Toilet flushing device

Abstract

Toilet flushing device, comprising a first water tank, a second water tank and a drain valve; the first water tank is arranged inside the second water tank, and the drain valve is installed at the bottom of the first water tank; an inlet body is provided inside the first water tank, an inlet port of the body is provided on the inlet body, an A inlet cavity, a B inlet cavity and a C inlet cavity communicated with the inlet port of the body, an A valve, a B valve and a C valve respectively corresponding to the three inlet cavities, and an A body outlet, a B body outlet and a C body outlet respectively controlled by the three valves; the A body outlet is connected to the joint for flushing the toilet wall at the upper end of the toilet, the B body outlet is connected to the joint for flushing the S bend at the lower end, and the C body outlet is connected to the joint for replenishing water to the water seal bend; the three valves are all provided with a water stop opening and closing assembly and a connecting rod opening and closing device. It can ensure that the water outlet time of each valve is the same regardless of high or low pressure, and is not affected by the level of water pressure, greatly improving the stability of the product.

Description

Technical Field

[0001] The present invention relates to the field of kitchen and bathroom, and particularly to a toilet flushing device. Background Art

[0002] A tankless toilet is a new type of water-saving toilet that does not have a water tank and directly flushes with urban tap water. The multi-valve water outlet device for a toilet bowl and the multi-valve staged water outlet device for a toilet bowl applied by the applicant on January 19, 2022, have a Venturi tube at the valve water outlet. When replenishing water, the negative pressure is used to drain the water in the water tank, causing the water level in the water tank to drop. High and low water pressures have a greater impact on the water replenishing time. At the same time, because the Venturi tube is designed with a negative pressure port, the water pressure will be reduced, and the water replenishing requirement of the toilet cannot be met at low pressure. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems in the prior art, and provide a toilet flushing device that can ensure that the water outlet time of each valve is the same regardless of high or low water pressure, is not affected by the high or low water pressure, and greatly improves the stability of the product.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A toilet flushing device includes a first water tank, a second water tank, and a drain valve; the first water tank is arranged inside the second water tank, and the drain valve is installed at the bottom of the first water tank; an inlet body is arranged inside the first water tank, and the inlet body is provided with a body inlet, an A inlet cavity, a B inlet cavity, and a C inlet cavity that are communicated with the body inlet, an A valve, a B valve, and a C valve corresponding to the three inlet cavities respectively, and an A body outlet, a B body outlet, and a C body outlet controlled by the three valves respectively; the A body outlet is connected to the joint for flushing the toilet wall at the upper end of the toilet, the B body outlet is connected to the joint for flushing the S bend at the lower end, and the C body outlet is connected to the joint for replenishing water in the water seal bend;

[0006] Each of the three valves is provided with a water stop and opening and closing assembly and a connecting rod opening and closing device. Among them, the A water stop and opening and closing assembly is connected to the connecting rod opening and closing device through a pressure relief valve, and the B and C water stop and opening and closing assemblies are directly connected to the connecting rod opening and closing device. Each set of connecting rod opening and closing devices includes a float, a water stop cup, a screw rod, and a lifting rod. One end of the A lifting rod is connected to the air vent hole of the pressure relief valve, one end of the B and C lifting rods is connected to the water stop and opening and closing assembly, the other ends of the A, B, and C lifting rods are all connected to one end of the screw rod, and the other end of the screw rod is connected to the float, and the float is arranged inside the water stop cup;

[0007] Among them, the A and B water stop cups are connected and communicate with each other. The B water stop cup is provided with a B water stop cup water replenishment inlet, and the bottom of the B water stop cup is provided with an adjustable drainage outlet for the B water stop cup; the C water stop cup is provided with an adjustable drainage outlet for the C water stop cup, and the C body water outlet is provided with a C valve water replenishment outlet. The B water stop cup water replenishment inlet is connected to the C valve water replenishment outlet. When the C valve discharges water, a part of the water flows into the B water stop cup through the C valve water replenishment outlet, so that the B valve closes when the C valve opens. After the B valve closes, the first water tank continues to be replenished with water until the C valve closes.

[0008] The position of the mouth of the B water stop cup is lower than the position of the mouth of the C water stop cup; the front end of the C body water outlet is arranged as a Venturi tube, and the Venturi tube is provided with a C valve negative pressure port, and the C valve negative pressure port is connected to the bottom of the second water tank.

[0009] The position of the B water stop cup water replenishment inlet is higher than the highest water level position of the B water stop cup to prevent siphon when the C valve closes;

[0010] The adjustable drainage outlet for the C water stop cup is used to drain the water in the C water stop cup. By adjusting the size of the hole position, the drainage time of the C water stop cup can be adjusted. The adjustable drainage outlet for the C water stop cup needs to be smaller than the adjustable drainage outlet for the B water stop cup, so that the drainage time of the C water stop cup is longer than that of the B water stop cup.

