Pre-filter with water cut-off and pressure relief functions and convenient to disassemble

Abstract

The invention relates to a pre-filter with water cut-off pressure relief and convenient disassembly, which comprises a machine head main body, a filter bottle and a filter mechanism arranged on the filter bottle, the machine head main body is provided with a water inlet port, a water outlet port and an assembly cavity, the pre-filter also comprises a main body butt joint piece and an adjusting assembly, the main body butt joint piece is fixed on the assembly port of the filter bottle, and the adjusting assembly is fixed on the main body butt joint piece. The adjusting assembly is connected with the machine head body through a rotary detachable connection anti-loosening structure and comprises a driving piece and an adjusting piece, the driving piece is connected with the machine head body in a circumferential rotating mode, the adjusting piece is connected with the machine head body in an axial sliding mode, and a conversion matching part or a conversion structure is further arranged between the driving piece and the adjusting piece. The driving piece can rotate in the circumferential direction relative to the machine head body, and further drives the adjusting piece to slide in the axial direction through the conversion matching part or the conversion structure, so that extrusion and extrusion release of the rotary detachable connecting structure are achieved. Loosening of the connecting structure can be effectively prevented, and the sealing performance and reliability of the pre-filter are improved.

Description

Technical Field

[0001] The invention relates to a pre-filter with water-cut-off pressure relief and easy disassembly, belonging to the technical field of water purification equipment. Background Art

[0002] Municipal tap water suffers from secondary pollution such as pipe corrosion and sediment, which deteriorates the quality of household water. Pre-filters are usually installed on household pipes to improve the water quality. The existing pre-filters include: a machine head, a filter bottle connected to the machine head at the upper end, and a drain ball valve connected to the lower end of the filter bottle. A filter mesh frame is provided in the filter bottle, and a filter mesh is provided on the outer wall of the filter mesh frame, collectively referred to as a filtering mechanism. During use, water flows from the water inlet of the machine head into the gap between the filter bottle and the filter mesh, is filtered by the filter mesh, flows into the center of the filter mesh frame, and then flows from the center of the filter mesh frame to the water outlet of the machine head. Pre-filters have now penetrated into thousands of households and high-end hotels.

[0003] The head of the pre-filter and the filter bottle are usually connected by threads. In order to ensure the tightness and reliability of the connection, the detachable connection such as the threaded connection is usually relatively tight and requires additional tools to remove the filter bottle, which is time-consuming and labor-intensive, especially in some narrow installation spaces where large auxiliary tools are difficult to use.

[0004] One research and development approach is to adjust the rotational connection gap between the handpiece and the filter bottle, such as the thread gap, to facilitate manual disassembly. However, the presence of this gap creates a risk of water seepage over time. Furthermore, threaded connections can become loosened over time due to environmental influences, exacerbating the risk of water seepage. Furthermore, during the disassembly process between the handpiece and the filter bottle, in addition to closing the valve, a large amount of water inevitably accumulates in the pipes, flowing out to the disassembly site. This can affect surrounding equipment and facilities in indoor applications, necessitating the need to control the outflow of water from the pipes during disassembly.

