A reinforced structure for an end cap of a spiral-wound membrane element

Abstract

The utility model discloses a kind of reinforced structures of roll type membrane element end cover, belong to reverse osmosis membrane element technical field.The structure includes end cover body and card strip grid.The end cover body includes outer ring, inner ring and multiple end cover support skeletons connecting outer ring and inner ring, the inner circumferential surface of the outer ring is circumferentially distributed with multiple for detachable connection reverse type buckle cooperation structure;The protruding buckle that the card strip grid two ends are equipped with is matched with the reverse type buckle cooperation structure;Multiple the card strip grid is connected between two end cover bodies by the cooperation structure, and form adjustable overall support frame.The utility model is through above-mentioned modular adjustable combination structure, the significant improvement of end cover strength and the balanced adaptation to different diameter membrane element are realized, effectively disperses stress, avoid the problem such as end cover cracking and glass steel fracture caused by stress concentration, significantly prolong the service life of membrane element under high pressure high salt working condition.

Description

Technical Field

[0001] This utility model relates to the technical field of reverse osmosis membrane elements, and in particular to the technical field of a spiral wound membrane element end cap reinforcement structure. Background Technology

[0002] With the widespread application of industrial membrane elements in high-pressure and high-salt environments, traditional end cap structures are prone to problems such as fiberglass cracking and end cap detachment under high pressure of 70-120 bar, leading to a decline in system performance. Existing technologies (such as CN215138681U) mostly use complex integrated stiffener structures to reinforce the end caps, but these structures are complex, costly, difficult to demold, and cannot be adapted to elements of different sizes, lacking flexibility. Other solutions (such as CN204395784U and CN219631038U) focus on the connection method, without fundamentally solving the problem of strengthening the end cap itself and its compatibility with the diameter of the membrane element. Therefore, it is necessary to provide an optimized solution that is simple and reliable in structure, easy to manufacture and assemble, can significantly improve the overall strength of the end cap, and has excellent adaptability. Utility Model Content

[0003] The purpose of this invention is to solve the problems of complex end cap structure, high cost, non-adjustability and poor adaptability in the existing technology. It proposes a spiral wound membrane element end cap reinforcement structure. Through modular adjustable combination design, it realizes structural synergistic enhancement and convenient adaptation to different specifications of elements, significantly improving the mechanical strength, compressive strength and versatility of the end cap.

[0004] To achieve the above objectives, this utility model proposes a reinforced end cap structure for a spiral-wound membrane element, comprising two end cap bodies and multiple retaining grids. Each end cap body includes an outer ring, an inner ring, and multiple end cap support frames connecting the outer ring and the inner ring. Multiple anti-reverse snap-fit ​​structures for detachable connection are circumferentially distributed on the inner circumferential surface of the outer ring. The retaining grids have protruding snaps at both ends that engage with the anti-reverse snap-fit ​​structures. The retaining grids engage with the anti-reverse snap-fit ​​structures on the two end cap bodies via the protruding snaps at both ends, thereby forming a support frame connecting the two ends between the two end cap bodies.

[0005] In a preferred embodiment, the anti-reverse snap-fit ​​structure includes a snap-fit ​​groove disposed on the inner circumferential surface of the outer ring. The shape of the snap-fit ​​groove is complementary to the shape of the protruding snap-fit. For example, the snap-fit ​​groove may include a solid portion and a hollow portion, and the protruding snap-fit ​​has a protrusion adapted to the hollow portion; or, the snap-fit ​​groove includes a hollow portion, and the protruding snap-fit ​​has a protrusion adapted to the hollow portion. During assembly, the protrusion can pass through or engage with the hollow portion, and the solid portion provides limiting and locking.

[0006] The anti-reverse buckle engagement structure includes a buckle slot provided on the inner circumferential surface of the outer ring. The protruding buckle is adapted to the shape of the buckle slot to achieve one-way locking. Furthermore, the buckle slots on the inner circumferential surface of the outer ring are provided in multiple and evenly distributed along the circumference. By selecting buckle slots at different positions to engage with the card strip grid, membrane elements of different diameters can be adapted.

