A front filter with water cut-off pressure relief and convenient disassembly

Abstract

The utility model relates to a kind of front filter with water cut-off pressure relief and convenient disassembly, including head main body, filter bottle and the filter mechanism of being located in filter bottle, the head main body is equipped with water inlet port, water outlet port and assembly cavity, further including main body butt joint and adjusting assembly, the main body butt joint is fixed in the assembly port of filter bottle, and it is connected with head main body through rotating detachable connection anti-loose structure connection, the adjusting assembly includes driving part and adjusting piece, driving part is circumferentially rotationally connected with head main body, adjusting piece is axially slidably connected with head main body, driving part and adjusting piece between still being equipped with conversion cooperation part or conversion structure, under the action of external force, driving part can be circumferentially rotated relative to head main body, by conversion cooperation part or conversion structure, further drive adjusting piece axial sliding, realize the extrusion and extrusion release of rotating detachable connection structure.Looseness of connection structure can be effectively prevented, improve the sealing and reliability of front filter.

Description

Technical Field

[0001] This invention relates to a pre-filter that features water shut-off and pressure relief and is easy to disassemble, belonging to the technical field of water purification equipment. Background Technology

[0002] Municipal tap water suffers from secondary pollution such as pipe corrosion and sediment, leading to deterioration of household water quality. Pre-filters are typically installed on the inlet pipes to improve water quality. Current pre-filter technology includes: a unit, a filter bottle connected to the unit at the top, and a drain ball valve connected to the bottom of the filter bottle. The filter bottle contains a filter screen frame, and the filter screen is fitted onto the outer wall of the frame; collectively referred to as the filtration mechanism. During use, water flows from the inlet of the unit into the gap between the filter bottle and the filter screen. After being filtered, water flows into the center of the filter screen frame, and then from the center to the outlet of the unit. Pre-filters are now widely used in homes and high-end hotels.

[0003] The pre-filter head and filter bottle are usually connected by threads. For a tight and reliable connection, a detachable connection can be made by turning. Threaded connections are usually quite tight and require additional tools to disassemble the filter bottle, which is time-consuming and laborious, especially in some narrow installation spaces where large auxiliary tools are difficult to use.

[0004] One research approach is to adjust the rotational connection gap between the compressor head and the filter bottle, such as the thread clearance, to facilitate manual disassembly. However, this gap exists, posing a risk of water leakage over time. Furthermore, the threaded connection may loosen due to external environmental factors, exacerbating the risk of leakage. Additionally, during the disassembly process between the compressor head and the filter bottle, besides closing the valve, a significant amount of water inevitably accumulates in the pipeline and flows out to the disassembly site. In indoor applications, this can affect surrounding equipment and facilities. Therefore, it is necessary to control the outflow of water from the pipeline during disassembly.

[0005] Therefore, an optimized structure is needed to ensure that the threaded connection is easy to disassemble while improving its performance, i.e., preventing loosening of the threads, and also enabling water shut-off and pressure relief to prevent water leakage from the pipes. To this end, the researchers of this application, through structural optimization design and experimental simulation, developed a pre-filter with water shut-off and pressure relief capabilities that is easy to disassemble. This has achieved good results, effectively preventing loosening of the connection structure, ensuring a good seal, preventing water leakage from the waterproof pipes, and improving the service life and reliability of the pre-filter. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the threaded connection between the head and the filter bottle in existing pre-filters, and to provide a pre-filter with water cut-off and pressure relief and easy disassembly. Through structural optimization design and experimental simulation, good results have been achieved. It can effectively prevent the connection structure from loosening, ensure the sealing effect and prevent water accumulation in the waterproof pipe, and improve the service life and reliability of the pre-filter.

[0007] The technical solution adopted by this invention to solve its technical problem is: A pre-filter with water cut-off and pressure relief and easy disassembly includes a head body, a filter bottle, and a filtration mechanism disposed on the filter bottle. The head body has an inlet port, an outlet port, and an assembly cavity, and also includes a main body docking part and an adjustment component. The main body docking part is fixed to the assembly port of the filter bottle and connected to the head body through a rotatable detachable connection structure. The adjustment component includes a drive component and an adjustment component. The drive component is circumferentially rotatably connected to the head body, and the adjustment component is axially slidably connected to the head body. A conversion fit or conversion structure is also provided between the drive component and the adjustment component. Under the action of external force, the drive component can rotate circumferentially relative to the head body. Through the conversion fit or conversion structure, the adjustment component is driven to slide axially, realizing the compression and release of the rotatable detachable connection structure. It also includes a sealing structure, which can realize the compression and release of the sealing structure when the adjustment component slides axially. The drive component also has a flow channel switching structure, including an inlet flow channel, a central outlet cavity, an outlet flow channel, and a sealing element. When the drive component rotates, it can disconnect the inlet port and the outlet port.

