Online guarantee system for hydraulic oil quality of hydraulic hoist in hydropower station and its control method

Abstract

The present invention relates to an on-line guarantee system for the quality of hydraulic oil of a hydraulic hoist in a hydropower station, which includes an oil return main pipe, an oil supply main pipe and an emergency oil main pipe. The oil return main pipe, the oil supply main pipe and the emergency oil main pipe are all connected to the oil tank of the hydraulic hoist through pressure hoses. The emergency oil main pipe is connected to an emergency oil sump, and an emergency oil pump is connected to the pipeline between the emergency oil main pipe and the emergency oil sump. The system further includes: an oil return system connected to the oil return main pipe, the oil return system including an oil return pump and an oil return tank, and the oil return pump being installed between the oil return tank and the oil return main pipe; an oil supply system connected to the oil supply main pipe, the oil supply system including an oil supply pump and a clean oil tank, and the oil supply pump being installed between the clean oil tank and the oil supply main pipe; and an oil filtering system connected between the oil return system and the oil supply system. The present invention can monitor the hydraulic oil of the hydraulic hoist in the hydropower station in real time, and replace and filter it in a timely manner, so as to ensure the stable and safe operation of the hydropower station.

Description

Technical Field

[0001] The present invention relates to the technical field of hydropower station operation, and particularly relates to an on-line guarantee system for the quality of hydraulic oil of a hydraulic hoist in a hydropower station and a control method thereof. Background Art

[0002] In water conservancy system projects, especially in hydropower stations, in order to ensure the safe operation of the power generation plant equipment, an emergency quick gate is provided at the water inlet part of the water diversion and power generation system. When the unit runs away, it can quickly cut off the water flow in moving water to handle or prevent major accidents such as flooding of the power house downstream of the water channel, thereby ensuring the safe operation of the power station house and equipment. In order to enable the emergency quick gate to quickly close the door in a short time, at present, the hydraulic hoist structure form is adopted to control the opening and closing of the emergency quick gate. Therefore, the safe and stable operation of the emergency quick gate is directly related to the safety of the power plant and the power station.

[0003] At the same time, in order to ensure the safe operation of the hydropower dam, a certain number of flood discharge holes are provided on the dam body. Usually, the working arc gate is used to block water. When the incoming water is large, the working arc gate needs to be opened for emergency flood discharge treatment to ensure that the water level in the power station reservoir area is controlled at a safe height and prevent the occurrence of overtopping accidents. Similarly, at present, the hydraulic hoist structure form is adopted to control the opening and closing of the flood discharge working arc gate. It can be seen that the safe and stable operation of the hydraulic hoist is directly related to the safe operation of the power plant and the power station. The key medium for the operation of the hydraulic hoist is hydraulic oil. If the quality of the hydraulic oil is not good, the spool of the hydraulic system actuator in the hydraulic hoist will have a phenomenon of refusal to move, which will affect the normal operation of the emergency equipment and the flood discharge equipment, making the equipment unable to play its due guarantee function at a critical moment and posing a major danger to the safe operation of the power station. Therefore, controlling the quality of the on-site hydraulic hoist oil is the key factor to ensure the safe operation of the hydraulic hoist.

[0004] For the on-site operating hydraulic hoist equipment, the main factors affecting the quality of hydraulic oil are oil particle size and moisture. The main means of controlling the quality of oil at present is to extract oil samples for manual inspection during the annual unit overhaul of the generator set. After it is checked that the particle size and moisture exceed the standard, the oil is filtered.

[0005] The existing method has the following disadvantages:

[0006] 1. The annual detection of the quality of hydraulic oil cannot timely detect the signs of oil deterioration.

[0007] 2. If it is detected that the oil quality is not good, it takes a long time to improve the oil quality. If the conventional particle size and water seal exceed the standard, it is necessary to move the oil filter equipment to the part of the oil equipment to be processed, and use the equipment fuel tank as a container to circulate and filter the oil. During this period, the oil sample is sent for manual inspection regularly until the oil test result is qualified. If it is detected that the oil has deteriorated, the unqualified oil needs to be pumped out of the hydraulic hoist fuel tank and stored with a temporary oil storage device. Then, the fuel tank and each actuator of the hydraulic system are cleaned. After the cleaning is completed, new oil (generally, the particle size will exceed the standard) is injected into the fuel tank. After the oil injection is completed, the fuel tank is used as a container to circulate and filter the oil. During this period, the oil sample is sent for manual inspection regularly until the oil test result is qualified. For emergency equipment, the above two treatment methods have a long shutdown time and there is a certain risk of safety hazards.

