Intelligent purification system and unit oil change system for turbine oil in hydropower station and operation method thereof

Abstract

The invention relates to an intelligent purification system and an intelligent oil change system for turbine oil of a hydropower station and an operation method thereof, belonging to the field of hydropower generation. The invention solves the problem that the existing turbine oil system has complicated oil filling and discharge and oil purification processes, and the quality of purified oil cannot be reliably guaranteed. Each operating oil tank and each purified oil tank of the invention are respectively connected to the turbine oil accident oil pool through a first connecting pipe, a second connecting pipe is arranged on the first connecting pipe, the second connecting pipe is connected to the main oil supply pipe, the operating oil tank and the purified oil tank are respectively connected to the main oil supply pipe through a third connecting pipe, the operating oil tank and the purified oil tank are respectively connected to the first collecting pipe through a fourth connecting pipe, the first collecting pipe is connected to the main oil discharge pipe, a first branch pipe is arranged on the first collecting pipe, a vacuum oil filter is connected to the first branch pipe through a pipeline, and the vacuum oil filter is connected to the main oil supply pipe through a fifth connecting pipe. The turbine oil purification and oil change system of the invention simplifies the operation process of the turbine oil system, improves the oil quality of purified oil, and shortens the maintenance time of the unit.

Description

Technical Field

[0001] The present invention belongs to the field of hydropower generation, and in particular relates to a hydropower station turbine oil intelligent purification and unit oil change system and an operation method. Background Art

[0002] The load and loss of each guide bearing and thrust bearing of the high-head and large-capacity hydropower station are relatively large, which leads to the deterioration speed of the turbine oil of the unit faster than that of general hydropower stations. Therefore, the operation of the oil filling, draining and oil purification process of the turbine oil system is also more frequent. The traditional oil filling, draining and oil purification process of the turbine oil system is quite cumbersome. The main processes are: filling the operating oil tank, self-circulating fine filtration of the operating oil, oil purification from the operating oil tank to another operating oil tank, storing the operating oil tank in the clean oil tank, filling the unit with oil from the clean oil tank, oil drainage during unit maintenance, pipeline flushing, accidental oil drainage, etc. The general design idea is: 4 oil filling and drainage main pipes are set in the turbine oil tank room for the oil filling and drainage interfaces of the operating oil tank and the clean oil tank, each oil tank interface is rigidly connected to the corresponding main pipe, and then many quick connectors are set on the main pipe. According to the function to be performed, the steel wire hose is used to connect the main pipe quick connector and the corresponding oil purification equipment, and then some manual valves are turned on and off, and the oil purification equipment is operated to complete the oil filling, draining or oil purification procedures.

[0003] The shortcomings of traditional design ideas are quite obvious. The operation process of the turbine oil system is quite complicated and there are about ten kinds of operation processes. Even if the equipment is connected according to the operating system diagram, there is still a risk of misconnection and missed connection, which may cause safety accidents. In addition, there is no standardized evaluation standard for the purification process between oil tanks. It only tells how many cycles the oil filter has been purified, but does not know the final oil quality, nor does it know whether the turbine oil after purification meets the technical requirements of L-TSA46# turbine oil. In addition, the process of filling the unit with oil from the turbine oil system usually requires multiple people to operate, and they work together to operate the equipment and observe the oil level in the bearing oil tank. The net filling and oil discharge process is extremely inconvenient, and the oil quality after oil purification is not reliably guaranteed. Therefore, a new hydropower station turbine oil intelligent purification and unit intelligent oil change system is needed to solve the above problems.

