Water gate hydraulic control system with hydraulic locking function

Abstract

The utility model relates to the field of hydraulic control systems, and discloses a water gate hydraulic control system with a hydraulic locking function, which comprises hydraulic oil way systems which are symmetrically arranged and used for controlling opening and closing of a gate, and each hydraulic oil way system comprises a sandwich valve group and a driving oil cylinder; valve ports at the two ends of the sandwich valve group are respectively connected with a rodless cavity and a rod cavity of the driving oil cylinder and are used for locking a piston rod of the driving oil cylinder at any position to stop moving and playing a role in maintaining the pressure of a hydraulic oil path system; the telescopic end of the driving oil cylinder is connected with the gate to control opening and closing of the gate. Through the synergistic effect of the stacked double-hydraulic-control one-way valve and the high-pressure plate type ball valve, it is ensured that the hydraulic cylinder can be stably locked at any position; and after the power-off state, the two cavities of the oil cylinder are communicated for oil return, the flap gate is driven by hydraulic power to freely turn over, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control systems, and more specifically, to a hydraulic control system for a sluice gate with a hydraulic locking function. Background Technology

[0002] Sluice gates, as important facilities in water conservancy projects, are mainly used to regulate water flow, control water levels, and ensure flood control safety. Flap gates are a common type of sluice gate, opened and closed by a hydraulic system, and are widely used in various types of sluice gates. However, in actual operation, existing hydraulic opening and closing mechanisms for flap gates have some shortcomings, especially in the event of a power outage or external interference, the flap gate may fail to lock accurately, resulting in unstable positioning. This not only affects the safety of the system but may also increase equipment maintenance costs.

[0003] To ensure the safe and stable operation of the flap gate, the hydraulic system must be able to lock and maintain the position of the hydraulic cylinder at any position of the piston rod. A hydraulic locking mechanism needs to be designed in the hydraulic gate opener to ensure that the hydraulic cylinder remains locked in any position, and that in the event of a power outage or malfunction of the hydraulic system, the flap gate can still freely rotate using hydraulic force to overcome hydraulic resistance and achieve automatic opening and closing.

[0004] Current hydraulic systems cannot yet achieve the stability required for hydraulic cylinders in any working state, provide flexible unlocking functions, and enable the hydraulically driven flap door to freely rotate after power failure. Utility Model Content

[0005] To overcome the shortcomings of the prior art, such as the inability to achieve stable locking in any position of the hydraulic cylinder and the inability to freely rotate the flap gate by water power after the hydraulic system is de-energized, this utility model provides a hydraulic control system for a sluice gate with hydraulic locking function.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A hydraulic control system for a sluice gate with hydraulic locking function includes a symmetrically arranged hydraulic oil circuit system for controlling the opening and closing of the gate, the hydraulic oil circuit system including a stacked valve group and a drive cylinder;

[0008] The two valve ports of the superimposed valve group are respectively connected to the rodless chamber and the rod chamber of the drive cylinder, which are used to lock the piston rod of the drive cylinder in any position to stop its movement, and to maintain the pressure of the hydraulic circuit system; the extension and retraction end of the drive cylinder is connected to the gate to control the opening and closing of the gate.

[0009] Furthermore, it also includes the drive source and the oil tank; the drive source is an oil pump and a drive motor, and the power output end of the drive motor is connected to the pump shaft of the oil pump through a connector; the oil tank is connected to the oil port at one end of the oil pump through a hydraulic pipe.

[0010] Preferably, the connecting element is a coupling.

[0011] Preferably, the oil pump is a plunger-type oil pump.

[0012] More preferably, the oil pump is an axial piston pump.

[0013] Furthermore, the stacked valve assembly includes a stacked dual-hydraulic control check valve and a one-way throttle valve;

[0014] The superimposed dual hydraulically controlled check valve includes a first hydraulically controlled check valve and a second hydraulically controlled check valve; the one-way throttle valve includes a first one-way throttle valve and a second one-way throttle valve;

[0015] After the pressurized oil is pumped out from the drive source, one end passes through the first one-way throttle valve and the first hydraulically controlled one-way valve in succession before entering the rodless chamber; the other end passes through the second one-way throttle valve and the second hydraulically controlled one-way valve in succession before entering the rod chamber.

