CN114146570A - A kind of sealing device for hollow fiber membrane detection - Google Patents
A kind of sealing device for hollow fiber membrane detection Download PDFInfo
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- CN114146570A CN114146570A CN202111656354.8A CN202111656354A CN114146570A CN 114146570 A CN114146570 A CN 114146570A CN 202111656354 A CN202111656354 A CN 202111656354A CN 114146570 A CN114146570 A CN 114146570A
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- hollow fiber
- sealing
- sealing mechanism
- fiber membrane
- membrane
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- 238000007789 sealing Methods 0.000 title claims abstract description 92
- 239000012528 membrane Substances 0.000 title claims abstract description 81
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 54
- 239000013013 elastic material Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001471 micro-filtration Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920005594 polymer fiber Polymers 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/003—Membrane bonding or sealing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/04—Specific sealing means
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a sealing device for detecting a hollow fiber membrane, which comprises a shell, a sealing mechanism and a connecting mechanism, wherein the sealing mechanism is arranged in the shell and used for fixing the hollow fiber membrane to be detected; the connecting mechanism comprises a base connected with the lower end of the shell, and a needle tube arranged at the middle part of the base and communicated with the outside, wherein the other end of the needle tube penetrates through the sealing mechanism and is communicated with an inner hole of the hollow fiber membrane to be detected. The invention can be simply and rapidly installed, sealed and detected, saves the detection cost, greatly improves the detection speed, efficiency and accuracy of the film performance, ensures the detection timeliness and is beneficial to the management and control of the film product quality of a production line.
Description
Technical Field
The invention relates to the field of performance detection of polymer hollow fiber membranes, in particular to a sealing device for detecting a polymer hollow fiber membrane. The sealing device can be applied to the rapid sealing and detection of the performance of the hollow fiber membrane, and is particularly suitable for lining the hollow fiber composite membrane.
Background
With the rapid development of national economy and the continuous improvement of the living standard of people, the requirements on the environment, particularly the water environment safety, are higher and higher. In order to obtain more stable and higher effluent quality, membrane water treatment technology is increasingly adopted in sewage treatment and drinking water treatment processes, wherein hollow fiber ultra/micro filtration membranes are more and more widely applied, and lining reinforced hollow fiber composite membranes with higher mechanical strength and service life are rapidly developed by virtue of excellent performance of the lining reinforced hollow fiber composite membranes. With the continuous increase of the yield of the hollow fiber membrane, the quality of the membrane is strictly controlled in the production process, and higher requirements are provided for the rapid detection technology of the performance of the hollow fiber membrane. The faster the membrane performance is detected, the faster the quality control reaction in the production process is, and the more stable the performance and quality of the membrane is.
As shown in fig. 1, the lining hollow fiber composite membrane 5 is mainly composed of a braided tube or other types of support materials and a separation layer coated on the surface of the braided tube, and the two structural layers respectively play roles of strength support and separation. The separation layer is a filtration membrane having a microporous structure, and cannot pass through the membrane without pressurizing water. The inner braided tube or support layer is braided from polymer fibers with large interstices in which water can flow easily.
At present, in the field of rapid determination of the performance of a lining hollow fiber composite membrane (in the field, membrane filaments for short), for example, determination of membrane flux, membrane bubble point, etc., a needle tube is generally inserted into the inner circle of a membrane filament, and the membrane filament is tightly tied to a needle head by a string, so as to achieve the sealing effect. Because the internal braided tube holes have large gaps and large thickness (about 0.5-2 mm), the internal braided tube holes cannot be effectively sealed by adopting a binding method, and particularly, after detection and pressurization, water flows can flow out of the braided tubes at two ends of the membrane filaments, so that the membrane performance cannot be accurately obtained. To overcome this problem, sealing glues are used in the industry to bond the membrane to the test tube to obtain a good sealing effect. However, the glue needs a certain time for curing, so that the detection timeliness is affected, and the requirement of rapid detection of the film performance on a production line cannot be met. So far, the rapid detection of the lining hollow fiber composite membrane (membrane silk) always has the situation that the timeliness and the accuracy are difficult to be compatible. Therefore, the use of a simple and reliable sealing device to achieve rapid installation and sealing of membrane filaments has become increasingly important for producing reinforced hollow fiber microfiltration membranes of consistent quality.
