Gate group of hydropower station

Abstract

The utility model relates to a gate group of a hydropower station. The gate group comprises an emergency operation hydraulic system, at least two gates and at least two hoists. The at least two hoists are connected with the at least two gates in a one-to-one correspondence mode so as to be used for driving the gates to ascend and descend. The emergency operation hydraulic system comprises a power unit and at least two emergency operation units, the power unit comprises a hydraulic pump, the at least two emergency operation units and the at least two hoists are arranged in a one-to-one correspondence mode, and hydraulic motors of the at least two emergency operation units communicate with the hydraulic pump so as to drive the corresponding hoists through the hydraulic motors. A motor of the hoist drives the hoist through a hydraulic motor under the condition of no power. The hydraulic motors of the at least two emergency operation units communicate with the hydraulic pump, so that the multiple hydraulic motors can be driven through the same hydraulic pump, namely, the multiple hoists can be driven to operate through one hydraulic pump, lifting of multiple gates is achieved, each gate does not need to use one hydraulic pump, and cost is low.

Description

Technical Field

[0001] The present disclosure relates to the technical field of gate devices, and more particularly, to a gate group for a hydropower station. Background Art

[0002] When a motor, electrical equipment, or power supply fails in a gate hoist, the hoist can be driven by a standby emergency operation hydraulic system. Usually, a hydraulic pump drives a hydraulic motor, and the hydraulic motor drives the hoist to operate to ensure the normal opening function of the gate in a power-off state and ensure the peak regulation and flood discharge of the reservoir. However, in the flood discharge channels of some large hydropower stations, the channels are very wide, and usually, a large number of gates are required. The winch-type hoists for controlling the lifting of the gates are arranged in sequence above the gates, and each hoist is driven by an independent emergency operation hydraulic system, resulting in a high cost. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a gate group, and the emergency hydraulic operation system of the gate group can drive multiple hoists to operate through one hydraulic pump, thereby driving the lifting of multiple gates, with a lower cost.

[0004] To achieve the above object, the present disclosure provides a gate group for a hydropower station, including:

[0005] At least two gates,

[0006] At least two hoists, connected to the at least two gates in a one-to-one correspondence for driving the lifting of the gates;

[0007] An emergency operation hydraulic system, including a power unit and at least two emergency operation units. The power unit includes a hydraulic pump. The at least two emergency operation units are arranged in a one-to-one correspondence with the at least two hoists. The emergency operation unit includes a hydraulic motor drivingly connected to the hoist, and the hydraulic motors of the at least two emergency operation units are each communicated with the hydraulic pump.

[0008] Optionally, the at least two hoists are spaced apart along a first direction, the at least two emergency operation units are arranged at intervals along the first direction, and the power unit is located at an intermediate position of the at least two emergency operation units along the first direction.

[0009] Optionally, the power unit further includes a power device drivingly connected to the hydraulic pump, and the power device is configured as an internal combustion engine.

[0010] Optionally, the power unit further includes a main fuel tank. The emergency operation hydraulic system further includes a main oil supply line and a main oil return line that are respectively connected to the main fuel tank. The hydraulic motor includes two working oil ports. One of the two working oil ports is connected to the main oil supply line through a first oil line, and the other is connected to the main oil return line through a second oil line. A first control valve for controlling the on / off of the first oil line is provided on the first oil line, and a second control valve for controlling the on / off of the second oil line is provided on the second oil line. The hydraulic pump is provided on the main oil supply line.

[0011] Optionally, the emergency operation unit further includes an emergency operation fuel tank. The hydraulic motor is a bidirectional hydraulic motor. One of the two working oil ports of the bidirectional hydraulic motor is connected to the emergency operation fuel tank through a third oil line, and the other is connected to the emergency operation fuel tank through a fourth oil line. A first one-way valve is provided on the third oil line for allowing the oil in the emergency operation fuel tank to enter the bidirectional hydraulic motor through the third oil line, and a second one-way valve is provided on the fourth oil line for allowing the oil in the emergency operation fuel tank to enter the bidirectional hydraulic motor through the fourth oil line;

[0012] The emergency operation unit further includes a first oil return line. The third oil line and the fourth oil line are both connected to the first oil return line, so that the oil output by the bidirectional hydraulic motor can flow to the emergency operation fuel tank through the first oil return line. A third control valve for controlling its on / off is provided on the first oil return line.

[0013] Optionally, a flow valve is provided on the first oil return line for adjusting the flow rate of the oil flowing to the emergency operation fuel tank through the first oil return line.

[0014] Optionally, the first oil line is connected between the first one-way valve on the third oil line and the bidirectional hydraulic motor, and the second oil line is connected between the second one-way valve on the fourth oil line and the bidirectional hydraulic motor;

[0015] The emergency operation unit further includes a connecting oil circuit. One end of the connecting oil circuit is connected between the first control valve on the first oil circuit and the connection of the third oil circuit. The other end of the connecting oil circuit is connected between the second control valve on the second oil circuit and the connection of the fourth oil circuit. The first oil return circuit is communicated with the connecting oil circuit. A third one-way valve for allowing the oil in the first oil circuit to flow through the connecting oil circuit to the first oil return circuit is arranged between the connection of the first oil return circuit on the connecting oil circuit and the connection of the first oil circuit. A fourth one-way valve for allowing the oil in the second oil circuit to flow through the connecting oil circuit to the first oil return circuit is arranged between the connection of the first oil return circuit on the connecting oil circuit and the connection of the second oil circuit.

[0016] Optionally, a first overflow oil circuit is connected to the first oil return circuit, and a first overflow valve is arranged on the first overflow oil circuit; and / or

[0017] A first pressure gauge is arranged on the first oil return circuit.

[0018] Optionally, the emergency operation unit further includes an emergency operation oil tank and a first three-way valve. The oil leakage port of the hydraulic motor is communicated with the oil inlet of the first three-way valve. One of the two oil outlets of the first three-way valve is communicated with the main oil tank, and the other is communicated with the emergency operation oil tank.

[0019] Optionally, a first oil discharge circuit is connected to the main oil delivery circuit. The end of the first oil discharge circuit far from the main oil delivery circuit is communicated with the main oil tank. A fourth control valve for controlling the on-off of the first oil discharge circuit is arranged on the first oil discharge circuit; and / or

[0020] A second pressure gauge is arranged on the main oil delivery circuit.

