High-flux stainless steel reverse osmosis membrane group and dynamic pressure balancing method thereof

Abstract

The invention discloses a high-flux stainless steel reverse osmosis membrane group and a dynamic pressure balancing method thereof, and relates to the technical field of water purification equipment. According to the invention, the effective filtering area is greatly increased by densely stacking the reverse osmosis filtering assemblies and the supporting separation nets in the stainless steel cylinder along the axial direction, and meanwhile, independent channels are arranged in all the reverse osmosis membrane assemblies, so that water flow can simultaneously realize reverse osmosis through a plurality of membrane assemblies under the action of pressure difference, and the flux of purified water is greatly improved; in the reverse osmosis process, non-penetrating fluid flows in the supporting separation net to form a continuous scouring effect on the surface of the reverse osmosis membrane, attached impurities are effectively removed, the surface of the membrane is automatically cleaned, the service life of the membrane is remarkably prolonged, and the consumable replacement frequency and the operation and maintenance cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification equipment, in particular to a high-flux stainless steel reverse osmosis membrane group and a dynamic pressure equalization method thereof. Background Art

[0002] In existing reverse osmosis water purification systems, membrane modules are often housed in plastic casings, with the membranes typically arranged as single sheets or wound in a roll-to-roll configuration. While these structures facilitate manufacturing and allow for a certain degree of assembly and integration, they present significant limitations during use.

[0003] First, there's typically no effective isolation support structure between reverse osmosis membranes, which are wound or pressed together to form a stack. This lack of independent support can easily lead to uneven pressure on the membranes, localized warping, or tension variations during operation.

[0004] Secondly, most existing systems utilize a "single-path centralized water inlet" water supply method, where water is fed uniformly from a central water inlet to the membrane module inlet, where it is then pumped to a certain pressure for reverse osmosis treatment. This single-path water supply often results in uneven water pressure distribution when multiple membrane modules are operating in parallel. This leads to differences in inlet pressure across different membrane regions, resulting in low permeation or even near-ineffective filtration in some modules, while others experience accelerated aging due to excessive pressure, significantly limiting the purification efficiency of the entire system. Summary of the Invention

[0005] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a high-flux stainless steel reverse osmosis membrane group, comprising a stainless steel cylinder, wherein the two ends of the stainless steel cylinder are respectively fixedly and sealedly installed with a first end cap and a second baffle, wherein the first end cap is fixedly installed with a water inlet connected to the interior of the stainless steel cylinder; the interior of the stainless steel cylinder is coaxially and alternately stacked with reverse osmosis filter components and support screens along its own axial direction, wherein the reverse osmosis filter component is formed by two circular reverse osmosis membranes that are bonded and sealed to form a hollow space inside the reverse osmosis filter component, and a circular hole is provided in the middle of the reverse osmosis filter component, and all the reverse osmosis filter components are connected by a sealing connection ring, which is used to seal the circular hole in the middle of the reverse osmosis filter component; two sealing strips are symmetrically fixedly installed on the inner wall of the stainless steel cylinder, the two sealing strips are used to fix and support all the support screens and reverse osmosis filter components, and the two sealing strips and all the alternately stacked support screens and reverse osmosis filter components separate the interior of the stainless steel cylinder into space a and space b, and space a and space b are osmotically connected through the support screen.

[0006] Preferably, a first baffle is fixedly installed on the inner wall of the stainless steel cylinder at one end of the first end cover, the first baffle is connected to the space a, and the first baffle is used to block the sealed space b (the first baffle is located on one side of the space a and is provided with an arc recess, so that the space between the first end cover and the first baffle is connected to the space a), and a gap is provided between the first baffle and the first end cover to facilitate the communication between the water inlet and the interior of the stainless steel cylinder.

