CN115970498A - Method for manufacturing stage type filter element - Google Patents
Method for manufacturing stage type filter element Download PDFInfo
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- CN115970498A CN115970498A CN202310062787.3A CN202310062787A CN115970498A CN 115970498 A CN115970498 A CN 115970498A CN 202310062787 A CN202310062787 A CN 202310062787A CN 115970498 A CN115970498 A CN 115970498A
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- 238000005520 cutting process Methods 0.000 claims abstract description 17
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Abstract
The invention provides a method for manufacturing a stage type filter element, which comprises the following steps: the stage type filter element comprises a central tube and an integral membrane, the integral membrane comprises an axial first end and an axial second end along the axial direction of the central tube, and the manufacturing method comprises the following steps: gluing, namely gluing between a first axial end and a second axial end of the integral membrane to form an intersegment separation glue line; a rolling step, wherein the integral membrane is rolled on the periphery of the central tube after the gluing step; a membrane repairing step, namely repairing the membrane of the integral membrane along the section separation glue line after the rolling step so as to separate the integral membrane into at least a first section of filter element and a second section of filter element in a stage type; and a cutting step, after the film trimming step, further moving the cutter towards the radial inner side to cut off the central tube, and connecting at least two sections of the cut central tubes through a connecting piece to form an interval. The diaphragm utilization rate can be improved, and the rejection rate of the diaphragm can be effectively reduced.
Description
Technical Field
The invention belongs to the technical field of water purification, and particularly relates to a method for manufacturing a stage type filter element.
Background
In the purifier, what play the core purification effect is the meticulous filter core that filters, including reverse osmosis membrane filter core and receive filter membrane filter core, its membrane aperture is little to nanometer, can filter the material such as inorganic salt, bacterium, impurity, organic matter, virus in the aquatic. The reverse osmosis membrane filter element and the nanofiltration membrane filter element are both roll-type filter elements and are fixedly wound on the central tube by the membrane through glue. The performance of the filter element is seriously influenced by the scaling of divalent ions in water, and the pure water rate and the flow of the filter element are reduced. In order to solve the problem, one method is to add a chemical scale inhibitor when the filter element is manufactured, and inhibit the generation of scale through chemical components, and the other method is to adopt a stage type filter element, connect two fine filtering filter elements in series, and use the concentrated water filtered by the former filter element as the raw water of the latter filter element, thereby improving the pure water rate of the filter element to a certain extent.
Through two filter cores series connection, can improve the high pure water rate to a certain extent, the unfavorable effect that follows is the volume increase of filter core, is unfavorable for the lightweight of clean drink machine, and the connection of two filter cores can increase the structure complexity of complete machine simultaneously, has all brought new challenge to the intensity and the cost control of filter core.
The design scheme of the existing filter element can not meet the requirements of better controlling the volume and the manufacturing cost of the filter element while improving the high-purity water rate.
The applicant of the invention applied 2022103018425 in the earlier stage, which adopts a mode of rolling a whole diaphragm by using a central pipe and adopts a film repairing process to divide the diaphragm into at least two diaphragms after gluing and rolling, compared with the sectional central pipe and the sectional diaphragm in the prior art, the diaphragm repairing method can effectively improve the film utilization rate, but needs to reserve a gap when repairing the diaphragm, so that the adhesive width needs to be occupied, the diaphragm repairing qualified rate is low, and the rejection rate of the diaphragm is high.
The invention provides a manufacturing method of a stage type filter element, which is researched and designed because the technical problems that the stage type filter element assembly in the prior art cannot improve the membrane utilization rate and can reduce the rejection rate of membranes and the like at the same time.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the stage type filter element assembly in the prior art cannot improve the membrane utilization rate and reduce the rejection rate of the membrane simultaneously, thereby providing a manufacturing method of the stage type filter element.
The invention provides a method for manufacturing a stage type filter element, which comprises the following steps:
the staged filter element includes a center tube and an integral membrane sheet, the integral membrane sheet includes an axial first end and an axial second end along the axial direction of the center tube,
the manufacturing method comprises the following steps: gluing, namely gluing between the axial first end and the axial second end of the integral membrane to form an inter-section separation glue line;
a rolling step, namely rolling the integral membrane on the periphery of the central pipe after the gluing step;
a membrane repairing step of repairing the integral membrane along the inter-segment separation glue line after the rolling step to separate the integral membrane into at least a first segment of filter element and a second segment of filter element in a segment type;
and a cutting step, after the membrane repairing step, further moving the cutter towards the radial inner side to cut off the central tube, and connecting at least two sections of the cut central tubes through a connecting piece to form an interval.
In some embodiments, further comprising: folding, namely folding the integral membrane to form two opposite front sides and two back sides which are opposite to each other before the gluing step, wherein a raw water flow channel is formed between the two opposite front sides, and a pure water flow channel is formed between the adjacent back sides;
in the step of gluing, the intersegment separating glue line is arranged on the back surface of the folded integral membrane so as to seal and separate pure water flow passages of at least two sections of filter elements; the first section of filter element comprises a first raw water flow channel formed between two opposite front surfaces of the first section of filter element and a first pure water flow channel positioned on the back surface of the first section of filter element, and the second section of filter element comprises a second raw water flow channel formed between two opposite front surfaces of the second section of filter element and a second pure water flow channel positioned on the back surface of the second section of filter element; the outlet of the first raw water flow passage is communicated with the inlet of the second raw water flow passage.
In some embodiments, in the folding step, the integral membrane sheet is folded to form a folded edge, a first long edge and a second long edge, and an open end, the folded edge is attached to the central tube for rolling, the first long edge is located at the axial first end, and the second long edge is located at the axial second end;
in the step of gluing, gluing is carried out so that one end of the inter-section separation glue line extends to be connected with the folded edge; forming a first filter element glue line on the back of the first section of filter element by gluing, and forming a second filter element glue line on the back of the second section of filter element by gluing;
in the step of repairing the membrane, cutting the inter-section separation glue line from the middle to form an inter-section separation glue line I positioned on the first section of filter element and an inter-section separation glue line II positioned on the second section of filter element; enabling the first pure water flow channel to be enclosed by the first filter element glue line and the first section separation glue line, and enabling the opening of the first pure water flow channel to face the folded edge; and the second pure water flow channel is enclosed by the second filter element glue line and the second section separation glue line, and the opening of the second pure water flow channel faces the folded edge.
