A low pressure startable flush valve

Abstract

The application provides a low-pressure starting flush valve, which comprises a water valve body, an inlet and at least one outlet, a pilot valve for controlling the water path, a delay valve, a delay valve cavity communicating with the inlet, a pressure relief assembly arranged above the delay valve cavity, a sliding piston assembly arranged in the delay valve cavity and separating the delay valve cavity into an inner cavity and an outer cavity, and a water channel of the sliding piston assembly; the one-way starting mechanism is configured to act on the pilot valve when the sliding piston assembly moves in one direction, open the pressure relief assembly to make water flow into the outer cavity and push the sliding piston assembly to move to the other side of the delay valve cavity, and the pilot valve is in a closed state; the one-way starting mechanism does not act on the pilot valve, the water in the outer cavity flows into the inner cavity to reset the sliding piston assembly when the pressure relief assembly is closed, and the one-way starting mechanism opens the pilot valve. The application can be started under low pressure, does not need to increase the piston diameter to achieve large force driving, and can save the space for using the flush valve.

Description

Technical Field

[0001] This invention relates to a flush valve that can be started under low pressure. Background Technology

[0002] A flush valve, also known as a flushing valve, is a key actuator in sanitary ware (such as toilets and urinals) used to control water flow and achieve the flushing function. Its core function is to release a fixed amount of water within a specific time after receiving a trigger signal to complete the flushing and then automatically shut off.

[0003] Existing technologies, such as the tankless mechanical valve flushing system with patent number CN114411898B, use a delay setting in the activation chamber to allow a single trigger to control the main control piston to complete a reciprocating motion. During this process, the main control piston controls the water circuit switching mechanism to switch the water outlet pipe, thereby driving the water flow to complete the entire process of outer ring flushing, jet flushing, and outer ring secondary flushing and water storage. The entire process is completed by mechanical force and does not rely on the electricity of the water tank. However, this mechanism has the following drawbacks: the product is difficult to start under low pressure, and it is necessary to increase the diameter of the delay valve piston to achieve a strong drive, resulting in a large size and space occupation.

[0004] Therefore, in order to address the above problems, the present invention proposes a flushing valve that can be started under low pressure. Summary of the Invention

[0005] This invention provides a flush valve that can be started under low pressure, which can effectively solve the above problems.

[0006] This invention is implemented as follows:

[0007] A flushing valve capable of low-pressure start includes a valve body having an inlet and at least one outlet, and a pilot valve disposed between the inlet and the outlet for controlling the on / off of the water circuit, and further includes;

[0008] The delay valve has a delay valve chamber that communicates with the inlet. A pressure relief component is provided above the delay valve chamber. A sliding piston assembly is provided inside the delay valve chamber to divide the delay valve chamber into an inner chamber and an outer chamber. The sliding piston assembly has a water passage groove that communicates the inner chamber and the outer chamber.

[0009] The one-way starting mechanism linked to the sliding piston assembly is constructed such that when the sliding piston assembly moves in only one direction, it acts on the pilot valve, opening the pressure relief assembly to allow water to flow into the outer cavity and push the sliding piston assembly to move to the other side of the delay valve cavity. When the pilot valve is closed, the one-way starting mechanism does not act on the pilot valve. When the pressure relief assembly is closed, the water in the outer cavity flows into the inner cavity through the water channel, causing the sliding piston assembly to reset. The one-way starting mechanism then opens the pilot valve.

[0010] As a further improvement, the water valve body has multiple outlets, and a switching valve disposed among the multiple outlets for switching the water flow path is located within the water valve body; and

[0011] The water circuit switching mechanism includes a rocker assembly for controlling the switching valve to switch the water outlet circuit and a control plate assembly. The control plate assembly includes a slide plate that moves synchronously with the piston and a control plate that is detachably installed in the slide plate. The control plate is provided with a control groove, which is configured to accommodate the rocker assembly to slide inside during the piston movement, thereby switching the water outlet circuit and controlling the water outlet duration.

[0012] As a further improvement, it has multiple delay valves, and the water passage grooves of the sliding piston assemblies in the multiple delay valves are of different sizes;

[0013] The delay valve switching component is configured to switch the single delay valve to control the one-way starting mechanism to open the pilot valve when a single delay valve is started.

[0014] As a further improvement, the sliding piston assembly includes a delay rod connected to the pressure relief assembly and a piston slidably disposed in the delay valve chamber. A water passage groove is provided on the side wall of the delay rod. A first spring is pressed against the top of the piston, and the other end of the first spring presses against the pressure relief assembly. A piston rod is installed at the bottom of the piston. A piston hole is provided along the axial direction of the piston and the piston rod. The delay rod is axially aligned and inserted into the piston hole. A water passage hole is provided on the side wall of the piston rod. A water inlet hole is provided on the water valve body, connecting the inlet and the outer cavity. When the pressure relief assembly is opened, the water flow from the inlet enters the outer cavity through the water inlet hole. The piston moves upward and compresses the first spring. When the pressure relief assembly is closed, the water flow in the outer cavity enters the inner cavity sequentially through the water passage hole and the water passage groove. The first spring resets and pushes the piston downward.

[0015] As a further improvement, the pressure relief assembly includes a pressure relief rod seat disposed at the top of the delay valve chamber, a pressure relief hole disposed above the pressure relief rod seat, a slidable pressure relief activation rod installed in the pressure relief hole, a pressure relief switch pressed against the pressure relief activation rod, a first sealing part disposed on the pressure relief activation rod, the first sealing part sealing the pressure relief hole, a second spring pressed against the first sealing part below, the other end of the second spring pressing against the delay rod, pressing the pressure relief switch, the pressure relief activation rod descending and compressing the second spring, the first sealing part separating from the pressure relief hole and thus opening the pressure relief assembly, releasing the pressure relief switch, the second spring resetting and pushing the pressure relief activation rod upward, the first sealing part sealing the pressure relief hole and thus closing the pressure relief assembly.

