Flushing system

Abstract

The utility model provides a flushing system which 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 utility model, 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 utility model relates to kitchen and bath technical field especially a flush system. BACKGROUND

[0002] The flush system of the intelligent closestool on the market at present is mostly connected with the municipal water supply pipe through the pulse valve or connected with the closestool water tank through the water pump, and the pulse valve or the water pump works when flushing, thereby multiple independent water outlets such as circle water, main flushing water and supplementary water can be formed. The intelligent closestool provides automatic flushing for consumers, but when power failure or electronic components are damaged, the closestool cannot flush, cannot be used normally and brings troubles to the user. Therefore, the utility model provides a flush system, which comprises a pure mechanical switch, so that manual flushing can be realized even if power failure or electronic switch damage occurs. SUMMARY

[0003] The utility model discloses a kind of flush systems that can manually form multiple independent water outlets to solve the above technical problems.

[0004] A flush system, comprising a delay switch valve, specifically,

[0005] The delay switch valve comprises a delay valve body, a blocking member, a pressure relief member and a driving member, wherein,

[0006] The delay valve body is provided with a water inlet channel, a water outlet channel, a back pressure cavity and a pressure relief cavity. 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 cavity. The back pressure cavity and the pressure relief cavity are provided with a communication hole, and the pressure relief cavity is further provided with a drain hole.

[0007] The blocking member is movably installed in the back pressure cavity and divides the back pressure cavity into two areas that are isolated from each other. One side of the blocking 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 communication hole. The blocking member is further provided with an overflow hole that connects the two areas within the range of the water outlet of the water inlet channel. The blocking member can move to connect or block the water inlet channel and the water outlet channel.

[0008] The pressure relief member is movably installed in the pressure relief cavity and is provided with a blocking rod that is inserted into the back pressure cavity from the communication hole. The diameter of the blocking rod is smaller than that of the communication hole, and the peripheral part of the blocking rod is provided with a plurality of sealing segments that are spaced apart along the axial direction. The blocking rod forms pressure relief segments on both sides of the sealing segments. The pressure relief member can move to block the communication hole through the sealing segments, or the sealing segments are staggered with the communication hole, and the communication hole is opened. A pre-tightened first spring is provided between the pressure relief member and the delay valve body. The first spring provides a restoring force to the pressure relief member to return to the initial state. In the initial state, the outermost sealing segment near the end of the blocking rod blocks the communication hole.

[0009] The driving member is arranged at one end of the pressure relief cavity and pushes the plugging rod to further insert into the back pressure cavity.

[0010] The back pressure cavity and the plugging member constitute a pilot valve structure in the existing toilet flushing system, when the flushing system is connected to the water channel, water flows into the water inlet channel and injects into the back pressure cavity through the overflow hole, and the plugging member blocks the water inlet channel in the initial state.

[0011] During flushing, the driving member pushes the pressure relief member, the plugging rod of the pressure relief member further inserts into the back pressure cavity, after the driving member is released, the pressure relief member gradually resets under the action of the first spring, and during the resetting process, the pressure relief section and the sealing section on the plugging rod pass through the communication hole between the plugging member and the pressure relief member in turn, the back pressure cavity forms pressure relief and sealing states in turn, and then the plugging member opens and blocks the water outlet of the water inlet channel in turn, so that the delay switch valve divides the one-time flushing into the flushing mode of multiple water outlets.

[0012] The delay switch valve of the flushing system can realize the switching action of the back pressure cavity forming pressure relief and closure through resetting movement in the flushing process, the number of the above switching actions can be controlled according to the number of the preset pressure relief section and the sealing section, and then the flushing system can realize the mode of forming multiple independent water outlets through one-time flushing operation in the pure mechanical switch structure, so that the toilet can form multiple flushing with different effects.

[0013] Preferably, the elastic driving member is a gas bag / liquid pressure device, which is installed in the pressure relief cavity and located at the side of the pressure relief member away from the back pressure cavity, the gas bag / liquid pressure device is provided with a medium flow hole extending to the outside of the delay valve body, the gas bag or the liquid pressure device expands by inputting air / liquid and pushes the pressure relief member close to the back pressure cavity.

[0014] Preferably, the end of the pressure relief member away from the back pressure cavity is provided with a containing groove, the driving member is a corrugated gas bag, one end of which is installed in the containing groove, and the other end forms the cover of the pressure relief cavity.

[0015] Preferably, in order to slow down the exhaust speed of the gas bag after expansion, thereby prolonging the flushing time, the gas bag is also provided with a pressure relief hole extending to the outside of the delay valve body, the diameter of the pressure relief hole is smaller than that of the medium flow hole, and the medium flow hole is provided with a one-way valve body, or the medium flow hole of the gas bag is connected with a manual inflation button, the manual inflation button adopts a one-way air feeding structure of a pump type, so that the gas bag can input air through the medium flow hole with a larger caliber, expand rapidly, improve the flushing sensitivity, and only exhaust through the pressure relief hole, prolong the flushing time and increase the flushing amount.

[0016] Preferably, the sealing section and pressure relief section have three sections, the time-delay switch valve divides the first flush into three times of water discharge with time interval, the time interval between the second time of water discharge and the third time of water discharge corresponds to a sealing section longer than the time interval between the first time of water discharge and the second time of water discharge.

[0017] Preferably, the communication hole is provided with a first annular groove near one end of the back pressure cavity, and is provided with a first sealing ring, the inner diameter of the first sealing ring is between the diameters of the sealing section and the pressure relief section.