In some embodiments, in the gluing step, the first filter element glue line includes a first filter element glue line and a second filter element glue line, the first filter element glue line is arranged at a position close to the first long side relative to the second long side, the second filter element glue line is arranged at a position close to the open end relative to the folded edge, the first filter element glue line extends from the folded edge to be connected with the second filter element glue line, and one end of the second filter element glue line is connected with the first filter element glue line and the other end of the second filter element glue line is connected with the first filter element glue line;
in the gluing step, the second filter element glue line comprises a first filter element glue line and a second filter element glue line through gluing, the first filter element glue line is arranged at a position close to the second long edge relative to the first long edge, the second filter element glue line is arranged at a position close to the opening end relative to the folded edge, the first filter element glue line extends from the folded edge to be connected with the second filter element glue line, one end of the second filter element glue line is connected with the first filter element glue line, and the other end of the second filter element glue line is connected with the second filter element glue line.
In some embodiments, in the gluing step, in a plane where the membrane is unfolded, the first filter element glue line, the first section separation glue line and the first filter element glue line are all arranged in parallel and are perpendicular to a central axis of the central tube, and the second filter element glue line are located on the same straight line and are parallel to the central axis of the central tube.
In some embodiments, a first pure water diversion hole and a second pure water diversion hole are formed in the central pipe, and both the first pure water diversion hole and the second pure water diversion hole penetrate from the outer wall to the inner wall of the central pipe;
in the rolling step, the first pure water diversion hole is opposite to the first section of filter core, the second pure water diversion hole is opposite to the second section of filter core, the first pure water flow passage is communicated with the first pure water diversion hole, and the second pure water flow passage is communicated with the second pure water diversion hole.
In some embodiments, in the gluing step, the width of the inter-segment separation glue line is controlled by gluing, so that the distance between the first pure water diversion hole and the second pure water diversion hole which are closest to each other in the axial direction of the central pipe is greater than or equal to 2 times the width of the inter-segment separation glue line.
In some embodiments, in the cutting step, the base pipe is cut to form at least first and second broken center pipe sections;
the manufacturing method further comprises a connecting step of arranging the connecting piece between the first central pipe section and the second central pipe section so that the first central pipe section and the second central pipe section are connected into a whole; the first central pipe section and the second central pipe section are arranged at intervals, the connecting piece comprises a connecting body and a protrusion, the protrusion is arranged on the outer peripheral wall of the connecting body and protrudes outwards, and the protrusion is clamped at the interval position between the first central pipe section and the second central pipe section.
In some embodiments, the connecting body is a cylindrical structure, the protrusion divides the connecting body into a first connecting body and a second connecting body, the first connecting body is located on one axial side of the protrusion, the second connecting body is located on the other axial side of the protrusion,
in the connecting step, the first connecting body is arranged in the first central pipe section in a penetrating mode, and the second connecting body is arranged in the second central pipe section in a penetrating mode.
In some embodiments, in the connecting step, after the connecting member is connected between the first central pipe section and the second central pipe section, a cavity is formed between the first filter element and the second filter element at an interval, and a water sealing member is disposed on an outer periphery of the cavity to seal the cavity.
The manufacturing method of the stage type filter element provided by the invention has the following beneficial effects:
according to the invention, the inter-section separation glue line is arranged between the axial first end and the axial second end of the membrane before the membrane rolling step, the membrane is cut into the first section of filter element and the second section of filter element along the separation glue line by the membrane repairing process after being rolled on the central tube, the central tube is further inwardly cut into at least two sections, and the two sections of central tube are connected through the connecting piece after being cut, so that an interval can be formed between the two sections of central tube, and an effective separation cavity can be effectively formed between the first section of filter element and the second section of filter element, so that raw water in the first section of filter element can enter the separation cavity after being filtered, and then enters the second section of filter element for filtering, and the effect of stage type filtering is effectively formed.
Drawings
FIG. 1 is a schematic view of the membrane unit construction of a staged cartridge of the invention;
fig. 2 is a structural view of a glue line arrangement of the stage type filter element in embodiment 1 of the present invention before film rolling;
FIG. 3 is a flow chart of the membrane repair (cutting) of the staged filter cartridge of example 1 after membrane rolling;
fig. 4 is a flow chart of a connection step in the method of manufacturing a stage type filter element according to embodiment 1 of the present invention;
FIG. 5 is a view showing the structure of a flow path inside a stage-type filter element according to example 1 of the present invention;
FIG. 6 is a structural view of a water seal member of a staged filter element according to example 1 of the present invention;
FIG. 7 is a structural view of a connecting member of a staged filter cartridge according to example 1 of the present invention;
FIG. 8 is a structural view of a segmented center tube (thread structure) of a segmented filter element of example 2 of the present invention;
FIG. 9 is a structural view of a threaded connector of the staged cartridge of example 2 of the present invention;
FIG. 10 is a coupling arrangement of a connector of a staged cartridge of example 3 of the invention;
fig. 11 is a structural view of a glue line arrangement of a stage type filter element in embodiment 4 of the present invention before film winding (3 stage type);
fig. 12 is a flow chart of a connection step in the method of manufacturing a stage type filter element according to embodiment 4 of the present invention.
