CN220779323U - Filter and filtration system - Google Patents

Abstract

The utility model discloses a filter and a filter system, wherein the filter system comprises a joint matched with the filter, and the filter comprises: a housing having an open end and a filter cavity; the end cover is hermetically arranged at the opening end of the shell, and at least two through holes are formed in the end cover; the filter element is arranged in the filter cavity; the end cover is provided with a groove communicated with each through hole, and a sealing element is arranged in the groove; the sealing element outer wall is provided with a sealing part, the joint can internally squeeze the sealing element so that the joint and the sealing element form abutting sealing, and the sealing part can be deformed under pressure to form abutting sealing with the inner wall of the groove. The filter and the joint are matched with the primary seal without an O-shaped sealing ring, and the filter is realized through the abutting seal of the joint and the sealing piece and the abutting seal after the deformation of the sealing part, so that crushed aggregates generated by extruding the O-shaped sealing ring are prevented from polluting liquid.

Description

Filter and filtration system

Technical Field

The utility model belongs to the technical field of filtration, and particularly relates to a filter and a filtration system.

Background

The existing filter matched with the connector is generally in sealing connection with the filter by extruding an O-shaped sealing ring through a clamp. For example, JP4125051B2 discloses a filter in which a filter cartridge 20 is constituted by a main body 22 housing therein pleated other filter elements and a cover portion with a flange 24 closing the upper portion of the main body, and an inlet passage for primary-side fluid of the filter elements, an outlet passage for filtered secondary-side fluid, and an exhaust passage for primary or secondary-side passage are combined with an inlet pipe 29, an outlet pipe 28, and a ventilation pipe 30 provided in the cover portion. The joint block 10 is made of a metal such as stainless steel, a resin such as fluorocarbon or polyolefin, and has a mounting hole 102 having a constant diameter formed in the bottom thereof. The mounting hole 102 communicates with a fluid passage 100 connected to a passage of the pipe joint 11. The large-diameter base 108 of the metal or rigid plastic joint member 106 having the vertically extending internal passage 101 in the mounting hole 102 is fitted, and the mounting hole 102 is hermetically or liquid-tightly sealed with an O-ring 104 fitted around the base.

However, when a conventional filter is used for filtering a liquid (such as photoresist) for a semiconductor by combining a clamp and a joint, the liquid for the semiconductor has high requirement on cleanliness, the extrusion of the joint to the O-ring, particularly the extrusion excessively causes the O-ring to be extruded into particles so as to pollute the liquid for the semiconductor, and when the liquid is sealed by the compressed O-ring, the liquid contacts and soaks the compressed O-ring for a long time so as to dissolve out impurities and pollute the liquid.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a filter and a filtering system, wherein the primary sealing of the filter and the joint is realized by the abutting sealing of the joint and a sealing piece and the abutting sealing of the sealing part and the inner wall of a groove after deformation, so that crushed aggregates generated by extruding the O-shaped sealing ring are prevented from polluting liquid, and the cleanliness of the liquid is ensured.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a filter for a filtration system, the filtration system including a fitting for mating with the filter, the filter comprising:

a housing having an open end and a filter cavity;

the end cover is hermetically arranged at the opening end of the shell, and at least two through holes are formed in the end cover;

the filter element is arranged in the filter cavity, an annular channel for fluid to pass through is formed between the outer side wall of the filter element and the inner side wall of the shell, the top end of the filter element is connected with the inner surface of the end cover in a sealing way, one through hole is communicated with the annular channel, and the other through hole is communicated with the inside of the filter element;

the end cover is provided with a groove communicated with each through hole, and a sealing element is arranged in the groove;

the outer wall of the sealing element is provided with a sealing part, the joint can internally squeeze the sealing element so that the joint and the sealing element form an abutting seal, and the sealing part can be deformed under pressure to form an abutting seal with the inner wall of the groove;

the seal has fluid passages that communicate with the through-hole and the joint, respectively.

According to the filter provided by the utility model, the O-shaped sealing ring is not adopted as the primary sealing between the connector and the filter, the abutting sealing between the connector and the sealing element is realized through the axial extrusion between the connector and the sealing element, meanwhile, the sealing element is forced to deform by the sealing part supported by the inner wall of the groove, the deformed sealing part and the inner wall of the groove form abutting sealing, and the sealing element and the sealing part deform to form the abutting sealing process, so that impurities are hardly extruded out, and therefore, the liquid of the filter is basically decontaminated by the sealing element and the sealing part and the liquid purity is ensured while the connector and the filter through hole are communicated through the fluid channel. And after the sealing element is axially extruded, the sealing part arranged on the sealing element is directly stressed, and the sealing part is easy to deform and is in butt joint with the inner wall of the groove for sealing, so that the requirement on the axial extrusion force between the joint and the sealing element is reduced.

