Double-water-tank structure
The dual-tank structure and connecting pipe design solve the problem of poor toilet tank compatibility, achieving flexible installation and cost reduction, simplifying the maintenance process, and preventing sewage backflow and blockage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-03-10
AI Technical Summary
Existing toilet tanks are difficult to adapt to toilets with different S-bend structures and specifications, resulting in high production and inventory costs, and inconvenience in repair and replacement.
It adopts a dual-tank structure, connecting two independent tanks through a connecting pipe, and is equipped with a displacement device and overflow channel to adapt to various S-bend structures and toilet sizes, reducing installation space requirements. It is also equipped with a one-way valve to prevent sewage backflow and simplify the installation process.
It improves the compatibility and installation flexibility of water tanks, reduces production and inventory costs, simplifies the maintenance and replacement process, and avoids the risks of sewage backflow and blockage.
Smart Images

Figure CN223984068U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of kitchen and bathroom technology, and in particular to a double water tank structure. Background Technology
[0002] Toilet flushing uses ceramic or plastic water tanks, whose main function is to store water for flushing. Most existing tanks are single-sided and relatively tall to meet water volume requirements. U-shaped tanks, or sunken tanks, are also available, which are shorter. However, toilets come in various shapes and sizes, and these U-shaped tanks have a hollowed-out middle section to avoid the S-bend in the toilet bowl's pipe. But since the S-bend also varies in size, these tanks are difficult to fit different toilets, resulting in poor uniformity, increased production and inventory costs, and difficulty in finding replacement tanks for repairs and replacements. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model proposes a dual-tank structure that allows for more flexible installation.
[0004] A dual-tank structure includes a left water tank and a right water tank, which are installed at intervals and connected at their bottoms by a connecting pipe.
[0005] The dual-tank structure provided by this utility model uses two independent tanks connected by a connecting pipe, which reduces the installation space and the impact of the S-bend on the installation. It is applicable to various S-bend structures and toilets of different specifications, and has high compatibility. This avoids the need to produce and store tanks of various specifications, reducing production and inventory costs. At the same time, it can be used as a universal tank when consumers repair or replace toilet tanks.
[0006] Preferably, the left water tank is provided with an overflow channel. The top of the overflow channel has an overflow port that is higher than the normal operating water level of the water tank, and the bottom has a drain port that extends out of the water tank, which can drain excess water from the water tank. The dual-water tank structure also includes a displacement device. The displacement device has a sewage discharge channel. One end of the sewage discharge channel has a receiving interface for connecting to the S-bend of the toilet, and the other end has a sewage discharge port. The displacement device makes the installation of the toilet more flexible.
[0007] The sewage channel is also provided with an additional functional connection port between the receiving interface and the sewage outlet. The additional functional connection port is connected to the drain outlet of the overflow channel, so that the overflow water of the water tank does not need to be discharged into the toilet bowl. That is, the height of the top of the water tank and the height of the overflow channel can be flush with or even lower than the toilet bowl, thus the toilet water tank can be made lower.
[0008] Preferably, the additional functional connection port or overflow channel is equipped with a one-way valve to prevent sewage or odor from flowing back and overflowing.
[0009] Preferably, the overflow channel is provided with an installation cavity, and a one-way plug and a compressed spring are installed in the installation cavity from top to bottom. The spring pushes the one-way plug upward to block the overflow channel, and the one-way plug and the spring constitute the one-way valve.
[0010] Preferably, to reduce the molding difficulty of the shifter, the shifter includes a receiving section and a draining section. The receiving port is located at one end of the receiving section and faces upward. The draining port is located at one end of the draining section and faces downward. The other end of the receiving section and the other end of the draining section are connected and sealed with adhesive.
[0011] Preferably, the shifter further includes an extension tube, through which the receiving section and the sewage discharge section are connected, thereby extending the length of the shifter.
[0012] Preferably, to further improve the flexibility of toilet relocation and installation, there is at least one extension pipe. In addition, a limiting structure is provided between the receiving section and the sewage discharge section, and a limiting structure is also provided between the receiving section and the sewage discharge section and the extension pipe, which can ensure proper assembly and avoid leakage due to improper installation.
[0013] Preferably, the left water tank cover is provided with a drain pipe, the bottom opening of which extends to the top of the overflow port, and the top opening is connected to the overflow hole of the toilet bowl, so as to collect the water overflowing from the toilet bowl and prevent water from overflowing when the toilet is clogged.
[0014] Preferably, the connecting pipe is a flexible hose, which allows for more flexible placement.
