Tensioning and positioning structure of RO (Reverse Osmosis) membrane filter element

Abstract

The tensioning and positioning structure comprises a guide driving component, a positioning sleeve and a plurality of tensioning pieces, the positioning sleeve is axially provided with a containing cavity, a plurality of mounting holes communicated with the containing cavity are formed in the side wall of the positioning sleeve at intervals in the circumferential direction, the end of the guide driving component is movably arranged in the containing cavity in a penetrating mode, and the tensioning pieces are arranged in the containing cavity. The plurality of tensioning pieces are arranged in the corresponding mounting holes in a sliding manner; an outer supporting guiding inclined face matching set and an inner retracting guiding inclined face matching set are arranged between the guiding driving component and the tensioning pieces, under the guiding effect of the outer supporting guiding inclined face matching set, the multiple tensioning pieces can extend outwards from the interiors of the corresponding mounting holes relative to the positioning sleeve to be in an opening state, and under the guiding effect of the inner retracting guiding inclined face matching set, the tensioning pieces can stretch outwards from the interiors of the corresponding mounting holes to be in an opening state. And the plurality of tensioning pieces can retract into the corresponding mounting holes relative to the positioning sleeve to a storage state. The device has the effects that the filter element is efficiently and stably positioned, and the switching mode of fixing the filter element and releasing the filter element is quicker.

Description

Technical Field

[0001] This utility model relates to the field of filter element processing technology, and in particular to a tensioning and positioning structure for an RO membrane filter element. Background Technology

[0002] During the processing of RO membrane filter cartridges, it is necessary to position the filter cartridges with RO membranes wound around them to facilitate processing. In factories, a linear module is usually used to drive the positioning shaft to insert into the central tube of the filter cartridge to fix the filter cartridge. However, since the diameter of the central tube of different models of filter cartridges is different, it is now necessary to develop a device that can position filter cartridges of different diameters.

[0003] A Chinese patent with publication number CN207548011U discloses a handlebar anti-sway welding positioning device, belonging to the field of tricycle accessory technology. It includes an upper positioning rod and a lower positioning rod, both of which are cylindrical in shape. The upper end of the upper positioning rod has a stepped bottom diameter that decreases from top to bottom, forming a fixed step. The lower end of the lower positioning rod also has a stepped bottom diameter that decreases from bottom to top, forming a fixed step. The lower end of the upper positioning rod has a reduced bottom diameter, forming a connecting end. The lower end of the connecting end has an external fixing thread, and the lower positioning rod has an internal fixing thread. The handlebar anti-sway welding positioning device also includes a collar that can be fitted onto the lower positioning rod. This device can achieve positioning of handlebars of different sizes and types.

[0004] Referring to the positioning structure of the aforementioned positioning device, existing technologies also employ similar methods. This involves setting the end of the positioning shaft into multiple coaxial fixed steps of varying diameters, using these different diameter fixed steps to position and insert the central tubes of different filter cartridge models. However, this positioning method still presents a problem: even for filter cartridges of the same model, differences in the diameter of the central tube due to batch variations or processing equipment can prevent the fixed steps from being smoothly inserted into the filter cartridge's central tube. This results in the filter cartridge wobbling during processing, or the fixed steps being forcibly squeezed into the filter cartridge's central tube. While this prevents wobbling during processing, removing the filter cartridge from the fixed steps afterwards is extremely cumbersome. To address these shortcomings, there is an urgent need to develop a device that efficiently positions and detaches filter cartridges more quickly. Utility Model Content

[0005] The purpose of this invention is to provide a tensioning and positioning structure for an RO membrane filter element, which has the advantages of efficient and stable filter element positioning and a faster switching method for fixing and releasing the filter element.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a tensioning and positioning structure for an RO membrane filter element, comprising a guide drive component, a positioning sleeve and a plurality of tensioning components, wherein the positioning sleeve has an axially opened accommodating cavity, and the side wall of the positioning sleeve has a plurality of mounting holes that communicate with the accommodating cavity at intervals along the circumferential direction, the end of the guide drive component is movably inserted into the accommodating cavity, and the plurality of tensioning components are slidably disposed in the corresponding mounting holes;

[0007] The guide drive component and the tensioning component are provided with an outer support guide inclined surface mating group and an inner retraction guide inclined surface mating group. Under the guiding action of the outer support guide inclined surface mating group, several tensioning components can extend outward from the corresponding mounting hole to the open state relative to the positioning sleeve. Under the guiding action of the inner retraction guide inclined surface mating group, several tensioning components can retract into the corresponding mounting hole to the storage state relative to the positioning sleeve.

