Central tube, reverse osmosis filter element and water purification equipment

Abstract

The utility model discloses a central tube, a reverse osmosis filter element and a water purification device, and relates to the technical field of water purification device manufacturing, wherein the central tube is applied to the reverse osmosis filter element, the central tube comprises a tube body and a functional filter material, the tube body has an inner cavity, and a receiving groove is arranged on the surface of the tube body away from the inner cavity; the functional filter material is received in the receiving groove and connected to the tube body, and the functional filter material is used for scale prevention and / or antibacterial. The central tube, reverse osmosis filter element and water purification device provided by the technical solution of the utility model are intended to improve the production efficiency of the central tube and the reverse osmosis filter element.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment manufacturing, in particular to a central tube, a reverse osmosis filter element and water purification equipment. Background Art

[0002] Reverse osmosis membrane is an important component in water treatment technology, mainly used to remove dissolved salts, colloids, microorganisms and organic matter in water. During the use of reverse osmosis membrane, as time goes by, impurities such as minerals, suspended matter, organic matter in concentrated water will be deposited on the surface of the membrane layer, which is easy to form a scaling layer and breed bacteria.

[0003] Based on this, in the production process of reverse osmosis membranes, it is usually necessary to add functional filter materials to the reverse osmosis membranes to play a scale inhibition or antibacterial effect according to different application scenarios of the reverse osmosis membranes, thereby maintaining the filtration efficiency of the reverse osmosis membranes and extending their service life.

[0004] However, when adding antiscalant to the reverse osmosis membrane of the related art, it is usually necessary to add functional components, which makes the production process of the reverse osmosis membrane more complicated and the production efficiency is low. Utility Model Content

[0005] The main purpose of the utility model is to provide a central tube, a reverse osmosis filter element and a water purification device, aiming to improve the production efficiency of the central tube and the reverse osmosis filter element.

[0006] To achieve the above-mentioned purpose, the utility model provides a central tube, which is applied to a reverse osmosis filter element. The central tube includes a tube body and a functional filter material, wherein the tube body has an inner cavity, and a receiving groove is provided on the surface of the tube body facing away from the inner cavity; the functional filter material is received in the receiving groove and connected to the tube body, and the functional filter material is used for scale inhibition and / or antibacterial.

[0007] In some embodiments, the number of the accommodating groove is at least one, and the accommodating groove is disposed at at least one end of the tube body along the axial direction.

[0008] In some embodiments, the number of the containing tank is one, and the containing tank is disposed at the first end of the tube body, and the first end is configured to correspond to the concentrated water outlet end of the reverse osmosis filter element.

[0009] In some embodiments, there are two receiving tanks, which are respectively arranged at the first end and the second end of the tube body, and the first end is configured to correspond to the concentrated water outlet end of the reverse osmosis filter element; the volume of the receiving tank arranged at the first end is larger than the volume of the receiving tank arranged at the second end.

[0010] In some embodiments, the receiving tank includes multiple sub-tank bodies, which are arranged in sequence along the axial direction of the tube body; the functional filter material includes anti-scaling filter material and antibacterial filter material, and one of the anti-scaling filter material and the antibacterial filter material is placed in a single sub-tank body.

[0011] In some embodiments, along the axial direction of the tube body, a size of a sub-slot away from the first end is larger than sizes of other sub-slots.

[0012] In some embodiments, the depths of the sub-grooves are the same.

[0013] In some embodiments, the intervals between adjacent sub-grooves are the same.

[0014] In some embodiments, the accommodating groove is an annular groove, or the accommodating groove is a plurality of grooves arranged along the circumference of the tube body.

[0015] In some embodiments, the functional filter material is pressed onto the tube body.

[0016] The utility model also provides a reverse osmosis filter element, which comprises a central tube as provided in any of the above embodiments and a reverse osmosis membrane body wound around the central tube.

[0017] The utility model also provides a water purification device, which includes a reverse osmosis filter element as provided in any of the above embodiments.

[0018] The technical solution of the utility model provides a receiving groove on the surface of the tube body away from the inner cavity, and the functional filter material is accommodated in the receiving groove and connected to the tube body, which is beneficial to improving the contact effect between the functional filter material and concentrated water, thereby enhancing the scale inhibition or antibacterial effect of the functional filter material. At the same time, the method of directly providing the receiving groove on the surface of the tube body away from the inner cavity simplifies the placement process of the functional filter material and improves the processing efficiency of the reverse osmosis filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the planar structure of a central tube provided by an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 The schematic diagram of the structure of the central tube after removing the functional filter material is shown.

