Anti-siphon flushing valve

Abstract

The utility model discloses an anti-siphon flushing valve which comprises a valve body, and a water inlet channel and two water outlet channels are arranged on the valve body. The vacuum breaker comprises an air inlet cover and a siphon core, the air inlet cover is arranged at the position, corresponding to the upper portion of the water inlet channel, of the valve body, an air inlet channel is formed in the air inlet cover, and the siphon core is movably arranged between the upper end of the water inlet channel and the inner end of the air inlet channel; a first gasket and a second gasket are installed at the upper end and the lower end of the siphon core respectively, the second gasket is made of an elastic material, when water passes through the water inlet channel, the siphon core ascends under the action of water pressure, and the first gasket abuts against the inner end of the air inlet channel to block the air inlet channel; the siphon core falls down due to self weight, and the second gasket abuts against the upper end face of the water inlet channel to block the water inlet channel. When the non-return structure is damaged by foreign matters, the anti-siphon effect can still be effectively provided, and flowing-out sewage is prevented from flowing back into a water supply pipeline again due to the action of negative pressure suction force.

Description

Technical Field

[0001] The utility model relates to the technical field of flush valves, in particular to an anti-siphon flush valve. Background Art

[0002] In the jet siphon toilet on the market, there are two flush water outlets, upper and lower. The water flow out of the upper flush water outlet flows downward in a vortex; the lower flush water outlet is located in the cistern and is aligned with the sewage outlet. The water flows in the upper and lower flush water outlets are flushed through two independent and unconnected solenoid valves. When flushing, the water flow is first ejected from the upper flush water outlet to wash the pool wall, then the upper flush water outlet stops flushing, and the lower flush water outlet ejects water flow to form a siphon to directly flush the dirt into the sewage outlet. After flushing, the two independent upper and lower flush water pipes remain in a full pipe state due to the atmospheric pressure for the next cycle.

[0003] The above-mentioned jet siphon toilet is usually equipped with a flush valve that has two water flow channels and two electromagnetic control valves at the same time. The flush valve includes an inlet valve body and left and right electromagnetic flush valve bodies connected in series on the left and right sides of the inlet valve body. The water inlets of the two electromagnetic flush valve bodies are respectively connected to the two water outlets on both sides of the inlet valve body. Generally, a vacuum breaker is also provided at the upper end of the inlet valve body. An anti-siphon valve flap that can be automatically opened and closed according to the internal and external air pressures is provided in the vacuum breaker. When the toilet starts flushing and the water supply network stops supplying water, the air pressure in the inlet valve body is less than the external atmospheric pressure, then the anti-siphon valve flap opens, releasing the external air into the inlet valve body to prevent the sewage in the cistern from being sucked back into the water supply network due to negative pressure.

[0004] However, since the anti-siphon valve flap and the end face of the water inlet end are easily damaged by foreign objects (such as steel needles, wool threads, etc.), the check valve function is damaged, so that the already discharged sewage flows back into the water supply pipe again due to the action of negative pressure suction. Content of the Utility Model

[0005] The purpose of the utility model is to provide an anti-siphon flush valve. When the check structure of the utility model is damaged by foreign objects, it can still effectively provide an anti-siphon effect to prevent the already discharged sewage from flowing back into the water supply pipe again due to the action of negative pressure suction.

[0006] To achieve the above object, the present utility model provides the following technical solutions: an anti-siphon flushing valve, comprising a valve body, an inlet channel and two outlet channels are provided on the valve body, and a check solenoid valve is installed on the outlet channel; further comprising a vacuum breaker, the vacuum breaker includes an air inlet cover and a siphon core, the air inlet cover is arranged at a position corresponding to the upper part of the inlet channel of the valve body, an air inlet channel communicating inside and outside is provided on the air inlet cover, the siphon core is movably arranged between the upper end of the inlet channel and the inner end of the air inlet channel, and a first gasket and a second gasket are respectively installed at the upper and lower ends of the siphon core, the second gasket is made of an elastic material, when water passes through the inlet channel, the siphon core moves upward under the action of water pressure and the first gasket abuts against the inner end of the air inlet channel to block the air inlet channel, when the water supply in the inlet channel is cut off, the siphon core falls due to its own weight and the second gasket abuts against the upper end surface of the inlet channel to block the inlet channel.