[0005] To this end, it is necessary to design an optimized structure to ensure that the threaded connection is easy to disassemble while improving the effect of the threaded connection, that is, by preventing the threads from loosening, and being able to cut off the water flow and release the pressure, thus preventing the water from flowing out of the pipe. To this end, the researchers of this application, through structural optimization design and experimental simulation, have developed a pre-filter with water-cutting and pressure-relieving functions and easy disassembly, which has achieved good results, can effectively prevent the loosening of the connection structure, and ensure the sealing effect and prevent the water from flowing out of the waterproof pipe, thereby improving the service life and reliability of the pre-filter. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the threaded connection between the head of the pre-filter and the filter bottle in the prior art, and to provide a pre-filter with water-cutting and pressure-relieving functions and easy disassembly. After structural optimization design and experimental simulation, good results have been achieved. It can effectively prevent the loosening of the connection structure, ensure the sealing effect and prevent water from flowing out of the waterproof pipe, and improve the service life and reliability of the pre-filter.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] A pre-filter with water-cutting and pressure-relieving functions and easy disassembly comprises a head body, a filter bottle and a filtering mechanism arranged on the filter bottle, the head body being provided with a water inlet port, a water outlet port and an assembly cavity, and also comprising a main body docking piece and an adjustment component, the main body docking piece being fixed to the assembly port of the filter bottle and being connected to the head body by a rotating and detachable connection structure, the adjustment component comprising a driving piece and an adjusting piece, the driving piece being circumferentially rotatably connected to the head body, the adjusting piece being axially slidably connected to the head body, a conversion fitting part or a conversion structure being further provided between the driving piece and the adjusting piece, under the action of external force, the driving piece can circumferentially rotate relative to the head body, and through the conversion fitting part or the conversion structure, the adjusting piece is driven to slide axially, thereby squeezing and releasing the squeezing of the rotating and detachable connection structure; a sealing structure is also included, and the squeezing and releasing of the sealing structure can be achieved when the adjusting piece slides axially; the driving piece is also provided with a flow channel switching structure, comprising a water inlet flow channel, a central water outlet cavity, a water outlet flow channel and a sealing element, and when the driving piece rotates, the water inlet port and the water outlet port can be disconnected.

[0009] The pre-filter of the present invention has the function of water-cutting and pressure-relieving and is easy to disassemble. Its basic structure is based on the machine head assembly, which corresponds to the machine head structure of the prior art. The machine head assembly is provided with a rotatable driving member. By rotating, the adjusting member is driven to slide axially, that is, the rotating detachable connection structure is squeezed by extrusion. After the squeezing is released, the seal is disengaged, and the rotating detachable connection structure is loosened, which is convenient for receiving and disassembling the filter bottle. It replaces the threaded connection between the machine head and the filter bottle of the prior art. The threaded connection requires a large external force and a large space for disassembly. However, the present invention does not require this. The rotation of the driving member can be achieved by using a special-shaped wrench or a similar simple result that can drive the driving member to rotate. Through the design of the sealing structure and the flow channel switching structure, water-cutting and pressure-relieving, easy disassembly, and outflow of water from the waterproof pipe are achieved.

[0010] Preferably, the sealing element is arranged along the circumference of the water inlet flow channel and the water outlet flow channel, and the water inlet flow channel and the water outlet flow channel are provided with an assembly groove for accommodating the sealing element or an assembly protrusion for sleeve-mounting the sealing element.

[0011] Preferably, a sewage discharge structure is provided at the bottom of the filter bottle, and an elastic reset member is provided between the filter mechanism and the filter bottle. When the driving adjustment member slides axially to squeeze the rotating detachable connection structure, the elastic reset member is compressed and the filter mechanism is placed in the filter bottle; when the driving adjustment member slides axially to release the squeezing of the rotating detachable connection structure, the elastic reset member is reset and the filter mechanism is lifted up to the outside of the filter bottle.

[0012] Preferably, the sewage discharge structure includes a sewage discharge connector and a sewage discharge valve. The sewage discharge connector is sealed with the sewage discharge port at the bottom of the filter bottle, and the sewage discharge valve is provided with an outlet end of the sewage discharge connector.

[0013] Preferably, the sealing structure is an annular sealing ring, and the lower end surface of the adjusting member constitutes a driving surface, which can abut and release the abutment with the annular sealing ring, thereby achieving extrusion and release of extrusion.

[0014] Preferably, the driving surface is provided with a horizontal driving portion and an inclined guiding portion, and the angle between the planes where the driving portion and the guiding portion lie is an obtuse angle. The inclined guiding portion design leaves room for elastic deformation of the sealing structure, increases the sealing area, and improves the sealing effect.

[0015] Preferably, an isolation bushing is provided in the head body to isolate the head body from water. The isolation bushing is made of 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 prevention structure.

[0016] Preferably, the adjustment component is arranged in the assembly cavity, the assembly cavity is provided with a driving port, the adjustment member assembly cavities are axially slidingly connected, the driving member is provided with a central water outlet channel and a channel port adapted to the water outlet port, the driving end of the driving member is provided at the driving port, and the driving member is axially fixed to the head body.

