Reverse osmosis water purification system

Abstract

A return pipe is arranged at the bottom end of a pressure barrel of the reverse osmosis water purification system and is communicated with one end, close to a first filter seat, of a water inlet pipe, and a water outlet pipe is used for releasing pure water in the pressure barrel; the third filter seat further comprises a mounting shell internally provided with a cavity, a mounting cover detachably connected with the mounting shell and a filter element arranged between the mounting cover and the mounting shell, at least one pair of rotatable fixing blocks is arranged at the connecting end of the mounting shell and used for being embedded into the fixing grooves, and the fixing blocks are rotationally connected with the mounting shell through a rotating rod; a limiting plate is arranged on the lower side of the connecting end in the circumferential direction of the mounting shell, an annular protrusion is arranged on the side, back to the mounting cover, of the limiting plate in the vertical direction in an extending mode, and one end of a push block movably arranged on the outer wall of the mounting shell is arranged on the side, back to the containing cavity, of the annular protrusion in a sliding and sleeving mode. According to the invention, reliable and stable connection between the structures of the filtering units can be realized, and the fool-proof performance of the device and the operation efficiency of personnel are improved.

Description

Technical Field

[0001] The invention relates to the technical field of reverse osmosis water purification systems, and in particular to a reverse osmosis water purification system. Background Art

[0002] Reverse osmosis membrane technology applies a certain pressure to water, allowing water molecules and ionic mineral elements to pass through the reverse osmosis membrane, while most inorganic salts (including heavy metals), organic matter, bacteria, viruses, etc. dissolved in the water cannot pass through the reverse osmosis membrane, thereby strictly separating the pure water that has permeated and the concentrated water that cannot permeate.

[0003] According to the announcement number CN207091206U, a reverse osmosis water purification system with built-in pressure barrel filter element in series is provided, which includes a water inlet pipe, a first composite filter element, a carbon rod filter element, a booster pump, a reverse osmosis membrane filter element, a pressure barrel and a flushing valve. The pressure barrel is built-in, and the first composite filter element, the carbon rod filter element and the reverse osmosis membrane filter element are connected in series on the pipeline of the water inlet pipe through the first electromagnetic valve. The booster pump is arranged between the connecting pipelines of the first composite filter element and the carbon rod filter element. The pure water outlet of the reverse osmosis membrane filter element is connected to the pressure barrel through the first check valve, and the outlet of the pressure barrel is connected to the water faucet through the pump, the second check valve, the drain control switch and the flow switch in sequence. The concentrated water outlet of the reverse osmosis membrane filter element is connected to the waste water pipe through the flushing valve, and the bottom of the pressure barrel is provided with a secondary filtration outlet, which is connected to the front water inlet of the first composite filter element through the second electromagnetic valve and the third check valve. The present invention has high integration, and the built-in pressure barrel can be equipped with ultraviolet sterilization, which can effectively sterilize and can be taken out for cleaning.

[0004] In the prior art, after a period of use, the reverse osmosis water purification system has found that the impurities in the pressure barrel increase and the water inlet speed decreases significantly, which affects the water use of personnel. Therefore, it is necessary to design a reverse osmosis water purification system that can solve this problem. Summary of the invention

[0005] The applicant found that the problem of increased impurities in the pressure barrel and greatly reduced water inlet speed was due to the fact that the filter element of the filter unit adsorbed a large amount of impurities during long-term use, resulting in a decrease in the filtration effect and poor liquid permeability, thereby forming a large pressure between the water inlet and outlet of the filter unit. In addition, it is difficult to avoid vibration when the liquid flows in the system, causing loose connections and water leakage, and a decrease in the water inlet speed of the pressure barrel.

[0006] The technical problem to be solved by the present invention is to provide a reverse osmosis water purification system, which can realize the installation and disassembly of the filter element in the filter seat, facilitate the replacement of the filter element, and can also realize the reliable and stable connection between the structures of the filter unit itself, thereby ensuring the overall filtering effect.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a reverse osmosis water purification system, comprising: an inlet pipe, a first filter seat, a second filter seat and a third filter seat connected in sequence through a pipe, and a pressure barrel, the top of the first filter seat is connected to one end of the water inlet pipe, a booster pump is arranged on the pipe between the first filter seat and the second filter seat, the bottom end of the third filter seat is connected to the waste water pipe, and its circumferential outer wall is connected to the upper part of the pressure barrel through a connecting pipe, the bottom end of the pressure barrel is provided with a reflux pipe connected to one end of the water inlet pipe close to the first filter seat, and the water outlet pipe is used to release the pure water in the pressure barrel; The filter element is a filter element having a plurality of rotatable blocks, each of which is connected to the filter element by a plurality of threading means and a plurality of threading means, each of which is connected to the filter element by a plurality of threading means.

