A hydraulic drive structure and a toilet device having the same

Abstract

The application provides a hydraulic driving structure and a closestool device with the same, the hydraulic driving structure comprises a body, the body is provided with a water inlet channel, a water outlet channel, a pressure relief channel and a control cavity, the control cavity is provided with a water inlet port communicated with the water inlet channel, a water outlet port communicated with the water outlet channel and a pressure relief port communicated with the pressure relief channel, and the body is provided with a valve core for controlling the control cavity to switch among a water inlet state, a pressure maintaining state and a pressure relief state; when the control cavity is in the water inlet state, the valve core opens the water inlet port and closes the pressure relief port; when the control cavity is in the pressure maintaining state, water in the water outlet channel cannot flow out from the water inlet channel and the pressure relief channel; and when the control cavity is in the pressure relief state, the valve core closes the water inlet port and opens the pressure relief port. The hydraulic driving structure can make the pressure maintaining of the hydraulic cavity at the rear end not need to be maintained by the water pressure of the water inlet channel, so that the pressure maintaining effect is not influenced by the water pressure of the water inlet channel and the stability is better.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic valves, and in particular to a hydraulic drive structure and a toilet device having the structure. Background Art

[0002] The hydraulic drain valve installed in the existing toilet water tank usually relies on the water inlet pressure of the water inlet pipe to drive the drain valve. Since it takes some time to open the drain valve, in order to maintain the drain valve in the open state so that the water in the toilet water tank has enough time to be discharged, the water inlet pipe needs to remain connected to the hydraulic chamber of the drain valve so that the hydraulic chamber of the drain valve can maintain the corresponding pressure, that is, the hydraulic chamber of the drain valve needs to maintain pressure to maintain the drainage state.

[0003] The hydraulic chamber of the existing hydraulic drain valve needs to maintain pressure by maintaining communication with the water inlet pipe. The pressure maintaining effect is greatly affected by the water pressure of the water inlet pipe, which can easily cause unstable pressure maintenance and poor drainage stability. For example, when the water inlet pipe is used to supply water to multiple water channels, it may cause unstable water pressure, which in turn affects the pressure maintaining effect of the hydraulic chamber of the drain valve, and may cause the drain valve to close prematurely. Summary of the Invention

[0004] In view of the problem that the existing hydraulic drain valve needs to maintain pressure by keeping the hydraulic chamber connected to the water inlet pipe, which has poor drainage stability, the present invention provides a hydraulic drive structure and a toilet device with the structure.

[0005] To achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0006] A hydraulic drive structure includes a main body, which is provided with a water inlet channel, a water outlet channel, a pressure relief channel and a control chamber, the control chamber is provided with a water inlet connected to the water inlet channel, a water outlet connected to the water outlet channel and a pressure relief port connected to the pressure relief channel, and a valve core is provided in the main body for controlling the control chamber to switch between a water inlet state, a pressure holding state and a pressure relief state; when the control chamber is in the water inlet state, the valve core opens the water inlet and closes the pressure relief port, and the water inlet channel is connected to the water outlet channel; when the control chamber is in the pressure holding state, water in the water outlet channel will not flow out from the water inlet channel and the pressure relief channel; when the control chamber is in the pressure relief state, the valve core closes the water inlet and opens the pressure relief port, and the water outlet channel is connected to the pressure relief channel.

[0007] Preferably, when the control chamber is in the pressure-maintaining state, the valve core closes the water inlet and the pressure relief port, so that the water outlet is disconnected from the water inlet and the pressure relief port; or, a one-way valve is further provided at the water inlet for controlling the one-way flow of water from the water inlet channel into the control chamber. When the control chamber is in the pressure-maintaining state, the valve core closes the pressure relief port, so that the water in the water outlet channel does not flow out of the pressure relief channel, and under the action of the one-way valve, the water in the water outlet channel does not flow out of the water inlet channel.

[0008] Preferably, a control channel is further provided in the body, and the control cavity is provided with a control port connected with the water outlet end of the control channel, and the water inlet end of the control channel is connected with the water inlet channel and the pressure relief channel; it also includes a control valve for controlling the opening and closing of the control port, and the position of the valve core is controlled by controlling the opening and closing of the control port; in the water-flowing state of the water inlet channel, when the control valve opens the control port, the valve core is moved by the water pressure to the position where the control cavity is in the water-flowing state; in the water-flowing state, when the control valve closes the control port, the valve core maintains its position so that the control cavity is in the pressure-maintaining state; in the pressure-maintaining state and the water-stopping state of the water inlet channel, when the control valve opens the control port, the valve core is moved by an elastic reset force to the position where the control cavity is in the pressure relief state.