[0017] Preferably, the assembly cavity is divided into a first assembly cavity and a second assembly cavity from top to bottom, the driving member includes an external driving part, an assembly part and an internal driving part, the driving member is connected to the first assembly cavity through the assembly part, the adjusting member includes an assembly end and a movable end, is connected to the inner driving part through the assembly end, and an axial sliding connection is achieved through the cooperation of the movable end with the second assembly cavity, and the extrusion and release of the rotating detachable connection structure are achieved through the movable end.

[0018] Preferably, the adjusting member is a disc-type adjusting member, the assembly end is arranged on the upper side of the disc-type adjusting member, the assembly end is circumferentially provided with at least one group of first sliding parts with an inclined angle, the internal driving part is provided with an adaptive second sliding part, the first and second sliding parts are combined to form a conversion structure, which converts the circumferential rotation of the driving member into the axial sliding of the adjusting member.

[0019] Preferably, the inner driving part is composed of an upper driving part, an inner driving shaft and a lower driving part, the inner driving shaft is adapted to the assembly end of the adjusting part, the upper driving part and the lower driving part are both provided with protrusions, the adjusting part is provided with a slide rail, and the protrusions of the upper driving part and the lower driving part clamp the slide rail of the adjusting part toward each other.

[0020] Preferably, the adjusting member is a disc-type adjusting member, the assembly end is arranged on the upper side of the disc-type adjusting member, the assembly end is provided with a thread, the inner driving part is provided with an adaptive thread, and the thread combination forms a conversion fitting part, which converts the circumferential rotation of the driving member into the axial sliding of the adjusting member.

[0021] Preferably, the main body docking piece 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 a driving wrench is fixedly provided on the external driving part.

[0022] Preferably, a positioning structure is provided between the adjusting member and the circumference of the assembly cavity.

[0023] Preferably, the positioning structure is a matching structure of a sliding groove and a slider or a matching structure of a shaft and a hole.

[0024] The beneficial effects of the present invention are as follows: the pre-filter with water-cutting pressure relief and easy disassembly of the present invention is optimized, which can effectively prevent the connection structure from loosening, and compared with the traditional threaded connection method, the gap between the connection structures is movable, which is convenient for the disassembly of the filter bottle and ensures the sealing effect and the outflow of water from the waterproof pipe. The pre-filter with water-cutting pressure relief and easy disassembly has achieved good results after structural optimization design and experimental simulation. It can effectively prevent the loosening of the connection structure, ensure the sealing effect and the outflow of water from the waterproof pipe, and improve the service life and reliability of the pre-filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is an exploded schematic diagram of the present invention;

[0027] Figure 3 This is a schematic structural diagram of the rotatable and detachable connection anti-loosening sealing structure of Example 1;

[0028] Figure 4 This is a detailed exploded schematic diagram of the rotatable and detachable connection anti-loosening sealing structure of Example 1;

[0029] Figure 5 2. It is a cross-sectional view of the rotationally detachable connection anti-loosening sealing structure of Example 1 (loose state);

[0030] Figure 61 is a cross-sectional view of the rotary detachable connection anti-loosening sealing structure (compressed state);

[0031] Figure 7 is a cross-sectional view of a pre-filter according to embodiment 1 of the present invention;

[0032] Figure 8 2 is a cross-sectional view of a pre-filter according to Example 1 of the present invention (wherein E indicates that the water inlet and outlet are both closed, F indicates that no compression is formed and no seal is formed, and G indicates that the threads are loosened);

[0033] Figure 9 is another structural diagram of embodiment 1 of the present invention;

[0034] Figure 10 yes Figure 9 A partial cross-sectional view of

[0035] Figure 11 yes Figure 9 A partial cross-sectional view of

[0036] Figure 12 This is a detailed exploded schematic diagram of the rotatable and detachable connection anti-loosening sealing structure of Example 2;

[0037] Figure 13 is a schematic structural diagram of Example 3;

[0038] In the figure: 1. Head assembly, 2. Driving part, 21. External driving part, 22. Assembly part, 23. Internal driving part, 23a. Upper driving part, 23b. Internal driving shaft, 23c. Lower driving part, 3. Adjusting part, 4. Bump, 5. Driving wrench, 6. Slide rail, a. Main body docking part, b. Elastic reset part, c. Water inlet channel, d. Central water outlet cavity, e. Water outlet channel, f. Sealing element. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0040] Example 1:

[0041] like Figure 1-11As shown, a pre-filter with water-cutting and pressure-relieving function and easy disassembly comprises a head body 1, a filter bottle and a filtering mechanism arranged on the filter bottle. The head body 1 is provided with a water inlet port, a water outlet port and an assembly cavity, and further comprises a main body docking member a and an adjustment component. The main body docking member a is fixed to the assembly port of the filter bottle and is connected to the head body through a rotating detachable connection structure. The adjustment component comprises a driving member 2 and an adjusting member 3. The driving member 2 is circumferentially connected to the head body 1 (such as being connected by a threaded rotation, and relative axial fixation can also be achieved). The adjusting member The joint part 3 is axially slidably connected to the machine head body 1, and a conversion fitting portion or conversion structure is further provided between the driving member 2 and the adjusting member 3. Under the action of an external force, the driving member 2 can rotate circumferentially relative to the machine head body 1, and through the conversion fitting portion or conversion structure, the adjusting member 3 is driven to slide axially, thereby achieving the squeezing and releasing of the rotating detachable connection structure; the driving member 2 is also provided with a flow channel switching structure, including a water inlet flow channel c, a central water outlet cavity d, a water outlet flow channel e and a sealing element f. When the driving member 2 rotates, the water inlet port and the water outlet port can be disconnected. The sealing element is arranged along the circumference of the water inlet flow channel c and the water outlet flow channel e, and the water inlet flow channel c and the water outlet flow channel e are provided with an assembly groove for accommodating the sealing element f or an assembly protrusion for sleeved with the sealing element f.

[0042] The pre-filter of the present invention has the function of water-cutting and pressure-relieving and is easy to disassemble. Its basic structure is based on the machine head assembly, which corresponds to the machine head structure of the prior art. The machine head assembly is provided with a rotatable driving member. By rotating, the adjusting member is driven to slide axially, that is, the rotating detachable connection structure is squeezed by extrusion. After the squeezing is released, the seal is disengaged, and the rotating detachable connection structure is loosened, which is convenient for receiving and disassembling the filter bottle. It replaces the threaded connection between the machine head and the filter bottle of the prior art. The threaded connection requires a large external force and a large space for disassembly. However, the present invention does not require this. The rotation of the driving member can be achieved by using a special-shaped wrench or a similar simple result that can drive the driving member to rotate. Through the design of the sealing structure and the flow channel switching structure, water-cutting and pressure-relieving, easy disassembly, and outflow of water from the waterproof pipe are achieved.

[0043] Specific to the embodiment, the filter bottle bottom is provided with a pollution discharge structure, and the filter mechanism and the filter bottle are provided with an elastic reset member. When the driving adjustment member 3 axially slides to extrude the rotating detachable connection structure, the elastic reset member is compressed, and the filter mechanism is placed in the filter bottle. When the driving adjustment member 3 axially slides to release the extrusion of the rotating detachable connection structure, the elastic reset member resets, and the filter mechanism is lifted out of the filter bottle. The pollution discharge structure comprises a pollution discharge connecting piece and a pollution discharge valve. The pollution discharge connecting piece is in sealing connection with the pollution discharge port of the filter bottle bottom. The pollution discharge valve is arranged at the outlet end of the pollution discharge connecting piece. The head main body 1 is provided with an isolation bushing capable of isolating the head main body 1 from water. The isolation bushing is made of inert material or at least has an inert material coating on the surface in contact with water. The inert material is selected from any one of rubber, plastic and ceramic. The filter bottle is further provided with a waterproof hammer structure.

[0044] Specific to the embodiment, the sealing structure b is extruded and released by the adjustment member 3 when the adjustment member 3 axially slides.

[0045] Specific to the embodiment, the sealing structure b is an annular sealing ring. The lower end surface of the adjustment member 3 constitutes a driving surface. The driving surface can abut against and release the abutment against the annular sealing ring, thereby realizing extrusion and release of extrusion.

[0046] More specifically, the driving surface is provided with a horizontal driving part and an inclined guide part c. The included angle between the planes where the driving part and the guide part c are located is an obtuse angle. The inclined guide part c is designed to leave a space for the elastic deformation of the sealing structure and increase the sealing area to improve the sealing effect.

