A shell structure

Abstract

The present invention belongs to the field of membrane separation, and discloses a shell structure. The shell structure includes a cylindrical main body, and both ends of the main body are provided with flexible sheets arranged in a circumferential direction, and at least part of the flexible sheet is provided with a concave-convex structure. The shell structure of some embodiments of the present invention greatly increases the contact area between the top of the flexible sheet and the potting glue through the special structural design of the top of the flexible sheet, and achieves good glue hanging, thereby improving the sealing effect between the fiber bundle and the shell and reducing the defective rate. The shell structure of some embodiments of the present invention, by setting a concave-convex structure with a reasonable structure, makes the product easy to demould, simple to process, and low in cost.

Description

Technical Field

[0001] The invention belongs to the field of membrane separation, and in particular relates to a shell structure. Background Art

[0002] Hollow fiber membrane separation devices generally include a cylindrical shell, a hollow fiber bundle, a sealing layer and end caps. For environmental protection and safety, the cylindrical shell is mostly made of polypropylene. The membrane separation device is a pipe and container for solute exchange between two fluids. The membrane separation device is divided into two flow spaces by the above structure. The hollow fiber bundle is placed in the cylindrical shell, and both sides are sealed with non-toxic potting glue and fixed to the shell. The hollow fiber opens outside the sealing layer and the outer ends are closed with end caps at both ends to form a first fluid channel, and the gap between the outer layer of the fiber bundle and the shell forms a second fluid channel.

[0003] During the processing of the membrane separation device, the sealing and fixation of the hollow fiber bundle and the shell is the key process of the membrane separation device. Since the potting glue will shrink to a certain extent when curing and sealing, in order to prevent large stress from being generated in the sealing part, circumferentially separated flexible sheets need to be arranged at both ends of the shell. A part of the top of the flexible sheet is embedded in the sealing layer, which can achieve sealing without generating large stress concentration.

[0004] Although the circumferentially separated flexible sheets solve the stress problem, the non-toxic potting glue cannot be well retained on the sealed part when the hollow fiber bundle is sealed with the shell, that is, there is a risk of the potting glue falling off, the sealing effect is poor, and a series of problems such as high processing defective rate occur. Plasma treatment of the surface of the flexible sheet can reduce the risk of the potting glue falling off, but this adds additional operations, increases the processing difficulty of the product, and increases the processing cost.

[0005] In order to reduce the resistance of the liquid and facilitate the potting glue to contact the flexible sheet more evenly, people often set the flexible sheet to have a smooth surface. The smooth surface of the flexible sheet is also conducive to the design of the mold and the demoulding process during the production process. Summary of the invention

[0006] An object of the present invention is to overcome at least one disadvantage of the prior art and provide a housing structure.

[0007] The technical solution adopted by the present invention is:

[0008] A shell structure comprises a cylindrical main body, both ends of which are provided with flexible sheets which are circumferentially spaced and arranged, and at least part of the flexible sheets is provided with a concave-convex structure.

[0009] In some examples of the shell structure, the concave-convex structure has at least one of the following characteristics:

[0010] The height difference between the upper and lower surfaces of the concave-convex structure is greater than 0 and does not exceed 5 mm;

[0011] The concave-convex structure is a continuous groove or protrusion, forming a thread;

[0012] The concave-convex structure is a concave hole or convex point structure, which is arranged regularly or irregularly;

[0013] The concave-convex structure is a concave hole or convex point structure, and the center distance between adjacent concave holes or convex points is 1 to 20 mm;

[0014] The concave-convex structure is frosted;

[0015] The total area of ​​the concave-convex structure is 10 to 60% of the total area of ​​the flexible sheet.

[0016] In some examples of the housing structure, a fork is provided at the top end of the flexible sheet; and / or a width of the flexible sheet at one end close to the main body is greater than a width at one end away from the main body.

[0017] In some examples of the housing structure, the spacing between the flexible sheets is 0-20 mm; and / or the total number of flexible sheets at one end is 18.

