CN217481632U - Hydraulic control system for water inlet accident door of large-scale hydroelectric power plant unit - Google Patents
Hydraulic control system for water inlet accident door of large-scale hydroelectric power plant unit Download PDFInfo
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- CN217481632U CN217481632U CN202221229321.5U CN202221229321U CN217481632U CN 217481632 U CN217481632 U CN 217481632U CN 202221229321 U CN202221229321 U CN 202221229321U CN 217481632 U CN217481632 U CN 217481632U
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Abstract
The utility model discloses a hydraulic control system for a water inlet accident door of a large-scale hydraulic power plant unit, which comprises a hydraulic pump station and a unit hydraulic valve group, wherein the hydraulic pump station comprises two groups of hydraulic pumps and an oil return tank; an oil pump oil inlet communicating pipe is connected between the two oil return tanks; a first communicating pipe, a second communicating pipe and a third communicating pipe are respectively connected between the two oil return tanks; parallel connection has the benefit oil pipe on the third communicating pipe, and two sets of hydraulic pump one end are equallyd divide and are connected with the second communicating pipe through oil pipe respectively, and the other end all is connected with oil pump export combination valve through oil pipe, and two oil pump export combination valve one end are equallyd divide and are connected with first communicating pipe respectively, and the other end all is connected with total oil supply pipe, and two total oil supply pipes are connected with unit hydraulic valve group, and unit hydraulic valve group supplies the oil drain pipe to be connected with each outside emergency gate hydraulic control system through the unit emergency gate. This application can ensure that arbitrary oil pump, hydraulic pressure valves, oil return tank do not influence pump station system safe operation when overhauing or breaking down, promote accident gate system reliability by a wide margin.
Description
Technical Field
The utility model relates to a water inlet accident door hydraulic control system, it specifically is to relate to a large-scale hydroelectric power plant unit water inlet accident door hydraulic control system, belongs to power station safety technical field.
Background
Generally speaking, the unit water inlet accident door, as the last protective equipment of the hydroelectric generating set, plays a crucial role in the unit operation: when a machine set without a barrel valve is subjected to mechanical overspeed, runaway or shearing of a guide vane shearing pin, the accident door of the water inlet of the machine set can be quickly closed, and further expansion of accidents can be effectively avoided.
At present, in hydropower construction, in order to save construction cost or due to a unique design idea of a designer, a construction party does not fully consider operation and maintenance risks possibly existing in the actual operation of an accident door, so that the accident door of a water inlet of a unit of some hydropower stations adopts a 'one-drive-N' hydraulic control system, part of equipment in the hydraulic control system is shared, although the investment is saved, the reliability of the system is reduced, for example, an oil pump combination valve bank, an oil return pipe, a filter and the like of a hydraulic power unit are shared, although two sets of oil return tanks of the hydraulic pump station are configured, the oil return tanks do not form a mutual standby relationship, when the common equipment has defects and faults and needs to be processed or the oil return tanks need to be overhauled, the devices cannot be completely isolated, so that the reliability of the hydraulic control system of the accident door is greatly reduced, and the risk of unit operation is increased.
Above-mentioned prior art has unit water inlet accident door hydraulic control system to adopt "one drags N" mode, and a hydraulic power unit supplies with many unit water inlet accident doors simultaneously and opens a door and have a pole chamber oil pressure promptly, and a piece of oil return pipe of many unit sharings, and hydraulic power unit oil pump valves, oil return tank do not form each other and are the stand-by relation, and this hydraulic control system has many-sided risk in service: firstly, a plurality of unit water inlet accident door hydraulic systems share one path of oil return pipe and filter, and when any unit door falling operation is carried out, the risk of other operating unit accident doors sliding downwards exists. Secondly, the hydraulic pump station is only provided with one outlet valve group, and when the valve group breaks down or is overhauled, the risk that the gate cannot be opened or closed exists. And although the hydraulic pump station is provided with two sets of oil return tanks, an oil overflow pipe of an oil pump of the pump station is only connected with a single oil tank, and when the single oil return tank is overhauled, one hydraulic pump needs to be cut off, so that the reliability of the hydraulic pump station of the unit accident door is greatly reduced.
Therefore, the development of a hydraulic control system for the water inlet accident door of the large-scale hydroelectric power plant unit with high practicability and high working reliability is a key point for solving the technical problems.
