CN112933972A - Reverse osmosis membrane device and reverse osmosis membrane element - Google Patents

Abstract

The present invention relates to a reverse osmosis membrane device and a reverse osmosis membrane element, wherein when a plurality of reverse osmosis membrane elements are assembled, reverse assembly can be prevented, a central tube connector can be omitted, water production resistance can be reduced, and water production can be increased. The stress-resistant element comprises an element body with a central tube, a water inlet end stress-resistant device connected with a water inlet end of the element body, and a water production end stress-resistant device connected with a water outlet end of the element body, wherein one of the water inlet end stress-resistant device and the water production end stress-resistant device is provided with an annular convex part protruding out of the central tube, the other one of the water inlet end stress-resistant device and the water production end stress-resistant device is provided with an annular concave cavity, and the annular convex part and the annular concave cavity are respectively arranged around the central; when two such reverse osmosis membrane elements are assembled, the annular protrusion of one reverse osmosis membrane element can be inserted into the annular cavity of the other reverse osmosis membrane element and sealingly engaged therewith, thereby guiding the central tubes of the two reverse osmosis membrane elements into aligned connection.

Description

Reverse osmosis membrane device and reverse osmosis membrane element

Technical Field

The present invention relates to a reverse osmosis membrane device and a reverse osmosis membrane element.

Background

At present, industrial reverse osmosis membranes generally need a plurality of connected membranes to be installed in a membrane shell for use, the number of the connected membranes is generally 2-8, during installation, the water inlet direction of the membrane shell is firstly confirmed, a first reverse osmosis membrane is prepared, the water inlet direction of the first reverse osmosis membrane is adjusted to be the same as the water inlet direction of the membrane shell, and then the first reverse osmosis membrane is slowly filled into the membrane shell. Before the filling is completed, the central pipe connector is suspended, the central pipe connector is inserted into the central pipe of the first reverse osmosis membrane, the direction of the second reverse osmosis membrane is adjusted to be the same as the water inlet direction of the membrane shell, the water outlet end of the second reverse osmosis membrane is connected with the water inlet end of the first reverse osmosis membrane through the central pipe, then the second reverse osmosis membrane is slowly filled into the membrane shell, and the like until the reverse osmosis membranes with proper quantity are filled into the membrane shell, and the filling of one membrane shell is completed.

At present, the anti-stress devices at two ends of an industrial reverse osmosis membrane have the same structure, only a raw water sealing ring is arranged on the anti-stress device at a water inlet end, the direction of the reverse osmosis membrane needs to be confirmed manually by the method, the condition of error confirmation exists, if one reverse osmosis membrane is reversely arranged, a large amount of raw water flows through the reverse osmosis membrane from the outer side of a glass fiber reinforced plastic shell, and the water yield is reduced. In addition, a connector is arranged between the central pipes of each two reverse osmosis membranes, and the inner diameter of the connector is smaller than that of the central pipe, so that water production resistance is caused.

The end face self-locking technology of the reverse osmosis membrane of the product has the advantages that the structure of the water inlet end and the structure of the stress resisting device at the water production end are different, the water inlet end and the water production end are isolated by rotating the mode that the clamping is matched and an axial sealing ring is clamped in the middle, although a central pipe connector can be omitted, the operation is complex when the reverse osmosis membrane is installed and detached by rotating the clamping mode, the stress resisting device can be damaged, and then one reverse osmosis membrane is lost. In addition, the sealing ring part and the rotary clamping part occupy larger area and influence the flow of raw water.

Disclosure of Invention

An object of the present invention is to provide a reverse osmosis membrane element which can prevent reverse installation, omit a center tube connector, reduce resistance to water production, and increase water production when a plurality of reverse osmosis membrane elements are assembled in a reverse osmosis membrane device

Another object of the present invention is to provide a reverse osmosis membrane device comprising the aforementioned reverse osmosis membrane element.

The reverse osmosis membrane element comprises an element body with a central tube, a water inlet end stress preventer connected with a water inlet end of the element body, and a water production end stress preventer connected with a water outlet end of the element body, wherein one of the water inlet end stress preventer and the water production end stress preventer is provided with an annular convex part protruding out of the central tube, the other one is provided with an annular concave cavity, and the annular convex part and the annular concave cavity are respectively arranged around the central tube; when two reverse osmosis membrane elements are assembled, the annular protrusion of one reverse osmosis membrane element can be inserted into the annular cavity of the other reverse osmosis membrane element and sealingly engaged, thereby guiding the central tubes of the two reverse osmosis membrane elements into aligned connection.

In one or more embodiments, a sealing ring is provided on the annular projection, by means of which sealing engagement of the annular projection and the annular cavity is achieved.