[0009] Preferably, a pressure relief chamber is provided on the pressure relief channel, and the water outlet, the water inlet channel and the control channel are all connected to the pressure relief chamber.

[0010] Preferably, a one-way valve is provided at the water inlet, and the valve core can move between a first position and a second position in the control chamber under the action of the water pressure difference and the elastic restoring force; when the control chamber is in the water inlet state, the valve core is located in the first position, and the water in the water inlet channel flows to the water outlet channel via the one-way valve; when the control chamber is in the pressure maintaining state, the valve core remains in the first position, and the one-way valve prevents the water in the water outlet channel from flowing to the water inlet channel; when the control chamber is in the pressure relief state, the valve core is located in the second position, the valve core opens the pressure relief port, and the water outlet channel is connected to the pressure relief channel.

[0011] Preferably, one side of the valve core is provided with a first sealing portion that cooperates with the opening and closing of the water inlet and a second sealing portion that cooperates with the opening and closing of the pressure relief port, and the other side of the valve core is provided with a back pressure portion that forms a back pressure cavity with the inner wall of the control cavity, the control port is communicated with the back pressure cavity, and the cross-sectional area of ​​the back pressure portion of the valve core on one side is larger than the sum of the cross-sectional areas of the first sealing portion and the second sealing portion on one side of the valve core; when the water inlet channel is in the water-flowing state, when the control valve controls the control port to open, the water in the water inlet channel flows into the back pressure cavity via the control channel, so that the valve core moves from the second position to the first position under the action of the pressure difference of the water pressure on both sides.

[0012] Preferably, the one-way valve is a set of Y-shaped sealing members provided on the valve core, and the Y-shaped sealing member cooperates with the inner wall of the water inlet.

[0013] Preferably, the elastic reset force is provided by an elastic member provided in the control chamber. When the water inlet channel is in a water-stop state, when the control valve controls the control port to open, the valve core is reset to the second position under the action of the elastic member and the water in the back pressure chamber is discharged from the control channel to the pressure relief channel.

[0014] Preferably, the control valve is a first solenoid valve, and the time between the first solenoid valve being opened for the first time and the second time being opened is the time when the control chamber is in the pressure maintaining state; it also includes a second solenoid valve for controlling the water flow and water cutoff of the water inlet channel, and a main control board for controlling the opening and closing of the first solenoid valve and the second solenoid valve, and the first solenoid valve and the second solenoid valve are both connected to the main control board.

[0015] The present invention also provides a toilet device, including a hydraulic drain valve for controlling the drainage of a toilet tank, and also including the above-mentioned hydraulic drive structure, wherein the hydraulic cavity of the hydraulic drain valve is connected to the water outlet channel.

[0016] The beneficial effects of the present invention are as follows:

[0017] The hydraulic drive structure of the present invention is provided with a water inlet channel, a water outlet channel, a pressure relief channel, and a control chamber, as well as a valve core for controlling the control chamber to switch between a water inlet state, a pressure holding state, and a pressure relief state. When the control chamber is in the water inlet state, the valve core opens the water inlet and closes the pressure relief port. The water inlet channel is connected to the water outlet channel to provide pressurized water to the hydraulic chamber at its rear end. When the control chamber is in the pressure holding state, water in the water outlet channel does not flow out of the water inlet channel and the pressure relief channel. When the control chamber is in the pressure relief state, the valve core closes the water inlet and opens the pressure relief port. The water outlet channel is connected to the pressure relief channel for normal pressure relief. Thus, the hydraulic chamber (e.g., the hydraulic chamber of a hydraulic drain valve for a toilet tank) provided at the rear end of the hydraulic drive structure can be pressure-maintained. The pressure maintenance is not maintained by the water pressure of the water inlet channel. Therefore, the function of the hydraulic chamber at the rear end of the hydraulic drive structure is not affected by the water pressure of the water inlet channel, thereby allowing the water in the water inlet channel to be shut off or switched to other uses during the pressure holding stage. A toilet device that utilizes the hydraulic drive structure to drive a hydraulic drain valve in a toilet water tank can effectively improve the reliability and stability of drainage and ensure the normal flushing function of the toilet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : A schematic diagram of the overall structure of the hydraulic drive structure of the first embodiment of the present invention;

[0019] Figure 2 : A schematic cross-sectional view of the hydraulic drive structure of the first embodiment of the present invention;

[0020] Figure 3 : Schematic diagram of the control chamber of the hydraulic drive structure of the first embodiment of the present invention in a pressure relief state (the hydraulic drain valve is not open);