[0021] Through the above technical solutions, the emergency operation hydraulic system includes a power unit and at least two emergency operation units. Among them, the power unit includes a hydraulic pump. The at least two emergency operation units and the at least two hoisting machines are arranged in one-to-one correspondence. The emergency operation unit includes a hydraulic motor drivingly connected to the hoisting machine. The hydraulic motor can drive the hoisting machine to operate when the hoisting machine is powered off, so as to drive the gate to rise. The hydraulic motors of at least two emergency operation units are respectively communicated with the hydraulic pump, so as to be able to drive a plurality of hydraulic motors through the hydraulic pump, and further drive a plurality of hoisting machines to operate through one hydraulic pump, so as to realize the rising of a plurality of gates, and the cost is relatively low.

[0022] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0023] The accompanying drawings are used to provide a further understanding of the present disclosure and form a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the accompanying drawings:

[0024] Figure 1 It is the working principle diagram of the emergency operation system of the gate group of the hydropower station provided in the exemplary embodiment of the present disclosure;

[0025] Figure 2 It is the emergency operation system diagram of the gate group of the hydropower station provided in the exemplary embodiment of the present disclosure, wherein the power unit is located in the middle of a plurality of emergency operation units;

[0026] Figure 3 It is the emergency operation system diagram of the gate group of the hydropower station provided in the exemplary embodiment of the present disclosure, wherein the oil flow path when the hydraulic pump just starts is shown in the figure;

[0027] Figure 4 It is the emergency operation system diagram of the gate group of the hydropower station provided in the exemplary embodiment of the present disclosure, wherein the oil flow path when the hydraulic pump drives the bidirectional hydraulic motor in one of the emergency operation units to operate is shown in the figure;

[0028] Figure 5 It is the emergency operation system diagram of the gate group of the hydropower station provided in the exemplary embodiment of the present disclosure, wherein the oil flow path when the hydraulic motor in one of the emergency operation units follows the hoist when the gate is rising in the powered state is shown in the figure;

[0029] Figure 6 It is the emergency operation system diagram of the gate group of the hydropower station provided in the exemplary embodiment of the present disclosure, wherein the oil flow path when the hydraulic motor in one of the emergency operation units follows the hoist when the gate is descending is shown in the figure.

[0030] Explanation of reference numerals

[0031] 100 - Power unit; 101 - Hydraulic pump; 102 - Power device; 1020 - Internal combustion engine; 103 - Main fuel tank; 200 - Emergency operation unit; 200a - First valve block; 201 - Hydraulic motor; 2010 - Bidirectional hydraulic motor; 202 - First oil circuit; 203 - Second oil circuit; 204 - First control valve; 205 - Second control valve; 206 - Third oil circuit; 207 - Fourth oil circuit; 208 - First check valve; 209 - Second check valve; 210 - First oil return circuit; 211 - Third control valve; 212 - Flow valve; 2120 - One - way throttle valve; 213 - Connecting oil circuit; 214 - Third check valve; 215 - Fourth check valve; 216 - First overflow oil circuit; 217 - First relief valve; 218 - First pressure gauge; 219 - First three - way valve; 220 - Emergency operation fuel tank; 221 - First oil leakage circuit; 222 - Second oil leakage circuit; 300 - Main oil delivery circuit; 400 - Main oil return circuit; 500 - First oil discharge circuit; 600 - Fourth control valve; 700 - Second pressure gauge; 800 - Second overflow oil circuit; 900 - Second relief valve; 1000 - Fifth check valve; 2000 - Main oil leakage return circuit; 3000 - Second valve block. Detailed implementation manners

[0032] The following will describe in detail the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for the purpose of illustration and explanation of the present disclosure, and are not used to limit the present disclosure.

[0033] In the present disclosure, unless otherwise stated, the directional terms such as "inside, outside" refer to the inside and outside of the contour of the component or structure itself. "First, second" etc. are used to distinguish one element from another, and do not have sequentiality and importance.

[0034] The present disclosure provides a gate group for a hydropower station, including an emergency operation hydraulic system, at least two gates (not shown in the figure) and at least two hoists (not shown in the figure). Among them, at least two hoists are connected to at least two gates in one - to - one correspondence for driving the lifting of the gates. As Figures 1 to 6As shown in the figure, the emergency operation hydraulic system includes a power unit 100 and at least two emergency operation units 200. The power unit 100 includes a hydraulic pump 101. At least two emergency operation units 200 and at least two hoists are arranged in one-to-one correspondence. The hydraulic motors 201 of each of the at least two emergency operation units 200 are all connected to the hydraulic pump 101 to drive the corresponding hoist through the hydraulic motor 201, so that the hoist can be driven by the hydraulic motor 201 when the motor of the hoist is powered off. The hydraulic motors 201 of each of the at least two emergency operation units 200 are all connected to the hydraulic pump 101, so that multiple hydraulic motors 201 can be driven by the same hydraulic pump 101, that is, multiple hoists can be driven by one hydraulic pump 101 to realize the lifting of multiple gates, without the need for each gate to use a hydraulic pump 101, and the cost is relatively low.

[0035] In addition, the space beside the hoist of the hydropower station is usually small. If a hydraulic pump 101 is arranged beside each hoist, the space is relatively cramped and it is not easy to arrange. However, by driving multiple hoists with the same hydraulic pump 101, the hydraulic pump 101 can be arranged in a position with more abundant space, which is convenient for the arrangement of the hydraulic pump 101.

[0036] It should be noted that in the above-mentioned embodiments, the hoist can be a winch-type hoist. The hydraulic motor 201 can be connected to the high-speed shaft of the reducer of the hoist through a coupling, or the hydraulic motor 201 can be connected to the standby shaft of the double-output shaft motor of the hoist through a coupling, and there is no limitation here.

[0037] In practical applications, there are at least two gates in the hydropower station, and at least two gates are arranged at intervals along one direction. It can be defined that at least two gates in the hydropower station are arranged at intervals along the first direction. Each gate corresponds to a hoist. Therefore, as Figures 2 to 6 shown, at least two hoists can be arranged at intervals along the first direction, and at least two emergency operation units 200 arranged in one-to-one correspondence with at least two hoists are arranged at intervals along the first direction. The power unit 100 is located at the middle position of at least two emergency operation units 200 along the first direction, so that the distance for the power unit 100 to deliver oil to each emergency operation unit 200 is shorter, the speed for the power unit 100 to deliver oil to each emergency operation unit 200 is faster, and thus the working efficiency of the emergency operation hydraulic system is higher.

