Flushing system

Abstract

The invention provides a flushing system. The flushing system comprises a delay switch valve. The time-delay switch valve comprises a time-delay valve body, a plugging piece, a pressure relief piece and a driving piece. The time delay valve body is provided with a water inlet channel, a water outlet channel, a back pressure cavity and a pressure relief cavity. And a water outlet of the water inlet channel and a water inlet of the water outlet channel are communicated with the backpressure cavity. The back pressure cavity and the pressure relief cavity are provided with communicating holes, and the pressure relief cavity is further provided with a drainage hole. And the plugging piece is movably mounted in the back pressure cavity to form a pilot valve structure. The pressure relief piece is provided with a plugging rod which is inserted into the backpressure cavity from the communicating hole, and the plugging rod is provided with a pressure relief section and a sealing section. The driving piece is installed in the pressure relief cavity and pushes the pressure relief piece. According to the time-delay switch valve adopted by the flushing system provided by the invention, the pressure relief piece can enable the back pressure cavity to form multiple switching actions of pressure relief and closing, so that the flushing system can form multi-section independent water outlet by one flushing operation in a pure mechanical switch structure mode.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen and bathroom, in particular to a flushing system. Background Art

[0002] At present, the flushing system of smart toilets on the market is mostly connected to the municipal water supply pipe through a pulse valve, or connected to the toilet tank through a water pump. When flushing, the pulse valve or water pump works to form multiple independent water outputs, such as brush ring water, main flush water, supplementary water, etc. Smart toilets provide consumers with automatic flushing, but when the power is off or the electronic components are damaged, the toilet cannot be flushed and cannot be used normally, which brings troubles to the user. For this reason, the present invention provides a flushing system, including a pure mechanical switch, which can still be flushed manually even if the power is off or the electronic switch is damaged. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a flushing system capable of manually discharging multiple independent water stages.

[0004] A flushing system includes a time-delay switch valve, specifically, The time-delay switch valve comprises a time-delay valve body, a blocking member, a pressure relief member, and a driving member, wherein: The time delay valve body is provided with a water inlet channel, a water outlet channel, a back pressure chamber and a pressure relief chamber. The water outlet of the water inlet channel and the water inlet of the water outlet channel are arranged close to each other and are both connected to the back pressure chamber. The back pressure chamber and the pressure relief chamber are provided with a connecting hole, and the pressure relief chamber is also provided with a drainage hole.

[0005] The plugging member is movably installed in the back pressure cavity and divides the back pressure cavity into two mutually isolated areas. One side of the plugging member is connected to the water outlet of the water inlet channel and the water inlet of the water outlet channel, and the other side is connected to the connecting hole. The plugging member is also provided with an overflow hole connecting the two areas within the water outlet range of the water inlet channel. The plugging member movably connects or blocks the water inlet channel and the water outlet channel.

[0006] The pressure relief component is movably installed in the pressure relief chamber, and is provided with a blocking rod inserted from the connecting hole into the back pressure chamber. The diameter of the blocking rod is smaller than the connecting hole, and a plurality of spaced-apart sealing sections are provided on the periphery along the axial direction, and the blocking rod forms a pressure relief section on both sides of the sealing section. The pressure relief component moves and blocks the connecting hole through the sealing section, or the sealing section is staggered from the connecting hole and the connecting hole is opened. A pre-tightened first spring is provided between the pressure relief component and the delay valve body, and the first spring provides a reset force for the pressure relief component to return to the initial state. In the initial state, the outermost sealing section of the pressure relief component close to the end of the blocking rod blocks the connecting hole.

[0007] One end of the driving member is arranged in the pressure relief chamber, and pushes the blocking rod to further insert into the back pressure chamber.

[0008] The back pressure chamber and the blocking member constitute a pilot valve structure in an existing toilet flushing system. When the flushing system is connected to a water circuit, water enters the water inlet channel and is injected into the back pressure chamber through the overflow hole. The blocking member blocks the water inlet channel in the initial state.

[0009] During flushing, the driving member pushes the pressure relief member, and the sealing rod of the pressure relief member is further inserted into the back pressure chamber. After the driving member is released, the pressure relief member is gradually reset under the action of the first spring. During the resetting process, when the pressure relief section and the sealing section on the sealing rod pass through the connecting hole between the sealing member and the pressure relief member in turn, the back pressure chamber forms a pressure relief and sealing state in turn, and then the sealing member opens and blocks the water outlet of the water inlet channel in turn, thereby forming a flushing mode in which the delayed switching valve divides one flushing into multiple water outlets.

[0010] The delayed switching valve used in the flushing system provided by the present invention, by providing a pressure relief component with spaced pressure relief sections and sealing sections, can realize the switching action of pressure relief and closure of the back pressure chamber through resetting movement during the flushing process, and can control the number of the above switching actions according to the preset number of pressure relief sections and sealing sections, thereby realizing that the flushing system can form multiple independent water outputs in one flushing operation in a purely mechanical switch structure, so that the toilet can form multiple flushings with different effects.

[0011] Preferably, the elastic driving member is an air bag / hydraulic device, which is installed in the pressure relief chamber and is located on the side of the pressure relief member away from the back pressure chamber. The air bag / hydraulic device is provided with a medium flow hole extending to the outside of the delay valve body. The air bag or hydraulic device is expanded by inputting air / liquid and pushes the pressure relief member close to the back pressure chamber.

[0012] Preferably, a receiving groove is provided at one end of the pressure relief member away from the back pressure chamber, and the driving member is a bellows-shaped air bag, one end of which is installed in the receiving groove and the other end forms a cover for the pressure relief chamber.

[0013] Preferably, in order to slow down the exhaust speed of the airbag after expansion, thereby extending the flushing time, the airbag is also provided with a pressure relief hole extending to the outside of the delay valve body, and the diameter of the pressure relief hole is smaller than the medium flow hole. A one-way valve body is provided in the medium flow hole, or the medium flow hole of the airbag is connected to a manual air pump button, and the manual air pump button adopts a one-way air supply structure of an air pump, so that the airbag can take in air through the medium flow hole with a larger diameter, expand rapidly, improve the flushing sensitivity, and can only discharge air through the pressure relief hole, thereby extending the flushing time and increasing the flushing volume.

