A head and ultrafiltration membrane element and a method for manufacturing an ultrafiltration membrane element

Abstract

The present invention provides a sealing head and an ultrafiltration membrane element and a method for manufacturing the ultrafiltration membrane element, wherein a sealing head is characterized in that: the sealing head comprises a hollow shell, and a sealing portion formed by curing glue is provided at one end of the shell. The present invention solves the problem of the prior art: how to achieve a simpler and more convenient sealing of one end of the shell; the problem of how to improve the hardness of one end of the shell while sealing; the problem of how to achieve the sealing of one end of the shell made of PP material.

Description

Technical Field

[0001] The present invention relates to the technical field of water purifiers, and in particular to a sealing head and an ultrafiltration membrane element and a method for manufacturing the ultrafiltration membrane element. Background Art

[0002] At present, the existing shell needs to be processed into a sealing component that meets the requirements of the shell, and then the sealing component and the shell are glued together to achieve the sealing effect on one end of the shell. This method has poor sealing effect and complex processing. How to achieve a simpler and more convenient sealing of one end of the shell has become a problem that needs to be solved.

[0003] Secondly, after one end of the existing shell is blocked, the hardness is often not high, which can easily cause deformation of one end of the shell and cause water leakage.

[0004] At the very least, the existing shells are generally made of ABS material (acrylonitrile-butadiene-styrene copolymer, which is a thermoplastic polymer structural material with high strength, good toughness and easy processing and molding, also known as ABS resin), which has a high cost. In order to save costs, pp material (generally referring to polypropylene) is needed to make the shell, but the adhesion between pp material and glue is poor. How to achieve the sealing of one end of the shell made of pp material becomes a problem that needs to be solved. Summary of the invention

[0005] The purpose of the present invention is to provide a head and an ultrafiltration membrane element and a method for manufacturing an ultrafiltration membrane element, mainly to solve the above-mentioned prior art problems: one is how to achieve a simpler and more convenient sealing of one end of the shell; the second is how to improve the hardness of one end of the shell while sealing; the third is how to achieve the sealing of one end of the shell made of PP material.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a head for a household filter element, characterized in that: the head includes a cylindrical hollow shell, and a sealing portion formed by curing glue is provided at one end of the shell.

[0007] Furthermore, the sealing portion includes an inner sealing portion for sealing the interior of one end of the shell and an outer glue layer located on the outer side surface of the end of the shell, and the inner sealing portion and the outer glue layer are connected.

[0008] Furthermore, a through hole is provided at one end of the shell, a first connecting portion formed by curing glue is provided in the through hole, and the inner sealing portion and the outer glue layer are connected via the first connecting portion.

[0009] Furthermore, an inner side wall at one end of the shell corresponding to the inner blocking portion is provided with a protruding portion and / or a threaded portion;

[0010] And / or an outer side wall at one end of the shell corresponding to the outer glue layer is provided with a protrusion and / or a threaded portion;

[0011] And / or the through holes are a plurality of circular through holes or elongated through holes.

[0012] Furthermore, the bottom end of the inner sealing portion is connected to the bottom end of the outer glue layer.

[0013] Furthermore, a through hole is provided at one end of the shell, a first connecting portion formed by curing glue is provided in the through hole, and the inner sealing portion and the outer glue layer are connected by the first connecting portion;

[0014] And / or the inner side wall of one end of the shell corresponding to the inner blocking portion is provided with a protruding portion and / or a threaded portion;

[0015] And / or an outer side wall at one end of the shell corresponding to the outer glue layer is provided with a protrusion and / or a threaded portion.

[0016] Furthermore, the inner sealing portion and the outer glue layer are solidified into one piece through the glue that permeates the shell.

[0017] An ultrafiltration membrane element comprises a shell and polysulfone hollow fibers, characterized in that one end of the shell is a sealing head of the above-mentioned household filter element; the sealing portion fixes the polysulfone hollow fibers in the shell, and the water outlet of the polysulfone hollow fibers is connected to the outside of the shell.