In one or more embodiments, the annular protrusion, the annular cavity, and the center tube are concentric.

In one or more embodiments, the annular protrusion and the annular cavity are respectively disposed around an outer circumferential surface of the central tube.

In one or more embodiments, the central tube defines the annular cavity corresponding to an outer peripheral surface of the annular cavity.

In one or more embodiments, a seal ring is disposed between an outer circumferential surface of the annular convex portion and an outer circumferential surface of the annular concave portion, thereby allowing the annular convex portion and the annular concave portion to be in sealing engagement.

In one or more embodiments, the inlet end stress preventer is connected to the central tube by a rotational fusion method, and the annular cavity is formed between the central tube and the inlet end stress preventer after the connection is in place.

In one or more embodiments, the stress-resistant device at the water production end is connected with the central pipe in a spinning and melting mode, and after the stress-resistant device is connected in place, the annular convex part protruding out of the central pipe is formed.

In one or more embodiments, the annular protrusion has two seal ring grooves, and a rubber seal ring is mounted in the seal ring groove.

A reverse osmosis device comprises a membrane shell and a plurality of reverse osmosis membrane elements, wherein the reverse osmosis membrane elements are any reverse osmosis membrane element.

The central pipe connector is not used in the technical scheme, so that the cost is saved, the water production resistance can be reduced, the water yield is improved in a small range, and the characteristics of reverse installation prevention and convenience in assembly and disassembly are realized.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a half sectional view of a water producing end stress preventer of a reverse osmosis membrane element.

FIG. 2 is a half sectional view of a water inlet end stress resistor of a reverse osmosis membrane element.

FIG. 3 is a schematic illustration of two reverse osmosis membrane elements after docking.

Detailed Description

The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

FIG. 1 shows a schematic of a water-producing end stress preventer of a reverse osmosis membrane element. Fig. 2 shows a schematic diagram of a water inlet end stress preventer of the reverse osmosis membrane element. Fig. 3 shows a schematic diagram of the butt joint of the stress preventers at the water production end and the stress preventers at the water inlet end of two reverse osmosis membrane elements. The characteristics of the water production end anti-stress device and the water inlet end anti-stress device of the reverse osmosis membrane element different from that in fig. 3 can also be understood from fig. 1 and 2.

As shown in fig. 1 and 2, the reverse osmosis membrane element comprises an element body having a central tube 11, a water inlet end stress preventer 3 connecting the water inlet end of the element body, and a water production end stress preventer 2 connecting the water outlet end of the element body. The element body, which is not shown in the drawings, is generally a rolled reverse osmosis membrane, which is wound of a plurality of membrane sheets having various functions.

The water production end stress preventer 2 is provided with an annular convex part 21 protruding out of the central pipe, the water inlet end stress preventer 3 is provided with an annular concave cavity 31, and the annular convex part 21 and the annular concave cavity 31 are respectively arranged around the central pipe 11. In another embodiment, in contrast, the annular projection is arranged at the intake end stress preventer and the annular cavity is arranged at the production end stress preventer.

As shown in fig. 3, when the two reverse osmosis membrane elements are assembled, the annular protrusion 21 of one reverse osmosis membrane element can be inserted into the annular recess 31 of the other reverse osmosis membrane element and sealingly engaged therewith, thereby guiding the central tubes 11 of the two reverse osmosis membrane elements into aligned connection.

Referring to fig. 3, in assembling the reverse osmosis membrane device, after the first reverse osmosis membrane element is mounted, the inlet end anti-stress device of the first reverse osmosis membrane element slightly leaks out of the membrane housing (not shown in the figure), then the outlet end anti-stress device 2 of the second reverse osmosis membrane element is aligned with the inlet end anti-stress device 3 of the first reverse osmosis membrane element, the annular protrusion 21 mounted thereon is inserted into the annular cavity 31 of the inlet end anti-stress device of the first reverse osmosis membrane element, and then the second reverse osmosis membrane element is pushed to be slowly filled into the membrane housing, thereby completing the mounting of the second reverse osmosis membrane element. It will be appreciated that other reverse osmosis membrane elements may be installed in this manner of assembly.

With continued reference to FIG. 3, it can be appreciated that the benefits of the foregoing embodiments are:

the inner parts of the two butted reverse osmosis membrane elements do not use a central tube connector, and the effective aperture of the central tube is not reduced because the central tube connector is not used, so that the water production resistance is not caused, and the water production can be improved in a small degree.

In addition, the inlet end stress resisting device and the outlet end stress resisting device are different in structure, and reverse osmosis membrane reverse installation caused by human judgment errors is avoided.