The reference numbers in the figures denote:
1. a central tube; 11. a first pure water diversion hole; 12. a pure water diversion hole II; 13. a first center tube section; 14. a second central tube section; 15. a water-stop sheet; 16. tapping; 17. a third pure water diversion hole; 18. a pure water outlet; 2. an integral membrane; 21. a first section of filter element; 22. a second section of filter element; 23. an axial first end; 24. an axial second end; 25. folding edges; 26. an open end; 27. a front side; 28. a back side; 29. conducting pure water; 210. a third section of filter element; 3. glue lines; 31. the rubber lines are separated among the sections; 32. a filter element I is provided with a rubber wire I; 33. a filter element I and a filter element II are arranged in the filter element I; 34. the filter element II is provided with a first glue line; 35. a second filter element glue line; 36. a filter element three rubber lines; 4. a connecting member; 41. a connecting body; 42. a protrusion; 43. an external thread; 44. glue; 5. a cavity; 6. a water sealing member; 7. a filter flask body; 9. and (4) a water inlet grid.
Detailed Description
The invention provides an integrated roll-type membrane filter element with a stage type filtering function and a structure thereof. In the present invention, a filter element structure, a water path and a manufacturing method for realizing a first-stage two-stage function by a same central tube are mainly explained, specifically as follows:
fig. 5 is a water path schematic diagram of the stage-type filter element assembly, the inlet water of the filter element enters from the raw water port, enters into the inlet end face of the first section filter element 21 along the outer wall of the second section filter element 22 and the first section filter element 21, enters into the filter element from the end face to be purified, the pure water is collected and discharged through the central tube, the concentrated water of the first section filter element 21 is used as the inlet water of the second section filter element 22 and enters into the end face of the second section filter element 22 to be purified along the middle of the two sections of filter elements, the pure water is collected and discharged through the central tube, and the concentrated water is discharged through the concentrated water outlet.
As shown in fig. 1-12, the present invention provides a method of making a staged filter element, wherein:
the staged filter element comprises a central tube 1 and a monolithic membrane 2, wherein the monolithic membrane 2 comprises an axial first end 23 and an axial second end 24 along the axial direction of the central tube 1;
the manufacturing method comprises the following steps: a gluing step, gluing is carried out between the axial first end 23 and the axial second end 24 of the integral membrane 2 to form an intersegmental separation glue line 31;
a rolling step, wherein the integral membrane 2 is rolled on the periphery of the central tube 1 after the gluing step;
a membrane repairing step of repairing the membrane of the integrated membrane 2 along the inter-segment separation glue line 3 after the rolling step to separate the integrated membrane 2 into at least a first segment of filter element 21 and a second segment of filter element 22 in a segmented manner;
and a cutting step, after the membrane repairing step, further moving the cutter towards the radial inner side to cut off the central tube 1, and connecting at least two sections of the cut central tubes 1 through a connecting piece 4 to form an interval.
According to the invention, the inter-section separation glue line is arranged between the axial first end and the axial second end of the membrane before the membrane rolling step, the membrane is cut into the first section of filter element and the second section of filter element along the separation glue line by the membrane repairing process after being rolled on the central tube, the central tube is further inwardly cut into at least two sections, and the two sections of central tube are connected through the connecting piece after being cut, so that an interval can be formed between the two sections of central tube, and an effective separation cavity can be effectively formed between the first section of filter element and the second section of filter element, so that raw water in the first section of filter element can enter the separation cavity after being filtered, and then enters the second section of filter element for filtering, and the effect of stage type filtering is effectively formed.
In order to solve the problems of the scale inhibitor and the stage type filter element technology with a plurality of filter elements connected in series, the invention provides a stage type filtration roll-type membrane filter element structure which has a common central tube in a manufacturing stage and is connected into a whole after being manufactured.
The core invention points of the invention are that: the central tube is cut after being rolled, and the membrane is cut off and then integrally cut off, compared with the existing method that the central tube is not cut off, the method needs to reserve the space of the membrane to form a cavity between the filter elements, the area of the membrane is cut off excessively, the utilization rate of the membrane is low, and the condition that the membrane is scrapped due to the deviation of rolling often occurs; according to the invention, the diaphragm and the central tube are directly cut off, and a part of the diaphragm does not need to be cut off to form a cavity, so that the membrane area utilization rate is increased, the adaptability to the deflection of the coil is increased, and the rejection rate is reduced.
Compared with the prior patent, the invention only needs to punch a section separating glue line.
On the basis of the existing filter element manufacturing technology, the glue applying technology and the later-stage membrane repairing technology are combined, and the function that the same central tube has the first-stage two-section filter element filtering technology is successfully realized through the use of the connecting piece and the water sealing piece.
Has the beneficial effects that:
(1) Through the gluing process, the post-repairing process and the use of the connecting piece and the water sealing piece, the one-stage two-section type filter element filtering technology on the same central tube is realized, two filter elements can be connected in series in a single filter flask, the function of the one-stage two-section filtering technology is achieved, the integrated and light-weight design of the filter elements is realized, and the filter element filter has an important promotion effect on reducing the volumes of the filter elements and the whole machine;
(2) Compared with the filter core technology which realizes high recovery rate by using a scale inhibitor means, the stage type filter core technology has no problem of sanitation and safety caused by the release of scale inhibiting substances;
(3) Compared with a single filter element, the high water yield is realized by improving the recovery rate, the high water yield can be realized by controlling the relation between the flow and the recovery rate, and the service life of the filter element can be effectively prolonged;
(4) Compared with a single-stage filter element technology, the stage type filter element technology can improve the water yield of the filter element for purifying water;
(5) By using the technology, not only can a first-stage two-section type filter element be manufactured, but also a first-stage three-section type filter element can be derived, so that the connection of the three-section type filter elements is realized, the water yield of the filter element can be further improved, and the service life is prolonged;
the invention provides a method for manufacturing a stage type filter element, which comprises the following steps: on the basis of the manufacturing technology of the existing filter element, the glue applying technology and the later-stage membrane repairing technology are combined, and the connecting piece and the water sealing piece are used, so that the one-level two-section type filter element filtering technology of the same central tube is successfully realized. Compared with the traditional single-stage filter element filtering technology, the problem of filter element scaling is effectively solved, the service life is longer, and the water yield is higher. Meanwhile, due to the use of the connecting piece and the water sealing piece, the single-stage filter element can be transformed into the stage type filter element through simple steps, the cost is low, the process requirement degree is low, and the membrane almost has no loss.