[0018] A method for manufacturing an ultrafiltration membrane element, which relates to the above-mentioned ultrafiltration membrane element, wherein the blocking portion comprises an inner blocking portion for blocking the interior of one end of a shell and an outer glue layer located on the outer side of the end of the shell, and the specific steps are as follows:

[0019] S1: Select a cylindrical hollow shell; or select a cylindrical hollow shell and process a through hole and / or a protrusion and / or a threaded portion at one end of the shell;

[0020] S2: fix the polysulfone hollow fiber in the shell, the water outlet of the polysulfone hollow fiber is flush with one end of the shell or the water outlet of the polysulfone hollow fiber extends out of one end of the shell, and then sleeve the auxiliary molding die with a bottom seal on one end of the shell, and the space between the inner side wall of the auxiliary molding die and the outer side wall of one end of the shell is used to form an outer glue layer;

[0021] S3: injecting glue into one end of the shell, and then centrifugally rotating the shell and the polysulfone hollow fiber together or applying pressure to the glue, so that part of the glue overflows from one end of the shell and forms an outer glue layer between the inner side wall of the auxiliary molding mold and the outer side wall of one end of the shell;

[0022] And / or glue is injected into one end of the shell, and then the shell and the polysulfone hollow fiber are centrifugally rotated together or pressure is applied to the glue, so that part of the glue overflows from one end of the shell through the through hole, and an outer glue layer is formed between the inner wall of the auxiliary molding mold and the outer wall of one end of the shell, and at this time, the inner sealing part and the outer glue layer both cover and tightly adhere to the through hole and / or the protrusion and / or the threaded part;

[0023] S4: After the glue solidifies to form a sealing portion consisting of an inner sealing portion and an outer glue layer, the solidified glue of the excess sealing portion is cut off or the excess portion formed by the excess shell, excess solidified glue and excess polysulfone hollow fiber is cut off, so that the water outlet of the polysulfone hollow fiber is connected to the outside of the shell.

[0024] An ultrafiltration membrane element includes a cylindrical hollow shell and polysulfone hollow fibers, characterized in that one end of the shell is sealed by a sealing portion formed by solidified glue, the sealing portion fixes the polysulfone hollow fiber inside one end of the shell, and the sealing portion is integrally fixed to the inner and outer side surfaces of the shell at this end.

[0025] In view of the above technical features, the present invention has the following advantages:

[0026] 1. A head of the present invention can realize a simpler and more convenient blocking of one end of the shell, and the head has diversified shapes and better sealing effect.

[0027] 2. A sealing head in the present invention can achieve the effect of sealing a shell made of a material with poor adhesiveness, such as sealing one end of a shell made of PP material.

[0028] 3. A head seal of the present invention wraps one end of the shell inside the seal portion by solidifying it and achieves sealing. After solidification, the seal portion can greatly improve the hardness of one end of the shell, improve the stability of product use, effectively avoid water leakage caused by deformation of one end of the shell, and improve customer comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a front view of the shell of a head in Example 1.

[0030] Figure 2 It is a shell cross-sectional view of a head in Example 1.

[0031] Figure 3 It is a schematic diagram of the structure of an ultrafiltration membrane element including a head in Example 2 (the outer shell is made of permeable material).

[0032] Figure 4 yes Figure 3 Cross-sectional view of the corresponding ultrafiltration membrane element.

[0033] Figure 5It is a front view of the shell of a head in Example 3 (the through hole is a circular hole).

[0034] Figure 6 yes Figure 5 Corresponding cross-sectional view of the housing.

[0035] Figure 7 It is a schematic diagram of the structure of an ultrafiltration membrane element including a head in Example 3 (the through hole is a circular hole).

[0036] Figure 8 yes Figure 7 A three-dimensional diagram of the corresponding ultrafiltration membrane element.

[0037] Fig. 9 It is a front view of the shell of another head in Example 3 (the through hole is a long strip through hole).

