Relay oil supply system and gate device

Abstract

The invention relates to a relay oil supply system and a gate device. The relay oil supply system comprises a hydraulic station oil tank, a relay oil tank and a first hydraulic pump. Wherein the hydraulic station oil tank is used for storing oil, the relay oil tank is communicated with the hydraulic station oil tank, the hydraulic station oil tank can supply oil to the relay oil tank, one end of the first hydraulic pump is communicated with the relay oil tank, the other end of the first hydraulic pump is used for being communicated with the hydraulic execution structure, and the first hydraulic pump is used for conveying the oil in the relay oil tank to the hydraulic execution structure. The relay oil tank is additionally arranged between the hydraulic station oil tank and the hydraulic execution structure, the length of a middle pipeline between the oil tank for supplying oil to the hydraulic execution structure and the hydraulic execution structure can be reduced, the working efficiency of the hydraulic system is improved, and after the length of the middle pipeline is reduced, hydraulic reversing impact can be reduced, and the service life of the hydraulic system is prolonged. In addition, the hydraulic station oil tank can provide oil liquid for the relay oil tank, so that it is guaranteed that enough oil liquid in the relay oil tank is provided for the hydraulic execution structure.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hydraulic oil supply systems, and in particular, to a relay oil supply system and a gate device. Background Art

[0002] Some equipment is driven by a hydraulic system. The hydraulic system usually includes an oil tank for providing hydraulic oil and a hydraulic execution structure for driving the equipment to perform related actions. The hydraulic execution structure includes a hydraulic actuator for driving the equipment and a first hydraulic circuit for controlling the action of the hydraulic actuator. The oil tank provides oil to the first hydraulic circuit through an intermediate pipeline to control the action of the hydraulic actuator. In the related art, many times, due to the large demand for hydraulic oil by the hydraulic actuator that drives the equipment, it is usually necessary to set up a large hydraulic station. The hydraulic oil is supplied to the hydraulic actuator through the oil tank of the established hydraulic station. However, due to the limited installation layout space near the equipment, the hydraulic station needs to be arranged in a spacious but distant location, which makes the intermediate pipeline between the oil tank of the hydraulic station and the first hydraulic circuit and the hydraulic cylinder longer. The longer intermediate pipeline will result in higher pipeline loss, reducing the working efficiency of the hydraulic system. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a relay oil supply system and a gate device, which can reduce the length of the intermediate pipeline between the hydraulic actuator structure and the oil tank that supplies oil to the hydraulic actuator structure, thereby improving the working efficiency of the hydraulic system. After the intermediate pipeline length is reduced, the hydraulic switching impact can be reduced, and the life of each component and pipeline in the hydraulic system can be increased.

[0004] In order to achieve the above objectives, the first aspect of the present disclosure provides a relay oil supply system, comprising:

[0005] Hydraulic station oil tank, used to store oil;

[0006] a relay oil tank, connected to the hydraulic station oil tank, and the hydraulic station oil tank can supply oil to the relay oil tank; and

[0007] A first hydraulic pump has one end connected to the relay oil tank and the other end used to communicate with the hydraulic execution structure. The first hydraulic pump is used to transport the oil in the relay oil tank to the hydraulic execution structure.

[0008] Optionally, the hydraulic station oil tank and the relay oil tank are connected via a first oil supply oil circuit and a first oil return oil circuit;

[0009] A second hydraulic pump is provided on the first oil supply line for supplying hydraulic oil to the relay tank;

[0010] The first oil return circuit is used to transport part of the oil in the relay tank back to the hydraulic station tank when the oil in the relay tank reaches a preset height.

[0011] Optionally, the overflow port on the relay tank that is connected to the first oil return line is located at a higher height than the oil return port on the hydraulic station tank that is connected to the first oil return line; and / or

[0012] A first overflow valve is connected to the oil line connecting the second hydraulic pump and the relay oil tank.

[0013] Optionally, the relay oil supply system further comprises a liquid level gauge, a thermometer and a controller, and the liquid level gauge, the thermometer and the second hydraulic pump are respectively connected to the controller for communication;

[0014] The liquid level gauge is used to monitor the oil height in the relay oil tank and feed back the oil height signal to the controller. The thermometer is used to monitor the oil temperature in the relay oil tank and feed back the oil temperature signal to the controller. The controller is used to control the operation of the second hydraulic pump based on the oil height signal fed back by the liquid level gauge and the oil temperature signal fed back by the thermometer.

[0015] Optionally, the relay oil supply system also includes a hydraulic motor, which is driven and connected to the second hydraulic pump. The first hydraulic pump is constructed as a double hydraulic pump, and the second hydraulic pump is driven by the hydraulic motor. The main pump of the double hydraulic pump is connected to the hydraulic execution structure. The main pump of the double hydraulic pump is used to pump the oil in the relay oil tank to the hydraulic execution structure. The auxiliary pump of the double hydraulic pump is connected to the hydraulic motor. The auxiliary pump of the double hydraulic pump is used to supply oil to the hydraulic motor so that the hydraulic motor drives the second hydraulic pump.

[0016] Optionally, the relay oil supply system further comprises a hydraulic motor drivingly connected to the second hydraulic pump, the hydraulic motor being in communication with the first hydraulic pump, the first hydraulic pump being further configured to supply oil to the hydraulic motor so that the hydraulic motor drives the second hydraulic pump, and a switch valve being provided on the oil circuit connecting the hydraulic motor and the first hydraulic pump for controlling the on-off of the oil circuit between the hydraulic motor and the first hydraulic pump; or

[0017] The relay oil supply system also includes a third hydraulic pump and a hydraulic motor drivingly connected to the second hydraulic pump. The third hydraulic pump is in communication with the hydraulic motor and is used to pump oil to the hydraulic motor so that the hydraulic motor drives the second hydraulic pump.

[0018] Optionally, the relay oil supply system also includes a first reversing valve, the oil inlet of the first reversing valve is connected to the auxiliary pump of the double hydraulic pump, the oil inlet of the first reversing valve is connected to the auxiliary pump of the double hydraulic pump, the working oil port of the first reversing valve is respectively connected to the hydraulic motor and the relay oil tank, and the first reversing valve is constructed to allow the double hydraulic pump to selectively pump oil to one of the hydraulic motor and the relay oil tank when it is in different working positions.

[0019] Optionally, the relay oil supply system also includes a first reversing valve, the oil inlet of the first reversing valve is connected to the third hydraulic pump, the working oil port of the first reversing valve is connected to the hydraulic motor and the relay oil tank respectively, and the first reversing valve is constructed to allow the third hydraulic pump to selectively pump oil to one of the hydraulic motor and the relay oil tank when in different working positions.

[0020] Optionally, the relay oil tank is located at a higher height than the hydraulic station oil tank; and / or

[0021] The volume of the relay oil tank is smaller than the volume of the hydraulic station oil tank.