[0022] Description of Figure Numbers:

[0023] 100, central tube; 10, tube body; 11, receiving tank; 111, sub-tank body; 20, functional filter material; 21, anti-scaling filter material; 22, antibacterial filter material; 101, first end; 102, second end; X, axial direction.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] Reverse osmosis membrane is an important component in water treatment technology, mainly used to remove dissolved salts, colloids, microorganisms and organic matter in water. During the use of reverse osmosis membrane, as time goes by, impurities such as minerals, suspended matter, organic matter in concentrated water will be deposited on the surface of the membrane layer, which is easy to form a scaling layer and breed bacteria.

[0029] Based on this, in the production process of reverse osmosis membranes, it is usually necessary to add functional filter materials to the reverse osmosis membranes to play a scale inhibition or antibacterial effect according to different application scenarios of the reverse osmosis membranes, thereby maintaining the filtration efficiency of the reverse osmosis membranes and extending their service life.

[0030] However, when adding antiscalant to the reverse osmosis membrane of the related art, it is usually necessary to add functional components, which makes the production process of the reverse osmosis membrane more complicated and the production efficiency is low.

[0031] Please refer to Figure 1 and Figure 2 The utility model provides a central tube 100, which is applied to a reverse osmosis filter element. The central tube 100 includes a tube body 10 and a functional filter material 20, wherein the tube body 10 has an inner cavity, and a receiving groove 11 is provided on the surface of the tube body 10 away from the inner cavity; the functional filter material 20 is received in the receiving groove 11 and connected to the tube body 10, and the functional filter material 20 is used for scale inhibition and / or antibacterial.

[0032] The central tube 100 is applied to the reverse osmosis filter element so as to support the reverse osmosis membrane. Meanwhile, the central tube 100 can also be used to separate channels for different water flows so as to separate filtered fresh water from concentrated water.

[0033] The tube body 10 is the main structural component of the central tube 100 and has an inner cavity. A possible implementation is that the tube wall of the tube body 10 is enclosed to form a surrounding structure, and the tube wall is provided with a plurality of through holes connecting the inner cavity with the outside. In the structure of the reverse osmosis filter element, the reverse osmosis membrane body is wound around the central tube 100.

[0034] In this way, during the operation of the reverse osmosis filter element, the external raw water is filtered by the multi-layer reverse osmosis membrane body, and the impurities and pollutants in the raw water are filtered out, so that the fresh water flows into the inner cavity of the tube body 10 through multiple through holes, while the concentrated water with impurities and pollutants cannot pass through the reverse osmosis membrane body, thus separating the fresh water from the concentrated water.

[0035] The surface of the tube body 10 facing away from the inner cavity is provided with a receiving groove 11, that is, the receiving groove 11 is provided on the outer surface of the tube body 10. It should be noted that in these embodiments of the utility model, at least part of the structure of the receiving groove 11 needs to be connected to the outside, so that after the functional filter material 20 is subsequently placed in the receiving groove 11, the functional filter material 20 can contact with the concentrated water, thereby realizing the corresponding function.

[0036] Exemplarily, the receiving groove 11 can be set as a groove formed by radially recessing from the outer surface of the tube body 10, and the shape of the groove can be, but is not limited to, rectangular, semicircular or semi-elliptical. In these embodiments of the utility model, the shape of the receiving groove 11 can be set to be rectangular to increase the contact area between the wall surface of the receiving groove 11 and the functional filter material, which is conducive to the connection between the functional filter material and the tube body 10.

[0037] The function of the functional filter material 20 is to contact with concentrated water and play a role in scale inhibition and / or antibacterial effect. Among them, the functional filter material 20 plays a role in scale inhibition and / or antibacterial effect, which means that the functional filter material 20 can be used only for scale inhibition, in which case the functional filter material 20 can use a scale inhibitor as a material; the functional filter material 20 can also be used only for antibacterial effect, in which case the functional filter material 20 can use a material with antibacterial function such as silver or platinum; the functional filter material 20 can also have sufficient antibacterial effect at the same time, in which case the functional filter material 20 can be a composite material of a scale inhibitor, silver, and platinum.

[0038] It should be noted that in the embodiment in which the functional filter material 20 has both anti-scaling and antibacterial functions, it is necessary to set up a receiving tank with multiple receiving structures to respectively place the scale inhibitor, silver, platinum or silver-platinum composite material to reduce the interaction between the functional filter materials 20 with different functions, and the probability of the overall connection between the functional filter material 20 and the receiving structure being affected.