[0038] Fig.10 yes Fig. 9 Cross-sectional view of the corresponding housing.

[0039] Fig.11 yes Fig. 9 A perspective view of the corresponding housing.

[0040] Fig.12 It is a schematic diagram of the structure of an ultrafiltration membrane element including another type of head in Example 3 (the through hole is a long strip-shaped through hole).

[0041] Fig.13 yes Fig.12 A three-dimensional diagram of the corresponding ultrafiltration membrane element.

[0042] Fig.14 This is a schematic diagram of the structure of an ultrafiltration membrane element including another type of end cap in Example 3 (the through hole is a long strip through hole and there is a mounting groove in front of the through hole)

[0043] Fig.15 yes Fig.14 A three-dimensional diagram of the corresponding ultrafiltration membrane element.

[0044] Fig.16 It is a shell cross-sectional view of a head in Example 4 (inward protrusion).

[0045] Fig.17 It is a cross-sectional view of the ultrafiltration membrane element including the head in Example 4 (inward protrusion).

[0046] Fig.18 Shell cross-sectional view of another head in Example 4 (threaded portion)

[0047] Fig.19 A cross-sectional view (threaded portion) of an ultrafiltration membrane element including the other end cap in Example 4.

[0048] Fig. 20 It is a cross-sectional view of the auxiliary molding die in Example 5.

[0049] Fig.21 It is a schematic diagram of the matching of the auxiliary molding die and the shell in Example 5.

[0050] In the figure: 1, housing; 1-1, cut-out groove; 1-2, mounting groove;

[0051] 2. Through hole;

[0052] 3. protrusion;

[0053] 4. Threaded part

[0054] 5. Sealing part; 5-1. Inner sealing part; 5-2. Outer glue layer; 5-3. First connecting part;

[0055] 6. Membrane fiber (i.e. polysulfone hollow fiber); 6-1. Water outlet;

[0056] 7. Auxiliary molding mold; 7-1. Inner wall of the auxiliary molding mold. DETAILED DESCRIPTION

[0057] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0058] Refer to the figure 1 To Figure 2 , Specific embodiment 1, this embodiment 1 provides a head for a household filter element, characterized in that: the head includes a cylindrical hollow shell 1, and one end of the shell 1 is provided with a sealing portion 5 formed by curing glue.

[0059] The plugging portion 5 formed by the curing glue is directly sealed with the curing glue, and no other plastic accessories matching one end of the shell 1 are needed for bonding. In addition, the glue can be directly cured into a matching plugging portion 5 according to the shape and size of the shell 1. In other words, no matter what shape, size, or model of the hollow shell 1, the plugging portion 5 can be formed by curing the glue, and the plugging portion 5 can achieve the plugging and sealing effect of the corresponding shell 1 end. There is no need to process other plastic accessories separately, the process is simpler, and the cost is saved. The plugging portion 5 is bonded and fixed to the inner wall and the outer wall at one end of the shell 1.

[0060] The sealing part 5 includes an inner sealing part 5-1 for sealing the inside of one end of the housing 1 and an outer glue layer 5-2 located on the outer side of the end of the housing 1, and the inner sealing part 5-1 and the outer glue layer 5-2 are connected. The inner sealing part 5-1 and the outer glue layer 5-2 are both formed by cured glue.

[0061] That is to say, the plugging part 5 is actually divided into three parts, the inner plugging part 5-1, the outer glue layer 5-2 and the end of the shell 1 wrapped or covered by the inner plugging part 5-1 and the outer glue layer 5-2. This design can wrap one end of the shell 1 in the plugging part 5 to form a similar "integrated" design, so that while improving the plugging effect of one end of the shell 1 and increasing the sealing of one end of the shell 1, it can also greatly increase the hardness of one end of the shell 1 and increase the use stability of one end of the shell 1, that is, one end of the shell 1 is not easy to deform or deform under force, so that water leakage caused by deformation of one end of the shell 1 can be avoided, and thus the use stability is greatly improved.

