Anti-siphon structure of valve

Abstract

The utility model generally relates to the technical field of bathroom equipment, in particular to an anti-siphon structure of a valve, which comprises a valve body provided with a water inlet pipe forming a water inlet channel and a water outlet pipe forming a water outlet channel, and further comprises a branch water way provided with a communication port communicated with the water inlet channel. The branch water way is further provided with an air inlet communicated with the outside atmosphere. According to the utility model, the branch waterway is adopted to replace the mode of directly forming the air supplementing hole in the pipeline, and the position of the first end of the branch waterway, namely the air supplementing hole, in the water inlet channel is controlled by adjusting the length and the shape of the branch waterway, so that the structure always keeps a better anti-siphon effect, and the problem that the arrangement position of the anti-siphon structure is limited is solved. Meanwhile, the anti-siphon / anti-backflow hole and the anti-siphon / anti-backflow structure can be arranged at the non-highest point position, the whole device occupies a smaller space in height, and the structure is more compact.

Description

Technical Field

[0001] The utility model generally relates to the technical field of bathroom equipment, and in particular to an anti-siphon structure of a valve. Background Art

[0002] Since the water inlet end of the valve is usually set below the working water level, negative pressure will be generated in the water inlet pipe when the water is cut off, causing backflow, so that the toilet water will flow back into the water inlet pipe and cause pollution. Therefore, it is usually necessary to set up an anti-siphon structure to prevent backflow. One of the commonly used anti-siphon methods at present is to use an air-supply structure to balance the internal and external air pressures by opening an air-supply hole in the water inlet or outlet channel. However, this method requires prefabricated holes or on-site openings. The prefabricated holes have poor versatility and have different anti-siphon effects on pipes with different layout paths, shapes and structures. On-site openings are not conducive to equipment assembly. At the same time, a liquid leakage prevention structure is generally required at the air-supply hole. In the compact equipment space, the number of locations that can accommodate liquid leakage prevention structures is also limited. Therefore, if the anti-siphon structure is directly set on the water inlet or outlet channel, it is easy to have the problem of limited installation position.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Utility Model Content

[0004] The Summary of the Utility Model introduces a series of simplified concepts that will be further described in the Detailed Description of the Utility Model. This Summary of the Utility Model does not intend to limit the key features and essential technical features of the claimed technical solution, nor does it intend to determine the scope of protection of the claimed technical solution.

[0005] A main purpose of the present invention is to overcome at least one of the above-mentioned defects of the prior art and provide an anti-siphon structure for a valve.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0007] According to one aspect of the present invention, an anti-siphon structure of a valve is provided, including a valve body, the valve body being provided with a water inlet channel and a water outlet channel, and also including a branch water channel for introducing air to eliminate negative pressure in the water inlet channel, the first end of the branch water channel being connected to the water inlet channel, and the second end of the branch water channel being connected to the outside world.

[0008] According to one embodiment of the present invention, an anti-siphon component is provided on the branch waterway.

[0009] A siphon prevention structure for a valve includes a valve body 100, the valve body 100 is provided with a water inlet pipe 110 forming a water inlet channel 101 and a water outlet pipe 120 forming a water outlet channel 102, and also includes a branch water channel 200, the branch water channel 200 is provided with a connecting port 201 connected to the water inlet channel 101, and the branch water channel 200 is also provided with an air inlet 202 connected to the outside atmosphere.

[0010] According to one embodiment of the present invention, an anti-siphon component 300 is provided on the branch waterway 200 .

[0011] According to one embodiment of the present invention, the branch waterway 200 includes an inner waterway 210 extending inward along the water inlet pipe 110 and an outer waterway 220 extending outward along the water inlet pipe 110, the inner end of the inner waterway 210 is provided with the connecting port 201, and the outer end of the outer waterway 220 is provided with the air inlet 202; the outer waterway 220 is provided with the anti-siphon component 300.

[0012] According to one embodiment of the present invention, the branch water channel 200 is an independent pipe, or the branch water channel 200 and the water inlet pipe 110 are integrally formed.

[0013] According to one embodiment of the present invention, the inner waterway 200 is further provided with a drain port communicating with the water inlet channel 101 , and the drain port is located at the lowest point of the branch waterway 200 .

