Toilet overflow device, toilet tank and toilet

Abstract

The present invention provides a toilet overflow device, a toilet water tank and a toilet. The toilet overflow device is sealed and connected to an overflow pipe in the toilet water tank, and comprises: a sealing part, which can seal and cover the first open end of the overflow pipe; a pressure relief part, which seals and cooperates with the sealing part, and the pressure relief part is configured to separate from the sealing part under the action of the first liquid buoyancy in the toilet water tank, so that external gas enters the overflow pipe; and under the action of the second liquid buoyancy in the toilet water tank, the sealing part is linked to separate from the first open end. The toilet overflow device, toilet water tank and toilet of the present invention can solve the problem of liquid leakage in the toilet water tank, and the structure is compact, and the opening force required to open the overflow pipe is smaller.

Description

Technical Field

[0001] The present invention relates to the technical field of overflow water seals, and in particular to a toilet overflow device, a toilet water tank and a toilet. Background Art

[0002] Currently, squat toilets with pre-stored water in connecting pipes are available on the market. The connecting pipe is isolated from the outside air by sealing the overflow port, and a water seal is provided at the connection to the squat toilet to achieve pre-stored water in the connecting pipe. The pre-stored water in the connecting pipe reduces water flow loss to a certain extent, enhances flushing performance, but also brings about overflow problems.

[0003] The existing problems are as follows: in order to overcome the opening pressure caused by the negative pressure in the connecting pipe, a larger float is needed to open the connecting pipe. Due to the limited space in the squat toilet tank, it is difficult to install a larger float. Summary of the invention

[0004] The purpose of the present invention is to provide a toilet overflow device, a toilet water tank and a toilet, which can solve the problem of liquid leakage in the toilet water tank, have a compact structure, and require a small opening force to open the overflow pipe.

[0005] The present invention can be implemented by adopting the following technical solutions.

[0006] The present invention provides a toilet overflow device, which is sealed and connected to an overflow pipe in a toilet water tank, and comprises:

[0007] A sealing portion, which can seal and cover the first open end of the overflow pipe;

[0008] The pressure relief part is sealed with the sealing part. The pressure relief part is configured to separate from the sealing part under the action of the first liquid buoyancy in the toilet tank so that external gas can enter the overflow pipe; and under the action of the second liquid buoyancy in the toilet tank, the sealing part is linked to separate from the first opening end.

[0009] In an embodiment of the present invention, the sealing portion is provided with at least one pressure relief hole, and the pressure relief portion is provided with at least one blocking column, and the blocking column is sealingly matched with the pressure relief hole.

[0010] In an embodiment of the present invention, a cross-sectional area of ​​at least one of the pressure relief holes is smaller than a cross-sectional area of ​​the first opening end.

[0011] In an embodiment of the present invention, a sealing gasket is provided on the end surface where the pressure relief portion cooperates with the sealing portion, and the sealing gasket is arranged around the outer periphery of at least one of the blocking columns.

[0012] In an embodiment of the present invention, at least one linkage structure is provided between the pressure relief portion and the sealing portion, and the linkage structure is configured to enable the pressure relief portion to drive the sealing portion to separate from the first opening end under the action of the buoyancy of the second liquid.

[0013] In an embodiment of the present invention, the linkage structure includes a guide column arranged on the sealing part, and a guide hole arranged on the pressure relief part, the guide column is passed through the guide hole, and a limit piece is provided at the top end of the guide column passing through the guide hole, and the diameter of the limit piece is larger than the outer diameter of the guide hole.

[0014] In an embodiment of the present invention, the toilet overflow device further comprises a float, and the float is sleeved on the overflow pipe and connected to the pressure relief part.

[0015] In an embodiment of the present invention, a guide structure is provided between the buoy and the overflow pipe, and the guide structure comprises at least one guide rib and at least one guide groove, and the guide rib can be inserted into the guide groove.

[0016] In an embodiment of the present invention, at least one of the guide ribs is arranged on the outer circumferential wall of the overflow pipe, and at least one of the guide grooves is arranged on the inner circumferential wall of the float; or, at least one of the guide ribs is arranged on the inner circumferential wall of the float, and at least one of the guide grooves is arranged on the outer circumferential wall of the overflow pipe.

