part of the exhaust valve core is arranged in a plum blossom hexagon shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a bladder filter in an embodiment of the present utility model;

[0016] Figure 2 Cross-sectional view of a bladder filter in an embodiment of the present utility model;

[0017] Figure 3 Partial schematic view of a bladder filter in an embodiment of the present utility model;

[0018] Figure 4 Schematic structural view of the joint end cover of a bladder filter in an embodiment of the present utility model;

[0019] Figure 5 Schematic structural view of the filter element housing of a bladder filter in an embodiment of the present utility model;

[0020] Description of main component symbols: 1 - housing, 11 - housing cylinder, 111 - limit retaining ring, 12 - joint end cover, 121 - first joint end cover, 122 - second joint end cover, 123 - joint part, 124 - end cover part, 125 - connecting part, 126 - anti-overflow edge; 13 - exhaust valve, 14 - exhaust valve core; 2 - hanging ring, 21 - first hanging ring, 22 - second hanging ring, 23 - hanging hole, 3 - filter element assembly, 31 - filter element blanking plug, 32 - filter element housing, 321 - through hole, 33 - folded filter membrane, 34 - filter element center rod, 35 - filter element end cover;

[0021] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific Embodiments

[0022] For ease of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] Please refer to Figures 1 to 2 , a bag filter provided by an embodiment of this utility model includes a housing 1. The housing 1 includes a housing cylinder 11 and joint end caps 12 connected to both sides of the housing cylinder 11. The joint end caps 12 include a first joint end cap 121 and a second joint end cap 122. An exhaust valve 13 is provided on the joint end cap 12. An exhaust valve core 14 is provided at one end of the exhaust valve 13 away from the joint end cap 12. The joint end cap 12 includes a joint part 123 and a end cap part 124 communicating with the joint part 123. A connecting part 125 is formed by the end cap part 124 offsetting inward at one end away from the joint part 123. A plurality of hanging rings 2 are provided on the housing 1. The hanging rings 2 are connected to the housing 1 to enclose a hanging hole 23. The bag filter further includes a filter element assembly 3 disposed inside the housing 1 for filtering liquid. The filter element assembly 3 includes a filter element housing 32, a folded filter membrane 33 and a filter element center rod 34 nested in sequence inside the filter element housing 32. The filter element assembly 3 further includes filter element blanking caps 31 and filter element end caps 35 connected to both ends of the filter element housing 32.

[0026] Please refer to Figure 4, in this embodiment, the semi-circular hanging ring 2 can be connected to the outer shell cylinder 11 (not shown in the figure), or installed on the joint end cover 12. Installing it on the outer shell cylinder 11 can also play a role in hanging and fixing, but installing it on the outer shell cylinder 11 will be very protruding, affecting the appearance. At the same time, the protruding part also makes the volume of the whole filter larger, which is not conducive to use in a narrow space; installing the hanging ring 2 on the joint end cover 12, and because one end of the end cover part 124 of the joint end cover 12 offsets a distance towards the central axis of the joint end cover 12 to form a connecting part 125, the connecting part 125 and the body of the joint end cover 12 form a quarter-circular concave surface. At this time, the hanging ring 2 is installed at both ends of the concave surface. One end of the hanging ring 2 is connected to the upper surface of the connecting part 125, and the other end is connected to the end cover part 124. The arc area of the hanging ring 2 and the concave surface enclose a hanging hole 23 for hanging and fixing; one end of the hanging ring 2 connected to the connecting part 125 is flush with the outer edge of the connecting part 125, and the end connected to the end cover part 124 is flush with the inclined surface of the end cover part 124. Specifically, one end of the hanging ring 2 is flush with the side of the connecting part 125, and the other end is flush with the upper surface of the end cover part 124. After installing the hanging ring 2 on the filter, not only a hanging hole 23 with a hanging and fixing function is formed, but also the overall volume of the filter is not increased, and the overall appearance is beautiful and practical; there are two hanging rings 2 in this embodiment, which are respectively arranged on the first joint end cover 121 and the second joint end cover 122. Preferably, the outer shell 1 is provided with a first hanging ring 21 and a second hanging ring 22. The first hanging ring 21 is arranged on the first joint end cover 121, and the second hanging ring 22 is arranged on the second joint end cover 12. One end of the first hanging ring 21 is connected to the connecting part 125, and the other end is connected to the surface of the end cover part 124. It should be noted that the design of the offset of the end cover part 124 towards the central axis of the joint end cover 12 not only forms the concave surface part for the hanging hole 23, but more importantly, the offset part of the outer side to the inner side of the joint end cover 12 makes the inside of the joint end cover 12 protrude. Since the protruding part is the corner area where the joint end cover 12 is prone to generate a dead volume for filtration, the protruding part fills the dead volume area, thereby reducing the dead volume space inside the filter, reducing the waste of the liquid to be filtered, and improving the filtration efficiency.