[0022] A second aspect of the present disclosure provides a gate device, comprising a gate, a hydraulic execution structure of the gate, and the relay oil supply system as described above, wherein the hydraulic execution structure comprises a hydraulic cylinder for driving the gate to move and a first hydraulic circuit for controlling the movement of the hydraulic cylinder, and the relay oil supply system is connected to the first hydraulic circuit and is used to supply oil to the first hydraulic circuit to drive the hydraulic cylinder to move.

[0023] Through the above-mentioned technical solution, the hydraulic station tank in the relay oil supply system is used to store oil, and the hydraulic station tank supplies oil to the relay tank. One end of the first hydraulic pump is connected to the relay tank, and the other end is used to connect to the hydraulic actuator structure. The first hydraulic pump is used to transfer the oil in the relay tank to the hydraulic actuator structure. Providing the relay tank between the hydraulic station tank and the hydraulic actuator structure can reduce the length of the intermediate pipeline between the hydraulic actuator structure and the tank supplying oil to the hydraulic actuator structure, thereby improving the operating efficiency of the hydraulic system. This reduced intermediate pipeline length can also reduce hydraulic switching shock and increase the life of the hydraulic system. In addition, the hydraulic station tank can supply oil to the relay tank to ensure that there is sufficient oil in the relay tank to supply the hydraulic actuator structure.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 is a schematic diagram of a relay oil supply system in communication with a hydraulic actuator structure provided in some exemplary embodiments of the present disclosure;

[0027] Figure 2 1 is an oil circuit diagram provided in some exemplary embodiments of the present disclosure when the first reversing valve is in the first working position and the hydraulic motor drives the second hydraulic pump to work, wherein the arrows indicate the path through which the oil flows;

[0028] Figure 3 is an oil circuit diagram of oil pumped through the first reversing valve to the relay oil tank when the first reversing valve is in the second working position, provided in some exemplary embodiments of the present disclosure, wherein arrows indicate the path through which the oil flows;

[0029] Figure 4 is a schematic diagram of a relay oil supply system connected to a hydraulic actuator structure provided in some other exemplary embodiments of the present disclosure;

[0030] Figure 5 1 is an oil circuit diagram provided in some other exemplary embodiments of the present disclosure when the first reversing valve is in the first working position and the hydraulic motor drives the second hydraulic pump to work, wherein the arrows indicate the paths through which the oil flows;

[0031] Figure 6 1 is an oil circuit diagram of oil pumped through the first reversing valve to the relay oil tank when the first reversing valve is in the second working position, provided in some other exemplary embodiments of the present disclosure, wherein arrows indicate the paths through which the oil flows;

[0032] Figure 7 is a schematic diagram of a relay oil supply system connected to a hydraulic actuator structure provided in some further exemplary embodiments of the present disclosure;

[0033] Figure 8 1 is an oil circuit diagram provided in some exemplary embodiments of the present disclosure when the switching valve is in an open state and the hydraulic motor drives the second hydraulic pump to work, wherein the arrows indicate the paths through which the oil flows.

[0034] Description of Reference Numerals

[0035] 10-Hydraulic station oil tank; 11-First oil supply oil circuit; 12-First oil return oil circuit; 13-Second hydraulic pump; 14-Hydraulic motor; 15-First non-return valve; 16-First overflow oil circuit; 17-First overflow valve; 18-First filter; 20-Relay oil tank; 21-Breathing valve; 22-Thermometer; 23-Liquid level gauge; 24-First reversing valve; 25-Second oil supply oil circuit; 26-Second oil return oil circuit; 27-First auxiliary oil supply oil circuit; 28-Second overflow valve; 29-Third overflow valve; 30-First hydraulic pump; 300-Double hydraulic pump; 31-Main pump; 32-Auxiliary pump; 33-Second reversing valve; 34-Second non-return valve; 35-Third non-return valve; 40-Hydraulic execution structure; 41-Hydraulic actuator; 42-First hydraulic circuit; 43-Third hydraulic pump; 44-Switch valve. DETAILED DESCRIPTION

[0036] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0037] In this disclosure, unless otherwise specified, directional terms such as "inner" and "outer" refer to the inside and outside of the outline of a component or structure itself. Unless otherwise specified, the terms "first" and "second" are used to distinguish one element from another and do not convey order or importance. Furthermore, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same element.

[0038] Some equipment is driven by a hydraulic system. The hydraulic system usually includes a tank for supplying hydraulic oil and a hydraulic actuator structure that drives the equipment to perform related actions. The hydraulic actuator structure includes a hydraulic actuator for driving the equipment and a first hydraulic circuit that controls the action of the hydraulic actuator. The tank supplies oil to the first hydraulic circuit through an intermediate pipeline to control the action of the hydraulic actuator. In many cases, since the hydraulic actuator that drives the equipment has a large demand for hydraulic oil, it is usually necessary to set up a large hydraulic station to supply hydraulic oil to the hydraulic actuator through the oil tank of the hydraulic station. However, due to the limited installation layout space near the equipment, the hydraulic station needs to be arranged in a spacious but distant location, which makes the intermediate pipeline between the oil tank of the hydraulic station and the first hydraulic circuit and the hydraulic cylinder longer. The longer intermediate pipeline will result in higher pipeline losses, reducing the working efficiency of the hydraulic system.

[0039] For example, a hydraulic system is used to drive the gates of a hydropower station or dam to open or close. The hydraulic system that drives the gates to open or close typically includes a tank for supplying hydraulic oil and a hydraulic actuator structure that drives the gates to open and close. The hydraulic actuator structure includes a hydraulic cylinder for driving the gates and a first hydraulic circuit that controls the hydraulic cylinder's movement. The tank supplies oil to the first hydraulic circuit through an intermediate pipeline to control the movement of the hydraulic cylinder. Often, because the hydraulic cylinders that drive the gates have large bores and long strokes, they require a large amount of hydraulic oil. This often requires the installation of a large hydraulic station, which supplies hydraulic oil to the hydraulic cylinders through the station's tank. However, the installation space near the gates is often limited, requiring the hydraulic station to be located in a large, remote location. This results in long intermediate pipelines between the hydraulic station's tank, the first hydraulic circuit, and the hydraulic cylinders. These long intermediate pipelines result in high pipeline losses, reducing the efficiency of the hydraulic system.

[0040] Based on the above technical problems, the first aspect of the present disclosure provides a relay oil supply system, such as Figures 1 to 8 As shown, the hydraulic system includes a hydraulic station tank 10, a relay tank 20, and a first hydraulic pump 30. The hydraulic station tank 10 stores oil, while the relay tank 20 is connected to the hydraulic station tank 10 and can supply oil to the relay tank 20. One end of the first hydraulic pump 30 is connected to the relay tank 20, and the other end is connected to the hydraulic actuator 40. The first hydraulic pump 30 is used to transfer oil from the relay tank 20 to the hydraulic actuator 40. Adding the relay tank 20 between the hydraulic station tank 10 and the hydraulic actuator 40 reduces the length of the intermediate pipeline between the tank and the hydraulic actuator 40, improving the operating efficiency of the hydraulic system. This reduced intermediate pipeline length also reduces hydraulic switching shock and improves the life of the hydraulic system. Furthermore, the hydraulic station tank 10 can supply oil to the relay tank 20, ensuring sufficient oil in the relay tank 20 for the hydraulic actuator 40.