Preferably, the upper surface of the end cover is provided with an annular body surrounding each through hole, and the inner annular wall of the annular body and the upper surface of the end cover enclose the groove;

the sealing piece is provided with a sealing peripheral surface in the fluid channel, and the joint can extend into the fluid channel to be in abutting sealing with the sealing peripheral surface;

the fluid channel is provided with an opening on the lower end face of the sealing piece, the sealing part is integrally formed on the lower end face of the sealing piece and is positioned on the outer side of the opening, and the sealing part is provided with a connecting hole which is respectively communicated with the through hole and the opening.

So set up, connect and seal global sealed face that forms a week in succession, connect and seal with realizing the butt seal in fluid passage through extrusion seal global to the sealing part and the sealing part material of the terminal surface keep unanimous under the sealing part of integrated formation, after axial extrusion between sealing part and joint, the sealing part also directly accepts great axial pressure, the sealing part is more liable to take place to warp and carry out the butt seal with the end cover upper surface, thereby realize the butt seal to the sealing part warp, and the axial extrusion force between required sealing part and the joint is easy to reach, do not basically need too big axial extrusion force between sealing part and the joint, just can guarantee the effective butt seal between joint and the sealing part, the effective butt seal of sealing part and the end cover upper surface.

Preferably, the seal portion outer surface includes a first sealing surface disposed obliquely with respect to an axial direction of the seal member.

The inclined first sealing surface has a tendency of shrinkage or expansion, and the sealing part is easy to deform when the sealing part is pressed, so that the first sealing surface is bent to deform towards a horizontal plane or a vertical plane, and the deformed first sealing surface is in abutting sealing with the inner wall of the groove.

Preferably, the first sealing surface tapers in a direction along the seal to the end cap. That is, one end of the first sealing surface far away from the sealing element is close to the central axis of the connecting hole, so when the first sealing surface is deformed and bent, the distal end of the first sealing surface is close to the connecting hole, so that the first sealing surface is easily deformed from the distal end of the first sealing surface to drive the first sealing surface to bend and then to be in contact with the upper surface of the end cover for sealing.

Preferably, the first sealing surface is an arc surface or a conical surface. That is, when the seal portion is deformed by pressure, the circular arc surface or the conical surface is liable to be bent to form a circular arc surface which is sealed in abutment with the upper surface of the end cap.

Preferably, the outer surface of the sealing part further comprises a second sealing surface, the second sealing surface is formed at one end of the first sealing surface facing the end cover, and the second sealing surface is in surface contact with the upper surface of the end cover.

So set up, the second sealing face provides the sealing part and regards as the branch face when the compressive deformation, uses the second sealing face as the branch face when the sealing part is compressed, and the first sealing face of slope takes place to warp and also contacts with the end cover upper surface after crooked, and the continuous sealing face that first sealing face and second sealing face constitute is sealed with end cover upper surface butt to ensure the butt seal with between sealing part and the end cover upper surface, prevent that liquid from revealing in the gap department that both formed.

Preferably, the second sealing surface is a horizontal surface or an arc surface. The second sealing surface in a horizontal shape or an arc shape can provide a supporting surface with a large enough area, and under the premise that the second sealing surface is in sufficient contact with the upper surface of the end cover, when the sealing part is deformed under pressure, the first sealing surface is easy to deform and bend to be in butt joint with the upper surface of the end cover for sealing.

Preferably, a groove surrounding the sealing part is formed in the outer wall of the sealing piece, and the side wall of the groove is connected with the first sealing surface.

The groove connected with the first sealing surface has the effects that on one hand, the strength of the area connected with the sealing part on the sealing piece is reduced, so that one end of the sealing part connected with the sealing piece is easy to deform, the whole deformation degree of the first sealing surface is good, and the first sealing surface can form effective abutting sealing with the inner wall of the groove; on the other hand, the groove side wall of the groove deforms along with the first sealing surface, so that the deformation length of the first sealing surface is prolonged, the first sealing surface and the groove side wall of the groove are in contact with the upper surface of the end cover after being deformed, the sealing effect is good, and leakage is not easy to occur.

Preferably, a connection surface between the opening and the sealing peripheral surface is formed in the fluid passage, a supporting surface is formed between the connection surface and the inner side surface of the opening, and the end of the joint can press the supporting surface.

