A flush and storage switching assembly for a mechanical flush valve

Abstract

The utility model discloses a kind of flush and water storage switching switch subassembly for mechanical flush valve, belong to closestool technical field, including control piston, piston cavity, switching shell and switching piston, the control piston is slidably connected in the piston cavity, the water inlet end of the switching shell is connected with the water outlet end of the piston cavity, the switching piston is slidably connected in the switching shell, the switching shell is provided with the first flow channel connected with water storage tank, and the second flow channel connected with drain pipe;Control piston as core driving component, reciprocating motion under the action of water pressure and spring determines the timing of entire flush cycle. The design realizes full mechanical control, without any electronic components and external power, energy saving and high reliability, long service life. At the same time, all core components are integrated in piston cavity and switching shell, compact structure, easy to install and maintain.

Description

Technical Field

[0001] This utility model relates to the field of toilet technology, and in particular to a mechanical flush valve for switching between flushing and water storage. Background Technology

[0002] As a core component of modern toilets, the mechanical flush valve's primary function is to reliably switch between flushing and water storage modes. Current technologies commonly employ either independent solenoid valves or diaphragm valves directly driven by water pressure. Solenoid valve solutions require a continuous power supply, posing a risk of circuit failure and increasing product cost and energy consumption. Pure water pressure-driven solutions, on the other hand, are highly sensitive to water pressure fluctuations; low water pressure may lead to weak or failed switching, while high water pressure can cause water hammer, damaging components.

[0003] Existing technologies generally suffer from insufficient precision in switching timing control, failing to ensure the optimal working sequence of water storage followed by flushing. This may result in discontinuous flushing water flow, insufficient flushing force, or flushing starting before water storage is complete, affecting the user experience and causing water waste. Summary of the Invention

[0004] To address the aforementioned problems, this utility model aims to solve the problems described above. One objective of this utility model is to provide a flushing and water storage switching assembly for a mechanical flushing valve that solves the above problems, providing a purely mechanical switching assembly that is simple in structure, does not rely on electricity, is less affected by water pressure, and can accurately control the switching sequence.

[0005] The present invention adopts the following solution: a mechanical flushing valve flushing and water storage switching switch assembly, including a control piston, a piston chamber, a switching housing and a switching piston, wherein the control piston is slidably connected in the piston chamber, the water inlet end of the switching housing is connected to the water outlet end of the piston chamber, the switching piston is slidably connected in the switching housing, and the switching housing is provided with a first flow channel connected to a water storage tank and a second flow channel connected to a drain pipe; The control piston is provided with a control hole. When the control piston slides, the control hole controls the switching piston to slide, and the switching piston closes the first flow channel or the second flow channel.

[0006] A preferred technical solution is that the control piston rod end is provided with a switching piston chamber, the side wall of the switching piston chamber is provided with a first control hole and a second control hole, the end of the switching piston chamber is provided with a pressure balance chamber, the pressure balance chamber is connected to the water storage tank, the side wall of the pressure balance chamber is provided with a third control hole, and when the control piston slides, one of the first control hole, the second control hole and the third control hole alternately connects to the control end of the switching piston.

[0007] A preferred technical solution is that the switching piston control end is provided with a control channel communicating with it, the piston chamber end is provided with a control end cap, the control piston rod end passes through the control end cap and is slidably connected with it, the side wall of the control end cap is communicating with the control channel, and when the control piston slides, the first control hole, the second control hole, and the third control hole are alternately communicating with the control channel.

[0008] A preferred technical solution is that the control end cap is provided with two control sealing rings, the control channel is located between the two control sealing rings, the control sealing rings are in contact with the outer wall of the switching piston chamber, and when the first control hole, the second control hole, and the third control hole move between the two control sealing rings, they communicate with the control channel, and the distance between the two control holes is greater than the distance between the two control sealing rings.