[0021] Figure 4 : Schematic diagram of the control chamber of the hydraulic drive structure of the first embodiment of the present invention in a water-filled state (the hydraulic drain valve is activated to drain water);

[0022] Figure 5 : Schematic diagram of the control chamber of the hydraulic drive structure of the first embodiment of the present invention in a pressure-maintaining state (the hydraulic drain valve continuously drains water);

[0023] Figure 6 : Schematic diagram of the control chamber of the hydraulic drive structure of the first embodiment of the present invention in a pressure relief state (hydraulic drain valve closed);

[0024] Figure 7 : A schematic structural diagram of a valve core according to a first embodiment of the present invention;

[0025] Figure 8: A schematic structural diagram of the valve core of the first embodiment of the present invention after the first sealing portion, the second sealing portion, the one-way valve and the second sealing ring are removed;

[0026] Figure 9 : A front view of the valve core according to the first embodiment of the present invention;

[0027] Figure 10 : A cross-sectional view of the hydraulic drive structure of the second embodiment of the present invention (the valve core is in the second position and the control chamber is in a pressure relief state);

[0028] Figure 11 : A cross-sectional view of the hydraulic drive structure of the second embodiment of the present invention (the valve core is in the first position, and the control chamber is in the water filling state or the pressure maintaining state);

[0029] Figure 12 : Schematic diagram of the assembly structure of the hydraulic drive structure and the hydraulic drain valve of the present invention;

[0030] In the figure: 10. Main body; 11. Water inlet channel; 12. Water outlet channel; 13. Pressure relief channel; 131. Pressure relief chamber; 14. Control chamber; 141. Water inlet; 142. Water outlet; 143. Pressure relief port; 144. Control port; 15. Control channel; 16. Back pressure chamber; 20. Valve core; 21. First sealing part; 211. First mounting groove; 212. Second mounting groove; 22. Second sealing part; 221. Third mounting groove; 23. Back pressure part; 24. First shaft; 25. Second shaft; 231. Fourth mounting groove; 232. Spring mounting seat; 30. One-way valve (Y-shaped seal); 40. Elastic part; 50. Control valve; 60. Second sealing ring; 70. Hydraulic drain valve; 80. Air partition; 90. Motor. DETAILED DESCRIPTION

[0031] The existing hydraulic drain valve requires the hydraulic chamber to be connected to the water inlet pipe to maintain pressure, which has the problem of poor drainage stability. Therefore, the present invention proposes a new solution. For a clearer presentation, the present invention is described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1-9 A hydraulic drive structure according to a first embodiment of the present invention includes a main body 10, which is provided with a water inlet channel 11, a water outlet channel 12, a pressure relief channel 13, and a control chamber 14. The control chamber 14 is provided with a water inlet 141 communicating with the water inlet channel 11, a water outlet 142 communicating with the water outlet channel 12, and a pressure relief port 143 communicating with the pressure relief channel 13. A valve core 20 is provided within the main body 10 for controlling the control chamber 14 to switch between a water inlet state, a pressure holding state, and a pressure relief state.

[0033] See also Figure 4When the control chamber 14 is in the water inlet state, the valve core 20 opens the water inlet 141 and closes the pressure relief port 143, thereby connecting the water inlet channel 11 with the water outlet channel 12 to provide hydraulic pressure to the hydraulic chamber downstream of the water outlet channel 12;

[0034] See also Figure 5 When the control chamber 14 is in the pressure-maintaining state, the water in the water outlet channel 12 will not flow out from the water inlet channel 11 and the pressure relief channel 13; in this embodiment, in the pressure-maintaining state, the water in the water outlet channel 12 will not flow out from the water inlet channel 11 and the pressure relief channel 13 is achieved in the following manner: a one-way valve 30 is further provided at the water inlet 141 for controlling the unidirectional flow of water from the water inlet channel 11 into the control chamber 14; when the control chamber 14 is in the pressure-maintaining state, the valve core 20 maintains its position unchanged, and the valve core 20 keeps closing the pressure relief channel 143, so that the water in the water outlet channel 12 will not flow out from the pressure relief channel 13, and the valve core 20 keeps opening the water inlet 141, but under the action of the one-way valve 30, the water in the water outlet channel 12 will not flow out from the water inlet 141. Of course, in other embodiments not shown in the figures, it is also possible to choose that when the control chamber 14 is in the pressure-maintaining state, the control valve core 20 moves to a position where both the water inlet 141 and the pressure relief port 143 are closed, so that the water outlet 142 is disconnected from the water inlet 141 and the pressure relief port 143 respectively, thereby preventing the water in the water outlet channel 12 from flowing out of the water inlet channel 11 and the pressure relief channel 13.

