Drain valve device

Abstract

The application discloses a kind of drain valve devices, for being installed in the water tank with drain port in bottom, the bottom of water tank is equipped with the drain passage that can be communicated with drain port.Drain valve device includes power device and push plate, push plate is located below drain port.Power device includes elastic member, elastic member is configured to be compressed to store energy under the action of external power, and when releasing, elastic force is acted on push plate to push push plate to move between drain port and the bottom of drain passage.The drain valve device of the application can effectively enhance the flushing performance of the closestool, and the structure is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of flushing, and in particular to a drainage valve device. Background Art

[0002] For low-platform smart toilets, the built-in water tank is limited by the height of the toilet, resulting in a low liquid level. Relying solely on the potential energy of the water to flush is insufficient. Water pumps are currently commonly used as a power source to boost the pressure in the water system and increase the flushing force. However, water pumps are expensive and, as key components of the water system, prone to failure, leading to significant cost and quality pressures. Using a water pump also involves electronic control and drive components, increasing product quality risks.

[0003] Some manufacturers currently use tap water to boost flushing during flushing. However, this method cannot be used with existing ceramic pipes and requires additional piping to connect the tap water line in parallel to the main flush line. This complex connection also requires multiple sealing points, which can easily lead to leaks if not properly installed.

[0004] Therefore, the inventor, relying on years of experience and practice in related industries, proposes a drain valve device to overcome the defects of the prior art. Summary of the Invention

[0005] The object of the present invention is to provide a drain valve device which can effectively enhance the flushing performance of a toilet and has a simple structure.

[0006] The object of the present invention is achieved in this way: a drain valve device is used to be installed in a water tank with a drain outlet at the bottom, and the bottom of the water tank is provided with a drainage channel that can be connected to the drain outlet; the drain valve device includes a power device and a push plate, and the push plate is located below the drain outlet; the power device includes an elastic member, and the elastic member is configured to be compressed under the action of external power to store energy, and to apply elastic force to the push plate when released to push the push plate to move between the drain outlet and the bottom of the drainage channel.

[0007] In a preferred embodiment of the present invention, the external power utilizes fluid as a driving force, or utilizes a motor as a driving force.

[0008] In a preferred embodiment of the present invention, the drain valve device also includes a piston assembly and a mounting cylinder with closed ends. The mounting cylinder is fixed in the water tank and is provided with a mounting cylinder inlet. The piston assembly can be slidably inserted into the mounting cylinder, and its lower end passes through the bottom of the mounting cylinder and is connected to the push plate. The elastic member is clamped between the top wall of the mounting cylinder and the upper part of the piston assembly. Under the action of the fluid pressure at the mounting cylinder inlet, the piston assembly can be pushed to drive the push plate to move upward, so that the elastic member is compressed.

[0009] In a preferred embodiment of the present invention, an exhaust hole is provided at the top of the installation tube; a pressure relief hole is also provided at the bottom of the installation tube, and the pressure relief hole can be in an open state when the push plate moves downward.

[0010] In a preferred embodiment of the present invention, the piston assembly drives the push plate to move upward while the push plate can seal the drain port.

[0011] In a preferred embodiment of the present invention, a drain valve is provided in the water tank between the drain outlet and the mounting cylinder. The drain valve can seal the drain outlet under the action of gravity and can open the drain outlet when the push plate moves downward.

[0012] In a preferred embodiment of the present invention, a float assembly is provided in the water tank between the drain outlet and the mounting cylinder. The float assembly can seal the drain outlet under the action of gravity and can open the drain outlet under the action of buoyancy.

[0013] In a preferred embodiment of the present invention, a mounting seat is fixed in the water tank, and the mounting seat is a cylindrical structure with an open bottom. The mounting cylinder is fixed on the top of the mounting seat, and the lower end of the piston assembly passes through the top surface of the mounting seat; the float assembly includes a float, a first sealing ring and a second sealing ring, the float is an annular structure and is spaced apart on the outside of the piston assembly, and the float is located in the mounting seat and a gap is left between the float and the inner wall of the mounting seat; the first sealing ring is provided at the bottom end of the float, and the second sealing ring is provided in the middle of the inner ring surface of the float; the first sealing ring can be sealed in fit with the port of the drain outlet, and the second sealing ring can be sealed in fit with the upper part of the push plate.

[0014] In a preferred embodiment of the present invention, a limiting structure is provided in the water tank, and the drain valve device also includes a connecting rod and a motor. The motor is located outside the water tank and connected to the upper end of the connecting rod, the lower end of the connecting rod is connected to the push plate, and the elastic member is clamped between the limiting structure and the push plate; the motor can drive the connecting rod to drive the push plate to move upward, so that the elastic member is compressed and the push plate seals the drain outlet.

[0015] In a preferred embodiment of the present invention, the drain valve device also includes a connecting rod and a motor. The motor is located outside the water tank and connected to the upper end of the connecting rod, the lower end of the connecting rod is connected to the push plate, and the elastic member is clamped between the bottom of the water tank and the push plate; the motor can drive the connecting rod to drive the push plate to move upward so that the elastic member is compressed; a drain valve is also provided in the water tank, which can seal the drain outlet under the action of gravity and can open the drain outlet when the push plate moves downward.

[0016] As described above, the drain valve device of the present invention, through the boosting structure formed by the power device and the push plate, applies the power provided by the power device to the push plate, and utilizes the movement of the push plate to perform work on the water in the drainage channel, which can assist in increasing the impact of the main flushing waterway and enhance the flushing performance of the toilet. At the same time, the external power is first converted into the elastic potential energy of the elastic member for storage. During the flushing process, the elastic member is released, and the elastic potential energy stored in the elastic member is directly applied to the push plate, which can effectively ensure the force acting on the push plate and the work effect of the push plate on the water in the drainage channel, effectively enhancing the flushing performance, and has a simple structure. The entire device does not require additional pipelines to be connected in parallel to the main flushing waterway, which is not prone to water leakage. It can also achieve assisted flushing under low water pressure and ultra-low water pressure, resulting in a better flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0018] Figure 1 : A sectional view of a toilet provided by the present invention when external power is fluid driven.

[0019] Figure 2 :for Figure 1 Magnified view of the grey water tank and drain valve assembly.