[0008] 3. The existing equipment does not have an emergency oil replenishment function. If an external leak occurs and the oil level in the fuel tank cannot meet the equipment operation requirement level, the hydraulic hoist system cannot work under extreme conditions. Summary of the Invention

[0009] In view of the deficiencies in the prior art, the present invention provides an on-line guarantee system for the hydraulic oil quality of a hydraulic hoist in a hydropower station. The system can monitor the oil quality status of the equipment in real time, provide decision-making data support for managers to maintain the oil, filter the particles and moisture in the oil, thereby improving the hydraulic oil quality, quickly replace the processed hydraulic oil into the operating equipment, quickly replenish the oil in the equipment fuel tank, and quickly drain the accident oil, thus ensuring the safe operation of the hydraulic hoist.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0011] The on-line guarantee system for the hydraulic oil quality of a hydraulic hoist in a hydropower station includes a return oil main pipe, a supply oil main pipe, and an accident oil main pipe. The return oil main pipe, the supply oil main pipe, and the accident oil main pipe are all connected to the fuel tank of the hydraulic hoist through pressure hoses. The accident oil main pipe is connected to an accident oil pool, and an accident oil pump is connected to the pipeline between the accident oil main pipe and the accident oil pool. It further includes a return oil system connected to the return oil main pipe. The return oil system includes a return oil pump and a return oil tank. The return oil pump is installed between the return oil tank and the return oil main pipe. A supply oil system connected to the supply oil main pipe. The supply oil system includes a supply oil pump and a clean oil tank. The supply oil pump is installed between the clean oil tank and the supply oil main pipe. And a filter oil system connected between the return oil system and the supply oil system.

[0012] In a preferred embodiment, the oil filtering system includes a water-vapor filtering unit and / or a particle filtering unit. The water-vapor filtering unit includes a vacuum container connected to the rear end of the oil return tank and a vacuum pump installed on the top of the vacuum container. An oil suction pump is connected between the vacuum container and the oil return tank. A heater is provided inside the vacuum container. An oil mist separator and an air filter are connected to the top of the vacuum container. A safety valve is also connected to the top of the vacuum container. The particle filtering unit includes a discharge pump connected to the rear end of the oil suction pump and a particle filter connected to the rear end of the discharge pump. One-way valves are connected to both the inlet and outlet of the particle filter.

[0013] In a preferred embodiment, the oil filtering system includes a particle filtering unit and a water-vapor filtering unit. The outlet of the oil suction pump is connected to the inlet of a three-position five-way directional control valve. The inlets and outlets of the water-vapor filtering system and the particle filtering unit are respectively connected to the remaining four ports of the three-position five-way directional control valve. When the three-position five-way directional control valve is in three valve positions, the water-vapor filtering system operates independently, the particle filtering unit operates independently, and the water-vapor filtering system and the particle filtering unit operate simultaneously are respectively achieved. The rear end of the particle filtering unit is connected to a clean oil tank and an oil return tank respectively through a two-position three-way directional control valve.

[0014] In a preferred embodiment, the oil return main pipe, the oil supply main pipe, and the emergency oil main pipe are connected in parallel to the oil tanks of multiple hydraulic hoists, and a normally open manual ball valve and a normally closed electric ball valve are connected to the pipelines between the oil return main pipe, the oil supply main pipe, the emergency oil main pipe and the oil tank of each hydraulic hoist.

[0015] In a preferred embodiment, air filters are connected to the tops of the oil return tank, the clean oil tank, and the vacuum container. An oil mist separator is also connected to the top of the vacuum container.

[0016] In a preferred embodiment, the bottom of the clean oil tank is connected to the emergency oil main pipe, and a normally closed electric ball valve and a normally open manual ball valve are connected to the pipeline between the clean oil tank and the emergency oil main pipe. The emergency oil main pipe is connected to an emergency oil pool, an emergency oil pump is connected between the emergency oil pool and the emergency oil main pipe, and a drain pump is connected to the rear end of the emergency oil pool.

[0017] In a preferred embodiment, a detection device is further provided at the lower part of the oil tank of the hydraulic hoist. The detection device includes one or a combination of a temperature sensor, a liquid level sensor, a moisture sensor, and a contamination sensor.

[0018] In a preferred embodiment, a local control unit is further included. The local control unit includes a local control cabinet. An electric control system and a PLC control system are installed inside the local control cabinet. The PLC control system is used to control the actions of the oil return pump, the oil suction pump, the vacuum pump, the oil supply pump, the emergency oil pump, the discharge pump, the drain pump, and the electric ball valve. Operating status indicator lights, a display screen, and control buttons are also provided on the local control cabinet.

[0019] In a preferred embodiment, it further includes a remote control unit. The remote control unit includes a server and a switch, and further includes a computer terminal and a wireless AP connected to the switch, as well as a mobile query terminal communicating with the wireless AP.

[0020] The present invention also provides a control method for an on-line guarantee system of the hydraulic oil quality of a hydraulic hoist in a hydropower station, including the following steps:

[0021] 1) Set the target values of the moisture, temperature, liquid level and contamination degree of the hydraulic oil of the hydraulic hoist. The detection device detects the moisture, temperature, liquid level and contamination degree of the oil in the hydraulic hoist fuel tank.

[0022] 2) Compare the detection result with the target value. If the oil is unqualified and the equipment is in the maintenance state, the system performs an oil return operation. After all the oil in the hydraulic hoist fuel tank is pumped into the oil return tank, start the oil supply operation for the hydraulic hoist fuel tank, supply the qualified hydraulic oil in the clean oil tank to the hydraulic hoist fuel tank, and stop the oil supply operation after the detection device detects that the liquid level of the oil in the hydraulic hoist fuel tank reaches the standard.