[0008] By adopting the above technical solution, when the positioning sleeve is inserted into the central tube of the filter element, the guide drive component is pushed into the accommodating cavity. Under the guidance of the external support guide inclined surface assembly, several tensioning components extend outward from the mounting hole to the open state, so that the outer walls of the multiple tensioning components press against the central tube of the filter element, thereby achieving positioning and preventing rotation of the filter element. This can effectively prevent the filter element from accidentally rotating during processing. After the filter element processing is completed, by pulling the guide drive component in the accommodating cavity in the extraction direction, under the guidance of the internal retraction guide inclined surface assembly, several tensioning components are pulled back into the mounting hole to the storage state, releasing the external support clamping effect of the tensioning components on the central tube of the filter element, and separating the tensioning components from the filter element. In this way, this utility model can use the tensioning positioning structure to fix or release the filter element, which has the effects of efficient and stable filter element positioning and faster conversion between fixing and releasing the filter element.

[0009] A further feature of this invention is that the guiding drive component includes a central drive rod, a guide sleeve, and a guide cap. The guide sleeve is coaxially fixed to the outside of the central drive rod, and the guide cap is coaxially fixed to the end of the central drive rod. The outer support guide slope is fitted between the outer wall of the guide sleeve and the corresponding tensioning member, and the inner shrink guide slope is fitted between the inner wall of the guide cap and the corresponding tensioning member.

[0010] Under the guiding action of the external support guide inclined surface assembly, several tensioning members can extend outward from the corresponding mounting holes relative to the central drive rod;

[0011] Under the guidance of the inward-retracting guide ramp assembly, several tensioning members can retract inward relative to the central drive rod into the corresponding mounting holes.

[0012] By adopting the above technical solution, and utilizing the guiding effect of the external support guide inclined surface assembly and the internal retraction guide inclined surface assembly, when the guide drive component extends into the accommodating cavity, the tensioning component can automatically extend outward to the open state from the mounting hole, and when the guide drive component moves from the accommodating cavity in the extraction direction, the tensioning component can automatically retract into the mounting hole to the storage state.

[0013] A further feature of this invention is that the guide cap has an avoidance groove corresponding to the tensioning member. When the guide driving member slides axially within the accommodating cavity, the guide cap avoids and guides the corresponding tensioning member through the avoidance groove.

[0014] By adopting the above technical solution, when the guide drive component slides axially in the accommodating cavity, the guide cap and the tensioning component can be effectively avoided by using the avoidance channel, thus preventing jamming. In addition, the avoidance channel can also limit the sliding direction of the guide drive component, preventing the guide drive component from rotating during the sliding process and improving the consistency of the translation direction of the guide drive component.

[0015] A further feature of this invention is that the external support guide inclined surface assembly includes a first external support guide inclined surface and a second external support guide inclined surface. The first external support guide inclined surface is disposed on the side wall of the guide sleeve, and the second external support guide inclined surface is disposed on the side of the tensioning member near the central drive rod. The first external support guide inclined surface and the corresponding second external support guide inclined surface guide each other in a guiding engagement.

[0016] A further feature of this invention is that the inward-shrinking guide slope mating assembly includes a first inward-shrinking guide slope and a second inward-shrinking guide slope. The first inward-shrinking guide slope is disposed on the inner wall of the guide cap, and a guide portion extends from the side of the tensioning member. The second inward-shrinking guide slope is disposed on the side of the guide portion away from the central drive rod, and the first inward-shrinking guide slope and the corresponding second inward-shrinking guide slope are guided and mated.

[0017] A further feature of this invention is that the guide portion is symmetrically arranged on both sides of the tensioning member.

[0018] By adopting the above technical solution, the symmetrically arranged guide parts make the stress on both sides of the tensioning member more uniform, which is conducive to improving the cooperation effect between the second inward guide slope of the tensioning member and the first inward guide slope on the guide cap, making the guide sliding of the tensioning member in the mounting hole smoother.

