Sewage backflow prevention structure of closestool and closestool

Abstract

The utility model discloses a closestool sewage backflow prevention structure and a closestool, and relates to the technical field of bathroom equipment. The sewage backflow prevention structure of the closestool comprises an air guide pipe, a sealing piece and a water blocking piece. The bottom end of the air guide pipe is communicated with the siphon, the top end of the air guide pipe is provided with a movable cavity, the bottom of the movable cavity is communicated with the bottom of the air guide pipe, and the top of the movable cavity is provided with a vent hole communicated with the negative pressure generating device so that the siphon can be communicated with the negative pressure generating device. The water blocking piece is arranged above the vent hole and shields liquid splashed out of the vent hole. The sewage backflow prevention structure is simple and reliable in overall structure, convenient to install and capable of effectively preventing sewage from flowing back into the water tank when the closestool is blocked.

Description

Technical Field

[0001] The utility model generally relates to the technical field of bathrooms, and in particular to a toilet sewage backflow prevention structure and a toilet. Background Art

[0002] Currently, some siphonic toilets are equipped with a negative pressure generator and an air duct in their tanks. The negative pressure generator is connected to the toilet's siphon drain pipe via the air duct. The negative pressure generator generates negative pressure during tank drainage, which acts on the siphon drain pipe, accelerating the siphon and improving flushing efficiency. This improved backflow prevention mechanism prevents backflow and contamination of the tank by wastewater.

[0003] Since the air duct and the sewage pipe are connected, when the toilet is clogged, the sewage and dirt in the siphon sewage elbow may flow back into the toilet tank through the air duct, thereby polluting the toilet tank.

[0004] 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

[0005] 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.

[0006] The purpose of the present utility model is to overcome at least one of the defects of the above-mentioned prior art and to provide a toilet sewage backflow prevention structure and a toilet.

[0007] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0008] A toilet sewage backflow prevention structure is configured in a toilet, the toilet comprising a water tank and a toilet seat, the toilet seat being provided with a siphon for sewage discharge, the water tank being provided with a negative pressure generating device, the toilet sewage backflow prevention structure comprising:

[0009] An air guide tube, the bottom end of which is connected to the siphon tube, the top end of which is provided with an active cavity, the bottom of which is connected to the bottom of the air guide tube, and the top of which is provided with an air vent connected to the negative pressure generating device, so as to connect the siphon tube and the negative pressure generating device; and

[0010] The water blocking member is arranged above the vent hole to block the liquid splashing out of the vent hole.

[0011] According to one embodiment of the present invention, the water-blocking component is detachably connected to the top end of the air duct, and the water-blocking component includes a connecting portion and a shielding portion. The connecting portion is detachably connected to the top end of the air duct, and a side opening is provided on the side wall of the connecting portion, and the side opening is connected to the vent hole.

[0012] According to one embodiment of the present invention, the connecting portion is tubular, and the shielding portion is substantially umbrella-shaped, with an edge portion at least partially extending beyond the connecting portion.

[0013] According to one embodiment of the present utility model, the air guide tube includes a tube body and a tube cap, the bottom of the tube body is connected to the siphon tube, the tube cap is detachably connected to the top of the tube body, the upper end of the tube cap forms a collecting chamber with a top opening, the vent is arranged on the bottom wall of the collecting chamber, and the water blocking component is installed in the collecting chamber.

[0014] According to one embodiment of the present utility model, the collecting chamber includes an assembly chamber and a reflux chamber arranged radially in parallel and interconnected, the water blocking component is installed in the assembly chamber, and the bottom of the reflux chamber has a guide slope to allow the sewage to flow downward in the direction toward the assembly chamber.

[0015] According to one embodiment of the present invention, the air guide tube also includes a tube sleeve arranged between the tube body and the tube cap, the tube sleeve is detachably connected to the top end of the tube body, the top of the tube sleeve and the bottom of the tube cap enclose the active cavity, and a guide channel connecting the tube body and the active cavity is provided in the tube sleeve.

[0016] According to one embodiment of the present invention, the seal is configured as a sealing ball, the top surface of the pipe sleeve is arranged in an arc shape, a buffer structure is provided inside the pipe sleeve, and the buffer structure includes multiple diversion plates to reduce the flow rate of sewage flowing to the vent.

[0017] According to one embodiment of the present invention, an annular limiting portion is provided on the outer wall of the pipe sleeve, the portion of the pipe sleeve above the limiting portion is inserted into the pipe cap, and the portion below the limiting portion is inserted into the pipe body.