[0008] The further improved scheme in the above technical scheme is as follows: 1. In the above solution, the portion of the rotating rod located in the accommodating cavity is provided with a thread groove along its length direction for threaded connection with the push block, so that when the push block moves the maximum distance on the rotating rod, the rotating rod rotates exactly 180°.

[0009] 2. In the above solution, an internal thread is provided on the inner wall of the mounting cover, an external thread is provided on the circumferential outer wall of the connecting end, and the mounting cover is threadedly connected to the mounting shell.

[0010] 3. In the above solution, the fixing groove is located on the upper side of the internal thread, and the fixing block is correspondingly arranged on the side of the connection end close to the mounting cover.

[0011] 4. In the above solution, the fixing groove is arranged at the lower side of the internal thread, the fixing block is arranged between the limiting plate and the external thread, and a through hole for the fixing block to rotate is arranged on the circumferential outer wall of the connecting end.

[0012] 5. In the above solution, a spring is located in the accommodating cavity and is sleeved on the rotating rod.

[0013] 6. In the above scheme, the filter element of the third filter seat further includes a central tube and a reverse osmosis membrane rolled on the central tube, two end covers are mounted on the central tube and the reverse osmosis membrane is located between the two end covers, and both ends of the central tube can be exposed on opposite sides of the two end covers to be connected to the pipes on the mounting shell and the mounting cover respectively.

[0014] 7. In the above solution, the first filter seat, the second filter seat and the third filter seat have the same structure.

[0015] 8. In the above scheme, the filter elements of the first filter seat and the second filter seat are respectively a composite filter element and a carbon rod filter element.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The reverse osmosis water purification system of the present invention comprises a mounting shell with a cavity, a mounting cover detachably connected to the mounting shell, and a filter element arranged between the mounting cover and the mounting shell, so that the filter element can be installed and removed in the filter seat, which is convenient for replacing the filter element, thereby ensuring the stability of the filtering effect of the filter seat during long-term use; further, the mounting cover is provided with a fixing groove in the circumferential direction relative to the inner wall of the mounting shell, and at least one pair of rotatable fixing blocks is provided on the connecting end of the mounting shell for embedding in the fixing groove, and the fixing block is rotatably connected to the mounting shell through a rotating rod. Through the limiting effect of the fixing block and the fixing groove, the connection between the mounting cover and the mounting cover can be reliable and stable, avoiding the situation where the mounting cover and the mounting cover are separated due to vibration during long-term use, thereby improving the overall reliability.

[0017] 2. The reverse osmosis water purification system of the present invention further has a limit plate on the lower side of its connection end and along the circumference of the installation shell, and an annular protrusion is extended in the vertical direction on the side of the limit plate opposite to the installation cover, and a receiving cavity is formed between the annular protrusion and the outer wall of the installation shell, and one end of a push block movably arranged on the outer wall of the installation shell is slidably sleeved on the side of the annular protrusion opposite to the receiving cavity. Personnel can roughly estimate the rotation angle of the fixed block through the distance between the push block and the limit plate, which is convenient for personnel to judge whether the fixed block leaves the fixed groove. When the top of the push plate contacts the bottom of the limit plate, the push block moves the maximum distance on the rotating rod, ensuring that the fixed block is completely separated from the fixed groove, and then proceed to the next step of operation. This effectively avoids the situation in which personnel use excessive force when the fixing block and the fixing groove are not separated, causing damage to the fixing block, thereby improving the fool-proofness of the device; in addition, one end of the push block mounted on the outer wall of the mounting shell is slidably connected to the annular protrusion on the side opposite to the mounting shell, and the other end of the push block can move up and down in the accommodating cavity along the length direction of the mounting shell, so that the push block can move in the same direction on different straight lines, thereby improving the synchronization and stability of the movement of the push block, thereby ensuring the synchronization and smoothness of the rotation of the fixing block, greatly improving the accuracy of the fixing block being embedded in the fixing groove, effectively avoiding the situation in which the fixing block fails to be fully embedded in the fixing groove due to the tilt of the push block, reducing the number of connection failures, and greatly improving the operating efficiency of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a schematic diagram of the overall structure of the reverse osmosis water purification system of the present invention; Attached Figure 2 It is a partial structural schematic diagram of the reverse osmosis water purification system of the present invention; Attached Figure 3 It is a partial structural cross-sectional perspective view of a first embodiment of the present invention; Attached Figure 4 The present invention is attached Figure 3 A magnified schematic diagram of point A; Attached Figure 5 It is a partial structural cross-sectional perspective view of a second embodiment of the present invention; Attached Figure 6 It is a schematic diagram of the structure of the filter element of the reverse osmosis water purification system of the present invention.