[0004] Therefore, the present invention proposes a hydropower station turbine oil intelligent purification and unit intelligent oil change system that simplifies system operation, ensures turbine oil quality, shortens unit maintenance time, and maintains stable operation of unit bearings. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing turbine oil system has complicated oil filling and draining and oil purification processes, and the quality of the purified oil cannot be reliably guaranteed. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0006] The technical solution of the present invention:

[0007] Solution 1: Intelligent purification system for turbine oil and intelligent oil change system for units in hydropower stations, including an operating oil tank group, a clean oil tank group, a turbine oil accident oil pool, a vacuum oil filter, a main oil drain pipe and a main oil supply pipe. The operating oil tank group includes multiple operating oil tanks, and the clean oil tank group includes multiple clean oil tanks. Each operating oil tank and each clean oil tank are respectively connected to the turbine oil accident oil pool through a first connecting pipe, a second connecting pipe is provided on the first connecting pipe, the second connecting pipe is connected to the main oil supply pipe, the operating oil tank and the clean oil tank are respectively connected to the main oil supply pipe through a third connecting pipe, the operating oil tank and the clean oil tank are respectively connected to the first collecting pipe through a fourth connecting pipe, the first collecting pipe is connected to the main oil drain pipe, a first branch pipe is provided on the first collecting pipe, the vacuum oil filter is connected to the first branch pipe through a pipeline, and the vacuum oil filter is connected to the main oil supply pipe through a fifth connecting pipe.

[0008] Furthermore, it also includes an oil return tank, an upper guide, a derivation combined bearing and a water guide. The upper guide is connected to the main oil supply pipe through a sixth connecting pipe, and the upper guide is connected to the main oil drain pipe through a seventh connecting pipe. The oil return tank, the derivation combined bearing and the water guide are respectively connected to the sixth connecting pipe and the seventh connecting pipe through pipelines. The main oil drain pipe and the main oil supply pipe are respectively provided with oil flow meters. The oil return tank, the upper guide, the derivation combined bearing and the water guide are provided with liquid level transmitters. The main oil drain pipe is connected to the main oil supply pipe.

[0009] Furthermore, an oil pump is provided on the seventh connecting pipe, and valves are provided at both ends of the oil pump.

[0010] Furthermore, a fixed oil pump is connected in parallel to the main oil supply pipe.

[0011] Furthermore, the second connecting pipe and the fourth connecting pipe of the operating oil tank group are respectively provided with oil product sensors, and the third connecting pipe and the fourth connecting pipe of the clean oil tank group are respectively provided with oil product sensors.

[0012] Furthermore, valves are respectively provided on the first connecting pipe, the second connecting pipe, the third connecting pipe, the fourth connecting pipe, the fifth connecting pipe, the sixth connecting pipe and the seventh connecting pipe.

[0013] Solution 2: An operation method of the intelligent purification system of turbine oil and intelligent oil change system of the hydropower station described in Solution 1, including filling the operating oil tank, self-circulating fine filtration of the operating oil, storing the clean oil of the operating oil tank in the clean oil tank, filling the unit with oil from the clean oil tank, draining the oil during unit maintenance, and flushing the pipeline;

[0014] The oil filling of the operating oil tank is specifically as follows: opening the valve of the fourth connecting pipe of each operating oil tank of the operating oil tank group, connecting the first manifold with the oil truck, opening the oil discharge valve of the oil truck, opening the valve on the first manifold, closing the valve between the first manifold and the clean oil tank group, and injecting the turbine oil into each turbine oil tank of the turbine oil tank group by gravity flow;

[0015] The self-circulating fine filtration of the operating oil is specifically as follows: the valves of the second connecting pipe and the fourth connecting pipe of each operating oil tank of the operating oil tank group are opened, the valves of the first branch pipe and the fifth connecting pipe are opened, and the vacuum oil filter is started, so that one of the operating oil tanks in the operating oil tank group forms an oil circuit circulation, and the oil quality index of the turbine oil is monitored in real time through the oil quality sensor on the second connecting pipe and the fourth connecting pipe of each operating oil tank. When the monitoring data of the oil quality sensor meets the relevant index of the turbine oil, the vacuum oil filter is turned off, and then the valves on the second connecting pipe, the fourth connecting pipe, the first branch pipe and the fifth connecting pipe are closed, so as to complete the self-circulating fine filtration of the operating oil;

