A siphon-proof flush valve

Abstract

The present invention provides a siphon-proof flush valve, which includes a valve body and a siphon diaphragm. The valve body has a water inlet channel, a water outlet channel, and an air suction channel. The water inlet channel and the water outlet channel are connected through a water passing port, and the water outlet channel and the air suction channel are connected through an air passing port. A water stop structure is arranged on the water inlet channel, and the siphon diaphragm is arranged between the water passing port and the air passing port. In this way, the water stop structure at the front end can be effectively protected when the water flow is cut off.

Description

Technical Field

[0001] The present invention relates to the field of flush valves, and particularly to an anti-siphon flush valve. Background Art

[0002] Flush valves are widely used in toilets for flushing control. Existing flush valves generally add an anti-siphon structure to prevent sewage backflow caused by siphon. Existing anti-siphon structures are separately arranged in the water outlet channel, and only through a conventional water stop structure (such as a water stop component) can the water inlet channel and the water outlet channel be blocked. When the flushing water flow stops, the water stop structure cannot be effectively protected. Although the anti-siphon structure is added, there is still a possibility of impacting the water stop structure, which is likely to cause the dislocation or even deformation of the water stop structure and loss of the water stop function. Summary of the Invention

[0003] Therefore, to solve the above problems, the present invention provides an anti-siphon flush valve that can effectively protect the front water stop structure when the water flow stops.

[0004] To achieve the above object, the technical solution provided by the present invention is as follows:

[0005] An anti-siphon flush valve, the valve body has a water inlet channel, a water outlet channel and a suction channel, the water inlet channel and the water outlet channel are connected through a water passing port, the water outlet channel and the suction channel are connected through an air passing port, a water stop structure is arranged on the water inlet channel, and the siphon diaphragm is arranged between the water passing port and the air passing port.

[0006] Further, the water inlet channel is located at the middle position, the water outlet channel is located outside the water inlet channel, and the suction channel is located outside the water outlet channel.

[0007] Further, the valve body includes a valve housing, a water inlet pipe fitting and an outer ring member. The valve housing has an installation cavity, a water inlet and a water outlet communicating with the installation cavity. The water inlet pipe fitting, the siphon diaphragm and the outer ring member are all assembled in the installation cavity. The inner cavity of the water inlet pipe fitting is the water inlet channel and communicates with the water inlet. The outer ring member is sleeved outside the water inlet pipe fitting and encloses with the water inlet pipe fitting to form the water outlet channel, and the water outlet channel communicates with the water outlet. The water passing port is opened on the water inlet pipe fitting; the outer ring member is hermetically assembled on the inner wall of the valve housing and jointly encloses to form the suction channel. The air passing port is opened on the outer ring member. The valve housing is provided with a ventilation port communicating with the suction channel, and the siphon diaphragm is arranged between the water inlet pipe fitting and the outer ring member.

[0008] Further, the siphon diaphragm is an annular diaphragm. There are multiple water passing ports, which are evenly distributed on the outer peripheral wall of the water inlet pipe fitting; there are also multiple air passing ports, which are evenly distributed on the outer peripheral wall of the outer ring member.

[0009] Furthermore, the valve housing is provided with two installation cavities, each of which is provided with a water inlet channel, a water outlet channel and an air intake channel; the valve housing is provided with a water inlet and two water outlets, the water inlet is connected to the two water inlet channels at the same time, and the two water outlet channels are connected to different water outlets, thereby forming a one-inlet and two-outlet water outlet structure.

[0010] Furthermore, the bottoms of the two installation cavities are each provided with a water opening connected to the water inlet, and a separation protrusion is provided in the installation cavity to separate the water opening and the water outlet. The installation cavity is also provided with a water dividing piece, and the water dividing piece has a central through hole and a support arm extending radially outward. The water dividing piece is sealed and cooperated with the separation protrusion, so that the central through hole is connected to the water inlet, and the water inlet pipe is sealed and assembled in the central through hole of the water dividing piece; the support arm of the water dividing piece abuts against the inner wall of the installation cavity; and the water outlet channel is connected to the water outlet through the gap between the water dividing piece and the inner wall of the installation cavity.