[0019] A further feature of this invention is that the end face of the tensioning member facing the outside of the mounting hole is an arc surface, and the tensioning member has a plurality of pressing protrusions along the length direction on the arc surface.

[0020] By adopting the above technical solution, the arc-shaped end face of the tensioner allows for a tighter fit between the outer wall of the tensioner and the central tube of the filter element. The addition of the pressing ridges increases the pressing force of the tensioner on the central tube of the filter element, thereby improving the anti-slip effect between the tensioner and the central tube of the filter element when they are in the open state.

[0021] A further feature of this invention is that the end of the positioning sleeve is provided with an air pressure balance hole that communicates with the accommodating cavity.

[0022] By adopting the above technical solution, the addition of the air pressure balance hole ensures that the inside of the cavity and the outside atmosphere are always connected through the air pressure balance hole when the guide drive component slides in the cavity, thereby enabling the guide drive component to slide smoothly in the cavity.

[0023] A further feature of this invention is that it includes a linear drive module, which is used to drive the guide drive member to slide axially within the accommodating cavity.

[0024] A further feature of this invention is that it includes a rotary drive module, which includes a drive motor, a drive wheel, and a driven wheel. A rotary sleeve assembly is coaxially fixedly connected to the end of the positioning sleeve, and the driven wheel is coaxially fixedly connected to the outside of the rotary sleeve assembly. The drive motor drives the drive wheel to rotate, and the drive wheel can drive the driven wheel to rotate via a transmission belt.

[0025] By adopting the above technical solution, the rotary drive module can drive the positioning sleeve to rotate, thereby causing the filter element positioned on the positioning sleeve to rotate.

[0026] In summary, this utility model has the following beneficial effects:

[0027] A guide drive component is movably inserted into the accommodating cavity of the positioning sleeve, and a tensioning component is slidably installed in the mounting hole of the positioning sleeve. The guide drive component includes a central drive rod, a guide sleeve and a guide cap fixedly connected to the central drive rod. The outer wall of the guide sleeve and the corresponding tensioning component are guided and engaged by an outer support guide ramp fitting group, and the inner wall of the guide cap and the corresponding tensioning component are guided and engaged by an inner retraction guide ramp fitting group. Under the guiding action of the outer support guide ramp fitting group, when the guide drive component extends into the accommodating cavity, the tensioning component can automatically extend outward to the open state from the mounting hole, so that the outer walls of multiple tensioning components abut against the... The central tube of the filter element is used to position and prevent rotation of the filter element, which can effectively prevent the filter element from rotating accidentally during processing. Under the guidance of the inward guide inclined surface assembly, when the guide drive moves from the accommodating cavity in the extraction direction, the tensioning member can automatically retract into the mounting hole to the storage state, releasing the external support clamping effect of the tensioning member on the central tube of the filter element, and separating the tensioning member from the filter element. In this way, this utility model can use the tensioning positioning structure to fix or release the filter element, which has the effects of efficient and stable filter element positioning and faster conversion between fixing and releasing the filter element. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the present invention.

[0029] Figure 2 This is a utility model Figure 1 A longitudinal sectional view.

[0030] Figure 3 This is a utility model Figure 2 A magnified view of a portion of region A in the middle.

[0031] Figure 4 This is a cross-sectional view of the tensioning and positioning structure of this utility model located at the guide section.

[0032] Figure 5 This is an exploded view of the tensioning and positioning structure of this utility model.

[0033] Figure 6 This is a partial longitudinal sectional view of the tensioning and positioning structure of this utility model positioned in the central tube of the filter element.