Disclosure of Invention
To a great deal of defect and not enough that exist among the above-mentioned background art, the utility model discloses improve and the innovation to this, aim at provides a structure is simple and easy, novel in design is reasonable, adopts "one to drag" mode operation, and the oil pump export increases one set of combination valves, makes two sets of valves independent operation, and each other is reserve, improves water inlet accident door hydraulic power unit reliability.
In order to solve the above problems and achieve the above object, the present invention provides a hydraulic control system for water inlet emergency gate of large-scale hydroelectric generating set, which is implemented by adopting the following design structure and the following technical solution:
a hydraulic control system for a water inlet accident door of a large-scale hydraulic power plant unit comprises a hydraulic pump station and a unit hydraulic valve group (26), wherein the hydraulic pump station comprises two groups of hydraulic pumps and oil return boxes (31) positioned on two sides of the two groups of hydraulic pumps;
an oil pump oil inlet communicating pipe (8) is connected between the two oil return tanks (31); two groups of hydraulic pumps are connected in parallel on an oil inlet communicating pipe (8) of the oil pump;
a first communicating pipe (4), a second communicating pipe (6) and a third communicating pipe (32) are respectively connected between the two oil return tanks (31);
an oil supplementing pipe (22) is connected to the third communicating pipe (32) in parallel, and the oil supplementing pipe (22) is connected with a rodless cavity of an oil cylinder of the unit emergency door opening and closing machine;
one ends of the two groups of hydraulic pumps are respectively connected with the second communicating pipe (6) through oil spilling pipes (28), the other ends of the two groups of hydraulic pumps are respectively connected with the oil pump outlet combination valves (3) through oil pipes, one ends of the two oil pump outlet combination valves (3) are respectively connected with the first communicating pipe (4), the other ends of the two oil pump outlet combination valves (3) are respectively connected with the main oil supply pipe (24), the two main oil supply pipes (24) are connected with the unit hydraulic valve group (26), and the hydraulic valve group (26) is connected with each external accident gate hydraulic control system through the unit accident gate oil supply and discharge pipe (27);
wherein, be connected with several oil return pipes between two oil return case (31), each oil return pipe all is connected with unit hydraulic pressure valves (26) through communicating pipe of being connected with it, all is connected with differential pressure signaling sensor on every oil return pipe.
Preferably, two sets of hydraulic pumps all include motor (1) and oil pump (2) be connected with motor (1), and the exit of each oil pump (2) all is connected with oil pump export combination valve (3) through oil pipe.
Preferably, the two oil pump outlet combination valves (3) are connected with the first communicating pipe (4) in parallel; two ends of the first communicating pipe (4) are respectively provided with a first isolating valve (5).
Preferably, both ends of the second communicating pipe (6) are provided with second isolating valves (7).
Preferably, both ends of the oil pump oil inlet communicating pipe (8) are connected with an oil inlet isolating valve (9) and an oil inlet filter (10), and the oil inlet filter (10) is arranged between the oil inlet isolating valve (9) and an oil return tank (31) correspondingly connected with the oil inlet isolating valve.
Preferably, a third isolating valve (29) is arranged at the joint of two ends of the third communicating pipe (32) and the corresponding oil return tank (31).
Preferably, the oil supplementing pipes (22) are connected to the middle of the third communicating pipe (32) in parallel, and oil supplementing isolation valves (23) are arranged at the joints of the oil supplementing pipes (22) and the third communicating pipe (32); each main oil supply pipe (24) is provided with a main oil supply pipe isolation valve (25).
Preferentially, each oil return tank (31) is provided with a plurality of oil return pipe interfaces, each oil return pipe interface is correspondingly provided with an oil return pipe, two ends of each oil return pipe are connected with the oil return tank interfaces, and the oil return pipes are also connected with a first oil return pipe isolation valve (16) and a first oil return filter (17) through connecting pipes and are connected with the other interface of the adjacent oil return tank (31); and the joints of the other oil return pipes are connected with oil return pipe isolation valves and filter assemblies.
Preferably, differential pressure signaling sensors matched with the first oil return filter (17) and each oil return pipe isolation valve and filter assembly are arranged on the first oil return filter and each oil return pipe isolation valve and filter assembly.
Preferably, the unit hydraulic valve group (26) is composed of a plurality of hydraulic valve groups arranged in parallel in rows, each hydraulic valve group is provided with an oil return valve group installation interface, and the oil return valve group installation interfaces are connected with corresponding oil return pipes through communicating pipes.