[0011] Furthermore, the two air inhalation channels are simultaneously connected to one air vent.

[0012] Furthermore, the inner wall of the installation cavity is provided with an abutment step, the upper and lower ends of the outer ring member are sealed and fitted on the inner wall of the installation cavity, and the upper end of the outer ring member abuts against the abutment step to achieve positioning; the upper end of the water inlet pipe member is sealed and abutted against the outer ring member, and the lower end thereof is sealed and abutted against the water distribution member connected to the water inlet.

[0013] Furthermore, the valve body also includes a valve cover and a pressure relief valve, the valve cover is covered on the valve housing, the water-stop structure is a water-stop component, the water-stop component is connected between the valve cover and the water inlet pipe fitting to block the water inlet channel, the water-stop component and the valve cover are combined to form a back pressure cavity, the valve cover is provided with a pressure relief channel connected to the back pressure cavity, and the pressure relief valve is assembled on the valve cover and controls the on / off of the pressure relief channel.

[0014] Furthermore, the pressure relief valve includes an electric pressure relief valve and a manual pressure relief valve, the pressure relief channel has a first pressure relief waterway and a second pressure relief waterway in parallel, the electric pressure relief valve controls the on / off of the first pressure relief waterway, and the manual pressure relief valve controls the on / off of the second pressure relief waterway.

[0015] Furthermore, the manual pressure relief valve includes a first part and a second part, the first part is assembled on the second pressure relief waterway to block the second pressure relief waterway, and the first part has a first magnet; the second part can be movably arranged to approach or move away from the first part, and the second part has a second magnet. When the second part approaches the first part, the first magnet and the second magnet are attracted to drive the first part to move, thereby opening the second pressure relief waterway.

[0016] Through the technical solution provided by the present invention, the following beneficial effects are achieved:

[0017] During normal flushing, the water flow in the water inlet channel flows through the water outlet and into the water outlet channel to achieve flushing. During this process, the water flow flowing through the water outlet impacts the siphon diaphragm, causing the siphon diaphragm to deform and abut against the air passing port, thereby achieving the blocking of the air passing port.

[0018] When the water stop structure blocks the water inlet channel, the water flow is cut off, and a negative pressure is generated in the water outlet channel. At this time, the pressure in the air intake channel is greater than that in the water outlet channel, and it impacts the siphon diaphragm to deform and open the air passing port. The air flow in the air intake channel flows from the air passing port into the water outlet channel to achieve pressurization of the water outlet channel, thereby effectively achieving the anti-siphon effect. During this process, the air flow impacts the siphon diaphragm to deform, which will cause the siphon diaphragm to abut against the water passing port to block the water passing port. In this way, the water in the water outlet channel can be prevented from flowing back through the water passing port to impact the water stop structure at the front end, and the water stop structure can be well protected. Description of the Drawings

[0019] Figure 1 Shown is a three-dimensional schematic diagram of the anti-siphon flushing valve in the embodiment;

[0020] Figure 2 Shown is a cross-sectional view of the anti-siphon flushing valve in the embodiment;

[0021] Figure 3 Shown is Figure 2 an enlarged schematic diagram of area A in

[0022] Figure 4 Shown is a partial structural exploded view of the anti-siphon flushing valve in the embodiment;

[0023] Figure 5 Shown is a cross-sectional view of the structure of the valve housing in the embodiment;

[0024] Figure 6 Shown is an exploded view of the mating structure of the water inlet pipe fitting, siphon diaphragm and outer ring in the embodiment;

[0025] Figure 7 Shown is a schematic diagram of the structure of the water inlet pipe fitting in the embodiment;