[0039] For example, in some embodiments of the present invention, the functional filter material 20 can be set as a scale inhibitor, and specifically, the functional filter material 20 can be set as an organic phosphorus series scale inhibitor. In this way, the organic phosphorus series scale inhibitor can be used to prevent the formation of calcium carbonate scale due to its good chelating, low-limit inhibition and lattice distortion effects.

[0040] Among them, the scale inhibitor can also be but is not limited to organic phosphorus salt series scale inhibitors or polycarboxylic acid scale inhibitors and dispersants, etc., and can be selected according to the actual application scenario of the reverse osmosis filter element.

[0041] The functional filter material 20 is connected to the tube body 10, which means that the functional filter material 20 is connected to the groove wall of the receiving groove 11. A possible implementation method is to press the functional filter material 20 processed into powder into the receiving groove 11 by pressing. In this way, the functional filter material is arranged inside the reverse osmosis filter element. On the one hand, the number of components that need to be produced in the production process of the reverse osmosis filter element can be reduced (no need to set up additional functional components to assemble the functional filter material), thereby improving the production efficiency of the reverse osmosis filter element. On the other hand, it provides a scale inhibition or antibacterial effect in the part with the most impurities and pollutants in the concentrated water, thereby improving the scale inhibition and / or antibacterial effect of the functional filter material.

[0042] It should be noted that in the related art, in the production and forming process of the central tube 100, the powder of the functional filter material 20 can be mixed with the forming raw material of the central tube 100, and then injection molded into the central tube 100. In this way, the central tube after molding is likely to cover the functional filter material 20, which makes it difficult for part of the functional filter material 20 to contact with concentrated water, resulting in poor scale inhibition and / or antibacterial effect.

[0043] In these embodiments of the utility model, a receiving groove 11 for receiving the functional filter material 20 is provided on the outer surface of the tube body 10, so that the functional filter material 20 can directly contact with the concentrated water, thereby effectively solving the problem of poor contact between the functional filter material 20 and the concentrated water in the aforementioned related technology, and having higher reliability.

[0044] In general, the technical solution of the utility model is to arrange a receiving groove 11 on the surface of the tube body 10 away from the inner cavity, so that the functional filter material 20 is accommodated in the receiving groove 20 and connected to the tube body 10, which is beneficial to improve the contact effect between the functional filter material 20 and concentrated water, thereby enhancing the scale prevention and / or antibacterial effect of the functional filter material 20; at the same time, the method of directly arranging the receiving groove 11 on the surface of the tube body 10 away from the inner cavity simplifies the placement process of the functional filter material 20 and improves the processing efficiency of the reverse osmosis filter element.

[0045] In some embodiments, the number of the accommodating groove 11 is at least one, and the accommodating groove 11 is disposed at least at one end of the tube body 10 along the axial direction X.

[0046] The number of the containing tank 11 is at least one, which means that the number of the containing tank 11 can be one, two, three, etc., and can be selected according to the quality of the raw water and the requirements for the discharge of concentrated water.

[0047] During the operation of the reverse osmosis filter element, the raw water flows from one end to the other end along the axial direction of the tube body 10, and the raw water flows from one side to the other side of the reverse osmosis membrane under the action of external pressure, and finally obtains fresh water flowing into the inner cavity. In these embodiments of the utility model, the receiving tank 11 is arranged at at least one end of the tube body 10 along the axial direction X, that is, at least one functional filter material 20 is arranged at the water inlet end or the water outlet end of the reverse osmosis filter element to obtain better scale inhibition and / or antibacterial effect. The above can be selected according to the water quality of the raw water and the parts of the reverse osmosis filter element where scaling or bacteria are likely to occur.

[0048] Exemplarily, in an embodiment where the raw water contains more impurities, three receiving tanks 11 can be set, wherein two receiving tanks 11 are arranged at one end of the tube body 10 along the axial direction X (i.e., the water inlet end or the water outlet end of the reverse osmosis filter element), and one receiving tank 11 is arranged at the other end of the tube body 10. In this way, the functional filter material 20 can be used to simultaneously perform scale prevention and / or antibacterial work at both ends of the water flow channel, thereby improving the filtering effect of the reverse osmosis filter element and extending the service life of the reverse osmosis filter element.

