Leak-proof reverse osmosis membrane module

Abstract

The application discloses a leakage-proof reverse osmosis membrane assembly and relates to the field of water purification. The leakage-proof reverse osmosis membrane assembly comprises a metal pipe, a first metal frame movably arranged in the metal pipe, a second metal frame hingedly connected to the top of the first metal frame, a clamping assembly movably arranged outside the first metal frame and the second metal frame, a front blocking cover fixed to one end of the first metal frame, a rear blocking cover fixed to the other end of the first metal frame, a pressing pipe threadedly connected to the inside of the front blocking cover, and a water inlet pipe movably arranged in the inside of the pressing pipe. The first metal frame and the second metal frame can be pulled out of the metal pipe. In the prior art, the reverse osmosis membrane is slowly pushed into the metal pipe after being coated with lubricating oil to avoid the friction between the rubber ring and the inner wall of the metal pipe. The vertical placement avoids the damage of the rubber ring caused by the pushing. At this time, the plurality of reverse osmosis membranes can rotate without worrying about the friction between the rubber ring and the inner wall of the metal pipe.

Description

Technical Field

[0001] This invention relates to the field of water purification, specifically to a leak-proof reverse osmosis membrane module. Background Technology

[0002] Reverse osmosis technology is mainly used in water purification projects. Reverse osmosis membranes, made using reverse osmosis technology, use pressure difference as the driving force to filter and purify water. Reverse osmosis devices pressurize the source water through a high-pressure pump. Except for water molecules, which can pass through the RO membrane, almost all other minerals in the water are rejected by the membrane. Common household water purification equipment usually has one set of reverse osmosis membranes installed, while large-scale water purification projects need to use multiple sets of reverse osmosis membranes in combination to improve the efficiency of water purification.

[0003] Large-scale reverse osmosis (RO) systems utilize multiple metal tubes. These tubes typically house multiple RO membranes. The RO membranes consist of a filter cartridge installed inside the membrane housing, followed by an inner core inside the filter cartridge. Numerous inlet holes are formed on the surface of the inner core. Source water enters through the end face of the RO membrane and flows from the side of the filter cartridge into its interior. After filtration, the purified water flows towards the inner core. Therefore, purified water flows towards the inner core after filtration, while impurities enter through one end face and exit from the other. In current technology, when multiple RO membranes are connected end-to-end, ensuring a good seal at the connection points requires installing sealing gaskets on the end faces of the membrane housings and flared rubber rings on the sides of the housings. The connection between the inner cores of two RO membranes is achieved by inserting a water pipe with a sealing ring on its side. This ensures a tight seal between the multiple RO membranes. The reverse osmosis membrane is sealed by external pressure. A plug is installed on the end face of the metal tube, which can be driven into it. Using a hammer to evenly tap the surface of the plug can compress the multiple reverse osmosis membranes inside, thus connecting them into a whole. The sealing gasket installed on the end face of the membrane housing does not increase the diameter of the membrane housing, but the flared rubber ring installed on the side of the membrane housing will increase the diameter of the membrane housing. Therefore, when designing the metal tube, the inner diameter of the metal tube is slightly larger than the outer diameter of the reverse osmosis membrane housing, so that the reverse osmosis membrane and the side rubber ring can fit perfectly into the metal tube. The metal tube can also act as a limiter. When multiple reverse osmosis membranes are connected and sealed, the external pressure is relatively large. The metal tube not only plays a protective role, but also helps the reverse osmosis membranes to align. When installing the reverse osmosis membrane, a lubricant needs to be applied to the sealing part, and it should be slowly pushed into the metal tube to prevent the inner wall of the metal tube from damaging the rubber ring on the side of the membrane housing, thus affecting the sealing effect.