[0017] In an embodiment of the present invention, the float comprises a sleeve body and a float connected to the sleeve body. The sleeve body is sleeved outside the overflow pipe and can be connected to the pressure relief part.

[0018] In an embodiment of the present invention, the inner diameter of the overflow pipe is 28 mm to 32 mm.

[0019] In an embodiment of the present invention, the diameter of the pressure relief hole is 5 mm to 10 mm.

[0020] In an embodiment of the present invention, the opening height of the sealing portion is greater than or equal to 18 mm.

[0021] The present invention also provides a toilet water tank, comprising the toilet overflow device as described above.

[0022] The present invention also provides a toilet, comprising the toilet water tank as described above.

[0023] The characteristics and advantages of the present invention are:

[0024] 1. The toilet overflow device of the present invention realizes pressure relief of the overflow pipe by setting a pressure relief part, thereby providing a guarantee for the smooth opening of the sealing part, so that the sealing part can be separated from the first open end of the overflow pipe under the action of a relatively small opening force. The present invention first realizes the connection between the overflow pipe and the external environment under the action of the first liquid buoyancy, so as to smoothly relieve the negative pressure in the overflow pipe, so that the sealing part can be smoothly opened under the action of the second liquid buoyancy, and the second liquid buoyancy is smaller than the liquid buoyancy of the sealing cover only set at the first open end of the overflow pipe in the prior art for opening the sealing cover. The opening force of the present invention is smaller, and the structure is easier to achieve miniaturization.

[0025] 2. The toilet tank and toilet of the present invention can not only effectively avoid the problem of liquid leakage in the toilet tank, that is, prevent the problem of liquid accumulation in the water tank that cannot be discharged smoothly due to damage to the water inlet valve, but also can increase the flushing force of the toilet through the drainage of the overflow pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a structural schematic diagram of the toilet overflow device of the present invention in a closed overflow pipe state.

[0028] Figure 2 It is a structural schematic diagram of the toilet overflow device of the present invention in a pressure relief state.

[0029] Figure 3 It is a structural schematic diagram of the toilet overflow device of the present invention in an open state.

[0030] Figure 4 It is a cross-sectional view of the toilet overflow device of the present invention.

[0031] Figure 5 It is a structural schematic diagram of the sealing part and the pressure relief part of the toilet overflow device of the present invention in a separated state.

[0032] Figure 6 It is a schematic diagram of the structure of the toilet water tank of the present invention, wherein the toilet overflow device is in a state of closing the overflow pipe.

[0033] Figure 7 It is a structural schematic diagram of the overflow pipe of the toilet water tank of the present invention in a pressure relief state.

[0034] Figure 8It is a structural schematic diagram of the overflow pipe of the toilet water tank of the present invention in an overflowing state.

[0035] Fig. 9 It is a schematic structural diagram of a toilet according to the present invention.

[0036] Reference numerals and descriptions:

[0037] 1. Toilet water tank; 11. Inner cavity; 12. Drain valve; 121. Water outlet; 13. Water outlet end; 2. Overflow pipe; 21. First opening end; 22. Second opening end; 23. Guide rib; 3. Sealing part; 31. First sealing gasket; 32. Pressure relief hole; 33. Protrusion; 4. Pressure relief part; 41. Blocking column; 42. Second sealing gasket; 5. Linking structure; 51. Guide column; 52. Guide hole; 53. Limiting member; 6. Float; 61. Sleeve body; 62. Float; 63. Guide groove; 621. Hollow ring cavity; 7. Toilet body; 71. Water seal elbow; 72. Connecting pipe; 8. Guide structure; 10. Toilet overflow device. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "at least one" means one or more, and "a plurality of" means two or more. The use of the term "may" here is intended to indicate that any attribute described in "may" is optional.

[0040] Implementation Method 1

[0041] The present invention proposes a toilet overflow device, which is sealed and connected to an overflow pipe 2 located in a toilet water tank 1, and includes a sealing portion 3 and a pressure relief portion 4, wherein: the sealing portion 3 can seal a cover disposed on a first open end 21 of the overflow pipe 2; the pressure relief portion 4 is sealed and cooperated with the sealing portion 3, and the pressure relief portion 4 is configured to detach from the sealing portion 3 under the action of the first liquid buoyancy in the toilet water tank 1, so as to allow external gas to enter the overflow pipe 2; and under the action of the second liquid buoyancy in the toilet water tank 1, the sealing portion 3 is linked to detach from the first open end 21.