[0047] Specific to the embodiment, the assembly cavity is provided with a driving port. The outer wall of the adjustment member 3 is in axial sliding connection with the inner wall of the assembly cavity. The driving member 2 is provided with a central water outlet channel and a channel port matched with the water outlet port. The driving end of the driving member 2 is arranged at the driving port.

[0048] More specifically, the assembly cavity is divided into a first assembly cavity and a second assembly cavity from top to bottom. The driving member 2 comprises an outer driving part 21, an assembly part 22 and an inner driving part 23. The driving member 2 is connected with the first assembly cavity through the assembly part 22. The adjustment member 3 comprises an assembly end and a movable end. The assembly end is connected with the inner driving part 23. The movable end is in axial sliding connection with the second assembly cavity. The movable end realizes extrusion and release of extrusion of the rotating detachable connection structure.

[0049] In this embodiment, the adjusting member 3 is a disc-type adjusting member, and the assembly end is arranged on the upper side of the disc-type adjusting member. The assembly end is circumferentially provided with at least one group of first sliding parts with an inclined angle, and the internal driving part 23 is provided with an adaptive second sliding part. The first sliding part and the second sliding part 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.

[0050] In this embodiment, the internal driving part 23 is composed of an upper driving part 23a, an internal driving shaft 23b and a lower driving part 23c. The internal driving shaft 23b is adapted to the assembly end of the adjusting member 3. The upper driving part 23a and the lower driving part 23c are both provided with a protrusion 4. The adjusting member 3 is provided with a slide rail 6. The protrusions 4 of the upper driving part 23a and the lower driving part 23c clamp the slide rail 6 of the adjusting member 3 toward each other.

[0051] In this embodiment, the movable ends of the adjusting members 3 are each provided with a sealing element, and the sealing element is made of an inert sealing material.

[0052] In this embodiment, the main docking member a and the filter bottle are integrally formed, or are split and sealed and fixed by a detachable structure. The driving end of the driving member 2 is adapted to the driving port, and a driving wrench 5 is fixed to the driving end.

[0053] In this embodiment, a positioning structure is provided between the adjusting member 3 and the circumference of the assembly cavity.

[0054] In this embodiment, the positioning structure is a matching structure of a sliding groove and a slider or a matching structure of a shaft and a hole.

[0055] Example 2

[0056] like Figure 12 As shown, the basic structure is the same as that of Example 1, except that: in this embodiment, the adjusting member 3 is a disc-type adjusting member, the assembly end is arranged on the upper side of the disc-type adjusting member, the assembly end is provided with a thread, and the inner driving part 23 is provided with an adaptive thread. The thread combination forms a conversion fitting part, which converts the circumferential rotation of the driving member 2 into the axial sliding of the adjusting member 3.

[0057] Example 3

[0058] like Figure 13 As shown, the basic structure is the same as that of Example 1, except that: a rotatable and detachable connection structure is provided between the main body docking part a and the head body, a plurality of discontinuous card slots are provided circumferentially of the head body, and a plurality of adaptive discontinuous card strips are provided on the inner side of the main body docking part a. Through the cooperation of the card strips and the card slots, a rotatable and detachable connection is achieved. Under the action of external force, the driving part 2 can rotate circumferentially relative to the head body 1, and through the conversion matching part or conversion structure, the adjusting part 3 is driven to slide axially, thereby realizing the extrusion and release of the card strip and card slot matching structure.

[0059] The pre-filter of the present invention, which has water-cutting and pressure-relieving functions and is easy to disassemble, has been optimized to effectively prevent the connection structure from loosening. Furthermore, compared to the traditional threaded connection method, the gap between the connection structures is movable, facilitating the removal of the filter bottle and the outflow of water from the waterproof pipe. The pre-filter, which has water-cutting and pressure-relieving functions and is easy to disassemble, has achieved good results through structural optimization and experimental simulation. It can effectively prevent the loosening of the connection structure and the outflow of water from the waterproof pipe, thereby improving the service life and reliability of the pre-filter.

[0060] The embodiment described above is only a preferred solution of the present invention and does not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solution described in the claims.