[0018] According to one embodiment of the present invention, it also includes a movable sealing member arranged in the movable chamber, which drives the sealing member to move from a first position opening the vent hole to a second position closing the vent hole when subjected to water pressure from the siphon tube; the sealing member is configured as a sealing ball or a sealing gasket.

[0019] A toilet comprises a toilet seat and a toilet water tank, wherein the toilet seat comprises a toilet bowl and a siphon tube connected to the outlet of the toilet bowl, a negative pressure generating device is provided in the toilet water tank, and a toilet sewage backflow prevention structure as described in any one of the above items is provided between the negative pressure generating device and the siphon tube.

[0020] From the above technical solution, it can be seen that the advantages and positive effects of the toilet sewage backflow prevention structure and toilet of the utility model are:

[0021] 1. The toilet sewage backflow prevention structure provided by this utility model has a water-blocking member installed at the top of the water pipe. When the toilet is clogged, the sewage splashing out of the vent is blocked by the water-blocking member, effectively avoiding the risk of water tank contamination. The overall structure is simple, stable, and easy to disassemble and maintain.

[0022] 2. The water conduit has a movable chamber within which the seal is located. A vent at the top of the chamber connects the conduit to the negative pressure generator. If the toilet is clogged, the seal, under the impact of water pressure, blocks the vent, further preventing backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 This is a structural diagram of a toilet provided by an embodiment of the utility model;

[0025] Figure 2 yes Figure 1 A schematic diagram of the structure of the toilet anti-sewage backflow structure;

[0026] Figure 3 yes Figure 2 Schematic diagram of the structure of the airway;

[0027] Figure 4 yes Figure 3 Schematic diagram of the exploded structure of the airway;

[0028] Figure 5 This is a diagram of gas flow when the toilet is working properly;

[0029] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle;

[0030] Figure 7 This is a diagram of sewage entering the air duct when the toilet is clogged;

[0031] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle.

[0032] Icons: 100-toilet sewage backflow prevention structure; 110-air guide tube; 120-seal; 160-water blocking member; 200-toilet; 210-water tank; 211-negative pressure generating device; 220-toilet seat; 221-urinal; 222-siphon; 101-active cavity; 102-vent; 130-tube body; 140-tube sleeve; 141-limiting part; 142-block; 15 0-pipe cap; 151-collecting chamber; 152-assembly chamber; 153-reflux chamber; 154-slot; 155-first clamping part; 161-fixing column; 162-shielding part; 163-side opening; 164-edge part; 165-second clamping part; 200-toilet; 210-water tank; 211-negative pressure generating device; 220-toilet seat; 221-urinal; 222-siphon. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Example

[0037] See also Figures 1 to 5The embodiment of the present disclosure provides a toilet sewage backflow prevention structure 100, comprising an air duct 110, a sealing member 120 and a water blocking member 160. The toilet sewage backflow prevention structure 100 is used to be arranged in a toilet 200 to achieve the sewage backflow prevention effect. Specifically, the toilet 200 comprises a water tank 210 and a toilet seat 220. The toilet seat 220 is provided with a toilet bowl 221 and a siphon tube 222. The siphon tube 222 is connected to the outlet of the toilet bowl 221 for sewage discharge. A negative pressure generating device 211 is provided in the water tank 210. The negative pressure generating device 211 is connected to the air duct 110. The negative pressure generating device 211 generates negative pressure when the toilet is drained, and forms suction on the air in the siphon tube 222 through the connected air duct 110, so that the siphon tube 222 can form a siphon as soon as possible, effectively improving the sewage discharge effect of the toilet. The negative pressure generating device 211 can adopt an existing known structure, which will not be described in detail here.

[0038] In this embodiment, the bottom end of the air guide tube 110 is connected to the siphon tube 222, and an active chamber 101 is provided at the top. The bottom of the active chamber 101 is connected to the bottom of the air guide tube 110, and a vent 102 connected to the negative pressure generating device 211 is provided at the top of the active chamber 101 to connect the siphon tube 222 and the negative pressure generating device 211. The seal 120 is movably arranged in the active chamber 101. Under normal conditions, the seal 120 is located in the first position of opening the vent 102 under the action of gravity. When the siphon tube 222 is blocked, the seal 120 is subjected to the water pressure from the siphon tube 222, which pushes the seal 120 from the first position of opening the vent 102 to the second position of closing the vent 102. The water blocking member 160 is arranged above the vent 101 to block the liquid splashing out of the vent 101.

[0039] Furthermore, in one embodiment, the airway tube 110 includes a tube body 130, a tube sleeve 140, and a tube cap 150. The tube body 130 is hollow, with the bottom of the tube body 130 communicating with the siphon tube 222, and the top communicating with the tube cap 150 through the tube sleeve 140, and the tube cap 140 communicating with the negative pressure generating device 211.