[0008] This invention provides a pre-filter with water shut-off, pressure relief, and easy disassembly. Based on a head assembly structure similar to existing head structures, the head assembly features a rotatable drive component. Rotation drives an adjusting component to slide axially, effectively compressing the detachable rotating connection. Upon release of pressure, the seal disengages, and the detachable connection loosens, facilitating the removal of the filter bottle. This replaces the threaded connection between the head and filter bottle in existing technologies, which requires significant external force and space for disassembly. The drive component can be rotated using a wrench or a similar simple tool. The design of the sealing and flow channel switching structures achieves water shut-off, pressure relief, easy disassembly, and prevents water accumulation in the waterproof pipes from flowing out.

[0009] Preferably, the sealing element is arranged circumferentially along the inlet and outlet channels, and the inlet and outlet channels are provided with mounting grooves for accommodating the sealing element or mounting protrusions for fitting the sealing element.

[0010] Preferably, the bottom of the filter bottle is provided with a sewage discharge structure, and an elastic reset member is provided between the filter mechanism and the filter bottle. When the drive adjustment member slides axially to squeeze the rotatable detachable connection structure, the elastic reset member is compressed and the filter mechanism is placed inside the filter bottle; when the drive adjustment member slides axially to release the squeeze on the rotatable detachable connection structure, the elastic reset member is reset and the filter mechanism is lifted out of the filter bottle.

[0011] Preferably, the sewage discharge structure includes a sewage discharge connector and a sewage discharge valve. The sewage discharge connector is sealed to the sewage discharge port at the bottom of the filter bottle, and the sewage discharge valve is provided with the outlet end of the sewage discharge connector.

[0012] Preferably, the sealing structure is an annular sealing ring, and the lower end face of the adjusting member forms a driving surface. The driving surface can abut and release from the annular sealing ring, thereby realizing compression and release of compression.

[0013] Preferably, the driving surface has a horizontal driving part and an inclined guide part, and the angle between the planes containing the driving part and the guide part is an obtuse angle. The inclined guide part design provides space to accommodate the elastic deformation of the sealing structure, increases the sealing area, and improves the sealing effect.

[0014] Preferably, the main body of the filter head is provided with an isolation bushing that can isolate the main body of the filter head from water. The isolation bushing is made of an inert material or at least the surface in contact with water is coated with an inert material coating. The inert material is selected from any one of rubber, plastic and ceramic. The filter bottle is also provided with a water hammer structure.

[0015] Preferably, the adjustment component is located in the assembly cavity, the assembly cavity has a drive port, the adjustment component and the assembly cavity are axially slidably connected, the drive component has a central water outlet channel and a channel port adapted to the water outlet port, the drive end of the drive component is located at the drive port, and the drive component is axially fixed to the machine head body.

[0016] Preferably, the rotatable detachable connection structure is a threaded connection structure. The assembly cavity is divided into a first assembly cavity and a second assembly cavity from top to bottom. The driving component includes an outer driving part, an assembly part, and an inner driving part. The driving component is connected to the first assembly cavity through the assembly part. The adjusting component includes an assembly end and a movable end. The assembly end is connected to the inner driving part. The movable end is used to achieve axial sliding connection with the second assembly cavity. The movable end is used to compress and release the rotatable detachable connection structure.

[0017] Preferably, the adjusting component is a disc-type adjusting component, with the assembly end located on the upper side of the disc-type adjusting component. The assembly end is provided with at least one set of first sliding components with an inclined angle in the circumferential direction, and the inner driving part is provided with a matching second sliding component. The first and second sliding components are combined to form a conversion structure, which converts the circumferential rotation of the driving component into the axial sliding of the adjusting component.