[0004] As described above, leaks in existing reverse osmosis (RO) devices mainly occur at the end-to-end contact points of the two RO membranes and at the central tube used for inserting the inner core. External pressure sealing and insertion sealing have limited effectiveness because, during installation, it's impossible to manually push the RO membrane completely horizontally into the metal tube. This can cause friction between the inner wall of the metal tube and the rubber ring on the membrane shell, damaging it. The metal tube is designed to limit the RO membrane's position, ensuring that multiple RO membranes are squeezed together at the same horizontal level for better sealing. However, manual pressure is insufficient for effective sealing. It is impossible to apply pressure to the reverse osmosis membrane with a completely uniform tapping cap. Furthermore, the sealing gaskets on the end face of the reverse osmosis membrane and the rubber rings on the sides are made of soft, malleable materials. When the cap compresses the reverse osmosis membrane, multiple reverse osmosis membranes will contract and shift in both the horizontal and vertical directions due to the malleability of the sealing gaskets and rubber rings. This prevents the multiple reverse osmosis membranes from being completely on the same horizontal line, which also reduces the sealing effect. In existing technologies, the metal tube improves the confinement effect by minimizing the gap between the inner wall, the membrane shell, and the rubber rings. However, this also limits the size of the rubber rings on the sides of the membrane shell, and small sealing rings also reduce the sealing effect. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a leak-proof reverse osmosis membrane module to solve the technical problems mentioned in the background above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a leak-proof reverse osmosis membrane assembly, comprising a metal tube, wherein a first metal frame is movably installed inside the metal tube, and a second metal frame is hinged to the top of the first metal frame; multiple sets of support frames are fixed to the inner sides of the first and second metal frames, and rubber pads are installed on the inner sides of each support frame; and a clamping assembly is movably installed on the outer sides of the first and second metal frames; a front cap is fixed to one end of the first metal frame, and a rear cap is fixed to the other end of the first metal frame; a pressure tube is threadedly connected to the inner side of the front cap, and an inlet pipe is movably installed inside the pressure tube; the clamping assembly comprises two sets of T-shaped frames, and an arc-shaped clamp is fixed to the top of the T-shaped frames; a long bolt is threaded through the two sets of T-shaped frames; a spring is sleeved on the outside of the long bolt, and a movable nut is threadedly connected to one end of the long bolt.

[0007] By adopting the above technical solution, the reverse osmosis membrane can be pulled out of the metal tube by setting the first and second metal frames with hinges. When the first and second metal frames are pulled out from the inside of the metal tube, the reverse osmosis membrane can be inserted into the metal frame by vertical insertion. In the original technology, when the reverse osmosis membrane is pushed into the metal tube, lubricating oil is applied and it is slowly pushed in to avoid friction between the inner wall and the rubber ring. Vertical insertion avoids the problem of damage to the rubber ring caused by pushing in. Moreover, vertical insertion means that the sealing element of the reverse osmosis membrane does not need to be lubricated. At this time, multiple reverse osmosis membranes can rotate without worrying about friction between the inner wall and the rubber ring of the metal tube. The plug connection of the inner tube core is replaced with a threaded connection. At the same time, the first and second sealing rings are used to improve the sealing performance. The Teflon tape is wrapped around the threaded connection to further improve the sealing performance. The design of the metal frame makes the installation and removal of the reverse osmosis membrane more convenient.

[0008] The present invention is further configured such that a plurality of limiting rods are fixed on one side of the front plug, and the end of the clamping tube passes through the plurality of limiting rods, and a plurality of first sealing rings are installed on the side of the front plug, and a first sealing gasket is installed on the side of the water inlet pipe.

[0009] By adopting the above technical solution, the stability of the compression tube can be increased by setting multiple sets of limit rods, and the sealing performance of the water inlet pipe and the sealing sleeve can be increased by setting the first sealing ring.

[0010] The present invention is further configured such that a second sealing gasket is installed on the side of the rear plug, and multiple sets of second sealing rings are installed on the side of the rear plug, an internally threaded pipe is provided on the side of the rear plug, and an impurity water pipe is provided on the side of the rear plug.

[0011] By adopting the above technical solution, the sealing performance between the rear plug and the sealing sleeve can be increased by setting a second sealing gasket, and wastewater can be discharged by setting an impurity water pipe.

