CN219272380U - Bag filter and filtration system - Google Patents

Abstract

The utility model relates to a bag filter, which comprises a shell and a filter element fixed in the shell, wherein two ends of the shell are respectively provided with a joint; the joints comprise extension sections connected with the end parts of the shell and flanges positioned at the tail ends of the extension sections, and the difference of the thicknesses of the flanges of the joints is 1.5-2.5 mm; the end face of the flange is provided with an annular groove for installing a sealing ring, the hollow runner inside the extension section of each joint is separated from the annular groove through a first annular plane, the width of the sealing ring is 1.04-1.15 times of the width of the annular groove, and the thickness of the sealing ring is 1.1-1.2 times of the depth of the annular groove, under the premise of ensuring the sealing performance between the joint and the clamping groove, the sealing ring is ensured to be firmly clamped in the annular groove, and the situation that the sealing ring is clamped due to warping and partial rolling in the process of detaching the sealing ring from the clamping groove through a rotary bag type filter is avoided, so that the joint cannot be unscrewed from the clamping groove. A filter system comprising the bag filter and the clamp is also provided.

Description

Bag filter and filtration system

Technical Field

The utility model relates to the technical field of filtration, in particular to a bag filter and a filtration system.

Background

Chinese patent No. CN209612354U discloses a fast replaceable filter, which comprises a filter unit and a fixture, wherein the filter unit comprises a housing, a filter element positioned in the housing, and an inlet and an outlet at two ends of the housing, the inlet and the outlet have the same structure, and flanges are arranged at the ends of the filter element and the inlet and the outlet; the fixture comprises a fixture body, a first end block and a second end block, wherein the first end block and the second end block are respectively provided with an interface communicated with a fluid source and a filtrate container and a socket matched with the inlet and the outlet in structure, and the socket comprises a U-shaped opening positioned at the outer side and a clamping groove positioned at the inner side. Wherein the flanges at the ends of the two joints are the same in thickness, and correspondingly, the clamping grooves of the two end blocks are also the same in groove width, so that the flanges are clamped in a sealing manner.

Because the thickness of the two flanges is the same, the groove widths of the two clamping grooves are correspondingly equal, and when the filter unit is installed, the filter unit is easy to be reversely installed. And when the filter unit reaches the maximum service life, the old filter unit needs to be detached from the clamp, and if the old filter unit is pulled out quickly and directly, feed liquid can splash and spill from joints at two ends, so that the environment is polluted or the human body is injured. Therefore, the two flanges are slowly screwed out of the two clamping grooves by rotating the filtering unit, so that the sprinkling amount of the feed liquid can be effectively controlled. When the filter unit is rotated, the flange and the sealing ring arranged on the tail end face of the flange slide outwards on the inner wall of the clamping groove, and the sealing ring cannot be continuously moved outwards due to the fact that the relative size of the sealing ring and the groove at the tail end of the flange is unreasonable in design or the sealing ring cannot be clamped by the groove wall of the groove, the phenomenon that the sealing ring is warped and partially rolled up can occur in the process, and the flange and the partially rolled sealing ring are clamped at a certain position of the clamping groove.

Therefore, the relative sizes of the sealing ring and the groove at the tail end of the flange of the joint of the filter unit are improved and optimized, the clamping effect of the groove wall of the groove on the sealing ring is increased, and the problems that the sealing ring is warped and partially rolled and the flange and the sealing ring are clamped at a certain position of the clamping groove when the filter unit is disassembled in a rotating mode are avoided.

Disclosure of Invention

The utility model aims to provide a novel bag filter, which can avoid the problems of warping and local rolling of a sealing ring and the clamping of the flange and the sealing ring in a clamping groove of mounting equipment when the bag filter is dismounted by rotating by optimizing the relative size relation between the groove of the flange at the tail end of a joint and the sealing ring and increasing the clamping effect of the groove wall of the groove on the sealing ring. In addition, a filtration system including the capsule filter and a clamp is also provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the bag type filter comprises a shell and a filter element fixed in the shell, wherein two opposite ends of the shell are respectively provided with a joint;

the connector comprises an extension section connected with the end part of the shell and flanges positioned at the tail end of the extension section, the flanges of the connectors are different in thickness, and the difference of the thicknesses of the flanges is 1.5-2.5 mm; the end face of the flange is provided with an annular groove for installing a sealing ring, the inside of each extending section of the joint is hollow to form a runner, the runner and the annular groove are separated by a first annular plane, the width of the sealing ring is 1.04-1.15 times of the width of the annular groove, and the thickness of the sealing ring is 1.1-1.2 times of the depth of the annular groove.