[0018] Preferably, the inner drive unit is composed of an upper drive unit, an inner drive shaft, and a lower drive unit. The inner drive shaft is adapted to the assembly end of the adjusting member. Both the upper drive unit and the lower drive unit are provided with protrusions. The adjusting member is provided with a slide rail. The protrusions of the upper drive unit and the lower drive unit clamp the slide rail of the adjusting member in opposite directions.

[0019] Preferably, the adjusting component is a disc-type adjusting component, with the assembly end located on the upper side of the disc-type adjusting component. The assembly end is provided with a thread, and the inner driving part is provided with a matching thread. The thread combination forms a conversion mating part, which converts the circumferential rotation of the driving component into the axial sliding of the adjusting component.

[0020] Preferably, the main body connecting part and the filter bottle are integrally formed, or are separately formed and then sealed and fixed by a detachable structure. The external driving part is adapted to the driving port, and the external driving part is fixedly provided with a driving wrench.

[0021] Preferably, a positioning structure is provided between the adjusting member and the assembly cavity in the circumferential direction.

[0022] Preferably, the positioning structure is a combination structure of a groove and a slider or a combination structure of a shaft and a hole.

[0023] The beneficial effects of this invention are as follows: The pre-filter of this invention, which features water shut-off, pressure relief, and easy disassembly, is optimized, effectively preventing loosening of the connection structure. Furthermore, compared to traditional threaded connections, the gaps between the connection structures are movable, facilitating filter bottle disassembly while ensuring a tight seal and preventing water accumulation in the waterproof pipes. This pre-filter, with its water shut-off, pressure relief, and easy disassembly features, has achieved excellent results through structural optimization and experimental simulation. It effectively prevents loosening of the connection structure, ensures a tight seal, prevents water accumulation in the waterproof pipes, and improves the service life and reliability of the pre-filter. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the rotating detachable connection anti-loosening sealing structure of Embodiment 1; Figure 4 This is a detailed exploded view of the rotatable detachable anti-loosening sealing structure of Embodiment 1; Figure 5 This is a cross-sectional view (in the loosened state) of the rotatable detachable anti-loosening sealing structure of Embodiment 1. Figure 6 Example 1 is a cross-sectional view (pressed state) of the rotatable detachable anti-loosening sealing structure. Figure 7 This is a cross-sectional view of the pre-filter in Embodiment 1 of the present invention; Figure 8 This is a cross-sectional view of the pre-filter in Embodiment 1 of the present invention (where E indicates that both the inlet and outlet water are closed, F indicates that it is not compressed and does not form a seal, and G indicates that the threads are loose). Figure 9 This is another structural schematic diagram of Embodiment 1 of the present invention; Figure 10 yes Figure 9 A partial sectional view; Figure 11 yes Figure 9 A partial sectional view; Figure 12 This is an exploded view of the rotating detachable connection anti-loosening sealing structure of Embodiment 2; Figure 13 This is a schematic diagram of the structure of Example 3; In the diagram: 1. Head assembly; 2. Drive unit; 21. External drive unit; 22. Assembly unit; 23. Internal drive unit; 23a. Upper drive unit; 23b. Internal drive shaft; 23c. Lower drive unit; 3. Adjusting component; 4. Protrusion; 5. Drive wrench; 6. Slide rail; a. Main body docking component; b. Elastic reset component; c. Water inlet channel; d. Central water outlet chamber; e. Water outlet channel; f. Sealing element. Detailed Implementation

[0025] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. Example

[0026] like Figure 1-11As shown, a pre-filter with water cut-off and pressure relief and easy disassembly includes a main body 1, a filter bottle, and a filtration mechanism disposed on the filter bottle. The main body 1 has an inlet port, an outlet port, and an assembly cavity. It also includes a main body connector a and an adjustment assembly. The main body connector a is fixed to the assembly port of the filter bottle and is connected to the main body of the main body by a rotatable detachable connection structure. The adjustment assembly includes a drive component 2 and an adjustment component 3. The drive component 2 is rotatably connected to the main body 1 in the circumferential direction (or, if connected by a threaded rotation, relative axial fixation can also be achieved). The section 3 is axially slidably connected to the head body 1. A conversion mating part or conversion structure is also provided between the driving component 2 and the adjusting component 3. Under external force, the driving component 2 can rotate circumferentially relative to the head body 1. Through the conversion mating part or conversion structure, the adjusting component 3 is driven to slide axially, thereby achieving the compression and release of the rotating detachable connection structure. The driving component 2 also has a flow channel switching structure, including an inlet flow channel c, a central outlet cavity d, an outlet flow channel e, and a sealing element f. When the driving component 2 rotates, it can disconnect the inlet port and the outlet port. The sealing element is arranged circumferentially along the inlet flow channel c and the outlet flow channel e. The inlet flow channel c and the outlet flow channel e are provided with an assembly groove for accommodating the sealing element f or an assembly protrusion for fitting the sealing element f.

