A twin-turbine water purification backwash leakage protection pre-filter with anti-water hammer valve

Abstract

The present invention discloses a dual-turbine water purification backwash leakage protection pre-filter with an anti-water hammer valve, which relates to the technical field of filters and includes a filter bottle, a valve head fixedly connected to the top of the filter bottle, an anti-water hammer valve installed on the top of the valve head, a water inlet end and a water outlet end, a water inlet ball valve installed at the water inlet end of the valve head, a flow meter installed at the water outlet end of the valve head, a sewage ball valve installed at the bottom of the filter bottle, an external skeleton fixedly connected to the inside of the filter bottle, an internal skeleton fixedly connected to the external skeleton, and a water distributor fixedly connected to the internal skeleton. The present invention can close the water inlet ball valve immediately when a water leak occurs, reducing the loss caused by the water leak to the user's family; during filtration, the turbine turbulence generates centrifugal force, so that impurities will not be adsorbed; during backwashing, the inner turbine concentrates the water flow, increases the impact force, and rotates 360 degrees, so that the backwashing is cleaner, and the 360-degree spraying leaves no dead corners and does not cause uneven washing.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and in particular to a twin-turbine water purification backwash leakage protection pre-filter with an anti-water hammer valve. Background Art

[0002] A pre-filter is the first coarse filter for water in a house, filtering out silt, rust, and large particles from the tap water. It's typically installed after the water meter on the inlet pipe to prevent any harmful precipitation from the pipe network. It also protects concealed pipes, faucets, and electrical appliances.

[0003] Generally, a positive flush pre-filter has a high flushing flow rate, which is effective for flushing large particles. However, relying solely on the water flow to flush the filter surface is ineffective for firmly adhering particles, making them difficult to remove. While it is effective for removing tightly adhered particles, the suction port must be very close to the filter; otherwise, the negative pressure is weak and ineffective. At this close distance, large particles have difficulty entering the drainage channel, and therefore tend to accumulate in the filter housing and remain trapped. (Similar to a vacuum cleaner, which must be close to the ground to draw in dust; too far away is ineffective. When close to the ground, nearby rocks larger than the distance between the vacuum cleaner and the ground prevent them from entering.) Improper operation can easily cause dirt to be absorbed by the outer ring of the backwash frame, preventing it from fully rebounding. This can affect filtration and the amount of water flowing during backwash, and can even cause blockage and prevent water flow. Summary of the Invention

[0004] The object of the present invention is to provide a twin-turbine water purification backwash leakage protection pre-filter with an anti-water hammer valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a dual-turbine water purification backwash leakage protection pre-filter with an anti-water hammer valve, comprising a filter bottle, a valve head fixedly connected to the top of the filter bottle, an anti-water hammer valve installed on the top of the valve head, the valve head is provided with a water inlet end and a water outlet end, a water inlet ball valve is installed at the water inlet end of the valve head, a flow meter is installed at the water outlet end of the valve head, a sewage discharge ball valve is installed at the bottom of the filter bottle, an exoskeleton is provided inside the filter bottle, an inner skeleton is provided inside the exoskeleton, a water divider is fixedly connected to the outside of the upper end of the inner skeleton, a stainless steel filter is fixedly connected to the outer wall of the inner skeleton, a switching piece is fixedly connected to the top of the inner skeleton, a backwash skeleton is fixedly connected to the top of the switching piece, a piston is threadedly connected to the bottom of the switching piece, the outer wall of the top of the inner skeleton is rotatably connected to the outer turbine, the inner wall of the bottom of the inner skeleton is fixedly connected to a swivel, and the top of the swivel is fixedly connected to the inner turbine that surrounds the switching piece.

[0006] Preferably, a water inlet ball valve actuator is installed on the top of the valve head above the water inlet ball valve, and a sewage discharge actuator is installed on the outer wall of the sewage discharge ball valve.

[0007] Preferably, an annular groove is provided inside the upper end of the switching member to cooperate with and be fixed to the first rib of the backwash skeleton, a second groove is also provided at the upper end of the switching member and a sealing ring is provided in the groove, an external thread is provided at the lower end of the switching member to cooperate with and be fixed to the internal thread of the piston, and a backwash spring is provided at the lower end of the piston.

