CN115970498B - Manufacturing method of stage type filter element - Google Patents
Manufacturing method of stage type filter element Download PDFInfo
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- CN115970498B CN115970498B CN202310062787.3A CN202310062787A CN115970498B CN 115970498 B CN115970498 B CN 115970498B CN 202310062787 A CN202310062787 A CN 202310062787A CN 115970498 B CN115970498 B CN 115970498B
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Abstract
The invention provides a manufacturing method of a stage type filter element, which comprises the following steps: the stage filter element comprises a central tube and an integral membrane, wherein 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: a gluing step, namely gluing between the axial first end and the axial second end of the integral membrane to form a section-to-section separation glue line; a rolling step, namely rolling the whole membrane on the periphery of the central tube after the gluing step; a membrane repairing step, namely repairing the whole membrane along a section separation glue line after the rolling step to separate the whole membrane into at least a first section filter element and a second section filter element of a stage type; and a cutting step, after the film repairing step, the cutter is further moved towards the radial inner side to cut off the central tube, and at least two sections of the cut central tubes are connected through a connecting piece to form a space. The invention can improve the utilization rate of the membrane and simultaneously can effectively reduce the rejection rate of the membrane.
Description
Technical Field
The invention belongs to the technical field of water purification, and particularly relates to a manufacturing method of a stage type filter element.
Background
In the water purifier, the fine filter element has the core purification function, comprises a reverse osmosis membrane filter element and a nanofiltration membrane filter element, has the membrane aperture as small as nano-scale, and can filter inorganic salt, bacteria, impurities, organic matters, viruses and other substances in water. The reverse osmosis membrane filter element and the nanofiltration membrane filter element are both coiled filter elements, and the membrane is fixedly coiled on the central tube through glue. The divalent ion scaling in water can seriously affect the performance of the filter element, and reduce the pure water rate and flow rate of the filter element. In order to solve the problem, one method is to add a chemical scale inhibitor during the manufacture of the filter element, and inhibit scale generation through chemical components, and the other method is to adopt a stage filter element, connect two fine filter elements in series, and use concentrated water filtered by the former filter element as raw water of the latter filter element, so that the pure water rate of the filter element can be improved to a certain extent.
The water purification rate can be improved to a certain extent by connecting the two filter elements in series, the follow-up unfavorable effect is that the volume of the filter elements is increased, the light weight of the water purifying and drinking machine is unfavorable, meanwhile, the structural complexity of the whole machine can be increased by connecting the two filter elements, and new challenges are brought to the strength and cost control of the filter elements.
The design scheme of the existing filter element can not meet the requirement of better control of the volume and manufacturing cost of the filter element while improving the pure water rate.
The applicant of the present invention filed 2022103018425 a patent earlier, which adopts a mode of rolling a whole membrane by a central tube, adopts a membrane repairing process to divide the membrane into at least two membranes after film making, and can effectively improve the membrane utilization rate compared with the sectional central tube and sectional membrane in the prior art, but the membrane repairing process needs to reserve a gap, so that the membrane repairing process needs to occupy a wide space, and has the condition of low membrane repairing qualification rate, so that the condition of higher membrane rejection rate occurs.
The invention designs a manufacturing method of a stage type filter element because the stage type filter element component in the prior art has the technical problems that the membrane utilization rate can not be improved simultaneously, the membrane rejection rate can be reduced simultaneously, and the like.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the membrane utilization rate cannot be improved and the rejection rate of the membrane can be reduced simultaneously in the stage type filter element assembly in the prior art, so that the manufacturing method of the stage type filter element is provided.
The invention provides a manufacturing method of a stage type filter element, which comprises the following steps:
The stage 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,
The manufacturing method comprises the following steps: a gluing step, namely gluing the first axial end and the second axial end of the integral membrane to form a section-to-section separation glue line;
A rolling step, namely rolling the integral membrane on the periphery of the central tube after the gluing step;
a membrane repairing step, namely repairing the integral membrane along the inter-section separation glue line after the rolling step to separate the integral membrane into at least a first section filter element and a second section filter element in a stage mode;
And a cutting step, after the film repairing step, the cutter is further moved towards the radial inner side to cut off the central tube, and at least two sections of cut central tubes are connected through a connecting piece to form a space.
In some embodiments, further comprising: a folding step, namely forming two opposite front surfaces and two opposite back surfaces of the integral membrane after folding before the gluing step, wherein a raw water flow channel is formed between the two opposite front surfaces, and a pure water flow channel is formed between the adjacent back surfaces;
in the gluing step, the inter-section separation glue line is arranged on the back surface of the folded integral membrane so as to seal and separate pure water flow channels of at least two sections of filter elements; the first section filter element comprises a first raw water flow passage formed between two opposite front surfaces of the first section filter element and a first pure water flow passage positioned at the back surface of the first section filter element, and the second section filter element comprises a second raw water flow passage formed between two opposite front surfaces of the second section filter element and a second pure water flow passage positioned at the back surface of the second section 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 is folded to form a folded edge, a first long side and a second long side, and an open end, the folded edge is attached to the central tube to be rolled, the first long side is located at the first axial end, and the second long side is located at the second axial end;
In the gluing step, 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 surface of the first section filter element through glue spraying, and forming a second filter element glue line on the back surface of the second section filter element through glue spraying;
In the film repairing step, the inter-section separation glue line is cut from the middle to form a first inter-section separation glue line positioned on the first section filter element and a second inter-section separation glue line positioned on the second section filter element; the first pure water flow passage is formed by enclosing the first glue line of the filter element and the first section separation glue line, and the opening of the first pure water flow passage faces the folded edge; and the second glue line of the filter element and the second separation glue line between the sections form the second pure water flow passage, and the opening of the second pure water flow passage faces the folded edge.