[0018] Preferably, the opening of the communication hole near one end of the back pressure cavity is tapered, the end of the plugging rod is provided with a second annular groove, and is provided with a second sealing ring, the second sealing ring is in close contact with the tapered opening of the communication hole when the pressure relief member is in the initial state.

[0019] Preferably, the water outlet of the water inlet channel surrounds the water inlet of the water outlet channel. The plugging member is an elastic rubber pad, the periphery is fixedly installed on the peripheral wall of the back pressure cavity by pressing, the middle part simultaneously blocks or opens the water outlet of the water inlet channel and the water inlet of the water outlet channel, the back pressure cavity is provided with a compressed second spring, the second spring pushes the plugging member to move towards the water outlet of the water inlet channel. The back pressure cavity is provided with a guide rod passing through the overflow hole, the gap between the guide rod and the overflow hole forms an overflow channel, so that the overflow hole can be made larger, the molding difficulty is reduced, and the guide function is also provided.

[0020] Preferably, in order to form different water discharge effects with different functions for multiple independent water discharges, the flush system further comprises an automatic switching valve, the automatic switching valve comprises a switching valve body and a floating switching member.

[0021] The switching valve body is provided with a water inlet channel, a switching cavity, a first water outlet channel and a second water outlet channel. The water inlet channel, the first water outlet channel and the second water outlet channel are communicated with the switching cavity through the water inlet, the first water outlet and the second water outlet respectively, and the first water outlet is located at the upper part of the switching cavity.

[0022] The floating switching member is movably installed in the switching cavity, and the upper part is provided with a first blocking part, and the lower part is provided with a second blocking part, and the floating switching member is provided with a locking structure or between the floating switching member and the switching cavity.

[0023] In the initial state without water in the switching cavity, the floating switching member is away from the first water outlet, the first water outlet and the water inlet are communicated, the second blocking part faces the second water outlet, and is in a state of blocking or about to block the second water outlet.

[0024] When the switching chamber is filled with water for the first time, the locking structure forms a locked state by the push of water force, and restricts the upward movement of the floating switching component. At the same time, the second sealing part also blocks the second drain outlet under the action of water force. At this time, water flows out of the first drain outlet.

[0025] When the switching chamber is shut off for the first time, the floating switching component floats up due to the water stored in the switching chamber, which unlocks the locking structure. At the same time, the second sealing part opens the second drain outlet, while the first sealing part blocks the first drain outlet, switching the second drain outlet and the water inlet to be connected.

[0026] The second drain outlet discharges water during the second water inlet state of the switching chamber.

[0027] When the water level in the switching chamber drops during the second water outage, the floating switching component connects the first drain outlet and the inlet, and the second sealing part faces the second drain outlet. At this time, the water will switch back to the first drain outlet during the next water outage.

[0028] In the third water-inlet state of the switching chamber, the locking structure forms a locked state through hydraulic force, restricting the upward movement of the floating switching component. The second sealing part blocks the second drain outlet under hydraulic action, and water exits from the first drain outlet. In the third water-stop state of the switching chamber, the floating switching component first floats up and then falls back to its initial state.

[0029] The automatic switching valve provided by this utility model provides a floating switching component with two sealing parts, which can comprehensively utilize water inlet, water stop, buoyancy and hydraulic force to form a switching action of opening the outlet between two water inlets, forming a purely mechanical automatic switching valve with the advantages of ingenious structure, small size and low cost.

[0030] Preferably, to improve the sealing performance of the plug, the first drain outlet is located at the top of the switching chamber, and the first plug is a plug located at the top of the floating switching component.

[0031] The main body of the second sealing part is L-shaped, with one end swinging and mounted on the bottom of the floating switching member, and the other end extending downward to form a baffle. One side of the baffle faces the second drain outlet, and the other side faces the inlet. The inlet and the second drain outlet are opposite each other and located at the bottom of the switching chamber, so that when water enters through the inlet, the water can rush towards and push against the baffle, allowing the second sealing member to seal the second drain outlet by hydraulic force.

[0032] The second sealing part has a limiting baffle plate at the top of the baffle that bends toward the swing installation position. So when the second sealing part swings and opens the second drain to a certain extent, it can press against the side wall of the second drain or the installation position, thereby limiting the maximum cross angle between the second sealing part and the second drain.

[0033] Alternatively, the second blocking part is a flap, the top end of which is swingably installed at the top of the second drain port, and the middle of the back side of the flap is swingably installed with the bottom of the floating switch by a connecting rod, so that the second drain port can be blocked when the floating switch floats and opened when the floating switch floats.

[0034] Preferably, to simplify the structure, the locking structure is arranged between the second blocking part and the second drain port, the side of the flap facing the second drain port is provided with a limiting protrusion, the switch cavity is provided with a limiting slot at the position of the limiting protrusion in the initial state, or the second drain port serves as the limiting slot, and the locking structure is in the locked state by being clamped into the limiting slot, so that the structure is simple and easy to form.