[0015] Preferably, the left water tank is also equipped with a deodorization module.
[0016] As can be seen from the above description of this utility model, this utility model has the following beneficial effects:
[0017] The dual-tank structure provided by this utility model uses two independent tanks connected by a connecting pipe, which reduces the installation space or the impact of the S-bend on the installation. It is applicable to a variety of different S-bend structures and toilets of different specifications, and has high compatibility. This avoids the need to produce and store tanks of multiple specifications, reducing production and inventory costs. At the same time, it can be used as a universal tank when consumers repair or replace toilet tanks.
[0018] Install a relocation device to increase the flexibility of toilet installation;
[0019] With an overflow channel and a displacement device with an additional functional connection port, the overflow water from the tank does not need to be discharged into the toilet bowl. The height of the top of the tank and the height of its overflow channel can be flush with or even lower than the toilet bowl, thus allowing the toilet tank to be made lower.
[0020] The additional function connection port or overflow channel is equipped with a one-way valve to prevent sewage or odor from flowing back and overflowing.
[0021] The offset device is divided into a receiving section and a sewage discharge section, which can reduce the molding difficulty. In addition, an extension tube can be added to extend the length of the offset device, further increasing the distance of toilet installation and relocation.
[0022] A drain pipe is installed at the top of the overflow channel. The drain pipe can be connected to the overflow hole opened on the toilet bowl surface to catch the water that overflows from the toilet bowl surface, thus preventing water from overflowing when the toilet is clogged. Attached Figure Description
[0023] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.
[0024] in:
[0025] Figure 1 This is an axonometric view of a dual-tank structure;
[0026] Figure 2 This is a front view of a dual-tank structure (with a displacement device installed).
[0027] Figure 3 A top view of a dual-tank structure Figure 1 ;
[0028] Figure 4 A top view of a dual-tank structure Figure 2 (Set up the shifter)
[0029] Figure 5 This is a schematic diagram of a dual-tank toilet installation; (a displacement device and drain pipe are included, while the right tank and connecting pipe are concealed).
[0030] Figure 6 This is an exploded view of a dual-tank toilet installed on a toilet; (the offset device and drain pipe are shown, while the right tank and connecting pipe are hidden).
[0031] Figure 7 This is a cross-sectional view of a dual-tank structure installed on a toilet.
[0032] Figure 8 This is the axial view of the shifter. Figure 1 ;
[0033] Figure 9 This is the axial view of the shifter. Figure 2 ;
[0034] Figure 10 This is an exploded view of the shifter; (with extension tubes installed).
[0035] Figures 1 to 10 The markings are as follows: Left water tank 1, Right water tank 2, Connecting pipe 3, Overflow channel 4, Overflow port 41, One-way plug 42, Spring 43, Shifter 5, Socket 51, Drain port 52, Additional function connection port 53, Extension pipe 54, Toilet 6, S-bend 61, Pot surface 62, Overflow hole 621, Drain pipe 7, Deodorization module 8. Detailed Implementation
[0036] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0037] Please see Figures 1 to 10 A dual-tank structure includes a left water tank 1 and a right water tank 2, which are installed at intervals and connected at the bottom by a connecting pipe 3. Optionally, the connecting pipe 3 is a flexible hose, which allows for more flexible placement.
[0038] In this embodiment, the left water tank 1 is provided with an overflow channel 4. The top of the overflow channel 4 is provided with an overflow port 41 that is higher than the normal working water level of the water tank, and the bottom is provided with a drain port that extends out of the water tank, which can drain excess water from the water tank. The dual water tank structure also includes a displacement device 5. The displacement device 5 is provided with a sewage discharge channel. One end of the sewage discharge channel is provided with a receiving interface 51 that connects to the S-bend 61 of the toilet 6, and the other end is provided with a sewage discharge port 52. The displacement device 5 makes the installation of the toilet 6 more flexible.
[0039] The sewage discharge channel is also provided with an additional functional connection port 53 between the receiving interface 51 and the sewage outlet 52. The additional functional connection port 53 is connected to the drain outlet of the overflow channel 4, so that the overflow water of the water tank does not need to be discharged into the toilet 6 pot surface 62. That is, the height of the top of the water tank and the height of the overflow channel 4 can be flush with or even lower than the toilet 6 pot surface 62, so that the water tank of the toilet 6 can be made lower.
[0040] Based on the above embodiments, the additional functional connection port 53 or overflow channel 4 is equipped with a one-way valve to prevent sewage or odor from flowing back and overflowing.