[0016] The step of storing the clean oil of the running oil tank into the clean oil tank is as follows: opening the valve of the third connecting pipe of one of the running oil tanks in the running oil tank group, opening the valves on the first branch pipe and the fifth connecting pipe, and then opening the valve on the fourth connecting pipe of each clean oil tank of the clean oil tank group, starting the vacuum oil filter, and injecting the clean oil in one of the running running oil tanks in the running oil tank group into one of the running clean oil tanks in the clean oil tank group after filtering by the vacuum oil filter, and detecting the quality of the oil injected into the clean oil tank in real time by the oil quality sensor on the fourth connecting pipe of one of the running clean oil tanks in the clean oil tank group;

[0017] The oil cleaning tank is specifically used to fill the unit with oil by opening the valve on the third connecting pipe of one of the running oil cleaning tanks in the oil cleaning tank group, opening the valves of the input and output end pipelines of the fixed oil pump, opening the valve on the sixth connecting pipe, and then opening the valves on the pipelines connecting the return oil tank, the derivation joint bearing and the water guide with the sixth connecting pipe, starting the fixed oil pump, and the clean oil in one of the running oil cleaning tanks in the oil cleaning tank group is respectively injected into the return oil tank, the upper guide, the derivation joint bearing and the water guide through the pressurization of the fixed oil pump, and the liquid level transmitters on the return oil tank, the upper guide, the derivation joint bearing and the water guide detect the oil level data in the oil tanks of each oil-consuming equipment. When the oil level rises to the set value, the fixed oil pump is stopped, and all valves are closed at the same time, completing the process of filling the unit with oil from the oil cleaning tank;

[0018] The unit overhaul oil drainage is specifically as follows: open all valves on the seventh connecting pipe, open the valves on the pipeline connecting the return oil tank, the derivation joint bearing and the water guide with the seventh connecting pipe at the same time, open the valve on the main oil drain pipe and the valve of the fourth connecting pipe of one of the running oil tanks in operation of the running oil tank group, start the oil pump to discharge the oil in the return oil tank, the upper guide, the derivation joint bearing and the water guide through the seventh connecting pipe and the main oil drain pipe into one of the running oil tanks in operation, reduce the level to a preset value according to the liquid level transmitters on the return oil tank, the upper guide, the derivation joint bearing and the water guide, turn off the oil pump, and at the same time close the valves on all the pipelines to complete the unit overhaul oil drainage work;

[0019] The pipeline cleaning is specifically as follows: open the valve of the third connecting pipe on one of the running clean oil tanks of the clean oil tank group, open the valve at the connection between the main oil drain pipe and the main oil supply pipe and the valves at the input and output ends of the fixed oil pump, then open the valve from the main oil drain pipe to the first collecting pipe, and then open the valve of the fourth connecting pipe on one of the running oil tanks of the running oil tank group. After all valves are opened, start the fixed oil pump to make the clean oil in one of the running clean oil tanks in the clean oil tank group flush the oil drain main pipe and finally flow into the running oil tank of the running oil tank group. When the corresponding parameter difference values ​​of the oil product sensor on the fourth connecting pipe of the running oil tank of the running oil tank group and the oil product sensor at the third connecting pipe on the clean oil tank of the clean oil tank group reach the required range, the pipeline flushing work of the main oil drain pipe and the main oil supply pipe is completed, and the cleaning degree reaches the required level.

[0020] The present invention has the following beneficial effects:

[0021] 1. The intelligent purification system of turbine oil and intelligent oil change system of the hydropower station of the present invention simplifies the operation process of the turbine oil system, improves the oil quality of the purified oil, and is of great benefit to shortening the maintenance time of the unit and maintaining the operating environment of the guide bearing and thrust bearing;

[0022] 2. The intelligent turbine oil purification and unit oil change system of the hydropower station of the present invention makes it possible for the purification and oil filling and draining procedures of the turbine oil system to be performed without the need for on-site intervention by the operating personnel. It is only necessary to select the preset program in the local cabinet or computer monitoring, so that the corresponding processes of the turbine oil system are all automatically operated, simplifying the system operation and ensuring the quality of the turbine oil, which is conducive to shortening the unit maintenance time and maintaining the stable operation of the unit bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the schematic diagram of the intelligent purification system of turbine oil and intelligent oil change system of the hydropower station;

[0024] Figure 2 yes Figure 1 A partial schematic diagram of

[0025] Figure 3It is a schematic diagram of the unit equipment.