[0042] The toilet overflow device of the present invention realizes the pressure relief of the overflow pipe 2 by setting the pressure relief part 4, thereby providing a guarantee for the smooth opening of the sealing part 3, so that the sealing part 3 can be separated from the first open end 21 of the overflow pipe 2 under the action of a relatively small opening force. The present invention first realizes the connection between the overflow pipe 2 and the external air environment under the action of the first liquid buoyancy, so as to smoothly relieve the negative pressure in the overflow pipe 2, so that the sealing part 3 can be smoothly opened under the action of the second liquid buoyancy, wherein the second liquid buoyancy is greater than the first liquid buoyancy, and the second liquid buoyancy is less than the liquid buoyancy of the sealing cover only provided at the first open end 21 of the overflow pipe 2 in the prior art for opening the sealing cover. The opening force of the present invention is smaller, and the structure is easier to realize miniaturization.

[0043] It should be noted here that the magnitude of the force F1 for opening the pressure relief part 4 and the magnitude of the force F2 for opening the sealing part 3 may be the same or different. Those skilled in the art can calculate or design according to the specific structures of the pressure relief part 4 and the sealing part 3, and the magnitudes of the force F1 and the force F2 are not limited here.

[0044] Specifically, the overflow pipe 2 is generally in the shape of a straight pipe, and has a first open end 21 and a second open end 22. Figures 6 to 8 As shown, the first open end 21 of the overflow pipe 2 is used to be connected to the toilet overflow device 10 of the present invention, and the second open end 22 of the overflow pipe 2 is connected to the water outlet 121 of the drain valve 12 arranged in the toilet water tank 1 and is jointly connected to the water outlet end 13 of the toilet water tank 1.

[0045] like Figures 1 to 5 As shown, the sealing portion 3 of the overflow device of the toilet is generally in the shape of a flat plate, which can be sealed and attached to the first open end 21 of the overflow pipe 2, and a first sealing gasket 31 is provided between the sealing portion 3 and the first open end 21 of the overflow pipe 2, which is used to improve the sealing performance of the sealing portion 3 to the first open end 21 of the overflow pipe 2. In this embodiment, the sealing portion 3 is formed with a convex portion 33 that can extend into the first open end 21 of the overflow pipe 2, and the convex portion 33 is provided with an annular groove, which can be used to accommodate the first sealing gasket 31, so as to facilitate the combination of the first sealing gasket 31 and the sealing portion 3.

[0046] The pressure relief part 4 of the overflow device of the toilet is located above the sealing part 3, which can be sealed and connected to the sealing part 3 and can be opened from the sealing part 3 to achieve the communication between the overflow pipe 2 and the external air. The pressure relief part 4 is generally in the shape of a flat plate.

[0047] In an embodiment of the present invention, in order to realize the combination of the sealing part 3 and the pressure relief part 4 , the sealing part 3 is provided with at least one pressure relief hole 32 , and the pressure relief part 4 is provided with at least one blocking column 41 , and the blocking column 41 is sealed and matched with the pressure relief hole 32 .

[0048] In a feasible embodiment, a pressure relief hole 32 is opened in the middle of the sealing part 3 and passes through the upper and lower sides of the sealing part 3. The pressure relief part 4 has a blocking column 41, which can extend into the pressure relief hole 32 to realize the combination of the pressure relief part 4 and the sealing part 3.

[0049] Furthermore, in order to improve the tightness of the connection between the pressure relief part 4 and the sealing part 3 and prevent air leakage, the end surface of the pressure relief part 4 and the sealing part 3 is provided with a second sealing gasket 42, and the second sealing gasket 42 is arranged around the outer periphery of the blocking column 41. In this embodiment, an annular groove is provided on the blocking column 41, which can be used to accommodate the second sealing gasket 42, so as to facilitate the combination of the second sealing gasket 42 and the pressure relief part 4.