[0007] By adopting the above technical solutions, since the second gasket is made of an elastic material and can deform under its own force, therefore, even when there is a foreign object between the second gasket and the inner end of the inlet channel, resulting in the destruction of the check function, the negative pressure generated inside can also cause the second gasket to deform and enclose the surface of the foreign object, making the gap between the foreign object and the second gasket very small, so as to effectively prevent the sewage that has flowed out from flowing back into the water supply pipeline again due to the action of negative pressure suction, and the second gasket can also ensure that when the siphon phenomenon occurs, the air intake volume is reduced.

[0008] The present utility model is further arranged such that the second gasket is made of rubber material.

[0009] By adopting the above technical solutions, it not only has good elasticity but also has a long service life. When the check structure of the product is damaged by foreign objects, it can still effectively provide the anti-siphon effect.

[0010] The present utility model is further arranged such that the siphon core is of a hollow structure.

[0011] By adopting the above technical solutions, the siphon core is hollow, has a greater buoyancy, and water will not flow out from the air inlet.

[0012] The present utility model is further arranged such that the siphon core includes an upper cover and a lower cover, a first concave portion is provided at the lower end of the upper cover, a second concave portion is provided at the upper end of the lower cover, the upper cover and the lower cover are detachably connected together, and the first concave portion and the second concave portion form a cavity.

[0013] By adopting the above technical solutions, the upper cover and the lower cover with concave portions are assembled together to form a siphon core with a cavity, which is more convenient for processing and production.

[0014] The present utility model is further configured such that a plurality of locking protrusions are circumferentially and arrayedly distributed at the lower end of the upper cover, a plurality of locking grooves adapted to the locking protrusions are provided at the upper end of the lower cover, and the locking protrusions are in interference fit with the corresponding locking grooves.

[0015] By adopting the above technical solution, the connection structure is simple and reliable, and the disassembly and assembly are very convenient.

[0016] The present utility model is further configured such that an annular water retaining rib is provided at the upper end of the lower cover, and an annular water retaining groove adapted to the annular water retaining rib is provided at the lower end of the upper cover.

[0017] By adopting the above technical solution, the annular water retaining rib and the annular water retaining groove cooperate to form a water retaining structure, which can prevent external water from entering the inside of the siphon core and causing the buoyancy of the siphon core to become smaller.

[0018] The present utility model is further configured such that a conical guiding portion is provided at the upper end of the upper cover, the outer periphery of the conical guiding portion is adapted to the inner periphery of the air inlet passage, a guiding sleeve is provided at the lower end of the lower cover, the outer periphery of the guiding sleeve is adapted to the inner periphery of the water inlet passage, and a water passing port is provided through the side portion of the guiding sleeve.

[0019] By adopting the above technical solution, both the conical guiding portion and the guiding sleeve can guide the siphon core. That is, when the siphon core moves upward, the outer periphery of the conical guiding portion fits with the inner periphery of the air inlet passage, and when the siphon core moves downward, the outer periphery of the guiding sleeve fits with the inner periphery of the water inlet passage, so that the siphon core can always maintain axial movement and make the performance of the vacuum breaker more reliable.

[0020] The present utility model is further configured such that a first annular clamping groove is formed between the conical guiding portion and the upper cover, the inner edge portion of the first gasket is clamped in the first annular clamping groove, a second annular clamping groove is formed between the guiding sleeve and the lower cover, and the inner edge portion of the second gasket is clamped in the second annular clamping groove.

[0021] By adopting the above technical solution, the installation structures of the first gasket and the second gasket are simple and reliable, and the disassembly and assembly are very convenient.

[0022] The present utility model is further configured such that an upper cavity communicating with the first concave portion is provided inside the conical guiding portion, and a long guiding rod extending vertically is further provided at the bottom end of the lower cover, and a lower cavity communicating with the second concave portion is provided vertically inside the long guiding rod.