So set up, after joint and sealing peripheral face contact, joint and sealing member can further extrude, and the joint continues to stretch into downwards in fluid passage, and the holding surface can stop joint further excessive motion to the contact extrusion of two also can play auxiliary seal's effect, when guaranteeing joint and sealing peripheral face department butt seal, the extrusion force between joint and the sealing member reaches the biggest basically, thereby sealing portion deformation degree is great and can guarantee to seal with end cover upper surface butt.

Preferably, the sealing circumferential surface comprises a sealing circular arc surface and/or a sealing conical surface, and the sealing circular arc surface and the sealing conical surface can be in butt joint with the outer surface of the joint.

The sealing circular arc surface and/or the sealing conical surface are/is in butt joint with the extrusion force generated by the joint outer surface in a matched mode, component force exists in the axial direction and the radial direction, if the sealing part is arranged on the side wall of the sealing piece, the sealing part can be in butt joint with the side wall of the groove for sealing, the joint outer surface is easy to be in butt joint with the sealing circular arc surface and/or the sealing conical surface for sealing, and the requirement on the extrusion force between the joint and the sealing piece is low.

Preferably, the sealing peripheral surface comprises a sealing conical surface, the joint outer surface comprises an extrusion conical surface corresponding to the sealing conical surface, and the cone angle of the sealing conical surface is larger than that of the extrusion conical surface.

The joint can penetrate into the fluid channel, the sealing conical surface and the extrusion conical surface are in surface contact, the sealing conical surface and the extrusion conical surface form a superposition surface for abutting sealing, and the superposition surface can effectively realize abutting sealing of the joint and the sealing piece.

Preferably, the diameter of the connection hole is larger than the diameter of the through hole.

So set up, the tip that sealing member was kept away from to first sealed face begins to take place to warp, drives first sealed face and warp crooked, and the connecting hole inside wall will take place to warp, and this connecting hole inside wall can bulge towards the central axis direction, avoids the connecting hole inside wall protrusion after the bulge as far as possible in the through-hole inside wall, reduces the interference to the fluid in the through-hole, avoids influencing the fluid velocity of flow.

The utility model also provides a filter system comprising the filter as claimed in any one of the above, and a clamp for mounting and clamping the filter, the clamp comprising a fixing frame provided with at least two connectors and a support frame for supporting the filter, the connectors are arranged corresponding to the through holes, and the support frame can move up and down relative to the fixing frame so that the connectors can squeeze or separate from the sealing element.

So set up, the mount is used for carrying out fixed mounting, and the filter reciprocates along with the support frame, and the joint can extrude or break away from the sealing member, and the extrusion degree between joint and the sealing member is controlled through the distance that the support frame reciprocated, also ensures that the extrusion force between joint and the sealing member is enough to realize the connection seal of joint and filter.

The utility model has the beneficial effects that: the O-shaped sealing ring is not adopted between the joint and the filter as primary sealing, but the abutting sealing between the joint and the sealing member is realized through the axial extrusion between the joint and the sealing member, meanwhile, the sealing member is forced to deform by the sealing part carried by the inner wall of the groove, the deformed sealing part and the inner wall of the groove also form abutting sealing, the sealing member and the sealing part deform to form the abutting sealing process, and impurities are hardly extruded or dissolved out, so that the sealing member and the sealing part can not pollute the liquid of the filter basically when the joint and the filter are communicated in a sealing way, and the cleanliness of the liquid is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following brief description of the drawings of the embodiments will make it apparent that the drawings in the following description relate only to some embodiments of the present utility model and are not limiting of the present utility model.

FIG. 1 is a schematic three-dimensional structure of a filter according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic three-dimensional view of a first embodiment of a seal and seal provided by the present utility model;

FIG. 4 is a schematic cross-sectional view of FIG. 3;

FIG. 5 is a schematic three-dimensional view of a second embodiment of a seal and seal provided by the present utility model;

FIG. 6 is a schematic cross-sectional view of FIG. 5;

FIG. 7 is a schematic cross-sectional view of a third embodiment of a seal and seal provided by the present utility model;

FIG. 8 is a schematic cross-sectional view of a seal (with a groove) provided in an embodiment of the present utility model;

FIG. 9 is a schematic view, partially in section, of a fitting and end cap engagement provided by an embodiment of the present utility model;

FIG. 10 is a schematic three-dimensional structure of a filtration system according to an embodiment of the present utility model;

FIG. 11 is a schematic plan sectional view of FIG. 9;

fig. 12 is a schematic perspective sectional view of fig. 9.