[0034] In the diagram: 1. Guide drive component; 11. Central drive rod; 12. Guide sleeve; 12a. First outer support guide ramp; 13. Guide cap; 13a. Clearance channel; 13b. First inward retraction guide ramp; 2. Positioning sleeve; 2a. Accommodation cavity; 2b. Mounting hole; 2c. Air pressure balance hole; 21. Rotating sleeve assembly; 3. Tensioning component; 3a. Second outer support guide ramp; 31. Guide part; 31a. Second inward retraction guide ramp; 32. Pressing ridge; 4. Linear drive module; 5. Rotary drive module; 51. Drive motor; 52. Drive wheel; 53. Transmission belt; 54. Driven wheel; 6. Adjustment drive module; 61. Telescopic cylinder; 62. Sliding plate; 7. Filter element; 7a. Central tube. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] A tensioning and positioning structure for an RO membrane filter cartridge, such as Figure 1-2 and Figure 6 As shown, the device includes a guide drive component 1, a positioning sleeve 2, and several tensioning components 3. The positioning sleeve 2 has an axially oriented cavity 2a, and its sidewall has several circumferentially spaced mounting holes 2b communicating with the cavity 2a. The end of the guide drive component 1 is movably inserted into the cavity 2a, and the tensioning components 3 are slidably disposed in the corresponding mounting holes 2b. An outer support guide inclined surface assembly and an inner retraction guide inclined surface assembly are provided between the guide drive component 1 and the tensioning components 3. Under the guidance of the outer support guide inclined surface assembly, the tensioning components 3 can extend outward from the corresponding mounting holes 2b relative to the positioning sleeve 2 to an open state. Under the guidance of the inner retraction guide inclined surface assembly, the tensioning components 3 can be pulled back into the corresponding mounting holes 2b relative to the positioning sleeve 2 to a retracted state. The device also includes a linear drive module 4 and a rotary drive module 5. The linear drive module 4 is used to drive the guide drive component 1 in the cavity 2a. The axial sliding within cavity 2a is achieved by a rotary drive module 5, which includes a drive motor 51, a drive wheel 52, and a driven wheel 54. A rotary sleeve assembly 21 is coaxially fixedly connected to the end of the positioning sleeve 2, and the driven wheel 54 is coaxially fixedly connected to the outside of the rotary sleeve assembly 21. The drive motor 51 drives the drive wheel 52 to rotate, and the drive wheel 52 can drive the driven wheel 54 to rotate through the transmission belt 53. The rotary drive module 5 can drive the positioning sleeve 2 to rotate, thereby causing the filter element 7 positioned on the positioning sleeve 2 to rotate. In addition, an adjustment drive module 6 is provided, which includes a telescopic cylinder 61, a sliding plate 62 located at the output end of the telescopic cylinder 61, a tensioning positioning structure, a linear drive module 4, and a rotary drive module 5, all of which are located on the sliding plate 62. By adjusting the drive module 6, the sliding seat can be driven to move linearly, thereby causing the positioning sleeve 2 to be inserted into or removed from the central tube 7a of the filter element 7.

[0037] like Figure 2-6As shown, the guide drive component 1 includes a central drive rod 11, a guide sleeve 12, and a guide cap 13. The guide sleeve 12 is coaxially fixed outside the central drive rod 11, and the guide cap 13 is coaxially fixedly connected to the end of the central drive rod 11. An outer support guide ramp is fitted between the outer wall of the guide sleeve 12 and the corresponding tensioning member 3, and an inner retraction guide ramp is fitted between the inner wall of the guide cap 13 and the corresponding tensioning member 3. Under the guiding action of the outer support guide ramp fitting, several tensioning members 3 can extend outward from the corresponding mounting hole 2b relative to the central drive rod 11; under the guiding action of the inner retraction guide ramp fitting, several tensioning members 3 can retract inward into the corresponding mounting hole 2b relative to the central drive rod 11, utilizing the outer support... The guiding action of the guide ramp engagement group and the inward guide ramp engagement group allows the tensioning member 3 to automatically extend outward to the open state when the guide drive member 1 extends into the receiving cavity 2a, and the tensioning member 3 to automatically retract into the receiving hole 2b when the guide drive member moves outward from the receiving cavity 2a in the withdrawal direction; the outer support guide ramp engagement group includes a first outer support guide ramp 12a and a second outer support guide ramp 3a arranged opposite to each other. The first outer support guide ramp 12a is located on the side wall of the guide sleeve 12, and the second outer support guide ramp 3a is located on the side of the tensioning member 3 near the central drive rod 11. The first outer support guide ramp 12a and the corresponding second outer support guide ramp 3a are guided and matched. The tensioning member 3 is assembled with a first recessed guide slope 13b and a second recessed guide slope 31a, which are arranged opposite each other. The first recessed guide slope 13b is located on the inner wall of the guide cap 13. Guide portions 31 are symmetrically arranged on both sides of the tensioning member 3. The second recessed guide slope 31a is located on the side of the guide portion 31 away from the central drive rod 11. The first recessed guide slope 13b and the corresponding second recessed guide slope 31a are guided and engaged. The symmetrical arrangement of the guide portions 31 makes the stress on both sides of the tensioning member 3 more uniform, which is beneficial to improving the engagement effect between the second recessed guide slope 31a of the tensioning member 3 and the first recessed guide slope 13b on the guide cap 13. This ensures that the tensioning member 3 is properly positioned within the mounting hole 2b. The internal guiding and sliding is smoother; in this embodiment, the guide drive component 1 is provided with a clearance channel 13a corresponding to the tensioning component 3. When the guide drive component 1 slides axially in the accommodating cavity 2a, the guide drive component 1 avoids and guides the corresponding tensioning component 3 through the clearance channel 13a, so that when the guide drive component 1 slides axially in the accommodating cavity 2a, the clearance channel 13a can be used to achieve effective clearance between the guide drive component 1 and the tensioning component 3, preventing jamming. In addition, the clearance channel 13a can also limit the sliding direction of the guide drive component 1, prevent the guide drive component 1 from rotating during the sliding process, and improve the consistency of the translation direction of the guide drive component 1.