[0014] According to one embodiment of the present invention, the water inlet pipe 110 is an inverted U-shaped pipe, and the inverted U-shaped pipe has a critical water level 111 connecting the two sides of the inverted U-shaped pipe, and the connecting port 201 of the branch waterway 200 is higher than the critical water level 111; the air inlet 202 of the branch waterway 200 is lower than the highest point of the water inlet pipe 110, or the air inlet 202 of the branch waterway 200 is higher than the highest point of the water inlet pipe 110, or the air inlet 202 of the branch waterway 200 is consistent with the height of the highest point of the water inlet pipe 110.

[0015] According to one embodiment of the present invention, the branch waterway 200 is a U-shaped structure.

[0016] According to one embodiment of the present invention, the branch waterway 200 is further provided with a water outlet 203 communicating with the outside.

[0017] According to one embodiment of the present invention, the anti-siphon assembly 300 includes an anti-siphon plug 320 that can float and block the air inlet 202 , and an air-guiding gap 317 is provided between the anti-siphon plug 320 and the branch waterway 200 .

[0018] According to one embodiment of the present invention, the water outlet pipe 120 includes a main flushing pipe forming a main flushing channel 121 and a brush ring pipe forming a brush ring channel 122. The main flushing channel 121 is connected to the bottom of the toilet bowl, and the brush ring channel 122 is connected to the upper part of the toilet bowl. The valve body 100 is also provided with a switching core 130, and the water inlet channel 101 switches the water supply to the brush ring channel 122 and the main flushing channel 121 through the switching core 130.

[0019] As can be seen from the above technical solution, the advantages and positive effects of the anti-siphon structure of the valve of the present invention are: the present invention uses a branch water channel instead of directly opening an air-injection hole in the pipeline. By adjusting the length and shape of the branch water channel to control the position of the first end of the branch water channel, i.e., the air-injection hole, within the water inlet channel, the structure maintains a good anti-siphon effect, overcoming the problem of limited placement of the anti-siphon structure. Furthermore, the anti-siphon / anti-backflow hole and the anti-siphon / anti-backflow structure of the present invention can be located at a non-highest point, resulting in a smaller height space occupied by the entire device and a more compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The various objects, features, and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are merely illustrative illustrations of the present invention and are not necessarily drawn to scale. In the drawings, the same reference numerals represent the same or similar parts throughout.

[0021] Figure 1 This is a schematic diagram of an anti-siphon structure of a valve according to an exemplary embodiment of the present application. Figure 1 .

[0022] Figure 2 It is a schematic assembly diagram of an anti-siphon structure of a valve according to an exemplary embodiment of the present application.

[0023] Figure 3 It is a schematic cross-sectional structural diagram of an anti-siphon structure of a valve according to an exemplary embodiment of the present application.

[0024] Figure 4 yes Figure 3 Enlarged view of part A in .

[0025] Figure 5 This is a schematic diagram of an anti-siphon structure of a valve according to an exemplary embodiment of the present application. Figure 2 .

[0026] The description of the accompanying drawings is as follows:

[0027] 100-valve body, 101-water inlet channel, 102-water outlet channel, 103-mounting seat, 110-water inlet pipe, 111-critical water level, 120-water outlet pipe; 121-main flush channel; 122-brush ring channel; 130-switching core;

[0028] 200- branch waterway, 201- connecting port, 202- air inlet, 203- water outlet, 210- internal waterway, 220- external waterway;

[0029] 300-anti-siphon assembly, 310-siphon body, 311-cavity, 312-upper chamber, 313-outlet, 314-hole groove, 315-lower chamber, 316-chamber channel, 317-air guide gap, 318-screw hole, 319-opening, 320-anti-siphon plug, 330-siphon cover, 331-water storage buffer chamber, 333-splicing section, 334-convex buckle; 340-water retaining cover. DETAILED DESCRIPTION

[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0031] The described features, structures or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solutions of the present invention can be practiced without one or more of the specific details, or other methods, components, materials, etc. may be employed. In other cases, well-known structures, materials or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0032] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0033] like Figures 1 to 3As shown, this embodiment provides an anti-siphon structure for a valve, comprising a valve body 100, which is provided with a water inlet pipe 110 forming a water inlet channel 101 and a water outlet pipe 120 forming a water outlet channel 102, and further comprising a branch water channel 200, wherein the branch water channel 200 is provided with a communication port 201 communicating with the water inlet channel 101, and an air inlet 202 communicating with the outside atmosphere. In this embodiment, the branch water channel 200 is used instead of directly providing an air supply hole in the pipeline. By adjusting the length and shape of the branch water channel 200, the position of the air inlet 202 of the branch water channel 200 within the water inlet channel 101 is controlled, thereby achieving secondary and multiple adjustments to the position of the air inlet 202. The position of the communication port 201 of the branch water channel 200 can also be adaptively adjusted according to the different structures of the pipeline connected to the valve body 100, so that the structure always maintains a good anti-siphon effect, overcoming the problem of limited location of the anti-siphon structure. Specifically, when water is cut off in the pipe at one end of the water inlet channel 101, the water inlet channel 101 is connected to the external environment through the connecting port 201 and the air inlet 202 of the branch water channel 200, so that the air pressure remains consistent and no siphon backflow occurs in the water inlet channel 101.