[0016] Furthermore, the return port of the first hydraulic check valve is connected to the second check valve via a hose, and the return port of the second hydraulic check valve is connected to the first check valve via a hose, thus forming a locking pipeline module with hydraulic locking function.

[0017] Furthermore, a filter for filtering impurities from the hydraulic oil in the oil tank is connected to the connection section between the oil tank and the oil pump.

[0018] Furthermore, a reversing valve and an overflow valve module are successively connected to the other end of the oil pump.

[0019] The overflow port of the overflow valve module is connected to the stacked valve group and then to the drive cylinder.

[0020] Preferably, the reversing valve is an electromagnetic reversing valve.

[0021] More preferably, the directional valve is a three-position four-way solenoid directional valve.

[0022] Furthermore, the overflow valve module includes a first overflow valve and a second overflow valve;

[0023] The oil outlet of the reversing valve is connected to the first relief valve and the second relief valve respectively;

[0024] After passing through the reversing valve, the pressure oil passes through the first relief valve, then successively through the first one-way throttle valve and the first hydraulically controlled one-way valve, and finally enters the rodless chamber.

[0025] The other end passes through the second overflow valve, then successively through the second one-way throttle valve and the second hydraulically controlled one-way valve, and finally enters the rod chamber.

[0026] Furthermore, the hydraulic circuit system also includes a PLC control center and an opening meter electrically connected to the drive cylinder; the opening meter is used to detect the opening degree of the gate, and the PLC control center is used to adjust and control the hydraulic circuit system based on the feedback from the opening meter.

[0027] Furthermore, the surface of the oil tank is also equipped with a level and temperature gauge for observing the internal hydraulic oil, and an air filter is provided at the upper end to prevent air impurities from contaminating the oil. At the end of the return oil circuit where the pressurized oil returns to the oil tank, a return oil filter is also provided to improve the cleanliness of the return oil.

[0028] Furthermore, a first ball valve is provided in the intermediate section connecting the stacked valve group and the drive cylinder, and a second ball valve is also provided in the connecting bypass oil line; both the first ball valve and the second ball valve are used to regulate the pressure of the hydraulic oil circuit; the first ball valve is in the normally open state when the hydraulic oil circuit is working, and the second ball valve is in the normally closed state.

[0029] Preferably, the first ball valve and the second ball valve are plate-type high-pressure ball valves.

[0030] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0031] 1. Reliability of hydraulic locking function: The system ensures that the hydraulic cylinder can achieve stable locking in any position through the synergistic action of the superimposed double hydraulic control check valve and the high-pressure plate ball valve. Even if the hydraulic system loses power or pressure, the flap door will not move unexpectedly due to external disturbance, which greatly improves the safety and stability of the system.

[0032] 2. Flexible unlocking and free rotation: Through the design of bypass oil circuit and high-pressure plate ball valve, the system can quickly release the hydraulic lock when needed, allowing the oil in the two chambers of the hydraulic cylinder to communicate with each other. The gate can be freely rotated by the water head, meeting the sluice gate operation requirements in the absence of electricity and improving the system's adaptability.

[0033] 3. Precise motion control: With the help of the PLC control system and the opening meter, the system can monitor the opening degree of the flip door in real time and correct errors, ensuring that the two sides of the flip door open and close synchronously, which significantly improves the accuracy and efficiency of operation. Attached Figure Description

[0034] Figure 1 This is a hydraulic schematic diagram of a hydraulic control system for a sluice gate with a hydraulic locking function, as described in an embodiment of this utility model.