[0007] Preferably, the outer ring has multiple snap-fit ​​slots on its inner circumferential surface, evenly distributed circumferentially. By selecting snap-fit ​​slots at different positions to engage with the snap-fit ​​grid, the relative distance between the two end cap bodies can be adjusted, thereby precisely adapting to membrane elements of different diameters, ensuring uniform compatibility and balanced support, and effectively avoiding assembly failures due to element diameter deviations or mechanical damage caused by displacement during operation.

[0008] Furthermore, the location of the buckle slot is staggered from the connection point of the end cap support frame on the outer ring.

[0009] Preferably, the card strip grid has a mesh structure, with its grid skeleton providing the main rigid support, while the subsequently added glass fiber layer can effectively absorb and disperse local stress. The two work together to greatly avoid crack propagation caused by stress concentration, thereby significantly improving the overall high pressure resistance of the membrane element. Furthermore, the card strip grid has a long strip mesh structure, made of stainless steel or carbon fiber, with a mesh density of 3×3mm to 5×5mm.

[0010] Preferably, the number of end cap support skeletons is three, and they are evenly distributed along the circumference. The structure is simple, easy to inject and demold, and reduces costs. The position of the buckle slot is staggered from the connection point of the end cap support skeleton on the outer ring to optimize the mechanical distribution and prevent stress superposition.

[0011] Preferably, the end cap body is injection molded from high-strength engineering plastic into a single structure.

[0012] Preferably, a glass fiber reinforcement layer is also included, which is wound around the surface of the grid strip and cured with epoxy resin to form a composite reinforced structure. This reinforced protective layer can further enhance the overall strength of the structure, ensuring long-term use in harsh environments with high salt and high pressure, without fiberglass breakage or end cap separation under pressure.

[0013] The beneficial effects of this utility model are: 1. High structural strength and good pressure resistance: The frame structure with end cap support skeleton and card bar grid working together to bear the load, supplemented by optional glass fiber composite layer, has excellent mechanical properties, increases compressive strength by more than 50%, and has minimal deformation, effectively preventing the "telescope" phenomenon under high pressure.

[0014] 2. High adaptability and wide range of applications: The unique adjustable snap-fit ​​connection design can easily adapt to membrane elements of different diameters by selecting different slot positions, realizing one structure for multiple adaptations and improving the product's versatility and economy.

[0015] 3. Reliable connection and convenient assembly: The anti-reverse buckle and its ingenious structural design ensure a firm and stable connection, effectively preventing loosening during operation. At the same time, the assembly process is simple and quick, requiring no complicated tools, thus improving production efficiency.

[0016] 4. Stress dispersion and extended service life: The design of the grid and composite layer facilitates the uniform dispersion of stress and fluid flow, avoids local stress concentration, fundamentally protects the membrane element body, and significantly extends the overall service life.

[0017] 5. Low cost and easy to produce: The end cap body structure is simplified, easy to injection mold, and easy to demold; the card strip grid can be mass-produced in a standardized manner, with low overall manufacturing cost, which facilitates large-scale promotion and application.

[0018] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the end cap body of a spiral-wound membrane element end cap reinforcement structure according to the present invention. Figure 2 This is a side view of the card strip grid of the end cap reinforcement structure of a roll-type membrane element according to this utility model.

[0020] In the figure: 1-End cap body; 11-Outer ring; 12-Inner ring; 13-End cap support frame; 14-Snap-on slot; 141-Solid part; 142-Hollowed-out part; 2-Snap-on grid; 21-Protruding snap-on; 211-Protruding part; 3-Glass fiber reinforcement layer. Detailed Implementation

[0021] See Figure 1 , Figure 2 This utility model, 1. comprises: Two end cap bodies 1, each end cap body includes an outer ring 11, an inner ring 12 and multiple end cap support frames 13 connecting the outer ring and the inner ring, and multiple anti-reverse snap-fit ​​structures are distributed circumferentially on the inner circumferential surface of the outer ring 11. Multiple card strips 2, each having protruding buckles 21 at both ends that cooperate with the anti-reverse buckle structure; The card strip grille 2 engages with the anti-reverse buckle structure on the two end cap bodies 1 through the protruding buckles 21 at both ends, thereby forming a support frame connecting the two ends between the two end cap bodies.

[0022] The working process of this utility model: The working process of this utility model, a spiral wound membrane element end cap reinforcement structure, is described in conjunction with the accompanying drawings.