[0019] In the above drawings: 1, water inlet pipe; 2, first filter seat; 3, second filter seat; 4, third filter seat; 5, pressure barrel; 6, waste water pipe; 7, connecting pipe; 8, water outlet pipe; 9, return pipe; 10, installation shell; 101, connection end; 102, external thread; 11, installation cover; 111, internal thread; 12, filter element; 121, center tube; 122, reverse osmosis membrane; 123, end cover; 13, fixing groove; 14, fixing block; 15, rotating rod; 151, threaded groove; 16, limiting plate; 17, annular protrusion; 18, accommodating chamber; 19, pushing block; 20, through hole; 21, spring; 21, booster pump; 23, first solenoid valve: 24, second solenoid valve; 25, first check valve; 26, second check valve; 27, flushing valve. Implementation

[0020] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0021] Embodiment 1: A reverse osmosis water purification system, comprising: an inlet pipe 1, a first filter seat 2, a second filter seat 3 and a third filter seat 4 connected in sequence through a pipeline, and a pressure barrel 5, wherein the top of the first filter seat 2 is connected to one end of the inlet pipe 1, a booster pump 22 is arranged on the pipeline between the first filter seat 2 and the second filter seat 3, the bottom end of the third filter seat 4 is connected to a waste water pipe 6, and its circumferential outer wall is connected to the upper part of the pressure barrel 5 through a connecting pipe 7, the bottom end of the pressure barrel 5 is provided with a reflux pipe 9 connected to one end of the inlet pipe 1 close to the first filter seat 2, and the outlet pipe 8 is used to release the pure water in the pressure barrel 5; The third filter seat 4 further includes a mounting shell 10 with a cavity inside, a mounting cover 11 detachably connected to the mounting shell 10, and a filter element 12 arranged between the mounting cover 11 and the mounting shell 10, wherein the mounting cover 11 is provided with a fixing groove 13 along the circumferential direction on the inner wall of the mounting shell 10, and at least one pair of rotatable fixing blocks 14 are provided on the connecting end 101 of the mounting shell 10 for being embedded in the fixing groove 13, and the fixing blocks 14 are rotatably connected to the mounting shell 10 through a rotating rod 15, so that A stop plate 16 is provided on the lower side of the connecting end 101 and along the circumference of the mounting shell 10. The stop plate 16 is provided with an annular protrusion 17 extending in the vertical direction on the side opposite to the mounting cover 11. An accommodating cavity 18 is formed between the annular protrusion 11 and the outer wall of the mounting shell 3. One end of a push block 19 movably provided on the outer wall of the mounting shell 10 is slidably mounted on the side of the annular protrusion 17 opposite to the accommodating cavity 18. The other end of the push block 19 is mounted on the mounting shell 10 and can be moved along the length of the mounting shell 10. The rotating rod 15 moves upward and downward, and the end of the rotating rod 15 away from the fixing block 14 can pass through the accommodating cavity 18 and be respectively threadedly connected with the pushing block 19 and rotatably connected with the mounting shell 10. When the mounting shell 10 is connected with the mounting cover 11, the pushing block 19 is first pushed to move upward, and one end of the pushing block 19 moves along the outer wall of the mounting shell 3, and the other end moves along the outer side of the annular protrusion 11, driving the rotating rod 15 to rotate and drive the fixing block 14 to rotate and recover to the side close to the cavity of the mounting shell 10, and then the connecting end of the mounting shell 10 is connected to the mounting cover 11. Then, the push block 19 is pushed downward, so that the rotating rod 15 is reversed to drive the fixing block 14 to rotate and embed into the fixing groove 13, so as to realize the connection between the mounting shell 10 and the mounting cover 11. When the mounting shell 10 and the mounting cover 11 are disassembled, the push block 19 is first pushed upward, and one end of the push block 19 moves along the outer wall of the mounting shell 3, and the other end moves along the outer side of the annular protrusion 11, so that the rotating rod 15 rotates to drive the fixing block 14 to disengage from the fixing groove 13, and then the connecting end of the mounting shell 10 is disengaged from the mounting cover 11.