[0035] Figure 2 This is a schematic diagram of the hydraulic circuit of the drive cylinder in an embodiment of this utility model;

[0036] Figure 3 This is a schematic diagram of the liquid circuit of the overflow valve module according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the hydraulic circuit of the stacked valve assembly according to an embodiment of the present invention;

[0038] Figure 5 This is a top view of the hydraulic control device for a sluice gate according to an embodiment of this utility model;

[0039] Figure 6 This is a schematic diagram of the hydraulic control device for a sluice gate according to an embodiment of the present invention;

[0040] 1. Stacked valve assembly; 101. Stacked double hydraulic control check valve; 1011. First hydraulic control check valve; 1012. Second hydraulic control check valve; 102. One-way throttle valve assembly; 1021. First one-way throttle valve; 1022. Second one-way throttle valve;

[0041] 2. Drive cylinder; 201. Rodless chamber; 202. Rod chamber;

[0042] 3. Drive source; 301. Oil pump; 302. Drive motor;

[0043] 4. Fuel tank; 401. Filter; 402. Air filter; 403. Return oil filter; 404. Liquid level and temperature gauge;

[0044] 5. Relief valve module; 501. First relief valve; 502. Second relief valve;

[0045] 6. First ball valve; 7. Second ball valve; 8. Directional control valve. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments without creative effort are within the scope of protection of this application.

[0047] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] Example 1

[0049] This embodiment discloses a hydraulic control system for a sluice gate with a hydraulic locking function, including a symmetrically arranged hydraulic oil circuit system for controlling the opening and closing of the gate, the hydraulic oil circuit system including a stacked valve group 1 and a drive cylinder 2;

[0050] The valve ports at both ends of the stacked valve group 1 are connected to the rodless chamber 201 and the rod chamber 202 of the drive cylinder 2, respectively, to drive the piston rod of the cylinder 2 to lock in any position and stop moving, and to maintain pressure in the hydraulic circuit system; the extension and retraction end of the drive cylinder 2 is connected to the gate to control the opening and closing of the gate.

[0051] The hydraulic circuit system also includes a PLC control center and an opening meter that are electrically connected to the drive cylinder 2 respectively; the opening meter is used to detect the opening degree of the gate, and the PLC control center is used to adjust and control the hydraulic circuit system based on the feedback from the opening meter.

[0052] A first ball valve 6 is provided in the middle section connecting the stacked valve group 1 and the drive cylinder 2, and a second ball valve 7 is also provided in the connecting bypass oil line; both the first ball valve 6 and the second ball valve 7 are used to regulate the pressure of the hydraulic oil circuit; the first ball valve 6 is in the normally open state when the hydraulic oil circuit is working, and the second ball valve 7 is in the normally closed state.

[0053] The hydraulic circuit system also includes a drive source 3 and an oil tank 4; the drive source 3 is an oil pump 301 and a drive motor 302, and the power output end of the drive motor 302 is connected to the pump shaft of the oil pump 301 through a connector; the oil tank 4 is connected to the oil port at one end of the oil pump 301 through a hydraulic pipe.

[0054] The stacked valve assembly 1 includes a stacked dual hydraulic control check valve 101 and a one-way throttle valve assembly 102;

[0055] The stacked dual hydraulic control check valve 101 includes a first hydraulic control check valve 1011 and a second hydraulic control check valve 1012; the one-way throttle valve group 102 includes a first one-way throttle valve 1021 and a second one-way throttle valve 1022.

[0056] After the pressure oil is pumped out from the drive source 3, one end passes through the first one-way throttle valve 1021 and the first hydraulic control one-way valve 1011 in succession before entering the rodless chamber 201; the other end passes through the second one-way throttle valve 1022 and the second hydraulic control one-way valve 1012 in succession before entering the rod chamber 202.

[0057] The return valve port of the first hydraulic check valve 1011 is connected to the second check throttle valve 1022 via a hose, and the return valve port of the second hydraulic check valve 1012 is connected to the first check throttle valve 1021 via a hose, so as to form a locking pipeline module with hydraulic locking function.

[0058] The other end of the oil pump 301 is connected to a reversing valve 8 and an overflow valve module 5.

[0059] After the overflow port of the overflow valve module 5 is connected to the superimposed valve group 1, it is connected to the drive cylinder 2.

[0060] The overflow valve module 5 includes a first overflow valve 501 and a second overflow valve 502;

[0061] The oil outlet of the reversing valve 8 is connected to the first relief valve 501 and the second relief valve 502 respectively;

[0062] After passing through the reversing valve 8, the pressure oil passes through the first relief valve 501, then successively through the first one-way throttle valve 1021 and the first hydraulic check valve 1011, and finally enters the rodless chamber 201.