[0009] A preferred technical solution is that the switching housing is provided with a switching slide cavity, the piston part of the switching piston is slidably connected in the switching slide cavity, the control channel is connected to the switching slide cavity, when the control channel is connected to the second control hole, the switching piston slides under the action of water pressure, and a switching spring is sleeved on the switching piston, and when the water pressure disappears, the switching piston is reset under the action of the switching spring.

[0010] A preferred technical solution is that the end of the switching piston is provided with a sealing head, and the middle of the switching piston is provided with a water passage notch. When the switching piston moves upward under the action of water pressure, the sealing head blocks the first flow channel, and the water flows into the second flow channel from the water passage notch. When the switching piston is reset, the sealing head blocks the second flow channel.

[0011] Compared with the prior art, the flushing and water storage switching switch assembly of the mechanical flushing valve of this utility model has the following technical effects: 1. This application discloses a flushing and water storage switching assembly for a mechanical flushing valve, comprising a control piston, a piston chamber, a switching housing, and a switching piston. The control piston is slidably connected in the piston chamber. The inlet end of the switching housing is connected to the outlet end of the piston chamber. The switching piston is slidably connected in the switching housing. The switching housing has a first flow channel connected to a water storage tank and a second flow channel connected to a drain pipe. The control piston, as the core driving component, determines the timing of the entire flushing cycle through its reciprocating motion under water pressure and spring action. The switching piston, as the actuating component, directly controls the final flow direction of the water within the switching housing. This functional separation design allows the control piston to focus on its precise stroke control, while the switching piston is specifically responsible for opening and closing the valve port. The two are linked by a hydraulic signal. This design achieves fully mechanical control, requiring no electronic components or external power, resulting in energy saving, high reliability, and long service life. Furthermore, all core components are integrated within the piston chamber and switching housing, resulting in a compact structure that facilitates installation and maintenance.

[0012] The control piston is equipped with control holes. When the control piston slides, the control holes control the switching piston to slide, and the switching piston closes either the first or second flow channel. The control holes on the control piston are essentially movable control valves. As the control piston slides to different positions, these control holes sequentially open or close the hydraulic passages leading to the control end of the switching piston. This design strongly correlates the switching action with the mechanical position of the control piston, achieving extremely precise timing control. It ensures that during the flushing cycle, the predetermined procedure of first opening the first flow channel to fill the water tank, then switching to the second flow channel for powerful flushing, and finally closing the channel must be strictly followed. This mandatory sequence avoids malfunctions caused by water pressure fluctuations, fundamentally solving the problem of inaccurate switching timing in existing technologies, ensuring the stability and consistency of each flushing effect, and optimizing water-saving performance.

[0013] Other features and advantages of the present invention will become clear when reading the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0015] Figure 1This is a schematic diagram of the overall structure of the flushing and water storage switching switch assembly for the mechanical flushing valve provided in a specific embodiment of this utility model.

[0016] In the picture: 1. Water storage tank; 3. Drain pipe; 6. Control piston; 66. Switching piston chamber; 661. Pressure balance chamber; 67. Control hole; 612. Piston chamber; 671. First control hole; 672. Second control hole; 673. Third control hole; 71. Control channel; 72. Switching outer shell; 73. Switching piston; 74. Switching spring; 77. Switching slide; 701. First flow channel; 702. Second flow channel; 703. Control end cap; 704. Control sealing ring; 705. Sealing head; 706. Water passage notch. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0018] The following description, in conjunction with the accompanying drawings and embodiments, details the flushing and water storage switching assembly for the mechanical flushing valve.