[0038] In some embodiments, the power unit 100 further includes a power device 102 drivingly connected to the hydraulic pump 101, and the power device 102 can be arbitrarily configured according to actual needs. For example, the power device 102 can be configured as an internal combustion engine 1020, which can drive the hydraulic pump 101 in a power-off scenario to meet the need for power-off driving of the hydraulic pump 101.

[0039] In some embodiments, the power unit 100 further includes a main fuel tank 103. The emergency operation hydraulic system further includes a main oil supply line 300 and a main oil return line 400 that are respectively connected to the main fuel tank 103. The hydraulic motor 201 includes two working oil ports. One of the two working oil ports is connected to the main oil supply line 300 through a first oil line 202, and the other is connected to the main oil return line 400 through a second oil line 203. A first control valve 204 for controlling the on / off of the first oil line 202 is provided on the first oil line 202, and a second control valve 205 for controlling the on / off of the second oil line 203 is provided on the second oil line 203. The hydraulic pump 101 is arranged on the main oil supply line 300.

[0040] In the above embodiments, the arrangements of the main oil supply line 300 and the main oil return line 400 facilitate the hydraulic pump 101 to pump the oil in the main fuel tank 103 into the hydraulic motor 201 in each emergency operation unit 200. The first control valve 204 provided on the first oil line 202 connecting the hydraulic motor 201 and the main oil supply line 300 can be used to control the on / off of the first oil line 202, so as to control the on / off of the main oil supply line 300 and the working oil port of the hydraulic motor 201, and further control the on / off of the oil flowing from the main oil supply line 300 into the hydraulic motor 201 through the first oil line 202. The second control valve 205 provided on the second oil line 203 connecting the hydraulic motor 201 and the main oil return line 400 can be used to control the on / off of the second oil line 203, so as to control the on / off of the main oil return line 400 and the working oil port of the hydraulic motor 201, and further control the on / off of the oil flowing from the hydraulic motor 201 to the main oil return line 400 through the second oil line 203.

[0041] It should be noted that the first control valve 204 and the second control valve 205 can adopt any suitable valves according to actual needs. For example, both the first control valve 204 and the second control valve 205 can adopt ball valves or globe valves, and no limitation is made here.

[0042] In addition, both the first control valve 204 and the second control valve 205 can be controlled by any one of manual control, electric control, hydraulic control, and pneumatic control, and details are not described here.

[0043] It should be understood that at least two emergency operation units 200 are included in the emergency operation hydraulic system. Each emergency operation unit 200 includes a hydraulic motor 201. Each hydraulic motor 201 is connected to the main oil supply line 300 and the main oil return line 400 through its respective corresponding first oil line 202 and second oil line 203. A first control valve 204 is provided on each first oil line 202, and a second control valve 205 is provided on each second oil line 203, which can enable the hydraulic pumps 101 in each emergency operation unit 200 to operate independently, that is, the hydraulic pumps 101 in each emergency operation unit 200 do not affect each other during operation.

[0044] In addition, as described above, the hydraulic motor 201 is drivingly connected to the hoist through a coupling. When the hoist is operating normally, the hydraulic motor 201 needs to rotate with the hoist. In order to enable the hydraulic motor 201 to rotate with the hoist, the hydraulic motor 201 can be configured as a bidirectional hydraulic motor 2010. In addition, in order to enable the bidirectional hydraulic motor 2010 to rotate smoothly, the oil lines connected to the hydraulic motor 201 can be designed. For example, the emergency operation unit 200 further includes an emergency operation oil tank 220. One of the two working oil ports of the bidirectional hydraulic motor 2010 is connected to the emergency operation oil tank 220 through a third oil line 206, and the other is connected to the emergency operation oil tank 220 through a fourth oil line 207. A first one-way valve 208 is provided on the third oil line 206 for allowing the oil in the emergency operation oil tank 220 to enter the bidirectional hydraulic motor 2010 through the third oil line 206. A second one-way valve 209 is provided on the fourth oil line 207 for allowing the oil in the emergency operation oil tank 220 to enter the bidirectional hydraulic motor 2010 through the fourth oil line 207. The emergency operation unit 200 further includes a first oil return line 210. The third oil line 206 and the fourth oil line 207 are both connected to the first oil return line 210 for enabling the oil output by the bidirectional hydraulic motor 2010 to flow to the emergency operation oil tank 220 through the first oil return line 210. A third control valve 211 for controlling its on-off is provided on the first oil return line 210. Among them, the third control valve 211 can adopt any suitable valve according to actual needs. For example, the third control valve 211 can adopt a ball valve or a globe valve, and there is no limitation here.

[0045] In addition, the third control valve 211 can be controlled by any one of manual control, electric control, hydraulic control and pneumatic control, which will not be elaborated here.

[0046] Through the above settings of the third oil line 206, the fourth oil line 207 and the first oil return line 210, the bidirectional hydraulic motor 2010 can operate with the hoist when the hoist is operating.

[0047] For example, when the hoist is operating normally, the hoist drives the hydraulic motor 201 to rotate. As Figure 6 shown, when the hoist drives the bi-directional hydraulic motor 2010 to rotate in the clockwise direction, driven by the bi-directional hydraulic motor 2010, the oil in the emergency operation oil tank 220 enters the bi-directional hydraulic motor 2010 through the fourth oil circuit 207, and then the oil flowing through the bi-directional hydraulic motor 2010 flows through the third oil circuit 206 and then enters the first oil return circuit 210, and the oil flowing into the first oil return circuit 210 flows out to the emergency operation oil tank 220 after flowing through the first oil return circuit 210.

[0048] When the hoist drives the hydraulic motor 201 to rotate in the counterclockwise direction, as Figure 5 shown, driven by the bi-directional hydraulic motor 2010, the oil in the emergency operation oil tank 220 enters the bi-directional hydraulic motor 2010 through the third oil circuit 206, and after passing through the bi-directional hydraulic motor 2010, the oil flows through the fourth oil circuit 207 and the first oil return circuit 210 connected to the fourth oil circuit 207, and then enters the emergency operation oil tank 220 after passing through the first oil return circuit 210.

[0049] In some embodiments, a flow valve 212 may be provided on the first oil return circuit 210. The flow valve 212 can be used to adjust the flow rate of the oil flowing through the first oil return circuit 210 to the emergency operation oil tank 220, so as to control the rotation speed of the bi-directional hydraulic motor 2010, and further control the rotation of the hoist, so as to achieve the purpose of controlling the lifting speed of the gate. In addition, when the motor of the hoist is in a state without power drive and the gate is falling, the flow valve 212 can be used to limit the falling speed of the gate, which will be described in detail in the following content and will not be elaborated here.