[0012] The present invention is further configured such that a reverse osmosis membrane is installed in multiple sets of the support frames, and the reverse osmosis membrane is composed of a membrane shell, a filter element and an inner tube core. An internal thread groove is opened on the inner side of one end of the inner tube core, and a first inner tube is fixed to the inner wall of the inner tube core. A first sealing ring is sleeved on the outside of the first inner tube. An external thread tube is fixed to one end of the inner tube core, and a second inner tube is fixed to the inner wall of the external thread tube. A second sealing ring is sleeved on the outside of the second inner tube.

[0013] By adopting the above technical solution, and by setting up a threaded reverse osmosis membrane and installing a first sealing ring and a second sealing ring, the sealing performance of the inner core between the two reverse osmosis membranes can be improved.

[0014] The present invention is further configured such that multiple sets of water inlet holes are provided on the side of the inner tube core.

[0015] By adopting the above technical solution, multiple sets of water inlet holes are opened on the side of the inner core, allowing the pure water filtered by the filter element to flow into the inner core.

[0016] The present invention is further configured such that sealing sleeves are installed at both ends of the membrane shell.

[0017] By adopting the above technical solution, the sealing performance between the two reverse osmosis membranes can be improved by setting a sealing sleeve.

[0018] The present invention is further configured such that a pure water pipe is internally threaded to the internally threaded pipe, and the side of the pure water pipe is provided with a first external thread groove and a second external thread groove, and a fixing nut is fixed to the outside of the pure water pipe, and a third sealing gasket is installed on one side of the fixing nut.

[0019] By adopting the above technical solution and installing a pure water pipe, the pure water in the inner core can be smoothly discharged.

[0020] The present invention is further configured such that the external thread of the externally threaded tube is connected to a sealing cap, and a fourth sealing gasket is installed inside the sealing cap.

[0021] By adopting the above technical solution, the water inlet end of the reverse osmosis membrane core can be blocked by setting a sealing cap, preventing source water from entering the core.

[0022] The present invention is further configured such that the first metal frame and the second metal frame are fixed together by screws.

[0023] By adopting the above technical solution and fixing the first and second metal frames with screws, stability can be improved.

[0024] In summary, the present invention has the following main beneficial effects:

[0025] This invention, by setting a hinged first metal frame and a second metal frame, allows the reverse osmosis membrane to be pulled out of the metal tube. When the first and second metal frames are pulled out from inside the metal tube, the reverse osmosis membrane can be vertically inserted into the metal frames. In the prior art, when the reverse osmosis membrane is pushed into the metal tube, lubricating oil is applied and it is slowly pushed in to avoid friction between the inner wall and the rubber ring. Vertical insertion avoids the problem of damage to the rubber ring caused by pushing in. Moreover, vertical insertion means that the sealing element of the reverse osmosis membrane does not need to be lubricated. At this time, multiple reverse osmosis membranes can rotate without worrying about friction between the inner wall and the rubber ring of the metal tube. The plug connection of the inner tube core is replaced with a threaded connection. At the same time, the first and second sealing rings are used to improve the sealing performance. The Teflon tape is wrapped around the threaded connection to further improve the sealing performance. The design of the metal frame makes the installation and removal of the reverse osmosis membrane more convenient.

[0026] This invention improves the sealing performance of the reverse osmosis membrane by using a sealing sleeve. Since the reverse osmosis membrane is installed within the first and second metal frames, the metal tube no longer needs to restrict its movement. This increases the gap between the metal tube and the reverse osmosis membrane, and the size of the sealing sleeve is also increased. Furthermore, when the two reverse osmosis membranes are threaded together, the sealing sleeves on their ends are squeezed and tightened against each other. The clamping assembly further enhances the sealing performance between the two sealing sleeves, reducing the risk of leakage. The pressure tube, through threaded rotation, applies a uniform external force to the reverse osmosis membrane, improving the stability of the connection and thus enhancing the sealing performance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram showing the connection between the first metal frame and the second metal frame of the present invention;