[0050] In another feasible embodiment, a plurality of pressure relief holes 32 penetrating through the upper and lower sides of the sealing portion 3 may be opened on the sealing portion 3, and a plurality of blocking columns 41 may be provided on the pressure relief portion 4. The blocking columns 41 are opposite to the pressure relief holes 32 and the number of the two is the same, so that when the pressure relief portion 4 is covered on the sealing portion 3, the blocking columns 41 can be inserted into the pressure relief holes 32 to realize the combination of the pressure relief portion 4 and the sealing portion 3.

[0051] Furthermore, in order to improve the tightness of the connection between the pressure relief part 4 and the sealing part 3 and prevent air leakage, the end surface where the pressure relief part 4 cooperates with the sealing part 3 is provided with a second sealing gasket 42, and the second sealing gasket 42 can be arranged around the outer periphery of multiple blocking columns 41 to improve the sealing performance.

[0052] According to one embodiment of the present invention, the cross-sectional area of ​​the at least one pressure relief hole 32 is smaller than the cross-sectional area of ​​the first open end 21 .

[0053] Specifically, when the sealing portion 3 has only one pressure relief hole 32 , the cross-sectional area of ​​the pressure relief hole 32 is smaller than the cross-sectional area of ​​the first opening end 21 ; when the sealing portion 3 has multiple pressure relief holes 32 , the sum of the cross-sectional areas of the multiple pressure relief holes 32 is smaller than the cross-sectional area of ​​the first opening end 21 .

[0054] The present invention designs the cross-sectional area of ​​at least one pressure relief hole 32 to be smaller than the cross-sectional area of ​​the first opening end 21, so that the present invention can smoothly open the pressure relief part 4 under the action of the relatively small buoyancy of the first liquid, thereby achieving the effect of relieving the negative pressure in the overflow pipe 2. After the overflow pipe 2 is free of negative pressure, it is easier to open the sealing part 3, which saves effort and achieves the advantage of miniaturization.

[0055] According to one embodiment of the present invention, Figure 4 and Figure 5As shown, at least one linkage structure 5 is provided between the pressure relief part 4 and the sealing part 3, and the linkage structure 5 is configured to enable the pressure relief part 4 to drive the sealing part 3 to separate from the first opening end 21 under the action of the buoyancy of the second liquid. The linkage structure 5 provides a linkage guide for the pressure relief part 4 to drive the sealing part 3 to separate from the first opening end 21.

[0056] Specifically, the linkage structure 5 includes a guide column 51 arranged on the sealing part 3, and a guide hole 52 arranged on the pressure relief part 4. The guide column 51 is passed through the guide hole 52. A limit piece 53 is provided at the top end of the guide column 51 passing through the guide hole 52. The diameter of the limit piece 53 is larger than the outer diameter of the guide hole 52.

[0057] When the pressure relief part 4 opens from the sealing part 3 under the action of the first liquid buoyancy, the pressure relief part 4 will move upward along the guide column 51. When the pressure relief part 4 moves up to the limit member 53, due to the obstruction of the limit member 53 and as the liquid buoyancy increases to the second liquid buoyancy, the pressure relief part 4 will drive the limit member 53 to move upward together, and then drive the guide column 51 and the sealing part 3 connected thereto to move upward until the sealing part 3 is separated from the first opening end 21 of the overflow tube 2.

[0058] According to one embodiment of the present invention, the toilet overflow device further comprises a float 6 , which is sleeved on the overflow pipe 2 and connected to the pressure relief part 4 .

[0059] Specifically, the float 6 is generally annular and cylindrical, and is movably sleeved outside the overflow pipe 2. The float 6 has a sleeve body 61 and a float 62 connected to the sleeve body 61. The sleeve body 61 is sleeved outside the overflow pipe 2 and can be connected to the pressure relief part 4. The float 62 forms a hollow annular cavity 621, so that the float 6 can smoothly move up and down on the overflow pipe 2 under the action of the buoyancy of the liquid. In this embodiment, the sleeve body 61 can be composed of a plurality of connecting plates, which are arranged at intervals along the circumferential direction and connected between the float 62 and the pressure relief part 4, so as to realize the linkage effect of the float 6 driving the pressure relief part 4.

[0060] In order to enable the float 6 to move smoothly on the overflow pipe 2 , a guide structure 8 is provided between the float 6 and the overflow pipe 2 . The guide structure 8 includes at least one guide rib 23 and at least one guide groove 63 . The guide rib 23 can be inserted into the guide groove 63 .