[0007] Preferably, the second baffle is connected to space b, and the second baffle is used to block the sealed space a (the second baffle is located on one side of space b and is provided with an arc recess, so that the space between the guide isolation plate and the second baffle is connected to space b), and the stainless steel cylinder is located at one end of the second baffle and is fixedly and sealedly installed with an adjustment cavity, and a guide isolation plate is fixedly installed on the inner wall of the adjustment cavity, and a gap is set between the guide isolation plate and the second baffle, and the space between the guide isolation plate and the second baffle is connected to space b inside the stainless steel cylinder.

[0008] Preferably, the guide isolation plate is fixedly sealed and plugged with a drain outlet at the axial position, and the drain outlet passes through the second baffle and is connected to the internal seals of all reverse osmosis filter components. An adjustable drain hole is provided on the guide isolation plate, and an inner guide pipe and an outer guide pipe are provided on the side of the adjustable drain hole. The inner guide pipe, the outer guide pipe and the drain outlet are coaxially arranged, and a space is left between the outer guide pipe and the inner guide pipe to be aligned with the adjustable drain hole.

[0009] Preferably, a blade is rotatably mounted on the outer side of the inner guide tube through a blade bracket, an inner gear ring is fixed on the circumferential surface of the blade, an outer gear ring is coaxially arranged on the outer side of the inner gear ring, and the outer gear ring and the inner gear ring are meshed and driven by two control gears, the two control gears are symmetrically arranged, and both control gears are rotatably mounted on the control gear magnetic frame.

[0010] Preferably, an electromagnet is also fixedly mounted on the guide isolation plate, and the electromagnet is coaxially arranged with the control gear magnetic frame. A plurality of circular equidistant arrays of balls are embedded on the side of the control gear magnetic frame facing the electromagnet. The control gear magnetic frame cooperates with the electromagnet through rolling friction of the balls, and at the same time, the control gear magnetic frame cooperates with the electromagnet through magnetic force.

[0011] Preferably, a second end cover is fixedly sealed on the adjustment chamber, an adjustment drive sleeve is inserted into the axial position of the second end cover for rotational sealing, an adjustment drive ring is coaxially fixed to the outer side of the adjustment drive sleeve through a connecting rod, and the adjustment drive ring is coaxially fixed with the outer gear ring.

[0012] Preferably, the adjusting drive sleeve is rotated and sealed on the circumferential surface of the drain outlet, and the second end cover is also fixedly provided with a wastewater outlet, wherein a cavity is left between the adjusting chamber and the second end cover, and the second end cover is fixedly provided with a wastewater outlet connected to the cavity; the end of the adjusting drive sleeve located on the outside of the second end cover is fixedly provided with a driven sprocket, which is driven by a chain that cooperates with the driven sprocket (the device is arranged in an array, and the driven sprocket in each device is driven in series by a chain).

[0013] A method for controlling dynamic pressure balance in a high-flux stainless steel reverse osmosis membrane group includes the following steps: S1, opening a water inlet system to allow treated water to enter the front end of a stainless steel cylinder through a water inlet, and forming a pre-flow cavity between a first end cap and a first baffle; S2, water flows through the first baffle into space a inside the stainless steel cylinder, and permeates through a supporting screen to flow into space b; S3, a portion of the water passes through the reverse osmosis membrane of the reverse osmosis filter assembly under the action of a pressure difference, enters the hollow structure inside the reverse osmosis filter assembly, and is introduced into a drain outlet through an axial circular hole for centralized output to form a pure water flow; S4 , the non-permeated liquid continues to flow along space b, enters the regulating chamber through the second baffle and the regulating drain hole, and flushes the blades; S5, the control electromagnet automatically adjusts the magnetic strength according to the flow sensor signal, thereby controlling the rotational resistance of the control gear magnetic frame; S6, by adjusting the revolution and rotation states in the gear transmission relationship, the rotation speed of the blade is changed, thereby affecting the water flow disturbance intensity and local flow velocity; S7, an adjustable pressure difference is established on both sides of the membrane surface, forming a membrane surface pressure difference regulation closed-loop feedback mechanism, and realizing the consistency control of the filtration flux of each high-throughput stainless steel reverse osmosis membrane group.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention significantly increases the effective filtration area by densely stacking reverse osmosis filter components and supporting screens along the axial direction inside the stainless steel cylinder. At the same time, all reverse osmosis membrane components are provided with independent channels, and water can simultaneously pass through multiple membrane groups under the action of pressure difference to achieve reverse osmosis, thereby significantly improving the water purification flux; (2) During the reverse osmosis process, the non-permeate liquid flows in the supporting screen to continuously flush the surface of the reverse osmosis membrane, effectively remove attached impurities, automatically clean the membrane surface, significantly extend the service life of the membrane, and reduce the frequency of consumable replacement and operation and maintenance costs; (3) The water pressure in each reverse osmosis module of the present invention can be dynamically adjusted according to the flow rate, and the control mechanism can effectively balance the pressure difference between the modules in the array system, improve the stability of the system, and avoid the overall performance degradation due to the low efficiency of a certain component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the driven sprocket of the present invention.