[0062] The method for making a head of a household filter element in this embodiment 1 is as follows

[0063] S1: Select a cylindrical hollow shell 1;

[0064] S2: The auxiliary molding mold 7 with a bottom seal is sleeved on one end of the shell 1, and the space between the inner wall of the auxiliary molding mold 7 and the outer wall of one end of the shell 1 is used to form an outer glue layer 5-2; the auxiliary molding mold 7 here can be a hollow cylinder with one end open and the other end sealed. The inner diameter of the auxiliary molding mold 7 is larger than the outer diameter of one end of the shell 1, leaving space for forming the outer glue layer 5-2 (the space determines the thickness of the outer glue layer 5-2. During the processing, the inner wall of the auxiliary molding mold 7 is generally not in contact with the outer wall of one end of the shell 1, and a uniform distance or space is maintained between the two, so as to form an outer glue layer 5-2 with uniform thickness). Place one end of the shell 1 on the sealed bottom of the auxiliary molding mold 7, so that after the glue overflows, an inner sealing portion 5-1 and an outer glue layer 5-2 are formed inside one end of the shell 1.

[0065] S3: Inject glue into one end of the shell 1, then centrifugally rotate the shell 1 or apply pressure to the glue, so that part of the glue overflows from one end of the shell 1, and forms an outer glue layer 5-2 between the inner wall of the auxiliary molding mold 7 and the outer wall of one end of the shell 1; in order to ensure that the sealing part 5 has good sealing and sealing properties, a certain height or thickness of glue can be injected during the glue injection, which can help the cured sealing part 5 (including the inner sealing part 5-1 and the outer glue layer 5-2) to have a height or thickness.

[0066] There are many ways for the glue to overflow, which may be the gap between one end of the shell 1 and the sealed bottom of the auxiliary molding mold 7 or a hole or channel for the glue to overflow is provided at one end of the shell 1 itself.

[0067] S4: After the glue is cured to form a sealing portion 5 composed of the inner sealing portion 5-1 and the outer glue layer 5-2, the excess cured glue of the sealing portion 5 is cut off or the excess portion formed by the excess shell 1 and the excess cured glue is cut off.

[0068] The material of the shell 1 can be any one of stainless steel, aluminum alloy, PVC, PP, PVDF, PES, PC, ABS, AS, PS, etc.

[0069] The glue can be heat-resistant and melt-resistant glue, such as polyurethane glue and epoxy glue.

[0070] In order to accurately and quickly cut off the redundant part, a cutting groove 1 - 1 can be pre-set on the outer side of the shell 1 .

[0071] According to actual needs, a mounting groove 1 - 2 for mounting an O-ring can also be processed on the outer side surface of one end of the housing 1 .

[0072] In the sealing head of a household filter element in the present embodiment 1, the bottom end of the inner sealing part 5-1 is connected to the bottom end of the outer glue layer 5-2. Alternatively, the bottom end of the inner sealing part 5-1 and the bottom end of the outer glue layer 5-2 are not connected, the inner sealing part 5-1 is pasted and sealed to the inner side wall of one end of the shell 1, and the outer glue layer 5-2 is pasted to the outer side wall of one end of the shell 1, that is, the one end of the shell 1 is sealed, and the one end of the shell 1 is reinforced or the hardness of the one end of the shell 1 is improved, so as to improve the stability of the one end of the shell 1 in use.

[0073] If polysulfone hollow fibers 6 (also called "membrane fibers") are added to the housing 1, and the polysulfone hollow fibers 6 and the housing 1 are fixed as a composite integral unit via the sealing portion 5, an ultrafiltration membrane element is formed.

[0074] Specific embodiment 2, this embodiment 2 provides a head for a household filter element, and the difference between this embodiment 2 and embodiment 1 is that the inner sealing part 5-1 and the outer glue layer 5-2 are solidified into one through the glue that penetrates the shell 1.