In some embodiments, in the step of gluing, the first glue line of the filter element includes a first glue line of the filter element and a second glue line of the filter element, the first glue line of the filter element is disposed near the first long side relative to the second long side, the first glue line of the filter element is disposed near the opening end relative to the folded edge, the first glue line of the filter element extends from the folded edge to two sides of the first glue line of the filter element, one end of the second glue line of the filter element is connected with the first glue line of the filter element, and the other end is connected with the first glue line of the inter-section separation;
In the gluing step, the second glue line of the filter element comprises a first second glue line of the filter element and a second glue line of the filter element, the first second glue line of the filter element is arranged relative to the first long edge and close to the second long edge, the second glue line of the filter element is arranged relative to the folded edge and close to the opening end, the first glue line of the filter element extends from the folded edge to the second glue line of the filter element to be connected, one end of the second glue line of the filter element is connected with the first glue line of the filter element, and the other end of the second glue line of the filter element is connected with the second glue line of the partition between the sections.
In some embodiments, in the step of gluing, in the plane where the membrane is unfolded by gluing, the first glue line of the filter element, the first separation glue line between the sections and the first glue line of the filter element are all arranged in parallel and are perpendicular to the central axis of the central tube, and the second glue line of the filter element 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 arranged on the central tube, and 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 tube;
in the rolling step, the first pure water diversion hole is opposite to the first section of filter element through rolling, the second pure water diversion hole is opposite to the second section of filter element, the first pure water flow channel is communicated with the first pure water diversion hole, and the second pure water flow channel is communicated with the second pure water diversion hole.
In some embodiments, in the step of sizing, the width of the inter-segment separation glue line is controlled by sizing, so that the spacing distance between the nearest pure water diversion hole one and the nearest pure water diversion hole two along the axis direction of the central tube is more than 2 times of the width of the inter-segment separation glue line.
In some embodiments, in the cutting step, the center tube is cut to form at least a broken first center tube segment and second center tube segment;
The manufacturing method further comprises a connecting step, wherein the connecting piece is arranged 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 main body and a protrusion, the protrusion is arranged on the peripheral wall of the connecting main body and protrudes outwards, and the protrusion is clamped at an 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 positioned on one axial side of the protrusion, the second connecting body is positioned on the other axial side of the protrusion,
In the connecting step, the first connecting main body is arranged in the first central pipe section in a penetrating mode, and the second connecting main body is arranged in the second central pipe section in a penetrating mode.
In some embodiments, in the connecting step, after the connecting piece is connected between the first central pipe section and the second central pipe section, a cavity is formed between the first section filter element and the second section filter element at intervals, and a water sealing piece is arranged on the periphery of the cavity so as 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 first axial end and the second axial end of the membrane before the membrane rolling step, the membrane is cut into the first section filter core and the second section filter core along the separation glue line through the membrane repairing process after being rolled on the central tube, the central tube is further inwards cut into at least two sections, and the two sections of central tubes are connected through the connecting piece after being cut, so that an interval can be formed between the two sections of central tubes, an effective separation cavity is effectively formed between the first section filter core and the second section filter core, raw water in the first section filter core enters the separation cavity after being filtered, and then enters the second section filter core for being filtered, the effect of stage filtration is effectively formed, compared with the prior art, the membrane with a certain length is not reserved between the two sections of filter core membranes, the cutting area is greatly reduced, the utilization rate of the membrane is greatly increased, the adaptability to the conditions of deflection and the like is greatly improved, the membrane rolling, the raw water in the membrane rolling process, the membrane in the membrane repairing process, the membrane in the membrane rolling process and the like can be effectively reduced, the rejection rate of the membrane in the manufacturing process is also improved, and the membrane rejection rate of the membrane in the filter core is effectively reduced.
Drawings
FIG. 1 is a schematic diagram of the membrane unit construction of a stage cartridge of the present invention;
FIG. 2 is a diagram showing the structure of the glue line arrangement of the stage filter element of the embodiment 1 before film rolling;
FIG. 3 is a film repair (cutting) flow chart of the stage filter element of the embodiment 1 after film rolling;
FIG. 4 is a flowchart of the connection steps in the method for manufacturing a stage cartridge of embodiment 1 of the present invention;
FIG. 5 is a flow path structure diagram of the inside of a stage cartridge of embodiment 1 of the present invention;
FIG. 6 is a water seal member configuration of a stage cartridge of example 1 of the present invention;
FIG. 7 is a block diagram of a connector for a stage cartridge of example 1 of the present invention;
FIG. 8 is a block diagram of a segmented center tube (thread structure) of a segmented cartridge of example 2 of the present invention;
FIG. 9 is a block diagram of a threaded connection for a stage cartridge of example 2 of the present invention;
FIG. 10 is a connection structure diagram of a connection member of a stage cartridge of embodiment 3 of the present invention;
FIG. 11 is a diagram showing the structure of the glue line arrangement of the stage filter element of example 4 (3 stages) before film rolling;
Fig. 12 is a flowchart showing the connection steps in the method for manufacturing the stage cartridge according to embodiment 4 of the present invention.
