CN219672697U - Main valve oil motor control system and steam turbine - Google Patents
Main valve oil motor control system and steam turbine Download PDFInfo
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- CN219672697U CN219672697U CN202320646041.2U CN202320646041U CN219672697U CN 219672697 U CN219672697 U CN 219672697U CN 202320646041 U CN202320646041 U CN 202320646041U CN 219672697 U CN219672697 U CN 219672697U
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- 239000003921 oil Substances 0.000 description 137
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
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- 230000000750 progressive effect Effects 0.000 description 1
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Abstract
The utility model discloses a main valve oil motor control system and a steam turbine, wherein the control system comprises an oil motor device, a main valve and a main valve, wherein the oil motor device comprises an oil cylinder, a piston rod and a main valve, the piston rod is movably arranged in the oil cylinder, and the piston rod is connected with the main valve; the emergency stop protection device comprises a pressure oil pipeline, three protection electromagnetic valves, three logic valves and an oil return pipeline, wherein the first port of each protection electromagnetic valve is connected with the pressure oil pipeline, the second ports of any two protection electromagnetic valves are connected with the first port and the second port of the same logic valve in a one-to-one correspondence manner, the third ports of the three logic valves are connected with an unloading valve, the oil return pipeline is connected with the first port of the unloading valve, the second port of the unloading valve is connected with a lower chamber of an oil cylinder, and the third ports of the protection electromagnetic valves are connected with the oil return pipeline; the normal operation protection device comprises a first electromagnetic valve, and a pressure oil pipeline is connected with a lower chamber of the oil cylinder through the first electromagnetic valve. The utility model can improve the operation reliability of the main valve oil motor.
Description
Technical Field
The utility model relates to the technical field of steam turbine protection, in particular to a main valve oil motor control system. In addition, the utility model also relates to a steam turbine comprising the main valve oil motor control system.
Background
The steam turbine is a rotary steam power device, the main valve oil engine is a main component of a hydraulic protection system of the steam turbine, and the main valve oil engine can quickly adjust the inlet steam of the main valve under the accident state of the steam turbine so as to achieve the aim of adjusting the rotating speed or the load of the steam turbine, and can realize the opening of the main valve under the normal state of the steam turbine.
At present, a main valve oil motor is controlled by an electromagnetic valve and an unloading valve, once the electromagnetic valve is powered on, the electromagnetic valve controls the unloading valve to build limiting oil, and the oil motor works normally to control the opening of the main valve; if the steam turbine needs emergency stop, the electromagnetic valve controls the unloading valve to unload the limiting oil, and the engine rapidly closes the main valve. However, if the solenoid valve loses power or has a line fault, the main valve cannot be quickly closed and normally opened, and the operation reliability of the main valve oil motor is poor, so that the safe operation of the steam turbine is affected.
In summary, how to provide a main valve oil engine control system with high operation reliability, which can ensure that the main valve is closed quickly and the main valve is opened normally, is a problem to be solved by those skilled in the art.
Disclosure of Invention
Therefore, the present utility model aims to provide a control system for a main valve oil engine, which has high operation reliability and can ensure that the main valve is closed quickly and opened normally.
It is a further object of the present utility model to provide a steam turbine including the main valve engine control system described above.
In order to achieve the above object, the present utility model provides the following technical solutions:
a main valve engine control system comprising:
the oil motor device comprises an oil cylinder, a piston rod and a main valve, wherein the piston rod is movably arranged in the oil cylinder and is connected with the main valve;
an emergency shutdown protection device comprising:
the system comprises a pressure oil pipeline, three protection electromagnetic valves and three logic valves, wherein a first port of each protection electromagnetic valve is connected with the pressure oil pipeline, a second port of any two protection electromagnetic valves is connected with a first port and a second port of the same logic valve in one-to-one correspondence, and a third port of each logic valve is connected with an unloading valve;
the oil return pipeline is connected with the first port of the unloading valve, the second port of the unloading valve is connected with the lower chamber of the oil cylinder, and the third port of each protection electromagnetic valve is connected with the oil return pipeline;
the normal operation protection device comprises a first electromagnetic valve, and the pressure oil pipeline is connected with the lower chamber of the oil cylinder through the first electromagnetic valve.