[0023] 3) Filter the oil pumped back into the oil return tank according to the detection result.

[0024] 4) When the detection result shows that the particle size of the oil exceeds the standard, start the independent operation of the particle filter unit: control the action of the on-way electric ball valve and the suction oil pump, and the three-position five-way valve acts to make the oil flowing in through the suction oil pump directly flow into the particle filter to complete the particle filtration, and then flow back into the oil return tank until the detection device at the bottom of the oil return tank detects that it reaches the standard and then stops running.

[0025] 5) When the detection result shows that the moisture or gas in the oil exceeds the standard, start the independent operation of the water-gas filter unit: control the action of the on-way electric ball valve, the suction oil pump and the vacuum pump, and the three-position five-way valve acts to make the oil flowing in through the suction oil pump directly flow into the vacuum tank to complete the filtration of moisture and gas, and then flow back into the oil return tank until the detection device at the bottom of the oil return tank detects that it reaches the standard and then stops running.

[0026] 6) When the detection result shows that both the particle size and the moisture or gas in the oil exceed the standard, start the comprehensive oil filtering operation: control the action of the on-way electric ball valve, the suction oil pump and the discharge pump, and the three-position five-way valve acts to make the oil flowing in through the suction oil pump first flow into the vacuum tank to complete the filtration of moisture and gas, then flow through the discharge pump into the particle filter to complete the particle filtration, and then flow back into the oil return tank until the detection device at the bottom of the oil return tank detects that it reaches the standard and then stops running.

[0027] 7) When the detection result shows that the liquid level of the oil in the hydraulic hoist fuel tank is lower than the set minimum liquid level, start the oil supply operation: control the action of the oil supply pump and the on-way electric ball valve, and transport the oil in the clean oil tank to the hydraulic hoist fuel tank until the liquid level of the oil reaches the standard.

[0028] 8) When the detection result indicates that the hydraulic oil has deteriorated and the equipment is in a maintenance state, start the oil drainage operation: start the emergency oil pump and the pipeline electric ball valves to quickly drain the deteriorated oil in the hydraulic hoist oil tank. After the maintenance personnel complete the cleaning of the hydraulic hoist oil tank and the accessories immersed in the deteriorated oil, supply oil as appropriate.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention can quickly replace the hydraulic oil that needs to be replaced and purified without long-term shutdown waiting for the oil treatment, greatly shortening the maintenance time, thus greatly saving the maintenance cost.

[0031] 2. The present invention can monitor the quality of the hydraulic oil in real time, and can detect and handle it in time when the quality of the hydraulic oil does not meet the standard. When dealing with it, first quickly replace the qualified oil, and then purify and filter the unqualified oil. The monitoring is timely and the filtering is efficient, ensuring the stable and reliable uninterrupted operation of the hydraulic hoist unit, and thus ensuring the safe, stable and efficient operation of the hydropower station.

[0032] 3. When the hydraulic oil level in the hydraulic hoist oil tank is insufficient, the present invention can detect and complete the oil supplement in time, avoiding unpredictable dangers and losses caused by the hoist working under extreme conditions.

[0033] 4. The present invention can remotely detect and monitor the oil state of the hoist, and perform corresponding processing according to different detection results, with excellent convenience and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the system structure of an embodiment of the present invention.

[0035] Figure 2 It is a schematic diagram of the system structure of the preferred embodiment of the present invention.

[0036] Figure 3 It is the system operation logic block diagram of the present invention.

[0037] In the above-mentioned attached drawings: 101, oil liquid detection device of the oil return tank; 1*1, oil liquid detection device of the equipment oil tank; 201, main oil return pipe; 202, main oil supply pipe; 203, accident oil main pipe; 2*1, *equipment oil return electric ball valve; 2*2, *equipment oil return manual ball valve; 2*3, *equipment oil return pipe electric ball valve; 2*4, *equipment oil supply electric ball valve; 2*5, *equipment oil supply manual ball valve; 2*6, *equipment oil supply pipe electric ball valve; 2*7, *equipment accident oil electric ball valve; 2*8, *equipment accident oil manual ball valve; 2*9, *equipment accident oil pipe electric ball valve; 301, manual ball valve at the inlet of the oil return pump; 302, manual ball valve at the outlet of the oil return pump; 303, electric ball valve at the oil suction port of the oil filter; 304, manual ball valve at the oil suction port of the oil filter; 305, vent ball valve of the vacuum container; 306, electric ball valve at the oil return port of the oil filter; 307, manual ball valve at the oil return port of the oil filter; 308, manual ball valve for pouring oil; 309, manual ball valve at the oil suction port of the oil supply; 310, electric ball valve at the oil suction port of the oil supply; 311, manual ball valve for oil supply; 312, vent ball valve of the oil return tank; 313, manual ball valve for accident oil of the oil return tank; 314, electric ball valve for accident oil; 315, vent ball valve of the clean oil tank; 316, manual ball valve for accident oil of the clean oil tank; 317, electric ball valve for accident oil of the clean oil tank; 318, manual ball valve at the oil suction port of the accident oil; 319, manual ball valve at the oil suction port of the oil drainage of the accident oil pool; 320, electric ball valve at the oil suction port of the oil drainage of the accident oil pool; 321, manual ball valve at the oil outlet of the oil drainage of the accident oil pool; 322, electric ball valve at the oil outlet of the oil drainage of the accident oil pool; 401, oil return pump; 402, oil suction pump; 403, vacuum pump; 404, discharge pump; 405, oil supply pump; 406, accident oil pump; 407, vent pump; 501, oil return tank; 502, clean oil tank; 503, air filter of the oil return tank; 504, visible liquid level gauge of the oil return tank; 505, air filter of the clean oil tank; 506, visible liquid level gauge of the clean oil tank; 507, accident oil pool; 601, oil suction filter; 602, shock absorber hose; 603, overflow valve of the oil suction pump; 604, check valve at the outlet of the oil suction pump; 605, vacuum container; 606, heater; 607, digital display sensor; 608, pointer mechanical pressure gauge; 609, thermometer; 610, safety valve; 611, air filter of the vacuum container; 612, oil mist separator; 613, visible liquid level gauge of the vacuum container; 614, overflow valve of the discharge pump; 615, three-position five-way directional control valve; 616, check valve at the inlet of the particle filter; 617, particle filter; 618, differential pressure transmitter; 619, vent ball valve at the outlet of the particle filter; 620, check valve at the outlet of the particle filter; 621, two-position three-way directional control valve; 7, local control cabinet; 7-1, indicator light; 7-2, PLC control system; 7-3, touch screen; 7-4, control button; 7-5, electric control system; 71, server; 72, switch; 73, wireless AP; 74, mobile query terminal; 75, computer terminal. Detailed implementation manners