[0019] like Figure 1As shown, a mechanical flushing valve assembly for switching between flushing and water storage includes a control piston 6, a piston chamber 612, a switching housing 72, and a switching piston 73. The control piston 6 is slidably connected in the piston chamber 612. The inlet end of the switching housing 72 is connected to the outlet end of the piston chamber 612. The switching piston 73 is slidably connected in the switching housing 72. The switching housing 72 has a first flow channel 701 connected to a water storage tank 1 and a second flow channel 702 connected to a drain pipe 3. The control piston 6, as the core drive and command unit, defines the time axis of the entire flushing cycle through its reciprocating motion under water pressure and a return spring. The switching piston 73, as the execution unit, is directly installed inside the switching housing 72 and is responsible for controlling the final distribution path of the water flow. The outlet end of the piston chamber 612 provides a high-pressure water source for the entire switching assembly, while the switching housing 72 is responsible for guiding this water source to the water storage tank 1 or the drain pipe 3 according to the command. This functionally separated architecture allows the control piston 6 to focus on completing its precise timing stroke without directly bearing the fluid impact forces generated during flow channel switching; simultaneously, the switching piston 73 can be specifically designed for sealing and flow channel optimization. Both are linked via hydraulic signals rather than mechanical linkages, resulting in flexible layout and high reliability. The entire system is fully mechanical, without any electronic components, making it energy-efficient and long-lasting.

[0020] The control piston 6 is provided with a control hole 67. When the control piston 6 slides, the control hole 67 controls the switching piston 73 to slide, and the switching piston 73 closes the first flow channel 701 or the second flow channel 702. This is the core control mechanism of the present invention. The control hole 67 on the control piston 6 is essentially a movable hydraulic control valve. As the control piston 6 moves to different preset positions in the piston chamber 612, these control holes 67 will sequentially open or close the hydraulic passage leading to the control end of the switching piston 73, thereby issuing a forward or reset command to the switching piston 73. This design strongly correlates the flow channel switching action with the mechanical position of the control piston 6, achieving absolutely precise timing control. It forces the system to follow a predetermined procedure: first, water is stored in the water tank 1, i.e., the first flow channel 701 is opened; then, during spray flushing, the second flow channel 702 is opened; and finally, it is closed. This mechanical logic fundamentally eliminates malfunctions or timing chaos caused by water pressure fluctuations, ensuring the stability and consistency of each flushing effect, while achieving efficient utilization of water resources.

[0021] A preferred technical solution for constructing a multi-state hydraulic control system is that the control piston 6 has a switching piston chamber 66 at its rod end. The side wall of the switching piston chamber 66 has a first control hole 671 and a second control hole 672. The end of the switching piston chamber 66 has a pressure balance chamber 661, which communicates with the water storage tank 1. The side wall of the pressure balance chamber 661 has a third control hole 673. When the control piston 6 slides, one of the first control hole 671, the second control hole 672, or the third control hole 673 alternately communicates with the control end of the switching piston 73. The switching piston chamber 66 and the pressure balance chamber 661 inside the control piston 6 constitute a multi-state hydraulic signal generator. Initially, none of the control holes 671 communicate with the control channel 71. When flushing, the control piston 6 slides, causing the first control hole 671 to communicate with the control channel 71, and the second control hole 672 to communicate with the water tank, balancing the pressure on both sides of the switching piston 73. Water is then added to the water storage tank 1. When the control piston 6 continues to slide until the second control hole 672 connects with the control channel 71, the first control hole 671 connects with the water inlet pipe. Because the water level in the storage tank 1 is low and the water outlet pipe is releasing pressure to the control piston 6, the pressure is insufficient to activate the switching piston 73, and water storage continues during this stage. When the control piston 6 moves to its lowest point, the third control hole 673 connects with the control channel 71, balancing the pressure on both sides of the switching piston 73 again. When the control piston 6 resets, until the second control hole 672 connects with the control channel 71, water pressure enters from the first control hole 671 through the water outlet pipe, and the hydraulic pressure in the storage tank 1 rises, thus opening the switching piston 73 and initiating the flushing stage. The control piston 6 continues to reset until the first control hole 671 connects with the control channel 71. At this point, the pressure of the switching piston 73 balances with the water tank 1, and the switching piston 73 resets under the action of the spring, entering the water tank's refilling state, until no control hole 67 connects with the control channel 71, at which point water storage stops. This makes the control of the switching piston 73 extremely precise and smooth. In particular, the design of pressure relief through the pressure balance chamber 661 replaces the method of forcibly pushing back with water pressure, which greatly eliminates the water hammer effect at the moment of switching, protects the components, significantly reduces noise, and ensures the rapid and reliable reset action of the switching piston 73.

