A tap water pipe filtration device

Abstract

This utility model discloses a tap water pipeline filtration device, belonging to the field of municipal engineering technology. It includes a housing with a through-flow inlet and outlet channel. A filtration structure is installed in the housing to trap impurities in the fluid. One end of a flushing channel is connected to the inlet channel, and the other end extends to the outlet surface of the filtration structure. A flow guiding and switching mechanism is configured to switch between a first flow path and a second flow path. The first flow path connects the inlet channel to the outlet channel; the second flow path connects the flushing channel to the outlet channel. When the second flow path is open, the fluid in the flushing channel penetrates back through the outlet surface of the filtration structure, carrying away the impurities trapped upstream. This utility model uses a single-action stopcock valve to switch between filtration and backwashing modes. The acute-angle swirling flow achieves zero-blind-zone, highly efficient self-cleaning of the filter screen. Staged filtration and visible sewage discharge reduce the risk of clogging. The overall structure requires no external power source, extending its lifespan and making maintenance convenient.

Description

Technical Field

[0001] This utility model specifically relates to a water pipe filtration device, belonging to the field of municipal engineering technology. Background Technology

[0002] Tap water is the fundamental water source for urban residents' daily life and industrial production, and its water quality safety is directly related to public health and equipment operation safety. In municipal pipe networks and industrial fluid transportation systems, filtration devices play a crucial role in intercepting impurities such as suspended particles, rust, and silt, ensuring that the final water quality meets usage standards. Due to the complex composition of water sources and frequent fluctuations in pipe network pressure, filtration devices must possess continuous and efficient contaminant interception capabilities and shock resistance stability.

[0003] Traditional tap water pipe filtration devices generally suffer from low flushing efficiency and cumbersome operation. Their flushing process typically requires interrupting the normal water supply or relying on external systems, and often uses a forward flushing method aligned with the filtration direction. This makes it difficult for the water flow to effectively remove impurities adhering to the filter screen's inlet side, resulting in poor cleaning and easy clogging. Simultaneously, the flushing water pressure is often insufficient, and the filter screen structure design (such as flat filters) is not optimized for efficient flushing. The mechanism for switching between filtration and flushing modes can be complex, increasing the difficulty of user operation. Furthermore, the lack of a clear visual window for the sewage discharge status and an effective pre-filter unit makes the sewage discharge process uncontrollable, and large particles of impurities easily accelerate the clogging of the main filter screen. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing a tap water pipe filtration device, which achieves high flushing efficiency, simple operation, high cleaning efficiency, and is not prone to clogging and easy maintenance. The device includes a housing with a through-flow water inlet channel and a water outlet channel inside.

[0005] A filter structure is disposed in the housing and located between the water inlet channel and the water outlet channel, for intercepting impurities in the fluid;

[0006] The rinsing channel has one end connected to the water inlet channel and the other end extending to the water outlet surface side of the filter structure, with its outlet direction facing the filter surface of the filter structure.

[0007] The flow switching mechanism is configured to allow switching between a first flow path and a second flow path;

[0008] The first flow path is to connect the inlet channel to the outlet channel;

[0009] The second flow path is to connect the flushing channel to the water outlet channel;

[0010] When the second flow path is open, the fluid in the flushing channel penetrates out in the opposite direction from the water outlet surface side of the filter structure, and carries away the impurities intercepted on the upstream side.

[0011] Furthermore, the flow diversion switching mechanism includes:

[0012] The stopcock valve body is coaxially disposed at the inlet of the water outlet channel and can rotate around its axis.

[0013] An L-shaped guide hole is provided through the stopcock valve body. Its first port can be independently connected to the water inlet channel or the flushing channel by rotating the stopcock valve body, and its second port is connected to the water outlet channel.

[0014] Furthermore, the valve body is provided with a valve stem extending to the outside of the housing, and the end of the valve stem located on the outside of the housing is provided with an operating handle for operation by personnel to switch the flow path of the first port.

[0015] Furthermore, the flushing channel includes:

[0016] The main flushing pipe is connected to the water inlet channel;

[0017] An oblique jet pipe is connected to the main flushing pipe, and its outlet extends to the water outlet surface side of the filter structure, with the jet direction set at an acute angle to the filter surface.