[0061] In a feasible embodiment of the present invention, at least one guide rib 23 is disposed on the outer peripheral wall of the overflow pipe 2 , and at least one guide groove 63 is disposed on the inner peripheral wall of the buoy 6 .

[0062] Specifically, at least one guide rib 23 is provided on the overflow pipe 2 , and at least one guide groove 63 is provided on the inner ring wall of the float 62 , and the guide rib 23 can be inserted into the guide groove 63 .

[0063] In this embodiment, two guide ribs 23 are radially opposite to each other on the outer wall of the overflow pipe 2 , and two guide grooves 63 are provided on the inner annular wall of the float 62 , so as to improve the movement stability of the float 6 on the overflow pipe 2 .

[0064] In another feasible embodiment of the present invention, at least one guide rib 23 is provided on the inner peripheral wall of the buoy 6, and at least one guide groove 63 is provided on the outer peripheral wall of the overflow pipe 2. Basically the same as the above embodiment, in this embodiment, only the setting positions of the guide groove 63 and the guide rib 23 are interchanged, and the specific structure is not repeated.

[0065] In the present invention, in order to ensure normal overflow capacity, the inner diameter of the overflow pipe 2 is 28mm to 32mm. In order to ensure sufficient air intake and the size of the float 6 can meet the requirements of the toilet tank and the safety water level, the diameter of the pressure relief hole 32 is 5mm to 10mm. In addition, in order to ensure sufficient overflow area, the opening height of the sealing part 3 is greater than or equal to 18mm.

[0066] The working process of the toilet overflow device of the present invention is as follows:

[0067] like Figure 1 As shown, in the initial state, the sealing part 3 is sealed with the first open end 21 of the overflow pipe 2 through the first sealing gasket 31, the sealing column 41 of the pressure relief part 4 is inserted into the pressure relief hole 32 and the pressure relief part 4 and the sealing part 3 are sealed through the second sealing gasket 42; in the initial state, due to the negative pressure in the overflow pipe 2, the sealing part 3, the first sealing gasket 31, the pressure relief part 4 (mainly its sealing column 41), and the second sealing gasket 42 are all subjected to negative pressure, thereby achieving the sealing of the first open end 21 of the overflow pipe 2 and the pressure relief hole 32.

[0068] like Figure 2 and Figure 7 As shown, when the working water level in the toilet tank 1 rises, the buoyancy of the float 6 gradually increases. When the buoyancy is greater than the negative pressure exerted on the blocking column 41 and the second sealing gasket 42, the pressure relief hole 32 is opened, and the outside air enters the overflow pipe 2, and the pressure in the overflow pipe 2 is relieved. At this time, the overflow pipe 2 is no longer affected by the negative pressure.

[0069] like Figure 3 and Figure 8 As shown, as the water level of the toilet tank 1 continues to rise, when the buoyancy of the float 6 is greater than the gravity of the toilet overflow device, the float 6 continues to move upward, thereby pushing the pressure relief part 4 to move upward. Under the action of the linkage structure 5, the pressure relief part 4 drives the sealing part 3 covered at the first open end 21 of the overflow pipe 2 to move upward, thereby realizing the opening of the first open end 21 of the overflow pipe 2. When the water level of the toilet tank 1 rises to the first open end 21 of the overflow pipe 2, the overflow function is realized.

[0070] The toilet overflow device of the present invention uses the pilot principle to open a pressure relief hole 32 on the sealing part 3, and the buoyancy of the float 6 only needs to overcome the negative pressure of the pressure relief hole 32. The float 6 can be designed to be smaller, and its structure is compact and easy to implement.

[0071] Implementation Method 2

[0072] like Figures 1 to 8 As shown, the present invention further provides a toilet tank 1, comprising the toilet overflow device 10 as described in Embodiment 1. The specific structure, working principle, and beneficial effects of the toilet overflow device 10 have been specifically described in Embodiment 1 and will not be repeated here.

[0073] Specifically, the toilet tank 1 includes an inner cavity 11 for accommodating liquid, in which a drain valve 12 and an overflow pipe 2 are provided, and the toilet overflow device 10 is connected to a first open end 21 of the overflow pipe 2 .