[0027] Please refer to Figures 2 to 3, during the assembly process, first, the filter element housing 32, the filter element central rod 34, and the folded filter membrane 33 are sleeved with each other. Then, the filter element blanking cover 31 and the filter element end cover 35 are welded at both ends to complete the installation of the filter element assembly 3. Specifically, the filter element central rod 34 is arranged inside the filter element housing 32, and the folded filter membrane 33 is arranged between the filter element central rod 34 and the filter element housing 32. The filter element blanking cover 31 is hermetically connected to the filter element housing 32, the folded filter membrane 33, and the filter element central rod 34. The filter element end cover 35 is hermetically connected to the filter element housing 32, the folded filter membrane 33, and the filter element central rod 34. Then, one end of the filter element end cover 35 of the filter element assembly 3 is internally connected to the end cover portion 124 of the second joint end cover 122. Specifically, one end of the filter element end cover 35 is hermetically connected to the second joint end cover 122, and one end of the filter element end cover 35 is communicated with the second joint end cover 122 to complete the internal assembly process. It should be noted that the filter element blanking cover 31 is a fully closed cover, mainly to isolate and separate the open ends of the filter element housing 32, the filter element central rod 34, and the folded filter membrane 33. The filter element end cover 35 is an open-end closed cover, and the opening diameter is the same as the middle cavity of the filter element central rod 34, mainly to isolate and separate the area between the filter element housing 32, the folded filter membrane 33, and the outer end of the filter element central rod 34. Thus, the liquid to be filtered can only enter the cavity of the filter element central rod 34 through the filter element housing 32, the folded filter membrane 33, and the filter element central rod 34, and then flow out from the port of the second joint end cover 122 to achieve the filtering effect. Then, the second joint end cover 122 installing the filter element assembly 3 is sleeved into the filter housing cylinder 11 and welded to one end of the housing cylinder 11. The other end of the housing cylinder 11 is welded to the first joint end cover 121. In order to prevent the welding glue from overflowing and forming welding ribs when the joint end cover 12 is welded to the housing cylinder 11, which makes the surface of the filter not beautiful, an anti-overflow edge 126 is arranged on one side of the edge of the connecting portion 125 of the joint end cover 12, and at the same time, a limiting retaining ring 111 is arranged on the side of the housing cylinder 11. Specifically, the housing cylinder 11 extends outward near both ends to form the limiting retaining ring 111, and the outer edge of the end of the connecting portion 125 away from the joint portion 123 extends outward to form the anti-overflow edge 126; when the joint end cover 12 and the housing cylinder 11 are connected, the limiting retaining ring 111 and the anti-overflow edge 126 are in hard contact, playing a role of welding limit, and at the same time, a cavity is formed in the middle for accommodating and covering the welding glue and welding ribs overflowing from the welding, so that there is no glue overflow trace on the appearance and it is more beautiful. Then, the exhaust valve core 14 is installed on the exhaust valve 13 arranged on the joint end cover 12. In order to facilitate the installation of the exhaust valve core 14 on the exhaust valve 13, the outer edge of the exhaust valve core 14 is set in the shape of a plum blossom-edge hexagon, which is convenient for hand-twisting. Specifically, the outer installation portion of the exhaust valve core 14 is arranged in a plum blossom hexagon shape.Supplementary note, for the purpose of facilitating the discharge of the gas inside the filter, the exhaust valve 13 is arranged at one end of the end cover part 124 close to the joint part 123, and the lowest point of the inner diameter of the exhaust valve 13 is higher than the highest point of the inner side wall of the end cover part 124.