[0063] The other end passes through the second overflow valve 502, then successively through the second one-way throttle valve 1022 and the second hydraulic check valve 1012, and finally enters the rod chamber 202.

[0064] In the specific implementation process, when the gate needs to be opened, the unloaded start-up drive source 3 is activated. After the drive motor 302 rotates, it will drive the axial piston oil pump 301. The power output shaft of the drive motor 302 is transmitted to the oil pump 301 through the coupling. At this time, the a end of the solenoid directional valve 8 is energized. The P port of the solenoid directional valve is connected to the B port, and the T port is connected to the A port. After the pressurized oil is pumped out from the oil pump 301, it flows out through the P port of the solenoid directional valve 8 to the B port, and then through the second relief valve. After the pressure is adjusted, the oil flows successively to the second one-way throttle valve 1022 and the second hydraulic control one-way valve 1012 of the stacked valve group 1, and finally to the rod chamber 202 of the drive cylinder 2, which drives the sluice gate to open. The rodless chamber 201 at the other end of the drive cylinder 2 is squeezed by the piston rod and begins to return oil. The pressurized oil starts from the rodless chamber 201, flows along the first hydraulic control one-way valve 1011 and the first one-way throttle valve 1021, and then flows through the A port of the solenoid directional valve 8 to the T port, and then returns to the oil tank 4.

[0065] When the gate needs to be closed, the drive source 3 is started under no-load. After the drive motor 302 rotates, the power of the axial piston oil pump 301 is transmitted from the power output shaft of the drive motor 302 to the oil pump 301 via the coupling. At this time, the b end of the solenoid directional valve 8 is energized, and the P port of the solenoid directional valve is connected to the A port, and the T port is connected to the B port. After the pressurized oil is pumped out from the oil pump 301, it flows out through the P port of the solenoid directional valve 8 to the A port, and then flows through the first relief valve 501 to adjust the pressure. After the force is applied, the oil flows successively to the first one-way throttle valve 1021 and the first hydraulic control one-way valve 1011 of the superimposed valve group 1, and finally flows to the rodless chamber 201 of the drive cylinder 2, which drives the sluice gate to open; the piston rod of the rod chamber 202 at the other end of the drive cylinder 2 is squeezed by the pressure oil and begins to return oil. The pressure oil starts from the rod chamber 202, flows along the second hydraulic control one-way valve 1012 and the second one-way throttle valve 1022, and then flows through the B port of the solenoid directional valve 8 to the T port, and then returns to the oil tank 4.

[0066] Example 2

[0067] This embodiment discloses another hydraulic control system for a sluice gate with a hydraulic locking function, including a symmetrically arranged hydraulic oil circuit system for controlling the opening and closing of the gate. The hydraulic oil circuit system includes a stacked valve group 1 and a drive cylinder 2.

[0068] The valve ports at both ends of the stacked valve group 1 are connected to the rodless chamber 201 and the rod chamber 202 of the drive cylinder 2, respectively, to drive the piston rod of the cylinder 2 to lock in any position and stop moving, and to maintain pressure in the hydraulic circuit system; the extension and retraction end of the drive cylinder 2 is connected to the gate to control the opening and closing of the gate.

[0069] The hydraulic circuit system also includes a PLC control center and an opening meter electrically connected to the drive cylinder 2. The opening meter is used to detect the opening and closing degree of the gate, and the PLC control center is used to adjust and control the hydraulic circuit system based on the feedback from the opening meter. A position correction bypass is provided between the oil pump 301 and the solenoid directional valve 8. This bypass is equipped with an adjustable throttle valve and a solenoid check valve connected in series. The hydraulic fluid flows through the throttle valve and then through the solenoid check valve back to the oil tank 4.

[0070] A first ball valve 6 is provided in the middle section connecting the stacked valve group 1 and the drive cylinder 2, and a second ball valve 7 is also provided in the connecting bypass oil line; both the first ball valve 6 and the second ball valve 7 are used to regulate the pressure of the hydraulic oil circuit; the first ball valve 6 is in the normally open state when the hydraulic oil circuit is working, and the second ball valve 7 is in the normally closed state.

[0071] It should be noted that both the first and second ball valves are plate-type high-pressure ball valves.