[0020] Figure 3 : A structural diagram of the water tank and drain valve device provided by the present invention during the downward movement of the push plate when the external power is fluid-driven.

[0021] Figure 4 : A structural diagram of the water tank and drain valve device provided by the present invention when the push plate moves to the bottom when the external power is fluid-driven.

[0022] Figure 5 : Another cross-sectional view of the toilet provided by the present invention when external power adopts fluid drive.

[0023] Figure 6 :for Figure 5 Magnified view of the grey water tank and drain valve assembly.

[0024] Figure 7 : Another structural diagram of the water tank and the drain valve device provided by the present invention during the downward movement of the push plate when the external power is fluid-driven.

[0025] Figure 8 : Another structural diagram of the water tank and drain valve device provided by the present invention when the push plate moves to the bottom when the external power is fluid-driven.

[0026] Figure 9 : A sectional view of a toilet provided by the present invention when external power is driven by a motor.

[0027] Figure 10 :for Figure 9 Magnified view of the grey water tank and drain valve assembly.

[0028] Figure 11 : A structural diagram of the water tank and drain valve device during the downward movement of the push plate when the external power provided by the present invention is driven by a motor.

[0029] Figure 12 : A structural diagram of the water tank and drain valve device provided by the present invention when the push plate moves to the bottom when the external power is driven by a motor.

[0030] Figure 13 : Another cross-sectional view of the toilet provided by the present invention when driven by an electric motor with external power.

[0031] Figure 14 :for Figure 13 Magnified view of the grey water tank and drain valve assembly.

[0032] Figure 15 : Another structural diagram of the water tank and the drain valve device during the upward movement of the push plate when the external power is driven by a motor provided by the present invention.

[0033] Figure 16 : Another structural diagram of the water tank and drain valve device provided by the present invention when the external power is driven by a motor and the elastic part completes energy storage.

[0034] Figure 17 : Another structural diagram of the water tank and the drain valve device provided by the present invention during the downward movement of the push plate when the external power is driven by a motor.

[0035] Description of Figure Numbers:

[0036] 1. Ceramic body structure; 11. Water tank; 111. Annular sealing rib; 112. Drain outlet; 12. Drain channel; 13. Rubber waterway;

[0037] 2. Mounting cylinder; 21. Mounting cylinder inlet; 22. Piston stopper; 23. Exhaust hole; 24. Pressure relief hole; 25. Guide ring; 26. Annular guide rib; 271. Upper cylinder cover; 272. Lower cylinder body;

[0038] 3. Piston assembly; 31. Piston; 311. Raised ring; 312. Stop ring; 32. Connecting rod; 321. Ring plate; 322. Traction rope; 323. Connecting rod sealing ring; 33. Annular protrusion; 331. Piston sealing ring;

[0039] 4. Push plate; 41. Push plate sealing ring; 42. Extension column; 43. Flange;

[0040] 5. Elastic parts;

[0041] 6. Mounting seat; 61. Annular limiting member; 62. Limiting seat; 63. Annular mounting member;

[0042] 7. Drain valve; 71. Valve body; 711. First through hole; 72. Water stop device;

[0043] 8. Float assembly; 81. Float; 811. Annular groove; 812. Outer ring plate; 813. Inner ring plate; 814. Top ring plate; 815. Mounting ring; 82. First sealing ring; 83. Second sealing ring; 831. Float outlet; 84. Auxiliary ring frame. DETAILED DESCRIPTION

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0045] like Figures 1 to 17 As shown, this embodiment provides a drain valve device for installation in a water tank 11 having a drain opening 112 at the bottom. The bottom of the water tank 11 is provided with a drain channel 12 that is communicative with the drain opening 112. The drain valve device includes a power unit and a push plate 4, which is located below the drain opening 112. The power unit includes an elastic member 5, which is configured to be compressed by external power to store energy and, when released, to exert elastic force on the push plate 4, thereby pushing the push plate 4 between the drain opening 112 and the bottom of the drain channel 12.

[0046] Among them, the water tank 11 mainly refers to the water tank 11 in the toilet. The toilet includes a ceramic body structure 1, and the water tank 11 is built into the top of the ceramic body structure 1. The drain outlet 112 of the water tank 11 is mainly composed of an annular sealing rib 111 at the bottom opening of the water tank 11; the drainage channel 12 is arranged in the ceramic body structure 1 and below the water tank 11. The upper port of the drainage channel 12 can be connected to the drain outlet 112 of the water tank 11, and the side port of the drainage channel 12 is connected to the rubber waterway 13. The drainage channel 12 and the rubber waterway 13 constitute the main flushing channel of the toilet. The water tank 11 is also equipped with a corresponding water inlet valve. When the water inlet valve is opened, water can be fed into the water tank 11. The water inlet valve is mainly opened and closed according to the liquid level in the water tank 11. When the liquid level in the water tank 11 drops to a preset value, it automatically opens and water enters the water tank 11; when the liquid level in the water tank 11 rises to a preset value, it automatically closes and water stops entering the water tank 11. The specific structure of the water inlet valve is an existing structure and will not be described in detail here. The water inlet and the drainage valve device in the water tank 11 are independent of each other. When flushing is required, the combination of the gravity of the water in the water tank 11 and the movement of the push plate 4 can effectively increase the flow rate of the water flow and improve the flushing effect.

[0047] Thus, the drain valve device of this embodiment, through the boosting structure formed by the power device and push plate 4, applies the power provided by the power device to the push plate 4. The movement of the push plate 4 then acts on the water in the drain channel 12, thereby increasing the flushing force of the main flushing channel and enhancing the flushing performance of the toilet. Furthermore, external power is first converted into elastic potential energy of the elastic member 5 for storage. During the flushing process, the elastic member 5 releases this stored elastic potential energy, directly applying it to the push plate 4. This effectively ensures the force acting on the push plate 4 and the work performed by the push plate 4 on the water in the drain channel 12, effectively enhancing flushing performance. The device also has a simple structure. The entire device does not require additional piping connected in parallel to the main flushing channel, which is less likely to cause water leakage. It also enables assisted flushing at low and ultra-low water pressures, resulting in a better flushing effect.