Preferably, the first electromagnetic valve is a two-position four-way electromagnetic valve, and the pressure oil pipeline is connected with the lower chamber of the oil cylinder through a first port and a second port of the first electromagnetic valve; and the lower chamber of the oil cylinder is connected with the oil return pipeline through a third port and a fourth port of the first electromagnetic valve.
Preferably, the normal operation protection device further comprises a second electromagnetic valve, the lower chamber of the oil cylinder is connected with the oil return pipeline through a first port and a second port of the second electromagnetic valve, a first throttling hole is arranged on a connecting pipeline between the lower chamber of the oil cylinder and the second electromagnetic valve, and a second throttling hole is arranged on a connecting pipeline between the second electromagnetic valve and the oil return pipeline and close to the second port of the second electromagnetic valve.
Preferably, the first electromagnetic valve and the second electromagnetic valve are arranged in parallel.
Preferably, a manual valve is arranged between the lower chamber of the oil cylinder and the oil return pipeline, and the manual valve and the second electromagnetic valve are arranged in parallel.
Preferably, a pressure switch is arranged on a connecting pipeline between the protection electromagnetic valve and the logic valve.
Preferably, the control device is connected with the protection electromagnetic valve, the first electromagnetic valve, the second electromagnetic valve and the pressure switch in a signal manner.
Preferably, the emergency stop protection device further comprises a safety oil pipeline, and the safety oil pipeline is connected with the unloading valve.
A steam turbine comprising a main valve engine control system, the main valve engine control system being any one of the main valve engine control systems described above.
When the main valve oil motor control system provided by the utility model is used, when the main valve is required to be normally opened, any two protection electromagnetic valves are powered on, a first port and a second port of the protection electromagnetic valves are communicated, pressure oil in a pressure oil pipeline flows into an unloading valve through the protection electromagnetic valves and a logic valve, a valve core of the unloading valve is pressed, the first port and the second port of the unloading valve are separated, the pressure oil in the pressure oil pipeline flows into a lower chamber of an oil cylinder through the first electromagnetic valve, a piston rod drives the main valve to move upwards, and the main valve is gradually opened until the main valve is completely opened, so that a steam turbine is started; when the main valve is required to be quickly closed, any two protection electromagnetic valves are powered off, the second port and the third port of the protection electromagnetic valves are connected, pressure oil in the unloading valve flows into the oil return pipeline through the logic valve and the protection electromagnetic valves, the valve core of the unloading valve is pressed gradually to be reduced, the first port and the second port of the unloading valve are communicated, the pressure oil in the lower cavity of the oil cylinder flows into the oil return pipeline through the unloading valve, the piston rod drives the main valve to move downwards, and the main valve is quickly closed, so that the steam turbine is stopped.
Therefore, when the steam turbine is required to be stopped, any two electromagnetic valves of the three protection electromagnetic valves are simultaneously powered off, so that pressure oil in the unloading valve can be discharged, and the first port and the second port of the unloading valve are communicated, thereby rapidly closing the main valve; in addition, when the steam turbine is started, any two electromagnetic valves of the three protection electromagnetic valves are powered on simultaneously, and pressure oil can enter the unloading valve through the protection electromagnetic valves and the logic valve, so that the first port and the second port of the unloading valve are blocked, and the main valve is opened. Therefore, the protection electromagnetic valve adopts a three-in-two mode to control the main valve to be quickly closed and the main valve to be normally opened, so that the operation reliability of the main valve oil motor can be improved, and the safe operation of the steam turbine is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a control system for a main valve engine according to the present utility model.