[0049] In the embodiment where the raw water has less impurities, the number of the receiving tank 11 can be set to one, and the receiving tank 11 is set at one end of the pipe body 10 corresponding to the water outlet end of the reverse osmosis filter element. In this way, since the raw water quality is good, the flow rate and impact of the water flow in the front and middle parts of the reverse osmosis filter element are relatively large, so that these positions are not easy to scale or breed bacteria, and then the functional filter material 20 connected to the receiving tank 11 can be used to prevent scale and / or inhibit bacteria at the water outlet end of the reverse osmosis filter element, thereby reducing the investment in the functional filter material 20 and reducing the production cost.

[0050] In some embodiments, the number of the containing tank 11 is one, and the containing tank 11 is disposed at the first end 101 of the tube body 10 , and the first end 101 is configured to correspond to the concentrated water outlet end of the reverse osmosis filter element.

[0051] The first end 101 is configured to correspond to the concentrated water outlet end of the reverse osmosis filter element, which means that in these embodiments of the present invention, when the reverse osmosis filter element is produced using the central tube 100, the first end 101 is placed at the end of the reverse osmosis filter element in the flow direction, that is, the water outlet end. In this way, since impurities and pollutants in the raw water will accumulate at the water outlet end of the reverse osmosis filter element, at this time, the functional filter material 20 in the receiving tank 11 can be used to contact the concentrated water, reducing the possibility of scaling or bacterial growth of impurities and pollutants.

[0052] In some embodiments, there are two receiving tanks 11, and the two receiving tanks 11 are respectively arranged at the first end 101 and the second end 102 of the tube body 10, and the first end 101 is configured to correspond to the concentrated water outlet end of the reverse osmosis filter element; the volume of the receiving tank 11 arranged at the first end 101 is greater than the volume of the receiving tank 11 arranged at the second end 102.

[0053] The two receiving grooves 11 are respectively arranged at the first end 101 and the second end 102 of the tube body 10, so that during the operation of the reverse osmosis filter element, the functional filter materials 20 arranged in the two receiving grooves 11 at the first end 101 and the second end 102 respectively act on the raw water just introduced and the concentrated water after filtering to achieve corresponding functions.

[0054] The first end 101 is configured to correspond to the concentrated water outlet end of the reverse osmosis filter element, that is, the functional filter material 20 arranged in the receiving tank 11 of the first end 101 is used to act on the concentrated water; correspondingly, the functional filter material 20 arranged in the receiving tank 11 of the second section 102 is used to act on the raw water.

[0055] The volume of the receiving tank 11 arranged at the first end 101 is greater than the volume of the receiving tank 11 arranged at the second end 102. The reason is that the second end 102 serves as the inlet end of the raw water. Since the flow rate of the raw water inflow is greater than that of the first end 101, under the flushing effect of the water flow, the probability of impurities in the raw water scaling at the second end 102 is lower. At this time, by differentially designing the volumes of the two receiving tanks 11 at the two ends, the amount of functional filter material 20 can be reduced to a certain extent, thereby saving the amount of functional filter material 20.

[0056] In some embodiments, the containing tank 11 includes a plurality of sub-tank bodies 111, and the plurality of sub-tank bodies 111 are arranged in sequence along the axial direction X of the tube body 10; the functional filter material 20 includes a scale-inhibiting filter material 21 and an antibacterial filter material 22, and one of the scale-inhibiting filter material 21 and the antibacterial filter material 22 is placed in a single sub-tank body 111.

[0057] In these embodiments of the present invention, the containing groove 11 is divided into a plurality of sub-grooves 111 which are sequentially spaced apart along the axial direction, so as to place the functional filter materials 20 in categories and reduce the possibility of interaction between different functional filter materials 20 .

[0058] For example, in some embodiments, the number of sub-tanks 111 can be set to three, and the three sub-tanks 111 are respectively filled with an organic phosphorus series antiscalant, an organic phosphorus salt series antiscalant and silver, so as to utilize three different substances to achieve different effects.

[0059] It should be noted that the first end 101 of the tube body 10 is also provided with a plurality of grooves for placing seals to improve the sealing performance of the central tube 100. The grooves for placing seals are provided on one side of the receiving groove 11 close to the first end 101.

[0060] In some embodiments, the depths of the sub-troughs 111 are the same, so that the volume of each sub-trough 111 depends on the size of each sub-trough 111 along the axial direction X.