[0023] The end cap body 1 is integrally formed by injection molding and includes an outer ring 11, an inner ring 12, and three circumferentially distributed end cap support frames 13 connecting the two. Multiple (e.g., three sets of three) circumferentially distributed snap-fit ​​slots 14 are machined on the inner circumferential surface of the outer ring 11. The snap-fit ​​slots 14 are staggered from the connection points of the end cap support frames 13 on the outer ring 11. In a preferred embodiment, the snap-fit ​​slot 14 includes a solid portion 141 and a hollow portion 142. For example, its overall outline can be rectangular, with solid portions 141 on the top and bottom sides and hollow portions 142 (approximately triangular or fan-shaped) on the left and right sides.

[0024] The grid 2 is made of stainless steel or carbon fiber in the form of a long mesh structure, with protruding buckles 21 at both ends. The shape of the protruding buckles 21 is complementary to the buckle slot 14, for example, it is provided with a protrusion 211 that matches the shape of the hollow part 142.

[0025] During assembly, based on the specific diameter of the membrane element to be assembled, select the corresponding snap-fit ​​slots 14 on the end cap bodies 1. Align the protruding portions 211 of the protruding snap-fits 21 at both ends of the three (or more) snap-fit ​​bars 2 with the hollow portions 142 of the slots, apply appropriate pressure to make them snap into place, and achieve limiting and one-way locking through the solid portions 141, thereby quickly forming a stable, adjustable in size, and firmly connected support frame. This frame can effectively disperse stress, adhere tightly to the membrane body, and prevent structural displacement. To further enhance strength, glass fibers can be wound around the surface of the assembled snap-fit ​​bars 2 and coated with epoxy resin for curing to form a composite reinforcement layer 3, thereby achieving all-round, multi-layered reinforcement and protection for the membrane element.

[0026] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A reinforced end cap structure for a spiral wound membrane element, characterized in that, include: Two end cap bodies (1), each end cap body includes an outer ring (11), an inner ring (12) and multiple end cap support frames (13) connecting the outer ring and the inner ring. Multiple anti-reverse snap-fit ​​structures are distributed circumferentially on the inner circumferential surface of the outer ring (11). Multiple card strips (2), each end of which is provided with protruding buckles (21) that cooperate with the anti-reverse buckle structure; The card strip grille (2) is engaged with the anti-reverse buckle structure on the two end cap bodies (1) by the protruding buckles (21) at both ends, thereby forming a support frame connecting the two ends between the two end cap bodies.

2. The end cap reinforcement structure for the spiral wound membrane element according to claim 1, characterized in that, The anti-reverse buckle structure includes a buckle groove (14) on the inner circumferential surface of the outer ring (11), and the protruding buckle (21) is adapted to the shape of the buckle groove (14) to achieve one-way locking.

3. The end cap reinforcement structure for the spiral wound membrane element according to claim 2, characterized in that, The outer ring (11) has multiple snap-fit ​​slots (14) on its inner circumferential surface, which are evenly distributed along the circumference. By selecting snap-fit ​​slots (14) at different positions to cooperate with the snap-fit ​​grid (2), it can be adapted to membrane elements of different diameters.

4. The end cap reinforcement structure for the spiral wound membrane element according to claim 3, characterized in that, The buckle slot (14) is positioned offset from the connection point of the end cap support frame (13) on the outer ring (11).

5. The end cap reinforcement structure for the spiral wound membrane element according to claim 1, characterized in that, The card strip grille (2) is a long strip-shaped mesh structure, made of stainless steel or carbon fiber, with a mesh density of 3×3mm to 5×5mm.

6. The end cap reinforcement structure for the spiral wound membrane element according to claim 1, characterized in that, The number of the end cap support frame (13) is three, and they are evenly distributed along the circumference; the position of the anti-reverse buckle engagement structure on the outer ring (11) is staggered from the connection point of the end cap support frame (13) on the outer ring (11).

7. The end cap reinforcement structure for the spiral wound membrane element according to claim 1, characterized in that, The end cap body (1) is injection molded from high-strength engineering plastic into an integral structure.

8. The end cap reinforcement structure for a spiral wound membrane element according to any one of claims 1 to 7, characterized in that, It also includes a glass fiber reinforcement layer (3), which is wrapped around the surface of the card strip grid (2) and cured with epoxy resin to form a composite reinforcement structure.

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