[0035] See also Figure 3 and Figure 6 When the control chamber 14 is in the pressure relief state, the valve core 20 closes the water inlet 141 and opens the pressure relief port 143, and the water outlet channel 12 is connected to the pressure relief channel 13, so that the water in the hydraulic chamber (not shown) at the rear end of the hydraulic drive structure (i.e., downstream of the water outlet channel 12) can be discharged through the water outlet channel 12 and the pressure relief channel 13 to prepare for the next hydraulic drive.

[0036] See also Figure 2-6The body 10 is further provided with a control channel 15. The control chamber 14 is provided with a control port 144 connected to the water outlet end of the control channel 15. The water inlet end of the control channel 15 is connected to the water inlet channel 11 and the pressure relief channel 13. That is, when water flows through the water inlet channel 11, part of the water will flow to the control channel 15 for control, and part of the water will flow to the pressure relief channel 13. In this way, when the hydraulic drive structure is not working, the water remaining in the water inlet channel 11 can be slowly discharged from the pressure relief channel 13 to avoid the growth of scale in the water channel, which may cause water channel blockage or poor sealing. It can be understood that the flow cross-sectional area of ​​the pressure relief channel 13 needs to be small to avoid a large amount of water flowing away from the pressure relief channel 13 in vain when water flows through the water inlet channel 11. Preferably, a pressure relief chamber 131 is provided on the pressure relief channel 13, and the water outlet 142, the water inlet channel 11 and the control channel 15 are all connected to the pressure relief chamber 131.

[0037] The hydraulic drive structure further includes a control valve 50 for controlling the opening and closing of the control port 144 , and the position of the valve core 20 is controlled by controlling the opening and closing of the control port 144 .

[0038] The position of the valve core 20 is controlled by controlling the opening and closing of the control port 144 in the following manner: when the water inlet channel 11 is in the water-flowing state, when the control valve 50 opens the control port 144, the valve core 20 is moved by the water pressure to the position where the control chamber 14 is in the water-inlet state; when the control valve 50 closes the control port 144 in the water-inlet state, the valve core 20 maintains its position so that the control chamber 14 is in the pressure-maintaining state; when the control valve 50 opens the control port 144 in the pressure-maintaining state and the water inlet channel 11 is in the water-stopping state, the valve core 20 is moved by an elastic reset force to the position where the control chamber 14 is in the pressure-releasing state.

[0039] Continue to see Figure 2-6 As mentioned above, a one-way valve 30 is provided at the water inlet 141, and the valve core 20 can move between a first position and a second position in the control chamber 14 under the action of the water pressure difference and the elastic restoring force; when the control chamber 14 is in the water inlet state, the valve core 20 is located in the first position, and the water in the water inlet channel 11 flows to the water outlet channel 12 via the one-way valve 30; when the control chamber 14 is in the pressure maintaining state, the valve core 20 remains in the first position, and the one-way valve 30 prevents the water in the water outlet channel 12 from flowing to the water inlet channel 11; when the control chamber 14 is in the pressure relief state, the valve core 20 is located in the second position, and the valve core 20 opens the pressure relief port 143, and the water outlet channel 12 is connected to the pressure relief channel 13.

[0040] See also Figure 7-9 The valve core 20 is provided with a first sealing portion 21 that cooperates with the opening and closing of the water inlet 141 and a second sealing portion 22 that cooperates with the opening and closing of the pressure relief port 143 on one side, and a back pressure portion 23 that forms a back pressure cavity 16 with the inner wall of the control cavity 14 on the other side of the valve core 20. Specifically, the bottom surface of the back pressure portion 23 and the inner wall of the control cavity 14 form the back pressure cavity 16. The control port 144 is connected to the back pressure cavity 16. Figure 9 As shown, the water pressure cross-sectional area S1 on the side of the back pressure portion 23 of the valve core 20 is greater than the sum of the water pressure cross-sectional areas on the sides of the first sealing portion 21 and the second sealing portion 22 of the valve core 20, that is, S1>S2+S3. Since the water pressure cross-sectional areas on both sides of the valve core 20 are different, when both sides of the valve core 20 are subjected to the water pressure of the water inlet channel, under the same water inlet pressure, the water pressure force on the side of the back pressure portion 23 of the valve core 20 is greater than the water pressure force on the sides of the first sealing portion 21 and the second sealing portion 22 of the valve core 20, thereby utilizing the water pressure difference to enable the valve core 20 to achieve a movable switching state. In this way, when the water inlet channel 11 is in the water flow state, when the control valve 50 controls the control port 144 to open, the water in the water inlet channel 11 flows into the back pressure chamber 16 via the control channel 15, causing the valve core 20 to move from the second position to the first position under the pressure difference of the water pressure on both sides.