[0029] Figure 3 This is a schematic diagram showing the connection between the first metal frame, the second metal frame, and the clamping assembly of the present invention;

[0030] Figure 4 This is a schematic diagram showing the connection between the first metal frame, the front end cap, and the rear end cap of the present invention;

[0031] Figure 5 This is a schematic diagram of the reverse osmosis membrane installation according to the present invention;

[0032] Figure 6 This is a schematic diagram showing the connection between the front plug, the limiting rod, and the first sealing ring of the present invention;

[0033] Figure 7 This is a schematic diagram of the compression tube structure of the present invention;

[0034] Figure 8 This is a schematic diagram showing the connection between the water inlet pipe and the first sealing gasket of the present invention;

[0035] Figure 9 This is a schematic diagram showing the connection between the front plug, the clamping tube, and the water inlet tube of the present invention;

[0036] Figure 10 This is a schematic diagram of the clamping component structure of the present invention;

[0037] Figure 11 This is a cross-sectional view of the clamping component of the present invention;

[0038] Figure 12 This is a schematic diagram of the rear plug structure of the present invention;

[0039] Figure 13 This is a cross-sectional view of the rear plug of the present invention;

[0040] Figure 14This is a schematic diagram of the pure water pipe structure of the present invention;

[0041] Figure 15 This is a schematic diagram showing the connection between the reverse osmosis membrane and the sealing sleeve of the present invention;

[0042] Figure 16 This is a cross-sectional view of the reverse osmosis membrane of the present invention;

[0043] Figure 17 This is a schematic diagram showing the connection between the membrane shell and the inner core of the present invention;

[0044] Figure 18 This is a cross-sectional view of the membrane shell and inner core of the present invention;

[0045] Figure 19 This is a schematic diagram of the sealing cap structure of the present invention.

[0046] In the diagram: 1. First metal frame; 2. Second metal frame; 3. Screw; 4. Support frame; 5. Rubber pad; 6. Clamping assembly; 7. Front cap; 8. Limiting rod; 9. First sealing ring; 10. Pressing tube; 11. Water inlet pipe; 12. First sealing gasket; 13. Rear cap; 14. Second sealing gasket; 15. Second sealing ring; 16. Internally threaded pipe; 17. Impurity water pipe; 18. Membrane housing; 19. Filter element; 20. Inner core tube; 21. Sealing sleeve; 22. Pure water pipe; 23. Sealing cap; 24. Fourth sealing ring. 25. Gasket; 26. Metal tube; 601. Reverse osmosis membrane; 602. T-shaped bracket; 603. Arc-shaped clamp; 604. Long bolt; 605. Spring; 606. Movable nut; 2001. Water inlet; 2002. Internal threaded groove; 2003. First inner tube; 2004. First sealing ring; 2005. External threaded tube; 2006. Second inner tube; 2007. Second sealing ring; 2201. First external threaded groove; 2202. Second external threaded groove; 2203. Fixing nut; 2204. Third sealing gasket. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] The embodiments of the present invention will now be described.

[0049] Leak-proof reverse osmosis membrane modules, such as Figure 1-19As shown, the device includes a metal tube 25, inside which a first metal frame 1 is movably mounted, and a second metal frame 2 is hinged to the top of the first metal frame 1. Multiple sets of support frames 4 are fixed to the inner sides of the first metal frame 1 and the second metal frame 2, and rubber pads 5 are installed on the inner sides of each support frame 4. By setting the support frames 4 and rubber pads 5, the first metal frame 1 and the second metal frame 2 can clamp the reverse osmosis membrane 26 when closed, making it more stable and secure. A clamping assembly 6 is movably mounted on the outside of the first metal frame 1 and the second metal frame 2. By setting the clamping assembly 6, the fitted sealing sleeve 21 can be further clamped and fixed to improve the sealing performance. A front cap 7 is fixed to one end of the first metal frame 1, and a rear cap 1 is fixed to the other end of the first metal frame 1. 3. The front plug 7 is internally threaded with a pressure tube 10. By setting the pressure tube 10, the pressure tube 10 can evenly apply external force to the reverse osmosis membrane 26. The inlet pipe 11 is movably installed inside the pressure tube 10. The clamping assembly 6 includes two sets of T-shaped frames 601. The top of the T-shaped frame 601 is fixed with an arc-shaped clamp 602. A long bolt 603 is inserted between the two sets of T-shaped frames 601. A spring 604 is sleeved on the outside of the long bolt 603. A movable nut 605 is threaded to one end of the long bolt 603. By setting the spring 604 in the clamping assembly 6, it is in the open state when not closed. The arc-shaped clamp 602 is distributed on both sides of the sealing sleeve 21, making clamping more convenient.

