A hollow nanofiltration membrane cartridge assembly

Abstract

The utility model relates to hollow nanofiltration membrane filter core technical field, and disclose a kind of hollow nanofiltration membrane filter core assembly, including outer frame, the bottom of the outer frame is fixedly connected with bottom cover, the bottom of the bottom cover is fixedly connected with water outlet pipe, the inner joint of the outer frame is connected with the sleeve, the top of the sleeve is fixedly connected with hollow fiber filter core, the top of the hollow fiber filter core is fixedly connected with top plate, the top of the top plate is fixedly connected with inlet pipe, the surface of the outer frame is threadedly connected with cover cap. The utility model is through being provided with card station, limit stopper, sleeve, stop plate and spring, sleeve is sleeved on card station and limit stopper is penetrated through sleeve when installing, spring drives stop plate to continuously compress top plate after screwing cover cap, make hollow fiber filter core in axial and circumferential direction all be rigid-elastic composite limit, to still keep zero displacement under water flow impact, completely eliminate the sealing gap caused by filter core shaking, reach the effect that outlet water quality is not contaminated by bypass.

Description

Technical Field

[0001] This utility model relates to the field of hollow nanofiltration membrane filter element technology, specifically a hollow nanofiltration membrane filter element assembly. Background Technology

[0002] Hollow fiber nanofiltration membrane cartridges are water purification elements based on membrane separation technology. The core of the cartridge is a hollow fiber nanofiltration membrane. Through the synergistic effect of physical sieving and charge effect, the cartridge can accurately retain pollutants such as large molecular weight organic matter, divalent ions and microorganisms, while allowing small molecules to pass through, thus achieving selective filtration.

[0003] The existing components rely solely on the end cap threads to press the filament casting body together, lacking radial limiting and continuous compensation force. Under long-term pulsed water flow impact, micro-gaps appear between the casting body and the shell, the sealing gasket loosens, and raw water directly leaks into the product water side. At the same time, once the single sealing structure fails, external leakage occurs, causing the entire machine to leak and become unusable. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a hollow nanofiltration membrane filter element assembly, including an outer frame, a bottom cover fixedly connected to the bottom of the outer frame, a water outlet pipe fixedly connected to the bottom of the bottom cover, a retaining sleeve snapped into the inside of the outer frame, a hollow fiber filter element fixedly connected to the top of the retaining sleeve, a top plate fixedly connected to the top of the hollow fiber filter element, a water inlet pipe fixedly connected to the top of the top plate, a sealing cap threadedly connected to the surface of the outer frame, a spring fixedly connected to the bottom of the inner wall of the sealing cap, a stop plate fixedly connected to the bottom of the spring, a limit sleeve fixedly connected to the bottom of the inner wall of the sealing cap, and a sealing gasket snapped into the top of the top plate.

[0005] Through the above technical solution, the mechanical locking of the filter element and the sealing of the inlet side are completed simultaneously by the tightening action of the cap: the spring-stop plate continuously converts the thread pre-tightening force into the axial pressing force of the filter element, and the limiting sleeve and the sealing gasket form an axial sealing pair under the same action, so as to achieve sealing upon installation with a single tightening operation, achieving the comprehensive effect of convenient assembly, no leakage during operation, no shaking of the filter element, and no bypass pollution of the effluent.

[0006] As a further improvement to the above solution, two water outlet pipes are provided, and the two water outlet pipes are evenly distributed on the surface with respect to the center of the bottom of the cover.

[0007] With the above technical solution, the water outlet pipe is symmetrically arranged around the center of the bottom cover, so that the filtered water is discharged in both directions in equal amounts, which counteracts the internal radial force, reduces the risk of lateral bending of the filter element, and extends the life of the membrane fibers.

[0008] As a further improvement to the above solution, the water inlet pipe penetrates the top of the cover, and the bottom of the abutment contacts the top of the top plate.

[0009] With the above technical solution, the water inlet pipe passes through the cover and the abutment plate acts directly on the top plate, so that the thread pre-tightening force of the cover is transferred to the entire filter element without loss. Tightening the thread locks the filter element.

[0010] As a further improvement to the above solution, the bottom of the limiting sleeve contacts the top of the sealing gasket.

[0011] Through the above technical solution, the lower end face of the limiting sleeve and the upper end face of the sealing gasket form a rigid-flexible contact after the cap is tightened, preventing the sealing gasket from being squeezed out by high-pressure water and maintaining the long-term effectiveness of the seal on the water inlet side.

[0012] As a further improvement to the above solution, a locking platform is fixedly connected to the bottom of the inner wall of the bottom cover, and a limiting locking post is fixedly connected to the top of the locking platform.

[0013] Through the above technical solution, the carding platform and the limiting carding post form an integrated positioning reference on the bottom cover. The filter element can be automatically aligned upon insertion, eliminating assembly eccentricity and avoiding excessive bending of the membrane fibers in some areas.