[0014] Preferably, the sealing section and the pressure relief section have three sections, and the delayed switching valve divides a flushing into three water outlets with time intervals, namely, a first water outlet, a second water outlet and a third water outlet, and the sealing section corresponding to the time interval between the second water outlet and the third water outlet is longer than the sealing section corresponding to the time interval between the first water outlet and the second water outlet.

[0015] Preferably, a first annular groove is provided at one end of the communicating hole close to the back pressure chamber, and a first sealing ring is installed thereon, wherein the inner diameter of the first sealing ring is between the diameters of the sealing section and the pressure relief section.

[0016] Preferably, the opening of the communicating hole near one end of the back pressure chamber is conical, the end of the blocking rod is provided with a second annular groove and a second sealing ring is installed, and the second sealing ring is tightly attached to the conical opening of the communicating hole when the pressure relief member is in the initial state.

[0017] Preferably, the water outlet of the water inlet channel surrounds the water inlet of the water outlet channel. The blocking member is an elastic rubber pad, the peripheral part of which is fixedly installed on the peripheral wall of the back pressure chamber by pressing, and the middle part simultaneously blocks or opens the water outlet of the water inlet channel and the water inlet of the water outlet channel. A compressed second spring is installed in the back pressure chamber, and the second spring pushes the blocking member to move toward the water outlet of the water inlet channel. A guide rod passing through the overflow hole is provided in the back pressure chamber, and the gap between the guide rod and the overflow hole forms an overflow channel, so that the overflow hole can be enlarged, reducing the difficulty of molding, and also having a guiding function.

[0018] Preferably, in order to form water outlet effects with different functions through multiple independent water outlets, the flushing system further includes an automatic switching valve, which includes a switching valve body and a floating switching member.

[0019] The switching valve body is provided with a water inlet channel, a switching chamber, a first drainage channel and a second drainage channel. The water inlet channel, the first drainage channel and the second drainage channel are connected to the switching chamber through a water inlet, a first drainage port and a second drainage port respectively, and the first drainage port is located at the upper part of the switching chamber.

[0020] The floating switching member is movably installed in the switching cavity, and is provided with a first blocking portion at the upper part and a second blocking portion at the lower part. A locking structure is provided in the floating switching member or between the floating switching member and the switching cavity.

[0021] The floating switching member is away from the first drain port in an initial state when there is no water in the switching cavity, the first drain port is connected to the water inlet, and the second blocking portion faces the second drain port and is in a state of blocking or about to block the second drain port.

[0022] When the switching chamber is filled with water for the first time, the locking structure forms a locking state through hydraulic pushing and restricts the floating switching member from moving upward, and the second blocking portion also blocks the second drain outlet under the action of hydraulic force. At this time, water flows out of the first drain outlet.

[0023] When the switching chamber is in the first water-stop state, the floating switching component floats up through the water stored in the switching chamber and drives the locking structure to unlock. At the same time, the second blocking part opens the second drain outlet, and the first blocking part blocks the first drain outlet, switching the second drain outlet to be connected to the water inlet.

[0024] The second drain outlet discharges water when the switching chamber is in a second water inflow state.

[0025] When the water level in the switching chamber drops during the second water outage in the switching chamber, the floating switching member connects the first drain port with the water inlet, and the second blocking portion faces the second drain port. At this time, the water is switched back to the first drain port when the water is discharged next time.

[0026] When the switching chamber is in the state of water filling for the third time, the locking structure forms a locking state through hydraulic force and restricts the floating switching member from moving upward, the second blocking portion blocks the second drainage port under the action of hydraulic force, and water flows out of the first drainage port. When the switching chamber is in the state of water stopping for the third time, the floating switching member first floats up and then falls and returns to the initial state.

[0027] The automatic switching valve provided by the present invention provides a floating switching component with two blocking parts, which can comprehensively utilize water inlet, water stop, buoyancy and hydraulic power to form a switching action of opening the water outlet between two water inlets, forming a purely mechanical automatic switching valve, which has the advantages of ingenious structure, small size and low cost.

[0028] Preferably, in order to improve the sealing performance of the plugging, the first drain port is arranged at the top of the switching chamber, and the first plugging portion is a plug arranged at the top of the floating switching member.

[0029] The main body of the second blocking part is L-shaped, one end of which is swingably mounted on the bottom of the floating switching member, and the other end of which extends downward to form a baffle, one side of which faces the second drain port, and the other side faces the water inlet. The water inlet is opposite to the second drain port and is located at the bottom of the switching chamber, so that when water enters the water inlet, the water can rush to and push the baffle, allowing the second blocking member to block the second drain port by hydraulic force.

[0030] The second blocking portion is provided with a limiting folding plate bent toward the swinging installation position at the top of the baffle, so that when the second blocking portion swings and opens the second drain outlet to a certain extent, it can support the side wall of the second drain outlet or the installation position, thereby limiting the maximum interlacing angle between the second blocking portion and the second drain outlet.

[0031] Alternatively, the second blocking portion is a flap, the top end of which is swingably mounted on the top of the second drain outlet, and the middle portion of the side facing away from the second drain outlet is swingably mounted on the bottom of the floating switching member through a connecting rod, which can also achieve blocking the second drain outlet before the floating switching member floats up, and opening the second drain outlet after the floating switching member floats up.

[0032] Preferably, it is a streamlined structure, the locking structure is arranged between the second blocking portion and the second drain outlet, a limiting protrusion is provided on the side of the baffle plate facing the second drain outlet, the switching chamber is provided with a limiting groove at the position where the limiting protrusion is located in the initial state, or, the second drain outlet serves as the limiting groove, and the locking structure forms a locked state by the limiting protrusion being snapped into the limiting groove, the structure is simple and easy to form.