[0011] The adjustable drainage outlet for the B water stop cup is used to drain the water in the B water stop cup. By adjusting the size of the hole position, the drainage time of the B water stop cup can be adjusted. The adjustable drainage outlet for the B water stop cup needs to be smaller than the C valve water replenishment outlet.

[0012] Specifically, the Venturi tube is provided with a contraction section, a straight tube section and an expansion section arranged in sequence from front to back. It gradually contracts from A to B, the throat from B to C is a short straight tube section, the C valve negative pressure port is arranged at the straight tube section of the throat from B to C, and it gradually expands from C to D.

[0013] The drain valve includes a drain valve base, a drain valve body, a pneumatic drive assembly and a drain valve float; the drain valve body is fixed on the drain valve base, the drain valve base is installed at the drain hole of the first water tank, and the drain valve base is a hollow structure; a central inner tube is provided in the center of the drain valve body, and a drain valve sealing piece for opening and closing the drain hole is provided at the bottom of the inner tube; the pneumatic drive assembly abuts against the top end of the inner tube and is used to drive the inner tube to move up and down. The pneumatic drive assembly is provided with an air inlet, and this air inlet and the air inlet provided by the pressure relief valve are connected to the same air pressure button; the drain valve float is arranged in the inner cavity of the drain valve body, and a float drain hole is provided at the bottom of this inner cavity; both sides of the drain valve float are rotatably connected to the inner cavity of the drain valve body, and the drain valve float and the inner tube can be in contact during the up and down movement through a hook arranged on the side.

[0014] The pneumatic drive assembly includes a sliding vane, an airbag guide sleeve, a tower-shaped airbag, an airbag base, and a guide sleeve bracket; the sliding vane is provided at the top of the airbag guide sleeve, the bottom of the tower-shaped airbag is fixed to the airbag base, and the air intake is provided on the airbag base; the head of the tower-shaped airbag is fixed to the top of the airbag guide sleeve; the airbag base is fixed within the guide sleeve bracket; the airbag guide sleeve is slidably provided outside the guide sleeve bracket; wherein, when the airbag guide sleeve moves upward, the sliding vane pulls the inner core tube upward.

[0015] The drain valve further includes a connection cover and a fixing sleeve; the drain valve sealing piece is clamped between the connection cover and the fixing sleeve; the head of the connection cover is connected to the inner core tube; a convex groove is provided on the side of the inner core tube to cooperate with the groove provided on the drain valve body as a guide.

[0016] A positioning seat is provided inside the drain valve body, shaft holes are provided on both sides of the positioning seat, and rotating shafts inserted into the shaft holes are provided on both sides of the drain valve float, so that the drain valve float swings within the drain valve body; a bracket for installing the pneumatic drive assembly is provided on the side of the drain valve base.

[0017] The pressure relief valve is provided with an air intake and is connected to the pressure button through a one-way valve; the pressure relief valve further includes a pressure relief valve body, a pump diaphragm, a push rod, and a resilient silicone sealing piece; the pressure relief valve body is provided with a receiving cavity and a communicating cavity, and a pressure relief hole is provided between the receiving cavity and the communicating cavity, and the communicating cavity is communicated with the pressure relief hole on the upper cover of the A valve; the air intake and the air release hole are provided on one side of the receiving cavity opposite to the pressure relief hole, and the pump diaphragm and the push rod are sequentially provided between the air release hole and the pressure relief hole; the pump diaphragm abuts against the head of the push rod; the push rod extends out of the pressure relief hole, and a sealing plug is provided at the end, and the sealing plug is used to open or close the pressure relief hole; the resilient silicone sealing piece is connected to the push rod and is used to return the push rod to its position and seal it.

[0018] The pressure relief valve further includes a return spring, and the return spring is sleeved on the push rod; a pressure relief water outlet is further provided on the receiving cavity, so that water flows out from the pressure relief water outlet after passing through the pressure relief hole.

[0019] The water stop opening and closing assembly includes a valve body, a valve upper cover, and a water stop pad. An inlet cavity is provided in the center of the valve body, an outlet cavity is formed on the outer periphery of the inlet cavity, and the inlet cavity and the outlet cavity are communicated through an open upper port. The water stop pad is located between the valve upper cover and the valve body and is used to open and close the communication between the inlet cavity and the outlet cavity. A pressure relief cavity is formed between the water stop pad and the valve upper cover, and a pressure relief hole is provided on the valve upper cover; the valve upper cover is provided with a fixing groove for installing the water stop pad, and a diversion groove is provided on the valve upper cover.

[0020] On the valve upper cover of the A water stop and opening / closing assembly, there is an upward extension with an installation cavity for installing a pressure relief valve, and the upper cover pressure relief hole of the A water stop and opening / closing assembly communicates the installation cavity with the pressure relief cavity.