The reference numerals in the drawings are as follows:
1. A central tube; 11. pure water diversion holes I; 12. pure water diversion holes II; 13. a first center tube segment; 14. a second center tube segment; 15. a water-stop plate; 16. tapping; 17. pure water diversion holes III; 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 face; 28. a back surface; 29. pure water guiding cloth; 210. a third section of filter element; 3. a glue line; 31. separating glue lines between the sections; 32. a first filter element and a first glue line; 33. a first filter element and a second filter element are connected through a glue line; 34. a first filter element adhesive line; 35. a second glue line of the filter element II; 36. a filter element three-glue line; 4. a connecting piece; 41. a connecting body; 42. a protrusion; 43. an external thread; 44. glue; 5. a cavity; 6. a water seal; 7. a filter bottle body; 9. and (5) a water inlet grid.
Detailed Description
The invention provides an integrated roll-type membrane filter core with a stage-type filtering function and a structure thereof, and according to the structural characteristics of the integrated roll-type membrane filter core, the stage-type function which can be realized is not limited to one stage and two stages, but also comprises three stages or even more stages. The invention mainly relates to a filter element structure and a waterway for realizing one-stage two-stage functions by the same central tube and a manufacturing method thereof, and specifically comprises the following steps:
Fig. 5 is a schematic water path diagram of a stage filter element assembly, water inlet of the filter element enters from a raw water port, enters into a water inlet end face of the first section filter element 21 along the outer walls 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, pure water is collected and discharged through a central tube, concentrated water of the first section filter element 21 is taken as water inlet of the second section filter element 22 to enter into the end face of the second section filter element 22 along the middle of the two sections filter elements to be purified, pure water is also collected and discharged through the central tube, and concentrated water is discharged through a concentrated water outlet.
As shown in fig. 1-12, the present invention provides a method for manufacturing a stage filter element, wherein:
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: a gluing step, namely gluing the first axial end 23 and the second axial end 24 of the integral membrane 2 to form a section-to-section separation glue line 31;
a rolling step, namely rolling the integral membrane 2 on the periphery of the central tube 1 after the gluing step;
A membrane repairing step of repairing the integral membrane 2 along the inter-section separation glue line 3 after the rolling step to separate the integral membrane 2 into at least a first-section filter element 21 and a second-section filter element 22;
And a cutting step, after the film repairing step, the cutter is further moved towards the radial inner side to cut off the central tube 1, and at least two sections of the cut central tubes 1 are connected through a connecting piece 4 to form a space.
According to the invention, the inter-section separation glue line is arranged between the first axial end and the second axial end of the membrane before the membrane rolling step, the membrane is cut into the first section filter core and the second section filter core along the separation glue line through the membrane repairing process after being rolled on the central tube, the central tube is further inwards cut into at least two sections, and the two sections of central tubes are connected through the connecting piece after being cut, so that an interval can be formed between the two sections of central tubes, an effective separation cavity is effectively formed between the first section filter core and the second section filter core, raw water in the first section filter core enters the separation cavity after being filtered, and then enters the second section filter core for being filtered, the effect of stage filtration is effectively formed, compared with the prior art, the membrane with a certain length is not reserved between the two sections of filter core membranes, the cutting area is greatly reduced, the utilization rate of the membrane is greatly increased, the adaptability to the conditions of deflection and the like is greatly improved, the membrane rolling, the raw water in the membrane rolling process, the membrane in the membrane repairing process, the membrane in the membrane rolling process and the like can be effectively reduced, the rejection rate of the membrane in the manufacturing process is also improved, and the membrane rejection rate of the membrane in the filter core is effectively reduced.
In order to solve the problems of scale inhibitor and long service life of the filter element in the stage-type filter element technology of connecting a plurality of filter elements in series, the invention provides a stage-type filter roll type membrane filter element structure which is formed by sharing a central tube in a manufacturing stage and connecting a plurality of filter elements into a whole after the manufacturing is finished.
The core invention points of the invention are as follows: the central tube is cut off integrally after the diaphragm is cut off, and compared with the existing central tube which is not cut off, the central tube also needs to reserve the space of the diaphragm to form a cavity between filter cores, the diaphragm area is cut off too much, the diaphragm utilization rate is low, and the diaphragm is scrapped due to the fact that the diaphragm is offset; according to the invention, the diaphragm and the central tube are directly cut off, and a part of the diaphragm is not required to be cut off to form a cavity, so that the utilization rate of the diaphragm area is increased, the adaptability to rolling deflection is increased, and the rejection rate is reduced.
And compared with the prior patent, the invention only needs to beat one inter-section separation glue line.
The invention combines the gluing process and the later membrane repairing process on the basis of the existing filter element manufacturing technology, and successfully realizes the function of the one-stage two-section filter element filtering technology of the same central tube through the use of the connecting piece and the water sealing piece.