Reference numerals:

1. a housing; 11. a filter chamber; 2. an end cap; 21. a through hole; 22. a groove; 23. an annular body; 3. a filter element; 4. a seal; 41. a fluid channel; 411. an opening; 42. a sealing peripheral surface; 421. sealing the conical surface; 422. sealing the cambered surface; 43. a connection surface; 44. a support surface; 5. a sealing part; 51. a connection hole; 52. a first sealing surface; 53. a second sealing surface; 54. a groove; 541. a groove sidewall; 6. a joint; 61. extruding the conical surface; 7. a clamp; 71. a fixing frame; 72. a support frame; 8. an O-shaped sealing ring; 9. an annular channel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the present utility model will be described in further detail with reference to the accompanying drawings. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Unless defined otherwise, technical or scientific terms used in this patent document should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used merely to denote relative positional relationships, which may be changed accordingly when the absolute position of the object being described is changed, merely to facilitate description of the present utility model and to simplify description, and not to indicate or imply that the apparatus or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. Features of the embodiments described below may be combined with each other without conflict.

Referring to fig. 1-2, embodiments of the present utility model provide a filter for use in a filtration system, and referring to fig. 10-12, the filtration system includes a fitting 6 for mating with the filter. The filter comprises: the housing 1 has an open end and a filter chamber 11, the open end not being shown in fig. 2, i.e. the upper end of the housing 1 shown in fig. 2, the housing 1 may be of cylindrical structure. It should be noted that the axial direction refers to the vertical direction in fig. 2, and the axial directions described later refer to the vertical direction.

An end cap 2 is sealingly mounted to the open end of the housing 1, and illustratively, the end cap 2 is welded to the open end of the housing 1 to close the filter cavity 11. At least two through holes 21 are formed in the end cover 2, and when the two through holes 21 are formed, liquid inlet holes and liquid outlet holes are formed respectively, preferably three through holes 21 are formed, and the liquid inlet holes, the liquid outlet holes and the air outlet holes are formed respectively.

The filter element 3 is installed in the filter cavity 11, and the filter element 3 can be an existing cylindrical porous filter element, and the porous filter element comprises a central rod and a filter medium, which are not described herein. An annular channel 9 for fluid to pass through is formed between the outer side wall of the filter element 3 and the inner side wall of the shell 1, and the annular channel 9 can be an upstream liquid distribution channel or a downstream filtrate channel.

The top end of the filter element 3 is connected with the inner surface of the end cover 2 in a sealing way, specifically, the filter element 3 is arranged in the filter cavity 11 from the opening end of the shell 1 and then welded with the end cover 2, or the filter element 2 and the end cover 2 are welded into a whole, and then the whole is arranged in the filter cavity 11 from the opening end of the shell 1 together.

One of the through holes 21 communicates with the annular channel 4, and the other through hole 21 communicates with the inside of the cartridge 3. When the through hole 21 communicated with the annular channel 4 is a liquid inlet hole and the through hole 21 communicated with the inside of the filter element 3 is a liquid outlet hole, the annular channel 4 is an upstream liquid distribution channel, and the inside of the filter element 3 is a filtrate channel; of course, the through hole 21 communicating with the inside of the filter element 3 may be a liquid inlet, and the through hole 21 communicating with the annular channel 4 is a liquid outlet.

The end cap 2 is provided with a groove 22 communicating with each through hole 21, and the groove 22 may be formed directly on the end cap 2 or may be formed by a ring body 23 described later, as long as the groove 22 with a groove wall is formed on the end cap 2. The sealing element 4 is arranged in the groove 22, the sealing element 4 can be in transition fit in the groove 22, and the sealing element 4 is made of a material with good cleanliness and certain hardness and deformability.

The sealing element 4 is preferably made of PTFE material, the PTFE sealing element 4 has proper deformability, the PTFE sealing element 4 is used for forming abutting sealing with the joint 6, the existing common rubber O-shaped sealing ring is not needed for extrusion sealing, impurities are difficult to dissolve out when the PTFE sealing element 4 abuts sealing, the cleanliness of the PTFE sealing element is high, when the filter is used for filtering liquid for semiconductors, the liquid contacts and soaks the PTFE sealing element for a long time, the PTFE sealing element is basically not dissolved to form impurities, and the pollution to the liquid is basically not caused.

Referring to fig. 3-9, the outer wall of the sealing member 4 is provided with a sealing portion 5, the joint 6 can press the sealing member 4, so that the joint 6 and the sealing member 4 form an abutting seal, and the sealing portion 5 can be deformed under pressure to form an abutting seal with the inner wall of the groove 22. The sealing portion 5 may be deformed and bent into an arc shape to seal against the inner wall of the groove 22. The abutting seal between the joint 6 and the seal 4 may be a face seal, or the abutting seal between the seal portion 5 and the inner wall of the groove 22 may be a face seal.

