Membrane element and composite filter element
By designing a membrane element with a central tube and end caps forming a wound bearing surface and water passage, the problems of complex structure and high cost of composite filter elements are solved, achieving a simplified structure and multi-stage filtration effect, and reducing production costs.
Patent Information
- Application Number
- CN202422892540.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-26
AI Technical Summary
When existing membrane elements are integrated with filter cartridges of other materials to form composite filter cartridges, the water circuit structure is complex, there are many parts, making it difficult to achieve integration and miniaturization, resulting in high production costs.
Design a membrane element that uses a central tube and end caps to form a wound bearing surface, simplifying the structure and forming a water passage at the connection point. The filter cartridge end cap inside the housing cavity is omitted, and a housing cavity is designed inside the central tube to integrate multi-stage filtration.
The internal structure of the composite filter element has been simplified, production costs have been reduced, filtration efficiency has been improved, and modular design has been achieved, further reducing production costs.
Smart Images
Figure CN223659883U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to water treatment technical field, concretely relates to a membrane element and composite filter core. BACKGROUND
[0002] Membrane element as the core part of water purification equipment, it usually includes filter membrane and center tube, filter membrane is wound on the center tube, and the center tube is provided with a hole. In the filtration process, raw water enters from the end of the filter membrane, under the action of water pressure, pure water comes out from the inside of the filter membrane and enters into the center tube through the hole, and the wastewater with higher concentration flows out from the outside of the filter membrane. However, when the existing membrane element is integrated with the filter core of other materials to form a composite filter core, the waterway structure is usually complex, and there are more parts, so that the composite filter core is difficult to realize integration and miniaturization, and the production cost is higher. SUMMARY
[0003] In order to solve the problems in the prior art, the utility model provides a membrane element and composite filter core, which fully utilizes the structure of the membrane element, is beneficial to simplify the structure of the composite filter core, and reduces the volume of the composite filter core.
[0004] In order to achieve the above-mentioned purpose, the membrane element of the utility model includes filter membrane and center tube assembly, the center tube assembly includes center tube and tube end cover, the tube end cover is sleeved on one end of the center tube, and the outer peripheral wall of the tube end cover and the outer peripheral wall of the center tube jointly form a winding bearing surface for winding the filter membrane.
[0005] In one embodiment, the filter membrane is wound on the outer wall of the center tube and at least part of the outer wall of the tube end cover.
[0006] In one embodiment, a containing cavity for containing the filter core is formed in the center tube assembly.
[0007] In one embodiment, the center tube and the tube end cover jointly form a water passing channel for communicating the membrane element and the containing cavity at the connection position.
[0008] In one embodiment, the axial extension of the filter membrane on the center tube assembly exceeds the water passing channel.
[0009] In one embodiment, the outer peripheral wall of the center tube is provided with a plurality of first water collecting grooves extending in the axial direction, and the first water collecting grooves extend into the tube end cover in the assembled state.
[0010] In one embodiment, the inner side wall of the tube end cover is provided with a plurality of second water collecting grooves extending in the axial direction, and the second water collecting grooves correspond to the first water collecting grooves one by one.
[0011] In one embodiment, a plurality of insertion grooves are formed in one end of the center tube which is sleeved with the tube end cover, and a plurality of insertion ribs are arranged on the inner side wall of the tube end cover and inserted into the insertion grooves.
[0012] In one embodiment, the membrane element includes a first membrane end cap and a second membrane end cap disposed at both ends of the filtration membrane, the first membrane end cap being located at the periphery of the tube end cap.
[0013] The utility model also provides a composite filter element, which comprises the membrane element as described above.
[0014] Advantages:
[0015] (1) The utility model can make full use of the self structure of the membrane element, design the inside of the central tube as a containing cavity for containing the filter element, so that the membrane element of the utility model can simplify the internal structure and water path of the composite filter element when integrated with the filter element of other materials.
[0016] (2) The membrane element of the utility model utilizes the cooperation of the central tube and the tube end cap to realize the winding bearing surface of the membrane, on the one hand, the area of the membrane can be increased to improve the filtering effect, on the other hand, the water passage at the connection between the central tube and the tube end cap can be used to realize the communication between the membrane element and the filter element in the containing cavity, so that multi-stage filtration can be realized.