Compared with the prior art, the utility model produced beneficial effect is:
1. the utility model discloses the structure is simple and easy, novel in design is reasonable, adopts "one drags one" mode operation, and two hydraulic pump-combination valves (each other is reserve) supply with five unit water inlet emergency exits and open a pole chamber oil pressure promptly, and every unit has independent oil return pipe, and two oil return tank each other are reserve, have improved emergency exit hydraulic control system's reliability greatly:
2. the oil overflow loop of the oil pump combined valve group of the utility model is changed from single configuration to redundant configuration, which can ensure that the safe operation of a pump station system is not influenced when any oil pump, hydraulic valve group and oil return tank are overhauled or failed, and greatly improve the reliability of an accident gate system;
3. the utility model adds a set of combined valve group at the outlet of the oil pump, so that the two sets of valve groups can be operated independently and mutually stand-by, thereby improving the reliability of the hydraulic pump station of the water inlet accident door;
4. the utility model discloses every unit all has solitary oil return pipe to insert 1, No. 2 oil return case, can not cause the interference to other gate operations when the unit gate operation, has improved accident door hydraulic control system reliability, reduces the risk that the accident gate slided, has improved gate system reliability, guarantees the long period safety and stability operation of unit.
Drawings
The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:
fig. 1 is one of the overall structural schematic diagrams of the present invention;
fig. 2 is a second schematic view of the overall structure of the present invention;
fig. 3 is a plan view illustration of the present invention;
FIG. 4 is a layout diagram of the hydraulic control system of the present invention;
wherein, the reference numbers in the figures: 1-a motor, 2-an oil pump, 3-an oil pump outlet combination valve, 4-a first communicating pipe, 5-a first isolation valve, 6-a second communicating pipe, 7-a second isolation valve, 8-an oil pump inlet communicating pipe, 9-an oil inlet isolation valve, 10-an oil inlet filter, 11-a first oil return pipe, 12-a second oil return pipe, 13-a third oil return pipe, 14-a fourth oil return pipe, 15-a fifth oil return pipe, 16-a first oil return pipe isolation valve, 17-a first oil return filter, 18-a second oil return pipe isolation valve and filter assembly, 19-a third oil return pipe isolation valve and filter assembly, 20-a fourth oil return pipe isolation valve and filter assembly, 21-a fifth oil return pipe isolation valve and filter assembly, 22-an oil supplement pipe, 23-an oil supplement isolation valve, 24-a main pipe, 25-a main oil supply pipe isolation valve, 26-a unit hydraulic valve set, 27-a unit accident door oil supply and discharge pipe, 28-oil spilling pipe, 29-third isolating valve, 31-oil returning tank, 32-third communicating pipe.
Detailed Description
In order to make the technical means, inventive features, and achievement objects and functions of the present invention easy to understand, the technical solutions of the present invention are further described in detail with reference to the accompanying drawings and the detailed description below, and it should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
A hydraulic control system for a water inlet accident door of a large-scale hydraulic power plant unit comprises a hydraulic pump station and a unit hydraulic valve group 26, wherein the hydraulic pump station comprises two groups of hydraulic pumps and oil return boxes 31 positioned on two sides of the two groups of hydraulic pumps;
an oil pump oil inlet communicating pipe 8 is connected between the two oil return tanks 31; two groups of hydraulic pumps are connected in parallel on the oil pump oil inlet communicating pipe 8;
a first communicating pipe 4, a second communicating pipe 6 and a third communicating pipe 32 are respectively connected between the two oil return tanks 31;
the third communication pipe 32 is connected with an oil supplementing pipe 22 in parallel, and the oil supplementing pipe 22 is connected with a rodless cavity of a cylinder of the unit accident door hoist;
one ends of the two groups of hydraulic pumps are respectively connected with the second communicating pipe 6 through oil spilling pipes 28, the other ends of the two groups of hydraulic pumps are respectively connected with the oil pump outlet combination valves 3 through oil pipes, one ends of the two oil pump outlet combination valves 3 are respectively connected with the first communicating pipe 4, the other ends of the two oil pump outlet combination valves 3 are respectively connected with the main oil supply pipe 24, the two main oil supply pipes 24 are connected with the unit hydraulic valve group 26, and the unit hydraulic valve group 26 is connected with each external accident gate hydraulic control system through a unit accident gate oil supply and discharge pipe 27;
wherein, be connected with several oil return pipes between two oil return tank 31, each oil return pipe all is connected with unit hydraulic pressure valves 26 through communicating pipe of being connected with it, all is connected with differential pressure signaling sensor on every oil return pipe.