[0018] A pressurization structure is installed inside the main flushing pipe to increase the fluid pressure inside the pipe.

[0019] Furthermore, the filtration structure is a filter screen, with its large opening facing the water inlet channel, and the axial direction of the oblique jet pipe is set at an acute angle to the generatrix of the inner wall of the filter screen.

[0020] Furthermore, a pre-filter unit is provided in the water inlet channel;

[0021] The pre-filter unit includes:

[0022] A cylindrical support with through holes around its circumference;

[0023] The interception net is coaxially sleeved on the outer surface of the cylindrical support.

[0024] Furthermore, the housing includes:

[0025] The top cover is provided with an inlet flange that connects to the water inlet channel;

[0026] The lower cover is provided with an outlet flange that connects to the water outlet channel;

[0027] A locking ring is rotatably fitted onto the connection between the upper cover and the lower cover.

[0028] Furthermore, the bottom of the housing is provided with an impurity collection chamber;

[0029] The drain port of the plug valve body is connected to the impurity collection chamber;

[0030] The bottom of the impurity collection chamber is equipped with a visual observation window and a drain valve.

[0031] Beneficial effects:

[0032] The single rotation of the stopcock valve body of the flow switching mechanism enables a leak-free and rapid switching between filtration and backwashing conditions.

[0033] The flushing channel, pressurized by hydrodynamics, combined with sharp-angle directional jetting, forms a full-coverage swirling shear force on the filter screen surface, effectively removing impurities while avoiding structural damage.

[0034] The geometrically coordinated design of the filter and the angled spray ensures zero cleaning blind spots;

[0035] The pre-filter unit and the impurity collection chamber form a graded filtration-sedimentation-visible sewage discharge system, which greatly reduces the load on the main filter and the risk of clogging.

[0036] The split housing, combined with the oblique thread locking ring, enables convenient maintenance and high sealing performance;

[0037] The overall structure significantly improves filtration efficiency, extends component life, reduces the frequency of manual maintenance, and optimizes the operation process without requiring external power. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of this utility model;

[0039] Figure 2 This is a schematic cross-sectional view of the structure of this utility model;

[0040] Figure 3 This is a schematic cross-sectional view of the plug valve body of this utility model;

[0041] Figure 4 This is a schematic diagram of the structure of the plug valve of this utility model;

[0042] Figure 5 This is a schematic diagram of the flow path switching of the plug valve of this utility model.

[0043] In the diagram: 1. Shell; 101. Inlet channel; 102. Outlet channel; 103. Top cover; 104. Inlet flange; 105. Bottom cover; 106. Outlet flange; 107. Locking ring; 108. Impurity collection chamber; 109. Visual observation window; 110. Drain valve; 2. Filter structure; 201. Filter screen; 3. Flushing channel; 301. Main flushing pipe; 302. Angled jet pipe; 303. Pressurization structure; 4. Flow guiding and switching mechanism; 401. First flow path; 402. Second flow path; 403. Plug valve body; 404. L-shaped guide hole; 405. First port; 406. Second port; 407. Valve stem; 408. Operating handle; 5. Pre-filter unit; 501. Cylindrical support; 502. Through hole; 503. Interception net. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] Please see Figure 1-5 As shown, a tap water pipe filtration device includes a housing 1. An inlet channel 101 and an outlet channel 102 are formed inside the housing 1, separated by a filter structure 2. The filter structure 2 is fixed between the outlet end of the inlet channel 101 and the inlet end of the outlet channel 102, with its filter surface facing the water inlet direction to trap fluid impurities. An impurity collection chamber 108 is integrated at the bottom of the housing 1, and the top is assembled by a split upper cover 103 and a lower cover 105. The upper cover 103 has an inlet flange 104 connecting to the pipe inlet, and the lower cover 105 has an outlet flange 106 connecting to the pipe outlet. The two are axially pressed and sealed by a locking ring 107.