The difference between the present invention and the earlier patents is mainly in the membrane repair stage and the filter cartridge functioning. When the membrane is repaired, a knife is used for cutting off the membrane and the central tube at the position of the two sections of filter element dividing glue lines, the two sections of filter elements are divided into two parts after the cutting off, and then a double-head connecting piece is used for connecting the two parts into a whole; when the membrane is repaired in the previous scheme, a gap needs to be cut around the two sections of filter element partition glue lines (two cutters are finished), the central tube is not cut off, and the two sections of filter elements are still on the same central tube after the membrane is repaired. Compared with the earlier stage scheme, the method has the advantages that gaps do not need to be reserved when the film is repaired, the glue width is not occupied, and the qualified rate of the repaired film can be improved.
In some embodiments, further comprising: a folding step, wherein before the gluing step, the integral membrane 2 is folded to form two opposite front sides and two back sides which are opposite to each other, a raw water flow channel is formed between the two opposite front sides, and a pure water flow channel is formed between the adjacent back sides;
in the step of gluing, the intersegment separation glue line 31 is arranged on the back of the folded integral membrane 2 so as to seal and separate pure water flow channels of at least two sections of filter elements; the first section of filter element 21 comprises a first raw water flow channel formed between two opposite front surfaces of the first section of filter element 21 and a first pure water flow channel positioned at the back surface of the first section of filter element 21, and the second section of filter element 22 comprises a second raw water flow channel formed between two opposite front surfaces of the second section of filter element 22 and a second pure water flow channel positioned at the back surface of the second section of filter element 22; the outlet of the first raw water flow passage is communicated with the inlet of the second raw water flow passage.
The invention relates to a preferable manufacturing method of at least two stage type filter elements formed by a membrane, and a preferable relation among pure water flow passages of the two stage type filter elements, a raw water flow passage and an intersegment separation glue line, namely, a first stage filter element and a second stage filter element are formed by cutting the intersegment separation glue line in the membrane repairing process, the intersegment separation glue line is used for cutting and dividing the position, and can effectively seal the first pure water flow passage and the second pure water flow passage respectively, namely, the remaining intersegment separation glue line after cutting can achieve the sealing effect, an outlet of the first raw water flow passage of the first stage filter element is communicated with an inlet of the second raw water flow passage of the second stage filter element, so that raw water enters the second flow passage again after being filtered by the first stage filter element for filtration and purification, the at least two stage type filter elements are formed, the water purification rate is improved, meanwhile, an interval cavity is formed between the two stage filter elements, and the flow rate of water can be improved through the interval cavity, thereby reducing scale generation, reducing concentration polarization and prolonging the service life of the filter elements.
On the basis of the existing filter element manufacturing technology, the invention combines the gluing technology and the post-stage membrane repairing technology with the use of the connecting piece and the water sealing piece, and successfully realizes that the same central tube has the one-stage two-section type filter element filtering technology.
A membrane unit. The membrane unit of the technical proposal uses a roll type membrane, and the membrane unit also comprises a water inlet grid 9 and a pure water guide cloth 29. Wherein, the fifty percent discount that staggers according to certain distance d1 is required to roll up formula diaphragm, and putting of different membrane pages also need stagger distance d2, and the concrete calculation of distance is: d1= d2= center tube outside diameter/membrane page count; the lowest membrane page is arranged close to the central tube, and the short edges of the two folded membrane pages are downward when the membrane pages are arranged, so that the utilization rate of the membranes is improved to the maximum extent; the folding direction of the membrane is that the separating layers are oppositely folded, a water inlet grid is arranged between the two folded separating layers, the water inlet grid is used for guiding water when the filter element runs, the filter element is prevented from being dried and the separating layers are mutually bonded together when the filter element is placed in a water-through mode, and the separating layers are damaged when water is fed again; and a pure water guide cloth is arranged between the back sides of the two folded membrane pages and is used for collecting pure water generated by the membrane pages during operation.
In some embodiments, in the folding step, the integral membrane sheet 2 is folded to form a folded edge 25, a first long edge and a second long edge, and an open end 26, the folded edge 25 is attached to the central tube 1 for rolling, the first long edge is located at the axial first end 23, and the second long edge is located at the axial second end 24;
in the step of gluing, gluing is carried out so that one end of the inter-section separation glue line 31 extends to be connected with the folded edge 25; forming a first filter element glue line on the back of the first filter element section 21 by gluing, and forming a second filter element glue line on the back of the second filter element section 22 by gluing;
in the step of repairing the membrane, the inter-segment separation glue line 31 is cut from the middle to form an inter-segment separation glue line I positioned on the first segment of filter element 21 and an inter-segment separation glue line II positioned on the second segment of filter element 22; making the first filter element glue line and the first segment separation glue line enclose the first pure water flow channel, and making the opening of the first pure water flow channel face the folded edge 25; and the second pure water flow passage is enclosed by the second filter element glue line and the second section separation glue line, and the opening of the second pure water flow passage faces the folded edge 25.
The membrane is preferably folded before being rolled and preferably cut after being rolled, and the folded edge formed by folding is attached to the central tube, so that raw water can enter a raw water flow channel on the front side of the membrane, permeate into a pure water flow channel on the back side through the membrane to form pure water, and enter the inside of the central tube at the folded edge; and the effect of dividing the gluey line between the section is not only used for cutting in order to cut apart first and second section filter core in this position here, can also be after the cutting on first and second section filter core remaining between the section separate gluey line one and the section separate gluey line two and seal first and second pure water runner respectively, and with the center tube water conservancy diversion of pure water towards hem department effectively, not only improved the membrane utilization ratio, the cutting of diaphragm area has been reduced, still guaranteed the effective sealing to two pure water runners, the adaptability to rolling up the circumstances such as the in-process book partially is stronger, the disability rate of diaphragm has been reduced.