[0008] Preferably, a silicone sleeve is fixedly connected to the top of the outer wall of the switching member.

[0009] Preferably, a backwash net is provided inside the inner wall of the backwash skeleton, and the backwash net is provided between the backwash skeleton and the switching member.

[0010] Preferably, a plurality of oblique guide plates are fixedly connected to the outer wall of the outer turbine at equal intervals.

[0011] Preferably, the water separator has multiple third ribs for positioning with the filter bottle, and is provided with multiple oblique spoilers, and is also provided with multiple first clips that are fixed with the clip grooves of the inner skeleton, and is provided with multiple fourth ribs for positioning that are matched with the third grooves of the inner skeleton.

[0012] Preferably, a soft scraping component is embedded in the outer skeleton, and the soft scraping component can be made of a brush or a silicone scraping strip, and the soft scraping component is in interference contact with the outer surface of the stainless steel filter screen and the inner wall of the filter bottle at the same time.

[0013] Preferably, the anti-water hammer valve includes a cavity, a piston body arranged inside the cavity, a valve seat threadedly connected to the cavity, and a buffer spring arranged between the cavity and the piston body.

[0014] Preferably, grooves and sealing rings are provided between the cavity and the piston body, and between the cavity and the valve seat, and a positioning column is provided on the piston body to cooperate with the positioning hole on the valve seat, and a plurality of water holes are also provided inside the valve seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The dual-turbine water purification backwash leakage protection pre-filter with anti-water hammer valve is a leakage protector with an anti-water hammer valve plus a pre-filter. When the water pressure of the user's home water is too high, the anti-water hammer valve can absorb part of the water pressure to protect the rear-end pipes and water-using equipment; at the same time, when the operating environment temperature is too low and the water in the pipe is frozen, the anti-water hammer valve can absorb the expansion force generated by the water freezing to protect the rear-end water-using equipment and pipes from being burst; the flow meter detects the user's home water flow in real time, and when a leak occurs, the water inlet ball valve can be closed immediately to reduce the loss caused by the leak to the user's home; the turbine turbulence during filtration generates centrifugal force to prevent impurities from being adsorbed; during backwashing, the inner turbine concentrates the water flow to increase the impact force, and rotates 360°, so the backwashing is cleaner, and the 360° spraying leaves no dead corners and will not cause uneven washing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic cross-sectional view of the present invention;

[0018] Figure 2 Schematic diagram of the filtering state structure of the present invention;

[0019] Figure 3 A schematic structural diagram of the flushing state of the present invention;

[0020] Figure 4 A schematic diagram of the valve head structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the first structure of the exoskeleton of the present invention;

[0022] Figure 6 This is a schematic diagram of the second structure of the exoskeleton of the present invention;

[0023] Figure 7 This is a schematic diagram of the installation structure of the silicone strip of the present invention;

[0024] Figure 8 Schematic diagram of the water divider structure of the present invention;

[0025] Figure 9 Schematic diagram of the inner skeleton structure of the present invention;

[0026] Figure 10 This is a schematic diagram of the backwash skeleton structure of the present invention;

[0027] Figure 11 A schematic diagram of the switching structure of the present invention;

[0028] Figure 12 This is a schematic diagram of the installation structure of the switching component of the present invention;

[0029] Figure 13 It is a schematic diagram of the turbine structure of the present invention;

[0030] Figure 14 A schematic diagram of the first structure of the piston of the present invention;

[0031] Figure 15 A schematic diagram of the second structure of the piston of the present invention;

[0032] Figure 16 It is a schematic diagram of the fixing structure of the present invention;

[0033] Figure 17 This is a schematic diagram of the first structure of the inner turbine of the present invention;

[0034] Figure 18 This is a schematic diagram of the second structure of the inner turbine of the present invention;

[0035] Figure 19 A schematic diagram of the transposition structure of the present invention;

[0036] Figure 20 This is a schematic structural diagram of the anti-water hammer valve of the present invention;

[0037] Figure 21 A schematic diagram of the valve seat structure of the present invention;

[0038] Figure 22 It is a schematic diagram of the piston body structure of the present invention.