[0074] Figure 6 The figure shows a schematic diagram of the structure of the liquid in the toilet tank 1 at the working water level. At this time, the sealing part 3 of the toilet overflow device 10 is sealed to the first open end 21 of the overflow pipe 2, and the pressure relief part 4 is blocked on the sealing part 3. The overflow pipe 2 is not connected to the inner cavity 11 of the toilet tank 1. Figure 7 As shown, when the liquid in the toilet water tank 1 rises to the overflow water level, the toilet overflow device 10, under the action of the buoyancy of the first liquid received by the float 6, pushes the pressure relief part 4 to rise, thereby causing the blocking column 41 of the pressure relief part 4 to separate from the pressure relief hole 32 of the sealing part 3, and the outside air enters the overflow pipe 2, thereby achieving the effect of removing the negative pressure in the overflow pipe 2; as the liquid in the toilet water tank 1 continues to rise, the float 6 drives the pressure relief part 4 to rise, thereby driving the sealing part 3 to rise, thereby achieving the purpose of smoothly opening the first opening end 21 of the overflow pipe 2, please see Figure 8 shown.

[0075] The toilet water tank 1 of the present invention can effectively realize the overflow of the liquid in the water tank, and can prevent the problem of liquid accumulation and leakage in the water tank due to damage of the water inlet valve.

[0076] Implementation Method 3

[0077] like Figures 1 to 9 As shown, the present invention further provides a toilet, including the toilet water tank 1 described in Embodiment 2. The specific structure, working principle, and beneficial effects of the toilet water tank 1 have been specifically described in Embodiment 2 and will not be repeated here.

[0078] The toilet has a toilet body 7, and the toilet body 7 is connected to the overflow pipe 2 in the toilet water tank 1 through a connected water seal elbow 71 and a connecting pipe 72, so as to achieve the purpose of water discharge of the overflow pipe 2.

[0079] The toilet of the present invention can not only effectively realize the overflow of the liquid in the toilet tank 1 and prevent the problem of liquid accumulation and leakage in the toilet tank 1 due to damage of the water inlet valve, but also can increase the flushing force on the toilet body 7 through the drainage of the overflow pipe 2.

[0080] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A toilet overflow device, characterized in that: The toilet overflow device is sealed and connected to an overflow pipe located in the toilet water tank, and comprises: A sealing portion, which can seal and cover the first open end of the overflow pipe; The pressure relief part is sealed with the sealing part. The pressure relief part is configured to separate from the sealing part under the action of the first liquid buoyancy in the toilet tank so that external gas can enter the overflow pipe; and under the action of the second liquid buoyancy in the toilet tank, the sealing part is linked to separate from the first opening end.

2. The toilet overflow device according to claim 1, characterized in that: The sealing portion is provided with at least one pressure relief hole, and the pressure relief portion is provided with at least one blocking column, and the blocking column is sealed and matched with the pressure relief hole.

3. The toilet overflow device according to claim 2, characterized in that: A cross-sectional area of ​​at least one of the pressure relief holes is smaller than a cross-sectional area of ​​the first opening end.

4. The toilet overflow device according to claim 1, characterized in that: At least one linkage structure is provided between the pressure relief portion and the sealing portion, and the linkage structure is configured to enable the pressure relief portion to drive the sealing portion to separate from the first opening end under the action of the buoyancy of the second liquid.

5. The toilet overflow device according to claim 4, characterized in that: The linkage structure includes a guide column arranged on the sealing part, and a guide hole arranged on the pressure relief part, the guide column is passed through the guide hole, wherein a limit piece is provided at the top end of the guide column passing through the guide hole, and the diameter of the limit piece is larger than the outer diameter of the guide hole.

6. The toilet overflow device according to claim 1, characterized in that: The toilet overflow device also includes a float, which is sleeved on the overflow pipe and connected to the pressure relief part.

7. The toilet overflow device according to claim 6, characterized in that: A guide structure is provided between the buoy and the overflow pipe. The guide structure comprises at least one guide rib and at least one guide groove. The guide rib can be inserted into the guide groove.

8. The toilet overflow device according to claim 1, characterized in that: The opening height of the sealing portion is greater than or equal to 18 mm.

9. A toilet water tank, characterized in that: The invention comprises a toilet overflow device as claimed in any one of claims 1 to 8.

10. A toilet, characterized in that: Comprising the toilet tank as claimed in claim 9.

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