[0050] In the above embodiments, the flow valve 212 may be a one-way throttle valve 2120, that is, when the oil flows from the connection oil circuit 213 to the emergency operation unit 200, the oil flowing through the first oil return circuit 210 is throttled.

[0051] In addition, in order to streamline the oil circuit design of the emergency operation unit 200, the connection relationships among the first oil circuit 202, the second oil circuit 203, the third oil circuit 206, and the fourth oil circuit 207 connected to the bidirectional hydraulic motor 2010 can be designed. For example, the first oil circuit 202 can be connected between the first one-way valve 208 of the third oil circuit 206 and the bidirectional hydraulic motor 2010, and the second oil circuit 203 can be connected between the second one-way valve 209 of the fourth oil circuit 207 and the bidirectional hydraulic motor 2010. The emergency operation unit 200 further includes a connection oil circuit 213. One end of the connection oil circuit 213 is connected between the first control valve 204 on the first oil circuit 202 and the connection point of the third oil circuit, and the other end of the connection oil circuit 213 is connected between the second control valve 205 on the second oil circuit 203 and the connection point of the fourth oil circuit. The first oil return circuit 210 is connected to the connection oil circuit 213. A third one-way valve 214 for allowing the oil in the first oil circuit 202 to flow through the connection oil circuit 213 to the first oil return circuit 210 is provided between the connection point of the first oil return circuit 210 on the connection oil circuit 213 and the connection point of the first oil circuit 202, and a fourth one-way valve 215 for allowing the oil in the second oil circuit 203 to flow through the connection oil circuit 213 to the first oil return circuit 210 is provided between the connection point of the first oil return circuit 210 on the connection oil circuit 213 and the connection point of the second oil circuit 203.

[0052] In the above embodiment, the first oil return circuit 210 is respectively connected to the first oil circuit 202 and the second oil circuit 203 through the connection oil circuit 213, and the first oil circuit 202 and the second oil circuit 203 are respectively connected to the third oil circuit 206 and the fourth oil circuit 207. When the bidirectional hydraulic motor 2010 operates along with the hoist, the oil can enter the first oil return circuit after passing through the first oil circuit 202 or the second oil circuit 203. Such a setting enables the first oil circuit 202 and the second oil circuit 203 to be used not only for connecting the two working oil ports of the bidirectional hydraulic motor 2010 to the main oil supply circuit 300 and the main oil return circuit 400 respectively, but also for enabling the first oil return circuit 210 to be respectively connected to the third oil circuit 206 and the fourth oil circuit 207 through the first oil circuit 202 and the second oil circuit 203, thus reusing the first oil circuit 202 and the second oil circuit 203 and streamlining the structure of the system.

[0053] In this embodiment, when the bidirectional hydraulic motor 2010 operates along with the hoist, after the oil in the emergency operation fuel tank 220 enters the bidirectional hydraulic motor 2010 through the third oil circuit 206, it can then enter the emergency operation fuel tank 220 through the fourth oil circuit 207, the first oil circuit 202, the connection oil circuit 213, and the first oil return circuit 210. In addition, after the oil in the emergency operation fuel tank 220 enters the bidirectional hydraulic motor 2010 through the fourth oil circuit 207, it can then enter the emergency operation fuel tank 220 through the third oil circuit 206, the second oil circuit 203, the connection oil circuit 213, and the first oil return circuit 210.

[0054] In some embodiments, a first oil return circuit 210 is connected to a first overflow oil circuit 216. A first overflow valve 217 is provided on the first overflow oil circuit 216. The first overflow valve 217 can be used as a safety valve to prevent the oil pressure in the first oil return circuit 210 from being too high, and thus can prevent the oil pressure in the emergency operation unit 200 from being too high.

[0055] A first pressure gauge 218 is provided on the first oil return circuit 210 to monitor the pressure value of the first oil return circuit 210 in the emergency operation unit 200, so as to take timely measures when the pressure value is too high to avoid danger.

[0056] In addition, as Figures 1 to 6 shown, the emergency operation unit 200 further includes a first three-way valve 219. The oil leakage port of the hydraulic motor 201 is communicated with the oil inlet of the first three-way valve 219. One of the two oil outlets of the first three-way valve 219 is communicated with the main fuel tank 103, and the other is communicated with the emergency operation fuel tank 220. By controlling the first three-way valve 219, the oil leaked from the oil leakage port of the hydraulic motor 201 can be selectively introduced into the main fuel tank 103 or the emergency operation fuel tank 220.

[0057] Specifically, the emergency operation hydraulic system may include a main oil leakage return circuit 2000 communicated with the main fuel tank 103. One of the two oil outlets of the first three-way valve 219 can be communicated with the main oil leakage return circuit 2000 through a first oil leakage circuit 221, so that the bidirectional hydraulic motor 201 is communicated with the main fuel tank 103 through the first three-way valve 219, the first oil leakage circuit 221 and the main oil leakage return circuit 2000. The other of the two oil outlets of the first three-way valve 219 can be communicated with the emergency operation fuel tank 220 through a second oil leakage circuit 222.

[0058] When it is necessary to drive the hydraulic motor 201 through the hydraulic pump 101 and then drive the hoist to operate, the first three-way valve 219 can be controlled so that the oil leakage port of the hydraulic motor 201 communicates with the main oil tank 103, and the oil leaking from the oil leakage port of the hydraulic motor 201 can be re-introduced into the main oil tank 103. When the hydraulic motor 201 rotates with the hoist, the first three-way valve 219 can be controlled to make the oil leakage port of the hydraulic motor 201 communicate with the emergency operation oil tank 220, and the oil in the oil leakage port of the hydraulic motor 201 can be introduced into the emergency operation oil tank 220. Through the above settings, when the oil introduced into the hydraulic motor 201 is the emergency operation oil tank 220, the oil discharged from the oil leakage port of the hydraulic motor 201 can also be re-introduced into the emergency operation oil tank 220; when the oil introduced into the hydraulic motor 201 is the main oil tank 103, the oil discharged from the oil leakage port of the hydraulic motor 201 can also be re-introduced into the main oil tank 103. Moreover, the oil in the main oil tank 103 is introduced into the hydraulic motor 201 through one working oil port of the hydraulic motor 201, and then flows out from the other working oil port of the hydraulic motor 201 and is introduced into the main oil tank 103. The oil in the emergency operation oil tank 220 is introduced into the hydraulic motor 201 through one working oil port of the hydraulic motor 201, and then flows out from the other working oil port of the hydraulic motor 201 and is introduced into the emergency operation oil tank 220. Through the above settings, the amount of oil in the main oil tank 103 and the emergency operation oil tank 220 can be maintained.