Claims

1. A pre-filter with water-cutting and pressure-relieving function and easy disassembly, comprising a head body (1), a filter bottle, and a filtering mechanism provided on the filter bottle, wherein the head body (1) is provided with a water inlet port, a water outlet port, and an assembly cavity, and is characterized in that: The main body docking member (a) and the adjusting assembly are also included. The main body docking member (a) is fixed to the assembly port of the filter bottle and is connected to the head body (1) through a rotating detachable connection structure. The adjusting assembly includes a driving member (2) and an adjusting member (3). The driving member (2) is connected to the head body (1) in a circumferential rotational manner, and the adjusting member (3) is connected to the head body (1) in an axial sliding manner. A conversion matching portion or conversion structure is also provided between the driving member (2) and the adjusting member (3). Under the action of an external force, the driving member (2) can be relatively moved relative to the head. The main body (1) rotates circumferentially, and drives the adjusting member (3) to slide axially through the conversion matching portion or the conversion structure, thereby achieving the squeezing and releasing of the rotating detachable connection structure; it also includes a sealing structure, and the adjusting member (3) can achieve the squeezing and releasing of the sealing structure when it slides axially; the driving member (2) is also provided with a flow channel switching structure, including a water inlet flow channel (c), a central water outlet cavity (d), a water outlet flow channel (e) and a sealing element (f); when the driving member (2) rotates, the water inlet port and the water outlet port can be disconnected.

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

3. The pre-filter with water cut-off 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 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 in the filter bottle; when the drive adjustment member (3) slides axially to release the squeezing of the rotatable detachable connection structure, the elastic reset member is reset, and the filter mechanism is lifted out of the filter bottle.

4. The pre-filter with water cut-off pressure relief and easy disassembly according to claim 5, characterized in that: The sewage discharge structure includes a sewage discharge connector and a sewage discharge valve. The sewage discharge connector is sealed with the sewage discharge port at the bottom of the filter bottle, and the sewage discharge valve is arranged at the outlet end of the sewage discharge connector.

5. A pre-filter with water cut-off 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 surface of the adjusting member (3) constitutes a driving surface, which can abut and release the abutment with the annular sealing ring, thereby achieving extrusion and release of extrusion.

6. The pre-filter with water cut-off pressure relief and easy disassembly according to claim 5, characterized in that: The driving surface is provided with a horizontal driving portion and an inclined guiding portion, and the angle between the planes where the driving portion and the guiding portion are located is an obtuse angle.

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

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

9. The pre-filter with water cut-off pressure relief and easy disassembly according to claim 8, characterized in that: The rotating 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 member (2) includes an external driving portion (21), an assembly portion (22) and an internal driving portion (23). The driving member (2) is connected to the first assembly cavity through the assembly portion (22). The adjusting member (3) includes an assembly end and a movable end. The adjusting member is connected to the internal driving portion (23) through the assembly end. The axial sliding connection is achieved through the cooperation of the movable end with the second assembly cavity. The screw connection structure is squeezed and released through the movable end.

10. The pre-filter with water cut-off pressure relief and easy disassembly according to claim 9, characterized in that: The adjusting member (3) is a disc-type adjusting member, and the assembly end is arranged on the upper side of the disc-type adjusting member. The assembly end is circumferentially provided with at least one group of first sliding parts with an inclined angle, and the inner driving part (23) is provided with an adapted second sliding part. The first sliding part and the second sliding part 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).

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

12. The pre-filter with water cut-off pressure relief and easy disassembly according to claim 10, characterized in that: The adjusting member (3) is a disc-type adjusting member, and the assembly end is arranged on the upper side of the disc-type adjusting member. The assembly end is provided with a thread, and the inner driving part (23) is provided with an adapted thread. The thread combination forms a conversion matching part, which converts the circumferential rotation of the driving member (2) into the axial sliding of the adjusting member (3).

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

14. A pre-filter with water cut-off pressure relief and easy disassembly according to any one of claims 1, 2, 3 or 4, characterized in that: The main body docking member (a) and the filter bottle are integrally formed, or are sealed and fixed via a detachable structure after being formed in a split manner. A positioning structure is provided between the regulating member (3) and the circumference of the assembly cavity.

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

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