[0048] Furthermore, positioning the push plate 4 below the drain outlet 112 facilitates downward movement of the push plate 4 to work on the water in the drain channel 12. Furthermore, the push plate 4 can simultaneously serve as a seal for blocking the drain outlet 112, or it can function as a non-sealing member. When the push plate 4 also serves as a seal for blocking the drain outlet 112, it not only provides a boost, but also, because the drain outlet 112 is sealed from below, flushing requires no other components to first move upward within the water in the water tank 11; the push plate 4 can simply move downward, minimizing potential energy loss within the water tank 11 and effectively ensuring a flushing effect.

[0049] The elastic member 5 is preferably a spring, and the external power can be a fluid or a motor. The fluid can be a liquid (e.g., water) or a gas, depending on the needs. Of course, the external power can also be other power sources as long as it can easily compress the elastic member 5 to store energy.

[0050] For external power, the fluid drive method is adopted. The specific structure can be realized as follows: Figures 1 to 8 The drain valve assembly comprises a piston assembly 3 and a mounting tube 2, which is sealed at both ends. The mounting tube 2 is fixedly mounted in the water tank 11 and is provided with a mounting tube inlet 21. The piston assembly 3 is slidably inserted into the mounting tube 2, with its lower end extending through the bottom of the mounting tube 2 and connected to the push plate 4. An elastic member 5 is sandwiched between the top wall of the mounting tube 2 and the upper portion of the piston assembly 3. Under the action of fluid pressure in the mounting tube inlet 21, the piston assembly 3 is pushed, driving the push plate 4 upward, thereby compressing the elastic member 5.

[0051] When tap water is used as the fluid entering the mounting cylinder inlet 21, the pressure of tap water is relatively low, and is low or ultra-low. Generally, an annular protrusion 33 protruding outward is provided on the upper portion of the piston assembly 3. The outer wall of the annular protrusion 33 is positioned close to the inner wall of the mounting cylinder 2, with a gap (e.g., 0.5 mm) between the two. This ensures a seal between the piston assembly 3 and the mounting cylinder 2 while preventing excessive friction from affecting the movement of the piston assembly 3. The mounting cylinder inlet 21 is located below the annular protrusion 33. For example, the mounting cylinder inlet 21 can be located on the bottom sidewall of the mounting cylinder 2. After the fluid enters the mounting cylinder inlet 21, the fluid pressure acts on the annular protrusion 33, pushing the piston assembly 3 upward, thereby compressing the elastic member 5 to store energy. After the elastic member 5 is released, the elastic force acts on the piston assembly 3 to push the push plate 4 downward, thereby performing work on the water.

[0052] The entire device uses the energy in the fluid as external power to compress the elastic part 5 for energy storage, and at the same time uses the elastic potential energy stored in the elastic part 5 as the driving force of the power device to push the push plate 4 to do work. It adopts a purely mechanical structure to achieve assisted flushing, and does not require other power sources such as water pumps to pressurize the water channel. The structure is simple, easy to implement, not prone to failure, low cost, and more practical.

[0053] Preferably, an exhaust hole 23 is provided on the top of the mounting cylinder 2. By utilizing the exhaust hole 23, when the piston assembly 3 continuously moves upward, the elastic member 5 is compressed while the mounting cylinder 2 is exhausted to the outside, which is more conducive to the movement of the piston assembly 3.

[0054] Preferably, a pressure relief hole 24 is provided at the bottom of the mounting tube 2. The pressure relief hole 24 can be opened when the push plate 4 moves downward. The pressure relief hole 24 is specifically provided on the bottom sidewall of the mounting tube 2. A pressure relief valve or solenoid valve is generally installed at the pressure relief hole 24 to control the opening timing of the pressure relief hole 24.

[0055] When fluid enters the installation cylinder inlet 21, the area below the annular protrusion 33 in the installation cylinder 2 will be filled with fluid. After the installation cylinder inlet 21 stops entering the fluid, the fluid in the installation cylinder 2 may prevent the piston assembly 3 from moving down smoothly, and may also affect the next time the fluid enters the installation cylinder inlet 21. Therefore, a pressure relief hole 24 is provided. The pressure relief hole 24 is closed when the installation cylinder inlet 21 is in the state of entering fluid, so as to ensure that the fluid pressure drives the piston assembly 3 to move and compress the elastic member 5. When flushing is required, the pressure relief hole 24 is opened, and the fluid in the installation cylinder 2 is discharged, realizing the pressure relief process, so that the push plate 4 can move down smoothly. Generally, the fluid in the installation cylinder 2 is completely discharged, for example, the pressure relief hole 24 can be closed after the push plate 4 moves to the bottom of the drainage channel 12.

[0056] Generally, to facilitate processing and installation, the piston assembly 3 includes a piston 31 and a connecting rod 32 connected vertically. The lower end of the connecting rod 32 extends through the bottom of the mounting tube 2 and is connected to the push plate 4. The aforementioned annular protrusion 33 can be formed at the junction of the piston 31 and the connecting rod 32. Specifically, the piston 31 is generally cylindrical, with the outer diameters of the columnar structure and the connecting rod 32 both smaller than the inner diameter of the mounting tube 2. The lower portion of the piston 31 has an outwardly protruding convex ring 311, and the upper portion of the connecting rod 32 has an outwardly protruding ring plate 321. An annular sealing groove is formed between the convex ring 311 and the ring plate 321. A piston sealing ring 331 is embedded in the annular sealing groove. The outer diameter of the piston sealing ring 331 is slightly smaller than the inner diameter of the mounting tube 2, and a small gap (typically 0.5 mm) is formed between the two. This ensures a seal between the piston 31 and the mounting tube 2 while reducing friction between them. The convex ring 311, the ring plate 321, and the piston sealing ring 331 constitute the aforementioned annular protrusion 33. Of course, the annular protrusion 33 can also be made of a plastic part and formed separately on the piston 31 or separately on the connecting rod 32, and a small gap can be left between the plastic part and the inner wall of the mounting cylinder 2, which is more convenient to process.