[0026] Figure 8 Shown is a schematic diagram of the structure of the siphon diaphragm in the embodiment;

[0027] Figure 9 Shown is a schematic diagram of the structure of the outer ring in the embodiment;

[0028] Figure 10 Shown is a schematic diagram of the structure of the water distribution part in the embodiment. Detailed Embodiments

[0029] To further illustrate the embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Refer to Figures 1 to 10 As shown, this embodiment provides a siphon-proof flush valve, including a valve body and a siphon diaphragm 20. The valve body has a water inlet channel 101, a water outlet channel 102, and an air suction channel 103. The water inlet channel 101 and the water outlet channel 102 are connected through a water passing port 121, and the water outlet channel 102 and the air suction channel 103 are connected through an air passing port 131. A water stop structure 15 is provided on the water inlet channel 101 to block or open the water flow in the water inlet channel 101. The siphon diaphragm 20 is arranged between the water passing port 121 and the air passing port 131.

[0032] When the water stop structure 15 opens the water inlet channel 101, the water flow in the water inlet channel 101 flows into the water outlet channel 102 through the water passing port 121 to achieve flushing. During this process, the water flow flowing through the water passing port 121 impacts the siphon diaphragm 20, causing the siphon diaphragm 20 to deform and abut against the air passing port 131, thereby blocking the air passing port 131.

[0033] When the water stop structure 15 blocks the water inlet channel 101, the water flow is cut off, and a negative pressure is generated in the water outlet channel 102. At this time, the pressure in the air suction channel 103 is greater than that in the water outlet channel 102. The air flow in the air suction channel 103 impacts the siphon diaphragm 20 to deform and open the air passing port 131. The air flow in the air suction channel 103 flows into the water outlet channel 102 from the air passing port 131 to achieve pressurization of the water outlet channel 102, thereby effectively achieving the siphon-proof effect. During this process, the air flow impacts the siphon diaphragm 20 to deform, causing the siphon diaphragm 20 to abut against the water passing port 121 and block the water passing port 121. In this way, the water in the water outlet channel 102 can be blocked from flowing back through the water passing port 121 to impact the front water stop structure 15, which can well protect the water stop structure 15.

[0034] Furthermore, in this embodiment, the water inlet channel 101 is located at the middle position, the water outlet channel 102 is located outside the water inlet channel 101, and the air suction channel 103 is located outside the water outlet channel 102. With such an arrangement, the water inlet channel 101, the water outlet channel 102, and the air suction channel 103 can be arranged in the same chamber. Compared with the structure in the prior art where the water inlet channel 101 and the water outlet channel 102 are arranged in different pipe chambers, the structure of the flushing valve in this application is more compact, and the volume of the flushing valve can be greatly reduced.

[0035] Specifically, one of the more preferred specific structures for realizing the above layout is as follows: The valve body includes a valve housing 11, a water inlet pipe member 12, and an outer ring member 13. The valve housing 11 has an installation cavity 111, a water inlet 112, and a water outlet 113 that communicate with the installation cavity 111. The water inlet pipe member 12, the siphon diaphragm 20, and the outer ring member 13 are all assembled in the installation cavity 111. The inner cavity of the water inlet pipe member 12 is the water inlet channel 101 and communicates with the water inlet 112. The outer ring member 13 is sleeved outside the water inlet pipe member 12 and encloses with the water inlet pipe member 12 to form the water outlet channel 102. The water outlet channel 102 communicates with the water outlet 113, and the water passing opening 121 is opened on the water inlet pipe member 12. The outer ring member 13 is hermetically assembled on the inner wall of the valve housing 11 and jointly encloses to form the air suction channel 103. The air passing opening 131 is opened on the outer ring member 13. The valve housing 11 is provided with a ventilation opening 114 that communicates with the air suction channel 103. The siphon diaphragm 20 is arranged between the water inlet pipe member 12 and the outer ring member 13. In this way, through the cooperation of the water inlet pipe member 12 and the outer ring member 13, the layout of the water inlet channel 101, the water outlet channel 102, and the air suction channel 103 is realized, and the structure is simple.