[0072] The hydraulic circuit system also includes a drive source 3 and an oil tank 4; the drive source 3 is an oil pump 301 and a drive motor 302, and the power output end of the drive motor 302 is connected to the pump shaft of the oil pump 301 through a connector; the oil tank 4 is connected to the oil port at one end of the oil pump 301 through a hydraulic pipe.

[0073] The pressure value of the oil pumped out by the drive source 3 is detected by the connected pressure detection component, which includes a pressure sensor, a pressure gauge and its switch installed between the oil pump 301 and the solenoid directional valve 8.

[0074] The stacked valve assembly 1 includes a stacked dual hydraulic control check valve 101 and a one-way throttle valve assembly 102;

[0075] The stacked dual hydraulic control check valve 101 includes a first hydraulic control check valve 1011 and a second hydraulic control check valve 1012; the one-way throttle valve group 102 includes a first one-way throttle valve 1021 and a second one-way throttle valve 1022.

[0076] After the pressure oil is pumped out from the drive source 3, one end passes through the first one-way throttle valve 1021 and the first hydraulic control one-way valve 1011 in succession before entering the rodless chamber 201; the other end passes through the second one-way throttle valve 1022 and the second hydraulic control one-way valve 1012 in succession before entering the rod chamber 202.

[0077] The return valve port of the first hydraulic check valve 1011 is connected to the second check throttle valve 1022 via a hose, and the return valve port of the second hydraulic check valve 1012 is connected to the first check throttle valve 1021 via a hose, so as to form a locking pipeline module with hydraulic locking function.

[0078] The other end of the oil pump 301 is connected to a reversing valve 8 and an overflow valve module 5.

[0079] After the overflow port of the overflow valve module 5 is connected to the superimposed valve group 1, it is connected to the drive cylinder 2.

[0080] The overflow valve module 5 includes a first overflow valve 501 and a second overflow valve 502;

[0081] The oil outlet of the reversing valve 8 is connected to the first relief valve 501 and the second relief valve 502 respectively;

[0082] After passing through the reversing valve 8, the pressure oil passes through the first relief valve 501, then successively through the first one-way throttle valve 1021 and the first hydraulic check valve 1011, and finally enters the rodless chamber 201.

[0083] The other end passes through the second overflow valve 502, then successively through the second one-way throttle valve 1022 and the second hydraulic check valve 1012, and finally enters the rod chamber 202.

[0084] In the specific implementation process, the flow path of the pressurized oil in the oil circuit is similar to that in Example 1, except that:

[0085] The movements of the hydraulic cylinders on both sides may become asynchronous due to system pressure fluctuations, load differences, or other factors, resulting in inconsistent opening degrees at both ends of the flap gate. In this case, the opening meter that detects the opening degree of the gates on both sides needs to be pre-set. The PLC control center is configured so that when the opening difference between the two sides exceeds a certain set value (e.g., 20mm) during the gate opening process, the electromagnetic check valve in the position correction bypass of the hydraulic circuit system controlled by either side of the gate is energized. The electromagnetic check valve, receiving control signals from the PLC control center and the opening meter, automatically switches the hydraulic oil flow path when it detects that the opening degree on both sides of the flap gate exceeds the set error range (e.g., 20mm). At this time, the automatically corrected gate stops after reaching its position, thus correcting the movement of one side of the hydraulic cylinder and restoring the synchronization of the two sides of the gate. If the pressure value of the oil pump 301 rises to the set value set by the pressure sensor, the drive source 3 will also be forced to stop.

[0086] When the solenoid check valve is not energized, the flow of hydraulic oil is restricted, keeping the oil circuit closed and thus locking the current state of the drive cylinder 2, preventing displacement of the drive cylinder 2 due to external pressure. When the solenoid check valve is energized, the valve core switches to open the oil circuit, allowing hydraulic oil to flow into or out of the drive cylinder 2, thereby adjusting and controlling the movement of the drive cylinder 2. When the system needs to lock the drive cylinder 2 or stop its operation, the solenoid check valve switches to the closed state, effectively preventing the flow of oil, preventing accidental movement, and protecting the safety of equipment and personnel.