[0018] In some examples of the housing structure, the spacing between the forks of the same flexible sheet is 0-10 mm; and / or at least one side of the fork is provided with the concave-convex structure.

[0019] In some examples of the shell structure, the concave-convex structure is distributed on the surface and / or side of the flexible sheet.

[0020] In some examples of the housing structure, the concave-convex structure is distributed on at least one side of the flexible sheet.

[0021] In some examples of the housing structure, one end of the flexible sheet close to the main body has a smooth surface.

[0022] In some examples of the housing structure, the concave-convex structure is distributed at the free end of the flexible sheet.

[0023] In some examples of housing structures, the housing structure is made of thermoplastic.

[0024] In some examples of housing structures, the thermoplastic is polypropylene.

[0025] The beneficial effects of the present invention are:

[0026] The shell structure of some embodiments of the present invention greatly increases the contact area between the top of the flexible sheet and the potting glue through the special structural design of the top of the flexible sheet, achieves good glue hanging, thereby improving the sealing effect between the fiber bundle and the shell and reducing the defective rate.

[0027] The shell structure of some embodiments of the present invention, by providing a reasonably structured concave-convex structure, allows the product to be easily demoulded, is simple to process, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the shell structure of some examples of the present invention.

[0029] Figure 2 to Figure 8 Schematic diagrams of the structures of flexible sheets according to some embodiments of the present invention. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0035] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0036] Reference Figures 1 to 8 A shell structure comprises a cylindrical main body 1, both ends of the main body 1 are provided with circumferentially spaced flexible sheets 2, at least part of the flexible sheet 2 is provided with a concave-convex structure 3.

[0037] In some examples of the shell structure, the height difference between the upper and lower surfaces of the concave-convex structure is greater than 0 and does not exceed 5 mm. Data show that under this height difference, it is convenient to use the mold to demould once and also can make the potting glue hang well.

[0038] In some examples of housing structures, the concave-convex structure is a continuous groove or protrusion, forming a thread, so that the potting glue can form a thread in the concave-convex structure, and the combination is tighter.

[0039] In some examples of the shell structure, the concave-convex structure is a concave hole or a convex point structure, which is arranged regularly or irregularly.

[0040] In some examples of shell structures, the concave-convex structure is a concave hole or convex point structure, and the center spacing of adjacent concave holes or convex points is 1 to 20 mm. The center spacing can also be adjusted accordingly as needed, such as 1 to 15 mm, 1 to 10 mm, 2 to 15 mm, 2 to 12 mm, etc.

[0041] In some examples of the housing structure, the concave-convex structure is a frosted surface, which can increase the contact area between the potting glue and the flexible sheet, and the frosted surface is also easy to prepare and can be demoulded in one time, which is conducive to reducing production costs.

[0042] In some examples of the shell structure, the total area of ​​the concave-convex structure is 10-60% of the total area of ​​the flexible sheet, preferably 20-60%, 30-60%.

[0043] In some examples of the housing structure, a fork 21 is provided at the top of the flexible sheet 2. By providing the fork, the top portion of the flexible sheet can be more easily bent and deformed, which is more conducive to reducing the stress generated when the potting glue is cured.

[0044] In some examples of shell structures, the width of the flexible sheet near one end of the main body is greater than the width away from the other end of the main body. The inclined design can facilitate demolding of the shell during injection molding, and at the same time can make the top part of the flexible sheet easier to bend and deform, which is more conducive to reducing the stress generated when the potting glue is cured.

[0045] The spacing of the flexible sheets can be adjusted accordingly according to the size of the cylindrical body to meet the needs of housing structures of different sizes. In some examples of housing structures, the spacing of the flexible sheets is 0-20 mm, 1-15 mm, or 1-10 mm.

[0046] In some examples of the housing structure, the total number of flexible sheets at one end of the cylindrical body 1 is 18. Data show that 18 flexible sheets can ensure the mechanical strength of both ends of the housing, ensure that the housing will not deform when connected and sealed, and the flexible sheets are not easy to break.