[0021] On the lifting rod, there is a back pressure pad for opening and closing the upper cover pressure relief holes of valves B and C or the air release holes on the A pressure relief valve.

[0022] At the water outlet of the B body, there is an opening, and an anti-siphon assembly is installed at the opening. The anti-siphon assembly includes a T-shaped gasket and an anti-siphon upper cover. The T-shaped gasket is placed on the opening, and the anti-siphon upper cover is covered on the T-shaped gasket, and a ventilation hole is opened on the anti-siphon upper cover.

[0023] Compared with the prior art, the beneficial effects achieved by the technical solution of the present invention are:

[0024] The present invention is designed with a drain valve and a second water tank. The water in the first water tank is discharged to the second water tank through the drain valve. Since the drainage time of the drain valve is the same, the water surface in the first water tank drops by the same height, both lower than the height of the ABC water stop cup. Therefore, the descent time of the floating cylinder has no direct relation with the water pressure, thus ensuring the stable water outlet time of each valve and being not affected by the water pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall structural schematic diagram of the present invention;

[0026] Figure 2 is one of the sectional structural schematic diagrams of the present invention;

[0027] Figure 3 is the second sectional structural schematic diagram of the present invention;

[0028] Figure 4 is the exploded structural schematic diagram of the drain valve;

[0029] Figure 5 is the overall structural schematic diagram of the drain valve;

[0030] Figure 6 is the sectional structural schematic diagram of the drain valve;

[0031] Figure 7 is the matching structural schematic diagram of the floating cylinder and the inner core tube of the drain valve.

[0032] Reference numerals: air pressure button 1, one-way valve 2, air vent hole 3, pump diaphragm 4, push rod 5, resilient silicone sealing piece 6, sealing ring 7, pressure relief hole 8, pressure relief valve body 9, valve upper cover 10, water stop pad 11, body water outlet 12, water inlet body 13, A water tank 27, B water tank 33, body water inlet 14, bolt 15, lifting rod 16, screw rod 17, floating cylinder 18, water stop cup 19, C valve water replenishing outlet 20, back pressure pad 21, diversion groove 22, upper cover pressure relief hole 23, pressure relief water outlet 24, air pressure pipe 25, B water stop cup water replenishing inlet 26, B water stop cup adjustable drain outlet 28, C water stop cup adjustable drain outlet 29, C valve negative pressure port 30, adjusting card 31, air inlet 32, return spring 34, anti-siphon upper cover 35, T-shaped gasket 36, drain valve base 37, drain valve body 38, drain valve floating cylinder 39, inner core pipe 40, connecting cover 41, fixing sleeve 41-1, drain valve sealing piece 42, tower-shaped airbag 43, airbag base 44, airbag guide sleeve 45, guide sleeve bracket 46, sliding piece 47, nut 48, positioning seat 49, floating cylinder drain hole 49-1. Detailed implementation mode

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments.

[0034] As Figures 1 to 3 shown, the toilet flushing device of this embodiment includes an A water tank 27, a B water tank 33 and a drain valve; the A water tank 27 is arranged in the B water tank 33, and the drain valve is installed at the bottom of the A water tank 27; an inlet body 13 is fixed in the A water tank 27 and stores the water flowing out from the C valve water replenishing outlet 20; the B water tank 33 is used to store the water discharged from the A water tank 27.

[0035] The inlet body 13 is provided with a body water inlet 14 connecting to a water source, an A water inlet cavity, a B water inlet cavity and a C water inlet cavity communicating with the body water inlet 14, A valves, B valves and C valves respectively corresponding to the three water inlet cavities, and A body water outlets 12, B body water outlets 12 and C body water outlets 12 respectively controlled by the three valves; the A body water outlet is connected to the toilet upper end toilet wall washing joint, the B body water outlet is connected to the lower end flushing S-bend joint, and the C body water outlet is connected to the water seal bend water replenishing joint.

[0036] Each of the three valves is provided with a water stop opening and closing assembly and a connecting rod opening and closing device. Among them, the A water stop opening and closing assembly is connected to the connecting rod opening and closing device through a pressure relief valve, and the B and C water stop opening and closing assemblies are directly connected to the connecting rod opening and closing device.

[0037] The three groups of connecting rod opening and closing devices in this embodiment all include a buoy 18, a water stop cup 19, a screw rod 17, and a lifting rod 16. One end of the A lifting rod is connected to the air vent 3 of the pressure relief valve, and one end of the B and C lifting rods is connected to the water stop opening and closing assembly. The other ends of the A, B, and C lifting rods are all connected to one end of the screw rod 17, and the other end of the screw rod 17 is screwed to the buoy 18, and the buoy 18 is arranged in the water stop cup 19. Specifically, the lifting rod 16 and the screw rod 17 are connected by an adjusting card 31 to prevent the screw rod 17 from rotating on its own. There is a pin seat at the upper end of the valve upper cover 10, and the lifting rod 16 and the valve upper cover 10 are connected by a pin 15. The pin 15 is used to fix the lifting rod 16 and serve as the fulcrum of the lifting rod 16. There is a back pressure pad 21 on the lifting rod 16, which is used to open and close the upper cover pressure relief holes 23 of the B and C valves or the air vent 3 on the A pressure relief valve.