[0041] In this embodiment, the valve core 20 preferably includes a first shaft body 24 and a second shaft body 25 arranged side by side on the top surface of the back pressure portion 23. The first sealing portion 21 is a sealing sheet provided on the end of the first shaft body 24 away from the back pressure portion 23. The first shaft body 24 extends from the water inlet 141 of the control chamber 14 and is located outside the control chamber 14. The second sealing portion 22 is composed of a first sealing ring provided on the first shaft body 24 and the second shaft body 25. When the second sealing portion 22 closes the pressure relief port 143, the first sealing ring moves with the valve core 20 to separate the water outlet channel 12 and the pressure relief channel 13. When the second sealing portion 22 opens the pressure relief port 143, the first sealing ring moves with the valve core 20 to connect the water outlet channel 12 and the pressure relief channel 13. The first sealing ring is preferably a Y-shaped sealing ring.

[0042] The one-way valve 30 is a Y-shaped seal provided on the first shaft 24 of the valve core 20, and the Y-shaped seal cooperates with the inner wall of the water inlet 141. The first shaft 24 is provided with a first mounting groove 211 for mounting the Y-shaped seal 31.

[0043] The back pressure portion 23 of the valve core 20 is also provided with a second sealing ring 60. The second sealing ring 60 cooperates with the inner wall of the control chamber 14 to seal the back pressure chamber 16. The first shaft 24 is also provided with a second mounting groove 212 for mounting the first sealing ring. The second shaft 25 is provided with a third mounting groove 221 for mounting the first sealing ring. The second mounting groove 212 and the third mounting groove 221 are located at the same horizontal height. The back pressure portion 23 is provided with a fourth mounting groove 231 for mounting the second sealing ring 60. In this embodiment, the second sealing ring 60 is also a Y-shaped sealing ring. In this embodiment, designing the one-way valve 30, the first sealing ring, and the second sealing ring 60 as a Y-shaped sealing ring structure can improve sealing performance and facilitate smooth sliding of the valve core 20.

[0044] The elastic restoring force in this embodiment is provided by the elastic member 40 in the control chamber 14 . The elastic member 40 is a spring. The back pressure portion 23 is provided with a spring mounting seat 232 for mounting the spring.

[0045] When the water inlet channel 11 is in a water-stopped state and the control valve 50 controls the control port 144 to open, the valve core 20 is reset to the second position under the action of the elastic member 40 and the water in the back pressure chamber 16 is discharged from the control channel 15 to the pressure relief channel 13 .

[0046] The control valve 50 is a first solenoid valve, and the time between the first opening and the second opening of the first solenoid valve 50 is the time when the control chamber 14 is in the pressure maintaining state.

[0047] The hydraulic drive structure also includes a second solenoid valve (not shown) for controlling the water flow and water cutoff of the water inlet channel 11 and a main control board (not shown) for controlling the opening and closing of the first solenoid valve 50 and the second solenoid valve. The first solenoid valve 50 and the second solenoid valve are both connected to the main control board.

[0048] The brief working process / working principle of this embodiment is as follows:

[0049] See also Figure 3 (The control chamber 14 is in a pressure relief state, and the hydraulic drain valve 70 is not open.) The control valve 50 (the first solenoid valve) is not actuated, the valve core 20 is in the second position, and the second solenoid valve is open, allowing water to flow through the water inlet channel 11. Part of the water in the water inlet channel 11 (waterway a) flows out through the pressure relief port 143 (waterway d), and the remaining water remains in the control channel 15 (waterway b).

[0050] See also Figure 4(The control chamber 14 is in the water inlet state, and the hydraulic drain valve 70 is activated to drain water). The control valve 50 (first solenoid valve) is opened to open the control port 144. At this time, a small part of the water flow (water path a) in the water inlet channel 11 will flow out from the pressure relief channel 13 (water path d), and another small part of the water will flow through the control channel 15 (water path b) and into the back pressure chamber 16 (water path g) via the control port 144. As a result, the valve core 20 moves upward to the first position under the action of the water pressure, thereby opening the water inlet 141 and closing the pressure relief port 143. At this time, most of the water in the water inlet channel 11 enters the control chamber 14 and flows out from the water outlet channel 12 (water path f), and then flows into the hydraulic drain valve 70 at the rear end to drive the hydraulic drain valve 70 to open for drainage.