[0023] By adopting the above technical solution, the buoyancy received by the siphon core can be further increased, so that when the water inlet passage is filled with water, the cooperation between the first gasket and the inner end of the air inlet passage is closer, ensuring that water will not flow out of the inlet passage.

[0024] The present utility model is further configured such that the air inlet cover is detachably mounted at the upper opening of the valve body through a plurality of fasteners, and a sealing ring is clamped between the air inlet cover and the valve body.

[0025] By adopting the above technical solution, the connection structure is simple and reliable, the disassembly and assembly are very convenient, and the sealing performance is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of the whole of the present utility model;

[0027] Figure 2 is a cross-sectional view of the whole of the present utility model;

[0028] Figure 3 is a schematic assembly structure diagram of the siphon core, the first gasket and the second gasket of the present utility model;

[0029] Figure 4 is Figure 3 a cross-sectional view of the structure;

[0030] Figure 5 is Figure 3 an exploded view of the structure.

[0031] In the figure: 1. Valve body; 2. Water inlet channel; 3. Water outlet channel; 4. Check valve solenoid valve; 5. Vacuum breaker; 6. Air inlet cover; 7. Siphon core; 8. Air inlet channel; 9. First gasket; 10. Second gasket; 11. Upper cover; 12. Lower cover; 13. First concave portion; 14. Second concave portion; 15. Cavity; 16. Locking protrusion; 17. Locking groove; 18. Annular water retaining rib; 19. Annular water retaining groove; 20. Conical guiding portion; 21. Guide sleeve; 22. Water passing port; 23. First annular clamping groove; 24. Second annular clamping groove; 25. Upper cavity; 26. Long guide rod; 27. Lower cavity; 28. Fastener; 29. Sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] Embodiment: As shown in the attached Figures 1 to 5The anti-siphon flushing valve shown includes a valve body 1, an inlet channel 2 and two outlet channels 3 are provided on the valve body 1, and a check solenoid valve 4 is installed on the outlet channel 3; the anti-siphon flushing valve further includes a vacuum breaker 5, the vacuum breaker 5 includes an air inlet cover 6 and a siphon core 7, the air inlet cover 6 is arranged at a position on the valve body 1 corresponding to the upper part of the inlet channel 2, an air inlet channel 8 communicating inside and outside is provided on the air inlet cover 6, the siphon core 7 is movably arranged between the upper end of the inlet channel 2 and the inner end of the air inlet channel 8, and a first gasket 9 and a second gasket 10 are respectively installed at the upper and lower ends of the siphon core 7, the second gasket 10 is made of an elastic material. When water flows through the inlet channel 2, the siphon core 7 moves upward under the action of water pressure and the first gasket 9 abuts against the inner end of the air inlet channel 8 to block the air inlet channel 8. When the water supply in the inlet channel 2 stops, the siphon core 7 falls due to its own weight and the second gasket 10 abuts against the upper end face of the inlet channel 2 to block the inlet channel 2. Since the second gasket 10 is made of an elastic material and can deform under its own force, even if there is a foreign object between the second gasket 10 and the inner end of the inlet channel 2 resulting in the failure of the check function, the negative pressure generated inside can deform the second gasket 10 and enclose the surface of the foreign object, making the gap between the foreign object and the second gasket 10 very small, so as to effectively prevent the sewage that has flowed out from flowing back into the water supply pipe again due to the action of negative pressure suction, and the second gasket 10 can also ensure that when a siphon phenomenon occurs, the amount of air intake is reduced.

[0034] Wherein, the second gasket 10 is made of rubber material. It not only has good elasticity but also has a long service life. When the check structure of the product is damaged by foreign objects, it can still effectively provide the anti-siphon effect.

[0035] As shown in the appendix Figure 2 and the appendix Figure 4 As shown, the siphon core 7 is of a hollow structure. The siphon core 7 is hollow, has a greater buoyancy, and water will not flow out from the air inlet.