[0087] The core purpose of the electromagnetic check valve is to provide position correction for the hydraulic cylinders on both sides of the flap gate, while controlling the flow of hydraulic oil to ensure the accuracy and synchronization of the system's actions. Working in conjunction with a PLC, opening meter, and pressure sensor, it achieves both precise control and safety protection during the gate's opening and closing process.

[0088] When the gate needs to be freely rotated under hydraulic pressure, the second ball valve 7 on the bypass oil line (the second ball valve is a high-pressure ball valve) can be opened. At this time, the two chambers of the driving cylinder 2 are connected to the return oil, so that the gate can be driven by water to overcome resistance and drive the flap gate to rotate freely in the absence of electricity.

[0089] Example 3

[0090] This embodiment discloses another hydraulic control system for a sluice gate with a hydraulic locking function, including a symmetrically arranged hydraulic oil circuit system for controlling the opening and closing of the gate. The hydraulic oil circuit system includes a stacked valve group 1 and a drive cylinder 2.

[0091] The valve ports at both ends of the stacked valve group 1 are connected to the rodless chamber 201 and the rod chamber 202 of the drive cylinder 2, respectively, to drive the piston rod of the cylinder 2 to lock in any position and stop moving, and to maintain pressure in the hydraulic circuit system; the extension and retraction end of the drive cylinder 2 is connected to the gate to control the opening and closing of the gate.

[0092] The hydraulic circuit system also includes a drive source 3 and an oil tank 4; the drive source 3 is an oil pump 301 and a drive motor 302, and the power output end of the drive motor 302 is connected to the pump shaft of the oil pump 301 through a connector; the oil tank 4 is connected to the oil port at one end of the oil pump 301 through a hydraulic pipe.

[0093] A filter 401 is connected to the connection between the oil tank 4 and the oil pump 301 to filter impurities from the hydraulic oil in the oil tank 4. The filter 401 filters solid particles, dust, or other impurities from the hydraulic oil, preventing them from entering the hydraulic pump 301 and the entire hydraulic system. This avoids wear on the hydraulic pump and other precision hydraulic components (such as valves and drive cylinders 2). By filtering contaminants from the hydraulic oil, the wear rate of hydraulic components can be effectively reduced, improving the overall reliability and service life of the hydraulic system. The filter 401 is the first line of defense for the hydraulic system, protecting the hydraulic pump from contaminants and ensuring the normal operation of the system.

[0094] The surface of the oil tank 4 is also equipped with a liquid level and temperature gauge 404 for observing the internal hydraulic oil, and an air filter 402 is provided at the upper end to prevent air impurities from contaminating the oil. At the end of the return oil circuit, where the pressure oil returns to the oil tank, a return oil filter 403 is also provided to improve the cleanliness of the return oil.

[0095] The level and temperature gauge 404 is used to monitor the hydraulic oil level in the tank in real time, ensuring sufficient oil reserve in the hydraulic system. If the level is below the safe value, it may lead to abnormal operation of the hydraulic system. Simultaneously, the gauge allows operators to monitor the hydraulic oil temperature, preventing problems such as oil deterioration, viscosity reduction, or system overheating due to excessively high oil temperature. Both excessively high and low hydraulic oil temperatures can affect the normal operation of hydraulic components. The level and temperature gauge 404 provides intuitive feedback on the hydraulic oil status, facilitating timely oil replenishment or troubleshooting by maintenance personnel, ensuring stable system operation. The air filter 402 ensures the cleanliness of the hydraulic oil within the tank 4, preventing external contaminants from entering the system. The return oil filter 403 is the second line of defense in the system, working in conjunction with the inlet filter 401 to form a complete oil filtration system, improving the overall operational reliability and lifespan of the hydraulic system.

[0096] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A hydraulic control system for a sluice gate having a hydraulic locking function, characterized by, The hydraulic oil circuit system for controlling the opening and closing of the gate comprises a superimposed valve group (1) and a driving oil cylinder (2); The two end valve ports of the superimposed valve group (1) are connected with the rodless cavity (201) and the rod cavity (202) of the driving oil cylinder (2) respectively, for locking the piston rod of the driving oil cylinder (2) at any position to stop movement, and for pressure maintaining of the hydraulic oil circuit system; The telescopic end of the driving oil cylinder (2) is connected with the gate to control the opening and closing of the gate.