[0034] In some embodiments, as Figures 2 to 4 As shown, the branch waterway 200 is provided with an anti-siphon assembly 300. It is understood that the anti-siphon assembly 300 can be an anti-siphon pad, a one-way valve, or any other existing anti-siphon structure. In this embodiment, the anti-siphon assembly 300 is provided on the external waterway 220 of the branch waterway 200. Since the air inlet 202 of the branch waterway 200 is provided on the valve body 100, the anti-siphon assembly 300 connected thereto can be directly provided on the valve body 100, without having to be provided on the pipeline following the air inlet, thus avoiding bloated and inconvenient pipeline installation. The anti-siphon assembly 300 also prevents leakage from the air inlet 202 of the branch waterway 200.

[0035] In some embodiments, as Figures 3 and 4 As shown, the branch waterway 200 includes an inner waterway 210 extending inwardly along the water inlet pipe 110 and an outer waterway 220 extending outwardly along the water inlet pipe 110. The inner end of the inner waterway 210 is provided with a communication port 201, and the outer end of the outer waterway 220 is provided with an air inlet 202. The outer waterway 220 is provided with an anti-siphon assembly 300. In this embodiment, the inner waterway 210 and the outer waterway 220 are connected and disposed along the sidewall of the water inlet channel 101.

[0036] In some embodiments, the branch waterway 200 is an independent pipe, or the branch waterway 200 is integrally formed with the water inlet pipe 110. It is understandable that when the branch waterway 200 is an independent structure, it has a larger adjustable space. In this case, the branch waterway 200 can be a special-shaped pipe with a certain strength, such as plastic, rubber, etc. When in use, the length of the branch waterway 200 can be adjusted by cutting. The connecting port 201 of the branch waterway 200 can be deep into the pipe connected to the valve body 100 to perform air induction and backflow prevention work. Figures 3 and 4 As shown, when the branch water channel 200 and the valve body 100 are integrally formed, assembly is simpler. At the same time, the integrally formed branch water channel 200 has higher strength, is not easily damaged by water flow impact, and has a more stable anti-rainbow effect.

[0037] In some embodiments, the inner waterway 200 is further provided with a drain port connected to the water inlet channel 101 , and the drain port is located at the lowest point of the branch waterway 200 .

[0038] In some embodiments, as Figures 3 and 4 As shown, the water inlet pipe 110 is an inverted U-shaped pipe having a critical water level 111 connecting the two sides of the inverted U-shaped pipe. The connecting opening 201 of the branch waterway 200 is higher than the critical water level 111. The air inlet 202 of the branch waterway 200 is lower than the highest point of the water inlet pipe 110, or the air inlet 202 of the branch waterway 200 is higher than the highest point of the water inlet pipe 110, or the air inlet 202 of the branch waterway 200 is at the same height as the highest point of the water inlet pipe 110. It is understood that when the connecting opening 201 of the branch waterway 200 is higher than the critical water level 111, the siphon effect in the branch waterway 200 connected to the water inlet pipe 110 can be enhanced when the water supply is cut off, so that the water in the branch waterway 200 is quickly discharged, and the water inlet pipe 110 is promptly connected to the outside world through the branch waterway 200, thereby eliminating negative pressure and the siphon effect. The air inlet 202 of the branch waterway 200 is lower than the highest point of the water inlet pipe 110, so as to avoid the anti-siphon structure from occupying a larger height space and facilitate its installation in the equipment.

[0039] In some embodiments, as Figures 3 and 4 As shown, the branch water channel 200 is U-shaped. It is understood that by utilizing the consistency of the liquid levels at both ends of the U-shaped tube, a water seal can be formed in the branch water channel 200, isolating the branch water channel 200 and the inner side of the water inlet pipe 110 from air oxidation under normal conditions and preventing odor from escaping from the water inlet pipe 110 or the valve body 100.