[0027] This invention provides a pre-filter with water shut-off, pressure relief, and easy disassembly. Based on a head assembly structure similar to existing head structures, the head assembly features a rotatable drive component. Rotation drives an adjusting component to slide axially, effectively compressing the detachable rotating connection. Upon release of pressure, the seal disengages, and the detachable connection loosens, facilitating the removal of the filter bottle. This replaces the threaded connection between the head and filter bottle in existing technologies, which requires significant external force and space for disassembly. The drive component can be rotated using a wrench or a similar simple tool. The design of the sealing and flow channel switching structures achieves water shut-off, pressure relief, easy disassembly, and prevents water accumulation in the waterproof pipes from flowing out.

[0028] Specifically, in this embodiment, the bottom of the filter bottle is provided with a drain structure, and an elastic reset member is provided between the filter mechanism and the filter bottle. When the drive adjustment member 3 slides axially to squeeze the rotatable detachable connection structure, the elastic reset member is compressed, and the filter mechanism is placed inside the filter bottle; when the drive adjustment member 3 slides axially to release the squeeze on the rotatable detachable connection structure, the elastic reset member is reset, and the filter mechanism is lifted to the outside of the filter bottle. The drain structure includes a drain connector and a drain valve. The drain connector is sealed to the drain port at the bottom of the filter bottle, and the drain valve is located at the outlet end of the drain connector. The machine head body 1 is provided with an isolation bushing that can isolate the machine head body 1 from water. The isolation bushing is made of an inert material or at least the surface in contact with water is coated with an inert material coating. The inert material is selected from any one of rubber, plastic, and ceramic. The filter bottle is also provided with a water hammer structure.

[0029] Specifically, in this embodiment, a sealing structure b is also included, and the adjusting member 3 can squeeze and release the sealing structure b when it slides axially.

[0030] Specifically, in this embodiment, the sealing structure b is an annular sealing ring, and the lower end face of the adjusting member 3 constitutes a driving surface. The driving surface can abut and release from the annular sealing ring, thereby realizing compression and release of compression.

[0031] More specifically, the driving surface has a horizontal driving part and an inclined guide part c, and the angle between the plane containing the driving part and the guide part c is an obtuse angle. The inclined guide part c design provides space to accommodate the elastic deformation of the sealing structure, increases the sealing area, and improves the sealing effect.

[0032] Specifically, in this embodiment, the assembly cavity is provided with a drive port, the outer wall of the adjusting member 3 is axially slidably connected to the inner wall of the assembly cavity, the drive member 2 is provided with a central water outlet channel and a channel port adapted to the water outlet port, and the drive end of the drive member 2 is located at the drive port.

[0033] Furthermore, the rotatable detachable connection structure is a threaded connection structure. The assembly cavity is divided into a first assembly cavity and a second assembly cavity from top to bottom. The driving component 2 includes an outer driving part 21, an assembly part 22, and an inner driving part 23. The driving component 2 is connected to the first assembly cavity through the assembly part 22. The adjusting component 3 includes an assembly end and a movable end. The assembly end is connected to the inner driving part 23, and the movable end is used to achieve axial sliding connection with the second assembly cavity. The movable end is used to achieve compression and release of the rotatable detachable connection structure.

[0034] In this embodiment, the adjusting member 3 is a disc-type adjusting member, with the assembly end located on the upper side of the disc-type adjusting member. The assembly end is provided with at least one set of first sliding members with an inclined angle in the circumferential direction, and the inner driving part 23 is provided with a matching second sliding member. The first sliding member and the second sliding member are combined to form a conversion structure, which converts the circumferential rotation of the driving member 2 into the axial sliding of the adjusting member 3.