In the figure:
1 is an oil cylinder, 2 is a piston rod, 3 is a pressure oil pipeline, 4 is an oil return pipeline, 5 is a safety oil pipeline, 6 is a protection electromagnetic valve, 7 is a logic valve, 8 is an unloading valve, 9 is a first electromagnetic valve, 10 is a second electromagnetic valve, 11 is a manual valve, 12 is a pressure switch, 13 is a first throttling hole, and 14 is a second throttling hole;
a first port 61 of the protection electromagnetic valve, a second port 62 of the protection electromagnetic valve, a third port 63 of the protection electromagnetic valve, a first protection electromagnetic valve 64, a second protection electromagnetic valve 65 and a third protection electromagnetic valve 66;
71 is a first port of a logic valve, 72 is a second port of the logic valve, 73 is a third port of the logic valve, 74 is a first logic valve, 75 is a second logic valve, and 76 is a third logic valve;
81 is the first port of the unloading valve, 82 is the second port of the unloading valve;
91 is the first port of the first solenoid valve, 92 is the second port of the first solenoid valve, 93 is the third port of the first solenoid valve, 94 is the fourth port of the first solenoid valve;
101 is the first port of the second solenoid valve and 102 is the second port of the second solenoid valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The core of the utility model is to provide a main valve oil motor control system which has high operation reliability and can ensure the main valve to be closed quickly and the main valve to be opened normally.
Another core of the present utility model is to provide a steam turbine including the above-described main valve engine control system.
It should be noted that relational terms such as first, second, third and fourth are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
Referring to fig. 1, the present utility model provides a main valve oil motor control system, which includes an oil motor device, an emergency stop protection device and a normal operation protection device.
The oil motor device is used for controlling the steam inlet amount of the steam turbine and comprises an oil cylinder 1, a piston rod 2 and a main valve, the piston rod 2 is movably arranged in the oil cylinder 1, the piston rod 2 can move up and down along the inner wall of the oil cylinder 1, and the bottom end of the piston rod 2 is connected with the main valve so as to drive the main valve to move up and down, so that the main valve is opened and closed.
The emergency stop protection pipeline comprises a pressure oil pipeline 3, an oil return pipeline 4, three protection electromagnetic valves 6 and three logic valves 7; the first ports 61 of the protection solenoid valves are all connected with the pressure oil pipeline 3, the second ports 62 of any two protection solenoid valves 6 are connected with the first ports 71 and the second ports 72 of the same logic valve 7 in a one-to-one correspondence manner, and the third ports 73 of the three logic valves 7 are connected with the unloading valve 8.
The three protection solenoid valves 6 are a first protection solenoid valve 64, a second protection solenoid valve 65, and a third protection solenoid valve 66, and the three logic valves 7 are a first logic valve 74, a second logic valve 75, and a third logic valve 76, respectively; the first port of the first logic valve 74 is connected with the second port of the first protection solenoid valve 64, the second port of the first logic valve 74 is connected with the second port of the second protection solenoid valve 65, the first port of the second logic valve 75 is connected with the second port of the second protection solenoid valve 65, the second port of the second logic valve 75 is connected with the second port of the third protection solenoid valve 66, the first port of the third logic valve 76 is connected with the second port of the first protection solenoid valve 64, the second port of the third logic valve 76 is connected with the second port of the third protection solenoid valve 66, and the third ports of the first logic valve 74, the second logic valve 75, and the third logic valve 76 are all connected with the unloading valve 8.
In addition, the valve core of the unloading valve 8 can move up and down along the inner wall of the unloading valve 8, the third port 73 of the logic valve is connected with the upper chamber of the unloading valve 8, and the first port 81 and the second port 82 of the unloading valve are positioned in the lower chamber.
The oil return pipeline 4 is connected with a first port 81 of the unloading valve, a second port 82 of the unloading valve is connected with the lower chamber of the oil cylinder 1, and a third port 63 of each protection electromagnetic valve is connected with the oil return pipeline 4.
The normal operation protection device comprises a first electromagnetic valve 9, and the pressure oil pipeline 3 is connected with a lower chamber of the oil cylinder 1 through the first electromagnetic valve 9.
The logic valve 7 is used for controlling the flow direction of the pressure oil, and when the first port 71 of the logic valve has the pressure oil and/or when the second port 72 of the logic valve has the pressure oil, the third port 73 of the logic valve flows into the pressure oil; the first port 71 and the second port 72 of the logic valve are both connected to the return line 4, and the third port 73 of the logic valve is connected to the return line 4.