The sealing portion 5 may be integrally formed on the sealing member 4, and the sealing portion 5 is also preferably made of a PTFE material. The PTFE seal 5 may be formed on the bottom wall of the PTFE seal 4 so as to abut against the inner bottom wall of the groove 22 after being deformed by compression, or the PTFE seal 5 may be formed on the outer side wall of the PTFE seal 4 so as to abut against the inner side wall of the groove 22 after being deformed by compression.

The sealing member 4 has a fluid passage 41, the fluid passage 41 communicating with the through-hole 21 and the joint 6, respectively, so that there is a unique flow path between the joint 6 and the filter through-hole 21, i.e., fluid flows between the through-hole 21, the fluid passage 41 and the inside of the joint 6, without being substantially leaked to the outside of the filter by a gap between the sealing member 4 and the inner wall of the groove 22, or by a gap between the joint 6 and the sealing member 4.

When the filter is used, for example, the joint 6 and the filter can move towards each other, so that the joint 6 and the sealing element 4 can be in contact and pressed, the joint 6 applies force to the sealing element 4, so that the contact part of the sealing element 4 and the joint 6 is deformed to form abutting sealing, the sealing element 4 is stressed and then transmits force to the sealing part 5 to deform under pressure, and the deformed sealing part 5 and the inner wall of the groove 22 form abutting sealing.

It should also be noted that the benefit of providing the sealing portion 5 on the sealing member 4 is that, unlike providing the sealing portion 5 on the inner wall of the recess 22, the sealing portion 5 is able to directly receive pressure from the sealing member 4, so that the sealing portion 5 is easily deformed to achieve an abutment seal, the pressing force requirement on the sealing member 4 is reduced, and the deformed sealing portion 5 and the inner wall of the recess 22 do not effectively and well abut seal, and liquid does not substantially leak from between the deformed sealing portion 5 and the inner wall of the recess 22, because a large axial pressing force is required for the sealing member 4 to press-deform the sealing portion 5 to form an abutment seal with the inner wall of the recess 22, which is generally difficult to achieve by axial pressing of the joint 6 and the sealing member 4, provided that the sealing portion 5 is provided on the inner wall of the recess 22.

In a specific embodiment, referring to fig. 2, the upper surface of the end cap 2 is provided with an annular body 23 surrounding each through hole 21, and a groove 22 is defined by the inner annular wall of the annular body 23 and the upper surface of the end cap 2. The annular body 23 extends upward from the upper surface of the end cap 2, and the inner annular wall of the annular body 23 forms the inner side wall of the recess 22, and the upper surface of the end cap 2 forms the inner bottom wall of the recess 22.

The seal 4 has a seal peripheral surface 42 formed in the fluid passage 41, and the joint 6 can be inserted into the fluid passage 41 to be sealed in contact with the seal peripheral surface 42. The joint 6 is preferably sealed in a region where the joint 6 is continuous one-turn outside, because the joint 6 is preferably sealed by engagement between the outer surface of the joint 6 and the seal peripheral surface 42 and the contact between the outer surface of the joint 6 and the seal peripheral surface 42.

Referring to fig. 3 to 8, the fluid passage 41 is formed with an opening 411 at the lower end surface of the sealing member 4, and the sealing portion 5 is integrally formed at the lower end surface of the sealing member 4 and located outside the opening 411, and the sealing portion 5 has a connection hole 51 communicating with the through hole 31 and the opening 411, respectively. The joint 6 and the sealing element 4 are extruded along the axial direction basically, the stress direction of the lower end surface of the sealing element 4 is basically consistent with the extrusion force direction or kept close as much as possible, so that the stress of the lower end surface of the sealing element 4 is more direct and larger than that of the side wall, at the moment, the sealing part 5 integrated with the sealing element 4 is easy to deform along with the direct stress of the sealing element 4 so as to achieve abutting sealing with the upper surface of the end cover 2, and the sealing part 5 also provides a connecting hole 51 for fluid to pass through, so that the fluid passes through the through hole 31, the connecting hole 51 and the only flow path of the opening 411.

Furthermore, in other alternative embodiments, the sealing portion 5 may be disposed on an outer side wall of the sealing member 4, where the sealing portion 5 is annular and integrally formed on the outer side wall of the sealing member 4, and the sealing portion 5 is deformed under force and can form an abutting seal with an inner side wall of the groove 22.