[0035] In this embodiment, the inner drive unit 23 is composed of an upper drive unit 23a, an inner drive shaft 23b, and a lower drive unit 23c. The inner drive shaft 23b is adapted to the assembly end of the adjusting member 3. Both the upper drive unit 23a and the lower drive unit 23c are provided with protrusions 4. The adjusting member 3 is provided with a slide rail 6. The protrusions 4 of the upper drive unit 23a and the lower drive unit 23c clamp the slide rail 6 of the adjusting member 3 in opposite directions.

[0036] In this embodiment, the movable end of the adjusting member 3 is provided with a sealing element, which is made of an inert sealing material.

[0037] In this embodiment, the main body docking part a is integrally formed with the filter bottle, or it is formed separately and then sealed and fixed by a detachable structure. The driving end of the driving part 2 is adapted to the driving port, and the driving end is fixedly provided with a driving wrench 5.

[0038] In this embodiment, a positioning structure is provided between the adjusting member 3 and the assembly cavity in the circumferential direction.

[0039] In this embodiment, the positioning structure is a combination structure of a groove and a slider or a combination structure of a shaft and a hole. Example

[0040] like Figure 12 As shown, the basic structure is the same as in Embodiment 1, except that in this embodiment, the adjusting member 3 is a disc-type adjusting member, the assembly end is located on the upper side of the disc-type adjusting member, the assembly end is provided with a thread, the inner driving part 23 is provided with a matching thread, and the thread combination forms a conversion mating part, which converts the circumferential rotation of the driving member 2 into the axial sliding of the adjusting member 3. Example

[0041] like Figure 13 As shown, the basic structure is the same as in Embodiment 1, except that: the main body docking part a is provided with a rotatable and detachable connection structure between the main body docking part a and the machine head body. The machine head body is provided with several discontinuous slots in the circumference. The main body docking part a is provided with several matching discontinuous strips on the inner side. Through the cooperation of the strips and slots, the rotatable and detachable connection is achieved. Under the action of external force, the driving part 2 can rotate circumferentially relative to the machine head body 1. Through the conversion of the mating part or the conversion structure, the adjusting part 3 is driven to slide axially, thereby realizing the compression and release of the mating structure of the strips and slots.

[0042] The pre-filter of this invention, featuring water shut-off, pressure relief, and easy disassembly, is optimized to effectively prevent loosening of the connection structure. Furthermore, compared to traditional threaded connections, the gaps between the connection structures are movable, facilitating filter bottle disassembly and preventing water leakage from the waterproof pipes. This pre-filter, with its water shut-off, pressure relief, and easy disassembly features, has achieved excellent results through structural optimization and experimental simulation. It effectively prevents loosening of the connection structure and water leakage from the waterproof pipes, improving the service life and reliability of the pre-filter.

[0043] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A pre-filter with water cut-off and pressure relief and easy disassembly, comprising a head body (1), a filter bottle, and a filtration mechanism disposed on the filter bottle, wherein the head body (1) is provided with an inlet port, an outlet port, and an assembly cavity, characterized in that: It also includes a main body docking part (a) and an adjustment component. The main body docking part (a) is fixed to the assembly port of the filter bottle and is connected to the main body of the machine head (1) through a rotatable detachable connection structure. The adjustment component includes a driving part (2) and an adjustment part (3). The driving part (2) is rotatably connected to the main body of the machine head (1), and the adjustment part (3) is axially slidably connected to the main body of the machine head (1). A conversion fit part or conversion structure is also provided between the driving part (2) and the adjustment part (3). Under the action of external force, the driving part (2) can rotate circumferentially relative to the main body of the machine head (1). Through the conversion fit part or conversion structure, the adjustment part (3) is driven to slide axially, thereby realizing the squeezing and releasing of the rotatable detachable connection structure. It also includes a sealing structure. When the adjustment part (3) slides axially, it can realize the squeezing and releasing of the sealing structure. The driving part (2) is also provided with a flow channel switching structure, including an inlet flow channel (c), a central outlet cavity (d), an outlet flow channel (e), and a sealing element (f). When the driving part (2) rotates, it can disconnect the inlet port and the outlet port.

2. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 1, characterized in that, The sealing element (f) is arranged circumferentially along the inlet channel (c) and the outlet channel (e), and the inlet channel (c) and the outlet channel (e) are provided with an assembly groove for accommodating the sealing element (f) or an assembly protrusion for fitting the sealing element (f).

3. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 1, characterized in that, The bottom of the filter bottle is provided with a sewage discharge structure, and an elastic reset component is provided between the filter mechanism and the filter bottle. When the drive adjustment component (3) slides axially to squeeze the rotatable detachable connection structure, the elastic reset component is compressed and the filter mechanism is placed inside the filter bottle. When the drive adjustment component (3) slides axially to release the squeeze on the rotatable detachable connection structure, the elastic reset component is reset and the filter mechanism is lifted to the outside of the filter bottle.

4. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 3, characterized in that, The sewage discharge structure includes a sewage discharge connector and a sewage discharge valve. The sewage discharge connector is sealed to the sewage discharge port at the bottom of the filter bottle, and the sewage discharge valve is located at the outlet end of the sewage discharge connector.

5. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 1, 2, 3, or 4, characterized in that, The sealing structure is an annular sealing ring, and the lower end face of the adjusting member (3) forms a driving surface. The driving surface can abut and release the annular sealing ring, thereby realizing compression and release of compression.

6. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 5, characterized in that, The driving surface has a horizontal driving part and an inclined guide part, and the angle between the planes containing the driving part and the guide part is an obtuse angle.

7. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 1, 2, 3, or 4, characterized in that, The head body (1) is provided with an isolation bushing that can isolate the head body (1) from water. The isolation bushing is made of an inert material or at least the surface in contact with water is coated with an inert material coating. The inert material is selected from any one of rubber, plastic and ceramic. The filter bottle is also provided with a water hammer structure.

8. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 1, 2, 3, or 4, characterized in that, The assembly cavity is provided with a drive port, and the adjusting component (3) is axially slidably connected to the assembly cavity. The drive end of the driving component (2) is located at the drive port, and the driving component (2) is axially fixed to the machine head body (1).

9. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 8, characterized in that, The rotatable detachable connection structure is a threaded connection structure. The assembly cavity is divided into a first assembly cavity and a second assembly cavity from top to bottom. The driving component (2) includes an outer driving part (21), an assembly part (22) and an inner driving part (23). The driving component (2) is connected to the first assembly cavity through the assembly part (22). The adjusting component (3) includes an assembly end and a movable end. It is connected to the inner driving part (23) through the assembly end and achieves axial sliding connection through the cooperation of the movable end with the second assembly cavity. It achieves compression and release of the threaded connection structure through the movable end.

10. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 9, characterized in that, The adjusting component (3) is a disc-type adjusting component. The assembly end is located on the upper side of the disc-type adjusting component. The assembly end is provided with at least one set of first sliding components with an inclined angle in the circumferential direction. The inner driving part (23) is provided with a matching second sliding component. The first sliding component and the second sliding component are combined to form a conversion structure, which converts the circumferential rotation of the driving component (2) into the axial sliding of the adjusting component (3).

11. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 10, characterized in that, The inner drive unit (23) is composed of an upper drive unit (23a), an inner drive shaft (23b) and a lower drive unit (23c). The inner drive shaft (23b) is adapted to the assembly end of the adjusting member (3). Both the upper drive unit (23a) and the lower drive unit (23c) are provided with protrusions (4). The adjusting member (3) is provided with a slide rail (9). The protrusions (4) of the upper drive unit (23a) and the lower drive unit (23c) clamp the slide rail (9) of the adjusting member (3) in opposite directions.

12. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 10, characterized in that, The assembly end is provided with threads, and the inner drive part (23) is provided with matching threads. The thread combination forms a conversion mating part.

13. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 8, characterized in that, The driving end of the driving component (2) is adapted to the driving port, and the driving end is fixedly provided with a driving wrench (5).

14. A pre-filter with water cut-off and pressure relief and easy disassembly according to any one of claims 1, 2, 3, or 4, characterized in that, The main body docking part (a) is integrally formed with the filter bottle, or it is formed separately and then sealed and fixed by a detachable structure. The adjusting part (3) is provided with a positioning structure in the circumferential direction between it and the assembly cavity.

15. A pre-filter with water cut-off and pressure relief and easy disassembly according to claim 14, characterized in that, The positioning structure is a combination structure of a groove and a slider or a combination structure of a shaft and a hole.

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