阅读说明：本技术 水轮机调速器液压系统压力容器应急补气补油系统及方法 (Emergency air-supplementing and oil-supplementing system and method for pressure vessel of hydraulic system of hydraulic turbine governor ) 是由 涂勇 于 2021-06-06 设计创作，主要内容包括：水轮机调速器液压系统压力容器应急补气补油系统及方法,该系统包括应急补气补油装置、电控系统。具体包括油罐、传感器组、补气装置、控制器、人机交互装置、补油阀组、气管、油管、电气回路、通迅回路、补给罐、手动阀。本发明在系统黑启动等应急状态下,能根据压力油罐的液位和压力,自动控制应急补气补油装置进行自动补油增压或自动补气,保证水轮机调速器液压控制系统中的压力油罐中油气比在合理范围,从而确保调速器液压控制系统能提供长效稳定并压力指标达标的压力油源去操作导叶开度执行机构。(The system comprises an emergency air-supplementing and oil-supplementing device and an electric control system. The system comprises an oil tank, a sensor group, an air supplementing device, a controller, a human-computer interaction device, an oil supplementing valve group, an air pipe, an oil pipe, an electric loop, a communication loop, a supply tank and a manual valve. The invention can automatically control the emergency air-supplementing and oil-supplementing device to automatically supplement oil and boost pressure or supplement air according to the liquid level and the pressure of the pressure oil tank under emergency states such as black start of the system and the like, and ensure that the oil-gas ratio in the pressure oil tank in the hydraulic control system of the hydraulic turbine governor is in a reasonable range, thereby ensuring that the hydraulic control system of the governor can provide a pressure oil source with long-term stability and standard pressure index to operate the guide vane opening actuating mechanism.)

1. Emergent tonifying qi oil supplementing device of hydraulic governor hydraulic system pressure vessel, its characterized in that: the emergency air-supplementing and oil-supplementing device comprises a supplementing tank (BGG), wherein the supplementing tank (BGG) is connected with an air-supplementing air filter (100FJ), and the air-supplementing air filter (100FJ) is connected with an air-supplementing device (101 EL);

the air supplementing device (101EL) comprises an oil tank (YG), and the oil tank (YG) is connected with the air supplementing device (101 EL);

the oil tank (YG) is connected with a supply tank (BGG) through a pressure oil pipeline, the supply tank (BGG) is connected with the oil tank (YG), and the pressure oil pipeline is provided with an oil supply valve group (100 RI);

the supply tank (BGG) is provided with a supply tank safety valve (200VQ), a supply tank oil level gauge (200LN), a supply tank liquid level sensor (201MN), a supply tank pressure gauge (200PG) and a supply tank pressure sensor (221 MP);

the oil tank (YG) is provided with an oil tank safety valve (100VQ), a pressure tank oil level gauge (100LN), a pressure tank liquid level sensor (101MN), an oil tank liquid level switch sensor, a pressure tank pressure gauge (100PG) and a pressure tank pressure sensor (121 MP).

2. The emergency air-supply and oil-supply device for the pressure vessel of the hydraulic system of the hydraulic turbine governor according to claim 1, which is characterized in that: the gas supply device (101EL) further comprises: an electric valve (301PV), a manual air supply valve (401), an automatic air supply one-way valve (100VT), and a manual exhaust valve (402);

the oil compensating valve group (100RI) comprises: oil-supplementing hydraulic control valve, oil-supplementing switching electromagnetic valve and oil-supplementing hand valve (star 113);

the oil supplementing hydraulic control valve and the oil supplementing switch electromagnetic valve are connected with an electric control system, and the electric control system is used for controlling the on-off of the current of the switch electromagnetic coils at two ends of the oil supplementing switch electromagnetic valve of the oil supplementing valve group (100RI), so that the pressure of the liquid control cavities at two ends of the oil supplementing hydraulic control valve is controlled, the on-off action of the oil supplementing hydraulic control valve is further controlled, and the oil can (YG) is automatically supplemented with oil or supplemented with pressure;

and the oil supplementing hand valve (star 113) is connected with the oil supplementing hydraulic control valve and is used for manually supplementing oil or pressure to the oil tank.

3. The emergency air-supply and oil-supply device for the pressure vessel of the hydraulic system of the hydraulic turbine governor as claimed in claim 2, characterized in that: the electric valve (301PV) is connected with the electric control system and controls the opening and closing actions of the electric valve (301PV) so as to control the automatic on-off of the air supply pipe and supply air to the oil tank (YG);

a manual air supplement valve ([ 401') for manually supplementing air to the oil tank (YG);

and a manual air exhaust valve (402) for manually exhausting the oil tank (YG).