[0038] Specifically, in this embodiment, the screw rod 17 is an adjustable screw rod. By adjusting the screw rod 17, the height of the buoy 18 is adjusted, so as to adjust the water outlet time of the A valve, B valve, and C valve. The buoy 18 uses the buoyancy of the water in the water stop cup 19 to open and close the upper cover pressure relief holes 23 of the B and C valves under the linkage of the screw rod 17 and the lifting rod 16, and to open or close the air vent 3 of the A pressure relief valve.

[0039] More specifically, in this embodiment, both ends of the adjusting card 31 are connected to the lifting rod 16, and the middle part is buckled to the adjustable screw rod 17. There are convex points on the adjusting card 31, which coincide with the grooves on the adjustable screw rod 17, making it difficult for the adjustable screw rod 17 to rotate.

[0040] In this embodiment, the A and B water stop cups are connected in communication, and the B water stop cup is provided with a B water stop cup water replenishing inlet 26 and a B water stop cup adjustable drain outlet 28; the C water stop cup is provided with a C water stop cup adjustable drain outlet 29, and the C body water outlet is provided with a C valve water replenishing outlet 20. The B water stop cup water replenishing inlet 26 is connected to the C valve water replenishing outlet 20, and the position of the mouth of the B water stop cup is lower than the position of the mouth of the C water stop cup; the front end of the C body water outlet 12 is arranged as a Venturi tube, and the Venturi tube is provided with a C valve negative pressure port 30, and the C valve negative pressure port 30 is connected to the bottom of the B water tank 33. The purpose is that when the C valve is opened, a negative pressure is generated at the C valve negative pressure port 30, causing the water surface of the B water tank 33 to drop. The position of the B water stop cup water replenishing inlet 26 is higher than the highest water level position of the B water stop cup; the C water stop cup adjustable drain outlet 29 is smaller than the B water stop cup adjustable drain outlet 28; the B water stop cup adjustable drain outlet 28 is smaller than the C valve water replenishing outlet 20.

[0041] Specifically, the Venturi tube is provided with a contraction section, a straight tube section, and an expansion section arranged in sequence from front to back. It gradually contracts from A to B, the throat from B to C is a short straight tube section, the C valve negative pressure port 30 is arranged at the straight tube section of the throat from B to C, and it gradually expands from C to D.

[0042] The pressure relief valve is provided with an air inlet 32, and is connected to the pressure button 1 through a check valve 2 and a pneumatic tube 25. The check valve 2 can prevent air pressure from flowing back. The pressure relief valve includes a pressure relief valve body 9, a pump diaphragm 4, a push rod 5, a resilient silicone sealing sheet 6, and a return spring 34. The pressure relief valve body 9 is provided with a receiving cavity and a communication cavity, and a pressure relief hole 8 is provided between the receiving cavity and the communication cavity. The communication cavity is communicated with the upper cover pressure relief hole 23 of the A valve. The side wall of the receiving cavity opposite to the pressure relief hole 8 is provided with the air inlet 32 and an air release hole 3. The pump diaphragm 4 and the push rod 5 are sequentially arranged between the air release hole 3 and the pressure relief hole 8. The pump diaphragm 4 abuts against the head of the push rod 5, and the pump diaphragm 4 pushes the push rod 5 forward under the action of air pressure. The push rod 5 extends out of the pressure relief hole 8, and a sealing plug is provided at the end. A sealing ring 7 is provided on the sealing plug for opening or closing the pressure relief hole 8. The resilient silicone sealing sheet 6 is connected to the push rod 5, and the return spring 34 is sleeved on the push rod 5. The push rod 5 is returned to its position and sealed through the resilient silicone sealing sheet 6 and the return spring 34 to prevent the water flowing out of the pressure relief from reaching the pump diaphragm 4. A pressure relief water outlet 24 is further provided on the receiving cavity, so that the water flows out of the pressure relief water outlet 24 after passing through the pressure relief hole 8.

[0043] The water stop opening and closing assembly includes a valve body, a valve upper cover 10, and a water stop pad 11. A water inlet cavity is provided in the center of the valve body, and a water outlet cavity is formed on the outer periphery of the water inlet cavity. The water inlet cavity and the water outlet cavity are communicated through an open upper port. The water stop pad 11 is located between the valve upper cover 10 and the valve body and is used for opening and closing the communication between the water inlet cavity and the water outlet cavity. A pressure relief cavity is formed between the water stop pad 11 and the valve upper cover 10, and the valve upper cover 10 is provided with an upper cover pressure relief hole 23. The valve upper cover 10 is provided with a fixing groove for installing the water stop pad 11, and the valve upper cover 10 is provided with a diversion groove 22 to communicate the upper section and the lower section of the valve upper cover 10. Specifically, through the diversion groove 22 at the front section of the valve upper cover 10 and the upper cover pressure relief hole 23 at the rear section of the valve upper cover 10, the water stop pad 11 is opened and closed.