[0033] Preferably, the floating switching member further comprises a guide sleeve, which is sleeved on the outer periphery of the main body of the floating switching member. The floating switching member limits the horizontal movement flexibility through the guide sleeve, provides a guide function for the up and down movement of the floating switching member, and avoids the situation of loose sealing. The floating switching member is installed with a second blocking part through a vertical connecting rod. The density of the guide sleeve is greater than that of water, and it is slidably sleeved on the connecting rod up and down. The bottom end of the guide sleeve extends downward and is provided with an unlocking end facing the limit protrusion. When the main body of the switching floating member floats in the water, due to its high density, the guide sleeve will not float up immediately, so that the guide sleeve slides downward relative to the connecting rod, and pushes the limit protrusion downward through the unlocking end, and the limit protrusion is pushed out of the limit groove and unlocked, which can avoid the situation that the limit protrusion cannot be driven to unlock by the pulling force of the floating main body of the floating switching member, and ensures that the locking structure can be unlocked when the switching chamber is in the first water-free state.

[0034] Preferably, the flushing system further comprises a water inlet pipe for connecting to the time-delay switch valve.

[0035] The water inlet pipeline includes an outer tube and an inner tube, the bottom end of the outer tube is provided with an installation port, and the outer periphery of the bottom end is provided with a water outlet joint. The water outlet end of the inner tube is installed into the outer tube through the installation port, and is connected to the water outlet joint through the gap between the outer tube and the inner tube, and the water inlet end of the inner tube extends from the installation port of the outer tube to form a water inlet joint. The water inlet joint is connected to the water outlet channel of the delay switch valve, and the water inlet channel of the delay switch valve is connected to the municipal water supply pipe, so that the flushing system completes flushing through a purely mechanical structure, or the water inlet joint is also provided with a branch joint, and the branch joint is connected to a water pump. At this time, the flushing system can complete flushing through an electronic control method, and when there is a power outage or the water pump is damaged, the flushing can be completed through a purely mechanical structure.

[0036] Preferably, the top of the outer tube is provided with an anti-siphon structure, and the anti-siphon structure includes a water storage cavity and a one-way valve. The water storage cavity is arranged at the top of the outer tube, the bottom of the cavity is provided with a through hole connected to the outer tube, and the top of the cavity is provided with an air inlet. The one-way valve is installed close to the through hole, and blocks the through hole when the water inlet pipe is in the water inlet state, and opens the through hole when the water inlet pipe is not in the water inlet state.

[0037] The anti-siphon structure provided by the present invention can solve the problem of water overflowing from the anti-siphon structure before the one-way valve is completely closed when water is flowing. In addition, when water is cut off and siphon occurs in the water channel, since the water storage chamber is connected to the outside through the air inlet, the one-way valve opens the through hole to destroy the siphon effect in the water channel, thus forming an anti-siphon effect. At the same time, the water collected in the water storage chamber returns to the water channel through the through hole, thus avoiding the problem of water overflow from the water storage chamber. Preferably, an overflow collection port is also provided on the top of the water storage chamber, and is connected to the drainage hole of the delayed switching valve through a pipe, so that the overflow water from the drainage hole of the delayed switching valve can be collected and re-input into the water channel to avoid water leakage inside the toilet.