[0016] Figure 2 It is a schematic diagram of the water inlet structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the sealing strip of the present invention.

[0019] Figure 5 This is a structural diagram of the first baffle of the present invention.

[0020] Figure 6 This is a schematic diagram of the internal structure of the second end cover of the present invention.

[0021] Figure 7 Schematic diagram of the internal structure of the regulating chamber of the present invention.

[0022] Figure 8 This is a structural diagram of the control gear magnetic frame of the present invention.

[0023] Figure 9 This is a structural diagram of the inner guide tube of the present invention.

[0024] Figure 10 For the present invention Figure 9 Schematic diagram of the structure at point A in the middle.

[0025] Figure 11 This is a structural diagram of the drainage hole adjustment of the present invention.

[0026] Figure 12 This is a schematic structural diagram of the guide isolation plate of the present invention.

[0027] Figure 13 This is a structural diagram of the second baffle of the present invention.

[0028] Figure 14 This is an array diagram of the reverse osmosis filtration component of the present invention.

[0029] Figure 15 This is a schematic diagram of the supporting screen structure of the present invention.

[0030] Figure 16 This is a diagram of the sealing connection ring array of the present invention.

[0031] In the figure: 101-stainless steel cylinder; 102-first end cover; 103-water inlet; 104-first baffle; 105-sealing strip; 106-second baffle; 107-adjusting chamber; 108-second end cover; 109-adjusting drive ring; 110-adjusting drive sleeve; 111-driven sprocket; 112-drain outlet; 113-waste outlet; 114-connecting rod; 115-outer gear ring; 116-control gear magnetic frame; 117-inner guide pipe; 118-guide isolation plate; 119-adjusting drain hole; 120-paddle; 121-paddle bracket; 122-control gear; 123-electromagnet; 124-reverse osmosis filter assembly; 125-sealing connecting ring; 126-supporting screen; 127-outer guide pipe; 128-inner gear ring. DETAILED DESCRIPTION