The utility model discloses in, hydraulic power unit includes a plurality of oil return tanks, a plurality of oil pump motor group, plural set oil pump export combination valves 3, a plurality of units return oil pipe and return oil filter, plural mend oil pipe, hydraulic power unit's equipment all is redundant configuration, form each other and be the standby relation, plural oil pump motor group and export combination valves are parallelly connected, the oil pipe that goes out of oil pump electric group after parallelly connected and export combination valves is connected to the control valves of unit, and communicate in the hydraulic control system of every accident gate through the control valves, every quick-witted hydraulic control system's return oil pipe is connected to the control valves, again by two oil return tanks 31 of solitary oil return union coupling to hydraulic power unit. The oil supplementing pipe is connected with a rodless cavity of an oil cylinder of the gate hoist, but is not connected with the hydraulic valve group.
Two sets of hydraulic pumps all include motor 1 and the oil pump 2 of being connected with motor 1, and the exit of each oil pump 2 all is connected with oil pump export combination valve 3 through oil pipe.
The two oil pump outlet combination valves 3 are connected with the first communicating pipe 4 in parallel; two ends of the first communicating pipe 4 are provided with first isolating valves 5.
And two ends of the second communicating pipe 6 are provided with second isolating valves 7.
The two ends of the oil pump oil inlet communicating pipe 8 are both connected with an oil inlet isolating valve 9 and an oil inlet filter 10, and the oil inlet filter 10 is arranged between the oil inlet isolating valve 9 and an oil return tank 31 which is correspondingly connected.
And a third isolating valve 29 is arranged at the joint of the two ends of the third communicating pipe 32 and the corresponding oil return tank 31.
The oil supplementing pipes 22 are connected to the middle of the third communicating pipe 32 in parallel, and oil supplementing isolation valves 23 are arranged at the joints of the oil supplementing pipes 22 and the third communicating pipe 32; each of the main oil supply pipes 24 is provided with a main oil supply pipe isolation valve 25.
Each oil return tank 31 is provided with a plurality of oil return pipe interfaces, each oil return pipe interface is correspondingly provided with an oil return pipe, two ends of an oil return pipe are connected with the oil return tank interfaces, and the oil return pipe interfaces are also connected with a first oil return pipe isolation valve 16 and a first oil return filter 17 through connecting pipes and are connected with the other interface of the adjacent oil return tank 31; the joints of the other oil return pipes are connected with oil return pipe isolation valves and filter assemblies.
In the utility model, each oil return tank 31 is provided with five oil return pipe interfaces, which are respectively and correspondingly connected with a first oil return pipe 11, a second oil return pipe 12, a third oil return pipe 13, a fourth oil return pipe 14 and a fifth oil return pipe 15, wherein both ends of the first oil return pipe 11 are connected with the oil return tank 31 interfaces, and both ends of the first oil return pipe 11 are connected with a first oil return pipe isolation valve 16 and a first oil return filter 17 through connecting pipes and are connected with another interface of the adjacent oil return tank 31; the oil return tank interfaces of the second oil return pipe 12, the third oil return pipe 13, the fourth oil return pipe 14 and the fifth oil return pipe 15 are all connected with an oil return pipe isolation valve and a filter assembly;
the joints of the second oil return pipe 12, the third oil return pipe 13, the fourth oil return pipe 14, the fifth oil return pipe 15 and the oil return tank are respectively and correspondingly connected with a second oil return pipe isolation valve and filter assembly 18, a third oil return pipe isolation valve and filter assembly 19, a fourth oil return pipe isolation valve and filter assembly 20 and a fifth oil return pipe isolation valve and filter assembly 21.
Differential pressure signaling sensors matched with the first oil return filter 17 and each oil return pipe isolation valve and filter assembly are arranged on the first oil return filter and each oil return pipe isolation valve and filter assembly.
The unit hydraulic valve group 26 is composed of a plurality of hydraulic valve groups arranged in parallel in rows, each hydraulic valve group is provided with an oil return valve group installation interface, and the oil return valve group installation interfaces are connected with corresponding oil return pipes through communicating pipes.
The utility model discloses in, hydraulic pressure valves opens and close for water inlet accident door and carries out switching control.