[0039] In the figure: 1, anti-water hammer valve; 1a, cavity; 1b, buffer spring; 1c, valve seat; 1d, first sealing ring; 1e, second sealing ring; 1f, piston body; 2, flow meter; 3, valve head; 301, first groove; 4, fixing piece; 401, first clip; 402, first positioning rib; 403, first notch; 5, backwash skeleton; 501, first convex rib; 6, silicone sleeve; 7, switching piece; 701, annular groove; 702, first plane; 703, second groove; 704, external thread; 8, water distributor; 801, third convex rib; 802, spoiler; 803, first clip; 804, fourth convex rib; 9, outer turbine; 10, inner turbine; 10 01. Pressurization hole; 1002. Square hole; 11. Inner skeleton; 1101. Third groove; 1102. Second plane; 1103. Buckle groove; 12. Stainless steel filter; 13. Rotary seat; 1301. Second buckle; 14. Piston; 1401. Internal thread; 1402. Fourth groove; 1403. Third notch; 1404. Fifth groove; 1405. Third plane; 1406. Second positioning rib; 15. Backwash spring; 16. Sewage ball valve; 17. Sewage actuator; 18. Water inlet ball valve actuator; 19. Water inlet ball valve; 20. Filter bottle; 21. Exoskeleton; 2101. Ring groove; 2102. Sixth groove; 2103. Seventh groove. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0041] It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0043] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined or described in one figure, it will not need to be further discussed and described in detail in the description of the subsequent figures.

[0044] Introduction to the main parts features and functions:

[0045] The anti-water hammer valve 1 can absorb part of the water pressure when the water pressure is high, protecting the rear-end pipelines and water-using equipment.

[0046] Flow meter 2 detects the user's single water flow, single water usage duration and cumulative flow in real time. When the user's single water flow and water usage duration exceed the set value, the flow meter will feed back the signal to the control board, and the control board outputs the signal to close the water inlet ball valve 19 to achieve the water leakage protection function.

[0047] The valve head 3, the first groove 301 on the valve head 3 is used to cooperate with the four first-level buckles 401 on the fixing member 4 for installation.

[0048] The fixing part 4 and the two first positioning ribs 402 on the fixing part 4 just form a limit with the valve head 3, ensuring that the first notch 403 on the fixing part 4 corresponds to the water outlet on the valve head 3, and will not affect the water flow.

[0049] The backwash skeleton 5 and the first rib 501 on the backwash skeleton 5 are engaged with the annular groove 701 on the switching member 7, and the backwash net installed inside the backwash skeleton 5 is fixed between the backwash skeleton 5 and the switching member 7.

[0050] The first flat surface 702 of the switching element 7 mates with the second flat surface 1102 of the inner frame 11, acting as a limiter to prevent the backwash spring 15 from failing due to excessive water pressure during flushing. The second groove 703 is used to accommodate an O-ring, which seals the gap between the switching element 7 and the inner frame 11 and prevents water from flowing through. During filtration, this prevents unfiltered water from entering the clean water area and affecting the filtration effect. During flushing, this prevents water from flowing through the gap between the two, which could reduce the backwash water pressure and affect the backwash effect. The external thread 704 screws into the internal thread 1401 of the piston 14. When the backwash mode is switched to the filtering mode, the third flat surface 1405 of the piston 14, under the force of the backwash spring 15, causes the piston 14 to move upward, thereby driving the switching element 7 upward, effectively switching the water path.

[0051] The water separator 8 has four evenly distributed third convex ribs 801 that cooperate with the four concave ribs on the filter bottle 20 to prevent the water separator 8 from rotating; the two internal fourth convex ribs 804 cooperate with the two third grooves 1101 on the inner skeleton 11 to fix the inner skeleton 11 and prevent it from rotating; the four evenly distributed first buckles 803 are buckled in the four buckle grooves 1103 on the inner skeleton 11; the water separator 8 has spoilers 802 evenly distributed, and water will form a water vortex after flowing along the spoiler 802, providing greater power for the rotation of the outer turbine 9 at the rear end.