[0038] From the above description of the present invention, it can be seen that the present invention has the following beneficial effects: The time-delay switch valve used in the flushing system provided by the present invention can realize the switching action of pressure relief and sealing of the back pressure chamber by resetting movement during the flushing process by providing a pressure relief member with a pressure relief section and a sealing section distributed at intervals, and the number of the above switching actions can be controlled according to the preset number of pressure relief sections and sealing sections, thereby realizing that the flushing system can form multiple independent water discharges in one flushing operation in a purely mechanical switch structure, so that the toilet can form multiple flushings with different effects; The driving member adopts an air bag or a hydraulic device, which has a simple structure and is easy to implement; The airbag is provided with a small-sized pressure relief hole, and the medium flow hole only allows air to enter, so that the airbag can enter air through the medium flow hole with a larger diameter, expand rapidly, and improve the flushing sensitivity, and can only release air through the pressure relief hole, thereby extending the flushing time and increasing the flushing volume; The sealing section and the pressure relief section have three sections, and the time-delay switch valve divides one flush into three water discharges with time intervals, namely, the first water discharge, the second water discharge and the third water discharge; in addition, the sealing section corresponding to the time interval between the second water discharge and the third water discharge is longer than the sealing section corresponding to the time interval between the first water discharge and the second water discharge, so that the third water discharge can be made some time after the second flush, which can serve as a water seal on the toilet pot surface; The automatic switching valve provided by the present invention provides a floating switching member with two blocking parts, which can comprehensively utilize water inlet, water stop, buoyancy and hydraulic force to form a switching action of opening the water outlet between two water inlets, forming a purely mechanical automatic switching valve, which has the advantages of ingenious structure, small size and low cost; The main body of the second blocking part is L-shaped, and one end is swingably installed. On the one hand, the structure is simple, and the second drain outlet can be blocked by hydraulic jacking. On the other hand, an eccentric installation method is formed. When the floating switching member floats up, the second blocking part is lifted up and driven away from the second drain outlet through an automatic effect, thereby realizing automatic unlocking of the locking structure, allowing the floating switching member to continue to float up and realize the switching of the water outlet. The guide sleeve is provided to, on the one hand, provide a guide for the up and down movement of the floating switching member to avoid a loose seal; on the other hand, when the floating switching member floats up, the limit protrusion can be actively pushed up to avoid the situation where the limit protrusion cannot be driven to unlock by the pulling force of the floating switching member body floating up, thereby ensuring that the locking structure can be unlocked when the switching chamber is in the first water-free state; If the water inlet end of the water inlet pipe provided by the present invention is directly connected to the municipal water supply pipe, the flushing system can complete the flushing through a purely mechanical structure. If the water inlet end is also provided with a branch joint for connecting to a water pump, the flushing system can complete the flushing through an electronic control mode. When there is a power outage or the water pump is damaged, the flushing can be completed through a purely mechanical structure. The anti-siphon structure of the water inlet pipe provided by the present invention, when water is flowing, before the one-way valve is completely closed, the water overflowing through the through hole enters the water storage chamber, which can solve the problem of water overflowing from the anti-siphon structure. In addition, when water is cut off, when siphon occurs in the water channel, since the water storage chamber is connected to the outside through the air inlet, the one-way valve opens the through hole to destroy the siphon effect in the water channel, forming an anti-siphon effect. At the same time, the water collected in the water storage chamber returns to the water channel through the through hole, avoiding the problem of water overflow from the water storage chamber. An overflow collection port is also provided on the top of the water storage chamber, and is connected to the drainage hole of the delayed switching valve through a pipe, so that the overflow water from the drainage hole of the delayed switching valve can be collected and re-input into the water channel to avoid water leakage inside the toilet. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0040] in: Figure 1It is an axial view of a flushing system (a combination of manual and electric control) Figure 2 This is a cross-sectional view of a flushing system; (purely manual) Figure 3 It is an axial side view of the time-delay switch valve; Figure 4 It is an exploded view of the time-delay switch valve; Figure 5 It is a schematic diagram of the initial state of the delayed switching valve; Figure 6 This is a schematic diagram of the delayed switch valve's airbag being inflated; (first water discharge state) Figure 7 This is a schematic diagram of the delayed switch valve's airbag slowly exhausting air; (the first water outage state) Figure 8 This is a schematic diagram of the delayed switch valve's airbag continuously exhausting air; (second water discharge state) Fig. 9 This is a schematic diagram of the delayed switch valve's airbag continuously venting air; (second water outage state) Fig.10 This is a schematic diagram of the delayed switch valve's airbag continuously exhausting air; (the third water discharge state) Fig.11 This is a schematic diagram of the delayed switch valve's airbag continuously exhausting air; (the third water outage state is the same as the initial state) Fig.12 It is an axial view of the pressure relief component; Fig.13 It is a front view of the pressure relief component; Fig.14 It is a cross-sectional view of the pressure relief component; Fig.15 It is an exploded view of the automatic switching valve; Fig.16 This is a cross-sectional view of an automatic switching valve. Figure 1 ; (Switch the cavity to water-free state) Fig.17 This is a cross-sectional view of an automatic switching valve. Figure 2 ; (Switch to the first water inlet state in the cavity, water flows out from the first water outlet) Fig.18 This is a cross-sectional view of an automatic switching valve. Figure 3 ; (Switch to the first water cut-off state in the cavity, and the locking structure is unlocked) Fig.19 This is a cross-sectional view of an automatic switching valve. Figure 4 ; (The first water cut-off state in the switching chamber, the floating switching part completely floats up, and the first water outlet is blocked) Fig. 20 This is a cross-sectional view of an automatic switching valve. Figure 5; (Switch to the second water inlet state in the chamber, and water will flow out from the second water outlet) Fig.21 This is a cross-sectional view of an automatic switching valve. Figure 6 ; (the second water cut-off state in the switching chamber, the floating switching part moves down) Fig. 22 This is a cross-sectional view of an automatic switching valve. Figure 7 ; (Switch to the second water cut-off state in the chamber, and the first water outlet is opened) Fig.23 This is a cross-sectional view of an automatic switching valve. Figure 8 ; (Switch to the third water inlet state in the chamber, water flows out from the first water outlet) Fig.24 This is a cross-sectional view of another embodiment of the second blocking portion; (a flap structure is adopted, and the second water outlet is open) Fig.25 It is an axial view of the water inlet pipe; Fig.26 It is a cross-sectional view of the water inlet pipe; Fig. 27 About Fig.26 A partial enlarged view of point A; Figures 1 to 27 The symbols in the figure are: delayed switch valve 1, delayed valve body 11, water inlet channel 111, water outlet channel 112, back pressure chamber 113, pressure relief chamber 114, connecting hole 1141, drain hole 1142, blocking member 12, overflow hole 121, second spring 122, guide rod 123, pressure relief member 13, blocking rod 131, sealing section 132, pressure relief section 133, first spring 134, air bag 14, medium flow hole 141, pressure relief hole 142, manual air pump button 143, automatic switching valve 2, switching valve body 21, water inlet channel Channel 211, switching chamber 212, first drainage channel 213, second drainage channel 214, floating switching member 22, first blocking portion 221, second blocking portion 222, limiting folding plate 2221, limiting protrusion 2222, guide sleeve 23, unlocking end 231, water inlet pipe 3, outer tube 31, water outlet joint 311, water storage chamber 312, through hole 3121, air inlet 3122, overflow collection port 3123, one-way valve 313, inner tube 32, water inlet joint 321, branch joint 3211, municipal water supply pipe 4, water pump 5. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Embodiment 1:

[0042] See also Figures 1 to 14, provides a flushing system, including a time-delay switch valve 1, specifically, The time-delay switch valve 1 includes a time-delay valve body 11, a blocking member 12, a pressure relief member 13, and a driving member, wherein: The time delay valve body 11 is provided with a water inlet channel 111, a water outlet channel 112, a back pressure chamber 113 and a pressure relief chamber 114. The water outlet of the water inlet channel 111 and the water inlet of the water outlet channel 112 are arranged close to each other and are both connected to the back pressure chamber 113. The back pressure chamber 113 and the pressure relief chamber 114 are provided with a connecting hole 1141, and the pressure relief chamber 114 is also provided with a drainage hole 1142.

[0043] The plugging member 12 is movably installed in the back pressure chamber 113, and divides the back pressure chamber 113 into two mutually isolated areas. One side of the plugging member 12 is connected to the water outlet of the water inlet channel 111 and the water inlet of the water outlet channel 112, and the other side is connected to the connecting hole 1141. The plugging member 12 is also provided with an overflow hole 121 connecting the two areas within the water outlet range of the water inlet channel 111. The plugging member 12 movably connects or blocks the water inlet channel 111 and the water outlet channel 112. Preferably, the water outlet of the water inlet channel 111 surrounds the water inlet of the water outlet channel 112. The blocking member 12 is an elastic rubber pad, the peripheral part of which is fixedly installed on the peripheral wall of the back pressure cavity 113 by pressing, and the middle part simultaneously blocks or opens the water outlet of the water inlet channel 111 and the water inlet of the water outlet channel 112. A compressed second spring 122 is installed in the back pressure cavity 113, and the second spring 122 pushes the blocking member 12 to move toward the water outlet of the water inlet channel 111. A guide rod 123 passing through the overflow hole 121 is provided in the back pressure cavity 113, and the gap between the guide rod 123 and the overflow hole 121 forms an overflow channel, so that the overflow hole 121 can be enlarged, reducing the difficulty of molding, and also having a guiding function.