[0035] Preferably, the floating switch further comprises a guide sleeve, the guide sleeve is sleeved on the outer periphery of the main body of the floating switch, the floating switch is limited in horizontal movement by the guide sleeve, the guide sleeve provides a guiding effect for the upward and downward movement of the floating switch, and the situation of not being tightly sealed is avoided. The floating switch is installed with the second blocking part by a vertical connecting rod. The density of the guide sleeve is greater than that of water, and the guide sleeve is slidably sleeved on the connecting rod, the bottom end of the guide sleeve extends downward and is provided with an unlocking end facing the limiting protrusion. When the main body of the floating switch floats in water, the guide sleeve does not immediately float up due to the greater density, so that the guide sleeve slides downward relative to the connecting rod and pushes the limiting protrusion downward through the unlocking end, the limiting protrusion is pushed out of the limiting slot and unlocked, so that the situation that the limiting protrusion cannot be unlocked only by the pulling force of the upward floating of the main body of the floating switch is avoided, and it is ensured that the locking structure can be unlocked in the first water stop state of the switch cavity.

[0036] Preferably, the flushing system further comprises a water inlet pipeline for connecting the time delay switch valve.

[0037] The water inlet pipeline comprises an outer pipe and an inner pipe, the bottom end of the outer pipe is provided with a mounting port, and the outer periphery of the bottom end is provided with a water outlet connector. The water outlet end of the inner pipe is installed into the outer pipe through the mounting port and is connected with the water outlet connector through the gap between the outer pipe and the inner pipe, and the water inlet end of the inner pipe extends out of the mounting port of the outer pipe and forms a water inlet connector. The water inlet connector is connected with the water outlet channel of the time delay switch valve, and the water inlet channel of the time delay switch valve is connected with a municipal water supply pipe, so that the flushing system is completed by a pure mechanical structure, or the water inlet connector is further provided with a branch connector, and the branch connector is connected with a water pump, so that the flushing system can be completed by an electric control mode, and when the power is off or the water pump is damaged, the flushing system can be completed by a pure mechanical structure.

[0038] Preferably, the top end of the outer pipe is provided with an anti-siphon structure, which comprises a water storage cavity and a one-way valve.

[0039] The anti-siphon structure provided by the utility model can solve the problem of water overflow of the anti-siphon structure, and when water is cut off, the one-way valve is opened to destroy the siphon effect in the water channel, thereby forming an anti-siphon effect.

[0040] Preferably, the top of the water storage cavity is further provided with a water overflow collecting port, which is connected to the drain hole of the time-delay switch valve through a pipeline, so that overflow water from the drain hole of the time-delay switch valve can be collected and re-input into the water channel, thereby avoiding water leakage in the toilet.

[0041] From the above description of the utility model, the utility model has the following beneficial effects:

[0042] The time-delay switch valve of the flushing system can realize switching between pressure relief and closure of the back pressure cavity through reset movement during the flushing process, and the number of switching actions can be controlled according to the number of preset pressure relief sections and sealing sections, so that the flushing system can form multiple independent water outlets through one flushing operation in a pure mechanical switch structure mode, thereby enabling the toilet to form multiple flushing processes with different effects.

[0043] The driving member is a gas bag or a hydraulic device, which is simple in structure and easy to realize.

[0044] The gas bag is provided with a small-size pressure relief hole, and the medium flow hole only admits air, so that the gas bag can admit air through the medium flow hole with a large caliber, expand rapidly, improve the flushing sensitivity, and only discharge air through the pressure relief hole, thereby prolonging the flushing time and increasing the flushing amount.

[0045] The sealing section and pressure relief section have three sections, the time-delay switch valve divides one flushing into three times of first water outlet, second water outlet and third water outlet with time interval, and the time interval between the second water outlet and the third water outlet corresponds to a sealing section longer than the time interval between the first water outlet and the second water outlet, so that the third water outlet can be discharged after a period of time after the second flushing, and can be used as a water seal of a toilet bowl;

[0046] The automatic switch valve has the advantages of ingenious structure, small size and low cost.

[0047] The main body of the second sealing part is L-shaped and is swing-mounted at one end, on the one hand, the structure is simple, and the second drain port can be sealed by using the thrust of water force, on the other hand, an eccentric mounting mode is formed, when the floating switch part floats, the second sealing part is lifted up and is driven to move away from the second drain port through an automatic effect, so that the automatic unlocking of the locking structure is realized, and the floating switch part can continue to float and realize the switching of the water outlet.

[0048] The guide sleeve is arranged, on the one hand, to provide a guiding effect for the up-down movement of the floating switch part, and avoid the situation that the sealing is not tight, on the other hand, when the floating switch part floats, the limiting protrusion can be actively pushed, so that the situation that the limiting protrusion cannot be unlocked only by the pulling force of the floating switch part body is avoided, and it is ensured that the locking structure can be unlocked in the first water stop state of the switching cavity.

[0049] The water inlet pipeline is directly connected to the municipal water supply pipe, and the flushing system can complete flushing through a pure mechanical structure, if the water inlet end is also provided with a branch joint for connecting a water pump, the flushing system can complete flushing through an electric control mode, and when power failure or the water pump is damaged, flushing can be completed through a pure mechanical structure.

[0050] The anti-siphon structure of the water inlet pipeline can solve the problem of water overflow of the anti-siphon structure, and when water is cut off, when siphon appears in the water channel, the one-way valve opens the through hole, the siphon effect in the water channel is destroyed, the anti-siphon effect is formed, and the water collected in the water storage cavity is returned to the water channel through the through hole, avoiding the problem of water overflow of the water storage cavity.