[0057] Generally, a piston limiter 22 is provided in the installation cylinder 2 near its top, which is used to limit the upward position of the piston assembly 3 (specifically, to limit the piston 31). The upper end of the connecting rod 32 and the piston 31 can be fixed in any manner. For example, the upper end of the connecting rod 32 can have a claw, and the bottom of the piston 31 can have a corresponding groove. The claw can be fixed in the groove, and the installation operation is easier by fixing it by clamping. The specific shape of the piston 31 can be as follows: Figure 2 and Figure 6 The structure shown in FIG. 1 is a cylindrical structure with a hollow interior, a closed top and an open bottom, so as to be connected to the upper end of the connecting rod 32 by a snap-fitting manner.

[0058] Reference Figure 2 and Figure 6 A guide ring 25 surrounding the exhaust hole 23 can also be provided on the top inner wall of the mounting cylinder 2 to guide the movement of the piston 31. The above-mentioned piston limiting portion 22 can be arranged according to Figure 2 The figure shows the limiting step on the inner wall of the mounting cylinder 2. The annular protrusion 33 (specifically the convex ring 311) can be pressed against the limiting step to form a limit position. At this time, the two ends of the elastic member 5 can be pressed against the top wall of the mounting cylinder 2 and the convex ring 311 respectively. When the convex ring 311 is pressed against the piston limiting portion 22, the top of the piston 31 can also be pressed according to the Figure 2 Alternatively, the exhaust hole 23 may be extended as shown in FIG. Figure 6As shown in the figure, the bottom end of the guide ring 25 constitutes the piston limiting portion 22, and the middle part of the piston 31 has a step surface. The two ends of the elastic member 5 can respectively press against the top wall of the mounting cylinder 2 and the step surface. A limiting ring 312 can also be formed on the outer periphery of the step surface to better limit the elastic member 5.

[0059] A through hole is provided at the bottom of the mounting tube 2 to facilitate the passage of the connecting rod 32. The gap between the connecting rod 32 and the through hole is very small (for example, 0.5 mm) to minimize water seepage here, basically ensuring the seal between the two and reducing the friction between the two, which is more conducive to the smooth movement of the connecting rod 32. Figure 6 As shown in FIG, an annular guide rib 26 is provided at the through hole to better guide the up and down movement of the connecting rod 32 and make the structure more stable.

[0060] In order to facilitate the fixing of the installation tube 2, a mounting base 6 is fixed in the water tank 11, and the installation tube 2 is fixed on the mounting base 6, and the top of the installation tube 2 extends out of the water tank 11. The mounting base 6 can adopt a hollow frame structure or a cylindrical structure with a partial cylindrical wall as needed, but a gap is left between its lower end and the bottom inner wall of the water tank 11 so that it will not affect the water in the water tank 11 from flowing into the drain port 112 when flushing. The installation tube 2 can be installed according to Figure 2 The cylindrical body shown in FIG includes a cylindrical body with an opening at the bottom, the bottom end of the cylindrical body is fixedly connected to the mounting seat 6, the top surface of the mounting seat 6 constitutes the bottom of the mounting cylinder 2, the exhaust hole 23, the mounting cylinder inlet 21 and the pressure relief hole 24 are all opened on the cylindrical body, and the through hole is opened on the top surface of the mounting seat 6. Alternatively, the mounting cylinder 2 can also be arranged according to Figure 6 The figure shows an upper cylinder cover 271 with a bottom opening and a lower cylinder body 272 with a top opening. The upper cylinder cover 271 and the lower cylinder body 272 are fixedly connected. The exhaust hole 23 is provided on the upper cylinder cover 271. The mounting cylinder inlet 21, the pressure relief hole 24 and the through hole are all provided on the lower cylinder body 272. The bottom of the lower cylinder body 272 is fixedly connected to the mounting seat 6.

[0061] The fixing method of the lower end of the connecting rod 32 and the push plate 4 can be any method, for example, Figure 2 and Figure 6 The lower end of the connecting rod 32 shown in the figure is fixed to the push plate 4 by a socket connection (interference fit), which is simple and convenient. In addition, the piston assembly 3 can also adopt an integrally formed one-piece structure, or other structural forms. This embodiment is only an example.

[0062] Furthermore, in a structure where the external power is fluid-driven, in order to facilitate the closing and opening of the drain outlet 112, the following three opening and closing methods of the drain outlet 112 can be used:

[0063] (1) The first method of opening and closing the drain outlet 112: Figures 1 to 4 When the piston assembly 3 drives the push plate 4 to move upward, the push plate 4 can seal the drain port 112.

[0064] It is understood that a push plate sealing ring 41 is provided on the push plate 4, which can be in sealing contact with the lower end of the annular sealing rib 111 to seal the drain outlet 112. In other words, when fluid enters the installation cylinder inlet 21 and pushes the piston assembly 3 to drive the push plate 4 upward, it not only compresses the elastic member 5 but also enables the push plate 4 to seal the drain outlet 112. The entire boosting structure not only constitutes the drain valve structure of the water tank 11, but also has the function of assisting flushing, realizing the integration of the drain valve function and the assisting flushing function, and further simplifying the structure.

[0065] To facilitate the processing of the push plate sealing ring 41 and the connection between the push plate 4 and the connecting rod 32, the push plate 4 may include, for example, a plastic part and a rubber part fixedly connected at the top and bottom. The plastic part may be connected to the connecting rod 32 by a socket-type plug-in connection, and the outer ring of the top surface of the rubber part constitutes the push plate sealing ring 41. Of course, the push plate 4 may also be made entirely of a plastic plate and a separate push plate sealing ring 41 may be fixed to the plastic plate, or other processing and installation methods may be used.

[0066] For more details, refer to Figures 1 to 4 Taking tap water as an example, the specific working process of this structure is as follows:

[0067] The water inlet of the water tank 11 and the water inlet of the installation cylinder 21 are independent and are connected to the tap water through corresponding pipelines respectively; the opening and closing of the installation cylinder inlet 21 can be achieved by setting an on-off valve to control the water inlet on the pipeline connected thereto.

[0068] In the initial state (i.e., the state before flushing, if Figure 1 and Figure 2 As shown, the installation cylinder inlet 21 is opened, and water flows into the installation cylinder 2, causing the water level in the installation cylinder 2 to continuously increase. Under the action of tap water pressure, the piston 31 is pushed to compress the elastic member 5 until the piston 31 moves to the top of the installation cylinder 2 and is limited by the piston limit portion 22, thereby allowing the push plate sealing ring 41 to seal the drain outlet 112; at this time, the elastic member 5 is in a state of complete compression and energy storage.