[0022] The preferred technical solution for the hydraulic signal selection and isolation mechanism is that the control end of the switching piston 73 is provided with a control channel 71 communicating with it, and the end of the piston chamber 612 is provided with a control end cap 703. The rod end of the control piston 6 passes through the control end cap 703 and is slidably connected to it. The side wall of the control end cap 703 is connected to the control channel 71. When the control piston 6 slides, the first control hole 671, the second control hole 672, and the third control hole 673 alternately communicate with the control channel 71. The control end cap 703 is provided with two control sealing rings 704, and the control channel 71 is located between the two control sealing rings 704. The control sealing rings 704 are in contact with the outer wall of the switching piston chamber 66. When the first control hole 671, the second control hole 672, and the third control hole 673 move between the two control sealing rings 704, they communicate with the control channel 71. The distance between the two control holes 671 is greater than the distance between the two control sealing rings 704. The control cap 703 and the two control seals 704 together constitute a precision hydraulic selector switch. The two control seals 704 slide on the control piston 6 rod, defining an isolated control signal area between them. The control channel 71 on the side wall of the control cap 703 communicates with this signal area and leads to the control end of the switching piston 73. Only when a control hole 67 moves between the two seals as the control piston 6 moves can the pressure signal represented by that control hole 67 be transmitted to the switching piston 73 through the control channel 71.

[0023] Because the spacing between the control holes 67 is greater than the spacing between the two sealing rings, it ensures that at any given time, only one control hole 67 is located within the signal area and connected to the control channel 71, effectively preventing hydraulic signal short circuits and command conflicts caused by simultaneous conduction of the high-pressure hole and the pressure relief hole. This mechanical selection structure is simple and inexpensive, yet achieves extremely high control accuracy and reliability. It perfectly converts the linear motion of the control piston 6 into discrete, non-interfering hydraulic control commands, a key technical feature that ensures the entire switching sequence is executed accurately according to design.

[0024] The driving and resetting mechanism of the actuator is as follows: the switching housing 72 is provided with a switching slide cavity 77, the piston part of the switching piston 73 is slidably connected in the switching slide cavity 77, the control channel 71 is connected to the switching slide cavity 77, and when the control channel 71 is connected to the second control hole 672, the switching piston 73 slides under the action of water pressure. A switching spring 74 is sleeved on the switching piston 73, and when the water pressure disappears, the switching piston 73 resets under the action of the switching spring 74. The switching piston 73 adopts a hydraulically driven, spring-reset working mode. When high-pressure water is introduced into the control channel 71 and fills the control end of the switching slide cavity 77, the force generated by the water pressure is much greater than the preload of the switching spring 74, thereby reliably pushing the switching piston 73 to the working position. When the control channel 71 is connected to the pressure balance chamber 661, the water pressure at the control end of the switching slide cavity 77 disappears rapidly. At this time, the compressed switching spring 74 releases its elastic potential energy and becomes the dominant force, driving the switching piston 73 to reset stably and quickly. The spring reset mechanism is independent of the inlet water pressure, thus ensuring the effective reset of the switching piston 73 even under extremely low water pressure, significantly improving the system's adaptability to fluctuations in supply water pressure. This hydraulically driven spring reset mode, combined with the aforementioned pressure relief design, makes the entire switching process smooth, gentle, and shock-free, further enhancing the product's durability and quietness.