[0017] (3) Compared with the composite filter element in the prior art, the structural design of the membrane element of the utility model can omit the end cap of the filter element in the containing cavity, so that the structure of the composite filter element is simpler and the production cost is lower. BRIEF DESCRIPTION OF DRAWINGS
[0018] The utility model will be further described and explained in combination with the drawings.
[0019] Figure 1 is a perspective view of the membrane element of the preferred embodiment of the utility model.
[0020] Figure 2 is Figure 1 is an exploded view of the membrane element.
[0021] Figure 3 is a perspective view of the central tube of the membrane element.
[0022] Figure 4 is an enlarged view of the small-diameter end of the central tube.
[0023] Figure 5 is an enlarged sectional view of the tube end cap of the membrane element.
[0024] Figure 6 is a sectional view of the membrane element.
[0025] REFERENCE SIGNS:
[0026] 10 Membrane element; 1 Central tube assembly; 2 Filter membrane; 3 First membrane end cap; 4 Second membrane end cap; 5 Water passage; 11 Central tube; 11a Small diameter end; 12 Tube end cap; 15 Receiving cavity; 110 First rib; 111 First water collection tank; 112 First inclined surface; 115 Insertion groove; 116 Separator; 120 Second rib; 121 Second water collection tank; 122 Second inclined surface; 123 Bottom plane; 125 Insertion rib; 126 Outlet; 151 First chamber; 152 Second chamber. Detailed Implementation
[0027] The technical solution of this utility model will be more clearly and completely explained below with reference to the accompanying drawings and through the description of the preferred embodiments of this utility model.
[0028] like Figure 1 and Figure 2 As shown, the membrane element 10 of this invention includes a central tube assembly 1 and a filter membrane 2, with the filter membrane 2 wound around the central tube assembly 1. The filter membrane 2 can be a reverse osmosis membrane or a nanofiltration membrane.
[0029] The central tube assembly 1 includes a central tube 11 and a tube end cap 12. The tube end cap 12 is sleeved on one end of the central tube 11. The outer peripheral wall of the central tube 11 and the outer peripheral wall of the tube end cap 12 together form a winding bearing surface for the filter membrane 2 to be wound. The filter membrane 2 is wound on the outer peripheral wall of the central tube 11 and at least part of the outer peripheral wall of the tube end cap 12.
[0030] The interior of the central tube assembly 1 has a receiving cavity 15 for accommodating the filter element. The central tube 11 and the tube end cap 12 together form a water passage 5 at their connection point, which connects the membrane element and the receiving cavity 15, so that pure water filtered by the filter membrane 2 can enter the receiving cavity 15 through the water passage 5.
[0031] Combination Figures 2 to 5 As shown, the central tube 11 has a smaller diameter at the end that is fitted with the tube end cap 12, forming a small diameter end 11a. When the tube end cap 12 is fitted onto this small diameter end 11a, the tube end cap 12 and the central tube 11 have the same outer diameter, thus forming a winding bearing surface with a uniform diameter, so that the filter membrane wound on it has a smooth surface.
[0032] The outer circumferential wall of the central tube 11 is provided with a plurality of first ribs 110 extending axially therefrom. The first ribs 110 extend to the small diameter end 11a, and the size of the first ribs 110 at the small diameter end 11a is also reduced, maintaining the same outer diameter as the small diameter end 11a, so as to facilitate the fitting of the tube end cap 12. A first water collection groove 111 is formed between adjacent first ribs 110. The water collection groove 111 extends to the small diameter end 11a. In the assembled state, the first water collection groove 111 extends into the tube end cap 12.
[0033] The inner wall of the pipe end cap 12 has several second ribs 120 extending axially therein, and a second water collection trough 121 is formed between adjacent second ribs 120. The second ribs 120 correspond one-to-one with the first ribs 110. Therefore, the second water collection trough 121 also corresponds one-to-one with the first water collection trough 111. In the assembled state, the two are connected. The portion of the first water collection trough 111 located at the small diameter end 11a and the second water collection trough 121 together form a water passage 5 connecting the membrane element 10 and the receiving cavity 15.