[0032] The following is combined with Figures 1-16 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0033] The present invention provides a high-flux stainless steel reverse osmosis membrane group, comprising a stainless steel cylinder 101, wherein a first end cap 102 and a second baffle 106 are fixedly and sealedly installed at both ends of the stainless steel cylinder 101, wherein the first end cap 102 is fixedly installed with a water inlet 103 communicating with the interior of the stainless steel cylinder 101; the interior of the stainless steel cylinder 101 is coaxially and alternately stacked with reverse osmosis filter components 124 and support screens 126 along its own axial direction, wherein the reverse osmosis filter components 124 are formed by two circular reverse osmosis membranes being bonded and sealed, so that a hollow space is formed inside the reverse osmosis filter components 124, and the reverse osmosis filter components 124 are A circular hole is provided in the middle, and all the reverse osmosis filter components 124 are connected by a sealing connection ring 125, which is used to seal the circular hole in the middle of the reverse osmosis filter component 124; two sealing strips 105 are symmetrically fixedly installed on the inner wall of the stainless steel cylinder 101, and the two sealing strips 105 are used to fix and support all the supporting meshes 126 and the reverse osmosis filter components 124, and the two sealing strips 105 and all the alternately stacked supporting meshes 126 and the reverse osmosis filter components 124 divide the interior of the stainless steel cylinder 101 into space a and space b, and space a and space b are osmotic connected through the supporting mesh 126. A first baffle 104 is fixedly installed on the inner wall of the stainless steel cylinder 101 at one end of the first end cover 102. The first baffle 104 is connected to the space a. The first baffle 104 is used to block the sealed space b (the first baffle 104 is located on one side of the space a and is provided with an arc recess, so that the space between the first end cover 102 and the first baffle 104 is connected to the space a). A gap is provided between the first baffle 104 and the first end cover 102 to facilitate the communication between the water inlet 103 and the interior of the stainless steel cylinder 101. The second baffle 106 is connected to the space b, and the second baffle 106 is used to block the sealed space a (the second baffle 106 is located on one side of the space b and is provided with an arc recess, so that the space between the guide isolation plate 118 and the second baffle 106 is connected to the space b), and the stainless steel cylinder 101 is located at one end of the second baffle 106 and is fixedly and sealedly installed with an adjustment chamber 107, and a guide isolation plate 118 is fixedly installed on the inner wall of the adjustment chamber 107, and a gap is set between the guide isolation plate 118 and the second baffle 106, and the space between the guide isolation plate 118 and the second baffle 106 is connected to the space b inside the stainless steel cylinder 101.

[0034] The axial position of the guide isolation plate 118 is fixedly sealed and plugged with a drain port 112, which passes through the second baffle 106 and is connected to the internal seals of all reverse osmosis filter components 124. An adjustable drain hole 119 is provided on the guide isolation plate 118, and an inner guide pipe 117 and an outer guide pipe 127 are provided on the side of the adjustable drain hole 119. The inner guide pipe 117, the outer guide pipe 127 and the drain port 112 are coaxially arranged, and a space is left between the outer guide pipe 127 and the inner guide pipe 117 to be aligned with the adjustable drain hole 119. A blade 120 is rotatably mounted on the outer side of the inner guide tube 117 via a blade bracket 121. An inner gear ring 128 is fixedly sleeved on the circumferential surface of the blade 120. An outer gear ring 115 is coaxially mounted on the outer side of the inner gear ring 128. Two control gears 122 mesh with each other and transmit power. The two control gears 122 are symmetrically arranged and both are rotatably mounted on the control gear magnetic frame 116. An electromagnet 123 is also fixedly mounted on the guide isolation plate 118. The electromagnet 123 is coaxially arranged with the control gear magnetic frame 116. The side of the control gear magnetic frame 116 facing the electromagnet 123 is embedded with a plurality of circular, equidistant arrays of balls. The control gear magnetic frame 116 and the electromagnet 123 engage in rolling friction, while the control gear magnetic frame 116 and the electromagnet 123 engage magnetically. A second end cover 108 is fixedly sealed on the adjustment chamber 107, and an adjustment drive sleeve 110 is inserted into the axial position of the second end cover 108 for rotational sealing. An adjustment drive ring 109 is coaxially fixed to the outside of the adjustment drive sleeve 110 through a connecting rod 114, and the adjustment drive ring 109 is coaxially fixed with the outer gear ring 115.

[0035] The adjusting drive sleeve 110 is rotatably sealed and sleeved on the circumferential surface of the drain outlet 112. The second end cover 108 is also fixedly provided with a wastewater outlet 113. A cavity is left between the adjusting chamber 107 and the second end cover 108, and the second end cover 108 is fixedly provided with a wastewater outlet 113 connected to the cavity. The end of the adjusting drive sleeve 110 located on the outside of the second end cover 108 is fixedly sleeved with a driven toothed disc 111, which is driven by a chain that cooperates with the driven toothed disc 111 (the device is arranged in an array, and the driven toothed disc 111 in each device is driven in series by a chain).