[0025] The integrated dual-channel switching structure technology solution includes a sealing head 705 at the end of the switching piston 73 and a water passage 706 in the middle of the switching piston 73. When the switching piston 73 moves upward under water pressure, the sealing head 705 blocks the first channel 701, and water flows into the second channel 702 through the water passage 706. When the switching piston 73 returns to its original position, the sealing head 705 blocks the second channel 702. This design achieves the control of two channels with one switching piston 73. Different parts of the switching piston 73 function differently in different positions: In flushing mode: When the switching piston 73 moves upward under water pressure, the sealing head 705 at its lower part rises and blocks the first channel 701 leading to the water storage tank 1. Simultaneously, the water passage 706 in its middle moves to align with the inlet of the second channel 702, and high-pressure water flows through the water passage 706 into the second channel 702, flowing towards the drain pipe 3. Water storage state: The switching piston 73 resets under the action of the spring, its sealing head 705 descends and blocks the inlet of the second flow channel 702. At the same time, the water passage notch 706 moves out, the first flow channel 701 is opened, and water flows into the water storage tank 1. This structure realizes dual control with one valve, and completes the switching of two flow paths simply and efficiently with the reciprocating motion of one part. When one is open, the other must be closed. The design of the water passage notch 706 ensures a wide flushing water flow channel and low fluid resistance; while the direct mechanical seal of the sealing head 705 ensures reliable shut-off and eliminates concerns about leakage. The entire mechanism has a compact structure, few parts, highly integrated functions, low manufacturing cost, and reliable performance.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes that element.

[0027] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. The utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A flushing and water storage switching assembly for a mechanical flushing valve, characterized in that: It includes a control piston, a piston chamber, a switching housing, and a switching piston. The control piston is slidably connected in the piston chamber. The water inlet end of the switching housing is connected to the water outlet end of the piston chamber. The switching piston is slidably connected in the switching housing. The switching housing is provided with a first flow channel connected to a water storage tank and a second flow channel connected to a drain pipe. The control piston is provided with a control hole. When the control piston slides, the control hole controls the switching piston to slide, and the switching piston closes the first flow channel or the second flow channel.

2. The flushing and water storage switching switch assembly for the mechanical flushing valve as described in claim 1, characterized in that: The control piston rod end is provided with a switching piston chamber, the side wall of the switching piston chamber is provided with a first control hole and a second control hole, the end of the switching piston chamber is provided with a pressure balance chamber, the pressure balance chamber is connected to the water storage tank, the side wall of the pressure balance chamber is provided with a third control hole, when the control piston slides, one of the first control hole, the second control hole and the third control hole alternately connects to the control end of the switching piston.

3. The flushing and water storage switching switch assembly for the mechanical flushing valve as described in claim 2, characterized in that: The switching piston control end is provided with a control channel communicating with it, and the piston chamber end is provided with a control end cap. The control piston rod end passes through the control end cap and is slidably connected with it. The side wall of the control end cap is communicating with the control channel. When the control piston slides, the first control hole, the second control hole, and the third control hole are alternately communicating with the control channel.

4. The flushing and water storage switching switch assembly for the mechanical flushing valve as described in claim 3, characterized in that: The control end cap is provided with two control sealing rings, and the control channel is located between the two control sealing rings. The control sealing rings are in contact with the outer wall of the switching piston chamber. When the first control hole, the second control hole, and the third control hole move between the two control sealing rings, they communicate with the control channel. The distance between the two control holes is greater than the distance between the two control sealing rings.

5. The flushing and water storage switching switch assembly for a mechanical flushing valve as described in claim 3, characterized in that: The switching housing is provided with a switching slide cavity, and the piston part of the switching piston is slidably connected in the switching slide cavity. The control channel is connected to the switching slide cavity. When the control channel is connected to the second control hole, the switching piston slides under the action of water pressure. A switching spring is sleeved on the switching piston. When the water pressure disappears, the switching piston resets under the action of the switching spring.

6. The flushing and water storage switching switch assembly for a mechanical flushing valve as described in claim 5, characterized in that: The switching piston is provided with a sealing head at its end and a water passage notch in the middle of the switching piston. When the switching piston moves upward under water pressure, the sealing head blocks the first flow channel, and water flows into the second flow channel through the water passage notch. When the switching piston returns to its original position, the sealing head blocks the second flow channel.

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