[0016] As a further improvement, the water valve body has an inlet chamber and an opening / closing chamber. The pilot valve includes an elastic diaphragm disposed above the opening / closing chamber, which separates the inlet chamber and the opening / closing chamber. A pilot valve plate is disposed above the elastic diaphragm, and a first through hole is provided on the bottom wall of the pilot valve plate. A pressure relief chamber is disposed above the pilot valve plate, and the inlet chamber is connected to the pressure relief chamber through the first through hole. A pilot valve actuation assembly is disposed on the side wall of the pressure relief chamber. The pilot valve actuation assembly includes a control rod fixing seat, a second through hole is provided in the control rod fixing seat, and a slidable pilot valve control rod is disposed in the second through hole. The valve control rod is equipped with a second sealing part, which isolates the pressure relief chamber and the second through hole. The second sealing part presses against a third spring below, and the other end of the third spring presses against the upper side wall of the opening and closing chamber. The upper side wall of the opening and closing chamber is equipped with a third through hole. When the pilot valve control rod is pressed, the second sealing part separates from the second through hole, and the water flows sequentially from the pressure relief chamber, the second through hole, and the third through hole to the opening and closing chamber. The elastic diaphragm rises upward, thereby allowing the water in the inlet chamber to flow to the opening and closing chamber. When the pilot valve control rod is released, the second sealing part seals the second through hole, causing the elastic diaphragm to reset and isolate the inlet chamber and the opening and closing chamber.

[0017] As a further improvement, a fixed slide rail is provided above the main body of the water valve. The one-way starting mechanism includes a push-pull rod connected to the piston rod. The push-pull rod is slidably connected to the fixed slide rail. A lifting rib is provided on the side wall of the push-pull rod. A first inclined surface is provided in front of the lifting rib, and a second inclined surface corresponding to the first inclined surface is provided behind the lifting rib. A pry bar is pivotally connected above the fixed slide rail. A top pressing part is provided at the other end of the pry bar. The top pressing part presses against the pilot valve control rod. Lifting wedges corresponding to the first and second inclined surfaces are provided on both sides of the top pressing part. When the piston rod pushes the push-pull rod to slide upward, the first inclined surface lifts the lifting wedges upward, causing the top pressing part to separate from the pilot valve control rod. When the piston rod pushes the push-pull rod to slide downward, the lifting wedges wedge in from below the second inclined surface, causing the top pressing part to press down on the pilot valve control rod.

[0018] As a further improvement, the water valve body has an inlet pipe, a first outlet pipe and a second outlet pipe connected to the inlet pipe. The inlet pipe has an inlet, the first outlet pipe has a first outlet, and the second outlet pipe has a second outlet. The water valve body has a switching chamber between the first outlet and the second outlet. The switching valve is located in the switching chamber. The rocker assembly includes a turntable connected to the switching valve, a swing plate connected above the turntable, and a rocker arm above the swing plate. Moving the rocker arm causes the turntable to rotate, thereby driving the switching valve to switch the water outlet path.

[0019] As a further improvement, the control slot includes an open slot at the bottom of the control panel, a first water outlet section connected to the open slot, a second water outlet section bent and connected to the first water outlet section, and a third water outlet section bent and connected to the second water outlet section. When the push-pull rod pushes the slide plate upward, the rocker arm slides sequentially from the third water outlet section, the second water outlet section, and the first water outlet section to the open slot. At this time, the pilot valve is closed, and the one-way start mechanism does not act on the pilot valve. When the push-pull rod pushes the slide plate downward, the rocker arm slides from the open slot to the end of the first water outlet section. At this time, the pilot valve is opened, and the water flows from the inlet to the first outlet. The rocker arm slides from the end of the first water outlet section to the end of the second water outlet section, and the water flows from the inlet to the second outlet. The rocker arm slides from the end of the second water outlet section to the end of the third water outlet section, and the water flows from the inlet to the first outlet for water replenishment.

[0020] As a further improvement, the delay valve switching assembly includes a push rod connected to a pressure relief switch. The other end of the push rod is connected to a lever rotatably mounted on a fixed slide rail. The other end of the lever is provided with a toggle part. A pin is slidably mounted above the fixed slide rail between two push-pull rods. The push-pull rod is provided with a pin groove corresponding to the pin. The middle of the pin is provided with a toggle groove corresponding to the toggle part. When the pressure relief switch is pressed, the lever toggle the pin, causing the pin to insert into the pin groove on the push-pull rod corresponding to the delay valve, thereby activating the flush valve.

[0021] The beneficial effects of this invention are as follows: By setting a delay valve connected to the inlet of the water valve body, when the pressure relief assembly is opened, water flows into the outer cavity and pushes the sliding piston assembly to move to the other side of the delay valve cavity. The pilot valve is in the closed state, and the one-way starting mechanism does not act on the pilot valve. Closing the pressure relief assembly allows the water in the outer cavity to enter the inner cavity through the water channel, causing the sliding piston assembly to reset. The one-way starting mechanism then opens the pilot valve, thereby opening the water passage of the water valve body. In this invention, the water pressure in the main pipe first acts on the delay valve, concentrating the water pressure that pushes the piston. Then, by pushing the piston, the one-way starting mechanism is driven to open the pilot valve. Utilizing the principle of the pilot valve, this structural design can be started under low pressure conditions. It does not require increasing the diameter of the delay valve piston to achieve a strong drive, thus saving the space required for flushing valves. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the three-dimensional assembly structure of a flush valve capable of low-pressure start according to the present invention. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the three-dimensional assembly structure of a flush valve capable of low-pressure start according to the present invention. Figure 2 .