[0036] The operating principle of a high-flux stainless steel reverse osmosis membrane module disclosed herein is as follows: the water inlet 103 is connected to the water to be treated (the municipal water pipe is connected to the water inlet 103 via a series water pump). Water enters the space between the first end cap 102 and the first baffle 104 through the water inlet 103, and then enters the space a inside the stainless steel cylinder 101. Due to the obstruction of the two sealing strips 105, the water flows into the space b through the support screen 126 (the support screen 126 is provided to separate the two adjacent reverse osmosis filter modules 124 to facilitate water flow). During this process, under the action of water pressure, some water passes through the reverse osmosis membranes on the reverse osmosis filter modules 124, enters the interior of the reverse osmosis filter modules 124, and then flows through the axial position of the reverse osmosis filter modules 124 to the drain outlet 112 (all reverse osmosis filter modules 124 are the same, which can obtain a larger filtration area and thus improve the water purification flux). The drain outlets 112 of all devices are arranged in parallel to guide the purified pure water to the designated location. During this process, the substances intercepted by the reverse osmosis membrane will adhere to the side facing the support screen 126, but since the water at this position is in a flowing state, these intercepted substances will be washed away, thereby ensuring the cleanliness of the reverse osmosis membrane and improving its service life.

[0037] After water enters the internal space b of the stainless steel cylinder 101, it will pass through the second baffle 106, then flow to between the guide isolation plate 118 and the second baffle 106, then flow through the adjustment drain hole 119 to between the inner guide pipe 117 and the outer guide pipe 127, and then flow to between the adjustment chamber 107 and the second end cover 108, and finally the wastewater that flushes the substances intercepted on the surface of the reverse osmosis membrane is discharged through the wastewater outlet 113. All wastewater outlets 113 are arranged in parallel to guide the wastewater to the designated location. However, during the flow of water, the paddle 120 will be flushed and rotated, and the rotation of the paddle 120 will drive the inner gear ring 128 to rotate, and the rotation of the inner gear ring 128 will drive the control gear 122 to rotate, and the rotation of the control gear 122 will drive the outer gear ring 115 and the control gear magnetic frame 116 to rotate (the electromagnet 123 is not started). When it is necessary to adjust the filtration pressure (to adjust the filtration speed and increase the flux, a flow sensor is provided inside the drain outlet 112 corresponding to each stainless steel cylinder 101 to monitor the flow rate of filtered water in each device in real time, and dynamically adjust the size of the magnetic force generated by the electromagnet 123 according to the flow rate to ensure that the speed of filtering water for each device is the same). The driving motor drives all the driven sprockets 111 in each device of the array to rotate through the chain. The rotation of the driven sprocket 111 drives the adjustment drive sleeve 110 to rotate. The adjustment drive sleeve 110 rotates and drives the connecting rod 114 and the adjustment drive ring 109 to rotate. The adjustment drive ring 109 drives the outer gear ring 115 to rotate. The outer gear ring 115 drives the control gear 122 to revolve and rotate. Then, part of the power is applied to the inner gear ring 128, thereby driving the inner gear ring 128 to rotate, and then driving the blade 120 to rotate. However, in this process, the control gear magnetic frame 116 can be controlled by controlling the magnetic force of the electromagnet 123. The rotational friction between the electromagnet 123 and the control gear magnetic frame 116 controls the resistance encountered during its rotation (i.e., the revolution of the control gear 122). When the control gear magnetic frame 116 is completely stationary, the full power of the outer ring gear 115 is transmitted to the inner ring gear 128 via the control gear 122. At this time, the paddle 120 rotates at its fastest speed. The rotation of the paddle 120 drives the water flow in the opposite direction, thereby hindering the water flow. At this time, the water pressure within the stainless steel cylinder 101 increases, which in turn increases the pressure differential across the reverse osmosis membrane of the reverse osmosis filter assembly 124, thereby increasing the water filtration rate. Therefore, by controlling the magnetic force of the electromagnet 123, the rotational speed of the paddle 120, that is, the resistance to the water flow, and thus the water filtration rate, can be controlled.