[0047] In some examples of the housing structure, the spacing between the forks 21 of the same flexible sheet 2 is 0-10 mm.

[0048] In some examples of the housing structure, at least one side of the fork 21 is provided with the concave-convex structure 3. In some examples of the housing structure, the concave-convex structure 3 is distributed on at least one side of the flexible sheet 2. This can increase the contact area between the potting glue and the concave-convex structure, and can reduce or even prevent the potting glue from further flowing to the lower end of the flexible sheet, which has an adverse effect on the flow of the liquid.

[0049] In some examples of the shell structure, the concave-convex structure 3 is distributed on the surface and / or side of the flexible sheet 2 .

[0050] In some examples of housing structures, the end of the flexible sheet close to the main body is a smooth surface. The end of the flexible sheet close to the main body forms a flow channel, which is a smooth surface, which is more conducive to reducing the resistance of fluid flow and is convenient for subsequent use.

[0051] The free end of the flexible sheet is the main potting glue curing area. In some examples of the shell structure, the concave-convex structure is distributed at the free end of the flexible sheet, so that the glue can be better hung and the potting glue can be prevented from flowing down to the end of the cylindrical body.

[0052] In some examples of housing structures, the housing structure is made of thermoplastic.

[0053] In some examples of housing structures, the thermoplastic is polypropylene.

[0054] Embodiment 1:

[0055] A shell structure comprises a cylindrical main body 1, the diameter of the cylindrical main body 1 is 32-44 mm, and the length is 250-280 mm. Two ends of the main body 1 are provided with 18 circumferentially spaced flexible sheets 2, the length of the flexible sheets 2 is 10-40 mm, and the bottom width is 2-15 mm. A symmetrical fork 21 is provided at the 1 / 2 position of the flexible sheet, and a concave-convex structure 3 is provided on the outer edge of the fork 21, and the height difference between the upper and lower surfaces of the concave-convex structure 3 is 0-3 mm.

[0056] The above is a further detailed description of the present invention, which should not be regarded as a limitation on the specific implementation of the present invention. For ordinary technicians in the technical field to which the present invention belongs, simple deduction or replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A shell structure, comprising a cylindrical body, with flexible sheets arranged circumferentially spaced apart at both ends of the body, characterized in that: At least part of the flexible sheet is provided with a concave-convex structure, the top of the flexible sheet is provided with a fork, the width of the flexible sheet at one end close to the main body is greater than the width at one end away from the main body, the end of the flexible sheet close to the main body is a smooth surface, the concave-convex structure is distributed at the free end of the flexible sheet, and the total area of ​​the concave-convex structure is 10-60% of the total area of ​​the flexible sheet; The concave-convex structure has at least one of the following characteristics: The height difference between the upper and lower surfaces of the concave-convex structure is greater than 0 and does not exceed 5 mm; The concave-convex structure is a continuous groove or protrusion, forming a thread; The concave-convex structure is a concave hole or convex point structure, which is arranged regularly or irregularly; The concave-convex structure is a concave hole or convex point structure, and the center distance between adjacent concave holes or convex points is 1 to 20 mm; The concave-convex structure is frosted.

2. The housing structure according to claim 1, characterized in that: The spacing between the flexible sheets is 0-20 mm; and / or the total number of flexible sheets at one end is 18.

3. The housing structure according to claim 2, characterized in that: The spacing between the forks of the same flexible sheet is 0-10 mm; and / or at least one side of the fork is provided with the concave-convex structure.

4. The housing structure according to claim 1, characterized in that: The concave-convex structure is distributed on the surface and / or side of the flexible sheet.

5. The housing structure according to claim 1, characterized in that: The concave-convex structure is distributed on at least one side of the flexible sheet.

6. The housing structure according to claim 1, characterized in that: The housing structure is made of thermoplastic.

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