[0040] In some embodiments, as Figure 5As shown, branch waterway 200 is further provided with an outlet 203 communicating with the outside world. It is understood that water within branch waterway 200 can flow out through the siphon effect of water inlet pipe 110 or through third-end outlet 203. Furthermore, water flowing out of outlet 203 can be used to replenish the toilet water seal or the foam shield, thereby enhancing the functionality of the anti-siphon structure.

[0041] In some embodiments, as Figures 2 to 4 As shown, the anti-siphon assembly 300 includes an anti-siphon plug 320 that can float and block the air inlet 202 , and an air-guiding gap 317 is defined between the anti-siphon plug 320 and the branch waterway 200 .

[0042] Specifically, such as Figures 2 to 4 As shown, the anti-siphon assembly 300 includes a siphon body 310, which is provided with a cavity 311 connected to the connecting port 201 of the branch waterway 200, an outlet 313 is provided at the upper part of the cavity 311, an anti-siphon plug 320 is provided in the cavity 311, and the anti-siphon plug 320 that can float and block the outlet 313 is provided. An air guide gap 317 is provided between the anti-siphon plug 320 and the cavity 311.

[0043] When water is flowing, water flows into branch waterway 200, causing anti-siphon plug 320 to float upward, thereby sealing outlet 313 and preventing leakage. When water is blocked, water in branch waterway 200 is siphoned out by water inlet pipe 110, causing anti-siphon plug 320 to sink, thereby opening outlet 313. An air guide gap 317 is left between anti-siphon plug 320 and cavity 311. Consequently, when water is blocked, outside air can be exhausted to water inlet pipe 110 through outlet 313, cavity 311, air guide gap 317, and branch waterway 200, preventing siphoning caused by negative pressure when water is blocked inlet pipe 110. This arrangement reduces the overall size of the valve, effectively reducing the internal space occupied by the valve.

[0044] like Figures 2 to 4 As shown, a water storage buffer chamber 331 is provided above the outlet 313 of the siphon body 310. This water storage buffer chamber 331 is provided with an air inlet 202 that communicates with the outside world. It will be appreciated that it takes a while for the floating anti-siphon plug 320 to completely seal the outlet 313, during which time liquid may flow out of the outlet 313 and cause leakage. Therefore, in this embodiment, the water storage buffer chamber 331 is added to store this accumulated water and prevent leakage. When the water inlet pipe 110 siphons water from the branch waterway 200, the accumulated water in the water storage buffer chamber 331 is also sucked out.

[0045] like Figures 2 to 4As shown, the siphon body 310 is provided with an opening 319 at the top, a siphon cover 330 is spliced ​​at the opening 319, and a water storage buffer chamber 331 is provided in the siphon cover 330. It can be understood that the siphon body 310 and the water storage buffer chamber 331 adopt a component combination structure, which facilitates the installation and production of the anti-siphon plug 320 inside the siphon body 310. In this embodiment, a water retaining cover 340 is assembled on the top of the siphon cover 330, and a splicing section 333 is provided at the bottom of the siphon cover 330. During assembly, the splicing section 333 is fitted into the opening 319 of the siphon body 310, and the protruding buckles 334 provided on both sides of the splicing section 333 are snap-fitted with the corresponding hole grooves 314 provided on the siphon body 310, so that the siphon cover 330 and the siphon body 310 are fixedly connected together.

[0046] In some embodiments, as Figures 2 to 4 As shown, the valve body 100 is provided with a mounting seat 103 for mounting the siphon body 310. It will be appreciated that to facilitate the installation of the anti-siphon assembly 300 and the manufacture of the valve body 100, the anti-siphon assembly 300 and the valve body 100 are assembled into a modular structure. The mounting seat 103 provided on the valve body 100 for mounting the siphon body 310 reduces the installation difficulty of the siphon body 310 and improves assembly efficiency. In this embodiment, after the siphon body 310 is inserted into the mounting seat 103, the siphon body 310 and one side of the mounting seat 103 are locked and secured using bolts through pre-set screw holes 318.

[0047] In some embodiments, as Figures 3 and 4 As shown, the cavity 311 of the siphon body 310 includes an upper chamber 312 and a lower chamber 315. The lower chamber 315 communicates with the connection port 201 of the branch waterway 200. The anti-siphon plug 320 is disposed within the upper chamber 312. A chamber passage 316 connects the upper and lower chambers 312 and 315. It will be appreciated that the provision of the lower chamber 315 prevents water entering the branch waterway 200 from directly impacting the anti-siphon plug 320, thereby protecting the anti-siphon plug 320. Furthermore, a third outlet 203 can be provided on one side of the lower chamber 315 for added functionality.