[0040] The pipe sleeve 140 is detachably connected between the pipe body 130 and the pipe cap 150 . The top of the pipe sleeve 140 and the bottom of the pipe cap 150 enclose the active cavity 101 . A guide channel connecting the pipe body 130 and the active cavity 101 is provided in the pipe sleeve 140 .

[0041] Furthermore, the sealing member 120 is configured as a sealing ball 121 , and the top surface of the top of the sleeve 140 is configured in an arc shape to better support the sealing ball 121 .

[0042] Furthermore, a buffer structure is provided within the pipe sleeve 140, comprising a plurality of diverter plates 143. The diverter plates 143 divide the diversion channel of the pipe sleeve 140 into multiple, separate diversion chambers, effectively reducing the flow rate of sewage toward the vents, thereby reducing the risk of sewage from the siphon tube 222 entering the water tank. In one embodiment, the diverter plates 143 may comprise, for example, a plurality of spaced-apart sheet-like plates and a hollow cylinder connected between the plurality of sheet-like plates.

[0043] Furthermore, an annular stopper 141 is provided on the outer wall of the sleeve 140. The portion of the sleeve 140 above the stopper 141 is inserted into the cap 150, while the portion below the stopper 141 is inserted into the tube body 130. The bottom surface of the cap 150 and the top surface of the tube body 130 respectively abut against the stopper 141. The removable connection between the tube body 130, sleeve 140, and cap 150 is achieved by plugging the ends together, resulting in a simple structure and easy assembly and disassembly.

[0044] Further preferably, a clamping block 142 is provided at the upper portion of the tube sleeve 140 , and a clamping groove 154 is provided at the lower end of the tube cap 150 . The clamping block 142 and the clamping groove 154 are clamped and fixed, further improving the connection stability between the tube cap 150 and the tube sleeve 140 .

[0045] Furthermore, the lower end of the pipe cap 150 cooperates with the pipe sleeve 140 to form the active chamber 101. The upper end of the pipe cap 150 forms a collection chamber 151 with an open top. The vent 102 is provided on the bottom wall of the collection chamber 151. A water blocking member 160 is installed within the collection chamber 151. Sewage splashing out of the vent 102 is blocked by the water blocking member 160, then flows into the collection chamber 161 and back through the vent 102 to the siphon 222.

[0046] In one embodiment, the water-blocking member 160 includes a connecting portion 161 and a shielding portion 162 connected to the upper portion of the connecting portion 161. The connecting portion 161 is hollow, and a side opening 163 is formed in the side wall, connecting the vent 102 and the negative pressure generating device 211 through the side opening 163. The shielding portion 162 seals the top of the connecting portion 161 and has an edge portion 164 extending beyond the connecting portion 161. This edge portion 164 further blocks wastewater splashing out of the side opening 163. More preferably, the shielding portion 162 is generally umbrella-shaped; the curved umbrella-like structure further blocks splashing wastewater.

[0047] Furthermore, the height of the collection chamber 151 is roughly the same as the shielding portion 162 of the water-blocking member 160 to ensure the collection of sewage. The collection chamber 151 is roughly hole-shaped, including an assembly chamber 152 and a reflux chamber 153 arranged radially side by side and interconnected. The bottom of the connecting portion 161 is inserted into the assembly chamber 152 to achieve a detachable connection between the water-blocking member 160 and the pipe cap 150. Furthermore, the reflux chamber 153 is arranged above the assembly chamber 152 and has a guiding slope at its bottom to guide sewage downward toward the assembly chamber 152.

[0048] Furthermore, a first engaging portion 155 is provided on the inner sidewall of the assembly cavity 152, and a second engaging portion 165 is provided at a position corresponding to the water blocking member 160. One of the first engaging portion 155 and the second engaging portion 165 is a slot, and the other is a block, which is fixedly engaged with the slot. The provision of the block and the slot further improves the connection stability of the water blocking member 160.

[0049] This embodiment also provides a toilet, comprising a toilet seat 220, a water tank 210 and the above-mentioned toilet sewage backflow prevention structure 100. The connection method of the toilet sewage backflow prevention structure 100 with the toilet seat 220 and the water tank 210 is as described above.

[0050] The working principle of the toilet sewage backflow prevention structure 100 of this embodiment is as follows:

[0051] See also Figure 5 and Figure 6 , which shows a schematic diagram of gas flow during normal toilet operation. Under normal conditions, when the drain switch is activated, the negative pressure generating device 211 draws air in, and the air enters the negative pressure generating device 211 through the air guide tube 110. The sealing ball 121 remains drooped by its own gravity, allowing air to pass freely.