[0014] As a further improvement to the above solution, the card sleeve is fitted onto the surface of the card platform, and the limiting card post penetrates through the top of the card sleeve.

[0015] Through the above technical solution, the ferrule is inserted into the ferrule and the ferrule platform at the same time, and is penetrated by the limiting ferrule, realizing dual positioning of ferrule and insertion. The filter element remains fixed at an angle during transportation and pulse water flow conditions to prevent wear of the sealing pair.

[0016] As a further improvement to the above solution, an inner plate 1 is fixedly connected to the inner wall of the outer frame, an inner plate 2 is fixedly connected to the inner wall of the cover, and a sealing gasket 2 is provided on the top of the inner plate 1.

[0017] Through the above technical solution, the inner panel of the outer frame and the inner panel of the cover form a stepped sealing platform, providing a plane-to-plane compression environment for the sealing gasket, thus avoiding the defect of easy aging and failure of line seals.

[0018] As a further improvement to the above solution, the top of the second sealing gasket is in contact with the bottom of the second inner plate, and the first inner plate and the second inner plate are concentric.

[0019] Through the above technical solution, inner plate one and inner plate two are arranged concentrically, so that the sealing gasket two is subjected to uniform pressure, and the tightening force of the cover is completely converted into sealing pressure, without eccentric deformation, thus ensuring the sealing effect at the connection between the outer frame and the cover.

[0020] Compared with the prior art, the beneficial effects of this utility model are: This utility model incorporates a mounting platform, a limiting pin, a sleeve, a stop plate, and a spring. During installation, the sleeve is fitted onto the mounting platform, and the limiting pin passes through the sleeve. After tightening the cap, the spring drives the stop plate to continuously press the top plate, ensuring that the hollow fiber filter element is rigidly and elastically limited in both the axial and circumferential directions. This prevents the filter element from shifting under water flow impact, completely eliminating sealing gaps caused by filter element movement and ensuring that the effluent water quality is not polluted by the bypass.

[0021] This utility model, by setting a limiting sleeve, a sealing gasket, an inner plate, an inner plate, and a sealing gasket, achieves the first axial seal at the interface between the water inlet pipe and the cover by simultaneously pressing the sealing gasket with the limiting sleeve during the tightening process of the cover. At the same time, the inner plate squeezes the sealing gasket to form the second end face seal at the interface between the cover and the outer frame. The two seals are completed synchronously in the same tightening action and do not interfere with each other, achieving the effect of no leakage in the whole machine. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the overall disassembled structure of this utility model.

[0023] In the diagram: 1. Outer frame; 2. Bottom cover; 3. Outlet pipe; 4. Clamping platform; 5. Clamping sleeve; 6. Hollow fiber filter element; 7. Top plate; 8. Inlet pipe; 9. Cover; 10. Spring; 11. Support plate; 12. Limiting sleeve; 13. Sealing gasket one; 14. Inner plate one; 15. Inner plate two; 16. Sealing gasket two; 17. Limiting pin. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] Example: Please combine Figure 1-4A hollow nanofiltration membrane filter element assembly according to this embodiment includes an outer frame 1, a bottom cover 2 fixedly connected to the bottom of the outer frame 1, a water outlet pipe 3 fixedly connected to the bottom of the bottom cover 2, a sleeve 5 snapped into the inside of the outer frame 1, a hollow fiber filter element 6 fixedly connected to the top of the sleeve 5, a top plate 7 fixedly connected to the top of the hollow fiber filter element 6, a water inlet pipe 8 fixedly connected to the top of the top plate 7, a sealing cap 9 threadedly connected to the surface of the outer frame 1, a spring 10 fixedly connected to the bottom of the inner wall of the sealing cap 9, a stop plate 11 fixedly connected to the bottom of the spring 10, a limit sleeve 12 fixedly connected to the bottom of the inner wall of the sealing cap 9, and a sealing gasket 13 snapped into the top of the top plate 7.

[0026] During installation, the cover 9 is threaded onto the surface of the outer frame 1. When the cover 9 rotates, it drives the abutment 11 to move downward until the bottom of the abutment 11 contacts the top of the top plate 7, thereby limiting and fixing the hollow fiber filter element 6. This prevents the hollow fiber filter element 6 from shaking under the impact of water flow during use, which could cause gaps and contaminate the water source.

[0027] There are two water outlet pipes 3, which are evenly distributed on the surface with the bottom center of the cover 2 symmetrically arranged.

[0028] The water inlet pipe 8 passes through the top of the cover 9, and the bottom of the abutment plate 11 contacts the top of the top plate 7.

[0029] The bottom of the limiting sleeve 12 contacts the top of the sealing gasket 13.