The unit hydraulic valve group 26 is composed of five hydraulic valve groups arranged in parallel in rows, five oil return valve group installation interfaces are respectively arranged on the unit hydraulic valve group 26, and a first hydraulic valve group, a second hydraulic valve group, a third hydraulic valve group, a fourth hydraulic valve group and a fifth hydraulic valve group are respectively connected to the five oil return valve group installation interfaces.
In the utility model, two ends of the first oil return pipe 11 are connected with corresponding interfaces of the oil return boxes 31 on two sides, and two ends of the first oil return pipe 11 are also connected with another interface on the adjacent oil return box 31 through a connecting pipe, and the middle section of the first oil return pipe 11 is connected with the first hydraulic valve group installation interface through a communicating pipe;
two ends of the second oil return pipe 12 are connected with second oil return pipe isolation valves and filter assemblies 18 on the oil return boxes 31 on two sides, and the middle section of the second oil return pipe 12 is connected with a second hydraulic valve set installation interface through a communicating pipe;
two ends of a third oil return pipe 13 are connected with third oil return pipe isolation valves and filter assemblies 19 on oil return tanks 31 on two sides, and the middle section of the third oil return pipe 13 is connected with a third hydraulic valve group installation interface through a communicating pipe;
two ends of a fourth oil return pipe 14 are connected with fourth oil return pipe isolation valves and filter assemblies 20 on oil return tanks 31 on two sides, and the middle section of the fourth oil return pipe 14 is connected with a fourth hydraulic valve group installation interface through a communicating pipe;
the two ends of the fifth oil return pipe 15 are connected with the fifth oil return pipe isolation valve and the filter assembly 21 on the oil return tanks 31 on the two sides, and the middle section of the fifth oil return pipe 15 is connected with a fifth hydraulic valve group installation interface through a communicating pipe.
To sum up, the utility model discloses the advantage that has in particular embodiment is:
1. the utility model provides a 'one-drag-one' hydraulic control system for the unit water inlet accident gate, which ensures the reliability of the equipment system without increasing the engineering quantity and has the advantages of reliable equipment, less investment in new construction or reconstruction and extension and concise field arrangement;
2. the utility model provides a novel reliable "one drags one" model has that the reliability is high to return oil tank, oil pump motor group, export valves etc. and forms each other and be equipped with the relation, and the oil pipe that returns of every machine is mutually independent again, on-the-spot arrange clean and tidy, newly-built or change the extension investment less, reform transform the practicality strong, it is lower to unit accident gate hydraulic system operation influence during the transformation, can effective control implement a series of advantages such as risk, convenient to maintain and overhaul, the benefit is very obvious.
It is right above the utility model provides a large-scale hydroelectric power plant unit water inlet accident door hydraulic control system has carried out detailed introduction, and is right here the utility model discloses a principle has carried out the description, and the description of above theory of working is only used for helping to understand the utility model discloses a core thought. It should be noted that modifications and adaptations of the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the appended claims.
Claims (10)
1. The utility model provides a large-scale hydroelectric power plant unit water inlet accident door hydraulic control system, includes hydraulic power unit and unit hydraulic pressure valves (26), its characterized in that: the hydraulic pump station comprises two groups of hydraulic pumps and oil return boxes (31) positioned at two sides of the two groups of hydraulic pumps;
an oil pump oil inlet communicating pipe (8) is connected between the two oil return tanks (31); two groups of hydraulic pumps are connected in parallel on an oil inlet communicating pipe (8) of the oil pump;
a first communicating pipe (4), a second communicating pipe (6) and a third communicating pipe (32) are respectively connected between the two oil return tanks (31);
an oil supplementing pipe (22) is connected to the third communicating pipe (32) in parallel, and the oil supplementing pipe (22) is connected with a rodless cavity of an oil cylinder of the unit emergency gate hoist;
one ends of the two groups of hydraulic pumps are respectively connected with the second communicating pipe (6) through oil overflow pipes (28), the other ends of the two groups of hydraulic pumps are respectively connected with oil pump outlet combination valves (3) through oil pipes, one ends of the two oil pump outlet combination valves (3) are respectively connected with the first communicating pipe (4), the other ends of the two oil pump outlet combination valves (3) are respectively connected with a main oil supply pipe (24), the two main oil supply pipes (24) are connected with a unit hydraulic valve group (26), and the hydraulic valve group (26) is connected with each external emergency gate hydraulic control system through a unit emergency gate oil supply and discharge pipe (27);
wherein, be connected with several back oil pipe between two oil return case (31), each back oil pipe all is connected with unit hydraulic pressure valves (26) through communicating pipe that is connected with it, all is connected with differential pressure signaling sensor on every back oil pipe.