[0041] In the above-described embodiment, the hydraulic actuator structure 40 can be configured in any suitable manner depending on the application scenario of the relay oil supply system. For example, the hydraulic actuator structure 40 may include a first hydraulic circuit 42 and a hydraulic actuator 41. The first hydraulic circuit 42 is the hydraulic circuit that controls the operation of the hydraulic actuator 41. When the relay oil supply system is applied to a gate system at a hydropower station or dam, the hydraulic actuator 41 may be configured as a hydraulic cylinder that drives the gate to open or close, and the first hydraulic circuit 42 may be configured as the hydraulic circuit that controls the operation of the hydraulic cylinder. The relay oil supply system is connected to the first hydraulic circuit 42 to supply oil to the first hydraulic circuit 42, thereby driving the operation of the hydraulic cylinder. When supplying oil to the hydraulic actuator structure in a gate system at a hydropower station or dam, the distance between the hydraulic station oil tank 10 and the hydraulic actuator structure 40 is typically long, resulting in a long pipeline. Therefore, a relay oil tank 20 is added between the hydraulic station oil tank 10 and the hydraulic actuator structure 40. The length of the intermediate pipeline between the oil tank and the hydraulic actuator 40 that supplies oil to the gate device can be reduced, thereby improving the operating efficiency of the hydraulic system. This reduced intermediate pipeline length can also reduce hydraulic switching shock and extend the life of the hydraulic system. The hydraulic station oil tank 10 can supply oil to the relay oil tank 20, ensuring that there is sufficient oil in the relay oil tank 20 to supply the hydraulic actuator 40 of the gate device.

[0042] In addition, it should be noted that the hydraulic station oil tank 10 can also be constructed as other forms of oil tanks that can achieve the same functions as the hydraulic station oil tank 10, and the hydraulic station oil tank 10 is mainly used to store a large amount of oil.

[0043] In some other embodiments, the relay oil supply system can also be applied to other different scenarios to provide hydraulic pressure to other equipment.

[0044] like Figures 1 to 8 As shown, in some embodiments, the hydraulic station tank 10 and the relay tank 20 are connected via a first oil supply circuit 11 and a first oil return circuit 12. A second hydraulic pump 13 is provided on the first oil supply circuit 11 for providing hydraulic oil to the relay tank 20. The first oil return circuit 12 is used to transport part of the oil in the relay tank 20 back to the hydraulic station tank 10 when the oil in the relay tank 20 reaches a preset height, so as to prevent excessive oil in the tank.

[0045] In the above-described embodiment, when the oil in the relay tank 20 reaches a preset level, various methods are available for transferring a portion of the oil from the relay tank 20 back to the hydraulic station tank 10. For example, the overflow port on the relay tank 20 connected to the first oil return line 12 can be located at a higher level than the oil return port on the hydraulic station tank 10 connected to the first oil return line. When the oil level in the relay tank 20 reaches the overflow port, the oil can be transferred back to the hydraulic station tank 10 along the first oil return line 12. Specifically, the overflow port connecting the first oil return line 12 with the relay tank 20 can be located on the sidewall of the relay tank 20. A first filter 18 can be provided on the first oil return line 12 to filter the oil flowing to the hydraulic station tank 10, ensuring cleaner oil flowing from the relay tank 20 to the hydraulic station tank 10 through the first oil return line 12.

[0046] In other embodiments, the overflow port on the relay tank 20 that is connected to the first oil return line 12 may also be set at the bottom of the relay tank 20, a solenoid valve that controls the opening and closing of the first oil return line 12 may be set on the first oil return line 12, and a liquid level gauge 23 for detecting the oil level in the relay tank 20 may be set in the relay tank 20. When the oil level in the relay tank 20 is detected to have reached a preset overflow height, the liquid level gauge 23 feeds back a height signal to the controller, which controls the solenoid valve on the first oil return line 12 to open, thereby connecting the first oil return line 12 and transferring part of the oil in the relay tank 20 back to the hydraulic station tank 10. When the liquid level gauge 23 detects that the level has dropped to a preset overflow stop height, the liquid level gauge 23 feeds back a signal to the controller, which controls the solenoid valve on the first oil return line 12 to close. In addition, a hydraulic pump can also be provided on the first oil return line 12. When the oil in the relay tank 20 reaches a preset height, the hydraulic pump is turned on to pump the oil in the relay tank 20 back to the hydraulic station tank 10. Of course, other forms can also be adopted, which will not be described here.

[0047] like Figures 1 to 8 As shown, in addition, a first one-way valve 15 is provided on the first oil supply line 11 between the second hydraulic pump 13 and the relay tank 20. The first one-way valve 15 allows the second hydraulic pump 13 to pump the oil in the hydraulic station tank 10 to the relay tank 20 through the first oil supply line 11. The setting of the first one-way valve 15 can prevent the second hydraulic pump 13 from being subjected to a large back pressure, and can enable the second hydraulic pump 13 to start at a lower pressure or even zero pressure, thereby protecting the second hydraulic pump 13.

[0048] In addition, in some embodiments, a first relief valve 17 is connected to the oil line connecting the second hydraulic pump 13 and the relay tank 20. Here, the first relief valve 17 serves as a safety valve. Specifically, a first relief oil line 16 can be provided. One end of the first relief oil line 16 is connected to the oil line between the second hydraulic pump 13 and the relay tank 20, and the other end of the first relief oil line 16 is connected to the hydraulic station tank 10. The first relief valve 17 is provided on the first relief oil line 16. When the pressure in the first oil supply line 11 supplying oil to the relay tank 20 reaches the pressure of the first relief valve 17, some oil can be discharged into the hydraulic station tank 10 through the first relief oil line 16.

[0049] like Figures 1 to 8 As shown, in some embodiments, the relay oil supply system further includes a liquid level gauge 23, a thermometer 22, and a controller (not shown in the figure). The liquid level gauge 23, the thermometer 22, and the second hydraulic pump 13 are respectively in communication with the controller. The liquid level gauge 23 is used to monitor the oil level in the relay oil tank 20 and feed back the oil level signal to the controller; the thermometer 22 is used to monitor the oil temperature in the relay oil tank 20 and feed back the temperature signal to the controller. The controller is used to control the operation of the second hydraulic pump 13 based on the oil level signal fed back by the liquid level gauge 23 and the oil temperature signal fed back by the thermometer 22.

[0050] In the above embodiment, when the liquid level gauge 23 detects that the oil in the relay tank 20 is lower than the preset oil filling height, the liquid level gauge 23 can feed back the oil height signal in the relay tank 20 to the controller, and the controller controls the second hydraulic pump 13 to transfer oil from the hydraulic station tank 10 to the relay tank 20. When the liquid level gauge 23 detects that the oil in the relay tank 20 reaches the preset working oil height, the controller controls the second hydraulic pump 13 to stop operating.