[0038] The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] In the graphic description of the present invention, * represents the equipment number of the connected hydraulic hoist, and the corresponding reference numeral represents the component corresponding to the equipment with that number. For example, when 3 hydraulic hoists are connected in this embodiment, the equipment return oil manual ball valves corresponding to the 3 hoists are numbered 212, 222, and 232 respectively; in the following description, for the sake of standard and popular understanding according to the professional descriptions in the hydraulic and electrical fields, the electric valves and pumps involved in the system in the present invention are numbered to facilitate understanding of the system operation status through an intuitive electrical action table. The specific numbers are shown in the following table:

[0040]

[0041]

[0042] In addition, the front end mentioned in the present invention refers to the upstream of the component in question, and the lower end refers to the downstream of the component in question, but it does not mean that there are no other components connected between the component and the components at the front end or the rear end; the valve filled with black indicates that the initial position is fully closed, and the valve not filled indicates that the initial position is fully open.

[0043] Embodiment 1

[0044] Refer to the attached Figure 1, as an embodiment of the present invention, an on-line guarantee system for the quality of hydraulic oil of a hydraulic hoist in a hydropower station is proposed. It includes an oil return main pipe 201, an oil supply main pipe 202, and an emergency oil main pipe 203. The oil return main pipe 201, the oil supply main pipe 202, and the emergency oil main pipe 203 are all connected to the oil tank of the hydraulic hoist through pressure hoses 2*10, and can be arranged and installed on the side wall of the passage along the operating equipment. For each hoist to be detected, corresponding valves 2*1 - 2*9 and three quick-connect hoses 2*10 are installed according to the position of the on-site equipment, so as to enable the device to be quickly connected to the existing operating equipment and achieve the versatility of the device of the present invention; the emergency oil main pipe 203 is connected to the emergency oil tank 507, and an emergency oil pump 407 is connected to the pipeline between the emergency oil main pipe 203 and the emergency oil tank 507. An emergency oil suction port manual ball valve 318 is installed between the emergency oil pump 407 and the emergency oil main pipe 203. An emptying pump 307 is installed at the rear end of the emergency oil tank. An emergency oil tank drain oil suction port manual ball valve 319 and an emergency oil tank drain oil suction port electric ball valve 320 are installed on the pipeline between the emptying pump 307 and the emergency oil tank 407. An emergency oil tank drain oil outlet manual ball valve 321 and an emergency oil tank drain oil outlet electric ball valve 322 are installed at the rear end of the emptying pump 307; it further includes: an oil return system connected to the oil return main pipe 201, the oil return system includes an oil return pump 401 and an oil return tank 501. An oil return tank emptying ball valve 312 is installed at the bottom of the oil return tank 501. The oil return pump 401 is installed between the oil return tank 501 and the oil return main pipe 201. An oil return pump inlet manual ball valve 301 is installed at the inlet of the oil return pump 401, and an oil return pump outlet manual ball valve 302 is installed at its outlet. The bottom of the oil return tank 501 is connected to the emergency oil main pipe 203, and an oil return tank emergency oil manual ball valve 313 and an emergency oil electric ball valve 314 are installed on this pipe section; an oil supply system connected to the oil supply main pipe 202, the oil supply system includes an oil supply pump 405 and a clean oil tank 502. A clean oil tank emptying ball valve 315 is installed at the bottom of the clean oil tank 502. The oil supply pump 405 is installed between the clean oil tank 502 and the oil supply main pipe 202. A discharge pump overflow valve 614 is installed at the oil supply pump 405. The clean oil tank 502 is connected to the emergency oil main pipe 203, and a clean oil tank emergency oil manual ball valve 316 and a clean oil tank emergency oil electric ball valve 317 are installed on this pipe section; and an oil filtering system connected between the oil return system and the oil supply system;The oil filtering system includes a water-vapor filtering unit. The water-vapor filtering unit includes a vacuum container 605 connected to the rear end of the oil return tank 501 and a vacuum pump 403 installed on the top of the vacuum container 605, so as to form a vacuum or near-vacuum state in the vacuum container 605. This facilitates the separation of air from the oil, quickly separates the gas in the oil, and a suction oil pump 402 is connected between the vacuum container 605 and the oil return tank 501. An oil suction filter 601 is installed at the inlet of the suction oil pump 402, and an electric ball valve 303 for oil filtering and oil suction port and a manual ball valve 304 for oil filtering and oil suction port are installed at the inlet of the suction oil pump to preliminarily filter the oil. To reduce system vibration, a shock-absorbing hose 602 is connected to the upper end of the suction oil pump. An overflow valve 603 for the suction oil pump is also installed at the suction oil pump 402, and a check valve 604 for the outlet of the suction oil pump is installed at the rear end of the suction oil pump 402. A pointer mechanical pressure gauge 608 and a thermometer 609 are connected to the vacuum container 605, and a visible liquid level gauge 613 for the vacuum container is installed outside the vacuum container 605 to monitor the state inside the vacuum container 605. A heater 606 is arranged inside the vacuum container 605 to accelerate the volatilization and precipitation of air in the oil. An oil mist separator 612 and an air filter 611 are connected to the top of the vacuum container 605. A safety valve 610 is also connected to the top of the vacuum container 605. To facilitate observing the liquid levels in the oil return tank 501 and the clean oil tank 502, a visible liquid level gauge 504 for the oil return tank is installed outside the oil return tank 501, and a visible liquid level gauge 506 for the clean oil tank is installed outside the clean oil tank 502. A vent ball valve 305 for the vacuum container is connected to the bottom of the vacuum container 605.;