2. The hydraulic control system for the emergency door of the water inlet of the large-scale hydroelectric generating set according to claim 1, wherein: the two sets of hydraulic pumps comprise a motor (1) and oil pumps (2) connected with the motor (1), and the outlets of the oil pumps (2) are connected with an oil pump outlet combination valve (3) through oil pipes.
3. The hydraulic control system for the emergency door of the water inlet of the large-scale hydroelectric power plant unit according to claim 2, wherein: the two oil pump outlet combination valves (3) are connected with the first communicating pipe (4) in parallel; two ends of the first communicating pipe (4) are provided with first isolating valves (5).
4. The hydraulic control system for the emergency door of the water inlet of the large-scale hydroelectric generating set according to claim 1, wherein: and two ends of the second communicating pipe (6) are respectively provided with a second isolating valve (7).
5. The hydraulic control system for the emergency door of the water inlet of the large-scale hydroelectric generating set according to claim 1, wherein: the oil pump oil inlet communicating pipe (8) is characterized in that two ends of the oil pump oil inlet communicating pipe (8) are connected with an oil inlet isolating valve (9) and an oil inlet filter (10), and the oil inlet filter (10) is arranged between the oil inlet isolating valve (9) and an oil return tank (31) correspondingly connected with the oil inlet isolating valve.
6. The hydraulic control system for the accident door of the water inlet of the large-scale hydroelectric generating set according to claim 1, characterized in that: and a third isolating valve (29) is arranged at the joint of two ends of the third communicating pipe (32) and the corresponding oil return tank (31).
7. The hydraulic control system for the accident door of the water inlet of the large-scale hydroelectric generating set according to claim 1, characterized in that: the oil supplementing pipes (22) are connected in parallel to the middle of the third communicating pipe (32), and oil supplementing isolation valves (23) are arranged at the joints of the oil supplementing pipes (22) and the third communicating pipe (32); each main oil supply pipe (24) is provided with a main oil supply pipe isolation valve (25).
8. The hydraulic control system for the emergency door of the water inlet of the large-scale hydroelectric generating set according to claim 1, wherein: each oil return tank (31) is provided with a plurality of oil return pipe interfaces, each oil return pipe interface is correspondingly provided with an oil return pipe, two ends of each oil return pipe are connected with the oil return tank interfaces, and the oil return pipes are also connected with a first oil return pipe isolation valve (16) and a first oil return filter (17) through connecting pipes and are connected with the other interface of the adjacent oil return tank (31); and the joints of the other oil return pipes are connected with oil return pipe isolation valves and filter assemblies.
9. The hydraulic control system for the emergency door of the water inlet of the large-scale hydroelectric generating set according to claim 8, wherein: differential pressure signaling sensors matched with the first oil return filter (17) and each oil return pipe isolation valve and filter assembly are arranged on the first oil return filter and each oil return pipe isolation valve and filter assembly.
10. The hydraulic control system for the emergency door of the water inlet of the large-scale hydroelectric generating set according to claim 1, wherein: the unit hydraulic valve group (26) is composed of a plurality of hydraulic valve groups arranged in parallel in rows, each hydraulic valve group is provided with an oil return valve group installation interface, and the oil return valve group installation interfaces are connected with corresponding oil return pipes through communicating pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221229321.5U CN217481632U (en) | 2022-05-18 | 2022-05-18 | Hydraulic control system for water inlet accident door of large-scale hydroelectric power plant unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221229321.5U CN217481632U (en) | 2022-05-18 | 2022-05-18 | Hydraulic control system for water inlet accident door of large-scale hydroelectric power plant unit |
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| Publication Number | Publication Date |
|---|---|
| CN217481632U true CN217481632U (en) | 2022-09-23 |
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ID=83309896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221229321.5U Active CN217481632U (en) | 2022-05-18 | 2022-05-18 | Hydraulic control system for water inlet accident door of large-scale hydroelectric power plant unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN217481632U (en) |
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2022
- 2022-05-18 CN CN202221229321.5U patent/CN217481632U/en active Active
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