[0044] The pressure relief member 13 is movably installed in the pressure relief chamber 114, and is provided with a blocking rod 131 inserted from the communication hole 1141 into the back pressure chamber 113. The diameter of the blocking rod 131 is smaller than the communication hole 1141, and a plurality of sealing sections 132 are arranged at intervals along the axial direction on the periphery, and the blocking rod 131 forms a pressure relief section 133 on both sides of the sealing section 132. The pressure relief member 13 moves and blocks the communication hole 1141 through the sealing section 132, or the sealing section 132 is staggered from the communication hole 1141, and the communication hole 1141 is opened.

[0045] In one embodiment, the end of the communication hole 1141 close to the back pressure chamber 113 is provided with a first annular groove and is installed with a first sealing ring, and the inner diameter of the first sealing ring is between the diameters of the sealing section 132 and the pressure relief section 133. In addition, the opening of the communication hole 1141 close to the back pressure chamber 113 is tapered, and the end of the blocking rod 131 is provided with a second annular groove and is installed with a second sealing ring, and the second sealing ring is tightly attached to the tapered shape of the communication hole 1141 when the pressure relief member 13 is in the initial state, thereby improving the sealing performance of the back pressure chamber 113 in the initial state.

[0046] A pre-tightened first spring 134 is provided between the pressure relief member 13 and the delay valve body 11, and the first spring 134 provides a reset force for the pressure relief member 13 to return to an initial state. In the initial state, the outermost sealing section 132 of the pressure relief member 13 close to the end of the blocking rod 131 blocks the connecting hole 1141.

[0047] One end of the driving member is arranged in the pressure relief chamber 114, and pushes the blocking rod 131 to be further inserted into the back pressure chamber 113. Optionally, the driving member is an airbag or a hydraulic device. For example, the airbag 14 is used in this embodiment. The airbag 14 is installed in the pressure relief chamber 114 and is located on the side of the pressure relief member 13 away from the back pressure chamber 113. In one embodiment, a receiving groove is provided at one end of the pressure relief member 13 away from the back pressure chamber 113. The airbag 14 is in the shape of a bellows, one end of which is installed in the receiving groove, and the other end forms a cover of the pressure relief chamber 114. The airbag 14 is provided with a medium flow hole 141 extending to the outside of the delay valve body 11. The airbag 14 is expanded by being inflated, and pushes the blocking rod 131 to be further inserted into the back pressure chamber 113.

[0048] The back pressure chamber 113 and the blocking member 12 constitute a pilot valve structure in an existing toilet flushing system. When the flushing system is connected to a water circuit, water enters the water inlet channel 111 and is injected into the back pressure chamber 113 through the overflow hole 121. The blocking member 12 blocks the water inlet channel 111 in the initial state.

[0049] During flushing, air is pumped into the airbag 14, the airbag 14 swells and pushes the pressure relief member 13, and the blocking rod 131 of the pressure relief member 13 is further inserted into the back pressure chamber 113. During the exhaust process of the airbag 14, the pressure relief member 13 is gradually reset under the action of the first spring 134. During the resetting process, when the pressure relief section 133 and the sealing section 132 on the blocking rod 131 pass through the connecting hole 1141 between the blocking member 12 and the pressure relief member 13 in turn, the back pressure chamber 113 forms a pressure relief and sealing state in turn, and then the blocking member 12 opens and blocks the water outlet of the water inlet channel 111 in turn, thereby forming a flushing mode in which the delayed switch valve 1 divides one flushing into multiple water outlets. In one embodiment, in order to slow down the exhaust speed of the airbag 14 after expansion, thereby extending the flushing time, the airbag 14 is further provided with a pressure relief hole 142 extending to the outside of the delay valve body 11, and the diameter of the pressure relief hole 142 is smaller than the medium flow hole 141. A one-way valve 313 is provided in the medium flow hole 141, or the medium flow hole 141 of the airbag 14 is connected to a manual air pump button 143, and the manual air pump button 143 adopts a one-way air supply structure of an air pump (inflating the airbag 14 when pressed, and resetting and inhaling air from the outside when released), so that the airbag 14 can take in air through the medium flow hole 141 with a larger diameter, expand rapidly, and improve the flushing sensitivity, and can only discharge air through the pressure relief hole 142, thereby extending the flushing time and increasing the flushing volume.

[0050] On the basis of the above embodiments, in one embodiment, the sealing section 132 and the pressure relief section 133 have three sections, and the time-delay switch valve 1 divides a flush into three water discharges with time intervals, namely, a first water discharge, a second water discharge and a third water discharge, and the sealing section 132 corresponding to the time interval between the second water discharge and the third water discharge is longer than the sealing section 132 corresponding to the time interval between the first water discharge and the second water discharge.

[0051] The time-delay switch valve 1 adopted in the flushing system provided by the present invention, by providing a pressure relief component 13 with spaced pressure relief sections 133 and sealing sections 132, can realize the switching action of pressure relief and closure of the back pressure chamber 113 through resetting movement during the flushing process, and can control the number of the above-mentioned switching actions according to the preset number of pressure relief sections 133 and sealing sections 132, thereby realizing that the flushing system can form multiple independent water outputs in one flushing operation in a purely mechanical switch structure, so that the toilet can form multiple flushings with different effects. Embodiment 2:

[0052] See also Figures 1 to 23 In order to form water outlet effects with different functions by forming multiple independent water outlets, the flushing system also includes an automatic switching valve 2, which includes a switching valve body 21 and a floating switching member 22.

[0053] The switching valve body 21 is provided with a water inlet channel 211, a switching chamber 212, a first drainage channel 213 and a second drainage channel 214. The water inlet channel 211, the first drainage channel 213 and the second drainage channel 214 are connected to the switching chamber 212 through the water inlet, the first drainage port and the second drainage port respectively, and the first drainage port is located at the upper part of the switching chamber 212.