4. Emergent tonifying qi oil supplementing system of hydraulic governor hydraulic system pressure vessel, its characterized in that includes:

the system comprises an oil tank (YG), a sensor group (a1), an air supply device (101EL), a controller (a2), a man-machine interaction device (a3), an oil supply valve group (100RI), an air pipe (a4), an oil pipe (a5), an electric circuit (a6), a communication circuit (a7) and a supply tank (BGG);

the sensor group (a1) comprises a plurality of sensor units, and the sensor units are used for respectively acquiring the pressure of the oil tank (YG), the oil level of the oil tank (YG), the switching position state of a gas supplementing valve of a gas supplementing device (101EL), the switching position state of a gas supplementing valve group (100RI), the pressure of a supplementing tank (BGG) and the oil level of the supplementing tank (BGG), and transmitting the pressure to the controller (a2) through an electric circuit (a 6);

the air supply device (101EL) receives an air supply valve switching control command output to the air supply device (101EL) by the controller (a2) through an electric circuit (a 6);

the controller (a2) receives the hydraulic control system control parameters of the hydraulic control system emergency air supplement liquid level, emergency air supplement pressure and emergency oil supplement pressure set by the man-machine interaction device (a3) through the communication loop (a7), controls the emergency air supplement and oil supplement device of the hydraulic control system of the hydraulic turbine governor after logic processing is carried out according to the hydraulic control system state signals collected by the sensor group (a1) received through the electric loop (a6), controls the air supplement valve and the oil supplement valve bank (100RI) of the air supplement device (101EL) through the electric loop (a6), and simultaneously transmits the state information of the hydraulic control system to the man-machine interaction device (a3) through the communication loop (a 7);

the man-machine interaction device (a3) is communicated with the controller (a2), and a user controls parameters of a hydraulic control system and the emergency air supplement liquid level H of the hydraulic control system through the hydraulic control system control parameters set by the man-machine interaction device (a3)_{Air supplement}Emergency air supply pressure P_{Air supplement}Emergency oil-supplementing pressure P_{Oil supplement}And the state information is transmitted to the controller (a2), and meanwhile, the man-machine interaction device (a3) acquires the state information of the hydraulic control system sent by the controller (a2) and displays the state information graphically.

5. The emergency air-supply and oil-supply system for the pressure vessel of the hydraulic system of the hydraulic turbine governor according to claim 4, characterized in that: the oil supplementing valve group (100RI) is positioned on the oil pipe (a5), and when the oil tank (YG) needs oil supplementation, the oil supplementing valve group (100RI) is manually or automatically opened;

a first air pipe is arranged between the supply tank (BGG) and the air supply device (101EL), and a second air pipe is arranged between the air supply device (101EL) and the oil tank (YG);

a first oil pipe is arranged between the supply tank (BGG) and the oil supplementing valve group (100RI), a second oil pipe is arranged between the oil supplementing valve group (100RI) and the oil tank (YG), and the oil pipes are used for providing a pressure oil source to operate the guide vane opening degree actuating mechanism.

6. The emergency air-supply and oil-supply system for the pressure vessel of the hydraulic system of the hydraulic turbine governor according to claim 4, characterized in that: the sensor group (a1) is connected with the controller (a2) through an electric circuit (a6), the air supplementing device (101EL) is connected with the controller (a2) through an electric circuit (a6), and the electric circuit (a6) is used for the oil supplementing valve group (100RI) and the controller (a2) to realize the transmission of state signals and control signals.

7. The emergency air-supply and oil-supply system for the pressure vessel of the hydraulic system of the hydraulic turbine governor according to claim 4, characterized in that: the controller (a2) is connected with the man-machine interaction device (a3) through a communication circuit (a7), and control parameters and state information of the hydraulic control system are transmitted.

8. The emergency air-supply and oil-supply system for the pressure vessel of the hydraulic system of the hydraulic turbine governor according to claim 4, characterized in that: the supply tank (BGG) is used for storing a pressure container which is used for providing an emergency pressure air source and an oil source for the oil tank (YG).

9. The emergency air-supply and oil-supply system for the pressure vessel of the hydraulic system of the hydraulic turbine governor according to claim 4, characterized in that: the system comprises a manual valve (a8), wherein the manual valve (a8) is positioned on an oil pipe (a5), and when a pressure oil source is required to be provided by a hydraulic control system of the speed regulator to operate a guide vane opening actuator, the manual valve (a8) is opened manually.

10. An emergency automatic air-supplementing and oil-supplementing method for a hydraulic control system of a hydraulic turbine governor is characterized by comprising the following steps:

step 1, initializing a controller (a2), detecting whether an emergency state exists, and if so, entering the steps 2 and 21; otherwise, continuing the detection;

step 2, the controller (a2) detects whether the gulp valve is opened, if yes, the step 12 is entered; otherwise, entering the next step;

step 3, the hydraulic control system enters an emergency non-air-supply state and enters the next step;

step 4, the controller (a2) detects whether the hydraulic control system is in the running state and automatically controls, if so, the next step is carried out; otherwise, entering the step 3;

step 5, the controller (a2) detects whether the oil tank pressure of the hydraulic control system is detected<P_{Air supplement}If yes, entering the next step; otherwise, entering the step 3;

step 6, the controller (a2) detects whether the hydraulic control system oil tank liquid level is detected>H_{Air supplement}If yes, entering the next step; otherwise, entering the step 3;

7, the controller (a2) detects whether the oil tank pressure of the hydraulic control system is less than the pressure of the supply tank, if yes, the next step is carried out; otherwise, entering the step 3;

step 8, the controller (a2) detects whether the pressure and the liquid level of the oil tank and the supply tank of the hydraulic control system have no fault alarm, if so, the next step is carried out; otherwise, entering the step 3;