[0024] Figure 3 This is an exploded view of the three-dimensional assembly structure of a flushing valve that can be started under low pressure according to the present invention.

[0025] Figure 4 This is a cross-sectional view of the structure of a flush valve that can be started under low pressure according to the present invention. Figure 1 .

[0026] Figure 5 This is a cross-sectional view of the structure of a flush valve that can be started under low pressure according to the present invention. Figure 2 .

[0027] Figure 6 This is a cross-sectional view of the structure of a flush valve that can be started under low pressure according to the present invention. Figure 3 .

[0028] Figure 7 This is a cross-sectional view of the structure of a flush valve that can be started under low pressure according to the present invention. Figure 4 .

[0029] Figure 8 This is a schematic diagram of the push-pull rod and skid plate in a flush valve that can be started under low pressure according to the present invention.

[0030] Figure 9 This is a schematic diagram of the control board in a flush valve that can be started under low pressure according to the present invention.

[0031] Figure 10 This is a schematic diagram of the structure of the present invention, which opens the delay valve and the water pressure pushes the piston upward.

[0032] Figure 11 This is a schematic diagram of the structure of the delayed-opening pilot valve and the lifting wedge block raised by the lifting rib strip of the present invention.

[0033] Figure 12 This is a schematic diagram of the delayed-opening pilot valve and the control lever point of the pilot valve not being pressed by the skid in this invention.

[0034] Figure 13 This is a schematic diagram of the structure of the present invention, which involves closing the delay valve and using water pressure to push the piston downward.

[0035] Figure 14 This is a schematic diagram of the structure of the present invention, which opens the pilot valve and lifts the wedge block by wedging it in through the second inclined surface.

[0036] Figure 15 This is a schematic diagram of the structure of the present invention, which involves opening the pilot valve and pressing the pilot valve control lever with a skid.

[0037] The attached diagram is labeled as follows:

[0038] 10. Water valve body; 11. Water inlet pipe; 111. Water inlet chamber; 112. Opening and closing chamber; 113. Switching chamber; 12. First water outlet pipe; 13. Second water outlet pipe; 14. Fixed slide rail; 15. Plug;

[0039] 16. Anti-siphon block;

[0040] 20. Pilot valve; 21. Elastic diaphragm; 22. Pilot valve plate; 221. First through hole; 23. Pressure relief chamber; 24. Control rod holder; 25. Second through hole; 26. Pilot valve control rod; 261. Second sealing part; 27. Third spring; 28. Third through hole;

[0041] 30. Delay valve; 31. Delay valve chamber; 311. Inner chamber; 312. Outer chamber; 32. Pressure relief assembly; 321. Pressure relief rod seat; 3211. Pressure relief hole; 322. Pressure relief start rod; 3221. First sealing part; 323. Second spring; 33. Delay rod; 331. Water passage groove; 34. Piston; 35. First spring; 36. Piston rod; 361. Water passage hole; 37. Water inlet hole; 38. Pressure relief switch;

[0042] 40. One-way starting mechanism; 41. Push-pull rod; 411. Lifting rib; 412. First inclined surface; 413. Second inclined surface; 414. Pin groove; 42. Skid plate; 421. Top pressing part; 422. Lifting wedge block;

[0043] 50. Switching valve;

[0044] 60. Flow channel switching component; 61. Turntable; 62. Swing plate; 621. Rocker arm; 63. Slide plate; 64. Control board; 641. Control slot; 6411. Opening slot; 6412. First water outlet section; 6413. Second water outlet section; 6414. Third water outlet section; 642. Buckle;

[0045] 70. Delay valve switching assembly; 71. Push rod; 72. Toggle lever; 721. Toggle part; 73. Pin; 731. Toggle groove. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0047] Reference Figures 1-3 As shown, a flushing valve that can be started under low pressure includes a valve body 10 having an inlet and at least one outlet, and a pilot valve 20 disposed between the inlet and the outlet for controlling the flow of water, and also includes;

[0048] The delay valve 30 has a delay valve chamber 31 that communicates with the inlet. A pressure relief component 32 is provided above the delay valve chamber 31. A sliding piston assembly is provided inside the delay valve chamber 31 to divide the delay valve chamber 31 into an inner chamber and an outer chamber. The sliding piston assembly has a water passage groove 331 that communicates the inner chamber 311 and the outer chamber 312.

[0049] The one-way starting mechanism 40, which is linked to the sliding piston assembly, is configured such that when the sliding piston assembly moves in only one direction, it acts on the pilot valve 20, opening the pressure relief assembly 32 to allow water to flow into the outer cavity 312 and push the sliding piston assembly to move to the other side of the delay valve cavity 31. The pilot valve 20 is in the closed state, and the one-way starting mechanism 40 does not act on the pilot valve. Closing the pressure relief assembly 32 allows water in the outer cavity 312 to flow through the water channel 331 into the inner cavity 311, resetting the sliding piston assembly. The one-way starting mechanism 40 then opens the pilot valve 20. In one embodiment, the water valve body 10 has an inlet pipe 11, and a first outlet pipe 12 and a second outlet pipe 13 connected to the inlet pipe 11. A [missing information - likely a device or component] is installed inside the inlet pipe 11. The inlet pipe 11 has a first outlet pipe 12 and a second outlet pipe 13. A plug 15 is provided at the end of the inlet pipe 11. An anti-siphon block 16 is installed at the connection between the first outlet pipe 12, the second outlet pipe 13, and the inlet pipe 11. The inlet pipe 11 is provided with a pilot valve 20 for opening / closing the flow channel of the inlet pipe 11 and a switching valve 50 for switching the flow channel. The switching valve 50 can switch the water flow in the inlet pipe 11 to the first outlet pipe 12 or the second outlet pipe 13. In this embodiment, the first outlet pipe 12 is connected to the flushing assembly in the toilet, and the second outlet pipe 13 is connected to the flushing assembly in the toilet. The second outlet pipe 13 acts as a flushing aid, forming a siphon effect to flush away the excrement.