[0059] In some embodiments, the emergency operation unit 200 further includes a first valve block 200a. The first control valve 204, the second control valve 205, the third control valve 211, the flow valve 212, the first relief valve 217, the third check valve 214, the fourth check valve 215, and the first three-way valve 219 in the emergency operation unit 200 can all be integrated on the first valve block 200a to reduce the use of pipelines, thereby saving space and cost, and improving work efficiency.

[0060] In some embodiments, the power unit 102 can be constructed as an internal combustion engine 1020. When the internal combustion engine 1020 drives the hydraulic pump 101 to operate, the hydraulic pump 101 needs to be started under a lower oil pressure. Therefore, the first oil discharge circuit 500 can be connected to the main oil supply circuit 300, and the end of the first oil discharge circuit 500 away from the main oil supply circuit 300 can be connected to the main oil tank 103. The first oil discharge circuit 500 is provided with a fourth control valve 600 for controlling the on and off of the first oil discharge circuit 500. When the hydraulic pump 101 is started by the internal combustion engine 1020, the fourth control valve 600 on the first oil discharge circuit 500 can be opened, so that the oil pumped out by the hydraulic pump 101 passes through the main oil supply circuit 300 and the first oil discharge circuit 500 and then enters the main oil tank 103, so as to facilitate the start of the hydraulic pump 101. When the internal combustion engine 1020 is fully started, that is, when the oil pressure output by the hydraulic pump 101 reaches a preset value, the fourth control valve 600 can be closed, so that the oil pumped out by the hydraulic pump 101 is delivered to each emergency operation unit 200 through the main oil supply circuit 300. Among them, the fourth control valve 600 can adopt any suitable valve according to actual needs. For example, the fourth control valve 600 can adopt a ball valve or a stop valve, which is not limited here.

[0061] In addition, the fourth control valve 600 can be controlled by any one of manual control, electric control, hydraulic control and pneumatic control, which will not be described in detail here.

[0062] In some embodiments, a second pressure gauge 700 may be provided on the main oil supply line 300, and the pressure of the main oil supply line 300 may be monitored by the second pressure gauge 700. When the internal combustion engine 1020 drives the hydraulic pump 101 to start, the pressure in the main oil supply line 300 may be monitored by the second pressure gauge 700. When the oil pressure in the main oil supply line 300 reaches a preset value, the fourth control valve 600 is closed, and the oil pumped by the hydraulic pump 101 is directed to each emergency operation unit 200.

[0063] In some embodiments, a fifth one-way valve 1000 may be provided on the main oil supply line 300 to allow the oil pumped by the hydraulic pump 101 to be delivered to each emergency operation unit 200 through the fifth one-way valve 1000. In addition, the connection between the first oil discharge line 500 and the main oil supply line 300 may be located on the side of the fifth one-way valve 1000 on the main oil supply line 300 away from the hydraulic pump 101, and the second pressure gauge 700 may also be provided on the side of the fifth one-way valve 1000 on the main oil supply line 300 away from the hydraulic pump 101. The fifth one-way valve 1000 can protect the hydraulic pump 101 and prevent the hydraulic pump 101 from being damaged by excessive pressure in the oil supply line.

[0064] In addition, the main oil supply oil circuit 300 is connected with a second overflow oil circuit 800, and a second overflow valve 900 is provided on the second overflow oil circuit 800. The connection point between the second overflow oil circuit 800 and the main oil supply oil circuit 300 can be located on the side of the fifth check valve 1000 away from the hydraulic pump 101. The provision of the second overflow oil circuit 800 can prevent the oil pressure in the main oil supply oil circuit 300 from being too high and causing danger.

[0065] In some embodiments, the emergency operation hydraulic system also includes a second valve block 3000, and the fifth one-way valve 1000, the second overflow valve 900 and the fourth control valve 600 can be integrated in the second valve block 3000 to reduce the use of pipelines, save space and cost, and improve work efficiency.

[0066] The various parts of the emergency operation hydraulic system of the gate group are described above. In order to describe the emergency operation hydraulic system more clearly, the emergency operation hydraulic system will now be described as a whole in conjunction with the accompanying drawings.

[0067] The emergency operation hydraulic system includes a power unit 100 and at least two emergency operation units 200. The emergency operation units 200 are multiple, and the multiple emergency operation units 200 are arranged at intervals along the first direction. The power unit 100 is arranged in the middle of the multiple emergency operation units 200. Figure 2 As shown, there are four emergency operation units 200, which are arranged at intervals along the first direction, and the power unit 100 is arranged in the middle of the four emergency operation units 200. The power unit 100 includes a main oil tank 103, a power device 102 and a hydraulic pump 101. The power device 102 can use an internal combustion engine 1020, and the internal combustion engine 1020 drives the hydraulic pump 101 to operate. The emergency operation hydraulic system also includes a main oil supply oil circuit 300 and a main oil return oil circuit 400, and the main oil supply oil circuit 300 and the main oil return oil circuit 400 are both connected to the main oil tank 103. The hydraulic pump 101 is arranged on the main oil supply oil circuit 300, and the main oil supply oil circuit 300 can be used to deliver oil to the bidirectional hydraulic motor 2010 in each emergency operation unit 200.

