A valve front filter assembly

Abstract

The application discloses a valve front-end filter assembly and relates to the technical field of valve front filtration. The valve front-end filter assembly comprises a mounting pipe, two connecting pipes which are symmetrically connected to the two ends of the mounting pipe in a rotating mode, a water inlet pipe and a valve front pipe which are respectively arranged at the other ends of the two connecting pipes, flanges which are arranged between the connecting pipes and the water inlet pipe and between the connecting pipes and the valve front pipe, a filtering mechanism and a mounting mechanism. When blockage occurs in the lower filtering bin, the mounting pipe can be rotated to drive the two filtering bins to exchange positions, the filtering bin at the lower position is automatically opened for use, the filtering bin at the upper position and the water outlet pipe are automatically closed, liquid is prevented from entering, the fixing of the mounting seat is automatically released, the mounting seat can be rotated to open the filtering bin at the upper position, the filtering cylinder can be replaced, the filtering cylinder can be conveniently replaced, and the use of the valve is not affected by manual cutting of the two ends of the filtering cylinder.

Description

Technical Field

[0001] This invention relates to the field of pre-valve filtration technology, specifically a valve pre-filter assembly. Background Technology

[0002] Valves, as key control components in fluid transport systems, are widely used in various pipelines, undertaking important functions such as shut-off, regulation, flow guidance, backflow prevention, and pressure stabilization. To ensure the normal operation of valves and downstream equipment, a front-end filter assembly is usually installed at the valve inlet to intercept mechanical impurities such as rust, sand, and welding slag in the medium, preventing them from entering the valve body and causing damage to the sealing surface, valve core jamming, or flow channel blockage, thereby ensuring the long-term stable operation of the system.

[0003] Currently, most common valve pre-filters are single-chamber structures with removable filter cartridges. During normal use, impurities gradually accumulate on the surface of the filter cartridge, leading to increased filtration resistance and reduced flow capacity, requiring regular cleaning or replacement of the filter cartridge. However, existing filtration systems have significant shortcomings in maintenance: replacing the filter cartridge requires first shutting down the pipeline section containing the filter, i.e., closing upstream or downstream valves, and sometimes even shutting down and depressurizing the entire pipeline system. Only after this can the filter housing be disassembled to remove the old filter cartridge and install the new one. This process is not only cumbersome and time-consuming but also directly interrupts pipeline operations, affecting the normal operation of downstream valves, which is particularly detrimental to continuous production systems that cannot be shut down. Furthermore, frequent start-ups, shutdowns, and disassemblies can increase the risk of leakage at pipeline connections, reducing the overall reliability and safety of the system.

[0004] To address the aforementioned issues, some existing technologies attempt to achieve non-stop maintenance by setting up bypass pipelines or parallel dual-filter systems. However, such solutions are typically complex in structure, occupy a large space, and have high modification costs. Furthermore, switching operations still rely on manual judgment and manual valve opening and closing, which cannot effectively avoid safety hazards caused by operational errors. Therefore, how to achieve rapid and safe replacement of filter cartridges without interrupting pipelines or affecting the normal operation of valves has become a pressing technical challenge in this field.

[0005] To address the shortcomings of the prior art, this invention provides a valve front-end filter assembly. Through a unique dual-filter chamber rotation switching structure and linkage control mechanism, it can immediately switch to the backup filter chamber after the filter cartridge becomes clogged, and automatically isolate the section to be maintained and unlock it. This enables rapid filter cartridge replacement without shutting down the system, significantly improving maintenance convenience and system operation continuity, and effectively overcoming the defects of the prior art. Summary of the Invention

[0006] The purpose of this invention is to provide a valve front-end filter assembly for facilitating the replacement of the filter cartridge.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a valve front-end filter assembly, comprising an installation pipe, with connecting pipes symmetrically and rotatably connected to both ends of the installation pipe, and an inlet pipe and a valve front pipe respectively provided at the other ends of the two connecting pipes. The connecting pipes are connected to the inlet pipes and to the valve front pipes via flanges. The installation pipe filters water through a filtration mechanism. The filtration mechanism includes a filter chamber, which is symmetrically and fixedly connected to the outer wall of the installation pipe. One end of an outlet pipe is fixedly connected to the outer wall of the filter chamber, and the other end of the outlet pipe is connected to the installation pipe. A filter cylinder is installed inside the filter chamber. The filter cylinder is installed inside the filter chamber via the installation mechanism.