Disclosure of Invention
The invention aims to solve the problem that the traditional hollow fiber membrane (membrane wire) rapid detection is difficult to take timeliness and accuracy into account, and provides a sealing device for hollow fiber membrane detection, which is simple and rapid to install and reliable in sealing.
The invention provides a sealing device for detecting a hollow fiber membrane, which comprises a shell, a sealing mechanism and a connecting mechanism, wherein the sealing mechanism is arranged in the shell and used for fixing the hollow fiber membrane to be detected; the connecting mechanism comprises a base connected with the lower end of the shell, and a needle tube arranged at the middle part of the base and communicated with the outside, wherein the other end of the needle tube penetrates through the sealing mechanism and is communicated with an inner hole of the hollow fiber membrane to be detected.
Preferably, the housing is of a tubular structure, the top of the housing is provided with a through hole for inserting the hollow fiber membrane to be tested into the sealing mechanism, and the inner circle of the lower end of the housing is provided with an internal thread connected with the base.
Preferably, the outer edge of the top of the shell is in one of a hexagon, a triangle, a pentagon or a circle.
Preferably, the sealing mechanism is a tubular body, a through hole at the top of the sealing mechanism is used for inserting the hollow fiber membrane to be tested, the lower end of the sealing mechanism is sealed by a sealing ring, and the middle part of the sealing ring is provided with a through hole for inserting the needle tube.
Preferably, the sealing mechanism is a tubular body, a through hole at the top of the sealing mechanism is used for inserting the hollow fiber membrane to be detected, the lower end face of the sealing mechanism is of a closed structure, and a through hole for inserting the needle tube is arranged in the middle of the lower end face.
Preferably, the outer circle of the base is provided with an external thread connected with the internal thread of the shell, when the base is screwed with the shell, the inner surface of the base abuts against the lower end of the sealing mechanism, and the needle tube is inserted into the inner circle of the hollow fiber membrane to be detected.
Preferably, the sealing mechanism is made of an elastic material.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts the sealing combination of machinery and a sealing ring, and a closed cavity is formed between the membrane wire to be detected and the sealing mechanism, so that liquid flowing out along the lower end of the membrane wire is remained in the closed cavity without leakage during detection. The sealing performance of the liquid in the closed cavity is ensured, so that the detection accuracy is ensured. The invention breaks through the limitation that the prior film yarn detection needs to use strings for binding or glue for cementation, omits the process of preparing samples for film yarn detection and saves the detection cost. The film performance detection device can be simply and quickly installed and sealed, greatly improves the film performance detection speed and efficiency, and is favorable for the management and control of the film product quality of a production line. Through screwed connection and fixed, the installation is simple quick, has ensured the ageing nature of detection.
Drawings
FIG. 1 is a schematic view of a structure of a lined hollow fiber composite membrane;
FIG. 2 is a schematic view of an installation structure of an embodiment of the sealing device of the present invention;
FIG. 3 is a schematic view of the water flow seal of the sealing device of the present invention;
FIG. 4 is a schematic view of the connection structure of FIG. 2;
FIG. 5 is a schematic view of the split seal mechanism of FIG. 2;
fig. 6 is a schematic view of the housing of fig. 2.
Detailed Description
The invention is further illustrated by the following examples and figures.
Fig. 2 shows an embodiment of a sealing device for detecting a hollow fiber membrane (membrane filament) provided by the present invention, which includes a housing 4 and a sealing mechanism disposed in the housing 4 and used for fixing a hollow fiber membrane 5 to be detected, in this embodiment, the membrane filament of the hollow fiber membrane 5 to be detected is a lining hollow fiber composite membrane, which is referred to as a membrane filament to be detected for short. There are also connection means for fixing the sealing means in the housing 4; the connecting mechanism comprises a base 1 connected with one end of a shell 4, a needle tube 11 arranged at the lower end of the middle part of the base 1 and communicated with the outside, and the upper end of the needle tube 11 penetrates into a sealing mechanism and is communicated with an inner hole of a membrane wire 5 to be tested.