[0046] A stopcock valve body 403 is coaxially mounted at the inlet of the outlet channel 102, with an internal L-shaped guide hole 404 penetrating the valve body. The first port 405 of the guide hole can be independently aligned with the outlet of the inlet channel 101 or the outlet of the flushing channel 3 by rotating the valve body, while the second port 406 remains in constant communication with the outlet channel 102. A valve stem 407 extends externally from the valve body, passing through a multi-layered sealed stuffing box and exiting the housing 1, with its end connected to an operating handle 408 with a limiting stop point. A transmission structure is provided between the valve stem 407 and the stopcock valve body 403. This transmission structure offsets the installation position of the valve stem 407 from the central axis of the outlet channel 102. This arrangement allows the operating handle 408 to be placed in a non-drainage path area on the side of the housing 1, preventing it from obstructing fluid discharge from the outlet channel 102. The flow switching mechanism 4 is used to switch the flow path; specifically, when the handle is rotated, the stopcock valve body 403 rotates synchronously.

[0047] First flow path 401 (filtration condition): First port 405 connects to water inlet channel 101, and fluid flows directly through L-shaped guide hole 404 to water outlet channel 102, where impurities are intercepted by filter structure 2.

[0048] Second flow path 402 (backwashing condition): First port 405 switches to flushing channel 3, and water inlet channel 101 is blocked; at this time, the pressurized fluid in flushing channel 3 is shot towards the water outlet surface of filter structure 2 through oblique jet pipe 302.

[0049] Flushing channel 3: The main flushing pipe 301 is connected to the water inlet channel 101, and the built-in Venturi-type pressurization structure 303 increases the fluid pressure; multiple oblique spray pipes 302 are evenly distributed around the circumference, and the outlet extends to the inner side of the small end of the filter screen 201. The spray direction is inclined at an acute angle to the inner wall of the filter screen 201 and points to the large end. A sealing structure is provided on the back side of the stopcock valve body 403. The sealing structure is set at 180 degrees with the first port 405 of the L-shaped guide hole 404. When the stopcock valve body 403 is rotated, the L-shaped guide hole 404 switches the flow path. At this time, the sealing structure closes and seals the corresponding flushing channel 3 or water inlet channel 101, thereby realizing the switching of the flow path.

[0050] Backwashing action: High-pressure water jets impact the surface of filter screen 201 at sharp angles, decomposing into vertical peeling force and parallel shearing force, forming a spiral vortex that covers the entire filter screen 201, peeling off impurities and entraining them to the drain port. The drain port is located between the outlet edge of the water inlet channel 101 and the large-mouth edge of the filter screen 201, formed by an annular gap between the two. An elastic sealing structure is provided between the outlet edge of the water inlet channel 101 and the large-mouth edge of the filter screen 201, achieving a seal under filtration conditions and allowing impurity fluid to flow through this gap to the drain port of the stopcock valve body 403 under backwashing conditions.

[0051] The fluid carrying impurities is discharged into the bottom impurity collection chamber 108 through the drain port of the plug valve body 403; the side wall of the chamber is provided with an inclined guide surface to allow the impurities to settle and collect, and the accumulation status is monitored through the visual observation window 109 at the bottom; after the drain valve 110 is opened, the impurities are completely discharged under the action of gravity.

[0052] As a technical optimization solution of this utility model, such as Figures 2 to 5As shown, the outer wall of the stopcock valve body 403 is fitted with the inner wall of the inlet of the outlet channel 102 with a clearance, and a sealing ring is provided between the two to prevent crossflow. When the stopcock valve body 403 is rotated, the first port 405 of the L-shaped guide hole 404 moves in a circular motion around the axis, sequentially aligning with the outlet of the inlet channel 101 or the outlet of the flushing channel 3. When the first port 405 is connected to the inlet channel 101, the fluid flows directly to the outlet channel 102 through the L-shaped guide hole 404 to achieve filtration. When the first port 405 is switched to connect to the flushing channel 3, the fluid in the inlet channel 101 is blocked, and the high-pressure fluid in the flushing channel 3 penetrates the filter structure 2 in the reverse direction and carries impurities out. The above structure accurately switches between the two flow paths through a single rotation action, and the sealing ring blocks the fluid interference of the non-conducting flow path, realizing the leak-free switching between filtration and flushing conditions, greatly improving the operational reliability and system sealing.