[0054] The floating switching member 22 is movably installed in the switching cavity 212 up and down, and is provided with a first blocking portion 221 at the upper part and a second blocking portion 222 at the lower part. A locking structure is provided between the floating switching member 22 and the switching cavity 212 .

[0055] To improve the sealing performance of the plugging, in a specific embodiment, the first drain port is disposed at the top of the switching chamber 212 , and the first plugging portion 221 is a plug disposed at the top of the floating switching member 22 .

[0056] Preferably, the main body of the second blocking portion 222 is L-shaped, one end of which is swingably mounted at the bottom of the floating switching member 22, and the other end of which extends downward to form a baffle, one side of which faces the second drain port, and the other side of which faces the water inlet. The water inlet is opposite to the second drain port and is located at the bottom of the switching chamber 212, so that when water enters the water inlet, the incoming water can rush toward and push the baffle, allowing the second blocking member 12 to block the second drain port by hydraulic force. In addition, the second blocking portion 222 is provided with a limiting folding plate 2221 bent toward the swinging installation position at the top of the baffle, so that when the second blocking portion 222 swings and opens the second drain port to a certain extent, it can support the side wall of the second drain port or the installation position, thereby limiting the maximum interlacing angle between the second blocking portion 222 and the second drain port.

[0057] Alternatively, see Fig.24 In other embodiments, the second blocking portion 222 is a flap, the top end of which is swingably mounted on the top of the second drain outlet, and the middle part of the side facing away from the second drain outlet is swingably mounted with the bottom of the floating switching member 22 through a connecting rod. Similarly, the second drain outlet can be blocked before the floating switching member 22 floats, and the second drain outlet can be opened after the floating switching member 22 floats. It should be noted that when the flap blocks the second drain outlet, the pulling force of the connecting rod on the flap acts on the middle part of the flap and obliquely upward, while the pushing force of the hydraulic force on the flap acts on the entire flap and is vertical. At this time, the effect of the hydraulic force on the flap is much greater than the effect of the connecting rod on opening the flap. The flap is locked under the action of the hydraulic force and is close to the second drain outlet.

[0058] In one embodiment, the locking structure is swingably mounted on the floating switching member 22, with one side opposite to the water inlet and the other side opposite to the wall of the switching chamber 212 and provided with a limiting protrusion 2222. The switching chamber 212 is provided with a limiting groove at the initial position of the limiting protrusion 2222. The locking structure is locked by the limiting protrusion 2222 being snapped into the limiting groove. The structure is simple and easy to form.

[0059] On the basis of the above embodiment, in order to simplify the structure, the locking structure is arranged between the second blocking portion 222 and the second drain outlet, and the limiting protrusion 2222 is arranged on the side of the baffle plate facing the second drain outlet, thereby reducing one swinging component, and the second drain outlet serves as the limiting groove, thereby reducing the setting of one groove.

[0060] In other embodiments, the floating switching member 22 further includes a guide sleeve 23, which is sleeved on the outer periphery of the main body of the floating switching member 22. The floating switching member 22 limits the flexibility of movement in the horizontal direction through the guide sleeve 23, provides a guide for the up and down movement of the floating switching member 22, and avoids the situation of loose sealing. Preferably, the floating switching member 22 is installed with the second blocking portion 222 through a connecting rod in the vertical direction. The density of the guide sleeve 23 is greater than that of water, and it is slidably sleeved on the connecting rod up and down. The bottom end of the guide sleeve 23 extends downward, and is provided with an unlocking end 231 facing the limit protrusion 2222. When the main body of the switching floating member floats in the water, due to its high density, the guide sleeve 23 will not float up immediately, so that the guide sleeve 23 slides downward relative to the connecting rod and pushes the limiting protrusion 2222 downward through the unlocking end 231. The limiting protrusion 2222 is pushed out of the limiting groove and unlocked, which can avoid the situation where the limiting protrusion 2222 cannot be unlocked by relying solely on the pulling force of the floating switching member 22 main body, thereby ensuring that the locking structure can be unlocked when the switching chamber 212 is in the first water-stop state.

[0061] When using: The floating switching member 22 is away from the first drain port in the initial state without water in the switching chamber 212, the first drain port is connected to the water inlet, and the second blocking portion 222 faces the second drain port and is in a state of blocking or about to block the second drain port.

[0062] When the switching chamber 212 is filled with water for the first time, the locking structure forms a locking state through hydraulic pushing and restricts the floating switching member 22 from moving upward, while the second blocking portion 222 also blocks the second drain outlet under the action of hydraulic force. At this time, water flows out of the first drain outlet.

[0063] When the switching chamber 212 is in the first water outage state, the floating switching member 22 floats up through the water stored in the switching chamber 212 and drives the locking structure to unlock. At the same time, the second blocking portion 222 opens the second drain outlet, and the first blocking portion 221 blocks the first drain outlet, switching the second drain outlet to be connected to the water inlet.

[0064] The second drain outlet discharges water when the switching chamber 212 is in the second water inflow state.

[0065] When the water level in the switching chamber 212 drops when the switching chamber 212 is in the second water-stop state, the floating switching member 22 connects the first drain port with the water inlet, and the second blocking portion 222 faces the second drain port. At this time, the water is switched back to the first drain port when the water is discharged next time.

[0066] When the switching chamber 212 is in the state of water filling for the third time, the locking structure forms a locking state through hydraulic force and restricts the floating switching member 22 from moving upward. The second blocking portion 222 blocks the second drainage port under the action of hydraulic force, and water flows out of the first drainage port. When the switching chamber 212 is in the state of water stopping for the third time, the floating switching member 22 first floats up and then falls and returns to the initial state.

[0067] The first water inlet, the second water inlet and the third water inlet are provided by the delayed switching valve 1 in the embodiment.