[0069] When the piston 31 moves to the top of the mounting cylinder 2 and is limited by the piston limiting portion 22, the mounting cylinder inlet 21 can be closed to stop water from entering; since the part below the annular protrusion 33 in the mounting cylinder 2 is basically sealed, the compressed energy storage state of the elastic member 5 can be maintained.

[0070] When the user presses the flush button (i.e., gives a flush signal), the pressure relief hole 24 is opened, and the water in the installation cylinder 2 is discharged from the pressure relief hole 24 into the water tank 11 to achieve pressure relief; when pressure relief occurs, the tap water pressure drops instantly, and the piston 31 is no longer affected by the water pressure. The compressed elastic member 5 will quickly stretch from the compressed state and move downward, and the piston 31 and the connecting rod 32 act on the push plate 4, so that the push plate 4 moves downward quickly, and the push plate sealing ring 41 is separated from the drain port 112, thereby opening the drain port 112 and exerting a force on the drainage of the water tank 11. The specific process can be referred to Figure 3 and Figure 4 , Figure 3 The figure shows the elastic member 5 in the released state. Figure 4 The figure shows that the push plate 4 reaches the bottom of the drainage channel 12 and completes the power-assisting state. At this time, the drain outlet 112 continues to drain until the installation cylinder inlet 21 is opened again. The tap water pushes the piston 31 to rise and compress the elastic part 5 until it reaches the push plate sealing ring 41 to complete the sealing of the drain outlet 112.

[0071] After flushing is completed, the installation cylinder inlet 21 is opened again to allow water to flow in, so that the water level in the installation increases continuously, compressing the elastic member 5, causing the push plate 4 to reset, and the drain port 112 to be sealed again, and the entire device returns to its initial position. Figure 1 and Figure 2 Synchronously, the water inlet valve starts to inlet water, and the water level in the water tank 11 begins to rise until it reaches the working water level, completing a flushing process.

[0072] The entire drain valve device adopts a water-driven method using a lower sealing elastic member to store energy, converting the energy in the tap water into the elastic potential energy of the elastic member 5, and the energy storage action can be completed at ultra-low pressure. During the flushing process, the elastic member 5 is released at the moment of release, and the elastic potential energy acts on the push plate 4, and the push plate 4 is used to convert the work done on the water in the drainage channel 12 into the kinetic energy of the water, thereby increasing the water flow rate, thereby increasing the impact of the main flushing water path and improving the flushing performance. The push plate sealing ring 41 on the push plate 4 is sealed to the drain port 112 by the tension of the compressed elastic member 5. The lower sealing method eliminates the need for additional sealing devices and realizes the integration of the drain valve function and the assisted flushing function, making the structure simpler. In addition, in the initial state, the elastic member 5 is always in a compressed energy storage state. When flushing is required, the elastic member 5 can be immediately released and push the push plate 4 downward, which shortens the waiting time and makes the assisted flushing faster. The device can store energy under ultra-low water pressure, assist flushing, and improve flushing performance under low pressure. Compared with the existing water systems on the market that use tap water to assist flushing, it solves the problem of weak assistance under ultra-low water pressure and achieves assisted flushing under ultra-low water pressure.

[0073] (2) The second method of opening and closing the drain outlet 112: A drain valve 7 is provided in the water tank 11 and between the drain outlet 112 and the mounting tube 2. The drain valve 7 can seal the drain outlet 112 under the action of gravity and can open the drain outlet 112 when the push plate 4 moves downward.

[0074] Generally, the drain valve 7 includes a valve body 71 and a water-stopping device 72 that can move up and down and is located at the bottom of the valve body 71. The valve body 71 is fixed in the water tank 11. The bottom surface of the water-stopping device 72 has a sealing gasket. The water-stopping device 72 itself has a certain weight. After the flushing is completed, the water-stopping device 72 can automatically move down and seal the drain outlet 112 under the action of gravity; when manually pressed or otherwise, the water-stopping device 72 can be lifted up by the linkage of a lever structure, a traction rope structure or other structure, thereby opening the drain outlet 112. The specific structure of the drain valve 7 is an existing structure and will not be described in detail here. It can adopt any type of drain valve commonly used in existing toilet water tanks, as long as it can conveniently realize the opening and closing of the drain outlet 112 alone.

[0075] Since the position of the drain valve 7 is roughly coaxial with the connecting rod 32, in order to avoid interference between the two, a first through hole 711 and a second through hole are respectively provided on the valve body 71 and the water-stop device 72, which pass through the valve body 71 and the water-stop device 72. The two through holes are coaxially arranged to allow the connecting rod 32 to pass through; a corresponding sealing structure is also added between the water-stop device 72 and the connecting rod 32 to ensure the sealing effect of the water-stop device 72 on the drain outlet 112.

[0076] The action of the entire drain valve 7 is independent of the action of the elastic member 5 and the push plate 4 in the booster structure, which respectively realize the opening and closing of the drain outlet 112 and the elastic energy storage and assisted flushing. A booster structure is added on the basis of the existing drain valve, and the push plate 4 in the booster structure is used to do work on the water in the drainage channel 12, which can effectively improve the flushing performance.

[0077] In more detail, taking tap water as an example of the fluid entering the installation cylinder inlet 21, the specific working process under this structural mode is as follows:

[0078] The water inlet to the water tank 11 and the water inlet to the mounting cartridge 21 are independent. The mounting cartridge 21 can be opened and closed by installing a corresponding on-off valve in the connected pipeline. This structure is essentially the same as the second method for opening and closing the drain outlet 112 described above, differing only in that the push plate sealing ring 41 is not required on the push plate 4, and the drain outlet 112 is opened and closed via the drain valve 7. Therefore, there are some differences in the operating process.

[0079] In the initial state, the installation cylinder inlet 21 is in a closed state, the push plate 4 is at the bottom of the drainage channel 12, and the elastic member 5 is not compressed to store energy; at the same time, the drain valve 7 is always in a closed state, and the water stop device 72 seals the drain outlet 112.