[0044] The valve upper cover 10 of the A water stop opening and closing assembly extends upward to be provided with an installation cavity for installing the pressure relief valve. The upper cover pressure relief hole 23 of the A water stop opening and closing assembly communicates the installation cavity with the pressure relief cavity.

[0045] An opening is provided at the B body water outlet, and an anti-siphon assembly is installed at the opening. The anti-siphon assembly includes a T-shaped gasket 36 and an anti-siphon upper cover 35. The T-shaped gasket 36 is erected on the opening, and the anti-siphon upper cover 35 is covered on the T-shaped gasket 36, and a ventilation hole is provided on the anti-siphon upper cover 35.

[0046] As Figures 4 to 7As shown in the figure, the drain valve includes a drain valve base 37, a drain valve body 38, a pneumatic drive assembly, a drain valve float 39, a connection cover 41, and a fixing sleeve 41-1. The drain valve body 38 is fixed on the drain valve base 37, and the drain valve base 37 is installed at the drain hole of the A water tank 27 through a nut 48. The drain valve base 37 is a hollow structure; a central inner tube 40 is provided in the drain valve body 38. A drain valve sealing piece 42 for opening and closing the drain hole is provided at the bottom of the inner tube 40. When the drain valve is closed, the water in the A water tank 27 does not flow into the B water tank 33.

[0047] The pneumatic drive assembly abuts against the top end of the inner tube 40 and is used to drive the inner tube 40 to move up and down. The pneumatic drive assembly is provided with an air inlet, and this air inlet and the air inlet provided by the pressure relief valve are connected to the same pressure button 1, and the pressure button 1 is used to generate air pressure.

[0048] Specifically, the drain valve float 39 is arranged in the inner cavity of the drain valve body 38, and a float drain hole 49-1 is provided at the bottom of this inner cavity. The float drain hole 49-1 can delay the descending speed of the drain valve float 39, so that when the drain valve is opened, the water surface height of the A water tank 27 is lower than the adjustable drain openings of the B water stop cup 28 and the C water stop cup 29, thereby ensuring that the water in the B water stop cup 1 and the C water stop cup can be smoothly discharged into the A water tank 27.

[0049] Both sides of the drain valve float 39 are rotatably connected to the inner cavity of the drain valve body 38, and the drain valve float 39 and the inner tube 40 can be in contact during the up and down movement through hooks provided on the side. When the water surface in the A water tank 27 rises, the drain valve float 39 floats upward under the action of buoyancy. When the inner tube 40 is lifted upward, the hook provided on the inner tube 40 will hang on the drain valve float 39. On the contrary, when the water surface in the A water tank 27 drops, the drain valve float 39 descends and disengages from the hook on the inner tube 40, and the inner tube 40 falls freely and lands on the drain valve base 37. Specifically, a guide groove for the up and down movement of the inner tube 40 is provided in the middle of the drain valve body 38.

[0050] The pneumatic drive assembly includes a slide vane 47, an airbag guide sleeve 45, a tower-shaped airbag 43, an airbag base 44, and a guide sleeve bracket 46; the slide vane 47 is provided at the top of the airbag guide sleeve 45, the bottom of the tower-shaped airbag 43 is fixed to the airbag base 44, an air inlet is provided on the airbag base 44 and is connected to a pneumatic button 1 through a pneumatic tube; the head of the tower-shaped airbag 43 is fixed to the top of the airbag guide sleeve 45; the airbag base 44 is fixed within the guide sleeve bracket 46, specifically, a round hole for installing the airbag base 44 is provided at the bottom of the airbag base 44; the airbag guide sleeve 45 is slidably provided outside the guide sleeve bracket 46; wherein, when the tower-shaped airbag 43 is inflated, the tower-shaped airbag 43 moves upward, causing the airbag guide sleeve 45 to move upward, thereby causing the slide vane 47 to lift the inner core tube 40 upward.

[0051] The drain valve sealing piece 42 is clamped between the connection cover 41 and the fixed sleeve 41-1; the head of the connection cover 41 is connected to the inner core tube 40; a convex groove is provided on the side of the inner core tube 40 to cooperate with a groove provided on the drain valve body 38 as a guide.