[0051] In addition, when the oil temperature in the relay tank 20 is higher than the preset temperature, the thermometer 22 will feed back the monitored oil temperature signal to the controller, and the controller will control the second hydraulic pump 13 to work to pump the oil in the hydraulic station tank 10 into the relay tank 20. When the oil in the relay tank 20 reaches the overflow port set on the side wall of the relay tank 20, the oil in the relay tank 20 will overflow back to the hydraulic station tank 10 through the first return oil line 12, forming an oil circulation to cool the oil in the relay tank 20. When the thermometer 22 detects that the oil in the relay tank 20 is lower than the preset temperature, the thermometer 22 will feed back the oil temperature signal to the controller, and the controller will control the second hydraulic pump 13 to stop working.

[0052] like Figures 1 to 8 As shown, in some embodiments, a breathing valve 21 may be provided in the relay tank 20 to maintain the air pressure balance in the relay tank 20 .

[0053] In some embodiments, the second hydraulic pump 13 may be configured as a hydraulic pump driven by a motor, and the controller may control the start and stop of the motor to start or stop the second hydraulic pump 13 .

[0054] In addition, the relay oil supply system may further include a hydraulic motor 14 , which is drivingly connected to the second hydraulic pump 13 so that the hydraulic motor 14 drives the second hydraulic pump 13 .

[0055] In some embodiments, the hydraulic motor 14 can be driven in any suitable manner. For example, the first hydraulic pump 30 can be configured as a tandem hydraulic pump 300. The main pump 31 of the tandem hydraulic pump 300 is connected to the hydraulic actuator 40 and is used to pump oil from the relay tank 20 to the hydraulic actuator 40. The auxiliary pump 32 of the tandem hydraulic pump 300 is connected to the hydraulic motor 14 and is used to supply oil to the hydraulic motor 14. The first hydraulic pump 30, which supplies oil to the hydraulic actuator 40, is configured as a tandem hydraulic pump 300. This provides oil to the hydraulic motor 14, eliminating the need for a separate motor to drive the second hydraulic pump 13, thus saving costs. The tandem hydraulic pump 300 can be driven by an engine, thereby enabling the second hydraulic pump 13 to be driven even without power. Both the main pump 31 and the auxiliary pump 32 of the first hydraulic pump 30 are supplied with oil through the relay tank 20. The first hydraulic pump 30 can be driven by a drive device such as an engine block or an electric motor, without limitation.

[0056] In other embodiments, the relay oil supply system includes a third hydraulic pump 43, which is connected to the hydraulic motor 14. The third hydraulic pump 43 is used to pump oil to the hydraulic motor 14 to drive the hydraulic motor 14 to work, so that the hydraulic motor 14 drives the second hydraulic pump 13. The third hydraulic pump 43 can supply oil through the relay oil tank 20. The third hydraulic pump 43 can be driven by a driving device such as an engine group and a motor, and there is no restriction here.

[0057] In other embodiments, the hydraulic motor 14 is connected to the first hydraulic pump 30, and the first hydraulic pump 30 is used to supply oil to the hydraulic motor so that the hydraulic motor 14 drives the hydraulic pump. A switch valve 44 is provided on the oil circuit connecting the hydraulic motor 14 and the first hydraulic pump 30 to control the on-off of the oil circuit between the hydraulic motor 14 and the first hydraulic pump 30. Figure 7 and Figure 8As shown, the first hydraulic pump 30 can be used to supply oil to the hydraulic actuator 40 and to supply oil to the hydraulic motor 14. The oil inlet of the switch valve 44 is connected to the oil circuit between the first hydraulic pump 30 and the first hydraulic circuit 42. The setting of the switch valve 44 can selectively control whether the first hydraulic pump 30 supplies oil to the hydraulic motor 14. When it is necessary to supply oil to the hydraulic motor 14 through the first hydraulic pump 30, the switch valve 44 is opened, and the first hydraulic pump 30 supplies oil to the hydraulic motor 14 through the first auxiliary oil circuit; when it is not necessary to supply oil to the hydraulic motor 14, the switch valve 44 can be closed. The switch valve 44 can be constructed arbitrarily. For example, the switch valve 44 can be constructed as a ball valve, a stop valve, etc., which is not limited here.

[0058] In some embodiments, the relay oil supply system further includes a first reversing valve 24, the working oil port of the first reversing valve 24 is connected to the hydraulic motor 14 and the relay oil tank 20 respectively. When the hydraulic motor 14 is driven in different ways, the oil inlet of the first reversing valve 24 is connected to different devices. For example, Figures 1 to 3 When the first hydraulic pump 30 is constructed as a double hydraulic pump 300 and the hydraulic motor 14 is driven by the auxiliary pump 32 of the double hydraulic pump 300, the oil inlet of the first reversing valve 24 is connected to the auxiliary pump 32 of the double hydraulic pump 300; Figures 4 to 6 As shown, when the relay oil supply system includes a third hydraulic pump 43 and the third hydraulic pump 43 is used to drive the hydraulic motor 14, the oil inlet of the first reversing valve 24 is connected to the third hydraulic pump 43. The following description first assumes that the oil inlet of the first reversing valve 24 is connected to the auxiliary pump 32 of the duplex hydraulic pump 300.

[0059] like Figures 1 to 3 As shown, the oil inlet of the first reversing valve 24 is connected to the auxiliary pump 32 of the double hydraulic pump 300, and the working oil port of the first reversing valve 24 is respectively connected to the hydraulic motor 14 and the relay tank 20. The first reversing valve 24 is configured to allow the double hydraulic pump 300 to selectively pump oil to one of the hydraulic motor 14 and the relay tank 20 when in different working positions. Figure 2 As shown in the figure, the arrows indicate the flow path of the oil. The main pump 31 and the auxiliary pump 32 of the double hydraulic pump 300 can be connected to the relay tank 20 through the second oil supply line 25. The first reversing valve 24 and the auxiliary pump 32 of the double hydraulic pump 300 can be connected through the first auxiliary oil supply line 27. When the first reversing valve 24 is in the first position, the first reversing valve 24 is connected to the hydraulic motor 14, and the auxiliary pump 32 of the double hydraulic pump 300 pumps oil to the hydraulic motor 14 through the first auxiliary oil supply line 27 and the first reversing valve 24 to drive the hydraulic motor 14 to rotate, thereby driving the second hydraulic pump 13 to work. Figure 3As shown in the figure, the arrows indicate the oil flow path. When the first reversing valve 24 is in the second position, the first reversing valve 24 is connected to the relay tank 20, and the oil pumped by the auxiliary pump 32 of the double hydraulic pump 300 can enter the relay tank 20 through the first auxiliary oil supply line 27 and the first reversing valve 24. Therefore, when the main pump 31 of the double hydraulic pump 300 pumps oil to the hydraulic actuator 40 and the second hydraulic pump 13 does not need to work, the first reversing valve 24 can be placed in the second position to deliver the oil pumped by the double hydraulic pump 300 to the relay tank 20.

[0060] It should be understood that the working oil port of the first reversing valve 24 may also be connected to the hydraulic motor 14 and other oil tanks respectively, which is not limited here.