The thickness of the flanges of the joints at the two ends of the shell of the capsule type filter is 1.5-2.5mm, and the two flanges are matched with corresponding clamping grooves, so that when the capsule type filter is installed, if the directions of the two joints are reversed, the capsule type filter cannot be installed, and the foolproof effect is achieved; in addition, the annular groove for installing the sealing ring and the flow channel of the joint are separated by a first annular plane, the first annular plane is directly adjacent to the annular groove and has a certain width, and the first annular plane corresponds to a cylindrical solid part with a certain width, so that the annular groove close to the wall of the flow channel can form a radial extrusion effect with higher strength on the sealing ring, and the sealing ring is clamped in the annular groove more firmly; more importantly, the width of the sealing ring is 1.04-1.15 times of the width of the annular groove, and the thickness of the sealing ring is 1.1-1.2 times of the depth of the annular groove, so that the sealing ring is firmly clamped in the annular groove on the premise of ensuring the sealing property between the joint and the clamping groove, and the phenomenon that the joint cannot be quickly unscrewed from the clamping groove due to buckling and partial rolling of the sealing ring in the process of detaching the sealing ring from the clamping groove of the equipment through the rotary bag type filter is avoided.

Further, the two end surfaces of the flange are in transitional connection with the outer peripheral wall of the flange through guide surfaces, the guide surfaces are conical surfaces, and the included angle between the guide surfaces and the axial direction is 40-50 degrees.

The arrangement of the guide surface ensures that the installation and the disassembly of the bag filter are more labor-saving, and particularly the operation that the flange is unscrewed from the clamping groove is smoother.

Further, the outer peripheral wall between the guide surfaces of the two end surfaces of the flange is a cylindrical wall, and the radial width of the cylindrical wall protruding out of the outer wall of the extension section is 6-6.4mm.

The arrangement of the radial width of the outer peripheral wall of the cylindrical wall shape can ensure that the tail end of the flange is provided with a sufficient size for arranging the annular groove so as to be capable of installing a sealing ring with a proper size, further ensuring the sealing between the flange and the clamping groove, and simultaneously, the radial width of the flange protruding out of the extension section is as small as possible, and the quick unscrewing of the joint is convenient.

Further, the guide surface and the annular groove at the end surface of the flange are separated by a second annular plane, and the width of the second annular plane is 1.6-2mm.

The second annular plane is directly adjacent to the annular groove, the radial width of the second annular plane is 1.6-2mm, and the second annular plane corresponds to a cylindrical solid part with the width of 1.6-2mm, so that the groove wall of the annular groove close to the guide surface can also form a radial extrusion effect with enough strength on the sealing ring. That is, the inner side and the outer side of the sealing ring in the annular groove are radially extruded, so that the sealing ring can be clamped in the annular groove more firmly, and the sealing ring cannot warp or be partially rolled up when the bag filter is disassembled in a rotating mode.

Further, the first annular plane and the second annular plane are flush, and the width of the first annular plane is 2.5-3.5mm.

The two annular planes are flush, and the first annular plane corresponds to the cylindrical solid part with the width of 2.5-3.5mm, so that the annular groove close to the groove wall of the runner can also form radial extrusion action with enough strength on the sealing ring, namely, the cylindrical solid parts corresponding to the two annular planes respectively form radial extrusion action with enough strength on the sealing ring from the inner side and the outer side, so that the sealing ring is firmly clamped in the annular groove, and the sealing ring cannot warp or roll up locally when the bag filter is disassembled in a rotating way.

Further, the shell comprises a cylinder body, a first end cover and a second end cover which are connected to the two ends of the cylinder body in a sealing mode, the connectors are respectively arranged on the first end cover and the second end cover, the first end cover is provided with a bulge portion protruding outwards and communicated with the corresponding connector, and the interface of the filter element is installed in the bulge portion in a sealing mode.

The first end cap is provided with an outwards protruding bulge which is communicated with a corresponding connector for sealing the interface for installing the filter element, and the part of the interface for installing the filter element is outwards protruding and is suitable for customers who install the first end cap vertically downwards, because the inside of the bag filter cannot be left with feed liquid, and waste is avoided.