9, the hydraulic control system enters the opening process of the gulp valve and then enters the next step;

step 10, the controller (a2) sends out an opening and supplementing air valve control command, and the next step is carried out;

step 11, the controller (a2) detects whether the gulp valve is opened, if so, the next step is carried out; otherwise, entering the step 17;

step 12, the hydraulic control system enters an emergency gas supplementing state and enters the steps 13, 18 and 19;

step 13, the controller (a2) detects whether the air supply of the hydraulic control system lasts for 5 minutes, if yes, the next step is carried out; otherwise, continuing the detection;

step 14, the hydraulic control system enters an air supply closing process and enters the next step;

step 15, the controller (a2) sends out a control command of closing the gulp valve, and the next step is carried out;

step 16, the controller (a2) detects whether the gulp valve is closed, if so, the step 3 is carried out; otherwise, entering the step 20;

step 17, the controller (a2) detects whether the air compensating valve is not opened after being kept for 30 seconds, if so, the failure of opening the air compensating valve is reported, and the step 3 is entered, otherwise, the step 11 is entered;

step 18, the controller (a2) detects whether the pressure of the oil tank and the pressure of the supply tank and the liquid level sensor are in failure, if so, the step 14 is carried out, otherwise, the step 2 is carried out;

step 19, detecting whether the air supply of the hydraulic control system lasts for 6 minutes by the controller (a2), if so, reporting an air supply overtime fault, and entering step 14, otherwise, entering step 2;

step 20, the controller (a2) detects whether the gulp valve is not closed after being kept for 40 seconds, if so, the failure fault of the gulp valve closing is reported, and the step 12 is entered, otherwise, the step 16 is entered;

step 21, the controller (a2) detects whether the oil replenishing valve is opened, if yes, the step 30 is carried out; otherwise, entering the next step;

step 22, the hydraulic control system enters an emergency non-oil-supplementing state and enters the next step;

step 23, the controller (a2) detects whether the hydraulic control system is in an operating state and automatically controls, if so, the next step is carried out; otherwise, entering step 22;

step 24, the controller (a2) detects whether the hydraulic control system tank pressure is in the hydraulic control system<P_{Oil supplement}If yes, entering the next step; otherwise, entering step 22;

step 25, the controller (a2) detects whether the oil tank pressure of the hydraulic control system is less than the pressure of the supply tank, if yes, the next step is carried out; otherwise, entering step 22;

26, the controller (a2) detects whether the pressure and the liquid level of the oil tank and the supply tank of the hydraulic control system have no fault alarm, if so, the next step is carried out; otherwise, entering step 22;

27, the hydraulic control system enters an opening process of an oil replenishing valve and enters the next step;

step 28, the controller (a2) sends out a control command of an oil opening and replenishing valve, and the next step is carried out;

step 29, the controller (a2) detects whether the oil replenishing valve is opened, if so, the next step is carried out; otherwise, entering the step 17;

step 30, the hydraulic control system enters an emergency oil supplementing state, and the steps 31, 18 and 19 are carried out;

step 31, detecting whether oil supplement of the hydraulic control system lasts for 5 minutes by the controller (a2), and if yes, entering the next step; otherwise, continuing the detection;

step 32, the hydraulic control system enters an oil supplementing closing process and enters the next step;

step 33, the controller (a2) sends out a control command of closing the oil replenishing valve, and the next step is carried out;

step 34, the controller (a2) detects whether the oil replenishing valve is closed, if yes, the step 22 is carried out; otherwise, entering step 38;

step 35, the controller (a2) detects whether the oil replenishing valve is not opened after being kept for 30 seconds, if yes, the failure fault of opening the oil replenishing valve is reported, and the step 22 is started, otherwise, the step 29 is started;

step 36, the controller (a2) detects whether the pressure of the oil tank and the supply tank and the liquid level sensor are in failure, if so, the step 32 is carried out, otherwise, the step 21 is carried out;

step 37, the controller (a2) detects whether oil supplement of the hydraulic control system lasts for 6 minutes, if yes, an air supplement overtime fault is reported, and the step 32 is entered, otherwise, the step 21 is entered;

and step 38, the controller (a2) detects whether the oil replenishing valve is not closed for 40 seconds, if so, the failure fault of the oil replenishing valve closing is reported, and the step 30 is entered, otherwise, the step 34 is entered.

Technical Field

The invention belongs to the technical field of hydraulic control systems of speed regulators of hydroelectric generating sets, and particularly relates to an emergency air and oil supplementing system and method for a pressure container of a hydraulic system of a hydraulic turbine speed regulator.

Background

The speed regulator of the hydroelectric generating set adjusts the opening degree of the guide vane, the power and the frequency of the generating set, and a hydraulic control system of the speed regulator is required to provide a long-acting stable pressure oil source with indexes reaching standards in all aspects such as pressure, temperature, pressure oil particle content and the like to operate the opening degree actuating mechanism of the guide vane. Because the oil has the characteristic of difficult compressibility, in order to ensure that the oil has relatively stable pressure, a pressure container must be filled with part of gas, and a speed regulator hydraulic control system is required to control the automatic air supply system according to the content of the gas in the pressure container. Chinese patent "oil pressure device for hydro governor and its hydro governor" (application No. 201921922421.4) only discloses an oil pressure device for hydro governor and its electrical control system circuit structure; the Chinese patent 'integrated water turbine speed regulating system automatic air supply device' (application number 201921999139.6) discloses an integrated water turbine speed regulating system automatic air supply device.