[0050] Please see Figure 6 , Figure 7 , Figure 8 and Figure 9 Multiple sets of limiting rods 8 are fixed on one side of the front plug 7, and the end of the clamping tube 10 passes through the multiple sets of limiting rods 8. Multiple sets of first sealing rings 9 are installed on the side of the front plug 7, and a first sealing gasket 12 is installed on the side of the water inlet pipe 11. By setting multiple sets of limiting rods 8, the stability of the clamping tube 10 can be increased, and by setting the first sealing rings 9, the sealing performance of the water inlet pipe 11 and the sealing sleeve 21 can be increased.

[0051] Please see Figure 12 and Figure 13 The rear plug 13 is provided with a second sealing gasket 14 on its side, and multiple sets of second sealing rings 15 are also provided on the side of the rear plug 13. The rear plug 13 is provided with an internal threaded pipe 16 and a waste water pipe 17. By providing the second sealing gasket 14, the sealing between the rear plug 13 and the sealing sleeve 21 can be increased. The waste water pipe 17 can be used to discharge wastewater.

[0052] Please see Figure 5 , Figure 15 , Figure 16 , Figure 17 and Figure 18Multiple sets of support frames 4 are equipped with reverse osmosis membranes 26, and the reverse osmosis membranes 26 are composed of membrane shells 18, filter elements 19 and inner cores 20. One end of the inner core 20 has an internal threaded groove 2002, and a first inner tube 2003 is fixed to the inner wall of the inner core 20. A first sealing ring 2004 is sleeved on the outside of the first inner tube 2003. One end of the inner core 20 is fixed with an external threaded tube 2005, and a second inner tube 2006 is fixed to the inner wall of the external threaded tube 2005. A second sealing ring 2007 is sleeved on the outside of the second inner tube 2006. By setting the reverse osmosis membranes 26 with threaded connections and installing the first sealing ring 2004 and the second sealing ring 2007, the sealing performance of the inner cores 20 between the two reverse osmosis membranes 26 can be improved.

[0053] Please see Figure 18 The inner core 20 has multiple sets of water inlet holes 2001 on its side. By opening multiple sets of water inlet holes 2001 on the side of the inner core 20, the pure water filtered by the filter element 19 can flow into the inner core 20.

[0054] Please see Figure 15 Both ends of the membrane housing 18 are equipped with sealing sleeves 21. By setting the sealing sleeves 21, the sealing performance between the two reverse osmosis membranes 26 can be improved.

[0055] Please see Figure 14 The internally threaded tube 16 is internally threaded to a pure water tube 22, and the side of the pure water tube 22 is provided with a first external thread groove 2201 and a second external thread groove 2202. A fixing nut 2203 is fixed to the outside of the pure water tube 22, and a third sealing gasket 2204 is installed on one side of the fixing nut 2203. By setting the pure water tube 22, the pure water in the inner tube core 20 can be smoothly discharged.

[0056] Please see Figure 19 The external thread of the external threaded tube 2005 is connected to a sealing cap 23, and a fourth sealing gasket 24 is installed inside the sealing cap 23. By setting the sealing cap 23, the water inlet end of the inner tube core 20 of the reverse osmosis membrane 26 can be blocked to prevent the source water from entering the inner tube core 20.