In some embodiments, in the gluing step, the filter element-one glue line includes a filter element-one glue line one 32 and a filter element-one glue line two 33, the filter element-one glue line one 32 is disposed near the first long side relative to the second long side, the filter element-one glue line two 33 is disposed near the open end 26 relative to the flange 25, the filter element-one glue line one 32 extends from the flange 25 to meet the filter element-one glue line two 33, one end of the filter element-one glue line two 33 is connected to the filter element-one glue line one 32, and the other end is connected to the inter-segment separation glue line one;
in the gluing step, the second filter element glue line comprises a first filter element glue line 34 and a second filter element glue line 35 through gluing, the first filter element glue line 34 is arranged at a position close to the second long edge relative to the first long edge, the second filter element glue line 35 is arranged at a position close to the open end 26 relative to the folded edge 25, the first filter element glue line 34 extends from the folded edge 25 to be connected with the second filter element glue line 35, one end of the second filter element glue line 35 is connected with the first filter element glue line 34, and the other end of the second filter element glue line 35 is connected with the second filter element glue line.
The filter element I glue line on the first section of filter element and the filter element II glue line on the second section of filter element are in a preferred glue beating mode, the filter element I glue line I can extend in the long side direction of the first section of filter element and seal pure water, a raw water inlet is prevented from entering a first pure water flow channel, the filter element I glue line II can extend at the opening end of the first section of filter element and seal the pure water at the opening end, the pure water in the pure water flow channel is prevented from being mixed with the raw water outside the opening end, the filter element I glue line I, the filter element I glue line II and the inter-section separation glue line form a U-shaped sealing structure shown in figure 2, and water in the first pure water flow channel is effectively guided to the folding edge to enter a central tube; glue line one through filter core two and can extend and seal the pure water at the long limit direction of second section filter core, prevent that the pure water in the second pure water runner from flowing in the below, glue line two through filter core two and can extend and seal this department to the pure water at the opening end department of second section filter core, the pure water that prevents in the pure water runner mixes with the raw water in the open end outside, filter core two glues line one, filter core two glues line two and the intersegmental separation and glues the line constitution and seal structure like the U-shaped shown in figure 2, in order effectively to lead hem department with the water in the second pure water runner and get into in the center tube.
In some embodiments, in the gluing step, in a plane where the integrated membrane 2 is unfolded, the first filter element glue line 32, the first inter-segment separation glue line 31 and the first second filter element glue line 34 are all arranged in parallel and perpendicular to the central axis of the central tube 1, and the second first filter element glue line 33 and the second filter element glue line 35 are located on the same straight line and parallel to the central axis of the central tube 1. The filter element I glue line I, the section separation glue line I and the filter element II glue line I are preferably arranged in parallel, are connected from the folded edge and extend, can seal the inlet end of the first section of filter element, the space between the first section of filter element and the second section of filter element and the outlet section of the second section of filter element, are connected into a straight line and are parallel to the axis of the central tube, and can respectively seal the open ends of the first section of filter element and the second section of filter element with pure water.
The filter element I glue line I, the filter element I glue line II, the filter element II glue line I and the filter element II glue line II are preferably manufactured by gluing in an integrated manner, so that a U-shaped structure shown in figure 2 is formed, and effective sealing between a pure water flow passage and the outside is formed.
In some embodiments, the central tube 1 is provided with a first pure water diversion hole 11 and a second pure water diversion hole 12, and both the first pure water diversion hole 11 and the second pure water diversion hole 12 penetrate from the outer wall to the inner wall of the central tube 1;
in the rolling step, the first pure water diversion hole 11 is opposite to the first section of filter element 21, the second pure water diversion hole 12 is opposite to the second section of filter element 22, the first pure water flow passage is communicated with the first pure water diversion hole 11, and the second pure water flow passage is communicated with the second pure water diversion hole 12.
The central pipe is respectively provided with a first pure water diversion hole and a second pure water diversion hole which can be respectively communicated with the first pure water flow channel and the second pure water flow channel so as to lead pure water into the central pipe and integrally discharge the pure water to a required position in the central pipe.
In some embodiments, in the gluing step, the width of the inter-segment separation glue line 31 is controlled by gluing, so that the distance between the first pure water diversion hole 11 and the second pure water diversion hole 12 which are closest to each other in the axial direction of the central tube 1 is greater than or equal to 2 times the width of the inter-segment separation glue line 31. The distance between the pure water guide hole I and the pure water guide hole II which are closest to each other is more than 2 times larger than the width of the intersegment separation glue line, so that the pure water guide hole I and the pure water guide hole II can be respectively positioned at two sides of the intersegment separation glue line, the situation that pure water cannot be received due to the fact that the pure water guide holes are opposite to the intersegment separation glue line is avoided, the tightness of the pure water in the central pipe is guaranteed, and the pure water is prevented from leaking or being mixed with concentrated water and the like.
The filter element part of the invention comprises a central tube 1, a first section of filter element 21 and a second section of filter element 22 which are rolled on the central tube. The central tube 1 (see fig. 5) comprises a first pure water diversion hole 11 and a second pure water diversion hole 12, wherein the first pure water diversion hole 11 is mainly used for collecting pure water of a first section of filter element, the second pure water diversion hole 12 is mainly used for collecting pure water of a second section of filter element, the number of openings of the two parts of pure water diversion holes is more than or equal to 2, a certain distance is required between the adjacent openings of the first pure water diversion hole 11 and the second pure water diversion hole 12, and the distance is more than 2 times of the width of a separation glue line between sections; a water-stop sheet 15 for separating pure water from raw water; and a pure water outlet 18 for guiding out the collected pure water. The first section of filter element 21 covers the pure water diversion hole I11 of the central tube; and the second section of filter element 22 covers the second pure water diversion hole 12 of the central tube 1.
