Reverse osmosis membrane device and reverse osmosis membrane element

Abstract

The present application relates to reverse osmosis membrane device and reverse osmosis membrane element, wherein when a plurality of reverse osmosis membrane elements are assembled, the reverse assembly can be prevented, the center tube connector is saved, the water production resistance is reduced, and the water production is increased. It includes the element body with the center tube, the water inlet end stress resistor connected with the water inlet end of the element body, the water production end stress resistor connected with the water outlet end of the element body, wherein one of the water inlet end stress resistor and the water production end stress resistor has annular convex part protruding from the center tube, the other has annular concave cavity, the annular convex part and the annular concave cavity are respectively arranged around the center tube;When two reverse osmosis membrane elements are assembled, the annular convex part of one reverse osmosis membrane element can be inserted into the annular concave cavity of the other reverse osmosis membrane element and sealed in cooperation, and thereby the center tubes of the two reverse osmosis membrane elements are guided to be connected in alignment.

Description

TECHNICAL FIELD

[0001] The present application relates to a reverse osmosis membrane device and a reverse osmosis membrane element. BACKGROUND

[0002] Currently, industrial reverse osmosis membranes generally need to be connected together and installed in a membrane shell for use, and the number is generally 2-8. When installing, first confirm the water inlet direction of the membrane shell, prepare the first reverse osmosis membrane, adjust the water inlet direction of the first reverse osmosis membrane to be the same as the water inlet direction of the membrane shell, and then slowly fill the first reverse osmosis membrane into the membrane shell. Pause before completely filling, insert the center tube connector into the center tube of the first reverse osmosis membrane, adjust the direction of the second reverse osmosis membrane to be the same as the water inlet direction of the membrane shell, connect the water outlet end of the second reverse osmosis membrane to the water inlet end of the first reverse osmosis membrane through the center tube, and then slowly fill the second reverse osmosis membrane into the membrane shell. In this way, until the appropriate number of reverse osmosis membranes are installed in the membrane shell, the filling of a membrane shell is completed.

[0003] Currently, the stress resistors at both ends of the industrial reverse osmosis membrane are the same structure, only the raw water sealing ring is installed on the stress resistor at the water inlet end. The above method needs manual confirmation of the direction of the reverse osmosis membrane, and there is a possibility of confirmation error. If a reverse osmosis membrane is installed in the wrong direction, a large amount of raw water will flow through this reverse osmosis membrane from the outside of the glass shell, and the water production will decrease. In addition, there will be a connector in the center tube between every two reverse osmosis membranes, and the inner diameter of the connector is smaller than that of the center tube, which will cause water production resistance.

[0004] The end face self-locking technology of a product's reverse osmosis membrane is different from the stress resistor structure at the water inlet end and the water outlet end. The two are connected by rotating and clamping and sandwiching an axial sealing ring in the middle to isolate the raw water and the produced water. Although the center tube connector can be removed, the rotating and clamping method is relatively cumbersome to operate when installing and removing the reverse osmosis membrane, which may damage the stress resistor and thus lose a reverse osmosis membrane. In addition, the sealing ring part and the rotating and clamping part will occupy a large area, affecting the flow of raw water. SUMMARY

[0005] An object of the present application is to provide a reverse osmosis membrane element that can prevent installation in the wrong direction, save the center tube connector, reduce water production resistance, and increase water production when a plurality of reverse osmosis membrane elements are assembled in a reverse osmosis membrane device.

[0006] Another object of the present application is to provide a reverse osmosis membrane device comprising the aforementioned reverse osmosis membrane element.

[0007] The reverse osmosis membrane element for realizing the purpose comprises an element body with a central tube, a water inlet end stress absorber connected to the water inlet end of the element body, and a water outlet end stress absorber connected to the water outlet end of the element body, wherein one of the water inlet end stress absorber and the water outlet end stress absorber has a ring-shaped convex part protruding from the central tube, and the other has a ring-shaped concave cavity, and the ring-shaped convex part and the ring-shaped concave cavity are arranged around the central tube respectively; when two reverse osmosis membrane elements are assembled, the ring-shaped convex part of one reverse osmosis membrane element can be inserted into the ring-shaped concave cavity of the other reverse osmosis membrane element and sealingly matched, thereby guiding the central tubes of the two reverse osmosis membrane elements to be aligned and connected.

[0008] In one or more embodiments, a sealing ring is arranged on the ring-shaped convex part, and the sealingly matching of the ring-shaped convex part and the ring-shaped concave cavity is realized by means of the sealing ring.

[0009] In one or more embodiments, the ring-shaped convex part, the ring-shaped concave cavity and the central tube are coaxial.

[0010] In one or more embodiments, the ring-shaped convex part and the ring-shaped concave cavity are arranged around the outer peripheral surface of the central tube respectively.

[0011] In one or more embodiments, the outer peripheral surface of the central tube corresponds to the outer peripheral surface of the ring-shaped concave cavity to define the ring-shaped concave cavity.

[0012] In one or more embodiments, a sealing ring is arranged between the outer peripheral surface of the ring-shaped convex part and the outer peripheral surface of the ring-shaped concave part, thereby enabling the sealingly matching of the ring-shaped convex part and the ring-shaped concave part.