When the hydraulic oil cylinder is used, when the main valve is required to be normally opened, any two protection electromagnetic valves 6 are powered on, the first port 61 and the second port 62 of the protection electromagnetic valves are connected, pressure oil in the pressure oil pipeline 3 flows into the unloading valve 8 through the protection electromagnetic valves 6 and the logic valve 7, the valve core of the unloading valve 8 is pressed, the first port 81 and the second port 82 of the unloading valve are separated, then the pressure oil in the pressure oil pipeline 3 flows into the lower chamber of the oil cylinder 1 through the first electromagnetic valve 9, the piston rod 2 drives the main valve to move upwards, and the main valve is gradually opened until the main valve is completely opened, so that the steam turbine is started; when the main valve is required to be quickly closed, any two protection electromagnetic valves 6 are powered off, the second port 62 and the third port 63 of the protection electromagnetic valves are connected, pressure oil in the unloading valve 8 flows into the oil return pipeline 4 through the logic valve 7 and the protection electromagnetic valves 6, the valve core of the unloading valve 8 is gradually reduced in pressure, the first port 81 and the second port 82 of the unloading valve are connected, the pressure oil in the lower cavity of the oil cylinder 1 flows into the oil return pipeline 4 through the unloading valve 8, the piston rod 2 drives the main valve to move downwards, and the main valve is quickly closed, so that the steam turbine is stopped.
Therefore, when the steam turbine is required to be stopped, any two electromagnetic valves of the three protection electromagnetic valves 6 are simultaneously powered off, so that the pressure oil in the unloading valve 8 can be discharged, and the first port 81 and the second port of the unloading valve are communicated, thereby rapidly closing the main valve; in addition, when the steam turbine is started, any two electromagnetic valves of the three protection electromagnetic valves 6 are powered on simultaneously, and pressure oil can enter the unloading valve 8 through the protection electromagnetic valves 6 and the logic valve 7, so that the first port 81 and the second port 82 of the unloading valve are blocked, and the main valve is opened. Therefore, the protection electromagnetic valve 6 controls the main valve to be quickly closed and the main valve to be normally opened in a three-in-two mode, so that the operation reliability of the main valve oil motor can be improved, and the safe operation of the steam turbine is ensured.
Optionally, a servo valve is arranged between the lower chamber of the oil engine and the pressure oil pipeline 3 and the oil return pipeline 4, and when the oil engine works normally, namely the oil engine controls the main valve to be normally opened or closed, the normal action of the oil engine is controlled by the servo valve.
It should be noted that, the main valve needs to be tightly tested, and the main valve needs to be completely closed in the tight test to detect whether the main valve is tightly designed, that is, to check whether the main valve has air leakage or not.
On the basis of the embodiment, the first electromagnetic valve 9 is a two-position four-way electromagnetic valve, and the pressure oil pipeline 3 is connected with the lower chamber of the oil cylinder 1 through a first port 91 and a second port 92 of the first electromagnetic valve; and the lower chamber of the oil cylinder 1 is connected with the oil return pipeline 4 through a third port 93 and a fourth port 94 of the first electromagnetic valve.
Specifically, the first electromagnetic valve 9 adopts a two-position four-way electromagnetic valve, one position of the two-position four-way electromagnetic valve is a first through hole 91 and a second through hole 92, the other position of the two-position four-way electromagnetic valve is a third through hole 93 and a fourth through hole 94, the first through hole 91 and the second through hole 92 of the first electromagnetic valve are communicated with the pressure oil pipeline 3 and the lower chamber of the oil cylinder 1, and the third through hole 93 and the fourth through hole 94 of the first electromagnetic valve are communicated with the oil return pipeline 4 and the lower chamber of the oil cylinder 1. Thus, when the main valve is required to be opened, the first electromagnetic valve 9 is electrified, the first port 91 and the second port 92 of the first electromagnetic valve are connected, and pressure oil flows into the lower chamber of the oil cylinder 1 through the first electromagnetic valve 9; when a tight test is required, the first electromagnetic valve 9 is electrified, the third port 93 and the fourth port 94 of the first electromagnetic valve are communicated, pressure oil in the lower chamber of the oil cylinder 1 flows into the oil return pipeline 4 through the first electromagnetic valve 9, and the piston rod 2 drives the main valve to gradually move upwards so as to gradually close the main valve.