[0036] As shown in the appendix Figure 4 As shown, more specifically, the siphon core 7 includes an upper cover 11 and a lower cover 12, a first concave portion 13 is provided at the lower end of the upper cover 11, a second concave portion 14 is provided at the upper end of the lower cover 12, the upper cover 11 and the lower cover 12 are detachably connected together, and the first concave portion 13 and the second concave portion 14 form a cavity 15. The upper cover 11 and the lower cover 12 with concave portions are assembled together to form the siphon core 7 with a cavity 15, which is more convenient for processing and production.

[0037] As shown in the appendix Figure 4As shown, a plurality of locking protrusions 16 are circumferentially and arrayedly distributed at the lower end of the upper cover 11, and a plurality of locking grooves 17 that are fitted with the locking protrusions 16 are provided at the upper end of the lower cover 12. In this embodiment, the locking protrusions 16 and the locking grooves 17 adopt a cylindrical structure, and the locking protrusions 16 are in interference fit with the corresponding locking grooves 17. Its connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0038] As shown in the Figure 4 attached drawings, an annular water retaining rib 18 is provided at the upper end of the lower cover 12, and an annular water retaining groove 19 that is fitted with the annular water retaining rib 18 is provided at the lower end of the upper cover 11. In this embodiment, the cross sections of the annular water retaining rib 18 and the annular water retaining groove 19 are triangular. The annular water retaining rib 18 and the annular water retaining groove 19 cooperate to form a water retaining structure, which can prevent external water from entering the inside of the siphon core 7, resulting in a decrease in the buoyancy of the siphon core 7.

[0039] As shown in the Figure 2 and Figure 4 attached drawings, a conical guiding portion 20 is provided at the upper end of the upper cover 11, the outer periphery of the conical guiding portion 20 is in fit with the inner periphery of the air inlet passage 8, a guiding sleeve 21 is provided at the lower end of the lower cover 12, the outer periphery of the guiding sleeve 21 is in fit with the inner periphery of the water inlet passage 2, and a water passing port 22 is provided through the side portion of the guiding sleeve 21. Both the conical guiding portion 20 and the guiding sleeve 21 can guide the siphon core 7. That is, when the siphon core 7 moves upward, the outer periphery of the conical guiding portion 20 is in fit with the inner periphery of the air inlet passage 8, and when the siphon core 7 moves downward, the outer periphery of the guiding sleeve 21 is in fit with the inner periphery of the water inlet passage 2, so that the siphon core 7 can always maintain axial movement, making the performance of the vacuum breaker 5 more reliable.

[0040] As shown in the Figure 4 attached drawings, a first annular clamping groove 23 is formed between the conical guiding portion 20 and the upper cover 11, the inner edge portion of the first gasket 9 is clamped in the first annular clamping groove 23, a second annular clamping groove 24 is formed between the guiding sleeve 21 and the lower cover 12, and the inner edge portion of the second gasket 10 is clamped in the second annular clamping groove 24. The installation structures of the first gasket 9 and the second gasket 10 are simple and reliable, and disassembly and assembly are very convenient.

[0041] As shown in the Figure 4 attached drawings, an upper cavity 25 that is communicated with the first concave portion 13 is provided inside the conical guiding portion 20, a long guiding rod 26 extending vertically is further provided at the bottom end of the lower cover 12, and a lower cavity 27 that is communicated with the second concave portion 14 is vertically provided inside the long guiding rod 26. The long guiding rod 26 and the conical guiding portion 20 are coaxially arranged. This design can further increase the buoyancy received by the siphon core 7, so that when the water inlet passage 2 is filled with water, the cooperation between the first gasket 9 and the inner end of the air inlet passage 8 is closer, ensuring that water will not flow out of the inlet passage.

[0042] As shown in the attached Figure 2 figure, the intake cover 6 is detachably mounted at the upper opening of the valve body 1 through a plurality of fasteners 28. The fasteners 28 can be screws, and a sealing ring 29 is clamped between the intake cover 6 and the valve body 1. Its connection structure is simple and reliable, very convenient for disassembly and assembly, and has good sealing performance.