[0026] In the figure, 1-operating oil tank group, 2-clean oil tank group, 3-turbine oil accident oil pool, 4-vacuum oil filter, 5-fixed oil pump, 6-oil pump, 7-return oil tank, 8-upper guide, 9-derivation joint bearing, 10-water guide, 11-main oil discharge pipe, 12-main oil supply pipe, 13-first connecting pipe, 14-second connecting pipe, 15-third connecting pipe, 16-fourth connecting pipe, 17-first collecting pipe, 18-first branch pipe, 19-fifth connecting pipe, 20-sixth connecting pipe, 21-seventh connecting pipe, 22-oil sensor, 23-liquid level transmitter, 24-oil flow meter. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0028] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection (i.e., non-detachable connection) includes but is not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment 1, combination Figure 1The present embodiment is described. The intelligent purification system for turbine oil of a hydropower station and the intelligent oil change system for a unit of the present embodiment comprises an operating oil tank group 1, a clean oil tank group 2, a turbine oil accident oil pool 3, a vacuum oil filter 4, a main oil drain pipe 11 and a main oil supply pipe 12. The operating oil tank group 1 is composed of three operating oil tanks, and the clean oil tank group 2 is composed of two clean oil tanks. Each operating oil tank and the clean oil tank are respectively connected to four pipelines. The operating oil tank and the clean oil tank are respectively connected to the turbine oil accident oil pool 3 through a first connecting pipe 13. Each first connecting pipe 13 A second connecting pipe 14 is connected to the top, the second connecting pipe 14 is communicated with the main oil supply pipe 12, the operating oil tank and the clean oil tank are respectively communicated with the main oil supply pipe 12 through a third connecting pipe 15, the operating oil tank and the clean oil tank are respectively communicated with a first collecting pipe 17 through a fourth connecting pipe 16, the first collecting pipe 17 is communicated with the main oil discharge pipe 11, the first collecting pipe 17 is connected to a first branch pipe 18, the first branch pipe 18 is communicated with the vacuum oil filter 4 through a pipeline, and the vacuum oil filter 4 is communicated with the main oil supply pipe 12 through a fifth connecting pipe 19;

[0031] The first connecting pipe 13, the second connecting pipe 14, the third connecting pipe 15, the fourth connecting pipe 15, the first collecting pipe 17, the first branch pipe 18, the fifth connecting pipe 19 and the sixth connecting pipe 20 are respectively provided with electric ball valves, the second connecting pipe 14 and the fourth connecting pipe 16 of each operating oil tank are installed with an oil product sensor 22, the third connecting pipe 15 and the fourth connecting pipe 16 of each clean oil tank are installed with an oil product sensor 22, the main oil discharge pipe 11 and the main oil supply pipe 12 are respectively provided with oil flow meters 24, the oil supply and discharge amounts are monitored by the oil flow meters 24, and the main oil supply pipe 12 is connected in parallel with a fixed oil pump 5;

[0032] It also includes unit equipment, which includes a return oil tank 7, an upper guide 8, a derivation combined bearing 9 and a water guide 10. The upper guide 8 is connected to the main oil supply pipe 12 through a sixth connecting pipe 20, and the upper guide 8 is connected to the main oil discharge pipe 11 through a seventh connecting pipe 21. The return oil tank 7, the derivation combined bearing 9 and the water guide 10 are respectively connected to the sixth connecting pipe 20 and the seventh connecting pipe 21 through pipelines. A liquid level transmitter 23 is provided on the return oil tank 7, the upper guide 8, the derivation combined bearing 9 and the water guide 10. The sixth connecting pipe 20 is an oil inlet pipe, through which oil is supplied to the return oil tank 7, the upper guide 8, the derivation combined bearing 9 and the water guide 10. The seventh connecting pipe 21 is an oil discharge pipe, which discharges the oil in the return oil tank 7, the upper guide 8, the derivation combined bearing 9 and the water guide 10;