[0075] At this time, the shell 1 is made of a material that can penetrate glue, such as PP cotton. In this way, one end of the shell 1 can penetrate glue, and the blocking part 5 is solidified into one piece by the inner blocking part 5-1, the outer glue layer 5-2, the glue that penetrates the shell 1, and the shell 1 (see the mark 8 in the attached figure), that is, the one end of the shell 1 itself is solidified into one piece with the blocking part 5, so that the blocking part 5 has a better blocking effect and better sealing performance for the one end of the shell 1, and the hardness of the one end of the shell 1 is also higher.

[0076] Specific embodiment 3, in this embodiment 3, a head for a household filter element is provided, and the difference between this embodiment 3 and the aforementioned embodiment is that: a through hole 2 is provided at one end of the shell 1, and a first connecting part 5-3 formed by curing glue is provided in the through hole 2, and the inner sealing part 5-1 and the outer glue layer 5-2 are connected by the first connecting part 5-3; such a design can strengthen the fixing force between the inner sealing part 5-1 and the outer glue layer 5-2, especially when the adhesion of the shell 1 itself is poor, this scheme can help the sealing part 5 to be stably sealed and fixed to one end of the shell 1, thereby ensuring the sealing and sealing effect of the sealing part 5 on one end of the shell 1.

[0077] The inner plugging portion 5-1, the outer glue layer 5-2, and the first connecting portion 5-3 in the through hole 2 for connecting the inner plugging portion 5-1 and the outer glue layer 5-2 are all from the same batch of glue and are simultaneously cured to form an integrated glue solidified product, which together with the corresponding portion of one end of the shell 1 wrapped by it forms the plugging portion 5. A plurality of through holes 2 can be provided, evenly distributed at one end of the shell 1, for evenly overflowing glue and evenly providing fixing force between the inner plugging portion 5-1 and the outer glue layer 5-2.

[0078] And / or the through holes 2 are a plurality of circular through holes (see Figure 5 , 6 , 7, 8) or long through holes (see Fig. 9 , 10 , 11, 12, 13), for example, taking four long strip through holes as an example, the long strip through hole design has the advantage that the glue can more easily overflow from the shell 1 through the long strip through hole 2 to the outside of the shell 1, and form an outer glue layer 5-2, the glue overflows faster, and the production efficiency is higher. It is also possible to set an installation groove 1-2 for installing an O-ring in front of the long strip through hole, see attached Fig.14 , 15 .

[0079] The difference between the manufacturing methods is: S1: select a cylindrical hollow shell 1 and process a through hole 2 at one end of the shell 1;

[0080] S3: Inject glue into one end of the shell 1, then centrifugally rotate the shell 1 or apply pressure to the glue, so that part of the glue overflows from one end of the shell 1 through the through hole 2, and forms an outer glue layer 5-2 between the inner wall of the auxiliary molding mold 7 and the outer wall of one end of the shell 1. At this time, the inner sealing part 5-1 and the outer glue layer 5-2 both cover and tightly adhere to the through hole 2.

[0081] When the shell 1 injected with glue is centrifugally rotated or pressure tested, the glue can also overflow from the through hole 2 and enter the space between the inner wall of the auxiliary molding mold 7 and the outer wall of one end of the shell 1 for forming the outer glue layer 5-2, thereby accelerating the overflow of the glue and improving production efficiency.

[0082] Specific embodiment 4, in this embodiment 4, a sealing head of a household filter element is provided, and the difference between this embodiment 4 and the previous embodiment is that: the inner side wall corresponding to the inner sealing portion 5-1 at one end of the housing 1 is provided with a protrusion 3 (see attached Fig.16 , 17 ) and / or threaded portion 4 (i.e. internal thread, see attached Fig.18 , 19 ); Of course, the inner sealing portion 5-1 and the outer glue layer 5-2 can also be formed by the through hole at the same time, or the inner sealing portion 5-1 and the outer glue layer 5-2 can be directly connected by the bottom of the two to form the sealing portion 5.