[0068] The automatic switching valve 2 provided by the present invention provides a floating switching member 22 with two blocking parts, which can comprehensively utilize water inlet, water stop, buoyancy and hydraulic power to form a switching action of opening the water outlet between two water inlets, forming a purely mechanical automatic switching valve 2, which has the advantages of ingenious structure, small size and low cost. Embodiment three:

[0069] See also Figures 1 to 27 On the basis of the first or second embodiment, a flushing system is provided, which also includes a water inlet pipe 3 for connecting to the delayed switching valve 1.

[0070] The water inlet pipe 3 includes an outer tube 31 and an inner tube 32. The bottom end of the outer tube 31 is provided with an installation port, and the outer periphery of the bottom end is provided with a water outlet joint 311. The water outlet end of the inner tube 32 is installed in the outer tube 31 through the installation port, and communicates with the water outlet joint 311 through the gap between the outer tube 31 and the inner tube 32. The water inlet end of the inner tube 32 extends from the installation port of the outer tube 31 and forms a water inlet joint 321. The water inlet joint 321 is connected to the water outlet channel 112 of the time delay switch valve 1, and the water inlet channel 111 of the time delay switch valve 1 is connected to the municipal water supply pipe 4, so that the flushing system completes the flushing through a purely mechanical structure, or the water inlet joint 321 is further provided with a branch joint 3211, and the branch joint 3211 is connected to a water pump 5. At this time, the flushing system can complete the flushing through an electric control method, and when there is a power outage or the water pump 5 is damaged, the flushing can be completed through a purely mechanical structure.

[0071] In another embodiment, the top of the outer tube 31 is provided with an anti-siphon structure, and the anti-siphon structure includes a water storage chamber 312 and a one-way valve 313. The water storage chamber 312 is provided at the top of the outer tube 31, and a through hole 3121 connected to the outer tube 31 is provided at the bottom of the chamber, and an air inlet 3122 is provided at the top of the chamber. The one-way valve 313 is installed near the through hole 3121, and blocks the through hole 3121 when the water inlet pipe 3 is in the water inlet state, and opens the through hole 3121 when the water inlet pipe 3 is in the water out state.

[0072] On the basis of the above embodiment, an overflow collection port 3123 is also provided on the top of the water storage chamber 312, and is connected to the drainage hole 1142 of the delay switch valve 1 through a pipe, so that the overflow water of the drainage hole 1142 of the delay switch valve 1 can be collected and re-input into the water channel to avoid water leakage inside the toilet.

[0073] The anti-siphon structure provided by the present invention, when water is flowing, before the one-way valve 313 is completely closed, the water overflowing through the through hole 3121 enters the water storage chamber 312, which can solve the problem of water overflowing from the anti-siphon structure. In addition, when the water is cut off, when siphon occurs in the water channel, since the water storage chamber 312 is connected to the outside through the air inlet 3122, the one-way valve 313 opens the through hole 3121, destroys the siphon effect in the water channel, and forms an anti-siphon effect. At the same time, the water collected in the water storage chamber 312 returns to the water channel through the through hole 3121, avoiding the problem of water overflow from the water storage chamber 312.

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A flushing system, characterized in that: Including a time-delayed switching valve; The time-delay switch valve comprises a time-delay valve body, a blocking member, a pressure relief member, and a driving member; The delay valve body is provided with a water inlet channel, a water outlet channel, a back pressure chamber and a pressure relief chamber; the water outlet of the water inlet channel and the water inlet of the water outlet channel are arranged close to each other and are both connected to the back pressure chamber; the back pressure chamber and the pressure relief chamber are provided with a connecting hole, and the pressure relief chamber is also provided with a drainage hole; The plugging member is movably installed in the back pressure chamber and divides the back pressure chamber into two mutually isolated areas. One side of the plugging member is connected to the water outlet of the water inlet channel and the water inlet of the water outlet channel, and the other side is connected to the connecting hole. The plugging member is also provided with an overflow hole connecting the two areas within the water outlet range of the water inlet channel. The plugging member movably connects or blocks the water inlet channel and the water outlet channel. The pressure relief member is movably installed in the pressure relief chamber, and is provided with a blocking rod inserted from the communicating hole into the back pressure chamber; the diameter of the blocking rod is smaller than the communicating hole, and a plurality of spaced sealing sections are provided at the periphery along the axial direction, and the blocking rod forms pressure relief sections on both sides of the sealing sections; the pressure relief member moves and blocks the communicating hole through the sealing section, or the sealing section is staggered from the communicating hole, and the communicating hole is opened; a pre-tightened first spring is provided between the pressure relief member and the delay valve body, and the first spring provides a reset force for the pressure relief member to restore to an initial state, and in the initial state, the outermost sealing section of the pressure relief member close to the end of the blocking rod blocks the communicating hole; One end of the driving member is arranged in the pressure relief chamber, and pushes the blocking rod to further insert into the back pressure chamber.

2. A flushing system according to claim 1, characterized in that: The driving member is an air bag / hydraulic device, which is installed in the pressure relief chamber and is located on the side of the pressure relief member away from the back pressure chamber. The air bag / hydraulic device is provided with a medium flow hole extending to the outside of the delay valve body. The air bag or hydraulic device is expanded by inputting air / liquid and pushes the pressure relief member close to the back pressure chamber.

3. A flushing system according to claim 1, characterized in that: The pressure relief component is provided with a receiving groove at one end away from the back pressure chamber, and the driving component is a bellows-shaped airbag, one end of which is installed in the receiving groove, and the other end forms a cover for the pressure relief chamber; the airbag is also provided with a pressure relief hole extending to the outside of the delay valve body, and the diameter of the pressure relief hole is smaller than the medium circulation hole; a one-way valve body is provided in the medium circulation hole, or the medium circulation hole of the airbag is connected to a manual inflation button, and the manual inflation button adopts an air pump-type one-way air supply structure.

4. A flushing system according to claim 1, characterized in that: The sealing section and the pressure relief section have three sections, and the delayed switching valve divides a flushing into three water discharges with time intervals, namely, a first water discharge, a second water discharge and a third water discharge, and the sealing section corresponding to the time interval between the second water discharge and the third water discharge is longer than the sealing section corresponding to the time interval between the first water discharge and the second water discharge.