When the pressure of a pressure container of a speed regulator hydraulic control system in the prior art is insufficient, oil is usually taken through an oil return tank, and pressure oil is supplemented through a pressure oil pump; when the gas-oil ratio of the pressure container is out of the rated value and is short of gas, the gas is supplemented by an automatic gas supplementing device, the fact that the oil is short of oil due to oil leakage of the system is not considered, and the external sufficient power supply is not available in the black starting state, the pressure oil pump cannot supplement pressure oil due to the unpowered power supply, the air compressor cannot supply the power supply, the high-pressure gas system cannot normally work, the normal automatic gas supplementing condition cannot be realized, and the emergency gas supplementing and oil supplementing device is not suitable for emergency gas supplementing.

Disclosure of Invention

The invention provides an emergency air-supplementing and oil-supplementing system and method for a pressure vessel of a hydraulic system of a hydraulic turbine governor, aiming at solving the problem of oil shortage and oil supplementation caused by oil leakage of the system; or under the conditions that no external sufficient power supply is available in emergency states such as black start and the like, and pressure oil and the like cannot be supplemented by the unpowered power supply of the pressure oil pump, the problem of oil pressure maintenance or oil liquid loss of the system is solved through emergency treatment. Therefore, the speed regulator hydraulic control system is ensured to provide a long-acting stable pressure oil source with pressure indexes reaching the standards to operate the guide vane opening actuating mechanism.

The technical scheme adopted by the invention is as follows:

the emergency air supply and oil supplement device comprises an emergency air supply and oil supplement device 102EL, wherein the emergency air supply and oil supplement device comprises a supply tank BGG, the supply tank BGG is connected with an air supply air filter 100FJ, and the air supply air filter 100FJ is connected with an air supply device 101 EL;

the air supplement device 101EL comprises an oil tank YG, and the oil tank YG is connected with the air supplement device 101 EL;

the oil tank YG is connected with a supply tank BGG through a pressure oil pipeline, the supply tank BGG is connected with the oil tank YG, and the pressure oil pipeline is provided with an oil supply valve group 100 RI;

the supply tank BGG is provided with a supply tank safety valve 200VQ, a supply tank oil level gauge 200LN, a supply tank liquid level sensor 201MN, a supply tank pressure gauge 200PG and a supply tank pressure sensor 221 MP;

the oil tank YG is provided with an oil tank safety valve 100VQ, a pressure tank oil level gauge 100LN, a pressure tank level sensor 101MN, oil tank level switch sensors 101SN-104SN, pressure tank pressure switch sensors 101PS-102PS, a pressure tank pressure gauge 100PG, and a pressure tank pressure sensor 121 MP.

The gas supplementing device 101EL further includes: electric valve 301PV, manual air supplement valve 401, automatic air supplement one-way valve 100VT, manual exhaust valve 402;

the oil compensating valve group 100RI includes: oil-supplementing hydraulic control valve, oil-supplementing switching electromagnetic valve and oil-supplementing hand valve 113;

the oil supplementing hydraulic control valve and the oil supplementing switch electromagnetic valve are connected with an electric control system, the electric control system is used for controlling the current on-off of the switch electromagnetic coils 107EN and 106EN at two ends of the oil supplementing switch electromagnetic valve of the oil supplementing valve group 100RI, so that the pressure of the hydraulic control cavities at two ends of the oil supplementing hydraulic control valve is controlled, the switching action of the oil supplementing hydraulic control valve is further controlled, the oil is automatically supplemented or supplemented to the oil tank YG, the volume of the oil tank is constant, and the oil pressure can be increased due to the oil supplementing into the oil tank, so that the oil supplementing hydraulic control valve can be called as pressure supplementing.

The oil supplementing hand valve 113 is connected with an oil supplementing hydraulic control valve and is used for manually supplementing oil or pressure to the oil tank.

The electric valve 301PV is connected with the electric control system and controls the opening and closing actions of the electric valve 301PV so as to control the automatic on-off of the gas supplementing pipe and supplement gas to the oil tank YG;

a manual air supplement valve 401 for manually supplementing air to the oil tank YG;

a manual air vent valve 402 for manually venting the oil tank YG.

Emergent tonifying qi oil supplementing system of hydraulic governor hydraulic system pressure vessel includes:

the system comprises an oil tank YG, a sensor group, an air supplement device 101EL, a controller, a man-machine interaction device, an oil supplement valve group 100RI, an air pipe, an oil pipe, an electric circuit, a communication circuit and a supply tank BGG.