In this embodiment, the casing 4 is a tubular structure, please refer to fig. 6, the top of which is provided with a through hole 41 for inserting the membrane wire 5 to be tested into the sealing mechanism, and the inner circle of the lower end is provided with an internal thread connected with the base 1 of the connecting mechanism. For convenience of installation, the outer edge of the top of the casing 4 is generally hexagonal, and the outer edge of the top of the casing 4 may be circular, triangular or pentagonal according to the needs of the installation place. Referring to fig. 5, the sealing mechanism is a tubular body 3, the top of which has an inner circular hole 31 for inserting the hollow fiber composite membrane 5 to be tested, and the lower end of which is sealed by a sealing ring 2. In this embodiment, the sealing mechanism is a split structure, that is, the tubular body 3 and the sealing ring 2 are separately manufactured, and the sealing ring 2 closes the lower port of the tubular body 3 to form an integral structure after installation. The center of the sealing ring 2 is provided with a through hole for inserting the needle tube 11. The sealing ring 2 is used for sealing between the base 1 and the tubular body 3 and is a key component for forming a closed space. In other embodiments, the sealing mechanism may also be of one-piece construction, i.e. the tubular body 3 and the sealing ring 2 are integrally formed. The top of the tubular body 3 is provided with a through hole 31 into which the membrane thread 5 to be measured is inserted, and the lower end surface thereof is provided with a through hole into which the needle tube 11 is inserted. The sealing mechanism may be made of an elastic material, such as plastic or rubber. Referring to fig. 4, the outer circle of the base 1 of the connection mechanism is provided with an external thread connected with the internal thread of the housing 4, and after the base 1 is screwed with the housing 4, the inner surface of the base 1 abuts against the lower end surface of the sealing mechanism, so that the sealing mechanism is fixed inside the housing 4, and the bottom end of the tubular body 3 can be tightly combined with the sealing ring 2 to form a closed cavity. And the through hole 41 on the top of the shell 4 corresponds to the through hole 31 on the top of the tubular body 3 of the sealing mechanism, so that the lower end of the membrane wire 5 to be tested is inserted into the sealing mechanism through the through hole 41 on the top of the shell 4 and the through hole 31 on the top of the tubular body 3. The hollow needle tube 11 arranged in the middle of the base is a channel for fluid for detection, the upper end of the hollow needle tube can be inserted into the inner circle at the lower end of the membrane wire 5 to be detected, and the lower end of the hollow needle tube can be communicated with pressure fluid input from the outside. According to the requirement, the connecting mechanism can also be connected with the testing pipeline of the membrane wire 5 to be tested by adopting various suitable connecting modes so as to introduce pressure liquid or pressure gas required by the test.
As shown in fig. 2, the tubular body 3 and the sealing ring 2 of the sealing mechanism are used for wrapping and sealing the lower section of the membrane wire 5 to be tested, that is, the inner circular surface of the upper part of the tubular body 3 is in close contact with the outer circular wall of the membrane wire 5 to be tested to form a mechanical seal, and the lower port of the tubular body 3 is in close contact with the sealing ring 2 to form a sealing surface, so that a closed space 32 is formed between the sealing mechanism and the membrane wire 5 to be tested to ensure the sealing effect of the insertion end of the membrane wire 5 to be tested. The sealing strength of the lower end of the tubular body 3 can be adjusted by the degree to which the housing 4 is screwed to the base 1. If the sealing mechanism is of an integrated structure, the sealing mechanism can be fixed in the housing 4 by screwing the housing 4 and the base 1.
When the detection is ready, as shown in fig. 2, the sealing ring 2 is sleeved on the needle tube 11 of the base 1, and the lower end of the sealing mechanism is flatly placed; the lower end of the membrane wire 5 to be measured sequentially penetrates into the shell 4 and the sealing mechanism, then the inner hole of the membrane wire 5 to be measured is sleeved into the outer wall of the needle tube 11, and the shell 4 is sleeved on the base 1 and screwed. Thus, the membrane wire 5 to be detected can be detected after being installed.