[0050] By setting a delay valve 30 connected to the inlet of the water valve body 10, when the pressure relief assembly 32 is opened, water flows into the outer cavity 312 and pushes the sliding piston assembly to move to the other side of the delay valve cavity 31. The pilot valve 20 is in the closed state, and the one-way starting mechanism 40 does not act on the pilot valve 20. The pressure relief assembly 32 is closed, allowing the water in the outer cavity 312 to enter the inner cavity 311 through the water channel 331, causing the sliding piston assembly to reset. The one-way starting mechanism 40 then opens the pilot valve 20, thereby opening the water passage of the water valve body 10. In this invention, the water pressure in the main pipeline first acts on the delay valve 30, concentrating the water pressure that pushes the sliding piston assembly. Then, by pushing the sliding piston assembly, the one-way starting mechanism 40 is driven to open the pilot valve 20. The principle of driving a large water pressure with a small water pressure using the pilot valve 20 is utilized. This structural design can be started under low pressure conditions, without needing to increase the diameter of the delay valve piston to achieve a large drive, thus saving the space required for flushing valves.

[0051] The present invention also includes: a water path switching mechanism 60, comprising a rocker assembly for controlling the switching valve 50 to switch the water path and a control plate assembly. The control plate assembly includes a slide plate 63 that moves synchronously with the piston, and a control plate 64 detachably disposed within the slide plate 63. A control groove 641 is provided within the control plate 64. The control groove 641 is configured to accommodate the rocker assembly to slide within it during piston movement, thereby switching the water path and controlling the water flow duration. By providing a detachable control plate 64, control plates 64 of different specifications can be replaced. Similar products on the market do not have adjustable flushing times. The control plate 64 of the present invention can be designed with control grooves 641 of different flushing durations according to customer needs.

[0052] This invention has multiple delay valves 30, and the water passage grooves 331 of the sliding piston assemblies in the multiple delay valves 30 are of different sizes. The delay valve switching component 70 is configured to switch the single delay valve 30 when a single delay valve 30 is activated, thereby controlling the one-way starting mechanism 40 to open the pilot valve 20. By setting water passage grooves 331 of different sizes, the time for water to enter the delay valve chamber 31 is affected, thereby controlling the total flushing time of the flushing valve, triggering the switches on different delay valves 30, and switching the flushing control through the delay valve switching component 70, large discharge and / or small discharge effects can be achieved.

[0053] The structure of each component of this invention will be described below.

[0054] First, the structure of the delay valve 30 and its working principle in this embodiment will be explained in detail: (Refer to...) Figures 4-5 , Figure 10 , Figure 13As shown, the sliding piston assembly includes a delay rod 33 connected to the pressure relief assembly 32 and a piston 34 slidably disposed within the delay valve chamber 31. The pressure relief assembly 32 includes a pressure relief rod seat 321 disposed at the top of the delay valve chamber 31. A pressure relief hole 3211 is disposed above the pressure relief rod seat 321, and a slidable pressure relief activation rod 322 is installed in the pressure relief hole 3211. The pressure relief activation rod 322 presses against the pressure relief switch 38. In this embodiment, an airbag is disposed within the pressure relief switch 38. The function of the airbag is to press the pressure relief switch 38. The pressure relief process is gentler, providing a better user experience. A first sealing part 3221 is provided on the pressure relief start rod 322, which seals the pressure relief hole 3211. The first sealing part 3221 presses against a second spring 323 below, and the other end of the second spring 323 presses against a delay rod 33. The top of the delay rod 33 has a groove, in which the pressure relief start rod 322 slides. A water passage groove 331 is provided on the side wall of the delay rod 33. The piston 34 divides the delay valve chamber 31 into an inner chamber 311 and an outer chamber. The piston 34 has two parts, upper and lower. A piston rod 36 is installed at the bottom of the piston 34. A piston hole is provided along the axial direction of the piston 34 and piston rod 36. The delay rod 33 is axially aligned and inserted into the piston hole. A water passage hole 361 is provided on the side wall of the piston rod 36. A water inlet hole 37 is provided at the bottom of the delay valve chamber 31. The delay valve chamber 31 is connected to the water inlet pipe 11 through the water inlet hole 37. When the user presses the pressure relief switch 38, the pressure relief start rod 322 moves down and compresses the second spring 323. The first sealing part 3221 separates from the pressure relief hole 3211. The pressure relief assembly 32 is then opened, and the pressure in the inner cavity 311 gradually decreases. Water flows into the outer cavity 312 through the water inlet 37. The piston 34 moves upward and compresses the first spring 35. The user releases the pressure relief switch 38, the second spring 323 resets and pushes the pressure relief start rod 322 upward. The first sealing part 3221 seals the pressure relief hole 3211 and closes the pressure relief assembly 32. Water flows in the water inlet pipe 11 sequentially through the water passage hole 361 and the water passage groove 331 into the inner cavity 311. The first spring 35 resets and pushes the piston 34 downward.