[0080] After the user presses the flush button, the installation cylinder inlet 21 opens first, pushing the piston 31 to compress the elastic member 5 until the piston 31 reaches the top of the installation cylinder 2. At this point, the elastic member 5 is in a state of complete compression and energy storage. After the piston 31 reaches the top of the installation cylinder 2, the installation cylinder inlet 21 can be closed. After the elastic member 5 has completed compressing and storing energy, the pressure relief hole 24 is opened to release the pressure of the elastic member 5, pushing the push plate 4 downward. At the same time, the drain valve 7 is opened, and the water stop device 72 moves upward to push the drain port 112, which opens. The movement of the push plate 4 assists in draining water from the water tank 11, improving flushing performance.

[0081] In this structure, the elastic member 5 does not need to be compressed in the initial state. It can be compressed only when flushing is required, which can effectively extend the service life of the elastic member 5. At the same time, the upper sealing elastic member adopts an energy storage water drive method, and the flushing performance is improved by the elastic potential energy acting on the push plate 4. The upper sealing method adopts a gravity seal, which is not easy to leak, is easier to process and manufacture, and has stable performance.

[0082] (3) The third method of opening and closing the drain outlet 112: Figures 5 to 8 A float assembly 8 is provided in the water tank 11 and between the drain outlet 112 and the mounting cylinder 2. The float assembly 8 can seal the drain outlet 112 under the action of gravity and can open the drain outlet 112 under the action of buoyancy.

[0083] Specifically, a mounting base 6 is fixed in the water tank 11. The mounting base 6 is a cylindrical structure with an open bottom. The mounting cylinder 2 is fixed on the top of the mounting base 6, and the lower end of the piston assembly 3 passes through the top surface of the mounting base 6; the float assembly 8 includes a float 81, a first sealing ring 82 and a second sealing ring 83. The float 81 is an annular structure and is spaced apart on the outside of the piston assembly 3, and the float 81 is located in the mounting base 6 and a gap is left between the float 81 and the inner wall of the mounting base 6; the first sealing ring 82 is provided at the bottom end of the float 81, and the second sealing ring 83 is provided in the middle of the inner ring surface of the float 81; the first sealing ring 82 can be sealed in fit with the port of the drain outlet 112, and the second sealing ring 83 can be sealed in fit with the upper part of the push plate 4.

[0084] Generally, in order to facilitate processing and installation, the mounting seat 6 includes a limit seat 62 and an annular mounting member 63 fixed upper and lower. The limit seat 62 is a cylindrical structure with a top surface, side walls and an open bottom. The annular mounting member 63 is an annular structure with open ends and a hollow hole in the side wall. The hollow hole at the bottom can make it easier for water in the water tank 11 to flow into the limit seat 62; a mounting hole for the connecting rod 32 to pass through is also provided on the top surface of the mounting seat 6 (that is, the top surface of the limit seat 62), and a gap is left between the bottom of the annular mounting member 63 and the bottom inner wall of the water tank 11.

[0085] The shape of the float 81 can be, for example, Figure 6 and Figure 7 As shown in the figure, an annular groove 811 with a notch facing downward is formed inside its side wall, that is, an annular structure with an annular groove 811 is formed by the outer ring plate 812, the inner ring plate 813 and the top ring plate 814. The first sealing ring 82 is arranged at the bottom end of the inner ring plate 813; an upwardly extending mounting ring 815 is provided in the middle of the inner ring surface of the inner ring plate 813, the inner diameter of the mounting ring 815 is larger than the outer diameter of the connecting rod 32, the second sealing ring 83 is arranged at the bottom of the mounting ring 815, and the inner ring hole of the second sealing ring 83 constitutes the float water outlet 831; an auxiliary ring frame 84 is generally fixed on the lower inner wall of the inner ring plate 813 to provide a step for the installation of the first sealing ring 82 and the second sealing ring 83. The first sealing ring 82 is installed between the bottom end of the inner ring plate 813 and the lower step surface of the auxiliary ring frame 84, and the second sealing ring 83 is installed between the bottom of the mounting ring 815 and the top of the auxiliary ring frame 84. In order to facilitate the fit between the push plate 4 and the second sealing ring 83, an extension column 42 is extended upward on the upper surface of the push plate 4, and a flange 43 protruding outward is formed on the top of the extension column 42. The flange 43 is located below the second sealing ring 83 and can move upward to fit with the lower surface of the second sealing ring 83 to achieve sealing.

[0086] Preferably, a pressure relief port is provided on the top surface of the mounting seat 6 (specifically, on the top surface of the limiting seat 62). When the float 81 floats up under the action of buoyancy, the water on the top of the float 81 can flow out of the pressure relief port into the water tank 11, thereby ensuring the smooth floating movement of the float 81.

[0087] For more details, refer to Figures 5 to 8 Taking tap water as an example, the specific working process of this structure is as follows:

[0088] The water inlet of the water tank 11 and the water inlet of the installation cylinder 21 are independent of each other. The opening and closing of the installation cylinder inlet 21 can be achieved by providing a corresponding on-off valve on the pipeline connected thereto.

[0089] In the initial state, if Figure 5 and Figure 6As shown, under the action of the gravity of the buoy 81, the first sealing ring 82 presses the upper end of the annular sealing rib 111, preliminarily sealing the drain outlet 112; and the mounting cylinder inlet 21 is opened, and water flows into the mounting cylinder 2, pushing the piston 31 to the top and being limited by the piston limiter 22, so that the flange 43 on the push plate 4 is sealed against the second sealing ring 83, achieving the effect of completely sealing the drain outlet 112; at this time, the elastic member 5 is in a state of complete compression and energy storage. After the piston 31 moves to the top of the mounting cylinder 2, the mounting cylinder inlet 21 can be closed. In addition, in the initial state, since the interior of the mounting seat 6 is connected to the water in the water tank 11, and the annular groove 811 is also connected to the water in the water tank 11, the gap between the inner wall of the mounting seat 6 and the outer wall of the buoy 81 in the annular groove 811, and the mounting seat 6 above the buoy 81 are all filled with water.