[0052] A positioning seat 49 is provided inside the drain valve body 38, shaft holes are provided on both sides of the positioning seat 49, and rotating shafts inserted into the shaft holes are provided on both sides of the drain valve float 39, so that the drain valve float 39 swings within the drain valve body 38; a bracket for installing the pneumatic drive assembly is provided on the side of the drain valve base 37, specifically, the outer wall of the guide sleeve bracket 46 is fixed to the bracket on the outside of the drain valve body 38; a convex groove is provided on the outer wall of the airbag guide sleeve 45 to cooperate with the concave of the guide sleeve bracket 46 as a guide for vertical movement.

[0053] The working principle of the present invention is as follows:

[0054] 1. Open the valve of the main body water inlet 14. At this time, valves B and C are in the open state, and water flows out from both the B main body water outlet and the C main body water outlet. Since a C valve water replenishing outlet 20 is provided on the water outlet pipe of valve C and is connected to the B water stop cup water replenishing inlet 26, and the A water stop cup is connected to the B water stop cup, the A float and the B float rise simultaneously until valve B closes and the delay air vent hole 3 on valve A closes. Since the highest position of the mouth of the C water stop cup is higher than the highest position of the mouth of the B water stop cup, when the A water stop cup and the B water stop cup are full, valve C continues to replenish water, and the excess water flows into the A water tank 27. At this time, the water level in the water tank rises until it is higher than the highest position of the mouth of the C water stop cup 19, and the water in the water tank flows into the C water stop cup 19, closing valve C, and at the same time, the drain valve float 39 floats up.

[0055] Second, press the air pressure button 1. The air pressure passes through the air pressure pipe 25, through the one-way valve 2, and through the air inlet 32. Since the air release hole 3 is closed, the pump diaphragm 4 pushes the push rod 5 to move forward under the action of the air pressure. The sealing ring 7 opens, and the water on the upper section of the upper cover 10 of the A valve passes through the pressure relief water outlet 24 and is discharged from the pressure relief water outlet 24. Due to the pressure relief through the upper cover pressure relief hole 23 on the upper cover 10 of the A valve, at this time, the pressure in the lower section of the A valve is greater than that in the upper section. The water stop pad 11 opens under the action of the water pressure, and the A valve opens, and water flows out from the A body water outlet. At the same time, the air pressure passes through the air pressure pipe and inflates the tower-shaped airbag 43 through the air inlet of the airbag base 44. The tower-shaped airbag 43 moves towards the head direction. Since the head of the tower-shaped airbag 43 is fixed to the head of the airbag guide sleeve 45, and the slide plate 47 is also fixed to the head of the airbag guide sleeve 45, at this time, the inner tube 40 of the drain valve is lifted upward under the action of the slide plate 47, and the drain valve sealing piece 42 opens. Since the drain float 39 is floating at this time, the inner tube 40 will get stuck on the drain float 39 until the water in the inner cavity of the drain valve body 38 slowly flows out from the float drain hole 49-1, the drain valve float 39 descends, and the hook between the drain valve float 39 and the inner tube 40 separates. The inner tube 40 falls freely and lands on the water sealing surface of the drain valve base 37, and the drain valve sealing piece 42 fits with the water sealing surface of the drain valve base 37, and the drain valve stops draining.

[0056] At this time, the water surface of the A water tank 27 is lower than the adjustable drain outlets of the B and C water stop cups. Therefore, the water surfaces of the A water stop cup, B water stop cup, and C water stop cup drop simultaneously, and the adjustable drain outlet 28 of the B water stop cup is larger than the adjustable drain outlet 29 of the C water stop cup.

[0057] The B water stop cup is connected to the A water stop cup again. Therefore, the A float and the B float drop simultaneously. Since the float 18, adjustable screw 17, adjustment card 31, and lift rod 16 are connected, the back pressure pad 21 of the lift rod opens, the air release hole 3 of the A pressure relief valve releases air, and the push rod 5 and the pump diaphragm 4 return to their positions under the action of the rebound silicone sealing piece 6 and the return spring 34. The sealing ring 7 closes, the pressure relief water outlet 24 stops discharging water, and the upper cover pressure relief hole 23 stops relieving pressure.

[0058] Since the upper cover 10 of the valve is provided with a diversion groove 22 and the upper and lower sections of the upper cover are connected, at this time, the pressure in the upper section of the upper cover is greater than that in the lower section, the water stop pad 11 closes, the A valve stops discharging water, and the A water outlet stops discharging water.

[0059] At the same time, when the B float drops to a certain extent, the upper cover pressure relief hole 23 of the B valve releases pressure. At this time, the pressure in the lower section of the B valve is greater than that in the upper section. The water stop pad 11 opens under the action of the water pressure, the B valve opens, and water flows out from the B body water outlet 12. The T-shaped gasket 36 moves upward under the action of the water pressure and fits tightly with the anti-siphon upper cover 35.