5. A flushing system according to claim 1, characterized in that: The end of the communicating hole close to the back pressure chamber is provided with a first annular groove and is installed with a first sealing ring, and the inner diameter of the first sealing ring is between the diameters of the sealing section and the pressure relief section; the opening of the communicating hole close to the back pressure chamber is tapered, and the end of the blocking rod is provided with a second annular groove and is installed with a second sealing ring, and the second sealing ring is tightly attached to the tapered opening of the communicating hole when the pressure relief member is in the initial state; The water outlet of the water inlet channel surrounds the water inlet of the water outlet channel; the sealing member is an elastic rubber pad, the peripheral part of which is fixedly installed on the peripheral wall of the back pressure chamber by pressing, and the middle part simultaneously blocks or opens the water outlet of the water inlet channel and the water inlet of the water outlet channel; a guide rod passing through the overflow hole is provided in the back pressure chamber, and the gap between the guide rod and the overflow hole forms an overflow channel.

6. A flushing system according to claim 1, characterized in that: The flushing system further comprises an automatic switching valve, wherein the automatic switching valve comprises a switching valve body and a floating switching member; The switching valve body is provided with a water inlet channel, a switching chamber, a first drainage channel and a second drainage channel; the water inlet channel, the first drainage channel and the second drainage channel are connected to the switching chamber through the water inlet, the first drainage port and the second drainage port respectively, and the first drainage port is located at the upper part of the switching chamber; The floating switching member is movably installed in the switching cavity, and is provided with a first blocking portion at the upper part and a second blocking portion at the lower part. A locking structure is provided in the floating switching member or between the floating switching member and the switching cavity. The floating switching member is away from the first drain port in an initial state where there is no water in the switching chamber, the first drain port is connected to the water inlet, and the second blocking portion faces the second drain port; When the switching chamber is in the first water-inflow state, the locking structure forms a locking state through hydraulic force and restricts the floating switching member from moving upward, and the second blocking portion blocks the second drain port under the action of hydraulic force, and water flows out of the first drain port; When the switching chamber is in the first water-stop state, the floating switching member floats up through the water stored in the switching chamber, and drives the locking structure to unlock, the second blocking portion opens the second drain port, the first blocking portion blocks the first drain port, and the second drain port is connected to the water inlet; The second drain outlet discharges water when the switching chamber is in a state of second water inflow; When the floating switching member is in the second water-stop state in the switching chamber, as the water level in the switching chamber moves downward, the first drain port is connected to the water inlet, and the second blocking portion faces the second drain port; When the switching chamber is in water-inflow state for the third time, the locking structure forms a locking state through hydraulic force and restricts the floating switching member from moving upward; the second blocking portion blocks the second drain outlet under the action of hydraulic force, and water flows out of the first drain outlet; when the switching chamber is in water-out state for the third time, the floating switching member first floats up and then falls down and returns to its initial state.

7. A flushing system according to claim 6, characterized in that: The first drain outlet is arranged at the top of the switching chamber, and the first blocking part is a plug arranged at the top of the floating switching member; the water inlet and the second drain outlet are opposite to each other and are located at the bottom of the switching chamber; the main body of the second blocking part is L-shaped, one end is swing-mounted at the bottom of the floating switching member, and the other end extends downward to form a baffle, one side of the baffle faces the second drain outlet, and the other side faces the water inlet, and the second blocking part is provided with a limiting folding plate bent toward the swinging installation position at the top of the baffle, and the second blocking part limits the maximum staggered angle with the second drain outlet through the limiting folding plate; or, the second blocking part is a flap, the top end of which is swing-mounted at the top of the second drain outlet, and the middle part of the side facing away from the second drain outlet is swing-mounted with the bottom of the floating switching member through a connecting rod.

8. A flushing system according to claim 7, characterized in that: The locking structure is arranged between the second blocking portion and the second drain port, a limiting protrusion is arranged on a side of the baffle plate facing the second drain port, and a limiting groove is arranged in the switching chamber at a position where the limiting protrusion is located in an initial state, or the second drain port serves as a limiting groove, and the locking structure forms a locking state by the limiting protrusion being snapped into the limiting groove; The floating switching member also includes a guide sleeve, which is mounted on the outer periphery of the main body of the floating switching member, and the floating switching member limits the flexibility of movement in the horizontal direction through the guide sleeve; the floating switching member is installed with a second blocking part through a vertical connecting rod; the density of the guide sleeve is greater than that of water, and is slidably mounted on the connecting rod up and down, the bottom end of the guide sleeve extends downward, and is provided with an unlocking end facing the limit protrusion, the guide sleeve slides downward relative to the connecting rod, and pushes the limit protrusion downward through the unlocking end, and the limit protrusion withdraws from the limit groove and is unlocked.

9. A flushing system according to claim 1, characterized in that: The flushing system also includes a water inlet pipe, which includes an outer tube and an inner tube. The bottom end of the outer tube is provided with a mounting port, and the outer periphery of the bottom end is provided with a water outlet joint; the water outlet end of the inner tube is installed in the outer tube through the mounting port, and is connected to the water outlet joint through the gap between the outer tube and the inner tube, and the water inlet end of the inner tube extends from the mounting port of the outer tube to form a water inlet joint; the water inlet joint is connected to the water outlet channel of the delay switch valve, and the water inlet channel of the delay switch valve is connected to the municipal water supply pipe, or the water inlet joint is also provided with a branch joint, and the branch joint is connected to a water pump.

10. A flushing system according to claim 9, characterized in that: An anti-siphon structure is provided at the top of the outer tube, and the anti-siphon structure includes a water storage chamber and a one-way valve; the water storage chamber is arranged at the top of the outer tube, a through hole connected to the outer tube is provided at the bottom of the chamber, and an air inlet is provided at the top of the chamber; the one-way valve is installed close to the through hole, and blocks the through hole when the water inlet pipe is in the water-inlet state, and opens the through hole when the water inlet pipe is in the water-stop state; an overflow collection port is also provided at the top of the water storage chamber, and is connected to the drainage hole of the delay switch valve through a pipe.

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