[0052] The outer turbine 9 is fixed to the switching element 7 and mainly serves to divert water. It has an oblique diversion effect, forming a vortex during filtration, generating centrifugal force, separating impurities, and preventing impurities from sticking to the filter screen or the bottle body, which can enhance the backwash effect. At the same time, when the water flow hits the side of the oblique diversion, the water flow will drive the outer turbine 9 to rotate 360 ​​degrees.

[0053] The inner turbine 10 has three boost holes 1001 on each side. These holes are designed to reduce the area of ​​the water outlet when the water flow rate is constant, thereby increasing the impact of the water flow and achieving a better flushing effect. The two symmetrical square holes 1002 on the front and back are used to mount the two symmetrical second clips 1301 on the rotating seat 13, connecting the inner turbine 10 to the rotating seat 13. The shape of the rotating seat 13 is the same as the bottom of the inner turbine 10. The protrusions between the two prevent damage to the two second clips 1301 on the rotating seat 13 due to the rotation of the rotating seat 13 or the inner turbine 10. The six boost holes 1001 are oblique outlets. When water flows out, the impact of the boost holes 1001 on the side walls will drive the inner turbine 10 to rotate 360°, ensuring that the filter is flushed 360° without leaving any blind spots.

[0054] The rotating base 13 and its two symmetrical second clips 1301 fit over the two symmetrical notches at the bottom of the inner turbine 10, connecting the inner turbine 10 to the rotating base 13. The shape of the rotating base 13 is the same as the bottom of the inner turbine 10, and the protrusions between the two prevent damage to the two second clips 1301 on the rotating base 13 due to rotation of the rotating base 13 or the inner turbine 10. The rotating base 13 is secured by the two clips inside the inner frame 11, preventing the rotating base 13 and the inner turbine 10 from moving up and down together due to water pressure and the movement of the switching member 7.

[0055] The internal thread 1401 on the piston 14 connects to the external thread 704 on the switching element 7. When switching from backwash to filtration mode, the force of the backwash spring 15 on the third flat surface 1405 of the piston 14 causes the piston 14 to move upward, thereby driving the switching element 7 upward, effectively switching the water path. The fourth groove 1402 houses an O-ring, sealing the gap between the inner frame 11 and the piston 14 and preventing water from flowing through. During filtration, this prevents unfiltered water from entering the clean water area and affecting filtration efficiency. During flushing, this prevents water from flowing through the gap between the two, reducing backwash pressure and affecting backwash efficiency. The fifth groove 1404 houses a silicone gasket, sealing the gap between the piston 14 and the outer frame 21. During filtration, this prevents water from escaping through the gap and allows it to drain through two symmetrical third notches 1403. These two third notches 1403 act as a siphon, facilitating the removal of impurities from the pre-filter. Under the force of the backwash spring 15, the third plane 1405 causes the piston 14 to move upward, thereby driving the switching member 7 upward, achieving the effect of water path switching. The second positioning rib 1406 is used to fix the position of the backwash spring 15, so that the backwash spring 15 is perpendicular to the bottle body regardless of whether it is exerting force or receiving force, preventing the backwash spring 15 from being deformed and unable to rebound during the flushing process.

[0056] The exoskeleton 21 is provided with two annular grooves 2101 for receiving O-rings. This prevents impurities from entering the gap between the filter bottle 20 and the exoskeleton 21, which could cause accumulation and prevent the exoskeleton 21 from rotating to clean the water. Sixth and seventh grooves 2102 and 2103 are also provided for receiving two silicone scrapers, each in two sections, for a total of four sections. This ensures that each rotation of the exoskeleton 21 removes impurities from the filter bottle 20 and the stainless steel filter screen 12, leaving no blind spots.