[0060] When the float of the C water stop cup drops to a certain extent, the pressure relief hole 23 on the upper cover of the C valve relieves pressure. At this time, the pressure at the lower section of the C valve is greater than that at the upper section. Under the action of water pressure, the water stop pad 11 causes the C valve to open, and water flows out from the water outlet of the C body. Since the front water outlet pipe of the C body water outlet is set as a Venturi tube, it gradually contracts from section A to B, the section from B to C is a short straight pipe as the throat, which is the position of the valve negative pressure port, and the section from C to D is a gradually expanding pipe. Therefore, when water flows out from the C body water outlet, a negative pressure is generated at the valve negative pressure port. Since the C valve negative pressure port 30 is connected to the bottom of the B water tank 33, the water in the B water tank 33 is discharged from the C body water outlet under the action of the negative pressure, and the water surface of the B water tank 33 begins to drop.

[0061] Since there is a C valve water replenishing water outlet 20 at the rear end of the C valve water outlet pipe, when water flows out from the C body water outlet, a part of the water flows into the B water stop cup through the C valve water replenishing water outlet 20 and the B water stop cup water replenishing water inlet 26. Since the B water stop cup is connected to the A water stop cup, at this time, the A float and the B float rise simultaneously, closing the air vent hole 3 on the A valve pressure relief valve. At the same time, the B valve pressure relief hole is closed for the same principle as the A valve, and the B valve closes, and the water outlet of the B body stops discharging water. At this time, the T-shaped gasket 36 returns to its original position under the action of gravity. At this time, air enters the water outlet of the B valve body through the lower part of the T-shaped gasket 36 from the hole in the anti-siphon upper cover 35 to prevent the siphon phenomenon.

[0062] Since the mouth of the B water stop cup is lower than that of the C water stop cup, after the A valve and the B valve are closed, the C valve continues to replenish water to the B water stop cup. At this time, the excess water at the upper end of the B water stop cup continuously flows into the A water tank 27 from the mouths of the A water stop cup and the B water stop cup. At this time, the water surface in the A water tank 27 begins to rise until the water surface is higher than the mouth of the C water stop cup, and the water in the A water tank 27 flows into the C water stop cup, the C valve closes, and at the same time, the water surface of the B water tank 33 stops dropping.

Claims

1. Toilet flushing device, characterized in that: It includes a first water tank, a second water tank and a drain valve; the first water tank is arranged inside the second water tank, and the drain valve is installed at the bottom of the first water tank; an inlet body is arranged inside the first water tank, and the inlet body is provided with a body inlet, an A inlet cavity, a B inlet cavity and a C inlet cavity communicated with the body inlet, an A valve, a B valve and a C valve respectively corresponding to the three inlet cavities, and an A body outlet, a B body outlet and a C body outlet respectively controlled by the three valves; the A body outlet is connected to the toilet wall washing joint at the upper end of the toilet, the B body outlet is connected to the lower end S-bend flushing joint, and the C body outlet is connected to the water seal replenishment joint; The three valves are all provided with a water stop opening and closing component and a connecting rod opening and closing device. Among them, the A water stop opening and closing component is connected to the connecting rod opening and closing device through a pressure relief valve, and the B and C water stop opening and closing components are directly connected to the connecting rod opening and closing device. Each group of connecting rod opening and closing devices includes a floating cylinder, a water stop cup, a screw rod and a lifting rod. Among them, one end of the A lifting rod is connected to the air vent of the pressure relief valve, one end of the B and C lifting rods is connected to the water stop opening and closing component, the other ends of the A, B and C lifting rods are all connected to one end of the screw rod, and the other end of the screw rod is connected to the floating cylinder. The floating cylinder is arranged inside the water stop cup; Among them, the A and B water stop cups are communicated with each other, and the B water stop cup is provided with a B water stop cup replenishment water inlet and a B water stop cup adjustable drain outlet; the C water stop cup is provided with a C water stop cup adjustable drain outlet, and the C body outlet is provided with a C valve replenishment water outlet. The B water stop cup replenishment water inlet is connected to the C valve replenishment water outlet, and the position of the B water stop cup mouth is lower than the position of the C water stop cup mouth; the front end of the C body outlet is arranged as a Venturi tube, and the Venturi tube is provided with a C valve negative pressure port, and the C valve negative pressure port is connected to the bottom of the second water tank; The drain valve includes a drain valve base, a drain valve body, a pneumatic drive component and a drain valve floating cylinder; the drain valve body is fixed on the drain valve base, the drain valve base is installed at the drain hole of the first water tank, and the drain valve base is a hollow structure; a core tube is arranged in the center of the drain valve body, and a drain valve sealing piece for opening and closing the drain hole is arranged at the bottom of the core tube; the pneumatic drive component abuts against the top end of the core tube and is used to drive the core tube to move up and down. The pneumatic drive component is provided with an air inlet, and this air inlet and the air inlet set by the pressure relief valve are connected to the same air pressure button; the drain valve floating cylinder is arranged in the inner cavity of the drain valve body, and a floating cylinder drain hole is arranged at the bottom of this inner cavity; both sides of the drain valve floating cylinder are rotatably connected to the inner cavity of the drain valve body, and the drain valve floating cylinder and the core tube can be in contact during the up and down movement through a hook arranged on the side; The pressure relief valve is provided with an air inlet and is connected to the pneumatic button through a one-way valve; the pressure relief valve further includes a pressure relief valve body, a pump diaphragm, a push rod, and a resilient silicone sealing sheet; the pressure relief valve body is provided with a receiving cavity and a communicating cavity, and a pressure relief hole is provided between the receiving cavity and the communicating cavity, and the communicating cavity is communicated with the pressure relief hole on the upper cover of the A valve; an air inlet and a vent hole are provided on one side of the receiving cavity opposite to the pressure relief hole, and the pump diaphragm and the push rod are sequentially arranged between the vent hole and the pressure relief hole; the pump diaphragm abuts against the head of the push rod; the push rod extends out of the pressure relief hole, and a sealing plug is provided at the end, and the sealing plug is used to open or close the pressure relief hole; the resilient silicone sealing sheet is connected to the push rod and is used to return the push rod to its position and seal it. The pressure relief valve further includes a return spring, and the return spring is sleeved on the push rod; a pressure relief water outlet is further provided on the receiving cavity, so that water flows out from the pressure relief water outlet after passing through the pressure relief hole.