[0008] As a further embodiment of the present invention: the filtration mechanism further includes a fixing frame, which is fixedly connected to one end of the connecting pipe. A circular plate is fixedly connected between the two fixing frames. The circular plate is rotatably connected to the middle position of the inner wall of the mounting pipe. Semicircular grooves are symmetrically formed at both ends of the circular plate, and an arc-shaped groove is formed at the top of the semicircular groove. The semicircular groove and the arc-shaped groove together form an annular guide groove. The inner walls of the filter chamber and the water outlet pipe are both fixedly connected to a support ring and a fixing ring. The fixing ring is located on the side of the support ring closer to the mounting pipe. A limit rod is symmetrically fixedly connected between the support ring and the fixing ring. A connecting plate is slidably connected to the outer wall of the limit rod. A baffle is fixedly connected between the two connecting plates. A guide frame is fixedly connected to the outer wall of the baffle. One end of the guide frame is slidably connected to the inner wall of the semicircular groove and the arc-shaped groove.

[0009] As a further embodiment of the present invention: the installation mechanism includes a mounting base, which is disposed above the filter chamber. A handle is fixedly connected to the top end of the mounting base, and an installation cylinder is fixedly connected to the bottom end of the mounting base. The filter cylinder is slidably connected to the inner wall of the installation cylinder. An installation groove is formed at the top end of the filter chamber, and an annular groove is formed on the outer wall of the installation cylinder. A displacement frame is slidably connected inside the filter chamber, with one end of the displacement frame extending below the connecting plate. A second spring is connected between the displacement frame and the filter chamber. A T-shaped block is slidably connected inside the filter chamber on one side of the installation groove, with one end of the T-shaped block extending into the inner cavity of the installation groove. A groove is formed on the outer wall of the displacement frame on one side of the T-shaped block.

[0010] As a further embodiment of the present invention: the outer wall of one end of the guide frame is in contact with the inner walls of the semi-circular groove and the arc-shaped groove.

[0011] As a further embodiment of the present invention: a limiting hole is formed on the outer wall of the connecting plate, and the inner wall of the limiting hole is in contact with the outer wall of the limiting rod.

[0012] As a further embodiment of the present invention: the outer wall of the filter cylinder is fitted with the inner wall of the mounting cylinder, the outer wall of the mounting cylinder is provided with an external thread, the inner wall of the mounting groove is provided with an internal thread, and the external thread matches the internal thread.

[0013] As a further embodiment of the present invention: the outer wall of one end of the T-shaped block is in contact with the inner wall of the annular groove, and a semi-circular surface is provided at one end of the T-shaped block located in the inner cavity of the mounting groove.

[0014] As a further embodiment of the present invention, the inner walls at both the upper and lower ends of the groove are provided with inclined surfaces.

[0015] As a further embodiment of the present invention, the mounting pipe and the connecting pipe are rotated and sealed together.

[0016] As a further embodiment of the present invention: both ends of the mounting tube are symmetrically fixedly connected with positioning plates, the outer wall of the positioning plate is provided with a fixing groove, the top end of the connecting tube is fixedly connected with a positioning seat, the inside of the positioning seat is slidably connected with a fixing block extending out of the positioning seat, and a first spring is connected between the fixing block and the positioning seat; the inner wall of the fixing groove is in contact with the outer wall of one end of the fixing block, and the inner wall of the positioning seat is in contact with the outer wall of the fixing block.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. Enables rapid filter cartridge replacement without shutting down the system, ensuring continuous system operation; This invention features two symmetrically arranged filter chambers with a rotatable mounting pipe structure. When the lower filter chamber becomes clogged, simply rotating the mounting pipe allows the two filter chambers to exchange positions. The previously reserved upper filter chamber automatically moves to the lower working position and begins filtration. The entire process does not require interrupting the pipeline or stopping the machine to release pressure, effectively avoiding the drawback of traditional filtration devices that require interrupting pipeline transport when replacing filter cartridges. This ensures the continuous normal operation of downstream valves and is particularly suitable for continuous production conditions where shutdown is not possible.