[0033] Electric ball valves are respectively provided on the sixth connecting pipe 20 and the seventh connecting pipe 21, and electric ball valves are also provided on the pipelines connecting the return oil tank 7, the upper guide 8, the derivation combined bearing 9 and the water guide 10 with the sixth connecting pipe 20 and the seventh connecting pipe 21. The seventh connecting pipe 21 is installed with an oil pump 6, and a connecting valve is provided on the connecting pipeline between the main oil drain pipe 11 and the main oil supply pipe 12.

[0034] Embodiment 2, combined Figure 1 The present embodiment is described. The operation method of the intelligent purification system of turbine oil and intelligent oil change system of the hydropower station of the present embodiment is characterized by: including filling the operating oil tank with oil, self-circulating fine filtration of the operating oil, storing the clean oil of the operating oil tank into the clean oil tank, filling the unit with oil from the clean oil tank, draining the oil during unit maintenance and flushing the pipeline;

[0035] The oil filling of the operating oil tank is specifically as follows: opening the valve of the fourth connecting pipe 16 of each operating oil tank of the operating oil tank group 1, connecting the first collecting pipe 17 with the oil truck, opening the oil discharge valve of the oil truck, opening the valve on the first collecting pipe 17, closing the valve of the first collecting pipe 17 and the clean oil tank group 2, and injecting the turbine oil into each turbine oil tank of the turbine oil tank group 1 by gravity flow;

[0036] The self-circulating fine filtration of the operating oil is specifically as follows: the valves of the second connecting pipe 14 and the fourth connecting pipe 16 of each operating oil tank of the operating oil tank group 1 are opened, the valves of the first branch pipe 18 and the fifth connecting pipe 19 are opened, and the vacuum oil filter 4 is started, so that one of the operating oil tanks in the operating oil tank group 1 forms an oil circuit circulation, and the oil quality index of the turbine oil is monitored in real time through the oil quality sensor 22 on the second connecting pipe 14 and the fourth connecting pipe 16 of each operating oil tank. When the monitoring data of the oil quality sensor 22 meets the relevant index of the turbine oil, the vacuum oil filter 4 is closed, and then the valves on the second connecting pipe 14, the fourth connecting pipe 16, the first branch pipe 18 and the fifth connecting pipe 19 are closed, and the self-circulating fine filtration of the operating oil is completed;

[0037] The method of storing the clean oil in the running oil tank into the clean oil tank is as follows: opening the valve of the third connecting pipe 15 of one of the running oil tanks in the running oil tank group 1, opening the valves on the first branch pipe 18 and the fifth connecting pipe 19, and then opening the valve on the fourth connecting pipe 16 of each clean oil tank in the clean oil tank group 2, starting the vacuum oil filter 4, and injecting the clean oil in one of the running oil tanks in the running oil tank group 1 into one of the running clean oil tanks in the clean oil tank group 2 after filtering by the vacuum oil filter 4, and then detecting the quality of the oil injected into the clean oil tank in real time by the oil quality sensor 22 on the fourth connecting pipe 16 of one of the running clean oil tanks in the clean oil tank group 2;

[0038] The oil cleaning tank is specifically used to fill the unit with oil as follows: open the valve on the third connecting pipe 15 on one of the running oil cleaning tanks of the oil cleaning tank group 2, open the valves of the input and output end pipelines of the fixed oil pump 5, open the valve on the sixth connecting pipe 20, and then open the valves on the connecting pipelines of the return oil tank 7, the derivation joint bearing 9 and the water guide 10 with the sixth connecting pipe 20, start the fixed oil pump 5, and the clean oil in one of the running oil cleaning tanks of the oil cleaning tank group 2 is respectively injected into the return oil tank 7, the upper guide 8, the derivation joint bearing 9 and the water guide 10 through the pressurization of the fixed oil pump 5, and the liquid level transmitters 23 on the return oil tank 7, the upper guide 8, the derivation joint bearing 9 and the water guide 10 detect the oil level data in the oil tanks of each oil-consuming equipment. When the oil level rises to the set value, stop the fixed oil pump 5, and close all valves at the same time to complete the process of filling the unit with oil from the oil cleaning tank;