[0051] The top of the water storage cavity is also provided with an overflow collecting opening, which is connected to the drain hole of the delay switch valve through a pipeline, so that the overflow water of the drain hole of the delay switch valve can be collected and re-input into the water channel, avoiding the leakage inside the closestool. BRIEF DESCRIPTION OF DRAWINGS

[0052] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0053] In the drawings:

[0054] Figure 1 is a shaft side view of a flushing system; (manual and electric control combination)

[0055] Figure 2 is a sectional view of a flushing system; (pure manual type)

[0056] Figure 3 is a shaft side view of a delay switch valve;

[0057] Figure 4 is an exploded view of a delay switch valve;

[0058] Figure 5 is a schematic view of a delay switch valve in an initial state;

[0059] Figure 6 is a schematic view of a delay switch valve when the air bag is inflated; (first water out state)

[0060] Figure 7 is a schematic view of a delay switch valve when the air bag is slowly deflated; (first water stop state)

[0061] Figure 8 is a schematic view of a delay switch valve when the air bag is continuously deflated; (second water out state)

[0062] Figure 9 is a schematic view of a delay switch valve when the air bag is continuously deflated; (second water stop state)

[0063] Figure 10 is a schematic view of a delay switch valve when the air bag is continuously deflated; (third water out state)

[0064] Figure 11 is a schematic view of a delay switch valve when the air bag is continuously deflated; (third water stop state, same as the initial state)

[0065] Figure 12 is a shaft side view of a pressure relief member;

[0066] Figure 13 is a front view of the pressure relief member;

[0067] Figure 14 is a cross-sectional view of the pressure relief member;

[0068] Figure 15 is an exploded view of the automatic switching valve;

[0069] Figure 16 is a cross-sectional view of the automatic switching valve Figure 1 ; (water-free state in switching chamber)

[0070] Figure 17 is a cross-sectional view of the automatic switching valve Figure 2 ; (first water-in state in switching chamber, water out of first water outlet)

[0071] Figure 18 is a cross-sectional view of the automatic switching valve Figure 3 ; (first water-off state in switching chamber, unlocking of locking structure)

[0072] Figure 19 is a cross-sectional view of the automatic switching valve Figure 4 ; (first water-off state in switching chamber, complete floating of floating switching member, blocking of first water outlet)

[0073] Figure 20 is a cross-sectional view of the automatic switching valve Figure 5 ; (second water-in state in switching chamber, water out of second water outlet)

[0074] Figure 21 is a cross-sectional view of the automatic switching valve Figure 6 ; (second water-off state in switching chamber, downward movement of floating switching member)

[0075] Figure 22 is a cross-sectional view of the automatic switching valve Figure 7 ; (second water-off state in switching chamber, opening of first water outlet)

[0076] Figure 23 is a cross-sectional view of the automatic switching valve Figure 8 ; (third water-in state in switching chamber, water out of first water outlet)

[0077] Figure 24 is a cross-sectional view of another embodiment of the second blocking part; (adopting flap structure, open state of second water outlet)

[0078] Figure 25 is an axial side view of the water inlet pipeline;

[0079] Figure 26 is a cross-sectional view of the water inlet pipeline;

[0080] Figure 27 is aboutFigure 26 A is a local enlarged view of the place;

[0081] Figures 1 to 27 The marks in are respectively: delay switch valve 1, delay valve body 11, water inlet channel 111, water outlet channel 112, back pressure cavity 113, pressure relief cavity 114, communication hole 1141, drain hole 1142, blocking piece 12, overflow hole 121, second spring 122, guide rod 123, pressure relief piece 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 inflation button 143, automatic switching valve 2, switching valve body 21, water inlet channel 211, switching cavity 212, first drain channel 213, second drain channel 214, floating switching piece 22, first blocking part 221, second blocking part 222, limiting flange 2221, limiting protrusion 2222, guide sleeve 23, unlocking end 231, water inlet pipeline 3, outer pipe 31, water outlet connector 311, water storage cavity 312, through hole 3121, air inlet 3122, overflow collection port 3123, one-way valve 313, inner pipe 32, water inlet connector 321, branch connector 3211, municipal water supply pipe 4, water pump 5. DETAILED DESCRIPTION

[0082] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved more clear, explicit, the following will be combined with the drawings and examples, and the utility model will be further described in detail. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model. Example one:

[0083] Please refer to Figures 1 to 14 , provide a flushing system, including delay switch valve 1, specifically,

[0084] The delay switch valve 1 includes delay valve body 11, blocking piece 12, pressure relief piece 13 and driving piece, wherein,

[0085] The delay valve body 11 is provided with water inlet channel 111, water outlet channel 112, back pressure cavity 113 and pressure relief cavity 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 communicated with the back pressure cavity 113. The back pressure cavity 113 and the pressure relief cavity 114 are provided with communication hole 1141, and the pressure relief cavity 114 is further provided with drain hole 1142.

[0086] The blocking member 12 is movably installed in the back pressure cavity 113 and divides the back pressure cavity 113 into two isolated areas. One side of the blocking 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 communication hole 1141. The blocking member 12 is further provided with an overflow hole 121 which connects the two areas in the range of the water outlet of the water inlet channel 111. The blocking member 12 can move to block or open 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 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 towards the water outlet of the water inlet channel 111. A guide rod 123 is provided in the back pressure cavity 113 and passes through the overflow hole 121. 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, the molding difficulty is reduced, and the guide function is also achieved.