[0036] During flushing, water flows from the water inlet 112 into the water inlet pipe member 12, and then flows outwards from the water passing opening 121 on the water inlet pipe member 12 to the water outlet channel 102. During the process of flowing outwards from the water passing opening 121, the water flow impacts the siphon diaphragm 20 outwards, causing the siphon diaphragm 20 to deform outwards and block the outer air passing opening 131. When the water flow stops, the air flow in the air suction channel 103 impacts the siphon diaphragm 20 inwards, causing the siphon diaphragm 20 to deform inwards and block the water passing opening 121, and the air flow flows into the water outlet channel 102 from the air passing opening 131.

[0037] More specifically, a plurality of water passing ports 121 are provided and evenly distributed on the outer peripheral wall of the water inlet pipe member 12; a plurality of air passing ports 131 are also provided and evenly distributed on the outer peripheral wall of the outer ring member 13, and the siphon diaphragm 20 is an annular diaphragm. In this way, when flushing, the water flowing out from the water inlet channel 101 is more uniform, and the water passing area is maximally increased to increase the water flow. Similarly, the plurality of air passing ports 131 also increase the air passing area, so that more and more sufficient air flows into the water outlet channel 102 instantaneously, and the anti-siphon effect is better.

[0038] In this embodiment, two installation cavities 111 are provided in the valve housing 11, and each installation cavity 111 is provided with a water inlet channel 101, a water outlet channel 102 and an air suction channel 103; one water inlet 112 and two water outlets 113 are provided on the valve housing 11, and the water inlet 112 communicates with the two water inlet channels 101 at the same time, and the two water outlet channels 102 communicate with different water outlets 113, thereby forming a water outlet structure of one inlet and two outlets. With such a setting, only two installation cavities 111 in the valve housing 11 are required to achieve the water outlet structure of one inlet and two outlets. Compared with the structure in the prior art where one water inlet cavity communicates with two water outlet cavities, one cavity structure can be reduced, and the overall volume is significantly reduced. Further, the two air suction channels 103 communicate with one air vent 114 at the same time. In this way, the air injection into the two water outlet channels 102 can be realized by using one air vent 114, and the structure is simple.

[0039] Specifically, water passing openings 117 communicating with the water inlet 112 are formed at the bottoms of the two installation cavities 111, and a partition protrusion 116 for separating the water passing openings 117 and the water outlets 113 is provided in the installation cavity 111. Specifically, the partition protrusion 116 has a cylindrical structure, so as to enclose the water passing openings 117, and the water outlets 113 are located outside the partition protrusion 116. A water distribution member 14 is further provided in the installation cavity 111. The water distribution member 14 has a central through hole 141 and support arms 142 extending radially outwards. The water distribution member 14 is in sealing cooperation with the partition protrusion 116, so that the central through hole 141 communicates with the water inlet 112, and the water inlet pipe member 12 is hermetically assembled in the central through hole 141 of the water distribution member 14; in this way, the water inlet channel 101 is communicated with the water inlet 112, that is, the two water inlet channels 101 communicate with one water inlet 112 at the same time. The support arms 142 of the water distribution member 14 abut against the inner wall of the installation cavity 111; the water outlet channel 102 is communicated with the water outlet 113 through the gap between the water distribution member 14 and the inner wall of the installation cavity 111. With such a setting, the specific layout structure of one inlet and two outlets is realized through the above structure, and the structure is simple and ingeniously designed.

[0040] Further, for the convenience of assembly, in this embodiment, a resisting step 115 is provided on the inner wall of the installation cavity 111. The upper and lower ends of the outer ring member 13 are hermetically attached to the inner wall of the installation cavity 111, and the upper end of the outer ring member 13 abuts against the resisting step 115 to achieve positioning. The upper end of the water inlet pipe member 12 is hermetically abutted against the outer ring member 13, and its lower end is hermetically abutted against the water distribution member 14 connected to the water inlet 112.