[0039] The unit overhaul and oil drainage is specifically as follows: open all valves on the seventh connecting pipe 21, open the valves on the pipeline connecting the return oil tank 7, the derivation joint bearing 9 and the water guide 10 with the seventh connecting pipe 21 at the same time, open the valve on the main oil drain pipe 11 and the valve of the fourth connecting pipe 16 of one of the running oil tanks of the running oil tank group 1, start the oil pump 6 to drain the oil in the return oil tank 7, the upper guide 8, the derivation joint bearing 9 and the water guide 10 into one of the running oil tanks through the seventh connecting pipe 21 and the main oil drain pipe 11, and then drain the oil from the return oil tank 7, the upper guide 8, the derivation joint bearing 9 and the water guide 10 into one of the running oil tanks. According to the liquid level transmitter 23 on the oil return tank 7, upper guide 8, derivation joint bearing 9 and water guide 10, the oil level is reduced to the preset value, the oil pump 6 is turned off, and the valves on all pipelines are closed at the same time to complete the unit maintenance and oil discharge work. The oil flow meter 24 is respectively set on the main oil discharge pipe 11 and the main oil supply pipe 12. The oil flow meter 24 is a turbine flow meter. The oil return flow rate of the oil tank is recorded by the oil flow meter 24, and the injected oil amount is compared to analyze the oil atomization degree of the turbine oil of each guide bearing, so as to judge the running state of the bearing;

[0040] The pipeline cleaning is specifically as follows: open the valve of the third connecting pipe 15 on one of the running clean oil tanks of the clean oil tank group 2, open the valve at the connection of the main oil drain pipe 11 and the main oil supply pipe 12 and the valves at the input and output ends of the fixed oil pump 5, then open the valve of the main oil drain pipe 11 to the first collecting pipe 17, and then open the valve of the fourth connecting pipe 16 on one of the running oil tanks of the running oil tank group 1. After all valves are opened, start the fixed oil pump 5, so that the clean oil in one of the running clean oil tanks in the clean oil tank group 2 flushes the oil drain main pipe, and finally flows into the running oil tank of the running oil tank group 1. When the corresponding parameter difference values ​​of the oil product sensor 22 on the fourth connecting pipe 16 of the running oil tank of the running oil tank group 1 and the oil product sensor 22 at the third connecting pipe 15 on the clean oil tank of the clean oil tank group 2 reach the required range, the pipeline flushing work of the main oil drain pipe 11 and the main oil supply pipe 12 is completed, and the cleaning degree reaches the required level.

[0041] This embodiment is only an exemplary description of this patent and does not limit its protection scope. Those skilled in the art may also make partial changes to it, as long as they do not exceed the spirit of this patent, they are all within the protection scope of this patent.