The oil tank YG is a pressure oil tank;

the sensor group comprises a plurality of sensor units, and the sensor units are used for respectively acquiring the YG pressure of the oil tank, the YG oil level of the oil tank, the switching position state of a gas supplementing valve of a gas supplementing device 101EL, the switching position state of an RI (Ri) valve group of the oil supplementing device, the BGG pressure of the supply tank and the BGG oil level of the supply tank and transmitting the switching position state, the BGG pressure and the BGG oil level of the supply tank to the controller through an electric circuit;

the air supplementing device 101EL receives an air supplementing valve switch control command output to the air supplementing device 101EL by the controller through an electric loop, and meanwhile, the sensor group acquires the position state of an air supplementing valve switch of the air supplementing device 101 EL;

the controller receives hydraulic control system control parameters such as emergency air supplement liquid level, emergency air supplement pressure, emergency oil supplement pressure and the like of the hydraulic control system through the communication loop, carries out logic processing by adopting an emergency automatic air supplement and oil supplement method of the hydraulic control system of the hydraulic governor according to hydraulic control system state signals collected by the sensor group received through the electrical loop, controls the emergency air supplement and oil supplement device of the hydraulic control system of the hydraulic governor, carries out on-off control on an air supplement valve of the air supplement device 101EL and an oil supplement valve group 100RI through the electrical loop, and simultaneously transmits state information of the hydraulic control system to the human-computer interaction device through the communication loop.

Man-machine interactive deviceCommunicating with a controller to set the control parameters of the hydraulic control system, such as the emergency air-supply level H of the hydraulic control system, via a human-computer interaction device_{Air supplement}Emergency air supply pressure P_{Air supplement}Emergency oil-supplementing pressure P_{Oil supplement}And the state information of the hydraulic control system sent by the controller is collected by the man-machine interaction device for graphical display.

The oil replenishing valve group 100RI is located on an oil pipe, and when the oil tank YG needs oil replenishing, the oil replenishing valve group 100RI is manually or automatically opened.

A first air pipe is arranged between the supply tank BGG and the air supply device 101EL, and a second air pipe is arranged between the air supply device 101EL and the oil tank YG;

and a first oil pipe is arranged between the supply tank BGG and the oil supplementing valve group 100RI, a second oil pipe is arranged between the oil supplementing valve group 100RI and the oil tank YG, and the oil pipes are used for providing a pressure oil source to operate the guide vane opening actuating mechanism.

The sensor group is connected with the controller through an electric circuit, the air supplementing device 101EL is connected with the controller through the electric circuit, and the electric circuit is used for the oil supplementing valve group 100RI and the controller to realize the transmission of state signals and control signals.

The controller is connected with the man-machine interaction device through a communication loop, and transmission of control parameters and state information of the hydraulic control system is achieved.

The supply tank BGG is used for storing a pressure container which is used for providing an emergency pressure air source and an oil source for the oil tank YG.

The system comprises a manual valve, wherein the manual valve is positioned on an oil pipe, and when a speed regulator hydraulic control system is required to provide a pressure oil source to operate a guide vane opening actuating mechanism, the manual valve is opened manually.

The invention relates to an emergency air-supplementing and oil-supplementing system and method for a pressure vessel of a hydraulic system of a hydraulic turbine governor, which have the following technical effects:

1) the emergency air and oil supplementing device for the hydraulic control system of the hydraulic turbine governor can realize the functions of manual air and oil supplementing, automatic air and oil supplementing and manual exhaust, and has wide applicability.

2) The emergency automatic air and oil supplementing control method for the hydraulic control system of the hydraulic turbine governor can solve the problems of reasonable supplement of oil and gas in a pressure oil tank of the hydraulic control system of the hydraulic turbine governor under the conditions of oil shortage and air supplement caused by oil leakage of the system and air shortage and air supplement caused by air leakage of the system, and stable transition conversion of the air supplement state and non-air supplement state conversion process of an air supplement device of the hydraulic control system, and the like, and ensures that the hydraulic control system of the governor can provide a long-acting stable pressure oil source with standard pressure indexes to operate a guide vane opening actuating mechanism.

3) The emergency automatic air and oil supply control method for the hydraulic control system of the hydraulic turbine governor can solve the problems of system oil pressure maintenance or oil liquid loss in the emergency treatment under the conditions that no external sufficient power supply is available in emergency states such as black start and the like, and pressure oil cannot be supplied by an unpowered power supply of a pressure oil pump, and ensures that the hydraulic control system of the governor provides a long-acting stable pressure oil source with a pressure index reaching the standard to operate a guide vane opening actuating mechanism.

4) The emergency air-supplementing and oil-supplementing control method for the hydraulic control system of the hydraulic turbine governor has strong control safety and stability, gives an alarm and disposals in abnormal working conditions of equipment such as air-supplementing valve opening failure, air-supplementing valve closing failure, oil-supplementing valve opening failure, oil-supplementing valve closing failure, faults of pressure liquid level sensors of a supply tank and an oil tank, air-supplementing and oil-supplementing overtime and the like, and avoids the condition that a logic disorder runaway control program of the emergency automatic air-supplementing and oil-supplementing control program of the hydraulic control system of the governor and accidents influencing system safety in the state conversion process of the emergency automatic air-supplementing and oil-supplementing device.