[0061] In some embodiments, when the auxiliary pump 32 of the tandem hydraulic pump 300 pumps oil to the hydraulic motor 14 through the first auxiliary oil supply line 27 and the first reversing valve 24 to drive the hydraulic motor 14 to rotate, thereby driving the second hydraulic pump 13 to operate, the controller is used to control the operation of the second hydraulic pump 13 based on the oil height signal fed back by the liquid level gauge 23 and the oil temperature signal fed back by the thermometer 22. Specifically, the first reversing valve 24 and the tandem hydraulic pump 300 are respectively connected to the controller for communication, and the tandem hydraulic pump 300 and the first reversing valve 24 can be controlled based on the oil height signal fed back by the liquid level gauge 23 and the oil temperature signal fed back by the thermometer 22.

[0062] When the liquid level gauge 23 detects that the oil in the relay tank 20 is lower than the preset oil replenishment height, the liquid level gauge 23 can feed back the oil level signal in the relay tank 20 to the controller, and the controller controls the double hydraulic pump 300 to start and the first reversing valve 24 to the first position, so that the auxiliary pump 32 of the double hydraulic pump 300 pumps oil to the hydraulic motor 14, and the hydraulic motor 14 drives the second hydraulic pump 13 to work, thereby transferring oil from the hydraulic station tank 10 to the relay tank 20. When the liquid level gauge 23 detects that the oil in the relay tank 20 reaches the preset working oil height, the controller can control the first reversing valve 24 to the second position to stop supplying oil to the hydraulic motor 14, thereby stopping the second hydraulic pump 13.

[0063] When the oil temperature in the relay tank 20 is higher than the preset temperature, the thermometer 22 feeds back the monitored oil temperature signal to the controller, and the controller controls the double hydraulic pump 300 to start and the controller controls the first reversing valve 24 to be in the first position, so that the auxiliary pump 32 of the double hydraulic pump 300 pumps the oil to the hydraulic motor 14, and the hydraulic motor 14 drives the second hydraulic pump 13 to work, so as to pump the oil in the hydraulic station tank 10 to the relay tank 20. When the oil in the relay tank 20 reaches When the overflow port is set on the side wall of the relay oil tank 20, the oil in the relay oil tank 20 will overflow back to the hydraulic station oil tank 10 through the first return oil circuit 12, forming an oil circulation to cool the oil in the relay oil tank 20. When the thermometer 22 detects that the oil in the relay oil tank 20 is lower than the preset temperature, the thermometer 22 feeds back the oil temperature signal to the controller, which can control the first reversing valve 24 to be in the second position to stop supplying oil to the hydraulic motor 14, so that the second hydraulic pump 13 stops working.

[0064] In addition, when the auxiliary pump 32 of the double hydraulic pump 300 pumps the oil to the hydraulic motor 14 through the first reversing valve 24, the main pump 31 of the double hydraulic pump 300 can pump the oil to the hydraulic actuator 40, or the main pump 31 of the double hydraulic pump 300 can pump the oil to the relay tank 20. In view of the above situation, the oil outlet of the main pump 31 of the double hydraulic pump 300 can be connected to the second reversing valve 33, which belongs to the first hydraulic circuit 42. Figures 1 to 3 As shown, the return oil port of the second reversing valve 33 can be connected to the relay oil tank 20 through the second return oil line 26, and the working oil port of the second reversing valve 33 is connected to the hydraulic actuator 41 through the oil line in the first hydraulic circuit 42. When the reversing valve is in different working positions, the oil pumped by the main pump 31 of the double hydraulic pump 300 can be selectively pumped to the hydraulic actuator 41 or the relay oil tank 20. Specifically, as Figure 2 and Figure 3 As shown in FIG, when the second reversing valve 33 is in the second position, the main pump 31 of the duplex hydraulic pump 300 pumps the oil into the relay oil tank 20 through the second reversing valve 33.

[0065] It should be noted that a second check valve 34 may be provided in the oil line connecting the main pump 31 of the tandem hydraulic pump 300 and the second reversing valve 33 to allow the oil pumped by the tandem hydraulic pump 300 to pass through the second check valve 34 and be pumped to the second reversing valve 33. The provision of the second check valve 34 protects the main pump 31 of the tandem hydraulic pump 300 from significant back pressure, while also enabling the main pump 31 of the tandem hydraulic pump 300 to start at a relatively low pressure, or even zero pressure. A third check valve 35 may also be provided in the oil line connecting the auxiliary pump 32 of the tandem hydraulic pump 300 and the first reversing valve 24, i.e., in the first auxiliary oil supply line 27. The third check valve 35 allows the oil pumped by the tandem hydraulic pump 300 to pass through the third check valve 35 and be delivered to the first reversing valve 24. The setting of the third one-way valve 35 can prevent the auxiliary pump 32 of the double hydraulic pump 300 from being subjected to a large back pressure, protect the auxiliary pump 32 of the double hydraulic pump 300, and at the same time enable the auxiliary pump 32 of the double hydraulic pump 300 to start at a lower pressure or even zero pressure.

[0066] In some embodiments, as Figures 1 to 3 As shown, a third relief valve 29 is connected to the oil circuit connecting the auxiliary pump 32 of the duplex hydraulic pump 300 and the first reversing valve 24. The third relief valve 29 serves as a safety valve. When the oil pressure in the oil circuit connecting the auxiliary pump 32 of the duplex hydraulic pump 300 and the first reversing valve 24 reaches the pressure set by the third relief valve 29, the third relief valve 29 partially drains the oil in the circuit to reduce the oil pressure. Specifically, the oil outlet of the third relief valve 29 is connected to the second oil return line 26, so that the oil passing through the third relief valve 29 can flow back to the relay tank 20 through the second oil return line 26.

[0067] In addition, a second overflow valve 28 is connected to the oil circuit connecting the main pump 31 of the dual hydraulic pump 300 and the hydraulic actuator structure 40. The second overflow valve 28 here is used as a safety valve. When the pressure in the oil circuit connecting the main pump 31 of the dual hydraulic pump 300 and the hydraulic actuator structure 40 reaches the preset pressure of the second overflow valve 28, the second overflow valve 28 can drain part of the oil in the oil circuit to reduce the oil pressure in the oil circuit. Specifically, the oil outlet of the second overflow valve 28 can be connected to the second return oil circuit 26 so that the oil passing through the second overflow valve 28 can also be drained into the relay tank 20 through the second return oil circuit 26.