[0057] like Figure 1-22As shown, the present invention provides a technical solution: a double-turbine water purification backwash leakage protection pre-filter with an anti-water hammer valve, comprising a filter bottle 20, a valve head 3 fixedly connected to the top of the filter bottle 20, an anti-water hammer valve 1 installed on the top of the valve head 3, the valve head 3 is provided with a water inlet end and a water outlet end, the water inlet end of the valve head 3 is provided with a water inlet ball valve 19, the water outlet end of the valve head 3 is provided with a flow meter 2, a sewage ball valve 16 is installed at the bottom of the filter bottle 20, an outer skeleton 21 is provided inside the filter bottle 20, an inner skeleton 11 is provided inside the outer skeleton 21, the upper end of the inner skeleton 11 is fixedly connected to a water divider 8, the outer wall of the inner skeleton 11 is fixedly connected to a stainless steel filter screen 12, the top of the inner skeleton 11 is fixedly connected to a switching member 7, the top of the switching member 7 is fixedly connected to a backwash skeleton 5, the bottom of the switching member 7 is threadedly connected to a piston 14, the outer wall of the top of the inner skeleton 11 is rotatably connected to an outer turbine 9, and the bottom of the inner skeleton 11 is internal. The wall is fixedly connected with a swivel seat 13, and the top of the swivel seat 13 is fixedly connected with an inner turbine 10 that surrounds the switching piece 7. The top of the valve head 3 is located above the water inlet ball valve 19, and the water inlet ball valve actuator 18 is installed. The outer wall of the sewage ball valve 16 is installed with a sewage actuator 17. An annular groove 701 is provided inside the upper end of the switching piece 7, which cooperates and is fixed with the first rib 501 of the backwash skeleton 5. A second groove 703 is also provided at the upper end of the switching piece 7, and a sealing ring is provided in the groove. The lower end of the switching piece 7 is provided with an external thread 704, which cooperates and is fixed with the internal thread 1401 of the piston 14. The lower end of the piston 14 is provided with a backwash spring 15. The top of the outer wall of the switching piece 7 is fixedly connected with a silicone sleeve 6, and a backwash net is provided inside the inner wall of the backwash skeleton 5. The backwash net is arranged between the backwash skeleton 5 and the switching piece 7. A plurality of oblique guide plates are fixedly connected to the outer wall of the outer turbine 9 at equal distances.

[0058] The water separator 8 has multiple third ribs 801 for positioning with the filter bottle 20, and is provided with multiple oblique spoilers 802. It is also provided with multiple first clips 803 that cooperate with the clip grooves 1103 of the inner skeleton 11 for fixing, and is provided with multiple fourth ribs 804 for positioning that cooperate with the third grooves 1101 of the inner skeleton 11.

[0059] A soft scraping component is also embedded in the outer skeleton 21. The soft scraping component can be made of a brush or a silicone scraping strip, and the soft scraping component is in interference contact with the outer surface of the stainless steel filter 12 and the inner wall of the filter bottle 20 at the same time.

[0060] The anti-water hammer valve 1 includes a cavity 1a, a piston body 1f arranged inside it, a valve seat 1c threadedly connected to the cavity 1a, a buffer spring 1b arranged between the cavity 1a and the piston body 1f, grooves and sealing rings are provided between the cavity 1a and the piston body 1f, and the cavity 1a and the valve seat 1c, namely the first sealing ring 1d and the second sealing ring 1e respectively. The piston body 1f is provided with a positioning column to cooperate with the positioning hole on the valve seat 1c, and multiple water holes are also provided inside the valve seat 1c.

[0061] The details that need to be noted are that a seal is installed at the lower end of the filter bottle 20, and a drain ball valve 16 is installed at the lower end of the seal for draining sewage. The upper end of the seal is engaged with the exoskeleton 21, and the lower end is engaged with the drain ball valve 16. When the seal rotates, the exoskeleton 21 will rotate accordingly. An O-ring is provided on the exoskeleton 21 to seal the gap between the exoskeleton 21 and the filter bottle 20, and two silicone scrapers are installed to scrape off the inner surface of the filter bottle 20 and dirt on the stainless steel filter screen 12 when the exoskeleton 21 rotates.

[0062] An inner frame 11 is provided inside the outer frame 21, a stainless steel filter screen 12 is provided outside the inner frame 11, and a switching part 7 is designed at the upper end of the inner frame 11, which can be used to switch the water path during flushing to achieve the effect of backwashing.