[0018] 2. The filter chamber switching and flow channel opening / closing are linked, achieving a high degree of automation. In this invention, both the filter chamber and the outlet pipe are equipped with baffle structures driven by guide frames. The guide frames slide in conjunction with the semi-circular grooves and arc-shaped grooves on the circular plate. When the installation pipe rotates, causing the filter chambers to exchange positions, the baffles in the upper filter chamber and its outlet pipe automatically close the corresponding flow channels to prevent liquid from entering the section to be maintained; the baffles in the lower filter chamber and its outlet pipe automatically open the flow channels to ensure that the liquid passes smoothly through the filter cartridge. This linkage control mechanism realizes the synchronous automatic execution of the switching process and the flow channel opening / closing, eliminating the need for manual valve operation, simplifying the operation process, and reducing the risk of human error.

[0019] 3. Automatic unlocking during filter cartridge replacement ensures convenient and efficient maintenance. In this invention, the mounting mechanism and the baffle displacement structure are linked. When a filter compartment rotates to the upper position (to be maintained), its internal connecting plate moves with the baffle and pushes the displacement frame, thereby causing the T-shaped block to exit from the annular groove, automatically releasing the lock on the mounting seat. Maintenance personnel can directly turn the handle to open the mounting seat and replace the filter cartridge without the need for special tools or additional unlocking operations. After replacement, when the filter compartment rotates back to the lower working position, the displacement frame resets under the action of the spring and pushes the T-shaped block back into the annular groove, achieving automatic locking of the mounting seat. This prevents loosening during use or leakage due to misoperation, balancing ease of operation and safety.

[0020] 4. Compact structure, low modification cost, and strong applicability: The functional components of this invention are integrated into an overall structure consisting of an installation pipe, a filter chamber, and a connecting pipe. There is no need for external bypass pipes or complex electronic control actuators. The overall structure is compact and reasonable, occupies little space, and can directly replace the existing filter assembly with a single filter chamber structure. It requires little modification to the original piping system and has good versatility and prospects for widespread application. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the installation tube of the present invention; Figure 3 This is a schematic diagram of the internal structure of the mounting tube of the present invention; Figure 4 This is a schematic diagram of the connection structure between the fixing frame and the connecting pipe of the present invention; Figure 5 This is a schematic diagram of the internal structure of the filter chamber and the water outlet pipe of the present invention; Figure 6 This is a schematic diagram of the circular plate of the present invention; Figure 7 This is a schematic diagram of the installation of the filter cartridge of the present invention; Figure 8 This is a schematic diagram showing the disassembled structure of the mounting base and filter cylinder of the present invention; Figure 9 This is a schematic diagram of the installation of the displacement frame of the present invention; Figure 10 This is a schematic diagram of the T-shaped block and groove of the present invention.

[0022] In the diagram: 1. Installation pipe; 2. Connecting pipe; 3. Inlet pipe; 4. Valve front pipe; 5. Flange; 6. Filtering mechanism; 601. Filter chamber; 602. Outlet pipe; 603. Filter cylinder; 604. Positioning plate; 605. Fixing groove; 606. Positioning seat; 607. Fixing block; 608. First spring; 609. Fixing frame; 610. Circular plate; 611. Support ring; 612. Fixing ring; 613. Limiting rod; 614. Connecting plate; 615. Baffle; 616. Guide frame; 617. Semicircular groove; 618. Arc groove; 7. Installation mechanism; 701. Mounting seat; 702. Handle; 703. Mounting cylinder; 704. Mounting groove; 705. Annular groove; 706. Displacement frame; 707. Second spring; 708. T-block; 709. Groove. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0025] Please see Figures 1 to 10 In this embodiment of the invention, a valve front-end filter assembly includes an installation pipe 1, with connecting pipes 2 symmetrically rotatably connected to both ends of the installation pipe 1. The other ends of the two connecting pipes 2 are respectively provided with an inlet pipe 3 and a valve front pipe 4. The connecting pipe 2 and the inlet pipe 3 and the connecting pipe 2 and the valve front pipe 4 are connected by flanges 5. The installation pipe 1 performs water filtration operation through a filtration mechanism 6.

[0026] In this embodiment: the liquid enters the installation pipe 1 through the water inlet pipe 3, is filtered by the components in the filter mechanism 6, and then flows to the valve position through the valve front pipe 4.