[0052] See also Figure 7 and Figure 8 , which shows a schematic diagram of wastewater entering the air duct when the toilet is clogged. When the toilet is clogged, external pressure pushes strongly into air duct 110, causing wastewater to flow back. Water enters pipe sleeve 140, which then pushes sealing ball 121, lifting it and sealing vent 102. Some wastewater rushes out of vent 102 before sealing ball 121 rises, where it is blocked again by water-blocking member 160. Furthermore, the water impacts shielding portion 162, with some flowing directly back into assembly chamber 152 and some into reflux chamber 153, which then converges downward toward assembly chamber 152 via the guiding slope at its bottom, preventing wastewater from flowing back into toilet tank 210.

[0053] It should be understood that the various examples described above can be utilized in various orientations (e.g., 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 merely as examples of effective applications of the principles of the present invention, and the present invention is not limited to any specific details of these embodiments.

[0054] 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. A toilet sewage backflow prevention structure, characterized in that: Configured in a toilet, the toilet includes a water tank and a toilet seat, the toilet seat is provided with a siphon for sewage discharge, the water tank is provided with a negative pressure generating device, the toilet sewage backflow prevention structure includes: An air guide tube, the bottom end of which is connected to the siphon tube, the top end of which is provided with an active cavity, the bottom of which is connected to the bottom of the air guide tube, and the top of which is provided with an air vent connected to the negative pressure generating device, so as to connect the siphon tube and the negative pressure generating device; and A water-blocking member is provided above the vent to block the liquid splashing out of the vent; the water-blocking member includes a connecting portion and a blocking portion, the blocking portion is located above the vent, and a side opening is provided on the side wall of the connecting portion, and the side opening is connected to the vent.

2. The toilet sewage backflow prevention structure according to claim 1, characterized in that: The water blocking member is detachably connected to the top end of the air guide tube, and the connecting portion is detachably connected to the top end of the air guide tube.

3. The toilet sewage backflow prevention structure according to claim 2, characterized in that: The connecting portion is tubular, the shielding portion is substantially umbrella-shaped, and an edge portion of the shielding portion at least partially exceeds the connecting portion.

4. The toilet sewage backflow prevention structure according to claim 1, characterized in that: The air guide tube includes a tube body and a tube cap. The bottom of the tube body is connected to the siphon tube. The tube cap is detachably connected to the top of the tube body. The upper end of the tube cap forms a collecting chamber with a top opening. The air vent is arranged on the bottom wall of the collecting chamber, and the water blocking member is installed in the collecting chamber.

5. The toilet sewage backflow prevention structure according to claim 4, characterized in that: The collecting chamber includes an assembly chamber and a reflux chamber which are arranged radially in parallel and interconnected. The water blocking member is installed in the assembly chamber. The bottom of the reflux chamber has a guiding slope to allow the sewage to flow downward toward the assembly chamber.

6. The toilet sewage backflow prevention structure according to claim 4, characterized in that: The air guide tube also includes a sleeve arranged between the tube body and the tube cap, the sleeve being detachably connected to the top end of the tube body, the top of the sleeve and the bottom of the tube cap enclosing the active cavity, and a guide channel connecting the tube body and the active cavity being provided in the sleeve.

7. The toilet sewage backflow prevention structure according to claim 6, characterized in that: The top surface of the pipe sleeve is arranged in an arc shape. A buffer structure is arranged inside the pipe sleeve. The buffer structure includes a plurality of diverter plates to reduce the flow rate of sewage flowing to the vent hole.

8. The toilet sewage backflow prevention structure according to claim 6, characterized in that: An annular limiting portion is provided on the outer wall of the pipe sleeve. The portion of the pipe sleeve located above the limiting portion is inserted into the pipe cap, and the portion below the limiting portion is inserted into the pipe body.

9. The toilet sewage backflow prevention structure according to claim 1, characterized in that: It also includes a movable sealing member arranged in the movable cavity, which drives the sealing member to move from a first position opening the vent hole to a second position closing the vent hole when subjected to water pressure from the siphon tube; the sealing member is configured as a sealing ball or a sealing gasket.

10. A toilet, characterized in that: The toilet seat comprises a toilet bowl and a siphon tube connected to the outlet of the toilet bowl. A negative pressure generating device is provided in the toilet tank. A toilet sewage backflow prevention structure as described in any one of claims 1 to 9 is provided between the negative pressure generating device and the siphon tube.

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