Further, the bulge comprises a cylindrical section and an annular plate integrally formed at the tail end of the cylindrical section, the joint of the first end cover is integrally formed at the central hole of the annular plate and serves as a filtrate outlet, and the interface of the filter element is installed in the cylindrical section in a sealing way through a sealing ring.

The interface of filter core is firmly sealed through its cylindricality section to bulge to outwards form the joint in the centre bore department of its annular slab an organic whole, bulge forms promptly and connects between the surface of first end cover in an organic whole, and overall structure is simple, also can maintain the bulk strength of first end cover, also can not excessively increase the manufacturing degree of difficulty of first end cover.

Further, the width of the sealing ring is 3.4-3.6mm, and the thickness is 3.3-3.6mm.

The sealing ring with the size can provide a large enough sealing surface and axial compression amount, so that the sealing assembly between the flange and the clamping groove arranged outside is ensured; meanwhile, before being extruded by the clamping groove, the volume of the part of the sealing ring, which is positioned in the annular groove, is also large enough, so that the radial extrusion effect of the two groove walls of the annular groove on the two sides of the sealing ring is sufficient, and the sealing ring cannot warp or partially roll up when the bag-type filter is rotationally disassembled.

Further, the present application also provides a filtration system comprising a clamp and the above-described capsule filter, the clamp comprising a main body and two clamping portions at both ends of the main body, the clamping portions being for supporting the connectors at both ends of the capsule filter and having a fluid passage communicable with both connectors.

The application still provides the filtration system that anchor clamps and bag formula filter constitute together, anchor clamps play fixed and supporting role to bag formula filter to with bag formula filter and external piping connection, and user's operation is more convenient.

Further, each of the clamping portions includes an end block provided with the fluid passage and a pipe bracket for supporting the joint of the bag filter, the pipe bracket is fixed to a side of the end block facing the opposite end of the main body, a clamping groove for clamping a flange of the joint is formed between the pipe bracket and the end block, and a difference in width of the clamping groove of each clamping portion is 1.5-2.5mm.

The widths of the clamping grooves at the two ends of the clamp are different and correspondingly match with flanges with different thicknesses at the tail ends of the connector of the bag filter, so that the bag filter has a foolproof effect when being installed on the clamp, and the reverse installation of the inlet and the outlet of the bag filter is avoided.

In the capsule filter provided by the utility model, the thickness of the flanges of the joints at the two ends of the shell is 1.5-2.5mm, and the two flanges are matched with the corresponding clamping grooves, so that when the capsule filter is installed, if the directions of the two joints are reversed, the capsule filter cannot be installed, and thus the foolproof effect is achieved; in addition, the annular groove for installing the sealing ring and the flow channel of the joint are separated by a first annular plane, the first annular plane is directly adjacent to the annular groove and has a certain width, and the first annular plane corresponds to a cylindrical solid part with a certain width, so that the annular groove close to the wall of the flow channel can form a radial extrusion effect with higher strength on the sealing ring, and the sealing ring is clamped in the annular groove more firmly; more importantly, the width of the sealing ring is 1.04-1.15 times of the width of the annular groove, and the thickness of the sealing ring is 1.1-1.2 times of the depth of the annular groove, so that the sealing ring is firmly clamped in the annular groove on the premise of ensuring the sealing property between the joint and the clamping groove, and the phenomenon that the joint cannot be quickly unscrewed from the clamping groove due to buckling and partial rolling of the sealing ring in the process of detaching the sealing ring from the clamping groove of the equipment through the rotary bag type filter is avoided.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a cross-sectional view of a capsule filter according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of the first end cap of FIG. 1;

FIG. 3 is a cross-sectional view of the second end cap of FIG. 1;

FIGS. 4 and 5 are an isometric view and a cross-sectional view, respectively, of the seal ring of FIG. 1;

fig. 6 and 7 are an isometric view and a sectional view, respectively, of a capsule filter according to a second embodiment of the present utility model;

FIG. 8 is a cross-sectional view of a filtration system (cartridge of a capsule filter not shown) provided by the present utility model;

fig. 9 is a cross-sectional view of the clamp of fig. 8.