In some embodiments, in the cutting step, the base pipe 1 is cut to form at least a first central section 13 and a second central section 14 that are broken;
the manufacturing method further comprises a connecting step of arranging the connecting piece 4 between the first central pipe section 13 and the second central pipe section 14 so that the first central pipe section 13 and the second central pipe section 14 are connected into a whole; the first central pipe section 13 and the second central pipe section 14 are arranged at intervals, the connecting piece 4 comprises a connecting body 41 and a protrusion 42, the protrusion 42 is arranged on the outer peripheral wall of the connecting body 41 and protrudes outwards, and the protrusion 42 is clamped at the interval position between the first central pipe section 13 and the second central pipe section 14.
The connecting main body adopts the bulge structure to effectively separate the two sections of central pipe sections and form the spacing position, so that the two sections of filter elements rolled on the two sections of central pipe sections are also separated into the cavity, and the water flowing out of the first raw water channel firstly enters the cavity and then enters the second raw water channel, thereby improving the flow rate of the raw water, reducing concentration polarization, reducing water scaling and prolonging the service life of the filter elements.
In some embodiments, the connecting body 41 has a cylindrical structure, the protrusion 42 divides the connecting body 41 into a first connecting body and a second connecting body, the first connecting body is located on one axial side of the protrusion 42, and the second connecting body is located on the other axial side of the protrusion 42;
in the connecting step, the first connecting body is inserted into the first central pipe section 13, and the second connecting body is inserted into the second central pipe section 14.
Preferably, the protrusion 42 is a ring-shaped structure or a plurality of structures arranged at intervals on the outer circumferential wall of the connecting body 41, and the outer diameter of the protrusion 42 is flush with the outer diameter of the central tube 1.
The connecting body and the bulge are in a further preferred structural form and a preferred connecting mode, the bulge divides the connecting body into two parts, one part is inserted into the first central pipe section, and the other part is inserted into the second central pipe section, so that the bonding strength between the two central pipe sections is effectively improved; and protruding preferred is annular structure or a plurality of massive structures that set up at the circumference direction interval, and bellied external diameter and center tube external diameter parallel and level for be unlikely to make the arch cause the influence to the cavity part, guaranteed the promotion of raw water velocity of flow, improved the effect of preventing scale deposit.
The middle of the first section of filter element 21 and the second section of filter element 22 also comprises a double-end connecting piece (figure 4), which is mainly used for connecting the first section of filter element 21 and the second section of filter element 22 formed after membrane repair to form a whole again, and is an important part for realizing stage type filtering function for the two sections of filter elements. Specifically including the raised feature, the outer diameter of the raised portion is the same as the outer diameter of the center tube.
In some embodiments, in the connecting step, after the connecting member 4 is connected between the first central tube section 13 and the second central tube section 14, the first filter element 21 and the second filter element 22 are spaced to form a cavity 5, and a water sealing member 6 is disposed on the periphery of the cavity 5 to seal the cavity 5.
The first central pipe section and the second central pipe section are effectively separated through the bulge of the connecting body, so that a separated cavity is formed between the first section of filter element and the second section of filter element, raw water can enter the cavity first and then enter the second raw water flow channel, the flow rate of the raw water is improved, the scale formation effect is prevented, the service life of the filter element is prolonged, and the cavity can be effectively sealed through the water sealing piece.
And arranging a glue line. The invention relates to a stage type filter element technology realized on the same central pipe through gluing and film repairing, and a specific gluing mode is shown in figure 2. After the membrane is placed on the first membrane sheet in the manner mentioned in the membrane unit, gluing is performed according to fig. 2. Because the technical scheme is a stage type filter element technology and is a filter element integrated design, the first and second stage filter elements are respectively referred to as a first filter element and a second filter element for short. As can be seen from fig. 2, the glue lines of the first filter element section 21 and the second filter element section 22 are glued on the other three sides except that no glue is applied on the membrane close to the central tube; the first section of filter element 21 and the second section of filter element 22 are two separate and complete glue lines, the glue lines perpendicular to the central tube are not overlapped with the outer edge of the membrane, and a certain distance is required to be reserved for rolling the filter element, repairing the membrane after the glue is cured, so as to ensure the sealing property of the filter element; the width of the glue line of each filter element needs to be larger than the width of the corresponding filter element water guide opening to prevent the glue from blocking the water guide opening to influence water production; and each placed membrane needs to be glued according to the gluing mode shown in figure 2, the last membrane is glued and then rolled after being placed, so that the filter element is rolled into a cylinder, and the membrane repairing operation is carried out after the glue is cured.
And (5) repairing the film. In the technical scheme, the staged filter element technology is realized by arranging and repairing the membrane on the same central tube by means of the glue line, and the membrane repairing mode is specifically as follows. After the filter element is solidified, a corresponding membrane trimming blade is used for trimming the membrane, a specific mould trimming mode is shown in figure 3, a central tube which is not rolled is required to be taken before the mould trimming, the position of a blade of mould trimming equipment (not specifically explained) is adjusted, the blade 1, the blade 2 and the blade 3 are required to respectively correspond to the trimming position of the filter element, then the limit of the blade is adjusted, and the blade 1 and the blade 2 are required to cut off the membrane on the filter element without damaging the central tube. The blade 3 is required to cut the central tube, and therefore, the operation stroke of the blade 3 is required to completely cut the central tube. When the die repairing equipment is started to repair the film, the blade 1 and the blade 2 firstly work to repair the film at two ends of the filter element and remove the film with uneven edge, and then the blade 3 works to cut the filter element into two sections. The cut filter element is divided into a first section filter element 21 and a second section filter element 22. The concentrated water outlet end of the first section filter element 21 is also used as the raw water inlet end of the second section filter element 22, so that the first-stage two-section type filtration is realized.