[0090] When the user presses the flush button, the pressure relief hole 24 is released. The piston 31 is no longer affected by water pressure, and the elastic member 5 begins to expand from its compressed state, pushing the piston 31 downward, driving the push plate 4 downward, causing the flange 43 to disengage from the second sealing ring 83. This opens the float outlet 831, and the water within the mounting seat 6 and above the float 81 flows downward through the float outlet 831. Simultaneously, water in the water tank 11 flows through the hollow hole in the annular mounting member 63, passing through the gap between the float 81 and the stop seat 62 and flowing toward the top of the float 81. Therefore, the water flow at the float outlet 831 and the water flow through the hollow hole and the aforementioned gap toward the top of the float 81, due to the different water outlet areas, creates a pressure differential, causing the float 81 to float upward under the influence of the water pressure. The first sealing ring 82 disengages from the drain outlet 112, thereby opening the drain outlet 112 and boosting the drainage of the water tank 11.

[0091] The specific process can be referred to Figure 7 and Figure 8 , Figure 7 The figure shows the state in which the elastic member 5 is released and the buoy 81 floats up to open the drain port 112. Figure 8 The figure shows that the push plate 4 reaches the bottom and the power-assisting state is completed. At this time, the drain outlet 112 continues to drain until the water level in the water tank 11 reaches the preset water level, the float 81 falls, the first sealing ring 82 preliminarily seals the drain outlet 112, and the installation cylinder inlet 21 is opened. The tap water pushes the piston 31 to rise and compress the elastic member 5 until the piston 31 reaches the top. The push plate 4 seals the second sealing ring 83 and completes the sealing of the drain outlet 112.

[0092] After the drain port 112 is completely sealed again, the flushing process is completed and the entire device returns to the initial position state. Figure 5 and Figure 6 shown.

[0093] In this structure, an upper sealing elastic member is driven by energy storage water, and the flushing performance is improved by the elastic potential energy acting on the push plate 4. At the same time, the float assembly 8 is used to rely on gravity to achieve the upper sealing of the drain outlet 112, which is not easy to leak, is easier to process and manufacture, and has stable performance. Moreover, the buoyancy of tap water can be used to achieve the upward movement of the float 81, without the need for linkage of other mechanical parts, and the structure is more simplified.

[0094] For the external power, the motor drive mode is adopted. The specific structure can be realized as follows: Figures 9 to 12 A limiting structure is provided within the water tank 11. The drain valve device further includes a connecting rod 32 and a motor. The motor is located outside the water tank 11 and connected to the upper end of the connecting rod 32. The lower end of the connecting rod 32 is connected to the push plate 4. An elastic member 5 is sandwiched between the limiting structure and the push plate 4. The motor drives the connecting rod 32 to move the push plate 4 upward, compressing the elastic member 5 and causing the push plate 4 to seal the drain opening 112.

[0095] It is understood that a push plate sealing ring 41 is provided on the push plate 4, which can be sealed against the lower end of the annular sealing rib 111 to seal the drain outlet 112. When the motor drives the push plate 4 upward via the connecting rod 32, it not only compresses the elastic member 5 but also seals the drain outlet 112. The entire boosting structure not only constitutes the drain valve structure of the water tank 11 but also has the function of assisting flushing, realizing the integration of the drain valve function and the assisting flushing function, and further simplifying the structure.

[0096] The connecting rod 32 and the push plate 4 can be fixed in any manner, for example, the connecting rod 32 can have a claw at its lower end and a slot formed at its upper portion, and the two can be fixed by a snap connection. Generally, a mounting seat 6 is fixedly provided in the water tank 11, and the top surface of the mounting seat 6 constitutes a limiting structure. A perforation is also provided on the top surface of the mounting seat 6 for the connecting rod 32 to pass through. An annular limiting member 61 surrounding the perforation is also provided on the lower surface of the top of the mounting seat 6 to limit the installation of the elastic member 5. The mounting seat 6 can be hollowed out around its periphery, with a gap between its bottom and the bottom inner wall of the water tank 11, so as not to affect the flow of water in the water tank 11 into the drain outlet 112 during flushing.

[0097] In addition, as needed, the output shaft of the motor can be directly fixed to the upper end of the connecting rod 32, or can be fixed to the upper end of the connecting rod 32 through a traction rope 322. Generally, it is preferred to directly connect the motor to the connecting rod 32, so that the motor can generate a downward thrust on the connecting rod 32, which is more conducive to the downward movement of the push plate 4.

[0098] For more details, refer to Figures 9 to 12 Taking the motor connected to the connecting rod 32 via the traction rope 322 as an example, the specific working process under this structural mode is as follows:

[0099] In the initial state, such as Figure 9 and Figure 10 As shown, the motor drives the traction rope 322 to pull upward, so that the connecting rod 32 drives the push plate 4 to be subjected to an upward pulling force, thereby causing the push plate sealing ring 41 to seal the drain outlet 112. At this time, the elastic member 5 is in a state of complete compression and energy storage.

[0100] When the user presses the flush button, the motor releases the traction rope 322 (the motor does not work at this time), the push plate 4 is no longer subjected to the upward pulling force, and the elastic member 5 begins to stretch from the compressed state and begins to push the push plate 4 downward, thereby opening the drain port 112 and exerting a boosting effect on the water tank 11 to drain water. Figure 11 and Figure 12 , Figure 11 The figure shows the elastic member 5 in the released state. Figure 12 The push plate 4 is shown to have reached the bottom of the drainage channel 12 and completed the power-assisting state. At this time, the drain outlet 112 continues to drain water until the motor starts to drive the traction rope 322 to rise. The push plate 4 follows and rises and compresses the elastic part 5 until it reaches the push plate sealing ring 41 to complete the sealing of the drain outlet 112.

[0101] After the drain port 112 is completely sealed again, the flushing process is completed and the entire device returns to the initial position state. Figure 9 and Figure 10 shown.

[0102] In this structure, a lower sealing elastic member energy storage motor drive mode is adopted, and the flushing performance is improved by the elastic potential energy acting on the push plate 4; the tension of the compression elastic member 5 is used to realize the sealing of the push plate sealing ring 41 on the push plate 4 to the drain outlet 112. The lower sealing method is adopted, and no additional sealing device is required. The integration of the drain valve function and the power-assisted flushing function is realized, and the structure is simple.