[0030] The bottom of the inner wall of the bottom cover 2 is fixedly connected to a card platform 4, and the top of the card platform 4 is fixedly connected to a limit card post 17.

[0031] The card sleeve 5 is fitted onto the surface of the card holder 4, and the limiting card post 17 penetrates through the top of the card sleeve 5.

[0032] The inner wall of the outer frame 1 is fixedly connected to an inner plate 14, the inner wall of the cover 9 is fixedly connected to an inner plate 2 15, and a sealing gasket 2 16 is provided on the top of the inner plate 14.

[0033] During installation, when the cover 9 is threaded onto the surface of the outer frame 1, the limiting sleeve 12 contacts the surface of the sealing gasket 13 to seal the connection between the water inlet pipe 8 and the cover 9. At the same time, when the cover 9 is connected to the outer frame 1, the inner plate 15 presses against the sealing gasket 16 to seal the connection between the cover 9 and the outer frame 1, thus preventing leakage.

[0034] The top of sealing gasket 16 contacts the bottom of inner plate 15, and inner plate 14 and inner plate 2 are concentric.

[0035] The implementation principle of a hollow fiber nanofiltration membrane filter element assembly in this application embodiment is as follows: When installing the hollow fiber filter element 6, firstly, the sleeve 5 is fitted onto the surface of the mounting plate 4. The hollow fiber filter element 6 is rotated so that the limiting pin 17 passes through the top of the sleeve 5, thereby limiting and fixing the entire hollow fiber filter element 6. After fixing, the cover 9 is threaded onto the surface of the outer frame 1. When the cover 9 rotates, it drives the abutment plate 11 to move downward until the bottom of the abutment plate 11 contacts the top of the top plate 7, thereby limiting and fixing the entire hollow fiber filter element 6. This prevents the hollow fiber filter element 6 from shaking under the impact of water flow during use, which could cause gaps and pollute the water source.

[0036] When the cap 9 is threaded onto the surface of the outer frame 1, the limiting sleeve 12 contacts the surface of the sealing gasket 13, sealing the connection between the water inlet pipe 8 and the cap 9. At the same time, when the cap 9 is connected to the outer frame 1, the inner plate 15 presses against the sealing gasket 16, sealing the connection between the cap 9 and the outer frame 1 to prevent leakage.

[0037] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A hollow nanofiltration membrane filter element assembly, characterized in that: The device includes an outer frame (1), a bottom cover (2) fixedly connected to the bottom of the outer frame (1), a water outlet pipe (3) fixedly connected to the bottom of the bottom cover (2), a sleeve (5) snapped into the inside of the outer frame (1), a hollow fiber filter element (6) fixedly connected to the top of the sleeve (5), a top plate (7) fixedly connected to the top of the hollow fiber filter element (6), a water inlet pipe (8) fixedly connected to the top of the top plate (7), a cover (9) threadedly connected to the surface of the outer frame (1), a spring (10) fixedly connected to the bottom of the inner wall of the cover (9), a stop plate (11) fixedly connected to the bottom of the spring (10), a limit sleeve (12) fixedly connected to the bottom of the inner wall of the cover (9), and a sealing gasket (13) snapped into the top of the top plate (7).

2. The hollow nanofiltration membrane filter element assembly according to claim 1, characterized in that: There are two water outlet pipes (3), and the two water outlet pipes (3) are evenly distributed on the surface with the bottom center of the bottom cover (2) symmetrical.

3. The hollow nanofiltration membrane filter element assembly according to claim 1, characterized in that: The water inlet pipe (8) passes through the top of the cover (9), and the bottom of the abutment (11) contacts the top of the top plate (7).

4. The hollow nanofiltration membrane filter element assembly according to claim 1, characterized in that: The bottom of the limiting sleeve (12) is in contact with the top of the sealing gasket (13).

5. A hollow nanofiltration membrane filter element assembly according to claim 1, characterized in that: The bottom of the inner wall of the bottom cover (2) is fixedly connected to a card platform (4), and the top of the card platform (4) is fixedly connected to a limit card post (17).

6. A hollow nanofiltration membrane filter element assembly according to claim 5, characterized in that: The sleeve (5) is fitted onto the surface of the card holder (4), and the limiting pin (17) penetrates the top of the sleeve (5).

7. A hollow nanofiltration membrane filter element assembly according to claim 6, characterized in that: The inner wall of the outer frame (1) is fixedly connected to an inner plate one (14), the inner wall of the cover (9) is fixedly connected to an inner plate two (15), and a sealing gasket two (16) is provided on the top of the inner plate one (14).

8. A hollow nanofiltration membrane filter element assembly according to claim 7, characterized in that: The top of the second sealing gasket (16) is in contact with the bottom of the second inner plate (15), and the first inner plate (14) and the second inner plate (15) are concentric.

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