[0055] The structure and working principle of the pilot valve 20 in this embodiment are described in detail below: (Refer to...) Figure 6 , Figure 12 , Figure 15As shown, the water inlet pipe 11 includes an inlet chamber 111 and an opening / closing chamber 112. The pilot valve 20 includes an elastic diaphragm 21 disposed above the opening / closing chamber 112. The elastic diaphragm 21 has a certain elastic limit and isolates the inlet chamber 111 and the opening / closing chamber 112 to prevent water from flowing through the water inlet pipe 11. A pilot valve plate 22 is disposed above the elastic diaphragm 21. A first through hole 221 is provided on the bottom wall of the pilot valve plate 22. A pressure relief chamber 23 is disposed above the pilot valve plate 22. The inlet chamber 111 is connected to the pressure relief chamber 23 through the first through hole 221. A pilot valve actuation assembly is provided on the side wall. The pilot valve 20 actuation assembly includes a control rod fixing seat 24, a second through hole 25 is provided in the control rod fixing seat 24, a slidable pilot valve control rod 26 is provided in the second through hole 25, a second sealing part 261 is provided on the pilot valve control rod 26, the second sealing part 261 isolates the pressure relief chamber 23 and the second through hole 25, a third spring 27 is pressed down below the second sealing part 261, and the other end of the third spring 27 presses against the upper side wall of the opening and closing chamber 112, a third through hole 28 is provided on the upper side wall of the opening and closing chamber 112, and the diameters of the second through hole 25 and the third through hole 28 are larger. When the user presses the pilot valve control lever 26, the second sealing part 261 separates from the second through hole 25. Water in the pressure relief chamber 23 flows sequentially from the pressure relief chamber 23, the second through hole 25, and the third through hole 28 to the opening / closing chamber 112. Because the diameters of the second through hole 25 and the third through hole 28 are larger than the diameter of the first through hole 221, the pressure relief chamber 23 cannot be replenished in time. The pressure in the opening / closing chamber 112 is greater than the pressure in the pressure relief chamber 23. Therefore, the elastic diaphragm 21 rises upwards, allowing water in the inlet chamber 111 to flow to the opening / closing chamber 112. Releasing the pilot valve control lever 26 releases the second sealing part 261. The plug 261 seals the second through hole 25. At this time, water continues to be added to the pressure relief chamber 23, and the pressure in the pressure relief chamber 23 is restored, causing the elastic diaphragm 21 to reset and isolate the water inlet chamber 111 and the opening and closing chamber 112. The core function of the pilot valve 20 is to use a very small control force. In this embodiment, this small control force is the pilot valve starting component. By controlling a small pilot fluid, it indirectly and precisely drives a very large and bulky main valve to open or close. In this embodiment, the large main valve is the elastic diaphragm 21. Therefore, this structure can be used for starting under high pressure conditions.

[0056] The structure and working principle of the one-way starting mechanism 40 in this embodiment are described in detail below: (Refer to...) Figure 3 , Figure 6 , Figures 11-12 , Figures 14-15As shown, a fixed slide rail 14 is provided on the water inlet pipe 11. The one-way starting mechanism 40 includes a push-pull rod 41 connected to the piston rod 36. The push-pull rod 41 is slidably connected to the fixed slide rail 14. A lifting rib 411 is provided on the side wall of the push-pull rod 41. A first inclined surface 412 is provided in front of the lifting rib 411, and a second inclined surface 413 corresponding to the first inclined surface 412 is provided behind the lifting rib 411. A pry plate 42 is pivotally connected above the fixed slide rail 14. A pressing part 421 is provided at the other end of the pry plate 42. The pressing part 421 presses against the pilot valve control rod 26. The top pressure part 421 is provided with lifting wedges 422 on both sides, corresponding to the first inclined surface 412 and the second inclined surface 413. When the piston rod 36 pushes the push-pull rod 41 to slide upward, the first inclined surface 412 lifts the lifting wedges 422 upward, so that the top pressure part 421 is separated from the pilot valve control rod 26. When the piston rod 36 pushes the push-pull rod 41 to slide downward, the lifting wedges 422 wedge in from below the second inclined surface 413, so that the top pressure part 421 presses down on the pilot valve control rod 26. The one-way starting mechanism 40 of the present invention is not affected by the flow pressure and will not jam during use.

[0057] The structure and working principle of the flow channel switching component 60 in this embodiment are described in detail below: Refer to Figure 3 , Figure 6 , Figures 11-12 , Figures 14-15As shown, the flow channel switching assembly 60 includes a switching chamber 113 located in front of the inlet pipe 11. The switching chamber 113 is connected to the first outlet pipe 12 and the second outlet pipe 13. A rotatable switching valve 50 is installed inside the switching chamber 113. The switching valve 50 includes an arc-shaped stop, which is used to block the passage from the inlet pipe 11 to the first outlet pipe 12 and the second outlet pipe 13. A fixed rod is installed above the arc-shaped stop. The rocker assembly includes a turntable 61 connected above the switching valve 50. The arc-shaped stop is connected to the center of the turntable through the fixed rod. A protrusion is provided on the side wall of the turntable 61, and a mounting hole is provided inside the protrusion. A swing disk 62 is connected above the turntable 61. The swing disk 62 rotates around one end of the turntable. A mounting rod is provided at the other end of the swing disk 62 and is installed in the mounting hole. A rocker arm 621 is provided above the swing disk 62. By moving the rocker arm 621, the turntable 61 rotates, thereby driving the switching valve 50 to switch the water flow in the inlet pipe 11 to the first outlet pipe 12 and the second outlet pipe 13. The flow channel switching assembly 60 also includes a slide plate 63 that is slidably mounted above the fixed slide rail 14. The slide plate 63 has an installation groove, and a detachable control plate 64 is provided in the installation groove. The control plate 64 has a control groove 641 that is adapted to the rocker arm 621. The rocker arm 621 is set in the control groove 641. Switching is performed by sliding the rocker arm 621 in the control groove 641. By providing a detachable control plate 64, control plates of different specifications can be replaced. The control groove in the control plate 64 can be set to different lengths to control the flushing time. The specific scheme is as follows:

[0058] In this embodiment, the control slot 641 includes an open slot 6411 disposed at the bottom of the control plate 64, a first water outlet section 6412 connected to the open slot 6411, a second water outlet section 6413 bent and connected to the first water outlet section 6412, and a third water outlet section 6414 bent and connected to the second water outlet section 6413. When the push-pull rod 41 pushes the slide plate 63 upward, the rocker arm 621 slides sequentially from the third water outlet section 6414, the second water outlet section 6413, and the first water outlet section 6412 to the open slot 6411. At this time, the pilot valve 20 is closed to seal and replenish the water inlet pipe 11. When the push-pull rod 41 pushes the slide plate 63 downward, the rocker arm 621 slides from the open slot 6411 to the first water outlet section 6412. At the end of the first water outlet section 6412, the pilot valve 20 is opened, and the water flows from the inlet pipe 11 to the first water outlet pipe 12. The rocker arm 621 slides from the end of the first water outlet section 6412 to the end of the second water outlet section 6413, and the water flows from the inlet pipe 11 to the second water outlet pipe 13. The rocker arm 621 slides from the end of the second water outlet section 6413 to the end of the third water outlet section 6414, and the water flows from the inlet pipe 11 to the first water outlet pipe 12 for supplementary flushing. Then the pilot valve 20 is closed. A buckle 642 is provided on the top of the control panel 64, and a corresponding slot is provided on the slide plate 63. The buckle is set in the slot to achieve quick disassembly and replacement. The operation is simple, the function is powerful, and the user experience is better.

[0059] The structure and working principle of the delay valve switching component 70 in this embodiment are described in detail below: (Refer to...) Figures 1-3 As shown, there are two delay valves 30, which are respectively connected to the first water outlet pipe 12 and the second water outlet. The diameter of the water passage hole 361 of the piston rod 36 of one delay valve 30 is larger than that of the water passage hole 361 of the piston rod 36 of the other delay valve 30. There are two push-pull rods 41 connected to the piston rod 36, which are arranged on both sides of the lifting rib 411. The system further includes a delay valve switching assembly 70 connected to the two delay valves 30. The delay valve switching assembly 70 includes a push rod 71 connected to the pressure relief switch 38. The other end is connected to a lever 72 rotatably mounted on a fixed slide rail 14. The other end of the lever 72 is provided with a toggle part 721. A pin 73 is slidably mounted above the fixed slide rail 14 between two push-pull rods 41. The push-pull rod 41 is provided with a pin groove 414 corresponding to the pin 73. The middle of the pin 73 is provided with a toggle groove 731 corresponding to the toggle part 721. When the pressure relief switch 38 is pressed, the lever 72 toggle the pin 73, causing the pin 73 to insert into the pin groove 414 on the push-pull rod 41 corresponding to the delay valve 30, thereby activating the flush valve.

[0060] The working principle and specific implementation steps of this invention are described in detail below.

[0061] Reference Figure 10 As shown, by pressing the pressure relief switch 38 and then pressing the pressure relief start rod 322, the first sealing part 3221 separates from the pressure relief hole 3211, relieving pressure on the piston inner cavity 311. Water from the inlet pipe 11 enters the piston outer cavity 312 through the inlet hole 37. The water flow pushes the piston 34 upward and compresses the first spring 35. The piston rod 36 then drives the push-pull rod 41 upward. (Refer to...) Figures 11-12 As shown, at this time, the pry bar 42 is lifted by the lifting wedge block 422, the pry bar 42 is separated from the pilot valve control rod 26, the second sealing part 261 seals the second through hole 25, the elastic diaphragm 21 isolates the water inlet chamber 111 and the opening and closing chamber 112, the pilot valve 20 is in the closed state, at this time the water pressure in the water inlet pipe 11 is all applied to the piston 34, and at the same time the push-pull rod 41 pushes the slide plate 63 to move upward, and the rocker arm 621 slides sequentially from the third water outlet section 6414, the second water outlet section 6413, and the first water outlet section 6412 in the control plate 64 to the opening slot 6411;