The beneficial effects are that:
(1) Through the gluing process, the later membrane repairing process and the use of the connecting piece and the water sealing piece, the one-stage two-section filter element filtering technology on the same central pipe 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 integration and the light-weight design of the filter elements are realized, and the important promotion effect on the reduction of the volumes of the filter elements and the whole machine is realized;
(2) Compared with the technology of realizing a high-recovery filter element by using a scale inhibitor means, the stage-type filter element technology has no sanitary and safety problems caused by 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 flow rate and the recovery rate relation, and the service life of the filter element can be effectively prolonged;
(4) Compared with the single-stage filter element technology, the stage filter element technology can improve the water purifying and producing rate of the filter element;
(5) Through the use of the technology, not only can the first-stage two-section type filter element be manufactured, but also the first-stage three-section type filter element can be derived, the three-section type filter element connection is realized, the water yield of the filter element can be further improved, and the service life is prolonged;
The invention provides a manufacturing method of a stage type filter element, which comprises the following steps: based on the existing filter element manufacturing technology, the gluing technology and the later film repairing technology are combined, and the connecting piece and the water sealing piece are used, so that the same central tube is successfully provided with the one-stage two-section filter element filtering technology. Compared with the traditional single-stage filter element filtering technology, the filter element scaling problem 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 changed into the stage filter element through simple steps, the cost is low, the process requirement is low, and the membrane is almost free from loss.
The difference between the invention and the earlier patent is mainly that the membrane repair stage and the filter element are in action. When the membrane is repaired, the two sections of filter elements are cut off by a cutter together with the membrane and the central tube at the position of the two sections of filter element parting gel lines, the two sections of filter elements are divided into two after being cut off, and then the two sections of filter elements are connected into a whole by a double-head connecting piece; when the membrane is repaired by the earlier scheme, a gap (two cutters are completed) needs to be cut around the two sections of filter element parting lines, and the central tube is not cut off, namely the two sections of filter elements are still on the same central tube after the membrane is repaired. Compared with the prior proposal, the method has the advantages that no gap is reserved during film repair, the adhesive width is not occupied, and the film repair qualification rate can be improved.
In some embodiments, further comprising: a folding step, namely forming two opposite front surfaces and two opposite back surfaces of the integral membrane 2 after folding before the gluing step, wherein a raw water flow channel is formed between the two opposite front surfaces, and a pure water flow channel is formed between the adjacent back surfaces;
In the step of gluing, the inter-section 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 passages of at least two sections of filter elements; the first section filter element 21 includes a first raw water flow passage formed between two opposite front surfaces thereof and a first pure water flow passage located at a rear surface of the first section filter element 21, and the second section filter element 22 includes a second raw water flow passage formed between two opposite front surfaces thereof and a second pure water flow passage located at a rear surface of the second section 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 membrane is formed by at least two stage type filter elements, and the preferred relation among the pure water flow passage, the raw water flow passage and the inter-stage separation gel line of the two stage type filter elements is that the first and the second stage type filter elements are formed by cutting from the inter-stage separation gel line in the membrane repairing process, the inter-stage separation gel line is used for cutting and dividing the first pure water flow passage and the second pure water flow passage, the first pure water flow passage and the second pure water flow passage can be effectively sealed respectively, namely, the rest of the inter-stage separation gel line after cutting can achieve the sealing effect, the outlet of the first raw water flow passage of the first stage filter element is communicated with the inlet of the second raw water flow passage of the second stage filter element, raw water can enter the second raw water flow passage again after being filtered by the first stage filter element, the at least two stage type filter elements are formed, the water purifying rate is improved, meanwhile, the interval cavity is formed between the two stage filter elements, the flow rate of water can be improved by the interval cavity, the generation of scale can be reduced, the concentration difference can be prolonged, and the service life of the filter element can be prolonged.
The invention combines the gluing process and the later membrane repairing process and uses the connecting piece and the water sealing piece on the basis of the existing filter element manufacturing technology, and successfully realizes the one-stage two-section filter element filtering technology of the same central tube.
And a membrane unit. The membrane unit of this technical scheme uses the membrane for rolling up the membrane, still includes intake grid 9, pure water guide 29 to constitute the membrane unit. The coiled membrane needs to be staggered and folded according to a certain distance d1, different membrane pages need to be placed by a staggered distance d2, and the specific calculation of the distance is as follows: d1 D2=outer diameter of center tube/number of membrane pages; the lowest membrane page is placed close to the central tube, and the folded short sides face downwards when the membrane page is placed, so that the membrane utilization rate is improved to the greatest extent; the folding direction of the membrane page is that the separation layers are folded in opposite directions, a water inlet grid is arranged between the two folded separation layers and used for guiding water when the filter element runs, and preventing the filter element from being put for a period of time when the filter element is connected with water, the separation layers are mutually bonded together, and the separation layers are destroyed when water is supplied again; 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 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 and rolled, the first long edge is located at the first axial end 23, and the second long edge is located at the second axial end 24;
in the gluing step, gluing is performed so that one end of the inter-section separation glue line 31 extends to be connected with the folded edge 25; and the back of the first section filter element 21 is glued to form a first filter element glue line, and the back of the second section filter element 22 is glued to form a second filter element glue line;
In the film repairing step, the inter-section separation glue line 31 is cut from the middle to form a first inter-section separation glue line positioned on the first section filter element 21 and a second inter-section separation glue line positioned on the second section filter element 22; the first pure water flow passage is formed by enclosing the first glue line of the filter element and the first separation glue line between the sections, and the opening of the first pure water flow passage faces the folded edge 25; and the second glue line of the filter element and the second separation glue line between the sections form the second pure water flow passage, and the opening of the second pure water flow passage faces the folded edge 25.