[0022] The portion of the rotating rod 15 located in the accommodating chamber 18 is provided with a threaded groove 151 along its length direction for threaded connection with the push block 19, so that when the push block 19 moves the maximum distance on the rotating rod 15, the rotating rod 15 just rotates 180°. The personnel can roughly estimate the rotation angle of the fixed block 14 through the distance between the push block 19 and the limiting plate 16, which is convenient for the personnel to judge whether the fixed block 14 leaves the fixing groove 13. When the top of the pushing plate 19 contacts the bottom of the limiting plate 16, the push block 19 moves the maximum distance on the rotating rod 15. At this time, the rotating rod 15 just rotates 180°, ensuring that the fixed block 14 is completely disengaged from the fixing groove 13 before the next step of operation is performed, effectively avoiding the situation where the fixed block 14 is damaged due to excessive force when the fixed block 14 is not disengaged from the fixing groove 13, thereby improving the fool-proofness of the device.

[0023] An internal thread 111 is provided on the inner wall of the mounting cover 11, and an external thread 102 is provided on the circumferential outer wall of the connection end 101. The mounting cover 11 and the mounting shell 10 are threadedly connected, which improves the tightness and convenience of the connection between the mounting cover 11 and the mounting shell 10.

[0024] Preferably, the fixing groove 13 is located on the upper side of the internal thread 111, and the fixing block 14 is correspondingly arranged on the side of the connecting end 101 close to the mounting cover 11, so that after the mounting cover 11 and the mounting shell 10 are threadedly connected, the sealing between the connecting end 101 and the mounting cover 11 can be improved.

[0025] A spring 21 is located in the accommodating cavity 18 and is sleeved on the rotating rod 15, so that the push block 19 can be automatically reset. When the mounting shell 10 is connected to the mounting cover 11, the push block 19 is first pushed to move upward, and one end of the push block 19 moves along the outer wall of the mounting shell 3, and the other end moves along the outer side of the annular protrusion 11, driving the rotating rod 15 to rotate and drive the fixed block 14 to rotate and recover to the side close to the cavity of the mounting shell 10, and then the connecting end of the mounting shell 10 is connected to the mounting cover 11. Under the elastic force of the spring 21, the push block 19 moves downward, driving the rotating rod 15 to reverse and drive the fixed block 14 to rotate and embed into the fixed groove 13, so that the mounting shell 10 can be installed. The connection between 10 and the mounting cover 11, when the mounting shell 10 and the mounting cover 11 are disassembled, the push block 19 is first pushed to move upward, one end of the push block 19 moves along the outer wall of the mounting shell 3, and the other end moves along the outer side of the annular protrusion 11, so that the rotating rod 15 rotates to drive the fixed block 14 to disengage from the fixed groove 13, and the connecting end of the mounting shell 10 is disengaged from the mounting cover 11, and the movable block can also be automatically reset. The operation is simple and convenient, and it can effectively avoid the situation where the movable block moves and the fixed block is disengaged from the fixed groove due to accidental touch by personnel in a short time, further improving the stability of the connection of the filter seat itself, thereby improving the overall reliability.

[0026] The filter element 12 further includes a central tube 121 and a reverse osmosis membrane 122 wound on the central tube 121. Two end covers 123 are mounted on the central tube 121 and the reverse osmosis membrane 122 is located between the two end covers 123. Both ends of the central tube 121 can be exposed on opposite sides of the two end covers 123 and connected to pipelines on the mounting shell 10 and the mounting cover 11 respectively. A second through hole 1221 is provided on the reverse osmosis membrane 122.

[0027] The first filter seat 2, the second filter seat 3 and the third filter seat 4 have the same structure.

[0028] The filter elements 12 of the first filter seat 2 and the second filter seat 3 are respectively a composite filter element and a carbon rod filter element, which are used to filter out large particle impurities such as mud, sand, rust, algae, and residual chlorine.

[0029] The composite filter element is a combination of ultrafiltration membrane and activated carbon.