[0051] See also Figure 5 (The control chamber 14 is in a pressure-maintaining state, and the hydraulic drain valve 70 continues to drain water). After the hydraulic drain valve 70 is opened, the control valve 50 (the first solenoid valve) is closed, thereby closing the control port 144. In this way, the water in the back-pressure chamber 16 will not flow out from the control port 144, and the valve core 20 remains in the first position. At this time, the second sealing portion 22 of the valve core 20 keeps closing the pressure relief port 143, so that the water in the water outlet channel 12 will not flow out from the pressure relief port 143. Although the first sealing portion 21 of the valve core 20 keeps opening the water inlet 141, the water in the water outlet channel 12 will not flow out from the water inlet 141 under the action of the one-way valve 30, so that the control chamber 14 is in a pressure-maintaining state, and the hydraulic drain valve 70 continues to drain water (the pressure-maintaining time is the drainage duration). At this time, the second solenoid valve can be closed to stop the water inlet channel (or the water inlet channel can be switched for use in other waterways). The water pressure in the water inlet channel does not affect the pressure-maintaining effect.

[0052] See also Figure 6 , (the control chamber 14 is in the pressure relief state, and the hydraulic drain valve 70 is closed). When the second solenoid valve is closed and the water inlet channel 11 is in the water-stopped state, the control valve 50 (first solenoid valve) is started again to open the control port 144. The back pressure chamber 16 is no longer pressurized. The valve core 20 moves downward to the second position under the elastic force of the spring (elastic member 40), thereby closing the water inlet 141 and opening the pressure relief port 143. The water outlet 142 is connected to the pressure relief port 143. At the same time, the water in the back pressure chamber 16 flows out from the control port 144 to the control channel 15 under the squeeze of the valve core 20, and then flows out from the pressure relief channel 13. The water in the hydraulic chamber of the hydraulic drain valve 70 flows through the water outlet channel 12 to the pressure relief port 143 and then discharges from the pressure relief channel 13 (e waterway). At this point, the hydraulic drain valve 70 can be closed after losing the hydraulic action. Finally, the control valve 50 closes the control port 144 again and returns to Figure 3 The status shown.

[0053] In the above control process, the second solenoid valve is opened at the beginning ( Figure 3 ) and then open the first solenoid valve ( Figure 4 ), of course, it is also possible to open the first solenoid valve first and then open the second solenoid valve, or open the first solenoid valve and the second solenoid valve at the same time. Figure 6 After the pressure relief state is reached, the first solenoid valve may not be closed. Of course, if the second solenoid valve is used as the water inlet valve of the water tank (as mentioned above), it is necessary to Figure 6 After the pressure relief state is completed, the first solenoid valve is closed, so that the hydraulic drive structure returns to Figure 3 The status shown is available.

[0054] In other implementations, the specific structure of the valve core 20 can be set as needed. For example, it is not necessary to set the first shaft body 24 and the second shaft body 25.

[0055] See also Figure 10 and Figure 11 A hydraulic drive structure according to a second embodiment of the present invention includes a body 10, which is provided with a water inlet channel 11, a water outlet channel 12, a pressure relief channel 13, and a control chamber 14. The control chamber 14 is provided with a water inlet 141 communicating with the water inlet channel 11, a water outlet 142 communicating with the water outlet channel 12, and a pressure relief port 143 communicating with the pressure relief channel 13. A valve core 20 is provided within the body 10 for controlling the control chamber 14 to switch between a water inlet state, a pressure holding state, and a pressure relief state.

[0056] The valve core 20 is provided with a first sealing portion 21 that cooperates with the water inlet 141 for opening and closing, and a second sealing portion 22 that cooperates with the pressure relief port 143 for opening and closing.

[0057] See also Figure 11 When the control chamber 14 is in the water inlet state, the valve core 20 opens the water inlet 141 and closes the pressure relief port 143, thereby connecting the water inlet channel 11 with the water outlet channel 12 to provide hydraulic pressure to the hydraulic chamber downstream of the water outlet channel 12;

[0058] Continue to see Figure 11When the control chamber 14 is in the pressure-maintaining state, the water in the water outlet channel 12 will not flow out from the water inlet channel 11 and the pressure relief channel 13; in this embodiment, in the pressure-maintaining state, the water in the water outlet channel 12 will not flow out from the water inlet channel 11 and the pressure relief channel 13 is achieved in the following manner: a one-way valve 30 is further provided at the water inlet 141 for controlling the one-way flow of water from the water inlet channel 11 into the control chamber 14; when the control chamber 14 is in the pressure-maintaining state, the valve core 20 maintains its position unchanged, and the valve core 20 keeps closing the pressure relief port 143, so that the water in the water outlet channel 12 will not flow out from the pressure relief channel 13, and the valve core 20 keeps opening the water inlet 141, but under the action of the one-way valve 30, the water in the water outlet channel 12 will not flow out from the water inlet 141. Of course, in other embodiments not shown in the figures, it is also possible to choose that when the control chamber 14 is in the pressure-maintaining state, the control valve core 20 moves to a position where both the water inlet 141 and the pressure relief port 143 are closed, so that the water outlet 142 is disconnected from the water inlet 141 and the pressure relief port 143 respectively, thereby preventing the water in the water outlet channel 12 from flowing out of the water inlet channel 11 and the pressure relief channel 13.