The filter element is connected. The two sections of filter elements after membrane repair can be divided into a first section of filter element 21 and a second section of filter element 22, and the first section of filter element 21 and the second section of filter element 22 can be recombined into a filter element and a first-stage two-section filter element through the connecting action of the connecting piece and the water sealing piece. The specific connection mode is shown in fig. 4, in the first step, the connecting piece is firstly connected with the first section of filter element 21, then the water sealing piece 6 is installed, and finally the second section of filter element 22 is connected to assemble a complete first-stage two-section type filter element. The connecting piece, see fig. 7, two sealing rings are respectively arranged on two sides of the connecting piece and are matched with the central pipe to play a sealing role. The step in the middle of the connecting piece is used for limiting the positions of the two sections of filter cores and determining the spacing distance between the two sections of filter cores.
According to the technical scheme, the trimmed and assembled stage type filter element has different treatment modes, and in the technical scheme, the waterway principle of the stage type filter element is explained by taking the distribution of one end of an original water port, a thick water port and a pure water port as an example, and the waterway principle is specifically shown in figure 5. In order to realize the waterway separation and pressure maintaining, a water sealing piece is required to be added between the two sections of filter elements, and the water sealing piece is used for preventing the concentrated water of the second section of filter element 22 from being mixed with the raw water, so that the service life of the filter element and the water production efficiency are influenced. The water sealing part is shown in figure 7, 6 ribs are arranged on the outer side of the water sealing part, the strength of the water sealing part is increased, the water sealing part can be matched with the inner wall of the filter flask, the rigidity of the filter element is increased, the filter element is prevented from shaking in the filter flask, meanwhile, gaps among the ribs can allow raw water of the inlet of the filter element to pass through, the raw water reaches the bottom of the filter flask, and the water inlet section is arranged on the right side of the second section of the filter element 22. In order to ensure that the water sealing part can realize the function of water path separation, the two ends of the water sealing part can be simultaneously fixed with the first section filter element 21 and the second section filter element 22 by using adhesive tapes, so that the overall strength of the stage type filter element is increased. A second water sealing part (namely a filter element end cover) is arranged at the left side of the first section of the filter element 21, and in order to prevent the concentrated water of the first section of the filter element 21 from being mixed with the raw water, the sealing of the first section of the filter element and the filter element can be fixedly sealed in the form of an adhesive tape. According to the water route of fig. 5, the raw water of second section filter core 22 gets into to reach the filter flask bottom from the 6 rib clearances of water-sealing spare, the raw water section of intaking of second section filter core 22 promptly, the pure water is collected through the center tube guiding water hole, dense water then gets into in the space of first section filter core 21 and second section filter core 22, be the raw water of second section filter core 22 again under pressure drive, further filtration purifies, realize dense water reutilization, in order to promote the water yield of filter core, and is same, the pure water is collected through the guiding water hole of filter core, flow out from center tube pure water mouth after mixing with the pure water of second section filter core 22, dense water then flows out from dense water end.
The filter element obtained by the method for realizing the filter element gluing and membrane repairing treatment of the first-stage two-section stage filter element filtering technology on the same central tube has advantages in the aspects of safety, volume, performance and the like compared with other ways for realizing high water yield.
Example 2 was added. The above is one preferred embodiment of the present invention. In the connection mode of the two sections of filter elements, a threaded connection can also be used. That is, after the membrane repairing process is completed, the central tubes of the two sections of filter elements are subjected to a tapping operation, as shown in fig. 8 (the detailed operation is not described in detail). The connector used in this embodiment, see fig. 9, is a threaded connector with threads on both ends that mate with the threads of the center tube. The mounting mode is basically consistent with the scheme, and compared with the sealing mode using the sealing ring for sealing, the threaded connection has the advantages of lower possibility of leakage and higher connection strength.
Example 3 was appended. The two sections of filter elements are connected by glue joint. The connecting piece does not use a sealing ring or a threaded connection. The specific operation is shown in fig. 10. In this embodiment the connector is fixed to the first section of filter element 21 and the second section of filter element 22 by glue, respectively. Compared with the embodiment, the sealing ring sealing structure has the advantages that the sealing ring is not required to be used for sealing, tapping is not required, only partial glue is used, and the cost advantage is higher.
Example 4 was appended. A first-stage three-section type filter element filtering technology. The specific gluing mode is shown in fig. 11, the technical scheme is a three-section type filter element filtering technology, the 1-stage filter element, the 2-stage filter element and the 3-stage filter element are respectively called as a first-section filter element 21, a second-section filter element 22 and a third-section filter element 210, and compared with the gluing mode in fig. 2, four gluing lines perpendicular to the central tube need to be glued in the scheme. The specific manufacturing method of the filter element is shown in figure 12. In this embodiment, the connection of the 3 sections of filter elements may also use the threaded connection described in additional embodiment 2 and the gluing scheme in additional embodiment 3, which are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A manufacturing method of a stage type filter element is characterized by comprising the following steps:
the stage type filter element comprises a central tube (1) and an integral membrane (2), wherein the integral membrane (2) comprises an axial first end (23) and an axial second end (24) along the axial direction of the central tube (1);
the manufacturing method comprises the following steps: gluing, namely gluing between the axial first end (23) and the axial second end (24) of the integral membrane (2) to form an inter-section separation glue line (31);
a rolling step, wherein the integral membrane (2) is rolled on the periphery of the central tube (1) after the gluing step;
a membrane repairing step, in which the membrane of the integral membrane (2) is repaired along the inter-section separating glue line (3) after the rolling step, so that the integral membrane (2) is at least separated into a first section of filter element (21) and a second section of filter element (22) in a sectional type;
and a cutting step, after the membrane repairing step, further moving the cutter towards the radial inner side to cut off the central tube (1), and connecting at least two sections of cut central tubes (1) through a connecting piece (4) to form an interval.