[0087] The pressure relief member 13 is movably installed in the pressure relief cavity 114 and is provided with a blocking rod 131 which is inserted into the back pressure cavity 113 from the communication hole 1141. The diameter of the blocking rod 131 is smaller than that of the communication hole 1141, and the peripheral part is provided with a plurality of spaced sealing segments 132 along the axial direction, and the blocking rod 131 forms pressure relief segments 133 on both sides of the sealing segments 132. The pressure relief member 13 moves and blocks the communication hole 1141 through the sealing segments 132, or the sealing segments 132 are misaligned with the communication hole 1141, and the communication hole 1141 is opened.

[0088] In an embodiment, the communication hole 1141 is provided with a first annular groove near one end of the back pressure cavity 113, and a first sealing ring is installed. The inner diameter of the first sealing ring is between the diameters of the sealing segments 132 and the pressure relief segments 133. In addition, the opening of the communication hole 1141 near one end of the back pressure cavity 113 is tapered, the end of the blocking rod 131 is provided with a second annular groove, and a second sealing ring is installed. The second sealing ring tightly contacts the taper 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 cavity 113 in the initial state.

[0089] A pre-tightened first spring 134 is provided between the pressure relief member 13 and the delay valve body 11, which provides a restoring force for the pressure relief member 13 to return to the initial state. In the initial state, the outermost sealing segment 132 near the end of the blocking rod 131 blocks the communication hole 1141.

[0090] The driving member is arranged in the pressure relief cavity 114 at one end and pushes the plugging rod 131 to further insert into the back pressure cavity 113. Optionally, the driving member is a gas bag or a hydraulic device. In this embodiment, a gas bag 14 is used. The gas bag 14 is arranged in the pressure relief cavity 114 and located at the side of the pressure relief member 13 away from the back pressure cavity 113. In one embodiment, the end of the pressure relief member 13 away from the back pressure cavity 113 is provided with a receiving groove. The gas bag 14 is in the form of a bellows and one end is arranged in the receiving groove and the other end forms the cover of the pressure relief cavity 114. The gas bag 14 is provided with a medium flow hole 141 extending to the outside of the delay valve body 11. The gas bag 14 is inflated by pumping and pushes the plugging rod 131 to further insert into the back pressure cavity 113.

[0091] The back pressure cavity 113 and the plugging member 12 constitute a pilot valve structure in the existing toilet flushing system. When the flushing system is connected to the water supply, water flows into the water inlet channel 111 and is injected into the back pressure cavity 113 through the overflow hole 121. The plugging member 12 blocks the water inlet channel 111 in the initial state.

[0092] During flushing, the gas bag 14 is pumped and expands to push the pressure relief member 13. The plugging rod 131 of the pressure relief member 13 further inserts into the back pressure cavity 113. During the deflation of the gas bag 14, the pressure relief member 13 gradually resets under the action of the first spring 134. During the resetting process, the pressure relief section 133 and the sealing section 132 on the plugging rod 131 pass through the communication hole 1141 between the plugging member 12 and the pressure relief member 13 in sequence. The back pressure cavity 113 forms a pressure relief and sealing state in sequence. The plugging member 12 opens and blocks the water outlet of the water inlet channel 111 in sequence, thereby forming the delay switch valve 1 to divide the flushing into multiple water discharges. In one embodiment, in order to slow down the deflation speed of the gas bag 14 after inflation and thereby prolong the flushing time, the gas bag 14 is further provided with a pressure relief hole 142 extending to the outside of the delay valve body 11. The diameter of the pressure relief hole 142 is smaller than that of the medium flow hole 141. A one-way valve 313 is arranged in the medium flow hole 141, or the medium flow hole 141 of the gas bag 14 is connected to a manual pumping button 143. The manual pumping button 143 adopts a pumping cylinder type one-way air supply structure (pumping air into the gas bag 14 when pressed and resetting and inhaling air from the outside when released). Therefore, the gas bag 14 can inflate rapidly by inhaling air through the medium flow hole 141 with a larger diameter to improve the flushing sensitivity and can deflate by discharging air through the pressure relief hole 142 to prolong the flushing time and increase the flushing volume.

[0093] On the basis of the above-mentioned embodiments, in an embodiment, the sealing section 132 and the pressure relief section 133 have three sections, the time-delayed on-off valve 1 divides one flushing into three times of first water outflow, second water outflow and third water outflow with time intervals, and the time interval between the second water outflow and the third water outflow corresponds to a sealing section 132 longer than a sealing section 132 corresponding to the time interval between the first water outflow and the second water outflow.

[0094] The time-delayed on-off valve 1 of the flushing system can realize switching actions of forming pressure relief and closure of the back pressure cavity 113 through reset movement in the flushing process, and the number of times of the above-mentioned switching actions can be controlled according to the number of the preset pressure relief sections 133 and sealing sections 132, so that the flushing system can realize multiple independent water outflows through pure mechanical on-off structure mode through one flushing operation, thereby enabling the closestool to form multiple flushing with different functions. Embodiment two:

[0095] Please refer to Figures 1 to 23 In order to form water outflow effects with different functions through multiple independent water outflows, the flushing system further comprises an automatic switching valve 2, and the automatic switching valve 2 comprises a switching valve body 21 and a floating switching piece 22.

[0096] The switching valve body 21 is provided with a water inlet channel 211, a switching cavity 212, a first water outlet channel 213 and a second water outlet channel 214. The water inlet channel 211, the first water outlet channel 213 and the second water outlet channel 214 are respectively communicated with the switching cavity 212 through a water inlet, a first water outlet and a second water outlet, and the first water outlet is located at the upper part of the switching cavity 212.