In the figures, 100-capsule filter, 1-housing, 11-first end cap, 12-second end cap, 13-cartridge, 14-fitting, 141-extension, 142-flange, 143-annular groove, 144-flow channel, 145-first annular flat, 146-guide surface, 147-cylindrical wall, 148-second annular flat, 15-bulge, 151-cylindrical segment, 152-annular plate, 153-central bore, 16-cartridge, 161-interface, 2-seal ring, 3-clamp, 31-body, 32-clamp, 33-fluid channel, 34-end block, 35-tube holder, 36-clamping groove, 4-cartridge, 41-interface, 42-seal.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

Fig. 1 shows a capsule filter 100 according to an embodiment of the present application, which includes a housing 1 and a filter element 4 fixed inside the housing 1, wherein two opposite ends of the housing 1 are respectively provided with a connector 14. The shell 1 comprises a cylinder 13, a first end cover 11 and a second end cover 12 which are connected with the two ends of the cylinder 13 in a sealing way, and the filter element 4 is connected with the first end cover 11 through welding; each joint 14 is provided on the first end cap 11 and the second end cap 12, respectively. For example, the connector 14 on the second end cap 12 serves as the inlet for the liquid to be filtered and the connector 14 on the first end cap 11 serves as the outlet for the filtrate.

Wherein each joint 14 comprises an extension 141 connected to the end of the housing 1 and a flange 142 at the end of the extension 141. And the thickness of the flange 142 of the tab 14 on the first end cap 11 and the tab 14 on the second end cap 12 are different, the difference between the thicknesses is between 1.5 and 2.5mm, i.e. the difference between H1 in fig. 2 and H2 in fig. 3 is between 1.5 and 2.5mm, for example H2 may be 1.5 to 2.5mm greater than H1. The two flanges 142 are sized to mate with corresponding mounting detents so that if the orientation of the two connectors 14 is reversed during installation of the capsule filter 100, they cannot be installed and thus act as a foolproof.

The end surface of the flange 142 is provided with an annular groove 143 for installing the sealing ring 2, the extension section 141 of each joint 14 is hollow to form a flow channel 144, the flow channel 144 and the annular groove 143 are separated by a first annular plane 145, namely, the first annular plane 145 is directly adjacent to the annular groove 143 and the sealing ring 2 and has a certain width, the first annular plane 145 corresponds to a cylindrical solid part with a certain width, so that the groove wall of the annular groove 143 close to the flow channel 144 can form a radial extrusion action with stronger strength on the sealing ring 2, and the sealing ring 2 is clamped in the annular groove 143 more firmly;

meanwhile, the width of the sealing ring 2 is 1.04-1.15 times of the width of the annular groove 143, and the thickness is 1.1-1.2 times of the depth of the annular groove 143, and the relative size design of the sealing ring 2 and the annular groove 143 ensures that the sealing ring 2 is firmly clamped in the annular groove 143 on the premise of ensuring the reliable tightness between the joint 14 and the mounting clamping groove, so that the sealing ring 2 is prevented from being clamped due to warping and partial rolling in the process of detaching the sealing ring from the clamping groove of the equipment by rotating the bag-type filter 100, and the joint 14 cannot be quickly unscrewed from the clamping groove.

In the capsule filter 100, by increasing the radial extrusion action of the inner side groove wall of the annular groove 143 on the sealing ring 2 and optimizing the relative sizes of the sealing ring 2 and the annular groove 143, the sealing ring 2 is firmly clamped in the annular groove 143 by combining the two actions, so that the sealing ring 2 can not warp or be partially rolled in the process of screwing out the capsule filter 100, and the joint 14 can be quickly screwed out.

In other preferred embodiments, as shown in fig. 2 and 3, the two end surfaces of the flange 142 are connected with the outer peripheral wall thereof in a transitional manner by a guiding surface 146, and the guiding surface 146 is a conical surface with an included angle a with the axial direction of 40-50 degrees, which makes the installation and removal of the capsule filter 100 more labor-saving, and especially the screwing operation of the flange 142 out of the clamping groove smoother and more labor-saving.

Preferably, the peripheral wall between the guide surfaces 146 of the two end surfaces of the flange 142 is a cylindrical wall 147, and the radial width D1 of the cylindrical wall 147 protruding from the outer wall of the extension 141 is 6-6.4mm, which ensures that the end of the flange 142 has a sufficient size for providing the annular groove 143 for mounting the sealing ring 2 of a suitable size, thereby ensuring the sealing between the flange 142 and the clamping groove, and simultaneously, the radial width of the flange 142 protruding from the extension 141 is as small as possible, which also facilitates the quick unscrewing of the joint 14.