The membrane is a preferable folding mode before rolling and a preferable cutting mode after rolling, the folded edge formed by folding is attached to the central tube, so that raw water can enter a raw water flow passage on the front side of the membrane, and the raw water permeates into a pure water flow passage on the back side to form pure water, and enters the interior of the central tube at the folded edge; the first and second pure water channels can be sealed respectively by the residual first and second section separation glue lines on the first and second section filter elements after cutting, and pure water is effectively guided towards the central tube at the folded edge, so that the membrane utilization rate is improved, the cutting of the membrane area is reduced, the effective sealing of the two pure water channels is ensured, the adaptability to the conditions of rolling deflection and the like in the rolling process is stronger, and the rejection rate of the membrane is reduced.
In some embodiments, in the step of gluing, the first glue line of the filter element includes a first glue line of the filter element 32 and a second glue line of the filter element 33, the first glue line of the filter element 32 is disposed near the first long side relative to the second long side, the second glue line of the filter element 33 is disposed near the open end 26 relative to the folded edge 25, the first glue line of the filter element 32 extends from the folded edge 25 to be connected with the second glue line of the filter element 33, one end of the second glue line of the filter element 33 is connected with the first glue line of the filter element 32, and the other end is connected with the first separation glue line of the section;
In the step of gluing, the second glue line of the filter element further comprises a first second glue line 34 of the filter element and a second glue line 35 of the filter element, the first second glue line 34 of the filter element is arranged relative to the first long edge and close to the second long edge, the second glue line 35 of the filter element is arranged relative to the folded edge 25 and close to the opening end 26, the first glue line 34 of the filter element extends from the folded edge 25 to be connected with the second glue line 35 of the filter element, one end of the second glue line 35 of the filter element is connected with the first glue line 34 of the filter element, and the other end of the second glue line 35 of the filter element is connected with the second glue line of the inter-section separation.
The invention relates to a preferable glue spraying mode of a first filter element glue line on a first section filter element and a preferable glue spraying mode of a second filter element glue line on a second section filter element, the first filter element glue line can extend in the long side direction of the first section filter element and seal pure water, a raw water inlet is prevented from entering a first pure water flow channel, the first filter element glue line II can extend at the opening end of the first filter element section to seal pure water at the opening end, so that the pure water in the pure water flow channel is prevented from being mixed with raw water outside the opening end, and the first filter element glue line I, the second filter element glue line II and the section separation glue line form a U-shaped sealing structure as shown in fig. 2, so that the water in the first pure water flow channel is effectively led to the folded edge to enter the central tube; the first filter element second glue line can extend in the long side direction of the second filter element and seal pure water, so that the pure water in the second pure water flow channel is prevented from flowing out from the lower side, the second filter element second glue line can extend at the opening end of the second 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 raw water outside the opening end, and the first filter element second glue line, the second filter element second glue line and the intersegmental separation glue line form a U-shaped sealing structure as shown in fig. 2, so that the water in the second pure water flow channel is effectively guided to the edge folding part and enters the central tube.
In some embodiments, in the step of gluing, in the plane where the integral membrane 2 is unfolded by gluing, the first filter element glue line 32, the second inter-segment separation glue line 31 and the first filter element glue line 34 are all 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. The first glue line of the filter element, the first separation glue line between sections and the first glue line of the filter element are preferably arranged in parallel, are connected and extend from the folded edge, can seal the inlet end of the first filter element, the first filter element and the second filter element and the outlet section of the second filter element, the first filter element and the second filter element are connected in a straight line and parallel to the central tube axis, and the opening ends of the first filter element and the second filter element can be sealed by pure water respectively.
The first filter element glue line I, the second filter element glue line II, the first filter element glue line I and the second filter element glue line II are preferably manufactured in an integrated glue-beating mode, a U-shaped structure shown in figure 2 is formed, and effective sealing between a pure water flow channel 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 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 guide hole 11 is opposite to the first section of filter element 21 through rolling, the second pure water guide hole 12 is opposite to the second section of filter element 22, the first pure water flow channel is communicated with the first pure water guide hole 11, and the second pure water flow channel is communicated with the second pure water guide hole 12.
The first pure water diversion hole and the second pure water diversion hole are respectively arranged on the central tube and can be respectively communicated with the first pure water flow channel and the second pure water flow channel to lead pure water into the central tube and integrally discharge the pure water to a required position in the central tube.
In some embodiments, in the step of sizing, the width of the inter-segment separation glue line 31 is controlled by sizing such that the distance between the nearest pure water diversion hole 11 and the nearest pure water diversion hole 12 in the axial direction of the central tube 1 is greater than 2 times the width of the inter-segment separation glue line 31. The distance between the nearest pure water diversion hole I and the nearest pure water diversion hole II is more than 2 times of the width of the inter-section separation glue line, so that the pure water diversion hole I and the pure water diversion hole II are respectively positioned at two sides of the inter-section separation glue line, the situation that pure water cannot be received due to the fact that the pure water diversion hole I and the pure water diversion hole II are opposite to the inter-section separation glue line is prevented, the tightness of pure water in a central tube is ensured, and pure water leakage or mixing with concentrated water and the like is prevented.