[0097] The floating switching piece 22 is movably installed in the switching cavity 212, and the upper part is provided with a first plugging part 221, and the lower part is provided with a second plugging part 222, and the floating switching piece 22 and the switching cavity 212 are provided with a locking structure.

[0098] In order to improve the sealing property of plugging, in a specific embodiment, the first water outlet is arranged at the top of the switching cavity 212, and the first plugging part 221 is a plug arranged at the top of the floating switching piece 22.

[0099] Preferably, the main body of the second blocking part 222 is L-shaped, one end is swingingly mounted at the bottom of the floating switching member 22, and the other end extends downward to form a baffle, one side of the baffle faces the second drain port, and the other side faces the water inlet port. The water inlet port and the second drain port are opposite and located at the bottom of the switching cavity 212, so that when water enters the water inlet port, the water can rush to and push the baffle, and the second blocking part 12 is blocked by water power to block the second drain port. In addition, the second blocking part 222 is provided with a limiting folded plate 2221 at the top of the baffle, which is bent to the swing mounting position, so that when the second blocking part 222 swings and opens the second drain port to a certain extent, it can abut against the side wall of the second drain port or the mounting position, thereby limiting the maximum intersection angle of the second blocking part 222 and the second drain port.

[0100] Alternatively, please refer to Figure 24 In other embodiments, the second blocking part 222 is a flap, the top end is swingingly mounted at the top of the second drain port, and the middle of the side facing away from the second drain port is swingingly mounted with the bottom of the floating switching member 22 through a connecting rod. Similarly, it can be realized that the second drain port is blocked when the floating switching member 22 floats, and the second drain port is opened when the floating switching member 22 floats. It should be noted that when the second drain port is blocked by the flap, the pulling force of the connecting rod on the flap acts on the middle of the flap and is inclined upward, and the water power on the flap acts on the entire flap and is perpendicular. At this time, the water power against the flap is much greater than the action of the connecting rod on the flap to open the flap, and the flap forms a locked state under the action of water power and tightly abuts against the second drain port.

[0101] In an embodiment, the locking structure is swingingly mounted on the floating switching member 22, one side faces the water inlet port, and the other side faces the wall of the switching cavity 212 and is provided with a limiting protrusion 2222. The switching cavity 212 is provided with a limiting groove at the position of the limiting protrusion 2222 in the initial state, and the locking structure is locked by the limiting protrusion 2222 clamped into the limiting groove. The structure is simple and easy to form.

[0102] On the basis of the above embodiments, in order to simplify the structure, the locking structure is arranged between the second blocking part 222 and the second drain port, the side of the baffle facing the second drain port is provided with the limiting protrusion 2222, thereby reducing one swing component, and the second drain port serves as the limiting groove, thereby reducing the setting of one groove.

[0103] In other embodiments, the floating switch 22 further comprises a guide sleeve 23, which is sleeved on the outer periphery of the main body of the floating switch 22. The floating switch 22 is limited in horizontal movement flexibility by the guide sleeve 23, which provides a guide for the upward and downward movement of the floating switch 22, thereby avoiding the situation of poor sealing. Preferably, the floating switch 22 is installed with a second sealing part 222 through a vertical connecting rod. The guide sleeve 23 has a density greater than water and is slidably sleeved on the connecting rod. The bottom end of the guide sleeve 23 extends downward and is provided with an unlocking end 231 facing the limiting protrusion 2222. When the main body of the floating switch floats in water, the guide sleeve 23 does not immediately float up due to its greater density, 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 that the limiting protrusion 2222 cannot be unlocked by the pulling force of the floating switch 22 body alone, and ensures that the locking structure can be unlocked in the first water-stopping state of the switching cavity 212.

[0104] In use:

[0105] In the initial state of the floating switch 22 in the switching cavity 212 without water, the floating switch 22 is away from the first water outlet, the first water outlet and the water inlet are connected, and the second sealing part 222 faces the second water outlet and is in a state of sealing or about to seal the second water outlet.

[0106] In the first water-in state of the switching cavity 212, the locking structure is locked by the water thrust and limits the upward movement of the floating switch 22, and the second sealing part 222 also seals the second water outlet under the action of water, at this time, the first water outlet discharges water.

[0107] In the first water-stopping state of the floating switch 22 in the switching cavity 212, the floating switch 22 is floated by the water stored in the switching cavity 212 and unlocks the locking structure, at the same time, the second sealing part 222 opens the second water outlet, and the first sealing part 221 seals the first water outlet, and the second water outlet and the water inlet are connected.

[0108] In the second water-in state of the switching cavity 212, the second water outlet discharges water.

[0109] In the second water-stopping state of the floating switch 22 in the switching cavity 212, the floating switch 22 moves downward with the water level in the switching cavity 212, the first water outlet and the water inlet are connected, and the second sealing part 222 faces the second water outlet, at this time, it is switched back to the first water outlet to discharge water in the next water discharge.

[0110] In the third water-inlet state of the switching chamber 212, the locking structure forms a locked state through hydraulic force, restricting the upward movement of the floating switching member 22. The second sealing part 222 blocks the second drain outlet under hydraulic action, and water flows out of the first drain outlet. In the third water-stop state of the switching chamber 212, the floating switching member 22 first floats up and then falls back to its initial state.