[0059] See also Figure 10 When the control chamber 14 is in the pressure relief state, the valve core 20 closes the water inlet 141 and opens the pressure relief port 143, and the water outlet channel 12 is connected to the pressure relief channel 13, so that the water in the hydraulic chamber (not shown) at the rear end of the hydraulic drive structure (i.e., downstream of the water outlet channel 12) can be discharged through the water outlet channel 12 and the pressure relief channel 13 to prepare for the next hydraulic drive.

[0060] Continue to see Figure 10 and Figure 11 As mentioned above, a one-way valve 30 is provided at the water inlet 141, and a motor 90 is used to control the valve core 20 to move between a first position and a second position in the control chamber 14; when the control chamber 14 is in the water inlet state, the valve core 20 is located in the first position, and the water in the water inlet channel 11 flows to the water outlet channel 12 via the one-way valve 30; when the control chamber 14 is in the pressure maintaining state, the valve core 20 remains in the first position, and the one-way valve 30 prevents the water in the water outlet channel 12 from flowing to the water inlet channel 11; when the control chamber 14 is in the pressure relief state, the valve core 20 is located in the second position, and the valve core 20 opens the pressure relief port 143, and the water outlet channel 12 is connected to the pressure relief channel 13.

[0061] The one-way valve 30 is a Y-shaped seal mounted on the valve core 20, which engages with the inner wall of the water inlet 141. The valve core 20 is provided with a first mounting groove 211 for mounting the Y-shaped seal 31. Preferably, the second sealing portion 22 also adopts a Y-shaped seal structure to achieve a better sealing effect.

[0062] See also Figure 12 This embodiment also provides a toilet device utilizing the aforementioned hydraulic drive structure, comprising a hydraulic drain valve 70 for controlling drainage from a toilet tank (not shown) and the aforementioned hydraulic drive structure. The hydraulic chamber of the hydraulic drain valve 70 is connected to the water outlet channel 12 of the hydraulic drive structure. Preferably, an air barrier 80 is provided on the water inlet channel 11 of the hydraulic drive structure. The air barrier 80 connects the water inlet channel 11 to the outside air, thereby preventing siphoning and backflow of water. The inlet of the water inlet channel 11 is connected to an external water inlet pipe (e.g., a tap water pipe). It is worth mentioning that the hydraulic drive structure of the present invention is particularly suitable for the water inlet channel 11 with the air partition 80, which can ensure the stability of the water tank discharge volume. The specific reason is: when the water inlet channel 11 is flowing with water, some water will often splash into the water tank from the air partition 80, thereby changing the water volume of the water tank; when the existing technology relies on the water pressure of the water inlet channel 11 to maintain pressure, due to the existence of the air partition 80, the amount of water splashed into the water tank from the air partition 80 when the water inlet channel 11 is flowing with water will vary depending on the water supply pressure, resulting in a large difference in the water tank discharge volume and poor discharge volume stability; while using the hydraulic drive structure of the present invention, the water inlet channel 11 does not need to remain in a water-flowing state when maintaining pressure. In this way, the water inlet channel 11 can be closed to stop water in the pressure maintaining state, so that no water will splash into the water tank from the air partition 80 at this stage, so the water tank discharge volume is stable. In addition, when the hydraulic drain valve 70 is not working, the air partition 80 can also serve as an outlet for the water inlet channel 11 to fill the water tank with water. In this way, the second solenoid valve is also used as the water inlet valve of the water tank. The water tank does not need to be equipped with an additional water inlet valve, which saves costs and space in the water tank, and the structure is simpler.

[0063] In this embodiment, the water inlet channel 11 with the air partition 80 is connected to the body 10 through threads.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the above embodiments provide a detailed description of the present invention, relevant technical personnel should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modifications and equivalent replacements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A hydraulic drive structure, characterized in that: The closure of the closure is connected to the control chamber, and the closure is connected to the control chamber. The closure is connected to the control chamber by a valve. When the closure is in the water inlet state, the valve opens the water inlet and closes the pressure relief port, and the water inlet channel is connected to the water outlet channel. When the closure is in the pressure-maintaining state, the water in the water outlet channel will not flow out of the water inlet channel and the pressure relief channel. When the closure is in the pressure-relief state, the valve closes the water inlet and opens the pressure relief port, and the water outlet channel is connected to the pressure relief channel.