[0061] In this way, during the production and forming process of the central tube 100 , production personnel can quickly identify the substances in different sub-tanks 111 and understand what kind of functional filter material 20 should be placed in different sub-tanks 111 , thereby further improving the production and processing efficiency of the central tube 100 .

[0062] In some embodiments, the intervals between adjacent sub-troughs 111 are the same. This means that the intervals between every two adjacent sub-troughs 111 along the axial direction X are the same. Exemplarily, in an embodiment where there are three sub-troughs 111, the sub-troughs 111 are defined as the first sub-trough, the second sub-trough, and the third sub-trough along the axial direction X, respectively, and the interval between the first sub-trough and the second sub-trough is equal to the interval between the second sub-trough and the third sub-trough.

[0063] In some embodiments, the accommodating groove 11 is an annular groove, or the accommodating groove 11 is a plurality of grooves arranged along the circumference of the tube body 10 .

[0064] The receiving groove 11 is an annular groove, which means that the receiving groove 11 is a groove formed by being sunken from the outer surface of the tube body 10 toward the inner cavity, and the groove is formed around the axial direction X.

[0065] Accordingly, the receiving groove 11 is a plurality of grooves arranged along the circumference of the tube body 10, which means that the receiving groove 11 is a plurality of mutually independent grooves, and the plurality of grooves are arranged at intervals along the circumference of the tube body 10. In this way, since the receiving groove 11 is a plurality of mutually independent grooves, it is convenient to connect the functional filter material 20 with the receiving groove 11.

[0066] In these embodiments of the utility model, whether the receiving groove 11 is set as an annular groove or a plurality of grooves are set along the circumference of the tube body 10, its purpose is to make the functional filter material 20 evenly distributed around the periphery of the central tube 100, so as to further enhance the scale prevention and / or antibacterial effect of the functional filter material 20.

[0067] In some embodiments, the functional filter material 20 is pressed onto the tube body 10. A possible implementation is to first process different functional filter materials 20 into powder, press the powdered functional filter material 20 into the receiving tank 11 through a powder injection molding machine or a powder pressing machine, and connect it to the tube body 10.

[0068] In some embodiments, the functional filter material 20 may be attached to the tube body 10 through a powder coating device to form a coating of the functional filter material 20 .

[0069] The utility model further provides a reverse osmosis filter element, which comprises a central tube 100 provided in any of the above embodiments and a reverse osmosis membrane body wound on the central tube 100.

[0070] The utility model also provides a water purification device, which includes a reverse osmosis filter element as provided in any of the above embodiments.

[0071] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A central tube, applied to a reverse osmosis filter element, characterized in that: include: The tube body has an inner cavity, and a receiving groove is provided on a surface of the tube body away from the inner cavity; Functional filter material is contained in the containing tank and connected to the pipe body, and the functional filter material is used for preventing scale and / or inhibiting bacteria.

2. The central tube according to claim 1, characterized in that The number of the accommodating groove is at least one, and the accommodating groove is arranged at at least one end of the tube body along the axial direction.

3. The central tube according to claim 2, characterized in that The number of the containing tank is one, and the containing tank is arranged at the first end of the tube body, and the first end is configured to correspond to the concentrated water outlet end of the reverse osmosis filter element.

4. The central tube according to claim 2, characterized in that The number of the containing tanks is two, and the two containing tanks are respectively arranged at the first end and the second end of the tube body, and the first end is configured to correspond to the concentrated water outlet end of the reverse osmosis filter element; The volume of the containing groove arranged at the first end is greater than the volume of the containing groove arranged at the second end.

5. The central tube according to claim 2, characterized in that The receiving groove comprises a plurality of sub-grooves, and the plurality of sub-grooves are sequentially spaced along the axial direction of the tube body; The functional filter material includes a scale-inhibiting filter material and a bacteriostatic filter material, and one of the scale-inhibiting filter material and the bacteriostatic filter material is placed in a single sub-tank.

6. The central tube according to claim 5, characterized in that The depths of the sub-tanks are the same.

7. The central tube according to claim 1, characterized in that The accommodating groove is an annular groove, or the accommodating groove is a plurality of grooves arranged along the circumference of the tube body.

8. The central tube according to claim 1, characterized in that The functional filter material is pressed onto the tube body.

9. A reverse osmosis filter element, characterized in that: The invention comprises the central tube as claimed in any one of claims 1 to 8 and a reverse osmosis membrane body wound on the central tube.

10. A water purification device, characterized in that: Comprising the reverse osmosis filter element as claimed in claim 9.

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