Specifically, the sealing circumferential surface 42 includes a sealing circular arc surface 422 and/or a sealing conical surface 421, and the sealing circular arc surface 422 and the sealing conical surface 421 can be in abutting sealing with the outer surface of the joint 6. The sealing circumferential surface 42 may include only a sealing conical surface 421, and the outer side surface of the joint 6 is in abutting sealing with the sealing conical surface 421; the sealing circumferential surface 42 may only include a sealing circular arc surface 422, and the outer side surface of the joint 6 is in abutting sealing with the sealing circular arc surface 422; the sealing circumferential surface 42 may include a sealing conical surface 421 and a sealing cambered surface 422, and the outer side surface of the joint 6 performs abutting sealing on the sealing conical surface 421 and the sealing cambered surface 422, respectively.

In an alternative embodiment, the sealing peripheral surface 42 comprises a sealing cone 421 and the outer surface of the adapter 6 comprises a pressing cone 61 corresponding to the sealing cone 421, the cone angle of the sealing cone 421 being greater than the cone angle of the pressing cone 61. Because the taper angles between the sealing taper surface 421 and the pressing taper surface 61 are different, and the former is larger than the latter, the joint 6 is facilitated to extend into the fluid passage 41, the joint 6 moves downward in the fluid passage 41 until the two contact, the surface contact pressing is performed between the sealing taper surface 421 and the pressing taper surface 61, and the contact pressing coincident surface is used for abutting sealing.

In order to facilitate the compression deformation of the sealing portion 5 after being stressed, the outer surface of the sealing portion 5 includes a first sealing surface 52, and the first sealing surface 52 is disposed obliquely with respect to the axial direction of the sealing member 4. The inclined first sealing surface 52 has a tendency to contract or expand, the end of the first sealing surface 52 away from the sealing member 4 is the distal end of the first sealing surface 52, the distal end of the first sealing surface 52 is not connected with the sealing member 4, when the sealing member 5 is deformed under pressure, the inclined first sealing surface 52 is more easily deformed, and the surface of the inclined first sealing surface 52 is deformed from the distal end of the first sealing surface 52, so that the surface of the inclined first sealing surface 52 is deformed and bent to form an arc surface to be in abutting surface sealing with the inner bottom wall (the upper surface of the end cover 2) of the groove 23.

More specifically, the first sealing surface 52 tapers in the direction along the seal 4 to the end cap 2. That is, in cross section, the distance from the point on the first sealing surface 52 to the central axis of the seal member 4 is radial, and the radial distance from the point on the first sealing surface 52 to the central axis of the seal member 4 is gradually reduced in the direction along the seal member 4 to the end cap 2. And the distal end of the first sealing surface 52 is close to the connecting hole 51 and contacts the inner wall (such as the upper surface of the end cap 2) of the groove 22, so that the sealing portion 5 begins to deform after being stressed, and the distal end of the first sealing surface 52 is easy to drive the first sealing surface 52 to deform. Alternatively, the first sealing surface 52 is an arc surface or a conical surface, and the arc surface or the conical surface can form an arc surface sealed with the abutting surface of the upper surface of the end cover 2 after being deformed and bent.

Further, the outer surface of the sealing portion 5 further includes a second sealing surface 53, the second sealing surface 53 is formed at an end of the first sealing surface 52 facing the end cap 2, and the second sealing surface 53 is in surface contact with the upper surface of the end cap 2. The second sealing surface 53 is formed at the distal end of the first sealing surface 52 and is closer to the connecting hole 51 than the first sealing surface 52, and before the joint 6 is not in contact with and pressed against the sealing member 4, the second sealing surface 52 is brought into surface contact with the end cover 2 to provide support, thereby providing a supporting surface of the sealing member 4 when being deformed under force, and the second sealing surface 52 is also brought into surface contact with the upper surface of the end cover 2 after being deformed and deformed to form an abutting seal.

Specifically, the second sealing surface 53 is a horizontal surface or an arc surface. The horizontal direction refers to a direction perpendicular to the vertical direction in the drawing, where the horizontal is substantially horizontal. The second sealing surface 53 is in surface contact with the upper surface of the end cover 2 in a horizontal or circular arc shape, so that sufficient surface contact is provided between the second sealing surface 53 and the upper surface of the end cover 2, thereby the first sealing surface 52 is easy to deform and bend by being driven by the second sealing surface 53, in addition, the extrusion force of the sealing element 4 in the axial direction after being axially forced and extruded is basically vertical to the second sealing surface 53, and the second sealing surface 53 is directly pressed to drive the first sealing surface 52 to deform easily.