2. A hydraulic drive structure according to claim 1, characterized in that: When the control chamber is in the pressure-maintaining state, the valve core closes the water inlet and the pressure relief port, so that the water outlet is disconnected from both the water inlet and the pressure relief port; or The water inlet is also provided with a one-way valve for controlling the water flow of the water inlet channel to flow into the control chamber in one direction. When the control chamber is in the pressure maintaining state, the valve core closes the pressure relief port so that the water in the water outlet channel will not flow out of the pressure relief channel, and under the action of the one-way valve, the water in the water outlet channel will not flow out of the water inlet channel.

3. The hydraulic drive structure according to claim 1, characterized in that: A control channel is also provided in the body, and the control cavity is provided with a control port connected with the water outlet end of the control channel, and the water inlet end of the control channel is connected with the water inlet channel and the pressure relief channel; it also includes a control valve for controlling the opening and closing of the control port, and the position of the valve core is controlled by controlling the opening and closing of the control port; when the water inlet channel is in the water-flowing state, when the control valve opens the control port, the valve core is moved by the water pressure to the position where the control cavity is in the water-inlet state; when the control valve closes the control port in the water-inlet state, the valve core maintains its position so that the control cavity is in the pressure-maintaining state; in the pressure-maintaining state and the water-stopping state of the water inlet channel, when the control valve opens the control port, the valve core is moved by an elastic reset force to the position where the control cavity is in the pressure relief state.

4. A hydraulic drive structure according to claim 3, characterized in that: A pressure relief chamber is provided on the pressure relief channel, and the water outlet, the water inlet channel and the control channel are all communicated with the pressure relief chamber.

5. The hydraulic drive structure according to claim 3, characterized in that: A one-way valve is provided at the water inlet, and the valve core can move between a first position and a second position in the control chamber under the action of the water pressure difference and the elastic restoring force; when the control chamber is in the water inlet state, the valve core is located in the first position, and the water in the water inlet channel flows to the water outlet channel via the one-way valve; when the control chamber is in the pressure maintaining state, the valve core remains in the first position, and the one-way valve prevents the water in the water outlet channel from flowing to the water inlet channel; when the control chamber is in the pressure relief state, the valve core is located in the second position, and the valve core opens the pressure relief port, and the water outlet channel is connected to the pressure relief channel.

6. The hydraulic drive structure according to claim 5, characterized in that: One side of the valve core is provided with a first sealing portion that cooperates with the opening and closing of the water inlet and a second sealing portion that cooperates with the opening and closing of the pressure relief port, and the other side of the valve core is provided with a back pressure portion that forms a back pressure cavity with the inner wall of the control cavity, and the control port is communicated with the back pressure cavity, and the cross-sectional area of ​​the back pressure portion of the valve core on one side is larger than the sum of the cross-sectional areas of the first sealing portion and the second sealing portion on one side of the valve core; when the water inlet channel is in the water-flowing state, when the control valve controls the control port to open, the water in the water inlet channel flows into the back pressure cavity via the control channel, so that the valve core moves from the second position to the first position under the action of the pressure difference of the water pressure on both sides.

7. The hydraulic drive structure according to claim 6, characterized in that: The one-way valve is a set of Y-shaped sealing components arranged on the valve core, and the Y-shaped sealing components are matched with the inner wall of the water inlet.

8. The hydraulic drive structure according to claim 6, characterized in that: The elastic reset force is provided by an elastic member provided in the control chamber. When the water inlet channel is in a water-stop state and the control valve controls the control port to open, the valve core is reset to the second position under the action of the elastic member and the water in the back pressure chamber is discharged from the control channel to the pressure relief channel.

9. The hydraulic drive structure according to claim 3, characterized in that: The control valve is a first solenoid valve, and the time between the first opening and the second opening of the first solenoid valve is the time when the control chamber is in the pressure maintaining state; it also includes a second solenoid valve for controlling the water flow and water cutoff of the water inlet channel, and a main control board for controlling the opening and closing of the first solenoid valve and the second solenoid valve, and the first solenoid valve and the second solenoid valve are both connected to the main control board.

10. A toilet device comprising a hydraulic drain valve for controlling drainage of a toilet tank, characterized in that: It also includes the hydraulic drive structure according to any one of claims 1 to 9, wherein the hydraulic chamber of the hydraulic drain valve is connected to the water outlet channel.

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