[0038] like Figure 1 , Figure 3 and Figure 6As shown, the end face of the tensioning member 3 facing the outside of the mounting hole 2b is set as an arc surface, and the tensioning member 3 is provided with a number of pressing protrusions 32 along the length direction on the arc surface. The arc surface end face of the tensioning member 3 can make the outer wall of the tensioning member 3 fit more tightly with the central tube 7a of the filter element 7. The addition of the pressing protrusions 32 can increase the pressing force of the tensioning member 3 on the central tube 7a of the filter element 7, thereby improving the anti-slip effect between the tensioning member 3 and the central tube 7a of the filter element 7 when it is in the open state. The end of the positioning sleeve 2 is provided with an air pressure balance hole 2c that connects to the accommodating cavity 2a. The addition of the air pressure balance hole 2c can keep the interior of the accommodating cavity 2a connected to the outside atmosphere through the air pressure balance hole 2c when the guide drive member 1 slides in the accommodating cavity 2a, thereby enabling the guide drive member 1 to slide smoothly in the accommodating cavity 2a.

[0039] The basic working principle of this utility model is as follows: A guide drive component 1 is movably inserted into the accommodating cavity 2a of the positioning sleeve 2, and a tensioning component 3 is slidably installed in the mounting hole 2b of the positioning sleeve 2. The guide drive component 1 includes a central drive rod 11, a guide sleeve 12 fixedly connected to the central drive rod 11, and a guide cap 13. The outer wall of the guide sleeve 12 and the corresponding tensioning component 3 are guided and engaged by an external support guide inclined surface fitting group, and the inner wall of the guide cap 13 and the corresponding tensioning component 3 are guided and engaged by an internal shrink guide inclined surface fitting group. When the positioning sleeve 2 is inserted into the central tube 7a of the filter element 7, it pushes the guide drive component 1 into the accommodating cavity 2a. Under the guiding action of the external support guide inclined surface fitting group, when the guide drive component 1 extends into the accommodating cavity 2a, the tensioning component 3... The tensioning element 3 can automatically extend outward to the open state from the mounting hole 2b, so that the outer walls of multiple tensioning elements 3 abut against the central tube 7a of the filter element 7, thereby positioning and preventing the filter element 7 from rotating unexpectedly during processing. When the positioning sleeve 2 is pulled out from the central tube 7a of the filter element 7, under the guidance of the inward guide inclined surface assembly, the tensioning element 3 can automatically retract into the mounting hole 2b to the storage state, releasing the external support and clamping effect of the tensioning element 3 on the central tube 7a of the filter element 7, and separating the tensioning element 3 from the filter element 7. In this way, the present invention can use the tensioning positioning structure to fix or release the filter element 7, which has the effects of efficient and stable filter element positioning and faster conversion between fixing and releasing the filter element.