[0045] In the traditional operation mode, the hoist is regularly overhauled once a year. If it is detected that the oil quality is not good, the oil is pumped out for improvement, but the time taken to improve the oil quality is relatively long. If the conventional particle size and water seal exceed the standard, it is necessary to move the oil filtering equipment to the location of the oil equipment to be processed, and use the equipment fuel tank as a container to circulate and filter the oil. During this period, the oil samples are regularly sent for manual inspection until the oil test results are qualified.

[0046] After this embodiment is used, it can be detected irregularly. When the oil quality is detected to be unqualified, the unqualified oil can be quickly pumped out, and then qualified oil can be replenished. The time required to improve the oil quality is short, and the impact on normal operation is small.

[0047] Embodiment 2

[0048] Refer to the appendix Figure 1 - Appendix Figure 3As a preferred embodiment of the present invention, on the basis of embodiment 1, the oil filter system includes a particle filter unit and a water vapor filter unit, the particle filter unit includes a discharge pump 404 connected to the rear end of the oil suction pump 402 and a particle filter 617 connected to the rear end of the discharge pump 404, the inlet of the particle filter 617 is connected to the particle filter inlet check valve 616, the outlet is connected to the particle filter outlet check valve 620 and the particle filter outlet vent ball valve 619, and a pressure differential transmitter 618 is installed on the pipeline where the particle filter 617 is located to monitor the pressure at the front and rear ends of the particle filter 617. The outlet of the oil suction pump 402 is connected to the inlet of the three-position five-way reversing valve 615, and the inlet and outlet of the water vapor filtration system and the particle filter unit are respectively connected to the remaining four ports of the three-position five-way reversing valve 615, so that when the three-position five-way reversing valve 615 is in three valve positions, the water vapor filtration system is operated alone, the particle filter unit is operated alone, and the water vapor filtration system and the particle filter unit are operated simultaneously; the rear end of the particle filter unit is connected to the clean oil tank 502 and the return oil tank 501 respectively through the two-position three-way reversing valve 621, and the filter oil return tank 501 is installed on the pipeline between the particle filter unit and the return oil tank 501. The oil inlet electric ball valve 306 and the oil filter return port manual ball valve 307, the oil pouring manual ball valve 308 is installed on the pipeline between the particle filter unit and the clean oil tank 502, the oil supply suction port manual ball valve 309 and the oil supply suction port electric ball valve 310 are connected between the clean oil tank 502 and the oil supply pump 405, and the oil supply manual ball valve 311 is installed between the oil supply pump 405 and the oil supply main pipe 202; the oil tanks of the hydraulic hoists connected in parallel on the return oil main pipe 201, the supply oil main pipe 202 and the accident oil main pipe 203, and the pressure hoses 2*10 between the return oil main pipe 201 and the oil tank of each hydraulic hoist The top is connected with a normally open equipment oil return manual ball valve 2*2, and a normally closed equipment oil return pipe electric ball valve 2*3; the pipeline between the oil supply main pipe 202 and the oil tank of each hydraulic gate opener is connected with a normally open equipment oil supply manual ball valve 2*5, and a normally closed equipment oil supply electric ball valve 2*4; the top of the return oil tank 501 is connected to the return oil tank air filter 503, the top of the clean oil tank 502 is connected to the clean oil tank air filter 505, the top of the vacuum container 605 is connected to the vacuum container air filter 611, and the top of the vacuum container 605 is also connected to an oil mist separator 612.