[0041] The specific assembly is as follows: First, the water distribution member 14 is installed, and then the outer ring member 13 is installed so that the upper end of the outer ring member 13 abuts against the resisting step 115 to achieve positioning. Then, the siphon diaphragm 20 is installed. Finally, the water inlet pipe member 12 is installed. When installing the water inlet pipe member 12, the lower end of the water inlet pipe member 12 is hermetically installed in the central through hole 141 of the water distribution member 14, and its upper end is hermetically abutted against the outer ring member 13. Specifically, the siphon diaphragm 20 is restricted between the water inlet pipe member 12 and the outer ring member 13. On the one hand, the siphon diaphragm 20 is fixed, and on the other hand, the siphon diaphragm 20 can hermetically fill the gap between the water inlet pipe member 12 and the outer ring member 13, thereby realizing the sealed cooperation between the water inlet pipe member 12 and the outer ring member 13. In this way, it has the characteristics of simple structure and convenient operation.

[0042] Further, the valve body further includes a valve cover 16 and a pressure relief valve. The valve cover 16 covers the valve housing 11. The water stop structure 15 is a water stop assembly. The water stop assembly is connected between the valve cover 16 and the water inlet pipe member 12 for blocking the water inlet channel 101. The water stop assembly and the valve cover 16 enclose a back pressure chamber 151. The valve cover 16 is provided with a pressure relief channel (not shown) communicating with the back pressure chamber 151. The pressure relief valve is assembled on the valve cover 16 and controls the opening and closing of the pressure relief channel. The water in the water inlet channel 101 will flow into the back pressure chamber 151, thereby pushing the water stop assembly to move towards the water inlet pipe member 12, and further blocking the water inlet pipe member 12 to achieve the cut-off of the water flow. When the pressure relief valve opens the pressure relief channel, the water in the back pressure chamber 151 flows out from the pressure relief channel, and the water stop assembly is pushed by the water flow in the water inlet channel 101, thereby opening the waterway.

[0043] Specifically, the pressure relief valve includes an electric pressure relief valve 17 and a manual pressure relief valve. The pressure relief channel has a first pressure relief waterway and a second pressure relief waterway connected in parallel. The electric pressure relief valve 17 controls the opening and closing of the first pressure relief waterway, and the manual pressure relief valve controls the opening and closing of the second pressure relief waterway. Such a setting can achieve electric and manual control to prevent it from being unusable when power is off.

[0044] More specifically, the manual pressure relief valve includes a first part and a second part. The first part is assembled on the second pressure relief water path to block the second pressure relief water path, and the first part has a first magnet. The second part is movably arranged to approach or move away from the first part, and the second part has a second magnet. When the second part approaches the first part, the first magnet and the second magnet attract each other to drive the first part to move, thereby opening the second pressure relief water path. With such an arrangement, the flushing is enabled by the magnetic attraction between the first magnet of the first part and the second magnet of the second part. The operator only needs to move the movable second part close to the first part, which can greatly reduce the driving force and is applicable to a wider range of people.

[0045] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all such changes are within the protection scope of the present invention.