[0068] The main oil supply oil circuit 300 is provided with a fifth one-way valve 1000, which is used to allow the oil in the main oil tank 103 to pass through the fifth one-way valve 1000 on the main oil supply oil circuit 300 and then flow to the bidirectional hydraulic motor 2010. The provision of the fifth one-way valve 1000 can prevent the back pressure in the main oil supply oil circuit 300 from damaging the hydraulic pump 101. The main oil supply oil circuit 300 is connected with a second overflow oil circuit 800, and a second overflow valve 900 is provided on the second overflow oil circuit 800. The connection point between the second overflow oil circuit 800 and the main oil supply oil circuit 300 is located on the side of the fifth one-way valve 1000 on the main oil supply oil circuit 300 away from the hydraulic pump 101. The provision of the second overflow oil circuit 800 can prevent the oil pressure in the main oil supply oil circuit 300 from being too high and causing danger. The main oil supply oil circuit 300 is also connected to the first oil discharge oil circuit 500, and the first oil discharge oil circuit 500 is provided with a fourth control valve 600. The connection point between the first oil discharge oil circuit 500 and the main oil supply oil circuit 300 is located on the side of the fifth check valve 1000 on the main oil supply oil circuit 300 away from the hydraulic pump 101. The provision of the first oil discharge oil circuit 500 can facilitate the start of the power device 102 configured as the internal combustion engine 1020 to drive the hydraulic pump 101. When the internal combustion engine 1020 starts to drive the hydraulic pump 101 to run, the fourth control valve 600 on the first oil discharge oil circuit 500 can be opened first, so that the oil pumped by the hydraulic pump 101 is firstly transported back to the main oil tank 103 through the first oil discharge oil circuit 500, so that the hydraulic pump 101 can be started at a lower oil pressure and reach a preset power. When the hydraulic pump 101 reaches the preset power and the oil delivered to the main oil pipeline 300 reaches the preset pressure, the fourth control valve 600 on the first oil discharge pipeline 500 can be closed, so that the hydraulic pump 101 delivers the oil to the bidirectional hydraulic motor 2010 of each emergency operation unit 200 through the main oil pipeline 300. A second pressure gauge 700 is provided on the side of the fifth one-way valve 1000 on the main oil pipeline 300 away from the hydraulic pump 101, and the pressure of the main oil pipeline 300 can be monitored through the second pressure gauge 700.

[0069] The emergency operation hydraulic system also includes a second valve block 3000. The fifth one-way valve 1000, the second pressure gauge 700, the second overflow valve 900 and the fourth control valve 600 can be integrated on the second valve block 3000, which can save pipelines, save space and cost, and improve work efficiency.

[0070] It should be noted that the structure of each emergency operation unit 200 is the same. For the convenience of description, one emergency operation unit 200 is described below.

[0071] As described above, the emergency operation unit 200 includes a bidirectional hydraulic motor 2010, which is drivingly connected to the hoist. One of the two working oil ports of the bidirectional hydraulic motor 2010 is connected to the main oil supply circuit 300 through the first oil circuit 202, and the other is connected to the main oil return circuit 400 through the second oil circuit 203. Among them, a first control valve 204 for controlling the on-off of the first oil circuit 202 is provided on the first oil circuit 202, and a second control valve 205 for controlling the on-off of the second oil circuit 203 is provided on the second oil circuit 203. The emergency operation unit 200 further includes an emergency operation oil tank 220. One of the two working oil ports of the bidirectional hydraulic motor 2010 is connected to the emergency operation oil tank 220 of the emergency operation unit 200 through the third oil circuit 206, and the other is connected to the emergency operation oil tank 220 through the fourth oil circuit 207. A first one-way valve 208 is provided on the third oil circuit 206 to allow the oil in the emergency operation oil tank 220 to enter the bidirectional hydraulic motor 2010 through the third oil circuit 206; a second one-way valve 209 is provided on the fourth oil circuit 207 to allow the oil in the emergency operation oil tank 220 to enter the bidirectional hydraulic motor 2010 through the fourth oil circuit 207. There is also a connection relationship among the first oil circuit 202, the second oil circuit 203, the third oil circuit 206, and the fourth oil circuit 207. Among them, the end of the first oil circuit 202 far from the main oil supply circuit 300 can be connected to the third oil circuit 206, and the connection between the first oil circuit 202 and the third oil circuit 206 is located between the first one-way valve 208 and the bidirectional hydraulic motor 2010. The end of the second oil circuit 203 far from the main oil return circuit 400 can be connected to the fourth oil circuit 207, and the connection between the second oil circuit 203 and the fourth oil circuit 207 is located between the second one-way valve 209 and the bidirectional hydraulic motor 2010. The first oil circuit 202 and the second oil circuit 203 are connected through a connecting oil circuit 213. The connection between the connecting oil circuit 213 and the first oil circuit 202 is located between the connection of the third oil circuit 206 on the first oil circuit 202 and the first control valve 204, and the connection between the connecting oil circuit 213 and the second oil circuit 203 is located between the connection of the fourth oil circuit 207 on the second oil circuit 203 and the second control valve 205. A first oil return circuit 210 is also connected to the connecting oil circuit 213. The end of the first oil return circuit 210 far from the connecting oil circuit 213 is connected to the emergency operation oil tank 220 of the emergency operation unit 200. A one-way throttle valve 2120 is provided on the first oil return circuit 210 to throttle the oil in the connecting oil circuit 213 flowing along the first oil return circuit 210 to the emergency operation oil tank 220. In addition, a third control valve 211 is provided on the first oil return circuit 210. The third control valve 211 is used to control the on-off of the first oil return circuit 210, and the third control valve 211 is provided between the one-way throttle valve 2120 and the emergency operation oil tank 220.In addition, a first overflow oil path 216 is also connected to the first return oil path 210. One end of the first overflow oil path 216 away from the first return oil path 210 is connected to the emergency operation oil tank 220. A first overflow valve 217 is also provided on the first overflow oil path 216. The arrangement of the first overflow oil path 216 and the first overflow valve 217 can prevent the oil pressure in the first return oil path 210 in the emergency operation unit 200 from being too high, so as to ensure the pressure safety in the emergency operation unit 200. The connection between the first overflow oil path 216 and the first return oil path 210 is located between the connection of the first return oil path 210 and the connection oil path 213 and the one-way throttle valve 2120. In addition, a first pressure gauge 218 is also provided between the connection of the first return oil path 210 and the connection oil path 213 and the one-way flow valve 212 on the first return oil path 210, for monitoring the oil pressure in the first return oil path 210.

[0072] A third one-way valve 214 is provided between the connection of the connection oil path 213 and the first return oil path 210 and the connection of the connection oil path 213 and the first oil path 202 on the connection oil path 213, to allow the oil in the connection oil path 213 to flow through the third one-way valve 214 to the first return oil path 210; a fourth one-way valve 215 is provided between the connection of the connection oil path 213 and the first return oil path 210 and the connection of the connection oil path 213 and the second oil path 203 on the connection oil path 213, to allow the oil in the connection oil path 213 to flow through the fourth one-way valve 215 to the first return oil path 210.