[0013] In one or more embodiments, the water inlet end stress absorber is connected to the central tube by means of spin fusion, and the ring-shaped concave cavity is formed between the central tube and the water inlet end stress absorber after being connected in place.

[0014] In one or more embodiments, the water outlet end stress absorber is connected to the central tube by means of spin fusion, and the ring-shaped convex part protruding from the central tube is formed after being connected in place.

[0015] In one or more embodiments, the ring-shaped convex part has two sealing ring grooves, and rubber sealing rings are arranged in the sealing ring grooves.

[0016] A reverse osmosis device comprises a membrane shell and a plurality of reverse osmosis membrane elements, wherein the reverse osmosis membrane element is any of the reverse osmosis membrane elements.

[0017] The foregoing technical solution does not use a central tube connector, saves cost, and can also reduce water production resistance, slightly increase water production, and has the characteristics of avoiding reverse installation and facilitating installation and removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0019] Figure 1 It is a half-section view of the stress resistor at the water production end of the reverse osmosis membrane element.

[0020] Figure 2 It is a half-section view of the stress resistor at the water inlet end of the reverse osmosis membrane element.

[0021] Figure 3 This is a schematic diagram of two reverse osmosis membrane elements after docking. DETAILED DESCRIPTION

[0022] The following discloses a variety of different implementation methods or examples of the subject technical solutions. To simplify the disclosure, specific examples of the various elements and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of protection of the present invention. For example, a first feature described later in the specification is formed above or on a second feature, which may include an implementation method in which the first and second features are formed in a directly connected manner, or an implementation method in which an additional feature is formed between the first and second features, so that the first and second features may not be directly connected. In addition, the disclosures may repeat the figure marks and / or letters in different examples. This repetition is for brevity and clarity and does not in itself represent the relationship between the various implementation methods and / or structures to be discussed. Further, when a first element is described in a manner connected to or combined with a second element, the description includes an implementation method in which the first and second elements are directly connected or combined with each other, and also includes an implementation method in which one or more other intervening elements are added to indirectly connect or combine the first and second elements.

[0023] Figure 1 A schematic diagram of a stress resistor at the water production end of a reverse osmosis membrane element is shown. Figure 2 A schematic diagram of the stress resistor at the water inlet end of the reverse osmosis membrane element is shown. Figure 3 The figure shows the schematic diagram of the connection between the stress relief device at the water production end and the stress relief device at the water inlet end of two reverse osmosis membrane elements. Figure 1 and Figure 2 It can also be understood that Figure 3 Characteristics of the water-producing end stress resistor and the water-inlet end stress resistor of different reverse osmosis membrane elements.

[0024] like Figure 1 and Figure 2As shown, the reverse osmosis membrane element comprises an element body with a central tube 11, a water inlet end stress absorber 3 connected to the water inlet end of the element body, and a water outlet end stress absorber 2 connected to the water outlet end of the element body. The element body is not shown in the figure, which is usually a spiral reverse osmosis membrane made of multiple layers of spiral membrane with multiple functions.

[0025] The water outlet end stress absorber 2 has an annular protrusion 21 protruding from the central tube, and the water inlet end stress absorber 3 has an annular cavity 31. The annular protrusion 21 and the annular cavity 31 are arranged around the central tube 11 respectively. In another embodiment, the annular protrusion is arranged in the water inlet end stress absorber, and the annular cavity is arranged in the water outlet end stress absorber.

[0026] As shown in Figure 3 When two reverse osmosis membrane elements are assembled, the annular protrusion 21 of one reverse osmosis membrane element can be inserted into the annular cavity 31 of the other reverse osmosis membrane element and sealed therein, thereby guiding the central tubes 11 of the two reverse osmosis membrane elements to be aligned.

[0027] In combination Figure 3 When assembling the reverse osmosis membrane device, after the first reverse osmosis membrane element is installed, the water inlet end stress absorber of the first reverse osmosis membrane element is slightly leaked out of the membrane shell (not shown in the figure), and then the water outlet end stress absorber 2 of the second reverse osmosis membrane element is aligned with the water inlet end stress absorber 3 of the first reverse osmosis membrane element, and the annular protrusion 21 is inserted into the annular cavity 31 of the water inlet end stress absorber of the first reverse osmosis membrane element, and then the second reverse osmosis membrane element is pushed and slowly filled into the membrane shell, and the installation of the second reverse osmosis membrane element is completed. It can be understood that other reverse osmosis membrane elements can be installed in this way.

[0028] Continuing to refer to Figure 3 It can be understood that the advantages of the foregoing embodiments are:

[0029] The two reverse osmosis membrane elements connected by the annular protrusion and the annular cavity do not need a central tube connector, and without the central tube connector, the effective aperture of the central tube is not reduced, thus not causing water outlet resistance and slightly increasing water production.

[0030] In addition, the water inlet end stress absorber and the water outlet end stress absorber have different structures, which can avoid the installation of reverse osmosis membranes caused by human judgment errors.