[0028] During the design and installation process of most filter elements, in order to ensure the structural strength at both circumferential ends, the filter element housing 32 close to the filter element blank cover 31 and the filter element end cover 35 is set as a closed cylinder, which results in that the folded filter membranes 33 at both ends cannot be thoroughly wetted during the filtration process, and it is a dead volume area for the filter element housing 32. Based on this, please refer to Figure 5 , in this embodiment, four through holes 321 are opened at each end of the filter element housing 32. The diameter of the through holes 321 is very small, so that the through holes 321 can allow liquid to flow through and will not affect the overall structural strength of the filter element housing 32. Preferably, a number of through holes 321 are provided at both ends of the filter element housing 32.

[0029] In summary, for the bag-type filter in the above embodiments of the present utility model, by installing a hanging ring on the joint end cover, the bag-type filter of the present utility model can be suspended and fixed during use. By skillfully using the inward offset setting of the joint end cover, not only the hanging hole problem is solved, but also the dead volume space inside the bag-type filter of the present utility model is reduced. An anti-overflow rib and a limit retaining ring are provided at the connection between the joint end cover and the outer shell cylinder, so that the present utility model has no welding ribs when viewed from the outside and looks more beautiful. By opening through holes at both ends of the filter housing, the internal folded filter is more easily wetted, with higher utilization rate and better filtration effect.

[0030] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0031] The above-described embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the appended claims.

Claims

1. A capsule filter, comprising a shell, the shell comprising a shell cylinder, and joint end covers connected to both sides of the shell cylinder, the joint end covers comprising a first joint end cover and a second joint end cover, the joint end cover is provided with an exhaust valve, and the exhaust valve is provided with an exhaust valve core at one end away from the joint end cover, characterized in that: The joint end cover includes a joint portion and an end cover portion connected to the joint portion, the end cover portion is offset inward away from one end of the joint portion to form a connecting portion, a plurality of hanging rings are provided on the outer shell, the hanging rings are connected to the outer shell to enclose a hanging hole, the capsule filter also includes a filter element assembly arranged inside the outer shell for filtering liquid, the filter element assembly includes a filter element outer shell, and a folded filter membrane and a filter element center rod nested in the filter element outer shell in sequence, the filter element assembly also includes a filter element cover and a filter element end cover connected to both ends of the filter element outer shell, and a plurality of through holes are provided at both ends of the filter element outer shell.

2. The capsule filter according to claim 1, characterized in that: The outer shell cylinder extends outwards near both ends to form a limit retaining ring, and the outer edge of one end of the connecting part away from the joint part extends outwards to form an anti-overflow retaining edge.

3. The capsule filter according to claim 1, characterized in that: The housing is provided with a first hanging ring and a second hanging ring, the first hanging ring is arranged on the first joint end cover, the second hanging ring is arranged on the second joint end cover, one end of the first hanging ring is connected to the connecting part, and the other end is connected to the surface of the end cover part.

4. The capsule filter according to claim 1, characterized in that: One end of the hanging ring is flush with the side edge of the connecting portion, and the other end is flush with the upper surface of the end cover portion.

5. The capsule filter according to claim 1, characterized in that: The exhaust valve is arranged at one end of the end cover portion close to the joint portion, and the lowest point of the inner diameter of the exhaust valve is higher than the highest point of the inner side wall of the end cover portion.

6. The capsule filter according to claim 1, characterized in that: The filter element center rod is arranged inside the filter element shell, the folded filter membrane is arranged between the filter element center rod and the filter element shell, the filter element cover is air-tightly connected with the filter element shell, the folded filter membrane and the filter element center rod, and the filter element end cover is air-tightly connected with the filter element shell, the folded filter membrane and the filter element center rod.

7. The capsule filter according to claim 1, characterized in that: One end of the filter element end cover is air-tightly connected to the second joint end cover, and one end of the filter element end cover is communicated with the second joint end cover.

8. The capsule filter according to claim 1, characterized in that: The outer mounting portion of the exhaust valve core is arranged in a plum blossom hexagonal shape.

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