[0073] In addition, the emergency operation unit 200 further includes a first three-way valve 219. The oil inlet of the first three-way valve 219 is connected to the oil leakage port of the two-way hydraulic motor 2010 of the emergency operation unit 200. One of the two oil outlets of the first three-way valve 219 is connected to the emergency operation oil tank 220, and the other is connected to the main oil tank 103, so that the oil leaked from the oil leakage port in the two-way hydraulic motor 2010 can be selectively introduced into the emergency operation oil tank 220 or the main oil tank 103. Specifically, a main oil leakage return oil path 2000 connected to the main oil tank 103 can be provided. One of the two oil outlets of the first three-way valve 219 can be connected to the main oil leakage return oil path 2000 through the first oil leakage path 221, so that one of the two oil outlets of the first three-way valve 219 is connected to the main oil tank 103 through the first oil leakage path 221 and the main oil leakage return oil path 2000, and the other of the two oil outlets of the first three-way valve 219 can be connected to the emergency operation oil tank 220 through the second oil leakage path 222.

[0074] The emergency operation unit 200 further includes a first valve block 200a. The first control valve 204, the second control valve 205, the third one-way valve 214, the fourth one-way valve 215, the one-way throttle valve 2120, the third control valve 211, the first relief valve 217, and the first three-way valve 219 can be integrated in the first valve block 200a, which can save pipelines, thus saving space and cost, and can also improve work efficiency.

[0075] The emergency operation hydraulic system can drive the hoist to operate when the electrical equipment fails to supply power to the hoist, so as to open the gate in time. When the electrical equipment is fault-free, the hoist can be driven by its own motor. At this time, the bidirectional hydraulic motor 2010 will rotate with the emergency operation unit 200. It should be noted that the hoist can be a winch type hoist, and the following describes these two situations in detail.

[0076] As Figure 5 and Figure 6 As shown, the arrow direction in the figure is the flow direction of the oil fluid. When the electrical equipment is fault-free, the electrical equipment normally supplies power to the hoist, and the drive source of the hoist is the motor. At this time, the first control valve 204 on the first oil circuit 202 of the emergency operation unit 200 is in the closed state, and the second control valve 205 on the second oil circuit 203 is also in the closed state, and the third control valve 211 on the first oil return circuit 210 is in the open state. Assume that the bidirectional hydraulic motor 2010 rotates counterclockwise when the hoist drives the gate to rise, and the bidirectional hydraulic motor 2010 rotates clockwise when the hoist drives the gate to fall.

[0077] As Figure 5 As shown, when the hoist drives the gate to rise, the bidirectional hydraulic motor 2010 rotates counterclockwise under the drive of the hoist. The oil fluid in the emergency operation oil tank 220 enters the bidirectional hydraulic motor 2010 through the third oil circuit 206. After passing through the bidirectional hydraulic motor 2010, the oil fluid then flows through the fourth oil circuit 207, the second oil circuit 203, the connection oil circuit 213, and the first oil return circuit 210 and then flows back to the emergency operation oil tank 220. The oil fluid flowing out of the oil leakage port of the bidirectional hydraulic motor 2010 passes through the first three-way valve 219 and then is transported to the emergency operation oil tank 220 through the second oil leakage circuit 222.

[0078] As Figure 6As shown in the figure, when the hoist drives the gate to fall, the two-way hydraulic motor 2010 rotates clockwise under the drive of the hoist. The oil in the emergency operation oil tank 220 enters the two-way hydraulic motor 2010 through the fourth oil path 207. After passing through the two-way hydraulic motor 2010, the oil flows through the third oil path 206, the first oil path 202, the connection oil path 213, and the first oil return path 210 and then flows back to the emergency operation oil tank 220. The oil flowing out of the oil leakage port of the two-way hydraulic motor 2010 passes through the first three-way valve 219 and is then transported to the emergency operation oil tank 220 through the second oil leakage path 222.

[0079] When electrical equipment fails or there is no power, the hoist can be driven by the emergency operation hydraulic system to complete the lifting of the gate. As Figures 1 to 6 shown, the emergency operation hydraulic system includes a plurality of emergency operation units 200. Each emergency operation unit 200 is correspondingly arranged with a hoist. The hydraulic pump 101 in the power unit 100 can pump oil to the two-way hydraulic pumps 101 in each emergency operation unit 200 in sequence through the main oil delivery path 300 to sequentially complete the lifting of multiple gates. Of course, the hydraulic pump 101 of the power unit 100 can also simultaneously transport oil to the two-way hydraulic pumps 101 in multiple emergency operation units 200 to simultaneously complete the lifting of multiple gates, and there is no limitation here. For the convenience of description, the following will describe with one emergency operation unit 200.

[0080] When there is no power, it is necessary to drive the hoist to operate through this emergency operation hydraulic system, and then complete the lifting of the gate. The first control valve 204 on the first oil path 202 and the second control valve 205 on the second oil path 203 are both in the closed state. First, open the fourth control valve 600 on the first oil discharge path 500, and then start the internal combustion engine 1020. The internal combustion engine 1020 drives the hydraulic pump 101 to operate. As Figure 3 shown, the hydraulic pump 101 transports the oil in the main fuel tank 103 to the first oil discharge path 500 through the main oil delivery path 300. The oil transported to the first oil discharge path 500 flows back to the main fuel tank 103 after passing through the first oil discharge path 500. Observe the reading of the second pressure gauge 700. When the oil pressure in the main oil delivery path 300 reaches the preset value, close the fourth control valve 600. At the same time, open the first control valve 204 and the second control valve 205 of one of the multiple emergency operation units 200, and close the third control valve 211, so that the main oil delivery path 300 is connected to one of the two working oil ports of the two-way hydraulic motor 2010 through the first oil path 202 and the third oil path 206, and the main oil return path 400 is connected to the other of the two working oil ports of the two-way hydraulic motor 2010 through the second oil path 203 and the fourth oil path 207. Control the action of the first three-way valve 219 so that the oil leakage port of the two-way hydraulic motor 2010 is connected to the main fuel tank 103. AsFigure 4 As shown, the oil pumped by the hydraulic pump 101 passes through the main oil transmission pipeline 300 and then enters the bidirectional hydraulic motor 2010, driving the bidirectional hydraulic motor 2010 to rotate counterclockwise, driving the hoist to operate, and the hoist drives the gate connected thereto to lift. The oil discharged from the oil leakage port of the bidirectional hydraulic pump 101 is transported to the main fuel tank 103 through the first three-way valve 219, the first oil leakage pipeline 221, and the main oil leakage return pipeline 2000.