[0068] like Figures 4 to 6As shown, in some embodiments, when the relay oil supply system includes a third hydraulic pump 43 and the third hydraulic pump 43 is used to drive the hydraulic motor 14, the oil inlet of the first reversing valve 24 is connected to the third hydraulic pump 43, and the working oil port of the first reversing valve 24 is respectively connected to the hydraulic motor 14 and the relay oil tank 20. The first reversing valve 24 is configured to allow the third hydraulic pump 43 to selectively pump oil to one of the hydraulic motor 14 and the relay oil tank 20 when in different working positions. Figure 5 As shown in the figure, the arrows indicate the flow path of the oil. The third hydraulic pump 43 can be connected to the relay tank 20 through the second oil supply line 25, and the first reversing valve 24 and the third hydraulic pump 43 can be connected through the first auxiliary oil supply line 27. When the first reversing valve 24 is in the first position, the third hydraulic pump 43 is connected to the hydraulic motor 14 through the first reversing valve 24. The third hydraulic pump 43 pumps oil to the hydraulic motor 14 through the first auxiliary oil supply line 27 and the first reversing valve 24 to drive the hydraulic motor 14 to rotate, and then the hydraulic motor 14 drives the second hydraulic pump 13 to work. Figure 6 As shown, the arrow in the figure indicates the oil flow path. When the first reversing valve 24 is in the second position, the first reversing valve 24 is connected to the relay tank 20, and the oil pumped by the third hydraulic pump 43 can enter the relay tank 20 through the first auxiliary oil supply circuit 27 and the first reversing valve 24.

[0069] In some embodiments, when the third hydraulic pump 43 pumps oil to the hydraulic motor 14 through the first auxiliary oil supply line 27 and the first reversing valve 24 to drive the hydraulic motor 14 to rotate, thereby causing the hydraulic motor 14 to drive the second hydraulic pump 13 to operate, the controller can be used to control the operation of the second hydraulic pump 13 based on the oil height signal fed back by the liquid level gauge 23 and the oil temperature signal fed back by the thermometer 22. Specifically, the third hydraulic pump 43 and the first reversing valve 24 are respectively connected to the controller for communication, and can control the third hydraulic pump 43 and the first reversing valve 24 based on the oil height signal fed back by the liquid level gauge 23 and the oil temperature signal fed back by the thermometer 22.

[0070] When the liquid level gauge 23 detects that the oil in the relay tank 20 is lower than the preset oil replenishment height, the liquid level gauge 23 can feed back the oil level signal in the relay tank 20 to the controller. The controller controls the third hydraulic pump 43 to start and the first reversing valve 24 to be in the first position, so that the third hydraulic pump 43 pumps oil to the hydraulic motor 14, and the hydraulic motor 14 drives the second hydraulic pump 13 to work, thereby transferring oil from the hydraulic station tank 10 to the relay tank 20. When the liquid level gauge 23 detects that the oil in the relay tank 20 reaches the preset working oil level, the controller can control the third hydraulic pump 43 to stop working and / or the first reversing valve 24 to be in the second position, so as to stop supplying oil to the hydraulic motor 14, thereby stopping the second hydraulic pump 13.

[0071] When the oil temperature in the relay tank 20 is higher than the preset temperature, the thermometer 22 feeds back the monitored oil temperature signal to the controller, and the controller controls the third hydraulic pump 43 to start and the controller controls the first reversing valve 24 to be in the first position, so that the third hydraulic pump 43 pumps the oil to the hydraulic motor 14, and the hydraulic motor 14 drives the second hydraulic pump 13 to work, so as to pump the oil in the hydraulic station tank 10 to the relay tank 20. When the oil in the relay tank 20 reaches the overflow valve provided on the side wall of the relay tank 20, the oil in the relay tank 20 is discharged. When the flow is flowing, the oil in the relay tank 20 will overflow back to the hydraulic station tank 10 through the first return oil line 12, forming an oil circulation to cool the oil in the relay tank 20. When the thermometer 22 detects that the oil in the relay tank 20 is lower than the preset temperature, the thermometer 22 feeds back the oil temperature signal to the controller, and the controller can control the third hydraulic pump 43 to stop working and / or control the first reversing valve 24 to be in the second position to stop supplying oil to the hydraulic motor 14, so that the second hydraulic pump 13 stops working.

[0072] It should be noted that the first hydraulic pump 30 supplies oil to the hydraulic actuator 41 through the first hydraulic circuit 42. Figures 4 to 6 The first hydraulic pump 30 can be connected to the second reversing valve 33 in the first hydraulic circuit 42. A second check valve 34 can be installed in the oil line connecting the first hydraulic pump 30 and the second reversing valve 33 to allow the oil pumped by the first hydraulic pump 30 to pass through the second check valve 34 and be pumped to the second reversing valve 33. The installation of the second check valve 34 protects the first hydraulic pump 30 from significant back pressure, while also enabling the first hydraulic pump 30 to start at a relatively low pressure, or even zero pressure. A third check valve 35 can also be installed in the oil line connecting the third hydraulic pump 43 and the first reversing valve 24, namely, in the first auxiliary oil supply line 27. The third check valve 35 allows the oil pumped by the third hydraulic pump 43 to pass through the third check valve 35 and be pumped to the first reversing valve 24. The installation of the third check valve 35 protects the third hydraulic pump 43 from significant back pressure, while also enabling the third hydraulic pump 43 to start at a relatively low pressure, or even zero pressure.

[0073] In some embodiments, as Figures 4 to 6As shown, a third relief valve 29 is connected to the oil circuit connecting the third hydraulic pump 43 and the first reversing valve 24. This third relief valve 29 serves as a safety valve. When the oil pressure in the oil circuit connecting the third hydraulic pump 43 and the first reversing valve 24 reaches the pressure set by the third relief valve 29, the third relief valve 29 partially drains the oil in the circuit to reduce the oil pressure. Specifically, the oil outlet of the third relief valve 29 is connected to the second oil return line 26, allowing the oil that has passed through the third relief valve 29 to flow back to the relay tank 20 via the second oil return line 26.

[0074] In addition, a second overflow valve 28 is connected to the oil circuit connecting the first hydraulic pump 30 and the hydraulic actuator structure 40. The second overflow valve 28 here is used as a safety valve. When the pressure in the oil circuit connecting the first hydraulic pump 30 and the hydraulic actuator structure 40 reaches the preset pressure of the second overflow valve 28, the second overflow valve 28 can drain part of the oil in the oil circuit to reduce the oil pressure in the oil circuit. Specifically, the oil outlet of the second overflow valve 28 can be connected to the second return oil circuit 26 so that the oil passing through the second overflow valve 28 can also be drained into the relay tank 20 through the second return oil circuit 26.

[0075] like Figures 7 and 8 As shown, in some embodiments, when the first hydraulic pump 30 is a single pump, the first hydraulic pump 30 can be used to supply oil to the hydraulic actuator 40 and to supply oil to the hydraulic motor 14. A switch valve 44 is provided on the oil line connecting the hydraulic motor 14 and the first hydraulic pump 30.

[0076] The oil inlet of the on-off valve 44 is connected to the oil circuit between the first hydraulic pump 30 and the first hydraulic circuit 42. The on-off valve 44 controls whether the first hydraulic pump 30 supplies oil to the hydraulic motor 14. When the first hydraulic pump 30 is required to supply oil to the hydraulic motor 14, the on-off valve 44 opens, and the first hydraulic pump 30 supplies oil to the hydraulic motor 14 through the first auxiliary oil circuit. When oil supply to the hydraulic motor 14 is not required, the on-off valve 44 closes.