[0062] Reference Figure 13 As shown, when the pressure relief switch 38 separates from the pressure relief start rod 322, the first sealing part 3221 seals the pressure relief hole 3211, and the inner cavity 311 no longer relieves pressure. Water in the piston outer cavity 312 slowly enters the inner cavity 311 through the water channel 331. Under the spring force of the first spring 35, the piston 34 slowly moves downward, and the piston rod 36 drives the push-pull rod 41 to move downward. (Refer to...) Figures 14-15 As shown, at this time, the lifting wedge 422 is wedged into the second inclined surface 413, the pry bar 42 is pressed down, the top pressing part 421 presses the pilot valve control rod 26, the pilot valve 20 is in the open state, the second sealing part 261 separates from the second through hole 25, and the water flows sequentially from the pressure relief chamber 23, the second through hole 25, and the third through hole 28 to the opening and closing chamber 112. The elastic diaphragm 21 is lifted upward, thereby causing the water in the inlet chamber 111 to flow to the opening and closing chamber 112. Then the water flows into the switching chamber 113, and at the same time the push-pull rod 41 pushes the slide plate 63 downward. When the rocker arm 621 is moved from the opening slot 6411 to the end of the first water outlet section 6412, the pilot valve 20 is opened, and the water flows from the inlet pipe 11 to the first water outlet pipe 12. The rocker arm 621 is moved from the end of the first water outlet section 6412 to the end of the second water outlet section 6413, and the water flows from the inlet pipe 11 to the second water outlet pipe 13. The rocker arm 621 is moved from the end of the second water outlet section 6413 to the end of the third water outlet section 6414, and the water flows from the inlet pipe 11 to the first water outlet pipe 12 for supplementary flushing. Then the pilot valve 20 is closed.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A flushing valve capable of low-pressure start, comprising a valve body (10) having an inlet and at least one outlet, and a pilot valve (20) disposed between the inlet and the outlet for controlling the flow of water, characterized in that, Also includes: The delay valve (30) has a delay valve chamber (31) communicating with the inlet. A pressure relief assembly (32) is provided above the delay valve chamber (31). A sliding piston assembly is provided inside the delay valve chamber (31) to divide the delay valve chamber (31) into an inner chamber and an outer chamber. The sliding piston assembly has a water passage groove (331) communicating with the inner chamber (311) and the outer chamber (312). The sliding piston assembly includes a delay rod (33) connected to the pressure relief assembly (32) and a piston (34) slidably disposed in the delay valve chamber (31). A water passage groove (331) is provided on the side wall of the delay rod (33). A first spring (35) is pressed on the top of the piston (34), and the other end of the first spring (35) presses on the pressure relief assembly (32). A piston rod (36) is installed at the bottom of the piston (34). A piston hole is provided on the piston (34) and the piston rod (36) along their axial direction. The delay rod (33) is axially aligned and inserted into the piston hole. A water passage hole (361) is provided on the side wall of the rod (36), and a water inlet hole (37) is provided on the water valve body (10) to connect the inlet and the outer cavity (312). When the pressure relief assembly (32) is opened, the water flow from the inlet enters the outer cavity (312) through the water inlet hole (37), the piston (34) moves upward and compresses the first spring (35), the pressure relief assembly (32) is closed, and the water flow in the outer cavity (312) enters the inner cavity (311) in sequence through the water passage hole (361) and the water passage groove (331). The first spring (35) resets and pushes the piston (34) downward. The pressure relief assembly (32) includes a pressure relief rod seat (321) disposed at the top of the delay valve chamber (31), a pressure relief hole (3211) disposed above the pressure relief rod seat (3211), a slidable pressure relief start rod (322) installed in the pressure relief hole (3211), a pressure relief switch (38) being pressed against the pressure relief start rod (322) above the pressure relief start rod (322), a first sealing part (3221) disposed on the pressure relief start rod (322), the first sealing part (3221) sealing the pressure relief hole (3211), and below the first sealing part (3221) Press the second spring (323), and the other end of the second spring (323) presses the delay rod (33). Press the pressure relief switch (38), and the pressure relief start rod (322) moves down and compresses the second spring (323). The first sealing part (3221) separates from the pressure relief hole (3211) and opens the pressure relief assembly (32). Release the pressure relief switch (38), and the second spring (323) resets and pushes the pressure relief start rod (322) upward. The first sealing part (3221) seals the pressure relief hole (3211) and closes the pressure relief assembly (32). The one-way starting mechanism (40) linked with the sliding piston assembly is configured such that when the sliding piston assembly moves in only one direction, it acts on the pilot valve (20), opens the pressure relief assembly (32) to allow water to flow into the outer cavity (312) and pushes the sliding piston assembly to move to the other side of the delay valve cavity (31). When the pilot valve (20) is closed, the one-way starting mechanism (40) does not act on the pilot valve (20), closes the pressure relief assembly (32) to allow water in the outer cavity (312) to flow into the inner cavity (311) through the water channel (331) to reset the sliding piston assembly, and the one-way starting mechanism (40) opens the pilot valve (20).

2. A flushing valve capable of low-pressure start according to claim 1, characterized in that, The water valve body (10) has multiple outlets, and the water valve body contains a switching valve (50) disposed between the multiple outlets for switching the water outlet path; and The water path switching mechanism (60) includes a rocker assembly that controls the switching valve (50) to switch the water path and a control plate assembly. The control plate assembly includes a slide plate (63) that moves synchronously with the piston and a control plate (64) that is detachably installed in the slide plate (63). A control groove (641) is provided in the control plate (64). The control groove (641) is configured to accommodate the rocker assembly to slide inside it during the piston movement, thereby switching the water path and controlling the water output duration.

3. A flushing valve capable of low-pressure start according to claim 2, characterized in that, It has multiple delay valves (30), and the water passage grooves (331) of the sliding piston assemblies in the multiple delay valves (30) are of different sizes; The delay valve switching assembly (70) is configured to switch the single delay valve (30) when the single delay valve (30) is started, and control the one-way start mechanism (40) to open the pilot valve (20).