[0049] In this embodiment, it further includes an equipment oil tank fluid detection device 1*1 installed at the lower part of the oil tank of the hydraulic hoist. The equipment oil tank fluid detection device 1*1 includes a temperature sensor, a liquid level sensor, a moisture sensor, and a contamination sensor. A return oil tank fluid detection device 101 is installed at the bottom of the return oil tank 501; at the same time, it also includes a local control unit and a remote control unit. The local control unit includes a local control cabinet 7. An electric control system 7-5 and a PLC control system 7-2 are installed in the local control cabinet 7. The PLC control system 7-2 is used to control the actions of the return oil pump 401, the suction oil pump 402, the vacuum pump 403, the discharge pump 404, the oil supply pump 405, the emergency oil pump 406, the drain pump 407, and the electric ball valve. Operation status indicators 7-1, a display screen 7-3, and control buttons 7-4 are also provided on the local control cabinet 7; the remote control unit includes a server 71 and a switch 72, and further includes a computer terminal 75 and a wireless AP 73 connected to the switch 72, and a mobile query terminal 74 communicating with the wireless AP 73.

[0050] During the human-machine control process, after the data detected by the detection device is analyzed and processed by the PLC control system, corresponding execution action instructions are output, so as to control the effective execution of each component of the device of the present invention.

[0051] The valves involved in the present invention include valves 301-323 along the system pipeline and main pipeline valves 2*1-2*9, which are used to block the on-off of the oil circuit, so as to control the operation and treatment of the oil in the equipment oil tank as needed. They include manual ball valves (code name SF), electric ball valves (code name DF), and drain ball valves (code name FK). Among them, the manual ball valve is mainly used to block the system oil circuit under the maintenance condition, creating conditions for maintenance personnel to maintain the equipment. The electric ball valve is used to connect or disconnect the system oil circuit under the operating condition of the device, and can conduct the connection between the equipment oil tank to be operated and the system device, realizing the improvement of the oil quality in the equipment oil tank. The drain ball valve is installed at the bottom of the oil storage equipment and is used to drain the oil in the container.

[0052] The oil pump involved in the present invention is the main power source of the present invention, which is used to pump, supply, and discharge the oil fluid in the device, so as to realize the safe operation of the oil fluid in the device as required. Among them, the return oil pump 401 is installed at the front end of the return oil tank 501 of the system device, and can pump the substandard oil fluid in the equipment oil tank back into the return oil tank 501. The suction oil pump 402 is installed at the oil inlet part of the filtering equipment of the system device, and provides the suction oil power for the device. The vacuum pump 403 is installed on the top of the vacuum container 605 of the device, and can dehydrate and degas the oil fluid in a vacuum. The discharge pump 404 is installed at the front end of the return oil filter of the system device, and provides the power source for the oil fluid filtration of the system device. The oil supply pump 405 is installed at the rear end of the clean oil tank 502, and can supply the qualified oil fluid in the clean oil tank 502 back into the equipment oil tank. The accident oil pump 406 is installed at the front end of the accident oil pool 507, and can pump and discharge the accident oil fluid in the equipment oil tank into the accident oil pool 507. The vent pump 407 is installed at the rear end of the accident oil pool 507, and is used to pump and discharge the accident oil fluid in the accident oil pool 507 into the outdoor transfer container, which is convenient for transfer to the hazardous chemicals warehouse for centralized treatment.

[0053] The oil tank involved in the present invention is the main oil storage equipment of the device of the present invention. The volume of a single oil tank is 1.5 times that of the equipment oil tank, and it includes a return oil tank 501 and a clean oil tank 502. A visual liquid level gauge is installed on the side of the oil tank, and an air filter is installed on the top. The return oil tank 501 is used to store the substandard oil fluid pumped back from the equipment oil tank, and the clean oil tank 502 is used to store the oil fluid qualified after being processed by the device filtration system.

[0054] When the system in the present invention processes the oil fluid, it includes return oil treatment, oil filtration treatment, oil supply treatment, and accident oil discharge treatment; according to the detection results of the detection device 1*1, the equipment in the maintenance state can be subjected to return oil treatment, and the qualified oil fluid in the clean oil tank can be quickly replaced into the equipment oil tank; the system can process the substandard oil fluid in the return oil tank 501 as required according to the detection results of the detection device 101. This system can perform single-item dehydration and degassing treatment, single-item particle filtration treatment, and comprehensive oil filtration treatment on the oil fluid, and then transfer the processed qualified oil fluid to the clean oil tank 502 for standby; at the same time, the system can quickly supplement the oil fluid with an unqualified liquid level in the equipment oil tank, and can also quickly perform timely oil discharge treatment on the deteriorated oil fluid.

[0055] The specific control method includes the following steps:

[0056] 1) Set the target values of the moisture, temperature, liquid level, and contamination degree of the oil fluid of the hydraulic hoist. The detection device detects the moisture, temperature, liquid level, and contamination degree of the oil fluid in the hydraulic hoist fuel tank.