[0053] As a technical optimization solution of this utility model, such as Figures 1 to 5 As shown, a multi-layer sealing packing gland is installed where the valve stem 407 passes through the housing 1 to prevent fluid leakage. The operating handle 408 and the valve stem 407 are connected by a spline to ensure reliable torque transmission. When the operating handle 408 is rotated, the stopcock valve body 403 rotates synchronously, so that the first port 405 of the L-shaped guide hole 404 is alternately aligned with the water inlet channel 101 or the flushing channel 3. The handle rotation trajectory is set with limit points corresponding to the conduction positions of the first flow path 401 and the second flow path 402. The above structure realizes the rapid switching between filtration and flushing modes through a single rotation action. The sealing design ensures no leakage during long-term operation, and the limit mechanism avoids misoperation, significantly improving the safety of device operation and the efficiency of working condition switching.

[0054] As a technical optimization solution of this utility model, such as Figure 2 As shown, the oblique jet pipe 302 is evenly distributed circumferentially along the main flushing pipe 301 and extends to the central area of ​​the filter structure 2. Its acute-angle jet direction decomposes the water flow into a peeling force perpendicular to the filter screen 201 and a shearing force parallel to the filter screen 201. The pressurization structure 303 adopts a Venturi-type contraction tube section integrated in the middle of the main flushing pipe 301, and uses the fluid acceleration effect to increase the jet pressure. During backwashing, the high-speed water flow impacts the surface of the filter screen 201 at an acute angle through the oblique jet pipe 302, and the peeled impurities are carried to the sewage discharge channel by the parallel shear flow. The above structure achieves efficient backwashing without external power through the synergistic effect of self-pressurization and directional jetting, significantly reducing the impurity adhesion rate and reducing the structural load of the filter screen 201.

[0055] As a technical optimization solution of this utility model, such as Figure 2As shown, the large end of the filter screen 201 is fixed to the outlet end of the water inlet channel 101 of the housing 1, and the small end is suspended to form an impurity interception area; the outlet end of the oblique spray pipe 302 extends to the inside of the small end of the filter screen 201, and its spray direction is obliquely pointed towards the large end of the filter screen 201; during backwashing, the high-pressure water flow generates a spiral propulsion vortex along the inner wall of the filter screen 201, forming a shear force covering the surface of the filter screen 201, effectively peeling off the attached impurities and sucking them towards the drain port; the above structure achieves comprehensive cleaning of the filter screen 201 through directional vortex flushing, significantly improving the impurity removal effect, while reducing the impact damage of the water flow to the filter screen 201 and extending the service life of the filter structure 2.

[0056] As a technical optimization solution of this utility model, such as Figure 2 As shown, the cylindrical support 501 is fixed to the inner wall of the water inlet channel 101 at both ends by flanges. The intercepting net 503 and the cylindrical support 501 are fitted together to form an annular filter channel. The inlet fluid first passes through the intercepting net 503 to intercept large particles of impurities, and then enters the downstream through the through holes 502 of the cylindrical support 501. The through holes 502 of the cylindrical support 501 are arranged radially and obliquely to guide the water flow to generate a swirling shearing force to peel off impurities from the surface of the intercepting net 503. The intercepting net 503 is fixed to the cylindrical support 501 with a quick-release clamp, and can be axially removed for maintenance after being rotated to unlock. The above structure reduces the load on the main filter structure 2 through staged filtration, the swirling self-cleaning design on the surface of the intercepting net 503 reduces the frequency of clogging, and the quick-release mechanism enables tool-free maintenance, thus improving the overall filtration efficiency and service life of the device.

[0057] As a technical optimization solution of this utility model, such as Figures 1 to 2 As shown, the mating surfaces of the upper cover 103 and the lower cover 105 are provided with coaxial conical sealing ring grooves, and the inner wall of the locking ring 107 is machined with a helical thread that matches the conical ring groove. When the locking ring 107 is rotated, the helical thread on its inner wall drives the upper cover 103 and the lower cover 105 to be pressed axially, achieving zero fluid leakage through conical surface sealing. Anti-slip ribs are evenly distributed on the outer circumference of the locking ring 107, and tool slots are opened on the edge to enhance the tightening torque. Axial positioning bosses are provided on the flange sides of the upper cover 103 and the lower cover 105 to prevent excessive displacement of the locking ring 107. The locking ring 107 is embedded with a sealing ring that fits with the housing 1 with a clearance to avoid rotational wear. The above structure completes the sealing and disassembly of the housing 1 simultaneously through a single rotation action, significantly improving maintenance efficiency and sealing reliability.