[0034] Furthermore, the first rib 110 has a first inclined surface 112 at one end of the small diameter end 11a, and the second rib 120 located on the pipe end cap 12 has a second inclined surface 122 at one end facing the central pipe 11, which is used to cooperate with the first inclined surface 112. The end of the second inclined surface 122 away from the central pipe 11 is connected to the bottom plane 123 of the second rib 120.
[0035] Furthermore, the small-diameter end 11a of the central tube 11 has multiple insertion slots 115, and the inner sidewall of the tube end cap 12 is provided with multiple insertion ribs 125 for connecting with the insertion slots 115.
[0036] like Figure 6 As shown, in the assembled state, the insertion rib 125 of the pipe end cap 12 is inserted into the insertion groove 115 of the central pipe 11, the second inclined surface 122 fits and matches the first inclined surface 112, and the bottom plane 123 of the second rib 120 is adjacent to the top surface of the first rib 110. These fits allow the pipe end cap 12 to be stably fitted onto the central pipe 11. In this assembled state, the first water collection tank 111 and the second water collection tank 121 are connected, so that the filtered pure water on the inner side of the filter membrane 2 is collected by the first water collection tank 111, and under the guidance of the first water collection tank 111, flows to the second water collection tank 121 and enters the pipe end cap 12, that is, into the receiving cavity 15 of the central pipe assembly 1.
[0037] The receiving cavity 15 of the central tube assembly 1 can accommodate the next stage filter cartridge of the membrane element, such as a post-filter cartridge. In this way, water filtered by the membrane element enters the receiving cavity 15 and can be filtered by the post-filter cartridge. The tube end cap 12 is provided with a water outlet 126 for discharging the pure water filtered by the filter cartridge in the receiving cavity 15.
[0038] Furthermore, the central tube 11 is provided with a separator 116 to divide the receiving cavity 15 into a first chamber 151 and a second chamber 152. These two chambers can respectively accommodate filter elements with different filter materials, such as a post-filter element and a pre-filter element, thereby realizing a composite filter element that integrates three filter elements.
[0039] The membrane element 10 also includes a first membrane end cap 3 and a second membrane end cap 4, which are respectively disposed at both ends of the filter membrane 2, wherein the first membrane end cap 3 is located on the periphery of the tube end cap 2.
[0040] The membrane element of this invention can form a single filter element or a composite filter element after being installed in the housing, which has a wider range of applications and a simpler structure.
[0041] The above-described specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications, substitutions, and improvements made by those skilled in the art to the technical solutions of the present invention based on the provided description and drawings, without departing from the design concept and spirit of the present invention, should all fall within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.
Claims
1. A membrane element, characterized in that, include: Filter membrane; A central tube assembly, comprising a central tube and a tube end cap, wherein the tube end cap is sleeved on one end of the central tube, and the outer peripheral wall of the tube end cap and the outer peripheral wall of the central tube together form a winding support surface for the filter membrane to be wound.
2. The membrane element according to claim 1, characterized in that, The filter membrane is wound around the outer wall of the central tube and at least part of the outer wall of the tube end cap.
3. The membrane element according to claim 2, characterized in that, The central tube assembly forms a receiving cavity for accommodating the filter element.
4. The membrane element according to claim 3, characterized in that, The central tube and the tube end cap together form a water passage connecting the membrane element and the receiving cavity at their connection.
5. The membrane element according to claim 4, characterized in that, The filter membrane extends axially beyond the water passage on the central tube assembly.
6. The membrane element according to claim 5, characterized in that, The outer circumferential wall of the central tube has several first water collection grooves extending along its axial direction. In the assembled state, the first water collection grooves extend into the tube end cap.
7. The membrane element according to claim 6, characterized in that, The inner wall of the pipe end cap has several second water collection grooves extending along its axial direction, and the second water collection grooves correspond one-to-one with the first water collection grooves.
8. The membrane element according to claim 7, characterized in that, The central tube has multiple insertion slots at one end that is fitted with the tube end cap, and the inner wall of the tube end cap is provided with multiple insertion ribs that are inserted into the insertion slots.
9. The membrane element according to claim 1, characterized in that, The membrane element includes a first membrane end cap and a second membrane end cap disposed at both ends of the filter membrane, wherein the first membrane end cap is located around the tube end cap.
10. A composite filter element, characterized in that, It includes the membrane element as described in any one of claims 1 to 9.