[0057] Please see Figure 2 The first metal frame 1 and the second metal frame 2 are fixed by screws 3, which can improve stability.

[0058] The working principle of this invention is as follows: When it is necessary to install or replace the reverse osmosis membrane 26, first hold the clamping tube 10 to pull the device out from the inside of the metal tube 25, then loosen the screw 3 to open the second metal frame 2, and place a reverse osmosis membrane 26 on each of the three sets of support frames 4 in the first metal frame 1. Wrap Teflon tape around all the external threaded parts of the reverse osmosis membrane 26, and then hold one reverse osmosis membrane 26 with both hands and rotate and screw the external threaded tube 2005 of one reverse osmosis membrane 26 into the internal threaded groove 2002 of the other reverse osmosis membrane 26. During the screwing process, the first inner tube 2003 is inserted into the external threaded tube. Between the second inner tube 2005 and the second inner tube 2006, after the screwing is completed, the first sealing ring 2004 and the second sealing ring 2007 can seal the ends of the external threaded tube 2005 and the first inner tube 2003. At this time, the sealing sleeves 21 at the ends of the two reverse osmosis membranes 26 are in contact with each other. Through the above steps, multiple reverse osmosis membranes 26 are connected. The external threaded tube 2005 of the reverse osmosis membrane 26 installed at one end of the water inlet pipe 11 is sealed by the sealing cap 23. The fourth sealing gasket 24 can improve the sealing between the sealing cap 23 and the external threaded tube 2005, preventing the source water from entering the inner tube core 20.

[0059] When multiple reverse osmosis membranes 26 are connected, they should be placed as evenly as possible on the support frame 4 of the first metal frame 1. Then, close the second metal frame 2. Next, begin to reinforce the clamping components 6 on the first and second metal frames 1 and 2, so that the two sets of arc-shaped clamping pieces 602 of the clamping components 6 are located on both sides of the two fitted sealing sleeves 21. Tighten the movable nut 605 to bring the two sets of T-shaped frames 601 closer together and compress the spring 604 until the two arc-shaped clamping pieces 602 clamp the two sets of fitted sealing sleeves 21. Similarly, reinforce the other clamping components 6. Then, rotate the clamping tube 10 with a wrench to make the clamping tube 10 slide on the limit rod 8 and push the inlet pipe 11 closer to the end face sealing sleeve 21 of the reverse osmosis membrane 26. Continue to rotate the wrench to make the clamping tube 10 push the inlet pipe 11, thereby pushing the reverse osmosis membrane 26 towards the rear plug 13. The clamping components 6 follow the reverse osmosis membrane. Move the wrench together until the sealing sleeve 21 at the other end of the reverse osmosis membrane 26 is in contact with the second sealing gasket 14 of the back plug 13. Stop turning the wrench when the first sealing gasket 12 can increase the sealing between the water inlet pipe 11 and the sealing sleeve 21, and the second sealing gasket 14 can increase the sealing between the sealing sleeve 21 and the back plug 13. Then screw the first external thread groove 2201 of the pure water pipe 22 into the internal thread tube 16 of the back plug 13. Continue to rotate the pure water pipe 22 so that the first external thread groove 2201 is fully engaged with the internal thread groove 2002 of the reverse osmosis membrane 26, and the second external thread groove 2202 is fully engaged with the internal thread tube 16. The third sealing gasket 2204 can improve the sealing between the fixing nut 2203 and the back plug 13, so that the filtered pure water can flow from the inner tube core 20 into the pure water pipe 22 and then flow out without mixing with the impurity water entering the back plug 13.

[0060] The reverse osmosis membrane 26 is now installed. The device can be pushed into the metal tube 25. The first sealing ring 9 and the second sealing ring 15 can increase the friction between the device and the inner wall of the metal tube 25. The inlet pipe 11 is connected to the source water, and the pure water pipe 22 is connected to the outlet water. When the source water enters the reverse osmosis membrane 26 through the inlet pipe 11, it enters from the end face of the filter element 19 and is blocked by the sealing cap 23 from entering the inner tube core 20. Under the filtration effect of the filter element 19, impurities and a small amount of water flow to the next reverse osmosis membrane 26, while pure water enters the inner tube core 20 through the inlet hole 2001 and then gradually flows to the pure water pipe 22. The impurity water flows all the way to the last reverse osmosis membrane 26 and flows out from the end face of the filter element 19 into the back plug 13, and then is discharged from the impurity water pipe 17.