2. The toilet flushing device according to claim 1, characterized in that: The pneumatic drive assembly includes a slide plate, an airbag guide sleeve, a tower-shaped airbag, an airbag base, and a guide sleeve bracket; the slide plate is arranged on the top of the airbag guide sleeve, the bottom of the tower-shaped airbag is fixed on the airbag base, and the air inlet is provided on the airbag base; the head of the tower-shaped airbag is fixed on the top of the airbag guide sleeve; the airbag base is fixed in the guide sleeve bracket; the airbag guide sleeve is slidably arranged outside the guide sleeve bracket; wherein, when the airbag guide sleeve moves upward, the slide plate lifts the inner core tube upward.

3. The toilet flushing device according to claim 1, characterized in that: The drain valve further includes a connection cover and a fixing sleeve; the drain valve sealing sheet is clamped between the connection cover and the fixing sleeve; the head of the connection cover is connected to the inner core tube; a convex groove is provided on the side of the inner core tube to cooperate with the groove provided on the drain valve body as a guide.

4. The toilet flushing device according to claim 1, wherein: A positioning seat is provided inside the drain valve body, shaft holes are provided on both sides of the positioning seat, and rotating shafts inserted into the shaft holes are provided on both sides of the drain valve float, so that the drain valve float swings inside the drain valve body; a bracket for installing the pneumatic drive assembly is provided on the side of the drain valve base.

5. The toilet flushing device according to claim 1, wherein: The position of the water replenishing inlet of the B water stop cup is higher than the highest water level position of the B water stop cup; the adjustable drain outlet of the C water stop cup is smaller than the adjustable drain outlet of the B water stop cup; the adjustable drain outlet of the B water stop cup is smaller than the water replenishing outlet of the C valve.

6. The toilet flushing device according to claim 1, characterized in that: The venturi tube is provided with a contraction section, a straight tube section, and an expansion section arranged in sequence from front to back, and the negative pressure port of the C valve is arranged at the straight tube section.

7. The toilet flushing device according to claim 1, characterized in that: The water stop opening and closing assembly includes a valve body, a valve upper cover, and a water stop pad. An inlet cavity is provided in the center of the valve body, an outlet cavity is formed on the outer periphery of the inlet cavity, and the inlet cavity and the outlet cavity are communicated through an open upper port. The water stop pad is located between the valve upper cover and the valve body and is used to open and close the communication between the inlet cavity and the outlet cavity. A pressure relief cavity is formed between the water stop pad and the valve upper cover, and a pressure relief hole is provided on the valve upper cover; a fixing groove for installing the water stop pad is provided on the valve upper cover, and a diversion groove is provided on the valve upper cover.

8. The toilet flushing device according to claim 7, wherein: The valve upper cover of the A water stop opening and closing assembly extends upward to be provided with an installation cavity for installing the pressure relief valve, and the pressure relief hole on the upper cover of the A water stop opening and closing assembly communicates the installation cavity with the pressure relief cavity.

9. The toilet flushing device according to claim 1, characterized in that: A back pressure pad is provided on the lifting rod, which is used to open and close the pressure relief holes in the upper covers of valves B and C or the pressure relief holes in pressure relief valve A.

10. The toilet flushing device according to claim 1, wherein: An opening is provided at the water outlet of the B body, and an anti-siphon assembly is installed at the opening. The anti-siphon assembly includes a T-shaped gasket and an anti-siphon upper cover. The T-shaped gasket is placed on the opening, and the anti-siphon upper cover is covered on the T-shaped gasket, and a ventilation hole is provided on the anti-siphon upper cover.

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