Claims

1. A siphon-proof flush valve, characterized in that: It includes a valve body and a siphon diaphragm. The valve body has a water inlet channel, a water outlet channel, and a suction channel. The water inlet channel and the water outlet channel are connected through a water passing port, and the water outlet channel and the suction channel are connected through an air passing port. A water stop structure is provided on the water inlet channel, and the siphon diaphragm is arranged between the water passing port and the air passing port; the water inlet channel is located at the middle position, the water outlet channel is located on the periphery of the water inlet channel, and the suction channel is located on the periphery of the water outlet channel; the valve body includes a valve housing, a water inlet fitting, and an outer ring member. The valve housing has an installation cavity, a water inlet and a water outlet communicating with the installation cavity. The water inlet fitting, the siphon diaphragm, and the outer ring member are all assembled in the installation cavity. The inner cavity of the water inlet fitting is the water inlet channel and communicates with the water inlet. The outer ring member is sleeved outside the water inlet fitting and encloses with the water inlet fitting to form the water outlet channel. The water outlet channel communicates with the water outlet. The water passing port is opened on the water inlet fitting; the outer ring member is hermetically assembled on the inner wall of the valve housing and jointly encloses to form the suction channel. The air passing port is opened on the outer ring member. The valve housing is provided with a ventilation port communicating with the suction channel. The siphon diaphragm is arranged between the water inlet fitting and the outer ring member; A plurality of water passing ports are provided and are evenly distributed on the outer peripheral wall of the water inlet fitting; a plurality of air passing ports are also provided and are evenly distributed on the outer peripheral wall of the outer ring member. The siphon diaphragm is an annular diaphragm; Two installation cavities are provided in the valve housing. Each installation cavity is provided with a water inlet channel, a water outlet channel, and a suction channel; one water inlet and two water outlets are provided on the valve housing. The water inlet simultaneously communicates with the two water inlet channels, and the two water outlet channels communicate with different water outlets, thereby forming a water outlet structure of one inlet and two outlets.

2. The anti-siphon flush valve according to claim 1, characterized in that: Water passing openings communicating with the water inlet are opened at the bottoms of the two installation cavities. A partition protrusion separating the water passing opening and the water outlet is provided in the installation cavity. A water dividing member is further provided in the installation cavity. The water dividing member has a central through hole and a support arm extending radially outward. The water dividing member is in sealing cooperation with the partition protrusion, so that the central through hole communicates with the water inlet. The water inlet fitting is hermetically assembled in the central through hole of the water dividing member; the support arm of the water dividing member abuts against the inner wall of the installation cavity; the water outlet channel communicates with the water outlet through the gap between the water dividing member and the inner wall of the installation cavity.

3. The anti-siphon flush valve according to claim 1, characterized in that: A resisting step is provided on the inner wall of the installation cavity. The upper end and the lower end of the outer ring member are hermetically attached to the inner wall of the installation cavity, and the upper end of the outer ring member abuts against the resisting step to achieve positioning; the upper end of the water inlet fitting is hermetically abutted against the outer ring member, and the lower end thereof is hermetically abutted against the water dividing member connecting the water inlet.

4. The anti-siphon flush valve according to claim 1, characterized in that: The valve body further includes a valve cover and a pressure relief valve. The valve cover covers the valve housing. The water stop structure is a water stop assembly. The water stop assembly is connected between the valve cover and the water inlet fitting to block the water inlet channel. The water stop assembly and the valve cover enclose to form a back pressure cavity. The valve cover is provided with a pressure relief channel communicating with the back pressure cavity. The pressure relief valve is assembled on the valve cover and controls the on / off of the pressure relief channel.

5. The anti-siphon flush valve according to claim 4, characterized in that: The pressure relief valve includes an electric pressure relief valve and a manual pressure relief valve. The pressure relief passage has a first pressure relief waterway and a second pressure relief waterway in parallel. The electric pressure relief valve controls the on / off of the first pressure relief waterway, and the manual pressure relief valve controls the on / off of the second pressure relief waterway.

6. The anti-siphon flush valve according to claim 5, characterized in that: The manual pressure relief valve includes a first part and a second part. The first part is assembled on the second pressure relief waterway to block the second pressure relief waterway, and the first part has a first magnet; the second part is movably arranged to approach or move away from the first part, and the second part has a second magnet. When the second part approaches the first part, the first magnet attracts the second magnet to drive the first part to move, thereby opening the second pressure relief waterway.

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