[0038] It should be noted that the length of the stainless steel cylinder 101 in the figure is not the actual length. For the convenience of description, the length is shortened. By stacking the reverse osmosis filter components 124 and the supporting screen 126 along the axial direction of the stainless steel cylinder 101, it can be effectively ensured that the filtration pressure of the reverse osmosis membrane in each reverse osmosis filter component 124 is consistent.

Claims

1. A high-flux stainless steel reverse osmosis membrane group, characterized by: It comprises a stainless steel cylinder (101), with a first end cover (102) and a second baffle (106) fixedly and sealedly mounted on both ends of the stainless steel cylinder (101), wherein a water inlet (103) communicating with the interior of the stainless steel cylinder (101) is fixedly mounted on the first end cover (102); The interior of the stainless steel cylinder (101) is provided with reverse osmosis filter assemblies (124) and supporting screens (126) stacked alternately along the axis of the stainless steel cylinder (101), wherein the reverse osmosis filter assembly (124) is formed by two circular reverse osmosis membranes that are bonded and sealed, so that a hollow space is formed inside the reverse osmosis filter assembly (124), and a circular hole is provided in the middle of the reverse osmosis filter assembly (124). All the reverse osmosis filter assemblies (124) are connected by a sealing connection ring (125), and the sealing connection ring (125) is used to seal the circular hole in the middle of the reverse osmosis filter assembly (124); Two sealing strips (105) are symmetrically fixedly installed on the inner wall of the stainless steel cylinder (101), and the two sealing strips (105) are used to fix and support all the supporting screens (126) and the reverse osmosis filter assembly (124). The two sealing strips (105) and all the alternately stacked supporting screens (126) and the reverse osmosis filter assembly (124) separate the interior of the stainless steel cylinder (101) into space a and space b, and space a and space b are osmotically connected through the supporting screens (126).

2. A high flux stainless steel reverse osmosis membrane group according to claim 1, characterized in that: A first baffle (104) is fixedly mounted on the inner wall of the stainless steel cylinder (101) at one end of the first end cover (102). The first baffle (104) is in communication with the space a and is used to shield the sealed space b. A gap is provided between the first baffle (104) and the first end cover (102) to facilitate communication between the water inlet (103) and the interior of the stainless steel cylinder (101).

3. A high flux stainless steel reverse osmosis membrane group according to claim 2, characterized in that: The second baffle (106) is in communication with the space b. The second baffle (106) is used to shield the sealed space a. The stainless steel cylinder (101) is located at one end of the second baffle (106) and is fixedly and sealedly installed with an adjustment chamber (107). A guide isolation plate (118) is fixedly installed on the inner wall of the adjustment chamber (107). A gap is provided between the guide isolation plate (118) and the second baffle (106). The space between the guide isolation plate (118) and the second baffle (106) is in communication with the space b inside the stainless steel cylinder (101).

4. A high-flux stainless steel reverse osmosis membrane assembly according to claim 3, characterized in that: The guide isolation plate (118) is fixedly sealed and plugged with a drain port (112) at the axial position. The drain port (112) passes through the second baffle (106) and is connected to the internal sealing of all reverse osmosis filter components (124). An adjustable drain hole (119) is provided on the guide isolation plate (118). An inner guide pipe (117) and an outer guide pipe (127) are provided on the side of the adjustable drain hole (119). The inner guide pipe (117), the outer guide pipe (127) and the drain port (112) are coaxially arranged. A space aligned with the adjustable drain hole (119) is reserved between the outer guide pipe (127) and the inner guide pipe (117).