[0030] A first solenoid valve 23 is provided between the first filter seat 2 and the water inlet pipe 1 , and a second solenoid valve 24 is provided between the return pipe 9 and the pressure tank 5 .

[0031] A first check valve 25 is provided between the second solenoid valve 24 and the water inlet pipe 1 , and a second check valve 26 is provided on the connecting pipe 7 between the third filter seat 4 and the pressure barrel 5 .

[0032] A flushing valve 27 is provided between the third filter seat 4 and the waste water pipe 6 .

[0033] Embodiment 2: A reverse osmosis water purification system, comprising: a water inlet pipe 1, a first filter seat 2, a second filter seat 3 and a third filter seat 4 connected end to end in sequence, and a pressure barrel 5, wherein the top of the first filter seat 2 is connected to one end of the water inlet pipe 1, a booster pump 22 is arranged on the pipeline between the first filter seat 2 and the second filter seat 3, the bottom end of the third filter seat 4 is connected to a waste water pipe 6, and its circumferential outer wall is connected to the upper part of the pressure barrel 5 through a connecting pipe 7, the bottom end of the pressure barrel 5 is provided with a reflux pipe 9 connected to one end of the water inlet pipe 1 close to the first filter seat 2, and the water outlet pipe 8 is used to release the pure water in the pressure barrel 5; The third filter seat 4 further includes a mounting shell 10 with a cavity inside, a mounting cover 11 detachably connected to the mounting shell 10, and a filter element 12 arranged between the mounting cover 11 and the mounting shell 10, wherein the mounting cover 11 is provided with a fixing groove 13 along the circumferential direction on the inner wall of the mounting shell 10, and at least one pair of rotatable fixing blocks 14 are provided on the connecting end 101 of the mounting shell 10 for being embedded in the fixing groove 13, and the fixing blocks 14 are rotatably connected to the mounting shell 10 through a rotating rod 15, so that A stop plate 16 is provided on the lower side of the connecting end 101 and along the circumference of the mounting shell 10. The stop plate 16 is provided with an annular protrusion 17 extending in the vertical direction on the side opposite to the mounting cover 11. An accommodating cavity 18 is formed between the annular protrusion 11 and the outer wall of the mounting shell 3. One end of a push block 19 movably provided on the outer wall of the mounting shell 10 is slidably mounted on the side of the annular protrusion 17 opposite to the accommodating cavity 18. The other end of the push block 19 is mounted on the mounting shell 10 and can be moved along the length of the mounting shell 10. The rotating rod 15 moves upward and downward, and the end of the rotating rod 15 away from the fixing block 14 can pass through the accommodating cavity 18 and be respectively threadedly connected with the pushing block 19 and rotatably connected with the mounting shell 10. When the mounting shell 10 is connected with the mounting cover 11, the pushing block 19 is first pushed to move upward, and one end of the pushing block 19 moves along the outer wall of the mounting shell 3, and the other end moves along the outer side of the annular protrusion 11, driving the rotating rod 15 to rotate and drive the fixing block 14 to rotate and recover to the side close to the cavity of the mounting shell 10, and then the connecting end of the mounting shell 10 is connected to the mounting cover 11. Then, the push block 19 is pushed downward, so that the rotating rod 15 is reversed to drive the fixing block 14 to rotate and embed into the fixing groove 13, so as to realize the connection between the mounting shell 10 and the mounting cover 11. When the mounting shell 10 and the mounting cover 11 are disassembled, the push block 19 is first pushed upward, and one end of the push block 19 moves along the outer wall of the mounting shell 3, and the other end moves along the outer side of the annular protrusion 11, so that the rotating rod 15 rotates to drive the fixing block 14 to disengage from the fixing groove 13, and then the connecting end of the mounting shell 10 is disengaged from the mounting cover 11.

[0034] The portion of the rotating rod 15 located in the accommodating chamber 18 is provided with a threaded groove 151 along its length direction for threaded connection with the push block 19, so that when the push block 19 moves the maximum distance on the rotating rod 15, the rotating rod 15 just rotates 180°. The personnel can roughly estimate the rotation angle of the fixed block 14 through the distance between the push block 19 and the limiting plate 16, which is convenient for the personnel to judge whether the fixed block 14 leaves the fixing groove 13. When the top of the pushing plate 19 contacts the bottom of the limiting plate 16, the push block 19 moves the maximum distance on the rotating rod 15. At this time, the rotating rod 15 just rotates 180°, ensuring that the fixed block 14 is completely disengaged from the fixing groove 13 before the next step of operation is performed, effectively avoiding the situation where the fixed block 14 is damaged due to excessive force when the fixed block 14 is not disengaged from the fixing groove 13, thereby improving the fool-proofness of the device.