Thus, a specific configuration of several embodiments of the sealing portion 5 is provided, and referring to fig. 3-4, for a first embodiment of the sealing portion 5, the sealing portion 5 comprises a circular arc-shaped first sealing surface 52 and a horizontal second sealing surface 53. Referring to fig. 5-6, for a second embodiment of the seal 5, the seal 5 comprises only a conical first sealing surface 52. Referring to fig. 7, for a third embodiment of the sealing portion 5, the sealing portion 5 comprises a conical first sealing surface 52 and a horizontal second sealing surface 53.

In addition, referring to fig. 8, in the process that the sealing element 4 is deformed by the sealing portion 5 to abut against the inner wall of the groove 22, the requirement on the difficulty and degree of deformation of the sealing portion 5 is very important, the outer wall of the sealing element 4 is provided with a groove 54 surrounding the sealing portion 5, and the groove side wall 541 of the groove 54 is connected with the first sealing surface 52. The connection between the groove side wall 541 and the first sealing surface 52 means that the groove side wall 541 and the first sealing surface 52 are directly connected, that is, the end of the groove side wall 541 away from the end cover 2 is directly connected, and the groove side wall 541 and the first sealing surface 52 may be coplanar or may be disposed at an included angle. The groove 54 has the function of reducing the connection strength of the end of the sealing part 5 connected with the sealing element 4, and enabling the end of the sealing part 5 connected with the sealing element 4 to be easy to deform and good in overall deformation degree under the condition that the joint 6 applies the same extrusion force to the sealing element 4, so that the two ends of the first sealing surface 52 are easy to deform and good in overall deformation effect; on the other hand, extending the deformed length of the first sealing surface 52 corresponds to deforming the groove sidewall 541 along with the first sealing surface 52, and forming a long continuous sealing surface with the upper surface of the end cover 2 after deforming and bending.

For example, in the above-provided three seal portion 5 embodiments, the seal portion 5 is disposed on the lower end surface of the seal member 4, so that the groove 54 is disposed on the lower end surface of the seal member 4, the groove 54 may be located outside the seal portion 5, and the groove 54 is preferably annular. Of course, the groove 54 may also be located inside the sealing portion 5, in which case the first sealing surface 52 is enlarged in the direction of the seal 4 to the end cap 2. It can be seen that, in the embodiment in which the groove 54 is provided, the seal portion 5 has a fixed height in the axial direction, which is equivalent to the extension of the deformed length of the first seal surface 52, because the groove side wall 541 joined to the first seal surface 52 is deformed to some extent, the first seal surface 52 and the groove side wall 541 are deformed and bent together to have a substantially arc surface to be in contact with the upper surface of the end cap 2, and the degree of deformation and the contact effect are both good, so that leakage is unlikely to occur.

Further, a connection surface 43 is formed in the fluid passage 41 between the opening 411 and the seal peripheral surface 42, a support surface 44 is formed between the connection surface 43 and the inner side surface of the opening 411, and the end portion of the joint 6 can press the support surface 44. The joint 6 and the sealing member 4 can move further in opposite directions on the basis that the joint 6 extends into the fluid passage 41 to be in abutting sealing with the sealing peripheral surface 42, and the end part of the joint 6 abuts against the supporting surface 44 to play a role in assisting sealing. The support surface 44 is capable of stopping the downward excessive movement of the joint 6, the joint 6 presses the support surface 44, which means that the pressing of the joint 6 against the seal peripheral surface 42 is sufficient, and the pressed support surface 44 directly transmits the pressing force to the seal portion 5 to further secure the pressing deformation of the seal portion 5.

In addition, after the sealing portion 5 is deformed, the inner side wall of the connection hole 51 bulges toward the center thereof, the diameter of the connection hole 51 is larger than that of the through hole 31, the bulge of the inner side wall of the connection hole 51 in the inner side wall of the through hole 31 is avoided as much as possible, and the interference influence on the fluid in the through hole 31 is reduced.

In order to prevent the above-mentioned joint 6 from being in contact with the seal member 4 and failing due to insufficient extrusion force, the upper end surface of the seal member 4 is provided with an O-ring 8, the joint 6 can radially extrude the O-ring 8, the side wall of the groove 22 also radially extrudes the O-ring 8, the joint 6 can radially extrude the O-ring 8,O and the inner side wall of the groove 22 (the inner annular wall of the annular body 23) while axially extruding the seal member 4, and the O-ring seals the joint 6 and the inner side wall of the groove 22 extruded by the O-ring.

Referring to fig. 10-12, the present utility model further provides a filtration system comprising a filter as described in any one of the above, and a jig 7 for mounting the filter, the jig 7 comprising a fixing frame 71 to which at least two connectors 6 are mounted, and a supporting frame 72 for supporting the filter, the connectors 6 being disposed in correspondence with the through holes 21, the supporting frame 72 being movable up and down with respect to the fixing frame 71 so that the connectors 6 can be pressed against or separated from the sealing member 4.