[0057] 2) Compare the detection result with the target value. If the oil fluid is unqualified and the equipment is in the maintenance state, the system performs an oil return operation. After all the oil fluid in the hydraulic hoist oil tank is pumped into the oil return tank, start supplying oil to the hydraulic hoist oil tank, supply the qualified hydraulic oil in the clean oil tank to the hydraulic hoist oil tank, and stop the oil supply operation after the detection device detects that the oil fluid level in the hydraulic hoist oil tank reaches the standard;

[0058] 3) Filter the oil fluid pumped back into the oil return tank according to the detection result;

[0059] 4) When the detection result shows that the oil fluid particle size exceeds the standard, start the particle filtration unit to run alone: control the on-way electric ball valve and the suction oil pump to act, and the three-position five-way valve acts to make the oil fluid flowing in through the suction oil pump directly flow into the particle filter to complete particle filtration and then flow back into the oil return tank until the detection device at the bottom of the oil return tank detects that it meets the standard and then stops running;

[0060] 5) When the detection result shows that the water content or gas content of the oil fluid exceeds the standard, start the water and gas filtration unit to run alone: control the on-way electric ball valve, the suction oil pump and the vacuum pump to act, and the three-position five-way valve acts to make the oil fluid flowing in through the suction oil pump directly flow into the vacuum tank to complete water and gas filtration and then flow back into the oil return tank until the detection device at the bottom of the oil return tank detects that it meets the standard and then stops running;

[0061] 6) When the detection result shows that both the oil fluid particle size and the water content or gas content exceed the standard, start the comprehensive oil filtration operation: control the on-way electric ball valve, the suction oil pump and the discharge pump to act, and the three-position five-way valve acts to make the oil fluid flowing in through the suction oil pump first flow into the vacuum tank to complete water and gas filtration, then flow through the discharge pump into the particle filter to complete particle filtration, and then flow back into the oil return tank until the detection device at the bottom of the oil return tank detects that it meets the standard and then stops running;

[0062] 7) When the detection result shows that the oil fluid level in the hydraulic hoist oil tank is lower than the set minimum level, start the oil supply operation: control the oil supply pump and the on-way electric ball valve to act, and transport the oil fluid in the clean oil tank to the hydraulic hoist oil tank until the oil fluid level reaches the standard;

[0063] 8) When the detection result shows that the oil fluid has deteriorated and the equipment is in the maintenance state, start the oil discharge operation: start the emergency oil pump and the on-way electric ball valve, and quickly empty the deteriorated oil fluid in the hydraulic hoist oil tank. After the maintenance personnel complete the cleaning of the hydraulic hoist oil tank and the accessories immersed in the deteriorated oil fluid, perform the oil supply operation at an appropriate time.

[0064] In the above control process, under different operation modes, the system electrical action table is shown in the following table:

[0065] System Electrical Action Table

[0066]

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. Online guarantee system for hydraulic oil quality of hydraulic hoist in hydropower station, which includes return oil main pipe, oil supply main pipe and emergency oil main pipe, characterized in that, The oil return main pipe, the oil supply main pipe, and the emergency oil main pipe are all connected to the oil tank of the hydraulic hoist through pressure hoses. The emergency oil main pipe is connected to the emergency oil sump, and an emergency oil pump is connected to the pipeline between the emergency oil main pipe and the emergency oil sump. It further includes: an oil return system connected to the oil return main pipe. The oil return system includes an oil return pump and an oil return tank, and the oil return pump is installed between the oil return tank and the oil return main pipe; An oil supply system connected to the oil supply main pipe. The oil supply system includes an oil supply pump and a clean oil tank, and the oil supply pump is installed between the clean oil tank and the oil supply main pipe; and An oil filtering system connected between the oil return system and the oil supply system. The oil filtering system includes a water and gas filtering unit and a particle filtering unit. The water and gas filtering unit includes a vacuum container connected to the rear end of the oil return tank and a vacuum pump installed on the top of the vacuum container. An oil suction pump is connected between the vacuum container and the oil return tank. A heater is provided in the vacuum container. An oil mist separator and an air filter are connected to the top of the vacuum container. A safety valve is also connected to the top of the vacuum container; The particle filtering unit includes a discharge pump connected to the rear end of the oil suction pump and a particle filter connected to the rear end of the discharge pump. One-way valves are connected to both the inlet and outlet of the particle filter; The outlet of the oil suction pump is connected to the inlet of a three-position five-way directional control valve. The inlets and outlets of the water and gas filtering unit and the particle filtering unit are respectively connected to the remaining four ports of the three-position five-way directional control valve. When the three-position five-way directional control valve is in three valve positions, the water and gas filtering unit operates independently, the particle filtering unit operates independently, and the water and gas filtering unit and the particle filtering unit operate simultaneously are respectively realized; the rear end of the particle filtering unit is connected to the clean oil tank and the oil return tank respectively through a two-position three-way directional control valve.