[0083] And / or the outer side wall of one end of the shell 1 corresponding to the outer glue layer 5-2 is provided with a protruding portion 3 and / or a threaded portion 4 (ie, an external thread).

[0084] Whether it is the protrusion 3 and / or the threaded portion 4 set on the inner wall or the outer wall at one end of the shell 1, they are all used to increase the friction between the sealing portion 5 and the inner wall and / or the outer wall of the shell 1, to prevent the sealing portion 5 and one end of the shell 1 from moving, sliding or falling off, so as to avoid affecting the blocking effect and / or sealing effect between the two; it can also indirectly increase the bonding strength between the sealing portion 5 and one end of the shell 1 by increasing the contact area.

[0085] Preferably, the design of the through hole 2 can be used in conjunction with the protrusion 3 and / or the threaded portion 4 in this embodiment 4, and the friction between the sealing portion 5 and one end of the shell 1 can be maximized in a variety of ways.

[0086] The difference between the manufacturing methods is: S1: select a cylindrical hollow shell 1, and process a through hole 2 and / or a protruding portion 3 and / or a threaded portion 4 at one end of the shell 1;

[0087] S3: Inject glue into one end of the shell 1, then centrifugally rotate the shell 1 or apply pressure to the glue, so that part of the glue overflows from one end of the shell 1 through the through hole 2, and forms an outer glue layer 5-2 between the inner wall of the auxiliary molding mold 7 and the outer wall of one end of the shell 1. At this time, the inner sealing part 5-1 and the outer glue layer 5-2 both cover and tightly adhere to the through hole 2.

[0088] Specific embodiment 5, this embodiment 5 provides an ultrafiltration membrane element, including a shell 1 and polysulfone hollow fibers 6 (also called "membrane fibers"), characterized in that: one end of the shell 1 is a head of a household filter element described in the above embodiment; the sealing portion 5 fixes the polysulfone hollow fibers 6 in the shell 1, and the water outlet portion 6-1 of the polysulfone hollow fibers 6 is connected to the outside of the shell 1. The sealing portion 5 includes an inner sealing portion 5-1 for sealing the interior of one end of the shell 1 and an outer glue layer 5-2 located on the outer side of the end of the shell 1. Figure 3 , 7 , 12, 17, 19.

[0089] The manufacturing method of an ultrafiltration membrane element (ultrafiltration membrane filter element) in this embodiment 5 comprises the following specific steps:

[0090] S1: Select a cylindrical hollow shell 1; or select a cylindrical hollow shell 1, and process a through hole 2 and / or a protruding portion 3 and / or a threaded portion 4 at one end of the shell 1;

[0091] S2: The polysulfone hollow fiber 6 is fixed in the shell 1, the water outlet portion 6-1 of the polysulfone hollow fiber 6 is flush with one end of the shell 1 or the water outlet portion 6-1 of the polysulfone hollow fiber 6 extends out of one end of the shell 1, and then the auxiliary molding mold 7 with a bottom seal is sleeved on one end of the shell 1, and the space between the inner side wall 7-1 of the auxiliary molding mold and the outer side wall of one end of the shell 1 is used to form the outer glue layer 5-2; taking the shell 1 with a long strip through hole 2 and the auxiliary molding mold 7 as an example, see Fig. 20 , 21 .