[0063] An O-ring is provided at the upper end of the switching member 7 to prevent water from flowing into the clean water area through the gap between the switching member 7 and the fixing member 4 during filtration, affecting the filtration effect, regardless of whether it is in the filtering or flushing state; an O-ring is also provided at the lower end of the switching member 7 to prevent water from flowing into the clean water area (the inside of the filter is the clean water area) through the gap between the switching member 7 and the inner skeleton 11 during filtration, affecting the filtration effect.

[0064] A gasket is provided between the piston 14 and the inner frame 11 for sealing the two to prevent particles from entering through the gap between the two and forming particle accumulation. As a result, during backwashing, the friction force is too large and the water pressure cannot move the outer frame 21 downward, thus failing to achieve the backwashing function.

[0065] A backwash spring 15 is provided inside the piston 14 to provide power when the piston 14 drives the switching member 7 to move upward when the backwash is converted to the normal filtering state.

[0066] During normal filtration, the water pressure is essentially uniform throughout the filter bottle 20. At this time, the spring force of the backwash spring 15 acts on the third flat surface 1405 of the piston 14, forcing the piston 14. Because the internal thread 1401 on the piston 14 connects to the external thread 704 on the switching element 7, the piston 14 is also held in place by the backwash spring 15. The second groove 703 is used to receive an O-ring, which seals the gap between the switching element 7 and the inner frame 11, preventing water from flowing through the gap. During filtration, this prevents unfiltered water from entering the clean water area without passing through the stainless steel filter screen 12, thereby affecting filtration efficiency. During flushing, this prevents water from flowing through the gap between the two, thereby reducing backwash pressure and compromising backwash efficiency. During filtration, water flowing through the blades of the outer turbine 9 creates a vortex, generating centrifugal force that separates impurities and prevents them from sticking to the filter screen or the filter bottle 20, enhancing the backwash effect. Furthermore, when the water impacts the side of the diagonal guide, it drives the outer turbine 9 to rotate 360°. The water distributor 8 is evenly distributed with spoilers 802. When the water flows along the spoilers 802, a water vortex is formed, which provides greater power for the rotation of the outer turbine 9 at the rear end.

[0067] During backwash mode, when the user-set automatic flush timer arrives, or when the user manually flushes and drains, the drain ball valve 16 opens, allowing water to flow into the two third siphon notches 1403 on the inner frame 11. The piston 14 moves downward under the water pressure. Because the internal threads 1401 on the piston 14 engage with the external threads 704 on the movable switching element 7, the piston 14 drives the switching element 7 downward, until the first flat surface 702 on the switching element 7 contacts the second flat surface 1102 of the inner frame 11, at which point the switching element 7 and piston 14 stop moving downward. The silicone sleeve 6 mounted on the switching element 7 is also driven downward. Water flows through the gap between the silicone sleeve 6 and the fixing element 4 into the backwash frame 5, then flows through the switching element 7, and is sprayed outward by the inner turbine 10 to flush the stainless steel filter 12. The six boost holes 1001 on the inner turbine 10 are oblique water outlets. When water is discharged, the water flow hits the side wall of the boost hole 1001, which will drive the inner turbine 10 to rotate 360°, ensuring that the filter can be flushed 360° without leaving any dead corners.