[0035] An internal thread 111 is provided on the inner wall of the mounting cover 11, and an external thread 102 is provided on the circumferential outer wall of the connection end 101. The mounting cover 11 and the mounting shell 10 are threadedly connected, which improves the tightness and convenience of the connection between the mounting cover 11 and the mounting shell 10.

[0036] The fixing groove 13 is arranged at the lower side of the internal thread 111 , the fixing block 14 is arranged between the limiting plate 16 and the external thread 102 , and a through hole 20 for the fixing block 14 to rotate is arranged on the circumferential outer wall of the connecting end 101 .

[0037] A first check valve 25 is provided between the second solenoid valve 24 and the water inlet pipe 1 , and a second check valve 26 is provided on the connecting pipe 7 between the third filter seat 4 and the pressure barrel 5 .

[0038] A flushing valve 27 is provided between the third filter seat 4 and the waste water pipe 6 .

[0039] The pressure barrel 5 is provided with an ultraviolet antibacterial lamp for irradiating the liquid stored in the pressure barrel 5 for sterilization.

[0040] A first solenoid valve 23 is provided between the first filter seat 2 and the water inlet pipe 1 , and a second solenoid valve 24 is provided between the return pipe 9 and the pressure tank 5 .

[0041] The working principle is as follows: tap water enters from the water inlet pipe and passes through the first filter seat. At the second filter seat, large particles of impurities such as mud, rust, algae, and residual chlorine are filtered out to ensure the quality of the incoming water. After pretreatment, the water enters the third filter seat through the booster pump. When the water passes through the reverse osmosis filter element, pure water and concentrated water are separated. The concentrated water is discharged through the waste water pipe, and the pure water enters the pressure barrel through the connecting pipe for storage. When water is needed, the water in the pressure barrel is discharged through the outlet pipe for use. When the water in the pressure barrel has not been used for a long time, the water in the pressure barrel can be discharged into the water inlet pipe through the reflux pipe to purify the water again.

[0042] The above-mentioned reverse osmosis water purification system is adopted, and its mounting cover is provided with a fixing groove in the circumferential direction along the inner wall of the mounting shell, and at least one pair of rotatable fixing blocks are provided on the connecting end of the mounting shell for embedding in the fixing groove. The fixing block is rotatably connected to the mounting shell through a rotating rod. Through the limiting effect of the fixing block and the fixing groove, a reliable and stable connection between the upper mounting cover and the lower mounting cover can be achieved, thereby avoiding the situation where the upper mounting cover and the lower mounting cover are separated due to vibration during long-term use, thereby improving the overall reliability.

[0043] Furthermore, a limit plate is provided at the lower side of the connecting end and along the circumference of the mounting shell, and an annular protrusion is extended in the vertical direction on one side of the limit plate opposite to the mounting cover, and a receiving cavity is formed between the annular protrusion and the outer wall of the mounting shell, and one end of a push block movably arranged on the outer wall of the mounting shell is slidably sleeved on the side of the annular protrusion opposite to the receiving cavity, and a person can roughly estimate the rotation angle of the fixed block by the distance between the push block and the limit plate, so that the person can judge whether the fixed block leaves the fixed groove, and when the top of the push plate contacts the bottom of the limit plate, the push block moves the maximum distance on the rotating rod, ensuring that the fixed block is completely separated from the fixed groove before the next step of operation is performed, effectively avoiding the situation in which the fixed block is damaged due to excessive force when the fixed block is not separated from the fixed groove, thereby improving the fool-proofness of the device; In addition, one end of the push block mounted on the outer wall of the mounting shell is slidably connected to the annular protrusion on the side of the mounting shell opposite to the mounting shell, and the other end of the push block can move up and down in the accommodating cavity along the length direction of the mounting shell, so as to achieve movement in the same direction on different straight lines of the push block, thereby improving the synchronization and stability of the movement of the push block, thereby ensuring the synchronization and smoothness of the rotation of the fixed block, greatly improving the accuracy of the fixed block being embedded in the fixed groove, effectively avoiding the situation where the push block is tilted and the fixed block fails to be fully embedded in the fixed groove, reducing the number of connection failures, and greatly improving the operating efficiency of personnel.