In a further embodiment, shown in fig. 2 and 3, the guide surface 146 located at the end face of the flange 142 and the annular groove 143 are separated by a second annular plane 148, the second annular plane 148 having a width of 1.6-2mm, the second annular plane 148 being directly adjacent to the annular groove 143 and corresponding to a cylindrical solid portion having a radial width of 1.6-2mm, so that the groove wall of the annular groove 143 adjacent to the guide surface 146 also provides a sufficiently strong radial compression action on the sealing ring 2. That is, both the inner side and the outer side of the seal ring 2 in the annular groove 143 are radially pressed, so that the seal ring 2 can be more firmly caught in the annular groove 143, and the seal ring 2 is not warped or partially rolled up when the bag filter 100 is rotationally detached.

In other preferred embodiments, the first annular plane 145 and the second annular plane 148 are flush, the cylindrical solid portions corresponding to the first annular plane 145 and the second annular plane are balanced in extrusion action on the sealing ring 2, and the width of the first annular plane 145 is 2.5-3.5mm, that is, the cylindrical solid portion with the width of 2.5-3.5mm corresponding to the first annular plane 145, so that the radial extrusion action with sufficient strength on the sealing ring 2 can be formed by the groove wall of the annular groove 143 close to the flow channel 144, that is, the radial extrusion action with sufficient strength on the sealing ring 2 is formed by the cylindrical solid portions corresponding to the two annular planes respectively from the inner side and the outer side, so that the sealing ring 2 is firmly clamped in the annular groove 143, and the sealing ring 2 cannot warp or be partially rolled up when the capsule filter 100 is rotationally disassembled.

As shown in fig. 4 and 5, in this embodiment, the width D2 of the sealing ring 2 is 3.4-3.6mm, the thickness H3 is 3.3-3.6mm, and the sealing ring 2 with this size can provide a sufficient sealing surface and axial compression, so as to ensure the sealing assembly between the flange 142 and the externally provided clamping groove; meanwhile, before being extruded by the clamping groove, the volume of the part of the sealing ring 2 positioned in the annular groove 143 is also large enough, so that radial extrusion acting force generated on two sides of the sealing ring 2 by the groove wall of the annular groove 143 is sufficient, and the sealing ring 2 cannot warp or be partially rolled up when the bag filter 100 is rotationally disassembled.

As shown in fig. 6 and 7, a capsule filter 100 according to a second embodiment of the present application is provided, where a first end cap 11 of the capsule filter 100 has a bulge portion 15 protruding outward and communicating with a corresponding joint 14, and a mouthpiece 41 of a filter cartridge 4 is sealingly mounted in the bulge portion 15. The first end cap 11 is provided with an outwardly protruding bulge 15, which communicates with the corresponding adapter 14 for sealing the interface 41 for mounting the filter cartridge 4, which is suitable for customer sites where the first end cap 11 is mounted vertically downwards, since in this way no feed liquid remains inside the capsule filter 100, avoiding waste.

More specifically, the bulge 15 comprises a cylindrical section 151 and an annular plate 152 integrally formed at the end of the cylindrical section 151, the joint 14 of the first end cap 11 being integrally formed at a central hole 153 of the annular plate 152 and being a filtrate outlet for discharging filtrate, the interface 41 of the cartridge 4 being sealingly mounted in the cylindrical section 151 by means of a seal 42. The bulge 15 firmly seals the interface 41 of the filter element 4 through the cylindrical section 151 thereof and forms the joint 14 integrally and outwardly at the central hole 153 of the annular plate 152 thereof, i.e. the bulge 15 is integrally formed between the joint 14 and the outer surface of the first end cap 11, and the overall structure is simple, and the overall strength of the first end cap 11 can be maintained without excessively increasing the difficulty of manufacturing the first end cap 11.

As shown in fig. 8 and 9, the present application also provides a filtration system including a jig 3 and a capsule filter 100 (in the drawings, a filter cartridge 4 is not shown) as described in the above embodiments, the jig 3 including a main body 31 and two clamping portions 32 at both ends of the main body 31, each clamping portion 32 for supporting a joint 14 at both ends of the capsule filter 100 and having a fluid passage 33 communicable with both the joints 14. The fluid passage 33 may be shut off or in communication for connecting or disconnecting the capsule filter 100 to an external line. In the filtering system, the clamp 3 plays a role in fixing and supporting the capsule filter 100 and connects the capsule filter 100 with an external pipeline, and the operation of a user is more convenient.