Claims

1. Intelligent purification system for turbine oil and intelligent oil change system for hydropower station, characterized by: The invention comprises an operating oil tank group (1), a clean oil tank group (2), a turbine oil accident oil pool (3), a vacuum oil filter (4), a main oil drain pipe (11) and a main oil supply pipe (12); the operating oil tank group (1) comprises a plurality of operating oil tanks; the clean oil tank group (2) comprises a plurality of clean oil tanks; each operating oil tank and each clean oil tank are respectively connected to the turbine oil accident oil pool (3) via a first connecting pipe (13); a second connecting pipe (14) is arranged on the first connecting pipe (13); the second connecting pipe (14) is connected to the main oil supply pipe (12). ), the operating oil tank and the clean oil tank are connected to the main oil supply pipe (12) through a third connecting pipe (15), the operating oil tank and the clean oil tank are connected to the first collecting pipe (17) through a fourth connecting pipe (16), the first collecting pipe (17) is connected to the main oil discharge pipe (11), a first branch pipe (18) is provided on the first collecting pipe (17), the vacuum oil filter (4) is connected to the first branch pipe (18) through a pipeline, and the vacuum oil filter (4) is connected to the main oil supply pipe (12) through a fifth connecting pipe (19); The invention also comprises an oil return tank (7), an upper guide (8), a derivation combined bearing (9) and a water guide (10); the upper guide (8) is connected to a main oil supply pipe (12) through a sixth connecting pipe (20); the upper guide (8) is connected to a main oil discharge pipe (11) through a seventh connecting pipe (21); the oil return tank (7), the derivation combined bearing (9) and the water guide (10) are respectively connected to the sixth connecting pipe (20) and the seventh connecting pipe (21) through pipelines; an oil flow meter (24) is respectively arranged on the main oil discharge pipe (11) and the main oil supply pipe (12); a liquid level transmitter (23) is arranged on the oil return tank (7), the upper guide (8), the derivation combined bearing (9) and the water guide (10); and the main oil discharge pipe (11) is connected to the main oil supply pipe (12).

2. The intelligent purification system for turbine oil and intelligent oil change system for hydropower station according to claim 1 is characterized by: The seventh connecting pipe (21) is provided with an oil pump (6), and valves are provided at both ends of the oil pump (6).

3. The intelligent purification system for turbine oil and intelligent oil change system for hydropower station according to claim 2 is characterized by: A fixed oil pump (5) is connected in parallel to the main oil supply pipe (12).

4. The intelligent purification system for turbine oil and intelligent oil change system for hydropower station according to claim 3 is characterized by: The second connecting pipe (14) and the fourth connecting pipe (16) on the operating oil tank group (1) are respectively provided with oil product sensors (22), and the third connecting pipe (15) and the fourth connecting pipe (16) on the clean oil tank group (2) are respectively provided with oil product sensors (22).

5. The intelligent purification system for turbine oil and intelligent oil change system for hydropower station according to claim 4 is characterized by: Valves are respectively provided on the first connecting pipe (13), the second connecting pipe (14), the third connecting pipe (15), the fourth connecting pipe (16), the fifth connecting pipe (19), the sixth connecting pipe (20) and the seventh connecting pipe (21).