[0027] Please refer to this carefully. Figures 2 to 6 The filtration mechanism 6 includes a filter chamber 601, which is symmetrically and fixedly connected to the outer wall of the mounting pipe 1. A water outlet pipe 602 is fixedly connected to the outer wall of the filter chamber 601, with one end of the outlet pipe 602 connected to the mounting pipe 1. A filter cylinder 603 is installed inside the filter chamber 601. Positioning plates 604 are symmetrically and fixedly connected to both ends of the mounting pipe 1. A fixing groove 605 is provided on the outer wall of the positioning plate 604. A positioning seat 606 is fixedly connected to the top end of the connecting pipe 2. A fixing block 607 extending from the positioning seat 606 is slidably connected inside the positioning seat 606. A first spring 608 connects the fixing block 607 and the positioning seat 606. The filter cylinder 603 is installed inside the filter chamber 601 via the mounting mechanism 7. The filtration mechanism 6 also includes a fixing frame 609, which is fixedly connected to one end of the connecting pipe 2. Two fixing frames 609... A circular plate 610 is fixedly connected between the two pipes 9. The circular plate 610 is rotatably connected to the middle position of the inner wall of the installation pipe 1. Semicircular grooves 617 are symmetrically opened at both ends of the circular plate 610. An arc groove 618 is opened at the top of the semicircular groove 617. The semicircular groove 617 and the arc groove 618 form an annular guide groove. The inner walls of the filter chamber 601 and the water outlet pipe 602 are fixedly connected to a support ring 611 and a fixing ring 612. The fixing ring 612 is located on the side of the support ring 611 closer to the installation pipe 1. A limit rod 613 is symmetrically fixedly connected between the support ring 611 and the fixing ring 612. A connecting plate 614 is slidably connected to the outer wall of the limit rod 613. A baffle 615 is fixedly connected between the two connecting plates 614. A guide frame 616 is fixedly connected to the outer wall of the baffle 615. One end of the guide frame 616 is slidably connected to the inner wall of the semicircular groove 617 and the arc groove 618.

[0028] In this embodiment: the circular plate 610 cuts off the inner cavity of the mounting pipe 1, so that the liquid flows into the filter chamber 601 below. After the filter cylinder 603 filters the liquid, the liquid flows into the mounting pipe 1 again through the water outlet pipe 602, and then into the valve front pipe 4 through the connecting pipe 2. Impurities remain on the filter cylinder 603.

[0029] When the filter cartridge 603 needs to be replaced, the fixing block 607 is pushed to move, compressing the first spring 608. The fixing block 607 moves out of the fixing groove 605, releasing the fixation between the mounting tube 1 and the connecting tube 2. The mounting tube 1 is rotated, causing the two filter chambers 601 to exchange positions. Then, the fixing block 607 is released, and the fixing block 607 is displaced by the elastic force of the first spring 608, inserting into the fixing groove 605 to fix the mounting tube 1 and the connecting tube 2. During the rotation of the mounting tube 1, the guide frame 616 slides in the arc groove 618 and the semi-circular groove 617. In the annular guide groove formed by the 18 enclosures, the curvature of the arc-shaped groove 618 is significantly smaller than that of the semi-circular groove 617. Therefore, during this process, the upper guide frame 616 rotates to move the baffle 615 towards the fixed ring 612 until the upper baffle 615 completely seals the through hole on the fixed ring 612, thus blocking the upward flow of liquid. Correspondingly, the lower guide frame 616 rotates to move the lower baffle 615 away from the lower fixed ring 612 until the lower baffle 615 no longer blocks the through hole on the lower fixed ring 612, allowing the liquid to flow smoothly downwards and be filtered by the lower filter cartridge 603. The liquid always passes through from below for continued filtration, which also makes full use of the water's own gravity potential energy, making the filtration operation smoother.

[0030] Please refer to this carefully. Figures 7 to 9 The installation mechanism 7 includes a mounting base 701, which is located above the filter chamber 601. A handle 702 is fixedly connected to the top of the mounting base 701, and an installation cylinder 703 is fixedly connected to the bottom of the mounting base 701. The filter cylinder 603 is slidably connected to the inner wall of the installation cylinder 703. An installation groove 704 is provided at the top of the filter chamber 601, and an annular groove 705 is provided on the outer wall of the installation cylinder 703. A displacement frame 706 is slidably connected inside the filter chamber 601. One end of the displacement frame 706 extends to the bottom of the connecting plate 614. A second spring 707 is connected between the displacement frame 706 and the filter chamber 601. A T-shaped block 708 is slidably connected inside the filter chamber 601 on one side of the installation groove 704. One end of the T-shaped block 708 extends into the inner cavity of the installation groove 704. A groove 709 is provided on the outer wall of the displacement frame 706 on one side of the T-shaped block 708.