2. The method of making a staged filter cartridge of claim 1, wherein:
further comprising: folding, namely folding the integral membrane (2) to form two opposite front sides and two back sides which are opposite to each other before the gluing step, wherein a raw water flow channel is formed between the two opposite front sides, and a pure water flow channel is formed between the adjacent back sides;
in the gluing step, the intersegment separation glue line (31) is arranged on the back surface of the folded integral membrane (2) so as to seal and separate pure water flow channels of at least two sections of filter elements; the first section of filter element (21) comprises a first raw water flow channel formed between two opposite front surfaces of the first section of filter element and a first pure water flow channel positioned on the back surface of the first section of filter element (21), and the second section of filter element (22) comprises a second raw water flow channel formed between two opposite front surfaces of the second section of filter element and a second pure water flow channel positioned on the back surface of the second section of filter element (22); the outlet of the first raw water flow passage is communicated with the inlet of the second raw water flow passage.
3. The method of making a staged filter cartridge of claim 2, wherein:
in the folding step, the integral membrane (2) is folded to form a folded edge (25), a first long edge, a second long edge and an opening end (26), the folded edge (25) is attached to the central tube (1) for rolling, the first long edge is located at the axial first end (23), and the second long edge is located at the axial second end (24);
in the gluing step, gluing is carried out so that one end of the inter-section separating glue line (31) extends to be connected with the folded edge (25); forming a first filter element glue line on the back of the first section of filter element (21) by gluing, and forming a second filter element glue line on the back of the second section of filter element (22) by gluing;
in the step of repairing the membrane, the inter-section separation glue line (31) is cut from the middle to form an inter-section separation glue line I positioned on the first section of filter element (21) and an inter-section separation glue line II positioned on the second section of filter element (22); enabling the first filter element glue line and the first section separation glue line to enclose the first pure water flow channel, and enabling the opening of the first pure water flow channel to face the folded edge (25); and the second pure water flow channel is surrounded by the second filter element glue line and the second section separation glue line, and the opening of the second pure water flow channel faces the folded edge (25).
4. The method of making a staged filter cartridge of claim 3, wherein:
in the gluing step, the first filter element glue line comprises a first filter element glue line (32) and a second filter element glue line (33) through gluing, the first filter element glue line (32) is arranged at a position close to the first long edge relative to the second long edge, the second filter element glue line (33) is arranged at a position close to the open end (26) relative to the folded edge (25), the first filter element glue line (32) extends from the folded edge (25) to be connected with the second filter element glue line (33), one end of the second filter element glue line (33) is connected with the first filter element glue line (32), and the other end of the second filter element glue line (33) is connected with the first filter element glue line;
in the gluing step, the second filter element glue line comprises a first filter element glue line (34) and a second filter element glue line (35) through gluing, the first filter element glue line (34) is arranged at a position close to the second long edge relative to the first long edge, the second filter element glue line (35) is arranged at a position close to the opening end (26) relative to the folded edge (25), the first filter element glue line (34) extends from the folded edge (25) to be connected with the second filter element glue line (35), one end of the second filter element glue line (35) is connected with the first filter element glue line (34), and the other end of the second filter element glue line (35) is connected with the second filter element glue line (34).
5. The method of making a staged filter element as defined in claim 4, wherein:
in the gluing step, in a plane where the integral membrane (2) is unfolded, the first filter element glue line (32), the inter-section separation glue line (31) and the first filter element glue line (34) are arranged in parallel and are perpendicular to the central axis of the central tube (1), and the second filter element glue line (33) and the second filter element glue line (35) are located on the same straight line and are parallel to the central axis of the central tube (1).
6. The method of making a staged filter element according to any one of claims 2-5, wherein:
the central pipe (1) is provided with a first pure water diversion hole (11) and a second pure water diversion hole (12), and the first pure water diversion hole (11) and the second pure water diversion hole (12) penetrate through the outer wall to the inner wall of the central pipe (1);
in the rolling step, the first pure water diversion hole (11) is opposite to the first section of filter element (21), the second pure water diversion hole (12) is opposite to the second section of filter element (22), the first pure water flow passage is communicated with the first pure water diversion hole (11), and the second pure water flow passage is communicated with the second pure water diversion hole (12).
7. The method of making a staged filter cartridge of claim 6, wherein:
in the gluing step, the width of the inter-section separation glue line (31) is controlled through gluing, so that the spacing distance between the pure water diversion hole I (11) and the pure water diversion hole II (12) which are closest to each other along the axis direction of the central pipe (1) is more than 2 times of the width of the inter-section separation glue line (31).
8. A method of making a staged filter element according to any one of claims 1 to 7, wherein:
in the cutting step, the central pipe (1) is cut into at least a first central pipe section (13) and a second central pipe section (14) which are disconnected;
the manufacturing method also comprises a connecting step of arranging the connecting piece (4) between the first central pipe section (13) and the second central pipe section (14) so that the first central pipe section (13) and the second central pipe section (14) are connected into a whole; the first central pipe section (13) and the second central pipe section (14) are arranged at intervals, the connecting piece (4) comprises a connecting body (41) and a protrusion (42), the protrusion (42) is arranged on the outer peripheral wall of the connecting body (41) and protrudes outwards, and the protrusion (42) is clamped at the interval position between the first central pipe section (13) and the second central pipe section (14).
9. The method of making a staged filter element as defined in claim 8, wherein:
the connecting main body (41) is of a cylindrical structure, the protrusion (42) divides the connecting main body (41) into a first connecting main body and a second connecting main body, the first connecting main body is positioned on one axial side of the protrusion (42), and the second connecting main body is positioned on the other axial side of the protrusion (42);
in the connecting step, the first connecting body is arranged in the first central pipe section (13) in a penetrating mode, and the second connecting body is arranged in the second central pipe section (14) in a penetrating mode.
10. The method of making a staged filter element as defined in claim 8, wherein:
in the connecting step, after the connecting piece (4) is connected between the first central pipe section (13) and the second central pipe section (14), a cavity (5) is formed between the first section of filter element (21) and the second section of filter element (22) at intervals, and a water sealing piece (61) is arranged on the periphery of the cavity (5) to seal the cavity (5).
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