5. A high flux stainless steel reverse osmosis membrane group according to claim 4, characterized in that: The outer side of the inner guide tube (117) is rotatably mounted with a blade (120) via a blade bracket (121); an inner gear ring (128) is fixedly sleeved on the circumferential surface of the blade (120); an outer gear ring (115) is coaxially arranged on the outer side of the inner gear ring (128); the outer gear ring (115) and the inner gear ring (128) are meshed and driven by two control gears (122); the two control gears (122) are symmetrically arranged, and both control gears (122) are rotatably mounted on the control gear magnetic frame (116).

6. A high-flux stainless steel reverse osmosis membrane assembly according to claim 5, characterized in that: An electromagnet (123) is also fixedly mounted on the guide isolation plate (118). The electromagnet (123) is coaxially arranged with the control gear magnetic frame (116). A plurality of circular equidistant arrays of balls are embedded on a side of the control gear magnetic frame (116) facing the electromagnet (123). The control gear magnetic frame (116) and the electromagnet (123) are engaged in rolling friction through the balls, and the control gear magnetic frame (116) and the electromagnet (123) are engaged in magnetic force.

7. The high-flux stainless steel reverse osmosis membrane assembly according to claim 6, characterized in that: A second end cover (108) is fixedly sealed on the regulating chamber (107), an regulating drive sleeve (110) is inserted into the axial center position of the second end cover (108) through a rotary seal, and an regulating drive ring (109) is coaxially fixed to the outer side of the regulating drive sleeve (110) through a connecting rod (114), and the regulating drive ring (109) is coaxially fixedly matched with the outer gear ring (115).

8. The high-flux stainless steel reverse osmosis membrane assembly according to claim 7, characterized in that: The regulating drive sleeve (110) is rotatably sealed and sleeved on the circumferential surface of the drain port (112). The second end cover (108) is also fixedly provided with a wastewater port (113). A cavity is left between the regulating chamber (107) and the second end cover (108), and the second end cover (108) is fixedly provided with a wastewater port (113) in communication with the cavity. One end of the adjustment drive sleeve (110) located outside the second end cover (108) is fixedly sleeved with a driven toothed disc (111) and is driven by a chain that is in transmission cooperation with the driven toothed disc (111).

9. A method for controlling dynamic pressure balance using a high-flux stainless steel reverse osmosis membrane group as claimed in claim 8, characterized in that: The following steps are involved: S1. Turn on the water inlet system to allow the treated water to enter the front end of the stainless steel cylinder (101) through the water inlet (103), and form a pre-flow cavity between the first end cover (102) and the first baffle (104); S2, water flows through the first baffle (104) into space a inside the stainless steel cylinder (101), and penetrates through the supporting screen (126) into space b; S3, part of the water passes through the reverse osmosis membrane of the reverse osmosis filter assembly (124) under the action of the pressure difference, enters the internal hollow structure of the reverse osmosis filter assembly (124), and is introduced into the drain outlet (112) through the axial circular hole to be concentrated and output to form a pure water flow; S4, the unpenetrated liquid continues to flow along the space b, passes through the second baffle (106) and the regulating drainage hole (119), enters the regulating chamber (107), and washes the blade (120); S5, controlling the electromagnet (123) to automatically adjust the magnetic strength according to the flow sensor signal, thereby controlling the rotational resistance of the control gear magnetic frame (116); S6, by adjusting the revolution and rotation states in the gear transmission relationship, changing the rotation speed of the blade (120), thereby affecting the water flow disturbance intensity and local flow velocity; S7. An adjustable pressure difference is established on both sides of the membrane surface to form a closed-loop feedback mechanism for membrane surface pressure difference regulation, thereby achieving consistent control of the filtration flux of each high-flux stainless steel reverse osmosis membrane group.

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