[0111] The first, second, and third water inlets mentioned above are provided by the time-delay switching valve 1 in the embodiment.

[0112] The automatic switching valve 2 provided by this utility model provides a floating switching component 22 with two sealing parts, which can comprehensively utilize water inlet, water stop, buoyancy and hydraulic force to form a switching action of opening the 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. Example 3:

[0113] Please see Figures 1 to 27 Based on Embodiment 1 or Embodiment 2, a flushing system is provided, which further includes a water inlet pipe 3 for connecting to the time-delay switch valve 1.

[0114] The water inlet pipe 3 includes an outer pipe 31 and an inner pipe 32. The bottom end of the outer pipe 31 is provided with an installation port, and the outer periphery of the bottom end is provided with a water outlet connector 311. The water outlet end of the inner pipe 32 is inserted into the outer pipe 31 through the installation port and connects to the water outlet connector 311 through the gap between the outer pipe 31 and the inner pipe 32. The water inlet end of the inner pipe 32 extends out from the installation port of the outer pipe 31 to form a water inlet connector 321. The water inlet connector 321 is connected to the water outlet channel 112 of the time-delay switch valve 1. 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 flushing through a purely mechanical structure. Alternatively, the water inlet connector 321 is also provided with a branch connector 3211, which is connected to a water pump 5. In this case, the flushing system can complete flushing through an electronic control method, and when there is a power outage or the water pump 5 is damaged, it can complete flushing through a purely mechanical structure.

[0115] In another embodiment, the top end of the outer pipe 31 is provided with an anti-siphon structure, which includes a water storage chamber 312 and a one-way valve 313. The water storage chamber 312 is located at the top end of the outer pipe 31, with a through hole 3121 communicating with the outer pipe 31 at the bottom and an air inlet 3122 at the top. 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 supply state, and opens the through hole 3121 when the water inlet pipe 3 is stopped.

[0116] Based on the above embodiments, the top of the water storage chamber 312 is also provided with an overflow collection port 3123, which is connected to the drain hole 1142 of the time delay switch valve 1 through a pipe, so that the overflow water from the drain hole 1142 of the time delay switch valve 1 can be collected and reintroduced into the water channel to avoid water leakage inside the toilet.

[0117] The anti-siphon structure provided by this utility model allows water overflowing through the through hole 3121 into the water storage chamber 312 before the one-way valve 313 is completely closed during water supply, thus solving the problem of water overflowing from the anti-siphon structure. In addition, when water supply is cut off, if a siphon occurs in the water channel, the water storage chamber 312 is connected to the outside through the air inlet 3122, and the one-way valve 313 opens the through hole 3121, disrupting the siphon effect in the water channel and forming 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, preventing the water storage chamber 312 from overflowing.

[0118] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0119] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0120] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0121] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0122] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0123] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A flushing system, characterized in that The delay switch valve comprises a 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 cavity and a pressure relief cavity. The water outlet of the water inlet channel and the water inlet of the water outlet channel are arranged close to each other and both communicate with the back pressure cavity. The back pressure cavity and the pressure relief cavity are provided with a communication hole, and the pressure relief cavity is further provided with a drain hole. The blocking member is movably installed in the back pressure cavity and divides the back pressure cavity into two areas isolated from each other. One side of the blocking member communicates with the water outlet of the water inlet channel and the water inlet of the water outlet channel, and the other side communicates with the communication hole.

2. A flushing system according to claim 1, wherein The blocking member is further provided with an overflow hole in the range of the water outlet of the water inlet channel for communicating the two areas.

3. A flushing system according to claim 1, wherein The pressure relief member is movably installed in the pressure relief cavity and is provided with a blocking rod inserted into the back pressure cavity from the communication hole.

4. A flushing system according to claim 1, wherein The diameter of the blocking rod is smaller than that of the communication hole, and the peripheral part of the blocking rod is provided with a plurality of spaced sealing segments along the axial direction.

5. A flushing system according to claim 1, wherein The pressure relief member moves and blocks the communication hole through the sealing segments, or the sealing segments are staggered with the communication hole, and the communication hole is opened. The first spring between the pressure relief member and the delay valve body provides a restoring force for the pressure relief member to return to the initial state. The outermost sealing segment of the blocking rod close to the end of the pressure relief member blocks the communication hole in the initial state. The driving member is arranged in the pressure relief cavity and pushes the blocking rod to further insert into the back pressure cavity. The driving member is a gas bag / hydraulic device installed in the pressure relief cavity and located on the side of the pressure relief member away from the back pressure cavity. The gas bag / hydraulic device is provided with a medium flow hole extending to the outside of the delay valve body. The gas bag / hydraulic device expands by inputting air / liquid and pushes the pressure relief member close to the back pressure cavity. The end of the pressure relief member away from the back pressure cavity is provided with a receiving groove. The driving member is a corrugated gas bag installed in the receiving groove and forms a cover of the pressure relief cavity at the other end. The gas bag is further provided with a pressure relief hole extending to the outside of the delay valve body. The diameter of the pressure relief hole is smaller than that of the medium flow hole. A one-way valve body is arranged in the medium flow hole, or the medium flow hole of the gas bag communicates with a manual inflation button. The manual inflation button adopts a one-way air supply structure of a pump type. The sealing segment and the pressure relief segment have three segments. The delay switch valve divides the first flush into three times of first water outlet, second water outlet and third water outlet with time intervals. The end of the communication hole close to the back pressure cavity is provided with a first annular groove and is installed with a first sealing ring. The inner diameter of the first sealing ring is between the diameters of the sealing segment and the pressure relief segment. The opening of the end of the communication hole close to the back pressure cavity is conical. The end of the blocking rod is provided with a second annular groove and is installed with a second sealing ring. The second sealing ring tightly contacts the conical opening of the communication 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 inlet channel; the sealing member is an elastic rubber pad, the peripheral part is fixedly installed on the peripheral wall of the back pressure cavity by pressing, and the middle part simultaneously seals or opens the water outlet of the water inlet channel and the water inlet of the water inlet channel; the back pressure cavity is provided with a guide rod penetrating through the overflow hole, and the gap between the guide rod and the overflow hole forms an overflow channel.