Drawings

Fig. 1 is a schematic structural view of an emergency air and oil supply device of a hydraulic control system of a hydraulic turbine governor according to the present invention.

Fig. 2 is a schematic structural diagram of an electric control system of the emergency air and oil supply device of the hydraulic control system of the hydraulic turbine governor of the invention.

Fig. 3 is a flow chart of an emergency automatic air and oil supply control method of a hydraulic control system of a hydraulic turbine governor of the present invention.

FIG. 4 is a schematic representation of various line types in FIG. 1.

Detailed Description

The invention relates to an emergency air-supplement and oil-supplement system and method for a hydraulic system pressure container of a hydraulic turbine governor, which can automatically control an emergency air-supplement and oil-supplement device to automatically supplement oil and pressurize or supplement air according to the liquid level and the pressure of a pressure oil tank in an emergency state such as black start of the system and the like, and ensure that the oil-gas ratio in the pressure oil tank of the hydraulic control system of the hydraulic turbine governor is in a reasonable range, thereby ensuring that the hydraulic control system of the governor can provide a long-acting stable pressure oil source with standard pressure index to operate a guide vane opening actuating mechanism.

As shown in fig. 1, the emergency air-supplementing and oil-supplementing device 102EL includes a supply tank BGG, an oil-supplementing valve group 100RI, an air-supplementing air filter 100FJ, a supply tank safety valve 200VQ, a supply tank pressure gauge 200PG, a supply tank oil level gauge 200LN, a supply tank level sensor 201MN, a pressure tank pressure sensor 221MP, a supply tank BGG, and an oil-supplementing device 101 EL. The emergency air-supplementing and oil-supplementing device for the pressure vessel of the hydraulic system of the hydraulic turbine governor can realize the functions of emergency manual air-supplementing and oil-supplementing, emergency automatic air-supplementing and oil-supplementing and manual exhaust, and has wide applicability.

The supply tank BGG is connected with an air supply filter 100FJ, and the air supply filter 100FJ is connected with an air supply device 101 EL;

the air supplement device 101EL comprises an oil tank YG, and the oil tank YG is connected with the air supplement device 101 EL;

the oil tank YG is connected with the supply tank BGG through a pressure oil pipeline, the supply tank BGG is connected with the oil tank YG, the pressure oil pipeline is provided with an oil supply valve group 100RI, and the pressure oil pipeline is provided with a hand valve.

The supply tank BGG is provided with a supply tank safety valve 200VQ, a supply tank oil level gauge 200LN, a supply tank liquid level sensor 201MN, a supply tank pressure gauge 200PG and a supply tank pressure sensor 221 MP;

the oil tank YG is provided with an oil tank safety valve 100VQ, a pressure tank oil level gauge 100LN, a pressure tank level sensor 101MN, oil tank level switch sensors 101SN-104SN, pressure tank pressure switch sensors 101PS-102PS, a pressure tank pressure gauge 100PG, and a pressure tank pressure sensor 121 MP.

The gas supplementing device 101EL further includes: electric valve 301PV, manual air supplement valve 401, automatic air supplement one-way valve 100VT, manual exhaust valve 402, air pipe;

the oil compensating valve group 100RI includes: the oil supplementing hydraulic control valve, the oil supplementing switch electromagnetic valve, the oil supplementing hand valve 113 and the control pipeline;

the oil supplementing hydraulic control valve and the oil supplementing switch electromagnetic valve are connected with an electric control system, and the electric control system is used for controlling the current on-off of the switch electromagnetic coils 107EN and 106EN at the two ends of the oil supplementing switch electromagnetic valve of the oil supplementing valve group 100RI, so that the pressure of the hydraulic control cavities at the two ends of the oil supplementing hydraulic control valve is controlled, the switching action of the oil supplementing hydraulic control valve is further controlled, and the oil can YG is automatically supplemented or supplemented with pressure;

the oil supplementing hand valve 113 is connected with an oil supplementing hydraulic control valve and is used for supplementing oil or pressure to the oil tank.

The electric valve 301PV is connected with an electric control system and controls the opening and closing actions of the electric valve 301PV so as to control the automatic on-off of the gas supplementing pipe and manually supplement gas to the oil tank YG;

a manual air supplement valve 401 for supplementing air to the oil tank YG; a manual air vent valve 402 for manually venting the oil tank YG.

TABLE 1 Emergency AIR-SUPPLYING AND OIL-SUPPLYING DEVICE 102EL ELEMENT PARAMETER TABLE

Serial number	Name (R)	(Code)	Number of
				1	Air filter for air supply	100FJ	1
2	Air supplement device	101EL	1
				3	Oil level gauge of pressure tank	100-200LN	2
4	Liquid level sensor of pressure tank	101-201MN	2
				5	Oil tank liquid level switch sensor	101SN-104SN	4
6	Pressure sensor of pressure tank	121-221MP	2
				7	Pressure switch sensor of pressure tank	101-102PS	2
8	Pressure gauge of pressure tank	100-200PG	2
				9	Safety valve for oil tank	100-200VQ	2
10	Oil-supplementing valve group	100RI	1
				11	Emergency air and oil supply device	102EL	1