4. A flushing valve capable of low-pressure start according to claim 3, characterized in that, The water valve body (10) has an inlet chamber (111) and an opening / closing chamber (112). The pilot valve (20) includes an elastic diaphragm (21) disposed above the opening / closing chamber (112). The elastic diaphragm (21) separates the inlet chamber (111) and the opening / closing chamber (112). A pilot valve plate (22) is disposed above the elastic diaphragm (21). A first through hole (221) is provided on the bottom wall of the pilot valve plate (22). 22) A pressure relief chamber (23) is provided above. The water inlet chamber (111) is connected to the pressure relief chamber (23) through the first through hole (221). A pilot valve starting assembly is provided on the side wall of the pressure relief chamber (23). The pilot valve starting assembly includes a control rod fixing seat (24). A second through hole (25) is provided in the control rod fixing seat (24). A slidable pilot valve control rod (26) is provided in the second through hole (25). A pilot valve control rod (26) is provided on the pilot valve control rod (26). The second sealing part (261) isolates the pressure relief chamber (23) and the second through hole (25). The second sealing part (261) presses against the third spring (27) below, and the other end of the third spring (27) presses against the upper side wall of the opening and closing chamber (112). The upper side wall of the opening and closing chamber (112) is provided with a third through hole (28). When the pilot valve control rod (26) is pressed, the second sealing part (261) separates from the second through hole (25), and the water flows... The water flows sequentially from the pressure relief chamber (23), the second through hole (25), and the third through hole (28) to the opening and closing chamber (112). The elastic diaphragm (21) is pushed upward, thereby allowing the water in the inlet chamber (111) to flow to the opening and closing chamber (112). The pilot valve control rod (26) is released, and the second sealing part (261) seals the second through hole (25), causing the elastic diaphragm (21) to reset and isolate the inlet chamber (111) and the opening and closing chamber (112).

5. A flushing valve capable of low-pressure start according to claim 4, characterized in that, A fixed slide rail (14) is provided above the main body (10) of the water valve. The one-way starting mechanism (40) includes a push-pull rod (41) connected to the piston rod (36). The push-pull rod (41) is slidably connected to the fixed slide rail (14). A lifting rib (411) is provided on the side wall of the push-pull rod (41). A first inclined surface (412) is provided in front of the lifting rib (411), and a second inclined surface (413) corresponding to the first inclined surface (412) is provided behind the lifting rib (411). A pry bar (42) is pivotally connected above the fixed slide rail (14). A top pressing part (421) is provided at the other end of the pry bar (42). The pressure section (421) presses against the pilot valve control rod (26). The pressure section (421) is provided with lifting wedges (422) on both sides corresponding to the first inclined surface (412) and the second inclined surface (413). When the piston rod (36) pushes the push-pull rod (41) to slide upward, the first inclined surface (412) lifts the lifting wedges (422) upward, so that the pressure section (421) separates from the pilot valve control rod (26). When the piston rod (36) pushes the push-pull rod (41) to slide downward, the lifting wedges (422) wedge in from below the second inclined surface (413), so that the pressure section (421) presses down on the pilot valve control rod (26).

6. A flushing valve capable of low-pressure start according to claim 5, characterized in that, The water valve body (10) has an inlet pipe (11), a first outlet pipe (12) and a second outlet pipe (13) connected to the inlet pipe (11). The inlet pipe (11) has an inlet, the first outlet pipe (12) has a first outlet, and the second outlet pipe (13) has a second outlet. The water valve body (10) has a switching chamber (113) located between the first outlet and the second outlet. The switching valve (50) is located in the switching chamber (113). The rocker assembly includes a turntable (61) connected to the switching valve (50). A swing plate (62) is connected above the turntable (61). A rocker arm (621) is provided above the swing plate (62). The rocker arm (621) is moved to make the turntable (61) rotate, thereby driving the switching valve (50) to switch the water outlet path.

7. A flushing valve capable of low-pressure start according to claim 6, characterized in that, The control slot (641) includes an open slot (6411) located at the bottom of the control plate (64), a first water outlet section (6412) connected to the open slot (6411), a second water outlet section (6413) bent and connected to the first water outlet section (6412), and a third water outlet section (6414) bent and connected to the second water outlet section (6413). When the push-pull rod (41) pushes the slide plate (63) upward, the rocker arm (621) slides sequentially from the third water outlet section (6414), the second water outlet section (6413), and the first water outlet section (6412) to the open slot (6411), at which time the pilot valve (20) is closed. The one-way start mechanism (40) does not act on the pilot valve (20). When the push-pull rod (41) pushes the slide plate (63) downward, the rocker arm (621) slides from the opening slot (6411) to the end of the first water outlet section (6412). At this time, the pilot valve (20) is opened, and the water flows from the inlet to the first outlet. The rocker arm (621) slides from the end of the first water outlet section (6412) to the end of the second water outlet section (6413). At this time, the water flows from the inlet to the second outlet. The rocker arm (621) slides from the end of the second water outlet section (6413) to the end of the third water outlet section (6414). The water flows from the inlet to the first outlet for water replenishment.

8. A flushing valve capable of low-pressure start according to claim 7, characterized in that, The delay valve switching assembly (70) includes a push rod (71) connected to the pressure relief switch (38). The other end of the push rod (71) is connected to a lever (72) rotatably mounted on a fixed slide rail (14). The other end of the lever (72) is provided with a toggle part (721). A pin (73) is slidably mounted above the fixed slide rail (14) between two push-pull rods (41). The push-pull rod (41) is provided with a pin groove (414) corresponding to the pin (73). The middle part of the pin (73) is provided with a toggle groove (731) corresponding to the toggle part (721). When the pressure relief switch (38) is pressed, the lever (72) moves the pin (73), causing the pin (73) to insert into the pin groove (414) on the push-pull rod (41) corresponding to the delay valve (30), thereby activating the flush valve.

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