[0058] As a technical optimization solution of this utility model, such as Figure 2As shown, the top opening of the impurity collection chamber 108 receives impurities discharged from the drain port of the stopcock valve body 403. Its side wall is an inclined guide surface to guide the impurities to slide down to the bottom of the chamber, ensuring efficient collection of impurities. The visual observation window 109 is embedded in the bottom wall or lower side wall of the impurity collection chamber 108, which facilitates real-time monitoring of the impurity accumulation status and allows for determination of the drain timing without disassembly. The drain valve 110 is located at the lowest point of the bottom wall of the impurity collection chamber 108. When the drain valve 110 is opened, the impurities accumulated at the bottom of the collection chamber can be completely discharged through the drain valve 110 under the action of gravity, effectively preventing impurity residue. This setting can significantly reduce the risk of impurity blockage after backwashing of the filter structure 2, simplify the maintenance operation process, and improve the reliability and service life of the device.

[0059] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A water pipe filtration device, characterized in that, include: The shell (1) has a through water inlet channel (101) and a water outlet channel (102) inside. The filter structure (2) is disposed in the housing (1) and located between the water inlet channel (101) and the water outlet channel (102) for intercepting impurities in the fluid; The flushing channel (3) is connected at one end to the water inlet channel (101) and at the other end to the water outlet surface of the filter structure (2), with its outlet direction facing the filter surface of the filter structure (2). The flow switching mechanism (4) is configured to switch between a first flow path (401) and a second flow path (402). The first flow path (401) is to connect the water inlet channel (101) to the water outlet channel (102). The second flow path (402) is to connect the flushing channel (3) to the water outlet channel (102); When the second flow path (402) is open, the fluid in the flushing channel (3) penetrates out from the outlet surface side of the filter structure (2) in the opposite direction and carries the impurities intercepted on the upstream side out.

2. The tap water pipe filtration device as described in claim 1, characterized in that: The flow diversion switching mechanism (4) includes: The stopcock valve body (403) is coaxially disposed at the inlet of the water outlet channel (102) and can rotate around its axis; An L-shaped guide hole (404) is provided through the stopcock valve body (403). Its first port (405) can be independently connected to the water inlet channel (101) or the flushing channel (3) by rotating the stopcock valve body (403), and its second port (406) is connected to the water outlet channel (102).

3. The tap water pipe filtration device as described in claim 2, characterized in that: The stopcock valve body (403) is provided with a valve stem (407) extending to the outside of the housing (1). The end of the valve stem (407) located outside the housing (1) is provided with an operating handle (408) for personnel to operate to switch the flow path of the first port (405).

4. The tap water pipe filtration device as described in claim 1, characterized in that: The flushing channel (3) includes: The main flushing pipe (301) is connected to the water inlet channel (101). An oblique jet pipe (302) is connected to the main flushing pipe (301), and its outlet extends to the water outlet surface side of the filter structure (2), and the jetting direction is set at an acute angle to the filter surface. A pressurization structure (303) is installed inside the main flushing pipe (301) to increase the fluid pressure inside the pipe.

5. The tap water pipe filtration device as described in claim 4, characterized in that: The filter structure (2) is a filter screen (201), with its large end facing the water inlet channel (101), and the axial direction of the oblique jet pipe (302) is set at an acute angle to the generatrix of the inner wall of the filter screen (201).

6. The tap water pipe filtration device as described in claim 1, characterized in that: A pre-filter unit (5) is installed in the water inlet channel (101); The pre-filter unit (5) includes: A cylindrical support (501) has a through hole (502) in its circumferential direction; The interception net (503) is coaxially sleeved on the outer surface of the cylindrical support (501).

7. The tap water pipe filtration device as described in claim 1, characterized in that: The housing (1) includes: The top cover (103) is provided with an inlet flange (104) that connects to the water inlet channel (101). The lower cover (105) is provided with an outlet flange (106) that connects to the water outlet channel (102). A locking ring (107) is rotatably fitted at the connection between the upper cover (103) and the lower cover (105).

8. The tap water pipe filtration device as described in claim 2, characterized in that: The bottom of the housing (1) is provided with an impurity collection chamber (108); The drain port of the plug valve body (403) is connected to the impurity collection chamber (108); The bottom of the impurity collection chamber (108) is provided with a visual observation window (109) and a drain valve (110).

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