[0081] In the case of power failure, the gate can descend relying on its own gravity. When the gate needs to descend, the first control valve 204 and the second control valve 205 are closed, the third control valve 211 is opened, and the first three-way valve 219 is controlled to act, so that the oil leakage port of the bidirectional hydraulic motor 2010 is communicated with the emergency operation fuel tank 220. As Figure 6 shown, when the gate falls and closes relying on its own gravity, the hoist drives the bidirectional hydraulic motor 2010 to run clockwise. The oil in the emergency operation fuel tank 220 enters the bidirectional hydraulic motor 2010 through the fourth pipeline 207. After passing through the bidirectional hydraulic motor 2010, the oil then passes through the third pipeline 206, the first pipeline 202, the connection pipeline 213, and the first oil return pipeline 210 and then flows back to the emergency operation fuel tank 220 again. The one-way throttle valve 2120 provided on the first oil return pipeline 210 is used for throttling the oil flowing through the first oil return pipeline 210 to control the running speed of the bidirectional hydraulic motor 2010, and further control the descending speed of the gate. The oil discharged from the oil leakage port of the bidirectional hydraulic motor 2010 is transported to the emergency operation fuel tank 220 through the first three-way valve 219 and the second oil leakage pipeline 222.

[0082] It should be noted that the emergency operation hydraulic system includes multiple emergency operation units 200. When the gate corresponding to one of the emergency operation units 200 is in the descending state, the hydraulic pump 101 of the power unit 100 can supply oil to the bidirectional hydraulic motor 2010 of another emergency operation unit 200 to drive the lifting of the corresponding gate. That is, these two emergency operation units 200 do not affect each other, and details are not described herein again.

[0083] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of 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 protection scope of the present disclosure.

[0084] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure does not separately describe various possible combination methods.

[0085] In addition, any combination can be made among various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should equally be regarded as the content disclosed by the present disclosure.

Claims

1. A gate set of a hydropower station, characterized in that, Comprising: At least two gates; At least two hoisting machines, which are connected to the at least two gates in a one-to-one correspondence for driving the lifting of the gates; An emergency operation hydraulic system, including a power unit and at least two emergency operation units. The power unit includes a hydraulic pump. The at least two emergency operation units and the at least two hoisting machines are arranged in a one-to-one correspondence. The emergency operation unit includes a hydraulic motor drivingly connected to the hoisting machine. The hydraulic motors of the at least two emergency operation units are each connected to the hydraulic pump.

2. The gate group of the hydropower station according to claim 1, characterized in that, The at least two hoisting machines are arranged at intervals in a first direction. The at least two emergency operation units are arranged at intervals in the first direction. The power unit is located at an intermediate position in the first direction of the at least two emergency operation units.

3. The gate set of the hydropower station according to claim 1, characterized in that, The power unit further includes a power device drivingly connected to the hydraulic pump, and the power device is configured as an internal combustion engine.

4. The gate set of the hydropower station according to any one of claims 1-3, characterized in that, The power unit further includes a main oil tank. The emergency operation hydraulic system further includes a main oil supply oil circuit and a main oil return oil circuit respectively connected to the main oil tank. The hydraulic motor includes two working oil ports. One of the two working oil ports is connected to the main oil supply oil circuit through a first oil circuit, and the other is connected to the main oil return oil circuit through a second oil circuit. A first control valve for controlling the on / off of the first oil circuit is provided on the first oil circuit. A second control valve for controlling the on / off of the second oil circuit is provided on the second oil circuit. The hydraulic pump is arranged on the main oil supply oil circuit.

5. The gate set of the hydropower station according to claim 4, characterized in that, The emergency operation unit further includes an emergency operation oil tank. The hydraulic motor is a two-way hydraulic motor. One of the two working oil ports of the two-way hydraulic motor is connected to the emergency operation oil tank through a third oil circuit, and the other is connected to the emergency operation oil tank through a fourth oil circuit. A first one-way valve is provided on the third oil circuit for allowing the oil in the emergency operation oil tank to enter the two-way hydraulic motor through the third oil circuit. A second one-way valve is provided on the fourth oil circuit for allowing the oil in the emergency operation oil tank to enter the two-way hydraulic motor through the fourth oil circuit. The emergency operation unit further includes a first oil return oil circuit. The third oil circuit and the fourth oil circuit are both connected to the first oil return oil circuit for enabling the oil output by the two-way hydraulic motor to flow to the emergency operation oil tank through the first oil return oil circuit. A third control valve for controlling its on / off is provided on the first oil return oil circuit.

6. The gate set of the hydropower station according to claim 5, characterized in that, A flow valve is provided on the first oil return oil circuit for regulating the flow rate of the oil flowing to the emergency operation oil tank through the first oil return oil circuit.

7. The gate set of the hydropower station according to claim 6, characterized in that, The first oil circuit is connected between the first one-way valve of the third oil circuit and the two-way hydraulic motor. The second oil circuit is connected between the second one-way valve of the fourth oil circuit and the two-way hydraulic motor. The emergency operation unit further includes a connecting oil circuit. One end of the connecting oil circuit is connected between the first control valve on the first oil circuit and the connection of the third oil circuit. The other end of the connecting oil circuit is connected between the second control valve on the second oil circuit and the connection of the fourth oil circuit. The first oil return circuit is communicated with the connecting oil circuit. A third one-way valve for allowing the oil in the first oil circuit to flow through the connecting oil circuit to the first oil return circuit is arranged between the connection of the first oil return circuit on the connecting oil circuit and the connection of the first oil circuit. A fourth one-way valve for allowing the oil in the second oil circuit to flow through the connecting oil circuit to the first oil return circuit is arranged between the connection of the first oil return circuit on the connecting oil circuit and the connection of the second oil circuit.

8. The gate set of the hydropower station according to claim 7, characterized in that, A first overflow oil circuit is connected to the first oil return circuit, and a first overflow valve is arranged on the first overflow oil circuit; and / or A first pressure gauge is arranged on the first oil return circuit.

9. The gate group of the hydropower station according to claim 4, characterized in that, The emergency operation unit further includes an emergency operation oil tank and a first three-way valve. The oil leakage port of the hydraulic motor is communicated with the oil inlet of the first three-way valve. One of the two oil outlets of the first three-way valve is communicated with the main oil tank, and the other is communicated with the emergency operation oil tank.

10. The gate set of the hydropower station according to claim 4, characterized in that, The main oil supply circuit is connected with a first oil discharge circuit. One end of the first oil discharge circuit far from the main oil supply circuit is communicated with the main oil tank. A fourth control valve for controlling the on-off of the first oil discharge circuit is arranged on the first oil discharge circuit; and / or A second pressure gauge is arranged on the main oil supply circuit.

Images