[0092] S3: Inject glue into one end of the shell 1, and then centrifuge the shell 1 and the polysulfone hollow fiber 6 together or apply pressure to the glue, so that part of the glue overflows from one end of the shell 1 and forms an outer glue layer 5-2 between the inner wall of the auxiliary molding mold 7 and the outer wall of one end of the shell 1;

[0093] And / or glue is injected into one end of the shell 1, and then the shell 1 and the polysulfone hollow fiber 6 are centrifugally rotated together or pressure is applied to the glue, so that part of the glue overflows from one end of the shell 1 through the through hole 2, and an outer glue layer 5-2 is formed between the inner wall of the auxiliary molding mold 7 and the outer wall of one end of the shell 1, at which time the inner sealing portion 5-1 and the outer glue layer 5-2 both cover and tightly adhere to the through hole 2 and / or the protrusion 3 and / or the threaded portion 4;

[0094] S4: After the glue solidifies to form a sealing portion 5 composed of an inner sealing portion 5-1 and an outer glue layer 5-2, cut off the excess solidified glue of the sealing portion 5 or cut off the excess part formed by the excess shell 1, excess solidified glue and excess polysulfone hollow fiber 6, so that the water outlet portion 6-1 of the polysulfone hollow fiber 6 is connected to the outside of the shell 1.

[0095] Specific embodiment 6, in this embodiment 6, an ultrafiltration membrane element is provided, including a cylindrical hollow shell 1 and a polysulfone hollow fiber 6, characterized in that: one end of the shell 1 is sealed by a sealing part 5 formed by solidified glue, and the sealing part 5 fixes the polysulfone hollow fiber 6 inside one end of the shell 1, and the sealing part 5 forms an integrated composite fixation with the inner and outer side surfaces of the end of the shell 1.

[0096] That is to say, the sealing part 5 simultaneously seals the inside of one end of the shell 1 and is also pasted to the outside of one end of the shell 1, so that the sealing part 5 and one end of the shell 1 form a whole (i.e., integrated). The sealing part 5 is used to seal one end of the shell 1 and fix the polysulfone hollow fiber 6 inside the shell 1, while also reinforcing and improving the overall hardness of one end of the shell 1. Therefore, it can be said that the sealing part 5 forms an integrated composite fixation with the inner and outer sides of this end of the shell 1.

[0097] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

[0098] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A head of a household filter element, characterized in that: The sealing head comprises a cylindrical hollow shell (1), and one end of the shell (1) is provided with a sealing portion (5) formed by curing glue; The sealing portion (5) comprises an inner sealing portion (5-1) for sealing the interior of one end of the shell (1) and an outer glue layer (5-2) located on the outer side surface of the end of the shell (1), and the inner sealing portion (5-1) and the outer glue layer (5-2) are connected; The shell (1) is made of a material that can be permeated with glue, and the inner sealing portion (5-1) and the outer glue layer (5-2) are solidified into one piece by the glue that has permeated the shell (1).

2. The sealing head of a household filter element according to claim 1, characterized in that: A through hole (2) is provided at one end of the shell (1), a first connecting portion (5-3) formed by curing glue is provided in the through hole (2), and the inner sealing portion (5-1) and the outer glue layer (5-2) are connected via the first connecting portion (5-3).

3. The sealing head of a household filter element according to claim 2, characterized in that: An inner side wall of one end of the shell (1) corresponding to the inner sealing portion (5-1) is provided with a protruding portion (3) and / or a threaded portion (4); And / or an outer side wall of one end of the shell (1) corresponding to the outer glue layer (5-2) is provided with a protruding portion (3) and / or a threaded portion (4); And / or the through holes are a plurality of circular through holes or elongated through holes.

4. The sealing head of a household filter element according to claim 1, characterized in that: The bottom end of the inner sealing portion (5-1) is connected to the bottom end of the outer glue layer (5-2).

5. The sealing head of a household filter element according to claim 4, characterized in that: A through hole (2) is provided at one end of the shell (1), a first connecting portion (5-3) formed by curing glue is provided in the through hole (2), and the inner sealing portion (5-1) and the outer glue layer (5-2) are connected via the first connecting portion (5-3); and / or an inner side wall of one end of the shell (1) corresponding to the inner sealing portion (5-1) is provided with a protruding portion (3) and / or a threaded portion (4); And / or an outer side wall of one end of the shell (1) corresponding to the outer glue layer (5-2) is provided with a protruding portion (3) and / or a threaded portion (4).