[0077] like Figure 8 As shown in the figure, the arrows indicate the flow path of the oil. The on-off valve 44 and the hydraulic motor 14 can be connected through the first auxiliary oil supply line 27. When the on-off valve is in the open state, the first hydraulic pump 30 is connected to the hydraulic motor 14 through the on-off valve 44 and the first auxiliary oil supply line 27. The first hydraulic pump 30 pumps oil to the hydraulic motor 14 through the on-off valve 44 and the first auxiliary oil supply line 27, driving the hydraulic motor 14 to rotate, thereby causing the hydraulic motor 14 to drive the second hydraulic pump 13 to operate.

[0078] In some embodiments, when the first hydraulic pump 30 pumps oil to the hydraulic motor 14 through the on-off valve 44 and the first auxiliary oil supply line 27 to drive the hydraulic motor 14 to rotate, thereby causing the hydraulic motor 14 to drive the second hydraulic pump 13 to operate, the controller can be used to control the operation of the second hydraulic pump 13 based on the oil height signal fed back by the liquid level meter 23 and the oil temperature signal fed back by the thermometer 22. Specifically, the first hydraulic pump 30 and the on-off valve 44 are respectively connected to the controller for communication, and can control the first hydraulic pump 30 and the on-off valve 44 based on the oil height signal fed back by the liquid level meter 23 and the oil temperature signal fed back by the thermometer 22.

[0079] When the liquid level gauge 23 detects that the oil in the relay tank 20 is lower than the preset oil replenishment height, the liquid level gauge 23 can feed back the oil level signal in the relay tank 20 to the controller, and the controller controls the first hydraulic pump 30 to start and the switch valve 44 to be in the open state, so that the first hydraulic pump 30 pumps the oil to the hydraulic motor 14, and the hydraulic motor 14 drives the second hydraulic pump 13 to work, thereby transferring the oil from the hydraulic station tank 10 to the relay tank 20. When the liquid level gauge 23 detects that the oil in the relay tank 20 reaches the preset working oil level, the controller can control the switch valve 44 to close, thereby stopping the oil supply to the hydraulic motor 14, thereby stopping the second hydraulic pump 13.

[0080] When the oil temperature in the relay tank 20 is higher than the preset temperature, the thermometer 22 will feed back the monitored oil temperature signal to the controller, and the controller controls the first hydraulic pump 30 to start and the controller controls the switch valve 44 to be in an open state, so that the first hydraulic pump 30 pumps the oil to the hydraulic motor 14, and the hydraulic motor 14 drives the second hydraulic pump 13 to work to pump the oil in the hydraulic station tank 10 into the relay tank 20. When the oil in the relay tank 20 reaches the overflow port set on the side wall of the relay tank 20, the oil in the relay tank 20 will overflow back to the hydraulic station tank 10 through the first return oil line 12, forming an oil circulation to cool the oil in the relay tank 20. When the thermometer 22 detects that the oil in the relay tank 20 is lower than the preset temperature, the thermometer 22 feeds back the oil temperature signal to the controller, and the controller can control the switch valve 44 to close to stop supplying oil to the hydraulic motor 14, so that the second hydraulic pump 13 stops working.

[0081] In some embodiments, as Figure 7 and Figure 8As shown, a third relief valve 29 is connected to the oil circuit connecting the on-off valve 44 and the hydraulic motor 14. This third relief valve 29 serves as a safety valve. When the oil pressure in the oil circuit connecting the on-off valve 44 and the hydraulic motor 14 reaches the pressure set by the third relief valve 29, the third relief valve 29 partially drains the oil in the circuit to reduce the oil pressure. Specifically, the oil outlet of the third relief valve 29 is connected to the second oil return line 26, allowing the oil that has passed through the third relief valve 29 to flow back to the relay tank 20 via the second oil return line 26.

[0082] In addition, a second overflow valve 28 is connected to the oil circuit connecting the first hydraulic pump 30 and the hydraulic actuator structure 40. The second overflow valve 28 here is used as a safety valve. When the pressure in the oil circuit connecting the first hydraulic pump 30 and the hydraulic actuator structure 40 reaches the preset pressure of the second overflow valve 28, the second overflow valve 28 can drain part of the oil in the oil circuit to reduce the oil pressure in the oil circuit. Specifically, the oil outlet of the second overflow valve 28 can be connected to the second return oil circuit 26 so that the oil passing through the second overflow valve 28 can also be drained into the relay tank 20 through the second return oil circuit 26.

[0083] In some embodiments, a significant height difference between the hydraulic actuator structure 40 and the hydraulic station tank 10 can also result in a longer pipeline between the hydraulic station tank 10 and the hydraulic actuator structure 40, increasing the impact of the oil, and even potentially causing the pipeline to burst during switching. Therefore, the relay tank 20 can be positioned higher than the hydraulic station tank 10. This can reduce the height difference between the hydraulic actuator structure 40 and the oil tank used to supply the hydraulic actuator structure 40. Furthermore, it can also reduce the length of the pipeline between the hydraulic actuator structure 40 and the relay tank 20 used to supply the hydraulic actuator structure 40, thereby reducing the impact of the oil in the pipeline and increasing the lifespan of various components and pipelines in the hydraulic system. For example, in some specific embodiments, the hydraulic actuator 41 (i.e., the hydraulic cylinder) used to open or close the gate in the hydraulic actuator structure 40 of a hydropower station or dam, as well as the first hydraulic circuit 42 used to control the hydraulic cylinder's operation, are typically located at a higher level than the hydraulic station tank 10, resulting in a significant height difference between the hydraulic actuator structure 40 and the hydraulic station tank 10. The relay oil tank 20 may be arranged at a higher height than the hydraulic station oil tank 10 to reduce the height difference between the hydraulic execution structure 40 and the hydraulic station oil tank 10 .

[0084] In some embodiments, the volume of the relay oil tank 20 can be smaller than that of the hydraulic station oil tank 10. This allows the relay oil tank 20 to be smaller than the volume of the hydraulic station oil tank 10. When space near the hydraulic actuator 40 is limited and a larger oil tank like the hydraulic station oil tank 10 cannot be placed, the relay oil tank 20, which is smaller than the hydraulic station oil tank 10, can be placed near the hydraulic actuator 40. For example, when a relay oil supply system is used in a dam or hydropower station, the space around the hydraulic actuator 41 (i.e., hydraulic cylinder) used to open or close the gate in the hydraulic actuator 40 of the sluice gate, as well as the first hydraulic circuit 42 used to control the hydraulic cylinder's movement, is typically small and limited. Since the hydraulic station oil tank 10 cannot be placed near the hydraulic actuator 40 of the sluice gate, the relay oil tank 20, which has a smaller volume than the hydraulic station oil tank 10, can be placed near the hydraulic actuator 40 of the sluice gate to ensure oil supply to the hydraulic actuator 40. The hydraulic station oil tank 10 can supply oil to the relay oil tank 20 to ensure that the oil in the relay oil tank 20 is sufficient.