2. The on-line guarantee system for the hydraulic oil quality of the hydraulic hoist of a hydropower station according to claim 1, characterized in that: The oil return main pipe, the oil supply main pipe, and the emergency oil main pipe are connected to the oil tanks of multiple hydraulic hoists in parallel, and a normally open manual ball valve and a normally closed electric ball valve are connected to the pipelines between the oil return main pipe, the oil supply main pipe, the emergency oil main pipe and the oil tank of each hydraulic hoist.

3. The on-line guarantee system for the quality of hydraulic oil of the hydraulic hoist of a hydropower station according to claim 2, characterized in that: An air filter is connected to the top of the oil return tank, the clean oil tank, and the vacuum container. An oil mist separator is also connected to the top of the vacuum container.

4. The on-line guarantee system for the quality of hydraulic oil of the hydraulic hoist of a hydropower station according to claim 1, characterized in that: The bottom of the clean oil tank is connected to the emergency oil main pipe, and a normally closed electric ball valve and a normally open manual ball valve are connected to the pipeline between the clean oil tank and the emergency oil main pipe. The emergency oil main pipe is connected to the emergency oil sump, an emergency oil pump is connected to the pipeline between the emergency oil sump and the emergency oil main pipe, and a drain pump is connected to the rear end of the emergency oil sump.

5. The online hydraulic oil quality guarantee system for a hydropower station hydraulic hoist according to claim 3 further includes a detection device provided at the lower part of the oil tank of the hydraulic hoist. The detection device includes one or a combination of a temperature sensor, a liquid level sensor, a moisture sensor, and a contamination sensor.

6. The online hydraulic oil quality guarantee system for a hydropower station hydraulic hoist according to claim 1 is characterized in that: It also includes a local control unit, which includes a local control cabinet. An electric control system and a PLC control system are installed in the local control cabinet. The PLC control system is used to control the actions of the return oil pump, suction oil pump, vacuum pump, oil supply pump, emergency oil pump, discharge pump, vent pump, and electric ball valve. Operation status indicator lights, a display screen, and control buttons are also provided on the local control cabinet.

7. The on-line guarantee system for the quality of hydraulic oil of the hydraulic hoist of a hydropower station according to claim 1, characterized in that: It further includes a remote control unit, which includes a server and a switch, as well as a computer terminal and a wireless AP connected to the switch, and a mobile query terminal communicating with the wireless AP.

8. The control method of the on-line guarantee system for the hydraulic oil quality of the hydraulic hoist of a hydropower station according to any one of claims 1-7, characterized in that, It includes the following steps: 1) Set the target values of the moisture, temperature, liquid level, and contamination degree of the hydraulic hoist oil. The detection device detects the moisture, temperature, liquid level, and contamination degree of the oil in the hydraulic hoist oil tank. 2) Compare the detection results with the target values. If the oil is unqualified and the equipment is in the maintenance state, the system performs an oil return operation. After all the oil in the hydraulic hoist oil tank is pumped into the oil return tank, start supplying oil to the hydraulic hoist oil tank. Supply the qualified hydraulic oil in the clean oil tank to the hydraulic hoist oil tank, and stop the oil supply operation after the detection device detects that the liquid level of the oil in the hydraulic hoist oil tank reaches the standard. 3) Filter the oil pumped back into the oil return tank according to the detection results. 4) When the detection result shows that the oil particle size exceeds the standard, start the particle filtration unit to operate independently: control the action of the in-line electric ball valve and the suction oil pump, and the three-position five-way valve acts to make the oil flowing in through the suction oil pump directly flow into the particle filter to complete particle filtration, and then flow back into the oil return tank until the detection device at the bottom of the oil return tank detects that it meets the standard and then stops running. 5) When the detection result shows that the moisture or gas in the oil exceeds the standard, start the water and gas filtration unit to operate independently: control the action of the in-line electric ball valve, the suction oil pump, and the vacuum pump, and the three-position five-way valve acts to make the oil flowing in through the suction oil pump directly flow into the vacuum tank to complete the filtration of moisture and gas, and then flow back into the oil return tank until the detection device at the bottom of the oil return tank detects that it meets the standard and then stops running. 6) When the detection result shows that both the oil particle size and the moisture or gas exceed the standard, start the comprehensive oil filtration operation: control the action of the in-line electric ball valve, the suction oil pump, and the discharge pump, and the three-position five-way valve acts to make the oil flowing in through the suction oil pump first flow into the vacuum tank to complete the filtration of moisture and gas, then flow through the discharge pump into the particle filter to complete particle filtration, and then flow back into the oil return tank until the detection device at the bottom of the oil return tank detects that it meets the standard and then stops running. 7) When the detection result shows that the liquid level of the oil in the hydraulic hoist oil tank is lower than the set minimum liquid level, start the oil supply operation: control the action of the oil supply pump and the in-line electric ball valve, and transport the oil in the clean oil tank to the hydraulic hoist oil tank until the liquid level of the oil reaches the standard. 8) When the detection result shows that the oil has deteriorated and the equipment is in the maintenance state, start the oil drainage operation: start the emergency oil pump and the in-line electric ball valve, and quickly drain the deteriorated oil in the hydraulic hoist oil tank. After the maintenance personnel complete the cleaning of the hydraulic hoist oil tank and the accessories immersed in the deteriorated oil, perform the oil supply operation at an appropriate time.

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