[0103] For the external power adopting the motor drive mode, the specific structure can also be realized as follows: Figures 13 to 17 The drain valve assembly also includes a connecting rod 32 and a motor. The motor is located outside the water tank 11 and connected to the upper end of the connecting rod 32. The lower end of the connecting rod 32 is connected to the push plate 4. An elastic member 5 is sandwiched between the bottom of the water tank 11 and the push plate 4. The motor drives the connecting rod 32 to move the push plate 4 upward, compressing the elastic member 5. A drain valve 7 is also located within the water tank 11. The drain valve 7 seals the drain port 112 under the action of gravity and opens the drain port 112 when the push plate 4 moves downward.

[0104] The drain valve 7 herein has the same structure as the drain valve 7 mentioned in the second method for opening and closing the drain outlet 112, comprising a valve body 71 and a water-stopping device 72. The specific structure is conventional. Furthermore, in this structure, the drain valve 7 is positioned approximately coaxially with the connecting rod 32. To prevent interference between the two, a first through-hole 711 and a second through-hole are provided in the valve body 71 and the water-stopping device 72, respectively, extending vertically therethrough. The two through-holes are coaxially arranged to allow the connecting rod 32 to pass through. A connecting rod sealing ring 323 is also sleeved and fixed to the upper portion of the connecting rod 32. When the push plate 4 abuts against the bottom of the drain channel 12, the connecting rod sealing ring 323 seals the gap between the connecting rod 32 and the second through-hole, thereby ensuring the sealing effect of the water-stopping device 72 on the drain outlet 112.

[0105] With this structure, the action of the entire drain valve 7 is independent of the action of the elastic member 5 and the push plate 4, which respectively realize the opening and closing of the drain outlet 112 and the elastic energy storage and assisted flushing. A booster structure is added on the basis of the existing drain valve, and the push plate 4 in the booster structure is used to do work on the water in the drain channel 12, which can effectively improve the flushing performance.

[0106] In addition, as needed, the output shaft of the motor can be directly fixed to the upper end of the connecting rod 32, or can be fixed to the upper end of the connecting rod 32 through a traction rope 322. Generally, it is preferred to directly connect the motor to the connecting rod 32, so that the motor can generate a downward thrust on the connecting rod 32, which is more conducive to the downward movement of the push plate 4.

[0107] For more details, refer to Figures 13 to 17 Taking the motor connected to the connecting rod 32 via the traction rope 322 as an example, the specific working process under this structural mode is as follows:

[0108] In the initial state, such as Figure 13 and Figure 14 As shown, the motor is not started, the connecting rod sealing ring 323 seals the gap between the connecting rod 32 and the water-stopping device 72, and the water-stopping device 72 seals the drain outlet 112. At this time, the elastic member 5 is in a non-energy-storing state.

[0109] When the user presses the flush button, the motor drives the traction rope 322, the push plate 4 is pulled upward, and the elastic member 5 begins to compress and store energy. After the energy storage is completed, the water stop device 72 is opened, and at the same time the motor releases the traction rope 322, the push plate 4 is no longer pulled upward, and the elastic member 5 begins to release and push the push plate 4 downward, thereby opening the drain port 112 and exerting a boosting effect on the water tank 11. Figures 15 to 17 , Figure 15 The figure shows the state where the elastic member 5 is compressed and storing energy, and at this time the water-stop device 72 is not opened. Figure 16 The figure shows the state where the elastic member 5 has completed energy storage. Figure 17The figure shows the released state of the elastic member 5 , at which time the water-stopping device 72 is opened and the drain port 112 starts to drain water.

[0110] When the drainage is completed, the water in the water tank 11 drops to a certain water level, the water stop device 72 falls under the action of gravity and seals the drain outlet 112, completing a flushing process, and the entire device returns to its initial position. Figure 13 and Figure 14 shown.

[0111] This structure utilizes an upper sealing elastic member driven by an energy storage motor, enhancing flushing performance by applying elastic potential energy to push plate 4. The gravity-sealed upper seal is less leak-resistant, easier to manufacture, and offers stable performance. Furthermore, in its initial state, the elastic member 5 does not need to be continuously compressed; it can be compressed only when flushing is required, effectively extending its service life.

[0112] The above is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention should fall within the scope of protection of the present invention.

Claims

1. A drain valve device, for installation in a water tank having a drain outlet at the bottom, wherein the bottom of the water tank is provided with a drain channel capable of communicating with the drain outlet; characterized in that: The drain valve device includes a power device and a push plate, wherein the push plate is located below the drain outlet; the power device includes an elastic member, wherein the elastic member is configured to be compressed under the action of external power to store energy, and to exert elastic force on the push plate when released to push the push plate to move between the drain outlet and the bottom of the drain channel; The drain valve device also includes a piston assembly and a mounting cylinder with closed ends. The mounting cylinder is fixed in the water tank and is provided with a mounting cylinder inlet. The piston assembly is slidably inserted into the mounting cylinder, and its lower end passes through the bottom of the mounting cylinder and is connected to the push plate. The elastic member is sandwiched between the top wall of the mounting cylinder and the upper part of the piston assembly. Under the action of fluid pressure at the mounting cylinder inlet, the piston assembly can be pushed to drive the push plate to move upward, thereby compressing the elastic member. A float assembly is further provided in the water tank and between the drain port and the mounting cylinder. The float assembly can seal the drain port under the action of gravity and can open the drain port under the action of buoyancy. A mounting seat is fixed in the water tank. The mounting seat is a cylindrical structure with an open bottom. The mounting cylinder is fixed on the top of the mounting seat, and the lower end of the piston assembly passes through the top surface of the mounting seat. The float assembly includes a float, a first sealing ring and a second sealing ring. The float is an annular structure and is spaced apart on the outside of the piston assembly, and the float is located in the mounting seat and a gap is left between the float and the inner wall of the mounting seat; the first sealing ring is arranged at the bottom end of the float, and the second sealing ring is arranged in the middle of the inner ring surface of the float, and the inner ring hole of the second sealing ring constitutes the water outlet of the float; the first sealing ring can be sealed and fitted with the port of the drain outlet, and the second sealing ring can be sealed and fitted with the upper part of the push plate.

2. The drain valve device according to claim 1, wherein: An exhaust hole is provided on the top of the mounting tube; A pressure relief hole is also provided at the bottom of the mounting tube, and the pressure relief hole can be in an open state when the push plate moves downward.

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