The filter element part 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 pure water guide hole I11 and a pure water guide hole II 12, wherein the pure water guide hole I11 is mainly used for collecting pure water of a first section of filter element, the pure water guide hole II 12 is mainly used for collecting pure water of a second section of filter element, the number of holes of the two parts of pure water guide holes is more than or equal to 2, a certain interval distance is needed between adjacent holes of the pure water guide hole I11 and the pure water guide hole II 12, and the distance is more than 2 times of the width of a separation glue line between the sections; further comprising a water-stop plate 15 for separating pure water from raw water; and a pure water outlet 18 for guiding the collected pure water out. The first section of filter element 21 covers the pure water diversion hole I11 of the central tube; the second section of filter element 22 covers the pure water diversion hole II 12 of the central tube 1.
In some embodiments, in the cutting step, the center tube 1 is cut to form at least a broken first center tube segment 13 and second center tube segment 14;
The manufacturing method further comprises a connecting step, wherein the connecting piece 4 is arranged 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 main body 41 and a protrusion 42, the protrusion 42 is arranged on the outer peripheral wall of the connecting main body 41 and protrudes outwards, and the protrusion 42 is clamped at an interval position between the first central pipe section 13 and the second central pipe section 14.
The connecting body adopts a convex structure to effectively separate the two sections of central pipe sections and form a spacing position, so that two sections of filter cores wound on the two sections of central pipe sections are also separated into cavities, water flowing out of the first raw water flow passage enters the cavities first and then enters the second raw water flow passage, the raw water flow rate is improved, concentration polarization is reduced, water scale is reduced, and the service life of the filter cores is prolonged.
In some embodiments, the connecting body 41 has a cylindrical structure, and the protrusion 42 divides the connecting body 41 into a first connecting body and a second connecting body, wherein 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 tube section 13, and the second connecting body is inserted into the second central tube section 14.
Preferably, the protrusions 42 are ring-shaped structures or a plurality of spaced structures provided on the outer circumferential wall of the connection body 41, and the outer diameter of the protrusions 42 is flush with the outer diameter of the center tube 1.
The connecting main body and the bulge are further preferably structured and preferably connected, the bulge divides the connecting main body into two parts, one part is inserted into the first central pipe section, the other part is inserted into the second central pipe section, and the bonding strength between the two central pipe sections is effectively improved; and the bulge is preferably an annular structure or a plurality of block structures arranged at intervals in the circumferential direction, and the outer diameter of the bulge is flush with the outer diameter of the central tube, so that the bulge cannot influence the cavity part, the lifting of the raw water flow rate is ensured, and the anti-scaling effect is improved.
The middle of the first section filter element 21 and the second section filter element 22 also comprises a double-head connecting piece (figure 4), and the function of the double-head connecting piece is mainly to connect the first section filter element 21 and the second section filter element 22 formed after membrane repair to form a whole again, and the double-head connecting piece is an important part for realizing the stage-type filtering function of the two sections filter element. 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, a cavity 5 is formed between the first section filter element 21 and the second section filter element 22, and a water sealing member 6 is disposed on the periphery of the cavity 5 to seal the cavity 5.
The membrane cutting device is a preferable connection mode after membrane cutting, namely the first and second central tube sections are effectively separated through the bulges of the connecting main body, so that a separated cavity is formed between the first and second section filter elements, 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 preventing effect is improved, the service life of the filter elements is prolonged, and the position of the cavity can be effectively sealed through the water sealing piece.
And (5) setting glue lines. The invention discloses a technology for realizing a stage type filter element on the same central tube through gluing and film repairing, and fig. 2 shows a specific gluing mode. After placing the first film sheet in the manner mentioned in the film unit, the film is glued 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 called a first filter element and a second filter element for short. As can be seen from fig. 2, the glue lines of the first section filter element 21 and the second section filter element 22 are glued on three sides except for the membrane close to the central tube; the first section filter element 21 and the second section filter element 22 are two independent and complete glue lines, are perpendicular to the glue line of the central tube and do not coincide with the outer edge of the membrane, and a certain distance is required to be reserved for winding the filter element and repairing the membrane after the glue is solidified so as to ensure the tightness of the filter element; the width of the glue line of each filter element is required to be larger than the width of the corresponding water guide opening of the filter element so as to prevent the glue from blocking the water guide opening to affect water production; every membrane page put all need beat gluey mode according to the shown in fig. 2 and beat gluey, beat gluey and carry out the rolling after last membrane page is placed, realize that the filter core system is cylindrical, repair the membrane operation after glue solidification.
And (5) repairing the film. In the technical scheme, the stage filter element technology is realized by arranging and repairing the membrane on the same central tube by means of a glue line, and the specific membrane repairing mode is as follows. After the filter element is solidified, a corresponding film trimming blade is used for trimming, a specific die trimming mode is shown in fig. 3, the position of the blade of a die trimming device (not specifically described) is required to be adjusted by taking an unreeled central tube before die trimming, the blade 1, the blade 2 and the blade 3 are required to correspond to the trimming positions of the filter element respectively, 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 center tube, and therefore, the working stroke of the blade 3 is required to be capable of completely cutting the center tube. When the die repairing equipment is started to repair the film, the blade 1 and the blade 2 work first, repair the films at two ends of the filter element, remove the films with uneven edges, and then the blade 3 works to cut the filter element into two sections. The cut filter element is divided into a first segment 21 and a second segment 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 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 connection function of the connecting piece and the water sealing piece. The specific connection mode is shown in fig. 4, the first step is to connect the connecting piece with the first section filter element 21, then install the water sealing piece 6, and finally connect the second section filter element 22 to assemble a complete one-stage two-section filter element. The connecting piece is shown in fig. 7, two sealing rings are respectively arranged on two sides of the connecting piece, and the sealing rings are matched with the central tube 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 elements and determining the interval distance between the two sections of filter elements.