Specifically, each clamp 32 includes an end block 34 provided with the fluid passage 33 described above and a tube bracket 35 for supporting the fitting 14 of the capsule filter 100, the tube bracket 35 having a U-shaped opening for receiving and holding the extension 141 of the fitting 14. The pipe bracket 35 is fixed to the side of the end block 34 facing the opposite end of the main body 31, and forms a clamping groove 36 with the end block 34 for clamping a flange 142 of the joint 14, and the difference of the widths of the clamping grooves 36 of the clamping parts 32 is 1.5-2.5mm, namely, the difference of D3 and D4 in FIG. 9 is 1.5-2.5mm. For example, D3 may be 1.5-2.5mm greater than D4. The clamping grooves 36 at the two ends of the clamp 3 have different widths and correspondingly match the flanges 142 with different thicknesses at the tail ends of the connectors 14 of the capsule filter 100, so that the clamping grooves have a foolproof effect when the capsule filter 100 is mounted on the clamp 3, and the reverse installation of the inlet and the outlet of the capsule filter 100 is avoided.

While the preferred embodiments of the present utility model have been described in detail, it will be appreciated that those skilled in the art, upon reading the above teachings, may make various changes and modifications to the utility model. Such equivalents are also intended to fall within the scope of the claims appended hereto.

Claims (10)

1. The utility model provides a bag filter, includes the shell and is fixed in the inside filter core of shell, the opposite both ends of shell respectively are equipped with a joint, its characterized in that: the connector comprises an extension section connected with the end part of the shell and flanges positioned at the tail end of the extension section, the flanges of the connectors are different in thickness, and the difference of the thicknesses of the flanges is 1.5-2.5 mm; the end face of the flange is provided with an annular groove for installing a sealing ring, the inside of each extending section of the joint is hollow to form a runner, the runner and the annular groove are separated by a first annular plane, the width of the sealing ring is 1.04-1.15 times of the width of the annular groove, and the thickness of the sealing ring is 1.1-1.2 times of the depth of the annular groove.

2. The capsule filter of claim 1, wherein the flange has two end surfaces in transitional engagement with the peripheral wall thereof by a guide surface, the guide surface being tapered at an angle of 40-50 ° to the axial direction.

3. A capsule filter according to claim 2, wherein the peripheral wall between the guide surfaces of the two end faces of the flange is a cylindrical wall having a radial width of 6-6.4mm protruding from the outer wall of the extension.

4. A capsule according to claim 2, wherein the guide surface at the end face of the flange and the annular groove are separated by a second annular plane, the second annular plane having a width of 1.6-2mm.

5. The capsule filter of claim 4, wherein the first and second annular planar surfaces are flush and the first annular planar surface has a width of 2.5-3.5mm.

6. The capsule filter of claim 1, wherein the housing includes a barrel and first and second end caps sealingly connected to opposite ends of the barrel, each of the connectors being provided to the first and second end caps, respectively, the first end cap having a bulge portion projecting outwardly and communicating with a corresponding connector, the interface of the filter cartridge being sealingly mounted within the bulge portion.

7. The capsule filter of claim 6, wherein the bulge comprises a cylindrical section and an annular plate integrally formed at the end of the cylindrical section, the joint of the first end cap is integrally formed at the central aperture of the annular plate and serves as a filtrate outlet, and the interface of the filter cartridge is sealingly mounted within the cylindrical section by a seal.

8. The capsule filter of claim 1, wherein the seal ring has a width of 3.4-3.6mm and a thickness of 3.3-3.6mm.

9. A filtration system comprising a clamp and a capsule filter according to any one of claims 1 to 8, the clamp comprising a main body and two clamping portions at opposite ends of the main body, the clamping portions being adapted to support connectors at opposite ends of the capsule filter and having fluid passages communicable with the connectors.

10. The filter system of claim 9, wherein each of the clamps includes an end block provided with the fluid passage and a tube holder for supporting a fitting of the capsule filter, the tube holder being fixed to a side of the end block facing the opposite end of the main body and forming a clamping groove with the end block for clamping a flange of the fitting, and a difference in width of the clamping groove of each clamp is between 1.5 and 2.5mm.

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