The two reverse osmosis membrane elements are connected through the sealing fit of the annular convex part and the annular concave cavity, and the filling and the dismounting are convenient and fast.

While one embodiment of a reverse osmosis membrane element is described above, in other embodiments, there may be many more details relative to the above-described embodiments, and at least some of these details may vary widely. At least some of these details and variations are described below in several embodiments.

As shown in fig. 1, the annular convex portion 21 of the water production end stress preventer 2 is provided with a sealing ring 4, and the sealing fit of the annular convex portion 21 of the water production end stress preventer 2 and the annular cavity 21 of the water inlet end stress preventer 3 is realized by means of the sealing ring 4 of the water production end stress preventer 2. Therefore, the sealing effect is good, a closed space can be formed in the area where the sealing ring is located, the high pressure of part of raw water can be resisted, and the raw water is prevented from entering the water production central pipe.

Fig. 3 shows that the annular convex part of the stress-resistant device at the water production end, the annular cavity of the stress-resistant device at the water inlet end and the central pipe are concentric.

As shown in fig. 1 and 2, the annular protrusion 21 and the annular cavity 31 are concentric with the center tube 11.

With continued reference to fig. 1 and 2, the annular protrusion 21 and the annular cavity 31 are respectively disposed around the outer circumferential surface of the central tube 11, and the annular protrusion 21 and the annular cavity 31 are disposed as close to the center as possible, so that the structure of the stress preventer 2 at the water production end and the stress preventer 3 at the water intake end is changed less.

As shown in fig. 2, the central tube 11 defines an annular cavity corresponding to the outer peripheral surface 110 of the annular cavity 31, and therefore the face of the annular cavity includes the material surface of the water inlet end stress preventer 3 and the material surface of the central tube 11.

As shown in fig. 1 to 3, a seal ring 4 is provided between the outer peripheral surface of the annular convex portion 21 and the outer peripheral surface of the annular concave portion 31, whereby the annular convex portion 21 and the annular concave portion 31 are sealingly engaged.

In one embodiment, the intake end stress preventer 3 is attached to the central tube 11 by a rotational fusion process, which when in place forms an annular cavity 31 between the central tube 11 and the intake end stress preventer 3.

In one embodiment, the production end stress protector 2 is also attached to the base pipe 11 by a spin-on process, and when attached in place, forms an annular protrusion 21 protruding from the base pipe 11.

As shown in fig. 2, the annular protrusion 21 has two seal grooves, and the rubber seal 4 is mounted in the seal grooves.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims (10)

1. A reverse osmosis membrane element comprising an element body having a central tube, a water inlet end stress preventer connected to a water inlet end of the element body, and a water production end stress preventer connected to a water outlet end of the element body, wherein one of the water inlet end stress preventer and the water production end stress preventer has an annular protrusion protruding from the central tube, and the other has an annular cavity, and the annular protrusion and the annular cavity are respectively disposed around the central tube; when two reverse osmosis membrane elements are assembled, the annular protrusion of one reverse osmosis membrane element can be inserted into the annular cavity of the other reverse osmosis membrane element and sealingly engaged, thereby guiding the central tubes of the two reverse osmosis membrane elements into aligned connection.

2. The reverse osmosis membrane element of claim 1, wherein the annular projection is provided with a sealing ring by means of which sealing engagement of the annular projection and the annular cavity is achieved.

3. The reverse osmosis membrane element of claim 1, wherein the annular projection, the annular cavity and the central tube are disposed concentrically.

4. The reverse osmosis membrane element of claim 1, wherein the annular projection and the annular cavity are each disposed around an outer peripheral surface of the central tube.

5. The reverse osmosis membrane element of claim 1, wherein the central tube defines the annular cavity in correspondence with an outer peripheral surface of the annular cavity.

6. A reverse osmosis membrane element according to claim 1, wherein a sealing ring is disposed between the outer peripheral surface of said annular protrusion and the outer peripheral surface of said annular recess, whereby said annular protrusion and said annular recess are sealingly engaged.

7. The reverse osmosis membrane element of claim 1, wherein the inlet end stress resistor is attached to the central tube by rotational fusion, the annular cavity being formed between the central tube and the inlet end stress resistor when attached in place.

8. A reverse osmosis membrane element according to claim 1 wherein said stress relief means at the water production end is connected to said central tube by a rotational fusion, and when in place, forms said annular projection projecting from the central tube.

9. The reverse osmosis membrane element of claim 8, wherein the annular protrusion has two gasket grooves with rubber gaskets mounted therein.

10. A reverse osmosis plant comprising a membrane shell and a plurality of reverse osmosis membrane elements, wherein the reverse osmosis membrane elements are as claimed in any one of claims 1 to 9.

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