[0061] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A leak-proof reverse osmosis membrane module, comprising a metal tube (25), characterized in that: The metal tube (25) is internally fitted with a first metal frame (1), and a second metal frame (2) is hinged to the top of the first metal frame (1). Multiple sets of support frames (4) are fixed to the inner sides of the first metal frame (1) and the second metal frame (2), and rubber pads (5) are installed on the inner sides of each support frame (4). Clamping assemblies (6) are externally fitted to the first metal frame (1) and the second metal frame (2). A front cap (7) is fixed to one end of the first metal frame (1), and a rear cap (13) is fixed to the other end of the first metal frame (1). A pressure tube (10) is threaded into the inside of the front cap (7), and a water inlet pipe (11) is movably installed inside the pressure tube (10). The clamping assembly (6) includes two sets of T-shaped frames (601), and an arc-shaped clamp (602) is fixed to the top of the T-shaped frames (601). A long bolt is inserted between the two sets of T-shaped frames (601). (603), a spring (604) is sleeved on the outside of the long bolt (603), and a movable nut (605) is threaded to one end of the long bolt (603). A reverse osmosis membrane (26) is installed in multiple sets of the support frame (4), and the reverse osmosis membrane (26) is composed of a membrane shell (18), a filter element (19) and an inner core (20). An internal thread groove (2002) is opened on the inner side of one end of the inner core (20), and the inner core (20) has an internal thread groove (2002) on the inner side. The inner wall is fixed with a first inner tube (2003), and the outer side of the first inner tube (2003) is fitted with a first sealing ring (2004). One end of the inner tube core (20) is fixed with an external threaded tube (2005), and the inner wall of the external threaded tube (2005) is fixed with a second inner tube (2006), and the outer side of the second inner tube (2006) is fitted with a second sealing ring (2007). Both ends of the membrane shell (18) are fitted with sealing rubber sleeves (21).

2. The leak-proof reverse osmosis membrane module according to claim 1, characterized in that: The front plug (7) has multiple sets of limiting rods (8) fixed on one side, and the end of the clamping tube (10) passes through the multiple sets of limiting rods (8). The front plug (7) has multiple sets of first sealing rings (9) installed on the side, and the water inlet pipe (11) has a first sealing gasket (12) installed on the side.

3. The leak-proof reverse osmosis membrane module according to claim 1, characterized in that: The rear plug (13) is provided with a second sealing gasket (14) on its side, and multiple sets of second sealing rings (15) are provided on the side of the rear plug (13). The rear plug (13) is provided with an internal threaded pipe (16) on its side, and an impurity water pipe (17) is provided on the side of the rear plug (13).

4. The leak-proof reverse osmosis membrane module according to claim 1, characterized in that: The inner tube core (20) has multiple sets of water inlet holes (2001) on its side.

5. The leak-proof reverse osmosis membrane module according to claim 3, characterized in that: The internally threaded pipe (16) is internally threaded to a pure water pipe (22), and the side of the pure water pipe (22) is provided with a first external thread groove (2201) and a second external thread groove (2202), and a fixing nut (2203) is fixed to the outside of the pure water pipe (22), and a third sealing gasket (2204) is installed on one side of the fixing nut (2203).

6. The leak-proof reverse osmosis membrane module according to claim 1, characterized in that: The external threaded tube (2005) is connected to a sealing cap (23) and a fourth sealing gasket (24) is installed inside the sealing cap (23).

7. The leak-proof reverse osmosis membrane module according to claim 1, characterized in that: The first metal frame (1) and the second metal frame (2) are fixed by screws (3).

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