Emergent tonifying qi oil supplementing system of hydraulic governor hydraulic system pressure vessel, as shown in fig. 2, includes:

the system comprises an oil tank YG, a sensor group a1, an air supply device 101EL, a controller a2, a man-machine interaction device a3, an oil supply valve group 100RI, an air pipe a4, an oil pipe a5, an electric circuit a6, a communication circuit a7, a supply tank BGG and a manual valve a 8;

the oil tank YG is a pressure oil tank;

the sensor group a1 includes a plurality of sensor units: a makeup tank pressure gauge 200PG, a makeup tank level gauge 200LN, a makeup tank level sensor 201MN, a pressure tank pressure sensor 221MP, and a pressure tank level gauge 100LN, a pressure tank level sensor 101MN, tank level switch sensors 101SN-104SN, pressure tank pressure switch sensors 101PS-102PS, a pressure tank pressure gauge 100PG, and a pressure tank pressure sensor 121 MP.

The sensor units respectively collect physical quantity parameters or state signals of an oil tank YG, a gas supplementing device 101EL, an oil supplementing valve group 100RI and a gas supplementing tank BGG in the hydraulic control system, such as: the pressure of the oil tank YG, the oil level of the oil tank YG, the opening and closing position of the air supply valve of the air supply device 101EL, the opening and closing position of the oil supply valve group 100RI, the pressure of the supply tank BGG, and the oil level of the supply tank BGG are transmitted to the controller a2 through an electrical circuit a 6.

The air supplement device 101EL receives an air supplement valve switch control command output to the air supplement device 101EL by the controller a2 through an electric circuit a6, and meanwhile, the sensor group a1 collects the position state of an air supplement valve switch of the air supplement device 101 EL;

the controller a2 receives control parameters of a hydraulic control system, such as an emergency air supplement liquid level, an emergency air supplement pressure, an emergency oil supplement pressure and the like, arranged by a man-machine interaction device a3 through a communication loop a7, and controls an emergency air supplement and oil supplement device of a hydraulic control system of the hydraulic turbine governor after logic processing is carried out by adopting an automatic emergency air supplement and oil supplement control method of the hydraulic control system of the hydraulic turbine governor according to a hydraulic control system state signal acquired by a sensor group a1 and received through an electric loop a6, and controls an air supplement valve of an air supplement device 101EL and an oil supplement valve group 100RI through an electric loop a6, and simultaneously transmits state information of the hydraulic control system to the man-machine interaction device a3 through a communication loop a 7;

the human-computer interaction device a3 communicates with the controller a2, and the user can control parameters of the hydraulic control system, such as the emergency air supplement liquid level H of the hydraulic control system, set by the human-computer interaction device a3_{Air supplement}Emergency air supply pressure P_{Air supplement}Emergency oil-supplementing pressure P_{Oil supplement}And the state information is transmitted to the controller a2, and meanwhile, the man-machine interaction device a3 acquires the state information of the hydraulic control system sent by the controller a2 and displays the state information graphically.

The oil replenishing valve set 100RI is located on the oil pipe a5, and when the oil tank YG needs oil replenishing, the oil replenishing valve set 100RI is manually or automatically opened.

A first air pipe is arranged between the supply tank BGG and the air supply device 101EL, and a second air pipe is arranged between the air supply device 101EL and the oil tank YG;

and a first oil pipe is arranged between the supply tank BGG and the oil supplementing valve group 100RI, a second oil pipe is arranged between the oil supplementing valve group 100RI and the oil tank YG, and the oil pipes are used for providing a pressure oil source to operate the guide vane opening actuating mechanism.

The sensor group a1 is connected with the controller a2 through an electric circuit a6, the air supply device 101EL is connected with the controller a2 through an electric circuit a6, and the electric circuit a6 is used for the oil supply valve group 100RI and the controller a2 to realize the transmission of state signals and control signals.

The controller a2 is connected with the man-machine interaction device a3 through a communication loop a7, and transmission of control parameters and state information of the hydraulic control system is achieved.

The supply tank BGG is used for storing a pressure container which is used for providing an emergency pressure air source and an oil source for the oil tank YG.

The system comprises a manual valve a8, a manual valve a8 is positioned on an oil pipe a5, and the manual valve a8 is opened manually when a pressure oil source is required to be provided by a hydraulic control system of the speed regulator to operate a guide vane opening degree actuating mechanism.

Controller a2 is a PLC controller model 140CPU67160, available from Schneider.

The human-computer interaction device a3 adopts a touch screen with the brand name Schneider and the model number XBTGT 7340.

The method is applied to the control of the automatic air and oil supply system for the emergency of the hydraulic control system of the speed regulator in the black start emergency state of a certain power station. The pressure of the gas tank of the system is 7Mpa, the rated pressure of the oil tank is 6.3Mpa, and P is_{Air supplement}6.18MPa, H_{Air supplement}Is 2000mm, P_{Oil supplement}Is 6.1 MPa. The method of the present invention will be described in detail below with reference to the examples.

The method for controlling the emergency automatic air and oil supply of the hydraulic control system of the hydraulic governor of the hydraulic turbine of a certain power station comprises the following detailed steps:

1. initializing a controller a2, detecting whether an emergency state exists, and if so, entering the steps 2 and 21; otherwise, continuing the detection.