6. A flushing system according to claim 1, wherein The flushing system further comprises an automatic switching valve, and 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 cavity, a first water outlet channel and a second water outlet channel; the water inlet channel, the first water outlet channel and the second water outlet channel are communicated with the switching cavity through a water inlet, a first water outlet and a second water outlet respectively, and the first water outlet is located at the upper part of the switching cavity; The floating switching member is movably installed in the switching cavity, and the upper part is provided with a first sealing part, and the lower part is provided with a second sealing part; the floating switching member is provided with a locking structure or between the floating switching member and the switching cavity; In the initial state of the floating switching member in the switching cavity without water, the first water outlet is communicated with the water inlet, and the second sealing part faces the second water outlet; In the first water inlet state of the switching cavity, the locking structure is formed by water force to form a locking state and limit the upward movement of the floating switching member, the second sealing part seals the second water outlet under the action of water force, and the first water outlet discharges water; In the first water stop state of the switching cavity, the floating switching member is floated by the water stored in the switching cavity, and the locking structure is unlocked, the second sealing part opens the second water outlet, the first sealing part seals the first water outlet, and the second water outlet is communicated with the water inlet; The second water outlet discharges water in the second water inlet state of the switching cavity; In the second water stop state of the switching cavity, the floating switching member moves downward with the water level in the switching cavity, the first water outlet is communicated with the water inlet, and the second sealing part faces the second water outlet; In the third water inlet state of the switching cavity, the locking structure is formed by water force to form a locking state and limit the upward movement of the floating switching member, the second sealing part seals the second water outlet under the action of water force, and the first water outlet discharges water; in the third water stop state of the switching cavity, the floating switching member is floated first and then falls to restore the initial state.

7. A flushing system according to claim 6, wherein The first water outlet is arranged at the top of the switching cavity, the first sealing part is a plug arranged at the top of the floating switching member; the water inlet and the second water outlet are opposite and located at the bottom of the switching cavity; the main body of the second sealing part is L-shaped, one end is swingably installed 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 water outlet, and the other side faces the water inlet; the second sealing part is provided with a limiting folded plate bent to the swing installation position at the top of the baffle, and the second sealing part limits the maximum stagger angle with the second water outlet through the limiting folded plate; or the second sealing part is a flap, the top end is swingably installed at the top of the second water outlet, and the middle part of the side facing away from the second water outlet is swingably installed with the bottom of the floating switching member through a connecting rod.

8. A flushing system according to claim 7, wherein, The locking structure is arranged between the second sealing part and the second drain port, one side of the baffle plate is provided with a limiting protrusion facing the second drain port, the switching cavity is provided with a limiting slot at the position where the limiting protrusion is located in the initial state, or the second drain port serves as the limiting slot, and the locking structure forms a locking state by being clamped into the limiting slot through the limiting protrusion; The floating switching piece further comprises a guide sleeve, the guide sleeve is sleeved on the outer periphery of the main body of the floating switching piece, and the floating switching piece is limited in horizontal movement flexibility through the guide sleeve; the floating switching piece is installed with the second sealing part through a vertical connecting rod; the guide sleeve has a density greater than water, and is slidably sleeved on the connecting rod in an up-down direction; the bottom end of the guide sleeve extends downward and is provided with an unlocking end facing the limiting protrusion; the guide sleeve slides downward relative to the connecting rod, and the unlocking end pushes the limiting protrusion downward; the limiting protrusion exits the limiting slot and is unlocked.

9. A flushing system according to claim 1, wherein, The flushing system further comprises a water inlet pipeline, the water inlet pipeline comprises an outer pipe and an inner pipe, the bottom end of the outer pipe 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 pipe is installed into the outer pipe through the mounting port and is connected with the water outlet joint through the gap between the outer pipe and the inner pipe; the water inlet end of the inner pipe extends out of the mounting port of the outer pipe and forms a water inlet joint; the water inlet joint is connected with the water outlet channel of the time-delay switch valve, the water inlet channel of the time-delay switch valve is connected with a municipal water supply pipe, or the water inlet joint is further provided with a branch joint, and the branch joint is connected with a water pump.

10. A flushing system according to claim 9, wherein, The top end of the outer pipe is provided with an anti-siphon structure, the anti-siphon structure comprises a water storage cavity and a one-way valve; the water storage cavity is arranged at the top end of the outer pipe, the bottom of the cavity is provided with a through hole connected with the outer pipe, 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 in the water inlet state of the water inlet pipeline and opens the through hole in the water stop state of the water inlet pipeline; the top of the water storage cavity is further provided with a water overflow collecting port and is connected with the drain hole of the time-delay switch valve through a pipeline.

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