[0048] In some embodiments, as Figure 1 As shown, the water outlet pipe 120 includes a main flushing pipe forming a main flushing channel 121 and a brush ring pipe forming a brush ring channel 122. The main flushing channel 121 is connected to the bottom of the toilet bowl, and the brush ring channel 122 is connected to the upper part of the toilet bowl. The valve body 100 is also provided with a switching core 130. The water inlet channel 101 switches the water supply to the brush ring channel 122 and the main flushing channel 121 through the switching core 130.

[0049] It should be understood that the various examples described above can be utilized in various orientations, such as tilted, inverted, horizontal, vertical, etc., and in various configurations without departing from the principles of the present invention. The embodiments shown in the accompanying drawings are shown and described only as examples of effective application of the principles of the present invention, and the present invention is not limited to any specific details of these embodiments.

[0050] Of course, once the above description of the representative embodiments is carefully considered, it will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, and other changes may be made to these specific embodiments, and that these changes are within the scope of the principles of the present invention. Therefore, the foregoing detailed description should be clearly understood to be given by way of illustration and example only, and the spirit and scope of the present invention shall be limited only by the appended claims and their equivalents.

Claims

1. An anti-siphon structure for a valve, comprising a valve body (100), wherein the valve body (100) is provided with a water inlet pipe (110) forming a water inlet channel (101) and a water outlet pipe (120) forming a water outlet channel (102), characterized in that: It also includes a branch waterway (200), wherein the branch waterway (200) is provided with a communication port (201) connected to the water inlet channel (101), and the branch waterway (200) is also provided with an air inlet (202) connected to the outside atmosphere.

2. The anti-siphon structure of the valve according to claim 1, characterized in that: An anti-siphon component (300) is provided on the branch waterway (200).

3. The anti-siphon structure of the valve according to claim 2, characterized in that: The branch waterway (200) comprises an inner waterway (210) extending inwardly along the water inlet pipe (110) and an outer waterway (220) extending outwardly along the water inlet pipe (110); the inner end of the inner waterway (210) is provided with the communication port (201), and the outer end of the outer waterway (220) is provided with the air inlet (202); and the outer waterway (220) is provided with the anti-siphon assembly (300).

4. The anti-siphon structure of a valve according to claim 3, characterized in that: The branch water channel (200) is an independent pipe, or the branch water channel (200) and the water inlet pipe (110) are integrally formed.

5. The anti-siphon structure of the valve according to claim 3, characterized in that: The inner waterway (210) is further provided with a drain port communicating with the water inlet channel (101), and the drain port is located at the lowest point of the branch waterway (200).

6. The anti-siphon structure of a valve according to claim 1, characterized in that: The water inlet pipe (110) is an inverted U-shaped pipe, and the inverted U-shaped pipe has a critical water level (111) connecting the two sides of the inverted U-shaped pipe. The connecting port (201) of the branch waterway (200) is higher than the critical water level (111); the air inlet (202) of the branch waterway (200) is lower than the highest point of the water inlet pipe (110), or the air inlet (202) of the branch waterway (200) is higher than the highest point of the water inlet pipe (110), or the air inlet (202) of the branch waterway (200) is at the same height as the highest point of the water inlet pipe (110).

7. The anti-siphon structure of a valve according to claim 1, characterized in that: The branch waterway (200) has a U-shaped structure.

8. The anti-siphon structure of a valve according to claim 1, wherein: The branch waterway (200) is also provided with a water outlet (203) communicating with the outside.

9. The anti-siphon structure of a valve according to claim 2, characterized in that: The anti-siphon assembly (300) comprises an anti-siphon plug (320) capable of floating and blocking the air inlet (202), and an air-guiding gap (317) is provided between the anti-siphon plug (320) and the branch waterway (200).

10. The anti-siphon structure of a valve according to claim 1, wherein: The water outlet pipe (120) includes a main flushing pipe forming a main flushing channel (121) and a brush ring pipe forming a brush ring channel (122). The main flushing channel (121) is connected to the bottom of the toilet bowl, and the brush ring channel (122) is connected to the upper part of the toilet bowl. The valve body (100) is also provided with a switching core (130). The water inlet channel (101) switches the water supply to the brush ring channel (122) and the main flushing channel (121) through the switching core (130).

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