[0041] For example, in one embodiment, the overflow channel 4 is provided with an installation cavity, in which a one-way plug 42 and a compressed spring 43 are installed from top to bottom. The spring 43 pushes the one-way plug 42 upward to block the overflow channel 4. The one-way plug 42 and the spring 43 constitute the one-way valve. When there is water in the overflow channel 4, the weight of the water will force the one-way plug 42 to move downward and open the overflow channel 4.
[0042] In other embodiments, to reduce the molding difficulty of the shifter 5, the shifter 5 includes a receiving section and a draining section. The receiving port 51 is located at one end of the receiving section and faces upward. The drain port 52 is located at one end of the draining section and faces downward. The other end of the receiving section and the other end of the draining section are connected and sealed with adhesive.
[0043] Based on the above embodiments, the displacement device 5 further includes an extension tube 54, through which the receiving section and the drain section are connected, thereby extending the length of the displacement device 5. Preferably, to further improve the flexibility of moving and installing the toilet 6, there is at least one extension tube 54. In addition, a limiting structure is provided between the receiving section and the drain section, and a limiting structure is also provided between the receiving section and the drain section and the extension tube 54, to ensure proper assembly and avoid leakage due to improper installation.
[0044] Based on the above embodiments, the left water tank 1 is provided with a drain pipe 7. The bottom opening of the drain pipe 7 extends to the top of the overflow port 41, and the top opening connects to the overflow hole 621 of the toilet bowl 62. This allows it to collect the water overflowing from the toilet bowl 62, preventing water from overflowing when the toilet 6 is clogged. At the same time, it allows the overflow water in the toilet bowl 62 and the overflow water in the water tank to flow through the same channel, avoiding overly complicated pipe layout and simplifying the structure.
[0045] In other embodiments, the left water tank 1 is also equipped with a deodorization module 8, which can eliminate odors.
[0046] The dual-tank structure provided by this utility model uses two independent tanks connected by a connecting pipe 3. This reduces the installation space and the impact of the S-bend 61 on the installation. It is applicable to various S-bend 61 structures and toilets of different specifications, and has high compatibility. This avoids the need to produce and store tanks of various specifications, reducing production and inventory costs. At the same time, it can be used as a universal tank when consumers repair or replace the toilet tank.
[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0050] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0051] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0052] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.
Claims
1. A dual water tank structure, characterized by, The double-tank structure comprises a left water tank and a right water tank, which are spaced apart and connected at the bottom by a connecting pipe; the left water tank is provided with an overflow channel, the top of the overflow channel is provided with an overflow port higher than the normal working water level of the water tank, and the bottom is provided with a drain port extending out of the water tank; the double-tank structure further comprises a shifter, the shifter is provided with a sewage discharge channel, one end of the sewage discharge channel is provided with a receiving port connected with an S-shaped bend of a toilet, the other end is provided with a sewage discharge port, and the sewage discharge channel is further provided with an additional function communication port between the receiving port and the sewage discharge port, the additional function communication port is in communication with the drain port of the overflow channel.
2. A dual water tank structure according to claim 1, wherein A one-way valve is arranged in the additional function communication port or the overflow channel.
3. A dual water tank structure according to claim 2, wherein A mounting cavity is arranged in the overflow channel, a one-way plug and a compressed spring are arranged in the mounting cavity from top to bottom, the spring pushes the one-way plug upward to block the overflow channel, and the one-way plug and the spring constitute the one-way valve.
4. The dual water tank structure of claim 1, wherein The shifter comprises a receiving section and a sewage discharge section, the receiving port is arranged at one end of the receiving section and opens upward, the sewage discharge port is arranged at one end of the sewage discharge section and opens downward, the other end of the receiving section is butted with the other end of the sewage discharge section, and the butted ends are sealed by adhesive.
5. A twin water tank structure according to claim 4, wherein The shifter further comprises an extension pipe, and the receiving section and the sewage discharge section are connected by the extension pipe.
6. A twin water tank structure according to claim 5, wherein At least one extension pipe is arranged between the receiving section and the sewage discharge section, and the receiving section, the sewage discharge section and the extension pipe are all provided with limiting structures.
7. A dual water tank structure according to claim 1, wherein A drain pipe is arranged on the tank cover of the left water tank, the bottom end of the drain pipe opens and extends to the top of the overflow port, and the top end of the drain pipe is connected with an overflow hole on the pot surface of the toilet.
8. A dual water tank structure according to claim 1, wherein The connecting pipe is a flexible pipe.
9. The dual water tank structure of claim 1, wherein A deodorization module is further arranged in the left water tank.