[0031] In this embodiment: the baffle 615 inside the upper filter chamber 601 is in contact with the fixing ring 612, the connecting plate 614 is displaced and contacts the displacement frame 706, pushing the displacement frame 706 to move, causing the T-shaped block 708 to be squeezed, so that the groove 709 moves to one side of the T-shaped block 708, and the T-shaped block 708 can slide into the groove 709. Rotating the handle 702 drives the mounting base 701 to rotate, and the rotation of the mounting base 701 drives the mounting cylinder 703 to rotate. The mounting cylinder 703 rotates and moves out of the mounting groove 704, so that the filter cylinder 603 can be replaced. The new filter cylinder 603 is placed into the mounting cylinder 703, and then the mounting cylinder 703 is threaded into the mounting groove 704. The filter cylinder 603 is connected to the support ring 611 inside the filter chamber 601. When the upper filter chamber 601 is rotated to the lower position, the baffle 615 displaces and separates from the fixing ring 612. At this time, the displacement frame 706 is displaced by the elastic force of the second spring 707. The displacement of the displacement frame 706 causes the T-shaped block 708 to slide along one side of the inner wall of the groove 709, pushing the T-shaped block 708 to move. One end of the T-shaped block 708 engages in the annular groove 705. Then, the outer wall of the displacement frame 706 contacts the T-shaped block 708, so that the T-shaped block 708 cannot move out of the annular groove 705. This reinforces the mounting base 701 to prevent the filter cartridge 603 from loosening during use or to prevent accidental leakage caused by workers accidentally opening the lower mounting base 701 which is in the process of filtration.

[0032] By incorporating two filter chambers 601, when the lower filter chamber 601 becomes clogged, the mounting pipe 1 can be rotated to exchange the positions of the two filter chambers 601. The lower filter chamber 601 automatically opens for use, while the upper filter chamber 601 and the outlet pipe 602 automatically close to prevent liquid from entering. Simultaneously, the mounting base 701 is automatically released, allowing the upper filter chamber 601 to be opened by rotating the mounting base 701, facilitating the replacement of the filter cartridge 603. This design facilitates the replacement of the filter cartridge 603 without requiring manual cutting off of the filter section at both ends, thus avoiding interference with valve operation.

[0033] Please refer to this carefully. Figures 2 to 6 The inner wall of the fixing groove 605 is in contact with the outer wall of one end of the fixing block 607, and the inner wall of the positioning seat 606 is in contact with the outer wall of the fixing block 607.

[0034] In this embodiment: the fixed block 607 is pushed to move, which compresses the first spring 608. The fixed block 607 moves out of the fixed groove 605, and the fixation between the installation tube 1 and the connecting tube 2 is released. The installation tube 1 is rotated so that the two filter chambers 601 exchange positions. Then the fixed block 607 is released. The fixed block 607 is displaced by the elastic force of the first spring 608 and inserts into the fixed groove 605 to fix the installation tube 1 and the connecting tube 2.

[0035] Please refer to this carefully. Figures 2 to 6 One end of the guide frame 616 is in contact with the inner wall of the semi-circular groove 617 and the arc-shaped groove 618.

[0036] In this embodiment: when the mounting tube 1 rotates, the circular plate 610 rotates relative to the mounting tube 1, and at this time the guide frame 616 slides in the arc groove 618 and the semi-circular groove 617.

[0037] Please refer to this carefully. Figures 2 to 6 The outer wall of the connecting plate 614 has a limiting hole, and the inner wall of the limiting hole fits against the outer wall of the limiting rod 613.

[0038] In this embodiment: the guide frame 616 is displaced, causing the baffle 615 to move, and the connecting plate 614 slides along the limiting rod 613. The limiting rod 613 slides within the limiting hole, limiting the movement direction of the baffle 615.