[0031] The two reverse osmosis membrane elements are connected by the sealing fit of the annular protrusion and the annular cavity, which is convenient and fast for installation and disassembly.

[0032] While one embodiment of a reverse osmosis membrane element has been described above, in other embodiments, there can be more detail relative to the above-described embodiment, and at least some of these details can have variations. At least some of these details and variations are described below in some embodiments.

[0033] As shown in Figure 1 , the annular protrusion 21 of the water outlet end stress resistor 2 is provided with a sealing ring 4, and the sealing ring 4 of the water outlet end stress resistor 2 realizes the sealing cooperation of the annular protrusion 21 of the water outlet end stress resistor 2 and the annular cavity 21 of the water inlet end stress resistor 3. Thus, the sealing effect is good, and the area where the sealing ring is located forms a closed space, which can resist part of the high pressure of the raw water and prevent the raw water from entering the water outlet central pipe.

[0034] Figure 3 As shown in , the annular protrusion of the water outlet end stress resistor, the annular cavity of the water inlet end stress resistor, and the central pipe share the center line.

[0035] Figure 1 As shown in Figure 2 , the annular protrusion 21 and the annular cavity 31 share the center line X with the central pipe 11.

[0036] Continuing to refer to Figure 1 , Figure 2 , the annular protrusion 21 and the annular cavity 31 are respectively arranged around the outer peripheral surface of the central pipe 11, and the annular protrusion 21 and the annular cavity 31 are arranged as close to the center as possible, so that the structure of the water outlet end stress resistor 2 and the water inlet end stress resistor 3 is changed as little as possible.

[0037] As shown in Figure 2 , the outer peripheral surface 110 of the central pipe 11 corresponding to the annular cavity 31 defines the annular cavity, so the surface of the annular cavity includes the material surface of the water inlet end stress resistor 3 and the material surface of the central pipe 11.

[0038] As shown in Figures 1 to 3 , a sealing ring 4 is arranged between the outer peripheral surface of the annular protrusion 21 and the outer peripheral surface of the annular cavity 31, thereby enabling the annular protrusion 21 and the annular cavity 31 to sealingly cooperate.

[0039] In one embodiment, the water inlet end stress resistor 3 is connected to the central pipe 11 by fusion spinning, and after being connected in place, the annular cavity 31 is formed between the central pipe 11 and the water inlet end stress resistor 3.

[0040] In one embodiment, the water outlet end stress resistor 2 is also connected to the central pipe 11 by fusion spinning, and after being connected in place, the annular protrusion 21 is formed which protrudes from the central pipe 11.

[0041] As shown in Figure 2As shown, the annular convex part 21 has two sealing ring grooves, and rubber sealing rings 4 are installed in the sealing ring grooves.

[0042] Although the present application is disclosed with the preferred embodiments, it is not intended to limit the present application, any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application, all fall within the protection scope defined by the claims of the present application.

Claims

1. A reverse osmosis membrane element comprising an element body having a central tube, a water inlet end stress relief device connected to the water inlet end of the element body, and a water production end stress relief device connected to the water outlet end of the element body, characterized in that: One of the water inlet end stress resistor and the water production end stress resistor has an annular convex portion protruding from the central tube, and the other has an annular concave cavity, and the annular convex portion and the annular concave cavity are respectively arranged around the central tube; when the two reverse osmosis membrane elements are assembled, the annular convex portion of one reverse osmosis membrane element can be inserted into the annular concave cavity of the other reverse osmosis membrane element and sealed, thereby guiding the central tubes of the two reverse osmosis membrane elements to align and connect; The annular convex portion and the annular concave cavity are respectively arranged around the outer peripheral surface of the central tube; a sealing ring is arranged between the outer peripheral surface of the annular convex portion and the outer peripheral surface of the annular concave cavity, thereby making the annular convex portion and the annular concave cavity sealed and matched.

2. The reverse osmosis membrane element according to claim 1, wherein A sealing ring is provided on the annular convex portion, and a sealing fit between the annular convex portion and the annular concave cavity is achieved by means of the sealing ring.

3. The reverse osmosis membrane element according to claim 1, wherein The annular convex portion, the annular concave cavity and the central tube are arranged to form a common center line.

4. The reverse osmosis membrane element according to claim 1, wherein The central tube defines the annular cavity on an outer peripheral surface corresponding to the annular cavity.

5. The reverse osmosis membrane element according to claim 1, wherein The water inlet end stress reducer is connected to the central tube by a rotational fusion method, and after the connection is in place, the annular concave cavity is formed between the central tube and the water inlet end stress reducer.

6. The reverse osmosis membrane element according to claim 1, wherein The water-producing end stress resister is connected to the central tube by a rotational fusion method. After being connected in place, an annular convex portion protruding from the central tube is formed.

7. The reverse osmosis membrane element according to claim 6, characterized in that The annular convex portion has two sealing ring grooves, and rubber sealing rings are installed in the sealing ring grooves.

8. A reverse osmosis device comprising a membrane shell and a plurality of reverse osmosis membrane elements, characterized in that: The reverse osmosis membrane element is the reverse osmosis membrane element according to any one of claims 1 to 7.

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