[0068] After backwashing is complete, the drain actuator 17 closes the drain ball valve 16, causing the backwash spring 15 to rebound. The spring force acts on the third flat surface 1405 of the piston 14, driving the piston 14 upward. Because the switching element 7 and piston 14 are threaded together, the piston 14 also moves the switching element 7 upward. As the switching element 7 moves upward, the silicone sleeve 6 mounted on the switching element 7 also moves upward, sealing the gap between the fixing element 4 and the switching element 7. This opens the water flow channel between the switching element 7 and the inner frame 11, enabling filtration.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A double turbine water purification backwash leakage protection pre-filter with anti-water hammer valve, comprising a filter bottle (20), characterized in that The top of the filter bottle (20) is fixedly connected with a valve head (3), the top of the valve head (3) is equipped with an anti-water hammer valve (1), the valve head (3) is provided with a water inlet end and a water outlet end, the water inlet end of the valve head (3) is equipped with a water inlet ball valve (19), the water outlet end of the valve head (3) is equipped with a flow meter (2), the bottom of the filter bottle (20) is equipped with a sewage ball valve (16), the filter bottle (20) is provided with an outer frame (21), the outer frame (21) is provided with an inner frame (11), the upper end of the inner frame (11) is fixedly connected to the outside of the water distributor ( 8), the outer wall of the inner frame (11) is fixedly connected to a stainless steel filter (12), the top of the inner frame (11) is fixedly connected to a switching member (7), the top of the switching member (7) is fixedly connected to a backwash frame (5), the bottom of the switching member (7) is threadedly connected to a piston (14), the top outer wall of the inner frame (11) is rotatably connected to an outer turbine (9), the bottom inner wall of the inner frame (11) is fixedly connected to a rotating seat (13), and the top of the rotating seat (13) is fixedly connected to an inner turbine (10) that surrounds the switching member (7); An annular groove (701) is provided inside the upper end of the switching member (7) and is matched with and fixed to the first rib (501) of the backwash frame (5); a second groove (703) is also provided at the upper end of the switching member (7) and a sealing ring is provided in the groove; an external thread (704) is provided at the lower end of the switching member (7) and is matched with and fixed to the internal thread (1401) of the piston (14); a backwash spring (15) is provided at the lower end of the piston (14); A silicone sleeve (6) is fixedly connected to the top of the outer wall of the switching member (7).

2. A twin-turbine water purification backwash leakage protection pre-filter with anti-water hammer valve according to claim 1, characterized in that A water inlet ball valve actuator (18) is installed at a position above the water inlet ball valve (19) on the top of the valve head (3), and a sewage discharge actuator (17) is installed on the outer wall of the sewage discharge ball valve (16).

3. A twin-turbine water purification backwash leakage protection pre-filter with anti-water hammer valve according to claim 1, characterized in that A backwash net is provided inside the inner wall of the backwash skeleton (5), and the backwash net is provided between the backwash skeleton (5) and the switching member (7).

4. A twin-turbine water purification backwash leakage protection pre-filter with anti-water hammer valve according to claim 1, characterized in that The outer wall of the outer turbine (9) is fixedly connected with a plurality of oblique guide plates at equal intervals.

5. A twin-turbine water purification backwash leakage protection pre-filter with anti-water hammer valve according to claim 1, characterized in that The water separator (8) has a plurality of third ribs (801) for positioning with the filter bottle (20), is provided with a plurality of oblique spoilers (802), is further provided with a plurality of first buckles (803) that cooperate with the buckle grooves (1103) of the inner frame (11) for fixing, and is provided with a plurality of fourth ribs (804) for positioning that cooperate with the third grooves (1101) of the inner frame (11).

6. A twin-turbine water purification backwash leakage protection pre-filter with anti-water hammer valve according to claim 1, characterized in that A soft scraping component is also embedded in the outer frame (21), and the soft scraping component is made of a brush or a silicone scraping strip, and the soft scraping component is in interference contact with the outer surface of the stainless steel filter (12) and the inner wall of the filter bottle (20).

7. A twin-turbine water purification backwash leakage protection pre-filter with anti-water hammer valve according to claim 1, characterized in that The anti-water hammer valve (1) comprises a cavity (1a), a piston body (1f) arranged inside the cavity (1a), a valve seat (1c) threadedly connected to the cavity (1a), and a buffer spring (1b) arranged between the cavity (1a) and the piston body (1f).

8. A twin-turbine water purification backwash leakage protection pre-filter with anti-water hammer valve according to claim 7, characterized in that Grooves and sealing rings are provided between the cavity (1a) and the piston body (1f), and between the cavity (1a) and the valve seat (1c), and a positioning column is provided on the piston body (1f) to cooperate with a positioning hole on the valve seat (1c), and a plurality of water holes are also provided inside the valve seat (1c).

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