[0085] In the second aspect of the present disclosure, a gate device is provided, including a gate, a hydraulic actuator structure 40 of the gate, and a relay oil supply system provided in the first aspect of the present disclosure. The hydraulic actuator structure 40 of the gate includes a hydraulic cylinder for driving the gate movement and a first hydraulic circuit 42 for controlling the movement of the hydraulic cylinder. The relay oil supply system is connected to the first hydraulic circuit 42 and is used to supply oil to the first hydraulic circuit 42 to drive the hydraulic cylinder movement.

[0086] In the above embodiment, the first hydraulic circuit of the gate includes a second reversing valve 33, the oil inlet of the second reversing valve 33 is connected to the first hydraulic pump 30, the oil return port of the second reversing valve 33 is connected to the relay oil tank 20, and the working oil port of the second reversing valve 33 is connected to the gate's execution structure, that is, the hydraulic cylinder, through the oil circuit in the first hydraulic circuit of the gate. The oil pumped by the first hydraulic pump 30 passes through the second reversing valve 33 and other oil circuits in the first hydraulic circuit of the gate to complete the oil supply and return to the gate hydraulic actuator, that is, the hydraulic cylinder.

[0087] A gate device can be a gate device for a hydropower station or dam. When supplying oil to the hydraulic actuator 40 in the gate device, the distance between the hydraulic station oil tank 10 and the hydraulic actuator 40 is typically long, and the pipeline is long. Adding a relay tank 20 between the hydraulic station oil tank 10 and the hydraulic actuator 40 can reduce the length of the intermediate pipeline between the oil tank and the hydraulic actuator 40, improving the operating efficiency of the hydraulic system. This reduced intermediate pipeline length can also reduce hydraulic switching shock and extend the life of the hydraulic system.

[0088] In addition, the hydraulic station oil tank 10 can provide oil to the relay oil tank 20 to ensure that there is enough oil in the relay oil tank 20 to provide to the hydraulic actuator 40 of the gate device.

[0089] like Figures 1 to 8 As shown, the first hydraulic circuit 42 and the hydraulic actuator 41 are connected via the A1 oil circuit and the T oil circuit, respectively, to enable the first hydraulic circuit 42 to control the hydraulic actuator 41. When the hydraulic actuator 41 is configured as a hydraulic cylinder (not shown) that controls the opening and closing of a gate, the A1 oil circuit can connect to the rodless chamber of the hydraulic cylinder, and the T oil circuit can connect to the rod chamber of the hydraulic cylinder. This is a conventional oil circuit connection method and will not be described in detail here.

[0090] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0091] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0092] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A relay oil supply system, characterized in that: include: Hydraulic station oil tank, used to store oil; a relay oil tank, connected to the hydraulic station oil tank, and the hydraulic station oil tank is capable of supplying oil to the relay oil tank; as well as A first hydraulic pump has one end connected to the relay oil tank and the other end used to communicate with the hydraulic execution structure. The first hydraulic pump is used to transport the oil in the relay oil tank to the hydraulic execution structure.

2. The relay oil supply system according to claim 1, characterized in that: The hydraulic station oil tank and the relay oil tank are connected via a first oil supply oil circuit and a first oil return oil circuit; A second hydraulic pump is provided on the first oil supply line for supplying hydraulic oil to the relay tank; The first oil return circuit is used to transport part of the oil in the relay tank back to the hydraulic station tank when the oil in the relay tank reaches a preset height.

3. The relay oil supply system according to claim 2, characterized in that: The overflow port on the relay tank that is in communication with the first oil return line is located at a higher height than the oil return port on the hydraulic station tank that is in communication with the first oil return line; and / or A first overflow valve is connected to the oil line connecting the second hydraulic pump and the relay oil tank.

4. The relay oil supply system according to claim 2, characterized in that: The relay oil supply system further includes a liquid level gauge, a thermometer, and a controller, wherein the liquid level gauge, the thermometer, and the second hydraulic pump are respectively connected to the controller for communication; The liquid level gauge is used to monitor the oil height in the relay oil tank and feed back the oil height signal to the controller. The thermometer is used to monitor the oil temperature in the relay oil tank and feed back the oil temperature signal to the controller. The controller is used to control the operation of the second hydraulic pump based on the oil height signal fed back by the liquid level gauge and the oil temperature signal fed back by the thermometer.

5. The relay oil supply system according to claim 2, characterized in that: The relay oil supply system also includes a hydraulic motor, which is driven and connected to the second hydraulic pump. The first hydraulic pump is constructed as a double hydraulic pump. The main pump of the double hydraulic pump is connected to the hydraulic execution structure. The main pump of the double hydraulic pump is used to pump the oil in the relay oil tank to the hydraulic execution structure. The auxiliary pump of the double hydraulic pump is connected to the hydraulic motor. The auxiliary pump of the double hydraulic pump is used to supply oil to the hydraulic motor so that the hydraulic motor drives the second hydraulic pump.

6. The relay oil supply system according to claim 2, characterized in that: The relay oil supply system further includes a hydraulic motor drivingly connected to the second hydraulic pump, the hydraulic motor being in communication with the first hydraulic pump, the first hydraulic pump being further configured to supply oil to the hydraulic motor so that the hydraulic motor drives the second hydraulic pump, and a switch valve being provided on the oil circuit connecting the hydraulic motor and the first hydraulic pump for controlling the on-off of the oil circuit between the hydraulic motor and the first hydraulic pump; or The relay oil supply system also includes a third hydraulic pump and a hydraulic motor drivingly connected to the second hydraulic pump. The third hydraulic pump is in communication with the hydraulic motor and is used to pump oil to the hydraulic motor so that the hydraulic motor drives the second hydraulic pump.

7. The relay oil supply system according to claim 5, characterized in that: The relay oil supply system also includes a first reversing valve, the oil inlet of the first reversing valve is connected to the auxiliary pump of the double hydraulic pump, the working oil port of the first reversing valve is connected to the hydraulic motor and the relay oil tank respectively, and the first reversing valve is constructed to allow the double hydraulic pump to selectively pump oil to one of the hydraulic motor and the relay oil tank when in different working positions.

8. The relay oil supply system according to claim 6, characterized in that: The relay oil supply system also includes a first reversing valve, the oil inlet of the first reversing valve is connected to the third hydraulic pump, the working oil port of the first reversing valve is connected to the hydraulic motor and the relay oil tank respectively, and the first reversing valve is constructed to allow the third hydraulic pump to selectively pump oil to one of the hydraulic motor and the relay oil tank when in different working positions.

9. The relay oil supply system according to any one of claims 1 to 8, characterized in that: The relay oil tank is located at a higher level than the hydraulic station oil tank; and / or The volume of the relay oil tank is smaller than the volume of the hydraulic station oil tank.

10. A gate device, characterized in that: It includes a gate, a hydraulic execution structure of the gate and a relay oil supply system as described in any one of claims 1 to 9, the hydraulic execution structure of the gate includes a hydraulic cylinder for driving the gate to move and a first hydraulic circuit for controlling the movement of the hydraulic cylinder, and the relay oil supply system is connected to the first hydraulic circuit and is used to supply oil to the first hydraulic circuit to drive the hydraulic cylinder to move.

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