2. The controller a2 detects whether the gulp valve is opened, if yes, step 12 is entered; otherwise, go to the next step.

3. And the hydraulic control system enters an emergency non-air-supply state and enters the next step.

4. The controller a2 detects whether the hydraulic control system is in the running state and automatically controls, if so, the next step is carried out; otherwise, step 3 is entered.

5. The controller a2 detects whether the oil tank pressure of the hydraulic control system is less than 6.18Mpa, if yes, the next step is carried out; otherwise, step 3 is entered.

6. The controller a2 detects whether the pressure of the oil tank of the hydraulic control system is larger than 2000mm, if yes, the next step is carried out; otherwise, step 3 is entered.

7. The controller a2 detects whether the oil tank pressure of the hydraulic control system is less than the pressure of the supply tank, if yes, the next step is carried out; otherwise, step 3 is entered.

8. The controller a2 detects whether the pressure and liquid level of the oil tank and the supply tank of the hydraulic control system have no fault alarm, if so, the next step is carried out; otherwise, step 3 is entered.

9. The hydraulic control system enters the opening process of the air compensating valve and then enters the next step.

10. The controller a2 sends an open and make-up valve control command to enter the next step.

11. The controller a2 detects whether the gulp valve is opened, if yes, the next step is carried out; otherwise, go to step 17.

12. And the hydraulic control system enters an emergency gas supplementing state and enters the steps 13, 18 and 19.

13. The controller a2 detects whether the air supply of the hydraulic control system lasts for 5 minutes, if yes, the next step is carried out; otherwise, continuing the detection.

14. The hydraulic control system enters the air supply closing process and then enters the next step.

15. The controller a2 sends out a control command of closing the gulp valve to enter the next step.

16. The controller a2 detects whether the gulp valve is closed, if yes, step 3 is entered; otherwise, step 20 is entered.

17. And (3) detecting whether the air compensating valve is not opened after being kept for 30 seconds by the controller a2, if so, reporting the failure fault of opening the air compensating valve, and entering the step 3, otherwise, entering the step 11.

18. The controller a2 detects whether the pressure and level sensors of the oil tank and the supply tank are in failure, if so, the step 14 is entered, otherwise, the step 2 is entered.

19. The controller a2 detects whether the air supply of the hydraulic control system lasts for 6 minutes, if yes, the controller reports an air supply overtime fault and enters the step 14, otherwise, the controller enters the step 2.

20. The controller a2 detects whether the gulp valve is not closed for 40 seconds, if yes, the failure fault of the gulp valve closing is reported, and the step 12 is entered, otherwise, the step 16 is entered.

21. The controller a2 detects whether the oil replenishing valve is opened, if yes, the step 30 is entered; otherwise, go to the next step.

22. And the hydraulic control system enters an emergency non-oil-supplementing state and enters the next step.

23. The controller a2 detects whether the hydraulic control system is in the running state and automatically controls, if so, the next step is carried out; otherwise, go to step 22.

24. The controller a2 detects whether the pressure of the oil tank of the hydraulic control system is less than 6.1Mpa, if yes, the next step is carried out; otherwise, go to step 22.

25. The controller a2 detects whether the oil tank pressure of the hydraulic control system is less than the pressure of the supply tank, if yes, the next step is carried out; otherwise, go to step 22.

26. The controller a2 detects whether the pressure and liquid level of the oil tank and the supply tank of the hydraulic control system have no fault alarm, if so, the next step is carried out; otherwise, go to step 22.

27. And the hydraulic control system enters the opening process of the oil replenishing valve and then enters the next step.

28. The controller a2 issues a make-and-break valve control command to the next step.

29. The controller a2 detects whether the oil replenishing valve is opened, if yes, the next step is carried out; otherwise, go to step 17.

30. And the hydraulic control system enters an emergency oil supplementing state and enters the steps 31, 18 and 19.

31. The controller a2 detects whether the oil supply of the hydraulic control system lasts for 5 minutes, if yes, the next step is carried out; otherwise, continuing the detection.

32. And the hydraulic control system enters an oil supplementing closing process and then enters the next step.

33. The controller a2 issues a control command to close the oil compensating valve, and the next step is performed.

34. The controller a2 detects whether the oil replenishing valve is closed, if yes, the step 22 is entered; otherwise, step 38 is entered.

35. And (3) detecting whether the oil replenishing valve is not opened for 30 seconds by the controller a2, if so, reporting the failure fault of the oil replenishing valve opening, and entering the step 22, otherwise, entering the step 29.

36. The controller a2 detects whether the pressure and level sensors of the oil tank and the supply tank are in failure, if so, the step 32 is entered, otherwise, the step 21 is entered.

37. And the controller a2 detects whether the oil supplement of the hydraulic control system lasts for 6 minutes, if so, reports an overtime fault of the oil supplement, and enters the step 32, otherwise, enters the step 21.

38. And (3) detecting whether the oil replenishing valve is not closed for 40 seconds by the controller a2, if so, reporting a failure fault of closing the oil replenishing valve, and entering the step 30, otherwise, entering the step 34.