6. The operating method of the intelligent purification system for turbine oil and intelligent oil change system for a hydropower station as claimed in claim 5 is characterized by: Including filling the operating oil tank, self-circulating fine filtration of the operating oil, storing the clean oil in the operating oil tank into the clean oil tank, filling the unit with oil from the clean oil tank, draining the oil during unit maintenance and flushing the pipeline; The oil filling of the operating oil tank is specifically as follows: opening the valve of the fourth connecting pipe (16) of each operating oil tank of the operating oil tank group (1), connecting the first collecting pipe (17) with the oil truck, opening the oil discharge valve of the oil truck, opening the valve on the first collecting pipe (17), closing the valve between the first collecting pipe (17) and the clean oil tank group (2), and injecting the turbine oil into each operating oil tank of the operating oil tank group (1) by gravity flow; The self-circulating fine filtration of the operating oil specifically comprises: opening the valves of the second connecting pipe (14) and the fourth connecting pipe (16) of each operating oil tank of the operating oil tank group (1), opening the valves of the first branch pipe (18) and the fifth connecting pipe (19), starting the vacuum oil filter (4), so that one of the operating oil tanks of the operating oil tank group (1) forms an oil circuit, and monitoring the oil quality index of the turbine oil in real time through the oil quality sensor (22) on the second connecting pipe (14) and the fourth connecting pipe (16) of the operating oil tank; when the monitoring data of the oil quality sensor (22) meets the relevant index of the turbine oil, closing the vacuum oil filter (4), and then closing the valves on the second connecting pipe (14), the fourth connecting pipe (16), the first branch pipe (18) and the fifth connecting pipe (19), thereby completing the self-circulating fine filtration of the operating oil; The method of storing the clean oil in the running oil tank into the clean oil tank is as follows: opening the valve of the third connecting pipe (15) of one of the running oil tanks in the running oil tank group (1), opening the valves on the first branch pipe (18) and the fifth connecting pipe (19), and then opening the valve on the fourth connecting pipe (16) of each clean oil tank in the clean oil tank group (2), starting the vacuum oil filter (4), filtering the clean oil in one of the running oil tanks in the running oil tank group (1) through the vacuum oil filter (4) and then injecting it into one of the running clean oil tanks in the clean oil tank group (2), and detecting the quality of the oil injected into the clean oil tank in real time through the oil quality sensor (22) on the fourth connecting pipe (16) of one of the running clean oil tanks in the clean oil tank group (2); The oil cleaning tank is specifically used to fill the unit with oil by opening the valve on the third connecting pipe (15) on one of the running oil cleaning tanks in the oil cleaning tank group (2), opening the valves on the input and output end pipelines of the fixed oil pump (5), opening the valve on the sixth connecting pipe (20), and then opening the valves on the pipelines connecting the return oil tank (7), the derivation joint bearing (9) and the water guide (10) to the sixth connecting pipe (20), starting the fixed oil pump (5), and opening one of the running oil cleaning tanks in the oil cleaning tank group (2). The clean oil in the running clean oil tank is respectively injected into the return oil tank (7), the upper guide (8), the derivation joint bearing (9) and the water guide (10) by the pressurization of the fixed oil pump (5). The liquid level transmitters (23) on the return oil tank (7), the upper guide (8), the derivation joint bearing (9) and the water guide (10) detect the oil level data in the oil tank of each oil-consuming equipment. When the oil level rises to the set value, the fixed oil pump (5) is stopped and all valves are closed at the same time, completing the process of filling the clean oil tank with oil to the unit; The unit overhaul and oil drainage specifically comprises: opening all valves on the seventh connecting pipe (21), and at the same time opening the valves on the pipeline connecting the return oil tank (7), the derivation joint bearing (9) and the water guide (10) with the seventh connecting pipe (21), opening the valve on the main oil drainage pipe (11) and the valve on the fourth connecting pipe (16) of one of the running oil tanks of the running oil tank group (1), starting the oil pump (6) to discharge the oil in the return oil tank (7), the upper guide (8), the derivation joint bearing (9) and the water guide (10) into one of the running oil tanks through the seventh connecting pipe (21) and the main oil drainage pipe (11), and according to the liquid level transmitter (23) on the return oil tank (7), the upper guide (8), the derivation joint bearing (9) and the water guide (10) being reduced to a preset value, closing the oil pump (6), and at the same time closing the valves on all the pipelines, completing the unit overhaul and oil drainage work; The pipeline cleaning is specifically as follows: opening the valve of the third connecting pipe (15) on one of the running oil clean tanks of the oil clean tank group (2), opening the valve at the connection between the main oil discharge pipe (11) and the main oil supply pipe (12) and the valves at the input and output ends of the fixed oil pump (5), then opening the valve from the main oil discharge pipe (11) to the first collecting pipe (17), and then opening the valve of the fourth connecting pipe (16) on one of the running oil tanks of the running oil tank group (1). After all valves are opened, starting the fixed oil pump (5) ), so that the clean oil in a running clean oil tank in the clean oil tank group (2) flushes the oil drain main pipe and finally flows into the running oil tank of the running oil tank group (1); when the corresponding parameter difference value of the oil product sensor (22) on the fourth connecting pipe (16) of the running oil tank of the running oil tank group (1) and the oil product sensor (22) at the third connecting pipe (15) on the clean oil tank of the clean oil tank group (2) reaches within the required range, the pipeline flushing work of the main drain pipe (11) and the main supply pipe (12) is completed and the cleaning degree reaches the required level.

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