6. A household filter head according to any one of claims 1 to 5, characterized in that: The shell (1) is made of PP cotton.

7. An ultrafiltration membrane element, comprising a housing (1) and a polysulfone hollow fiber (6), characterized in that: One end of the shell (1) is a sealing head of a household filter element according to any one of claims 1 to 5; the sealing portion (5) fixes the polysulfone hollow fiber (6) in the shell (1), and the water outlet of the polysulfone hollow fiber (6) is connected to the outside of the shell (1); The outer side surface of the housing (1) is provided with a cut-out groove (1-1) and / or a mounting groove (1-2) for mounting an O-ring.

8. An ultrafiltration membrane element, comprising a housing (1) and a polysulfone hollow fiber (6), characterized in that: One end of the shell (1) is a sealing head of a household filter element as claimed in claim 6; the sealing portion (5) fixes the polysulfone hollow fiber (6) in the shell (1), and the water outlet of the polysulfone hollow fiber (6) is connected to the outside of the shell (1); The outer side surface of the housing (1) is provided with a cut-out groove (1-1) and / or a mounting groove (1-2) for mounting an O-ring.

9. A method for manufacturing an ultrafiltration membrane element, relating to an ultrafiltration membrane element according to claim 7 or 8, wherein the blocking portion (5) comprises an inner blocking portion (5-1) for blocking the interior of one end of the housing (1) and an outer glue layer (5-2) located on the outer side of the end of the housing (1), and the specific steps are as follows: S1: Select a cylindrical hollow shell (1); or select a cylindrical hollow shell (1) and process a through hole (2) and / or a protruding portion (3) and / or a threaded portion (4) at one end of the shell (1); S2: fix the polysulfone hollow fiber (6) in the shell (1), the water outlet portion (6-1) of the polysulfone hollow fiber (6) is flush with one end of the shell (1) or the water outlet portion (6-1) of the polysulfone hollow fiber (6) extends out of one end of the shell (1), and then sleeve the auxiliary molding mold (7) with a bottom seal on one end of the shell (1), and the space between the inner side wall of the auxiliary molding mold (7) and the outer side wall of one end of the shell (1) is used to form the outer glue layer (5-2); S3: injecting glue into one end of the shell (1), and then centrifugally rotating the shell (1) and the polysulfone hollow fiber (6) together or applying pressure to the glue, so that part of the glue overflows from one end of the shell (1) and forms an outer glue layer (5-2) between the inner wall of the auxiliary molding mold (7) and the outer wall of one end of the shell (1); and / or injecting glue into one end of the shell (1), and then centrifugally rotating the shell (1) and the polysulfone hollow fiber (6) together or applying pressure to the glue, so that part of the glue overflows from one end of the shell (1) through the through hole (2) and forms an outer glue layer (5-2) between the inner wall of the auxiliary molding die (7) and the outer wall of one end of the shell (1), and at this time, the inner sealing portion (5-1) and the outer glue layer (5-2) both cover and tightly adhere to the through hole (2) and / or the protruding portion (3) and / or the threaded portion (4); S4: After the glue is solidified to form a sealing portion (5) composed of an inner sealing portion (5-1) and an outer glue layer (5-2), the excess solidified glue of the sealing portion (5) is cut off along the cutting groove (1-1) or the excess portion formed by the excess shell (1), the excess solidified glue and the excess polysulfone hollow fiber (6) is cut off, so that the water outlet portion (6-1) of the polysulfone hollow fiber (6) is connected to the outside of the shell (1).

10. An ultrafiltration membrane element, comprising a cylindrical hollow shell (1) and a polysulfone hollow fiber (6), characterized in that: The shell (1) is made of PP cotton; one end of the shell (1) is sealed by a sealing portion (5) formed by curing glue that penetrates the shell (1); the sealing portion (5) fixes the polysulfone hollow fiber (6) inside one end of the shell (1); the sealing portion (5) forms an integral composite fixation with the inner and outer side surfaces of the end of the shell (1).

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