2. The hydraulic control system for a sluice gate having a hydraulic lock function according to claim 1, wherein The driving source (3) and the oil tank (4) are further included; the driving source (3) is an oil pump (301) and a driving motor (302), the power output end of the driving motor (302) is in transmission connection with the pump shaft of the oil pump (301) through a connecting member; the oil tank (4) is connected with the oil port at one end of the oil pump (301) through a hydraulic pipe.

3. The hydraulic control system for a sluice gate having a hydraulic lock function according to claim 2, wherein The superimposed valve group (1) comprises a superimposed double hydraulic control check valve (101) and a check valve group (102); The superimposed double hydraulic control check valve (101) comprises a first hydraulic control check valve (1011) and a second hydraulic control check valve (1012); the check valve group (102) comprises a first check valve (1021) and a second check valve (1022); After being pumped out from the driving source (3), the pressure oil successively passes through the first check valve (1021) and the first hydraulic control check valve (1011) at one end, and enters the rodless cavity (201); at the other end, the pressure oil successively passes through the second check valve (1022) and the second hydraulic control check valve (1012), and enters the rod cavity (202).

4. The hydraulic control system for a sluice gate having a hydraulic lock function according to claim 3, wherein The oil return valve port of the first hydraulic control check valve (1011) is connected with the second check valve (1022) through a hose, and the oil return valve port of the second hydraulic control check valve (1012) is connected with the first check valve (1021) through a hose, so as to form a locking pipeline module with hydraulic locking function.

5. The hydraulic control system for a sluice gate having a hydraulic lock function according to claim 2, wherein A filter (401) for filtering impurities in the hydraulic oil of the oil tank (4) is connected on the connection section of the oil tank (4) and the oil pump (301).

6. The hydraulic control system for a sluice gate having a hydraulic lock function according to claim 3, wherein The other end oil port of the oil pump (301) is successively connected with a reversing valve (8) and an overflow valve module (5); The overflow port of the overflow valve module (5) is connected with the superimposed valve group (1), and is connected with the driving oil cylinder (2).

7. The hydraulic control system for a sluice gate having a hydraulic lock function according to claim 6, wherein The overflow valve module (5) comprises a first overflow valve (501) and a second overflow valve (502); The oil outlet ports of the reversing valve (8) are connected with the first overflow valve (501) and the second overflow valve (502) respectively; After passing through the reversing valve (8), the pressure oil passes through the first overflow valve (501) at one end, and then successively passes through the first check valve (1021) and the first hydraulic control check valve (1011), and finally enters the rodless cavity (201); At the other end, the pressure oil passes through the second overflow valve (502), and then successively passes through the second check valve (1022) and the second hydraulic control check valve (1012), and finally enters the rod cavity (202).

8. The hydraulic control system for a sluice gate having a hydraulic lock function according to claim 1, wherein The hydraulic oil circuit system further comprises a PLC control center and an opening degree instrument electrically connected with the driving oil cylinder (2) respectively; the opening degree instrument is used for detecting the opening degree of the gate opening and closing, and the PLC control center is used for adjusting and controlling the hydraulic oil circuit system according to the feedback of the opening degree instrument.

9. The hydraulic control system for a sluice gate having a hydraulic lock function according to claim 2, wherein The surface of the oil tank (4) is further provided with a liquid level and temperature gauge (404) for observing the internal hydraulic oil, the upper end is provided with an air filter (402) for preventing air impurities from being polluted, and the end of the oil return circuit pressure oil returning to the oil tank is further provided with an oil return filter (403) for improving the cleanliness of the oil return.

10. The hydraulic control system for a sluice gate having a hydraulic lock function according to claim 1, wherein The intermediate section of the superimposed valve group (1) and the driving oil cylinder (2) is provided with a first ball valve (6) and a second ball valve (7) connected with the bypass oil circuit; the first ball valve (6) and the second ball valve (7) are both used for adjusting the pressure of the hydraulic oil circuit; the first ball valve (6) is in a normally open state when the hydraulic oil circuit works, and the second ball valve (7) is in a normally closed state.

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