The fixing frame 71 is used for fixing, the joint 6 is limited on the fixing frame 71, the joint 6 can be penetrated through the fixing frame 71 and can float a certain distance along the axial direction, and the distance of the joint 6 floating up and down is limited by a limiting part (not shown in the figure), or the joint 6 can be fixed on the fixing frame 71.

When the filter is used, the filter moves up and down along with the support frame 72 in the axial direction, the filter is close to or far away from the joint 6, after the sealing element 4 of the filter is in contact with the joint 6, the joint 6 can be in abutting sealing with the sealing element 4, the sealing element 4 is forced to deform under stress to form abutting sealing with the inner wall of the groove 22 of the filter, and a unique flow path is established between the through hole 21 of the filter and the joint 6, so that liquid or liquid can be fed or discharged to or discharged from the filter through the joint 6.

The present utility model is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (13)

1. A filter for a filtration system, the filtration system including a fitting for mating with the filter, the filter comprising:

a housing having an open end and a filter cavity;

the end cover is hermetically arranged at the opening end of the shell, and at least two through holes are formed in the end cover;

the filter element is arranged in the filter cavity, an annular channel for fluid to pass through is formed between the outer side wall of the filter element and the inner side wall of the shell, the top end of the filter element is connected with the inner surface of the end cover in a sealing way, one through hole is communicated with the annular channel, and the other through hole is communicated with the inside of the filter element; the method is characterized in that:

the end cover is provided with a groove communicated with each through hole, and a sealing element is arranged in the groove;

the outer wall of the sealing element is provided with a sealing part, the joint can internally squeeze the sealing element so that the joint and the sealing element form an abutting seal, and the sealing part can be deformed under pressure to form an abutting seal with the inner wall of the groove;

the seal has fluid passages that communicate with the through-hole and the joint, respectively.

2. A filter as claimed in claim 1, wherein: the upper surface of the end cover is provided with an annular body surrounding each through hole, and the inner annular wall of the annular body and the upper surface of the end cover enclose the groove;

the sealing piece is provided with a sealing peripheral surface in the fluid channel, and the joint can extend into the fluid channel to be in abutting sealing with the sealing peripheral surface;

the fluid channel is provided with an opening on the lower end face of the sealing piece, the sealing part is integrally formed on the lower end face of the sealing piece and is positioned on the outer side of the opening, and the sealing part is provided with a connecting hole which is respectively communicated with the through hole and the opening.

3. A filter according to claim 1 or 2, characterized in that: the seal portion outer surface includes a first sealing surface disposed obliquely with respect to an axial direction of the seal member.

4. A filter according to claim 3, wherein: the outer surface of the sealing part also comprises a second sealing surface, the second sealing surface is formed at one end of the first sealing surface facing the end cover, and the second sealing surface is in surface contact with the upper surface of the end cover.

5. A filter according to claim 3, wherein: and a groove surrounding the sealing part is formed in the outer wall of the sealing piece, and the side wall of the groove is connected with the first sealing surface.

6. A filter according to claim 3, wherein: the first sealing surface tapers in a direction along the seal to the end cap.

7. A filter according to claim 3, wherein: the first sealing surface is an arc surface or a conical surface.

8. A filter as defined in claim 4, wherein: the second sealing surface is a horizontal surface or an arc surface.

9. A filter as claimed in claim 2, wherein: the fluid channel is internally provided with a connecting surface between the opening and the sealing peripheral surface, a supporting surface is formed between the connecting surface and the inner side surface of the opening, and the end part of the joint can press the supporting surface.

10. A filter as claimed in claim 2, wherein: the sealing peripheral surface comprises a sealing circular arc surface and/or a sealing conical surface, and the sealing circular arc surface and the sealing conical surface can be in butt joint with the outer surface of the joint for sealing.

11. A filter as claimed in claim 10, wherein: the sealing peripheral surface comprises a sealing conical surface, the outer surface of the joint comprises an extrusion conical surface corresponding to the sealing conical surface, and the cone angle of the sealing conical surface is larger than that of the extrusion conical surface.

12. A filter as claimed in claim 2, wherein: the diameter of the connecting hole is larger than that of the through hole.

13. A filtration system, characterized by: a filter according to any one of claims 1 to 12, and a clamp for mounting and holding the filter, the clamp comprising a holder for mounting at least two connectors and a support for supporting the filter, the connectors being arranged in correspondence with the through holes, the support being movable up and down relative to the holder so that the connectors can be pressed against or released from the seal.