[0039] Please refer to this carefully. Figures 7 to 9 The outer wall of the filter cylinder 603 fits against the inner wall of the mounting cylinder 703. The outer wall of the mounting cylinder 703 is provided with an external thread, and the inner wall of the mounting groove 704 is provided with an internal thread. The external thread matches the internal thread.

[0040] In this embodiment: a new filter cartridge 603 is placed into the mounting cylinder 703, and then the mounting cylinder 703 is threaded into the mounting groove 704. The filter cartridge 603 contacts the support ring 611, thereby closing the opening of the filter chamber 601.

[0041] Please refer to this carefully. Figures 7 to 9 One end of the outer wall of the T-shaped block 708 fits against the inner wall of the annular groove 705, and a semi-circular surface is provided at one end of the T-shaped block 708 located in the inner cavity of the mounting groove 704.

[0042] In this embodiment: one end of the T-shaped block 708 engages with the annular groove 705, and then the outer wall of the displacement frame 706 comes into contact with the T-shaped block 708, thereby preventing the T-shaped block 708 from displacing out of the annular groove 705, thus reinforcing the mounting base 701 and preventing the filter cartridge 603 from loosening during use.

[0043] Please refer to this carefully. Figures 7 to 9The inner walls at both the upper and lower ends of the groove 709 are provided with inclined surfaces.

[0044] In this embodiment: the displacement frame 706 is displaced by the elastic force of the second spring 707. The displacement of the displacement frame 706 causes the T-shaped block 708 to slide along one side of the inner wall of the groove 709, thus pushing the T-shaped block 708 to move.

[0045] Please refer to this carefully. Figures 3 to 4 The mounting pipe 1 and the connecting pipe 2 are rotatably sealed together.

[0046] In this embodiment, the rotational sealing connection between the installation pipe 1 and the connecting pipe 2 can be achieved by a combination of bearings and sealing rings. Specifically, a ball bearing or sliding bearing is installed between the mating surfaces of the installation pipe 1 and the connecting pipe 2 to ensure flexible rotation, and an O-ring or skeleton oil seal is used to achieve radial sealing. Alternatively, a mechanical seal structure can be used, where a dynamic seal is formed by the end face of the rotating ring that rotates with the installation pipe 1 and the stationary ring fixed to the connecting pipe 2 under the action of a spring. A rotary joint can also be used to achieve the rotational sealing connection. The rotary joint is fixed to the connecting pipe 2 by its fixed part and to the installation pipe 1 by its rotating part, and achieves dynamic sealing by means of internal sealing components. The combination of bearings and sealing rings is preferred because it has a simple structure, is easy to assemble, and has reliable sealing, which can meet the requirements of repeated rotation of the installation pipe 1 during the filter chamber switching process.

[0047] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A valve front-end filter assembly, characterized in that, The system includes an installation pipe (1), with connecting pipes (2) symmetrically and rotatably connected to both ends of the installation pipe (1). The other ends of the two connecting pipes (2) are respectively provided with an inlet pipe (3) and a valve front pipe (4). The connecting pipes (2) and the inlet pipe (3) and the connecting pipes (2) and the valve front pipe (4) are connected by flanges (5). The installation pipe (1) filters water through a filter mechanism (6). The filter mechanism (6) includes two filter chambers (601). The two filter chambers (601) are symmetrically and fixedly connected to the outer wall of the installation pipe (1). One end of an outlet pipe (602) is fixedly connected to the outer wall of the filter chamber (601). The other end of the outlet pipe (602) is connected to the installation pipe (1). A filter cylinder (603) is installed in the inner cavity of the filter chamber (601). The filter cylinder (603) is installed in the filter chamber (601) through an installation mechanism (7). The filtration mechanism (6) further includes a fixing frame (609), which is fixedly connected to one end of the connecting pipe (2). A circular plate (610) is fixedly connected between the two fixing frames (609). The circular plate (610) is rotatably connected to the middle position of the inner wall of the mounting pipe (1). Semicircular grooves (617) are symmetrically opened at both ends of the circular plate (610), and an arc groove (618) is opened at the top of the semicircular groove (617). The semicircular groove (617) and the arc groove (618) form an annular guide groove. The filter chamber (601) and the water outlet pipe (602) The inner wall is fixedly connected with a support ring (611) and a fixing ring (612). The fixing ring (612) is located on the side of the support ring (611) close to the mounting tube (1). The support ring (611) and the fixing ring (612) are symmetrically fixedly connected with limit rods (613). The outer wall of the limit rod (613) is slidably connected with a connecting plate (614). The two connecting plates (614) are fixedly connected with a baffle (615). The outer wall of the baffle (615) is fixedly connected with a guide frame (616). One end of the guide frame (616) is slidably connected to the inner wall of the annular guide groove. The circular plate (610) cuts off the inner cavity of the mounting tube (1). When it is necessary to replace the lower filter cartridge (603), the mounting tube (1) is rotated so that the two filter chambers (601) exchange positions. During the rotation of the mounting tube (1), the guide frame (616) slides in the arc groove (618) and the semi-circular groove (617). Since the arc of the arc groove (618) is smaller than the arc of the semi-circular groove (617), the guide frame (616) that rotates to the upper position drives the baffle (615) during this process. Move towards the fixed ring (612) until the upper baffle (615) completely seals the through hole on the fixed ring (612), thus blocking the passage of the upward-flowing liquid; correspondingly, rotate the lower guide frame (616) to drive the lower baffle (615) to move away from the lower fixed ring (612) until the lower baffle (615) no longer blocks the through hole on the lower fixed ring (612), so that the liquid can flow smoothly downward and be filtered by the lower filter cylinder (603).