As shown in FIG. 3, the bottom needle tube 11 of the base 1 is connected with a water supply or air supply pipeline by a proper method in advance, and can be connected by a threaded connection, a slipknot connection and welding. According to the detection requirement, the upper end (outer end) of the membrane wire 5 to be detected can also be connected and sealed by adopting the sealing device of the invention, and can also be blocked by adopting other methods. When the water pump is started and pressure liquid is injected into the inner circle of the membrane wire 5 to be detected through the needle tube 11 of the base, the pressure liquid can flow downwards along the axial direction of the wall body material of the membrane wire 5 to be detected into the closed space 32 of the sealing mechanism, after the closed space is filled with the liquid, the detection liquid can permeate outwards through the circumferential wall body along the radial direction of the membrane wire 5 to be detected at normal speed, and then the performance of the membrane wire 5 to be detected can be detected, for example, parameters such as membrane flux and the like.
The invention can be simply and rapidly installed and sealed, saves the detection cost, greatly improves the detection speed, efficiency and accuracy of the film performance, ensures the detection timeliness and is beneficial to the management and control of the film product quality of a production line.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111656354.8A CN114146570A (en) | 2021-12-31 | 2021-12-31 | A kind of sealing device for hollow fiber membrane detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111656354.8A CN114146570A (en) | 2021-12-31 | 2021-12-31 | A kind of sealing device for hollow fiber membrane detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114146570A true CN114146570A (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111656354.8A Pending CN114146570A (en) | 2021-12-31 | 2021-12-31 | A kind of sealing device for hollow fiber membrane detection |
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| Country | Link |
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| CN (1) | CN114146570A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080110243A1 (en) * | 2006-11-14 | 2008-05-15 | Millipore Corporation | Rapid integrity testing of porous materials |
| JP2008253923A (en) * | 2007-04-05 | 2008-10-23 | Japan Organo Co Ltd | Condensate filter |
| CN102407078A (en) * | 2011-10-13 | 2012-04-11 | 天津工业大学 | A hollow fiber membrane filtration performance testing device |
| CN102728232A (en) * | 2012-06-13 | 2012-10-17 | 天津膜天膜科技股份有限公司 | A method for testing the pore size performance of hollow fiber membranes |
| US20130205873A1 (en) * | 2010-08-11 | 2013-08-15 | Gambro Lundia Ab | Device and process for testing hollow fibre membrane filters |
| CN204159231U (en) * | 2014-05-16 | 2015-02-18 | 天津海普尔膜科技有限公司 | Interior pressure-pipe type film film pipe leakage detection apparatus |
| CN208320502U (en) * | 2018-05-15 | 2019-01-04 | 四川久润环保科技有限公司 | A kind of hollow-fibre membrane transmission measurement device |
| CN216677753U (en) * | 2021-12-31 | 2022-06-07 | 深圳市君脉膜科技有限公司 | Sealing device for hollow fiber membrane detection |
-
2021
- 2021-12-31 CN CN202111656354.8A patent/CN114146570A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080110243A1 (en) * | 2006-11-14 | 2008-05-15 | Millipore Corporation | Rapid integrity testing of porous materials |
| JP2008253923A (en) * | 2007-04-05 | 2008-10-23 | Japan Organo Co Ltd | Condensate filter |
| US20130205873A1 (en) * | 2010-08-11 | 2013-08-15 | Gambro Lundia Ab | Device and process for testing hollow fibre membrane filters |
| CN102407078A (en) * | 2011-10-13 | 2012-04-11 | 天津工业大学 | A hollow fiber membrane filtration performance testing device |
| CN102728232A (en) * | 2012-06-13 | 2012-10-17 | 天津膜天膜科技股份有限公司 | A method for testing the pore size performance of hollow fiber membranes |
| CN204159231U (en) * | 2014-05-16 | 2015-02-18 | 天津海普尔膜科技有限公司 | Interior pressure-pipe type film film pipe leakage detection apparatus |
| CN208320502U (en) * | 2018-05-15 | 2019-01-04 | 四川久润环保科技有限公司 | A kind of hollow-fibre membrane transmission measurement device |
| CN216677753U (en) * | 2021-12-31 | 2022-06-07 | 深圳市君脉膜科技有限公司 | Sealing device for hollow fiber membrane detection |
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