[0044] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A reverse osmosis water purification system, comprising: A water inlet pipe (1), a first filter seat (2), a second filter seat (3) and a third filter seat (4) connected in sequence end to end through a pipe, and a pressure barrel (5), wherein the top end of the first filter seat (2) is connected to one end of the water inlet pipe (1), a booster pump (22) is provided on the pipe between the first filter seat (2) and the second filter seat (3), the bottom end of the third filter seat (4) is connected to a waste water pipe (6), and the circumferential outer wall thereof is connected to the upper part of the pressure barrel (5) through a connecting pipe (7), the bottom end of the pressure barrel (5) is provided with a return pipe (9) connected to one end of the water inlet pipe (1) close to the first filter seat (2), and the water outlet pipe (8) is used to release the pure water in the pressure barrel (5); The third filter seat (4) further comprises a mounting shell (10) having a cavity therein, a mounting cover (11) detachably connected to the mounting shell (10), and a filter element (12) arranged between the mounting cover (11) and the mounting shell (10), wherein the mounting cover (11) is provided with a fixing groove (13) along the circumferential direction on the inner wall of the mounting shell (10), and at least one pair of rotatable fixing blocks (14) are provided on the connecting end (101) of the mounting shell (10) for being embedded in the fixing groove (13), and the fixing blocks (14) are rotatably connected to the mounting shell (10) via a rotating rod (15), and a limiting screw is provided on the lower side of the connecting end (101) and along the circumferential direction of the mounting shell (10). A positioning plate (16) is provided with an annular protrusion (17) extending in a vertical direction on a side of the limiting plate (16) opposite to the mounting cover (11); a receiving cavity (18) is formed between the annular protrusion (11) and the outer wall of the mounting shell (3); one end of a push block (19) movably arranged on the outer wall of the mounting shell (10) is slidably mounted on a side of the annular protrusion (17) opposite to the receiving cavity (18); the other end of the push block (19) is mounted on the mounting shell (10) and can move up and down along the length direction of the mounting shell (10); and the end of the rotating rod (15) away from the fixed block (14) can pass through the receiving cavity (18) and be respectively threadedly connected to the push block (19) and rotatably connected to the mounting shell (10).

2. The reverse osmosis water purification system according to claim 1, characterized in that: The portion of the rotating rod (15) located in the accommodating cavity (18) is provided with a thread groove (151) along its length direction for threaded connection with the push block (19), so that when the push block (19) moves a maximum distance on the rotating rod (15), the rotating rod (15) rotates exactly 180 degrees.

3. The reverse osmosis water purification system according to claim 2, characterized in that: A spring (21) is located in the accommodating chamber (18) and is sleeved on the rotating rod (15).

4. The reverse osmosis water purification system according to claim 2 or 3, characterized in that: An internal thread (111) is provided on the inner wall of the mounting cover (11), an external thread (102) is provided on the circumferential outer wall of the connection end (101), and the mounting cover (11) and the mounting shell (10) are threadedly connected.

5. The reverse osmosis water purification system according to claim 4, characterized in that: The fixing groove (13) is located on the upper side of the internal thread (111), and the fixing block (14) is correspondingly arranged on a side of the connection end (101) close to the mounting cover (11).

6. The reverse osmosis water purification system according to claim 4, characterized in that: The fixing groove (13) is arranged at the lower side of the internal thread (111), the fixing block (14) is arranged between the limiting plate (16) and the external thread (102), and a through hole (20) for the fixing block (14) to rotate is arranged on the circumferential outer wall of the connecting end (101).

7. The reverse osmosis water purification system according to claim 1, characterized in that: The filter element (12) of the third filter seat (4) further comprises a central tube (121) and a reverse osmosis membrane (122) rolled on the central tube (121); two end covers (123) are mounted on the central tube (121) and the reverse osmosis membrane (122) is located between the two end covers (123); two ends of the central tube (121) can be exposed at opposite sides of the two end covers (123) to communicate with pipelines on the mounting shell (10) and the mounting cover (11).

8. The water purification device with a reverse osmosis filter element assembly according to claim 1, characterized in that: The first filter seat (2), the second filter seat (3) and the third filter seat (4) have the same structure.

9. The water purification device with a reverse osmosis filter element assembly according to claim 1, characterized in that: The filter elements (12) of the first filter seat (2) and the second filter seat (3) are respectively a composite filter element and a carbon rod filter element.

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