2. The valve front-end filter assembly according to claim 1, characterized in that, The installation mechanism (7) includes a mounting base (701), which is positioned above the filter chamber (601). A handle (702) is fixedly connected to the top of the mounting base (701), and an installation cylinder (703) is fixedly connected to the bottom of the mounting base (701). The filter cylinder (603) is slidably connected to the inner wall of the installation cylinder (703). An installation groove (704) is provided at the top of the filter chamber (601), and an annular groove (705) is provided on the outer wall of the installation cylinder (703). The inner wall of the filter chamber (601) is... A displacement frame (706) is slidably connected to the filter chamber (601). One end of the displacement frame (706) extends to the bottom of the connecting plate (614). A second spring (707) is connected between the displacement frame (706) and the filter chamber (601). A T-shaped block (708) is slidably connected to the inside of the filter chamber (601) on one side of the mounting groove (704). One end of the T-shaped block (708) extends into the inner cavity of the mounting groove (704). A groove (709) is provided on the outer wall of the displacement frame (706) on one side of the T-shaped block (708).

3. A valve front-end filter assembly according to claim 1, characterized in that, One end of the guide frame (616) is attached to the inner wall of the annular guide groove.

4. A valve front-end filter assembly according to claim 1, characterized in that, The outer wall of the connecting plate (614) has a limiting hole, and the inner wall of the limiting hole is in contact with the outer wall of the limiting rod (613).

5. A valve front-end filter assembly according to claim 2, characterized in that, The outer wall of the filter cylinder (603) is in contact with the inner wall of the mounting cylinder (703). The outer wall of the mounting cylinder (703) is provided with an external thread, and the inner wall of the mounting groove (704) is provided with an internal thread. The external thread matches the internal thread.

6. A valve front-end filter assembly according to claim 2, characterized in that, One end of the outer wall of the T-shaped block (708) is in contact with the inner wall of the annular groove (705), and a semi-circular surface is provided at one end of the T-shaped block (708) located in the inner cavity of the mounting groove (704).

7. A valve front-end filter assembly according to claim 2, characterized in that, The inner walls at both the upper and lower ends of the groove (709) are provided with inclined surfaces.

8. A valve front-end filter assembly according to claim 1, characterized in that, The mounting pipe (1) and the connecting pipe (2) are connected by a rotating seal.

9. A valve front-end filter assembly according to claim 1, characterized in that, Both ends of the mounting tube (1) are symmetrically fixedly connected with positioning plates (604). The outer wall of the positioning plate (604) is provided with a fixing groove (605). The top end of the connecting tube (2) is fixedly connected with a positioning seat (606). The inside of the positioning seat (606) is slidably connected with a fixing block (607) extending out of the positioning seat (606). A first spring (608) is connected between the fixing block (607) and the positioning seat (606). The inner wall of the fixing groove (605) is in contact with the outer wall of one end of the fixing block (607), and the inner wall of the positioning seat (606) is in contact with the outer wall of the fixing block (607).

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