The water path principle of the stage type filter element after trimming and assembling is described by taking the distribution of one ends of a raw water port, a concentrated water port and a pure water port as an example in the technical scheme, and the water path principle of the stage type filter element is specifically shown in fig. 5. In order to realize 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 has the function of preventing the concentrated water of the second section of filter element 22 from being mixed with raw water, thereby influencing the service life of the filter element and the water production efficiency. The water sealing piece is shown in fig. 7, 6 ribs are arranged on the outer side of the water sealing piece, so that the strength of the water sealing piece is improved, the water sealing piece can be matched with the inner wall of the filter flask, the rigidity of the filter element is improved, the filter element is prevented from shaking in the filter flask, meanwhile, raw water at the inlet of the filter element can pass through gaps among the ribs, the bottom of the filter flask is reached, the right side of the second section of filter element 22 is reached, and the raw water inlet section is provided. In order to ensure that the water sealing piece can realize the effect of waterway separation, adhesive tapes can be used at two ends of the water sealing piece to be respectively fixed with the first section filter element 21 and the second section filter element 22, so that the integral strength of the stage type filter element is improved. A second water sealing member (i.e. a filter element end cover) is arranged on the left side of the first section filter element 21, and in order to prevent the concentrated water and the raw water of the first section filter element 21 from being mixed, the first section filter element and the filter element can be fixedly sealed in a tape mode. According to the waterway shown in fig. 5, raw water of the second section filter element 22 enters from the rib gap of the water sealing member 6 to the bottom of the filter flask, namely, the raw water inflow section of the second section filter element 22, pure water is collected through the central pipe water guide hole, concentrated water enters into the gaps of the first section filter element 21 and the second section filter element 22 and is further filtered and purified as raw water of the second section filter element 22 under the driving of pressure, so that the secondary utilization of the concentrated water is realized, the water yield of the filter element is improved, and meanwhile, the pure water is collected through the water guide hole of the filter element and flows out from the pure water gap of the central pipe after being mixed with the pure water of the second section filter element 22, and the concentrated water flows out from the concentrated water end.
The above is a description of the manner of the filter element gluing and film repairing treatment of the first-stage two-stage type stage filter element filtering technology realized on the same central tube, and the obtained filter element has advantages in the aspects of safety, volume, performance and the like compared with other ways of realizing high water yield.
Additional example 2. The above is one of the preferred embodiments of the present technical solution. In the connection of the two filter elements, threaded connections can also be used. That is, after the membrane repair process is completed, the center tube of the two-stage filter element is subjected to tapping operation, as shown in fig. 8 (the specific operation is not described in detail). The connection member used in this embodiment, see fig. 9, is a threaded connection member, threaded at both ends, and capable of mating with the threads of the center tube. The installation mode is basically consistent with the scheme, and compared with sealing by using a sealing ring, the threaded connection is less in possibility of leakage and higher in connection strength.
Additional example 3. The two sections of filter elements are connected by gluing. 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 connecting members are fixed to the first segment filter element 21 and the second segment filter element 22 by glue. Compared with the embodiment, the embodiment does not need to use a sealing ring for sealing or tapping, only needs to use part of glue, and has more cost advantage.
Additional example 4. A first-stage three-section filter element filtering technology. The specific glue spraying mode is shown in fig. 11, the technical scheme is a three-section type filter element filtering technology, the 1,2 and 3-stage filter elements are respectively called a first section filter element 21, a second section filter element 22 and a third section filter element 210, and compared with the glue spraying mode in fig. 2, the scheme needs to spray four glue lines perpendicular to a central tube. The specific manufacturing mode of the filter element is shown in fig. 12. In this embodiment, the 3-segment filter element may be connected by the threaded connection described in the additional embodiment 2 and the cementing scheme in the additional embodiment 3, which are not described herein.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. A manufacturing method of a stage type filter element is characterized in that:
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: a gluing step, namely gluing between the axial first end (23) and the axial second end (24) of the integral membrane (2) to form a section separation glue line (31);
A rolling step, namely rolling the integral membrane (2) on the periphery of the central tube (1) after the gluing step;
A membrane repairing step, namely repairing the integral membrane (2) along the inter-section separation glue line (31) after the rolling step to separate the integral membrane (2) into at least a first section filter element (21) and a second section filter element (22) of a stage type;
A cutting step, after the film repairing step, the cutter is further moved towards the radial inner side to cut off the central tube (1), and at least two sections of cut central tubes (1) are connected through a connecting piece (4) to form a space;
In the film repairing step, the inter-section separation glue line (31) is cut from the middle to form a first inter-section separation glue line positioned on the first section filter element (21) and a second inter-section separation glue line positioned on the second section filter element (22);
In the gluing step, a first filter element glue line (32), a second filter element glue line (33), a first filter element second glue line (34) and a second filter element glue line (35) are formed in a plane unfolded by the integral membrane (2), the first filter element glue line (32), the inter-section separation glue line (31) and the first filter element second glue line (34) are all arranged in parallel and are perpendicular to the central axis of the central tube (1), and the first filter element glue line (33) and the second filter element glue line (35) are positioned on the same straight line and are parallel to the central axis of the central tube (1);
One end of the first filter element glue line II (33) is connected with the first filter element glue line 32, the other end of the first filter element glue line II is connected with the inter-section separation glue line, one end of the second filter element glue line II (35) is connected with the first filter element glue line 34, and the other end of the second filter element glue line II is connected with the inter-section separation glue line II.