[0040] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A tensioning and positioning structure for an RO membrane filter element, characterized in that: It includes a guide drive component (1), a positioning sleeve (2) and several tensioning components (3). The positioning sleeve (2) has an axial cavity (2a) and several mounting holes (2b) that communicate with the cavity (2a) are spaced apart along the circumferential direction on the side wall of the positioning sleeve (2). The end of the guide drive component (1) is movably inserted into the cavity (2a) and several tensioning components (3) are slidably disposed in the corresponding mounting holes (2b). The guide drive component (1) and the tensioning component (3) are provided with an outer support guide inclined surface mating group and an inner retraction guide inclined surface mating group. Under the guiding action of the outer support guide inclined surface mating group, a number of tensioning components (3) can extend outward from the corresponding mounting hole (2b) relative to the positioning sleeve (2) to the open state. Under the guiding action of the inner retraction guide inclined surface mating group, a number of tensioning components (3) can retract into the corresponding mounting hole (2b) relative to the positioning sleeve (2) to the storage state.

2. The tensioning and positioning structure of an RO membrane filter element according to claim 1, characterized in that: The guide drive component (1) includes a central drive rod (11), a guide sleeve (12), and a guide cap (13). The guide sleeve (12) is coaxially fixed outside the central drive rod (11), and the guide cap (13) is coaxially fixedly connected to the end of the central drive rod (11). The outer support guide slope is fitted between the outer wall of the guide sleeve (12) and the corresponding tensioning member (3), and the inner shrink guide slope is fitted between the inner wall of the guide cap (13) and the corresponding tensioning member (3). Under the guiding action of the external support guide inclined surface assembly, several tensioning members (3) can extend outward from the corresponding mounting holes (2b) relative to the central drive rod (11); Under the guiding action of the inward-retracting guide ramp assembly, several tensioning members (3) can retract inward relative to the central drive rod (11) into the corresponding mounting hole (2b).

3. The tensioning and positioning structure of an RO membrane filter element according to claim 2, characterized in that: The guide cap (13) has a clearance channel (13a) corresponding to the tensioning member (3). When the guide drive member (1) slides axially in the accommodating cavity (2a), the guide cap (13) avoids and guides the corresponding tensioning member (3) through the clearance channel (13a).

4. The tensioning and positioning structure of an RO membrane filter element according to claim 2, characterized in that: The external support guide inclined surface assembly includes a first external support guide inclined surface (12a) and a second external support guide inclined surface (3a). The first external support guide inclined surface (12a) is located on the side wall of the guide sleeve (12), and the second external support guide inclined surface (3a) is located on the side of the tensioning member (3) near the central drive rod (11). The first external support guide inclined surface (12a) and the corresponding second external support guide inclined surface (3a) are guided and engaged.

5. The tensioning and positioning structure of an RO membrane filter element according to claim 2, characterized in that: The inward-shrinking guide ramp assembly includes a first inward-shrinking guide ramp (13b) and a second inward-shrinking guide ramp (31a). The first inward-shrinking guide ramp (13b) is disposed on the inner wall of the guide cap (13). The tensioning member (3) has a guide portion (31) extending from its side. The second inward-shrinking guide ramp (31a) is disposed on the side of the guide portion (31) away from the central drive rod (11). The first inward-shrinking guide ramp (13b) and the corresponding second inward-shrinking guide ramp (31a) are guided and engaged.

6. The tensioning and positioning structure of an RO membrane filter element according to claim 5, characterized in that: The guide portion (31) is symmetrically arranged on both sides of the tensioner (3).

7. The tensioning and positioning structure of an RO membrane filter element according to claim 1, characterized in that: The end face of the tensioning member (3) facing the outside of the mounting hole (2b) is set as an arc surface, and the tensioning member (3) is provided with a plurality of pressing protrusions (32) along the length direction on the arc surface.

8. The tensioning and positioning structure of an RO membrane filter element according to claim 1, characterized in that: The end of the positioning sleeve (2) is provided with an air pressure balance hole (2c) that connects to the accommodating cavity (2a).

9. The tensioning and positioning structure of an RO membrane filter element according to claim 1, characterized in that: It also includes a linear drive module (4) for driving the guide drive member (1) to slide axially within the accommodating cavity (2a).

10. The tensioning and positioning structure of an RO membrane filter element according to claim 1, characterized in that: It also includes a rotary drive module (5), which includes a drive motor (51), a drive wheel (52) and a driven wheel (54). The positioning sleeve (2) is coaxially fixedly connected to a rotary sleeve assembly (21), and the driven wheel (54) is coaxially fixedly connected to the outside of the rotary sleeve assembly (21). The drive motor (51) drives the drive wheel (52) to rotate, and the drive wheel (52) can drive the driven wheel (54) to rotate through a transmission belt (53).

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