Claims

1. Anti-siphon flushing valve, comprising a valve body (1), wherein a water inlet channel (2) and two water outlet channels (3) are provided on the valve body (1), and a check solenoid valve (4) is installed on the water outlet channel (3); characterized in that: It further includes a vacuum breaker (5). The vacuum breaker (5) includes an air inlet cover (6) and a siphon core (7). The air inlet cover (6) is arranged at a position corresponding to the upper part of the water inlet channel (2) of the valve body (1). An air inlet channel (8) that is communicated inside and outside is provided on the air inlet cover (6). The siphon core (7) is movably arranged between the upper end of the water inlet channel (2) and the inner end of the air inlet channel (8). A first gasket (9) and a second gasket (10) are respectively installed at the upper and lower ends of the siphon core (7). The second gasket (10) is made of an elastic material. When water flows through the water inlet channel (2), the siphon core (7) moves upward under the action of water pressure and the first gasket (9) abuts against the inner end of the air inlet channel (8) to block the air inlet channel (8). When the water inlet channel (2) stops supplying water, the siphon core (7) falls due to its own weight and the second gasket (10) abuts against the upper end face of the water inlet channel (2) to block the water inlet channel (2).

2. The anti-siphon flush valve according to claim 1, characterized in that: The second gasket (10) is made of rubber material.

3. The anti-siphon flushing valve according to claim 1, characterized in that: The siphon core (7) has a hollow structure.

4. The anti-siphon flushing valve according to claim 3, wherein: The siphon core (7) includes an upper cover (11) and a lower cover (12). A first concave portion (13) is provided at the lower end of the upper cover (11). A second concave portion (14) is provided at the upper end of the lower cover (12). The upper cover (11) and the lower cover (12) are detachably connected together, and the first concave portion (13) and the second concave portion (14) form a cavity (15).

5. The anti-siphon flush valve according to claim 4, characterized in that: A plurality of locking protrusions (16) are distributed in a circumferential array at the lower end of the upper cover (11). A plurality of locking grooves (17) that are fitted with the locking protrusions (16) are provided at the upper end of the lower cover (12). The locking protrusions (16) and the corresponding locking grooves (17) are in interference fit.

6. The anti-siphon flushing valve according to claim 5, characterized in that: An annular water retaining rib (18) is provided at the upper end of the lower cover (12). An annular water retaining groove (19) that is fitted with the annular water retaining rib (18) is provided at the lower end of the upper cover (11).

7. The anti-siphon flushing valve according to claim 4, characterized in that: A conical guiding portion (20) is provided at the upper end of the upper cover (11). The outer periphery of the conical guiding portion (20) is fitted with the inner periphery of the air inlet channel (8). A guiding sleeve (21) is provided at the lower end of the lower cover (12). The outer periphery of the guiding sleeve (21) is fitted with the inner periphery of the water inlet channel (2). A water passing port (22) is provided in a penetrating manner on the side portion of the guiding sleeve (21).

8. The anti-siphon flush valve according to claim 7, wherein: A first annular clamping groove (23) is formed between the conical guiding portion (20) and the upper cover (11). The inner edge portion of the first gasket (9) is clamped in the first annular clamping groove (23). A second annular clamping groove (24) is formed between the guiding sleeve (21) and the lower cover (12). The inner edge portion of the second gasket (10) is clamped in the second annular clamping groove (24).

9. The anti-siphon flush valve according to claim 7, characterized in that: An upper cavity (25) that is communicated with the first concave portion (13) is provided inside the conical guiding portion (20). A long guiding rod (26) extending vertically is further provided at the bottom end of the lower cover (12). A lower cavity (27) that is communicated with the second concave portion (14) is provided vertically inside the long guiding rod (26).

10. The anti-siphon flushing valve according to claim 1, characterized in that: The intake cover (6) is detachably mounted on the upper opening of the valve body (1) by a plurality of fasteners (28), and a sealing ring (29) is clamped between the intake cover (6) and the valve body (1).

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