2. The method for manufacturing the stage filter element according to claim 1, wherein:
Further comprises: a folding step, wherein the integral membrane (2) is folded to form two opposite front surfaces and two opposite back surfaces before the gluing step, a raw water flow channel is formed between the two opposite front surfaces, and a pure water flow channel is formed between the adjacent back surfaces;
in the gluing step, the inter-section 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 passages of at least two sections of filter elements; the first section filter element (21) comprises a first raw water flow passage formed between two opposite front surfaces thereof and a first pure water flow passage positioned at the back surface of the first section filter element (21), and the second section filter element (22) comprises a second raw water flow passage formed between two opposite front surfaces thereof and a second pure water flow passage positioned at the back surface of the second section 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 for manufacturing the stage filter element according to claim 2, wherein:
In the folding step, the integral membrane (2) is folded to form a folded edge (25), a first long side, a second long side and an opening end (26), the folded edge (25) is attached to the central tube (1) to be rolled, the first long side is positioned at the first axial end (23), and the second long side is positioned at the second axial end (24);
In the gluing step, 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 surface of the first section filter element (21) through glue spraying, and forming a second filter element glue line on the back surface of the second section filter element (22) through glue spraying;
In the film repairing step, the inter-section separation glue line (31) is cut from the middle to form a first inter-section separation glue line positioned on the first section filter element (21) and a second inter-section separation glue line positioned on the second section filter element (22); the first pure water flow passage is formed by enclosing the first glue line of the filter element and the first separation glue line between the sections, and the opening of the first pure water flow passage faces the folded edge (25); and the second glue line of the filter element and the second separation glue line between the sections form the second pure water flow passage, and the opening of the second pure water flow passage faces the folded edge (25).
4. A method of making a stage cartridge according to 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), wherein the first filter element glue line (32) is arranged at a position close to the first long side relative to the second long side, the second filter element glue line (33) is arranged at a position close to the opening end (26) relative to the folded edge (25), and the first filter element glue line (32) extends from the folded edge (25) to be connected with the second filter element glue line (33);
In the gluing step, the filter element second glue line comprises a filter element second glue line I (34) and a filter element second glue line II (35) through gluing, the filter element second glue line I (34) is arranged relative to the first long edge and close to the position of the second long edge, the filter element second glue line II (35) is arranged relative to the folded edge (25) and close to the position of the open end (26), and the filter element second glue line I (34) extends from the folded edge (25) to be connected with the filter element second glue line II (35).
5. The method for manufacturing the stage filter element according to claim 2, wherein:
The central tube (1) is provided with a pure water guide hole I (11) and a pure water guide hole II (12), and the pure water guide hole I (11) and the pure water guide hole II (12) penetrate from the outer wall to the inner wall of the central tube (1);
In the rolling step, the first pure water guide hole (11) is opposite to the first section of filter element (21) through rolling, the second pure water guide hole (12) is opposite to the second section of filter element (22), the first pure water flow channel is communicated with the first pure water guide hole (11), and the second pure water flow channel is communicated with the second pure water guide hole (12).
6. The method for manufacturing the stage filter element according to claim 5, wherein:
In the step of gluing, the width of the inter-section separation glue line (31) is controlled by gluing, so that the spacing distance between the nearest pure water diversion hole I (11) and the nearest pure water diversion hole II (12) along the axial direction of the central tube (1) is more than 2 times of the width of the inter-section separation glue line (31).
7. The method for manufacturing the stage filter element according to any one of claims 1 to 6, wherein:
in the cutting step, the central tube (1) is cut to form at least a first central tube section (13) and a second central tube section (14) which are broken;
The manufacturing method further comprises a connecting step, wherein the connecting piece (4) is arranged 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 main body (41) and a protrusion (42), the protrusion (42) is arranged on the peripheral wall of the connecting main body (41) and protrudes outwards, and the protrusion (42) is clamped at an interval position between the first central pipe section (13) and the second central pipe section (14).
8. The method for manufacturing the stage filter element according to claim 7, wherein:
the connecting body (41) is of a cylindrical structure, the connecting body (41) is divided into a first connecting body and a second connecting body by the bulge (42), the first connecting body is positioned on one axial side of the bulge (42), and the second connecting body is positioned on the other axial side of the bulge (42);
in the connecting step, the first connecting main body is arranged in the first central pipe section (13) in a penetrating mode, and the second connecting main body is arranged in the second central pipe section (14) in a penetrating mode.
9. The method for manufacturing the stage filter element according to claim 7, 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 filter element (21) and the second section filter element (22), and a water sealing piece (61) is arranged on the periphery of the cavity (5) so as to seal the cavity (5).
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| CN116282371A (en) * | 2023-01-18 | 2023-06-23 | 珠海格力电器股份有限公司 | Integrated roll-type membrane filter element with stage-type filtering function and water purifier |
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