Optionally, the type of the first electromagnetic valve 9 is not unique, and the first electromagnetic valve 9 can be selected according to actual needs, so as to meet the aim of connecting the first electromagnetic valve 9 with the oil return pipeline 4 and the pressure oil pipeline 3 respectively.
It should be noted that, because the main valve is opened for a long time, the main valve needs to perform a movement test to prevent the main valve from being locked and locked, thereby affecting the safe operation reliability of the main valve oil engine.
On the basis of the embodiment, the normal operation protection device further comprises a second electromagnetic valve 10, the lower chamber of the oil cylinder 1 is connected with the oil return pipeline 4 through a first port 101 and a second port 102 of the second electromagnetic valve, a first throttling hole 13 is arranged on a connecting pipeline between the lower chamber of the oil cylinder 1 and the second electromagnetic valve 10, and a second throttling hole 14 is arranged on a connecting pipeline between the second electromagnetic valve 10 and the oil return pipeline 4 and near the second port 102 of the second electromagnetic valve.
The orifice has a function of reducing the diameter of the orifice at a proper position of the pipe, generating static pressure difference on the upstream and downstream sides of the pipe, increasing the flow velocity of the upstream liquid in the orifice area, and greatly reducing the flow velocity as the liquid pressure increases, however, the liquid flows into the downstream expansion area, the velocity decreases, the pressure increases, but the downstream pressure cannot be restored to the upstream pressure, and the orifice has a throttling function.
When the activity test is needed, the closing degree of the main valve corresponds to the downward stroke of the piston rod 2, the apertures of the first throttling hole 13 and the second throttling hole 14 are adjusted according to the closing degree of the main valve, the second electromagnetic valve 10 is electrified, the first through hole 101 and the second through hole 102 of the second electromagnetic valve are connected, the pressure oil in the lower chamber of the oil cylinder 1 flows into the oil return pipeline 4 through the electromagnetic valve, the piston rod 2 drives the main valve to gradually move upwards, the opening degree of the main valve is reduced, the pressure is reduced after the pressure oil is throttled through the first throttling hole 13, namely the pressure on the upper side of the second throttling hole 14 is reduced, and when the pressure on the lower side of the second throttling hole 14 is greater than the upstream pressure, the pressure oil stops flowing into the oil return pipeline 4, so that the pressure oil in the oil cylinder 1 can be prevented from flowing back into the oil return pipeline 4 completely even if the second electromagnetic valve 10 fails, and the main valve is prevented from being completely closed.
On the basis of the embodiment, the first electromagnetic valve 9 and the second electromagnetic valve 10 are arranged between the lower chamber of the oil cylinder 1 and the oil return pipeline 4 in parallel, so that when a movable test is needed, the second electromagnetic valve 10 is electrified, the first port 101 and the second port 102 of the second electromagnetic valve are connected, pressure oil in the oil cylinder 1 flows into the oil return pipeline 4 through the first electromagnetic valve 9, the main valve is gradually closed, in order to ensure that the main valve is not completely closed, the first electromagnetic valve 9 is electrified for a certain time, the electrification time is set according to the closing degree of the main valve, the third port 93 and the fourth port 94 of the first electromagnetic valve are connected, partial pressure oil on the upstream pipeline of the second electromagnetic valve 10 flows into the oil return pipeline 4 through the first electromagnetic valve 9, the pressure on the upstream pipeline is reduced, the pressure on the downstream pipeline of the second electromagnetic valve 10 is larger than the pressure on the upstream pipeline, the pressure oil flowing out from the second port 102 of the second electromagnetic valve is reduced, and accordingly the pressure oil in the oil cylinder 1 is not completely closed.
On the basis of the embodiment, a manual valve 11 is arranged between the lower chamber of the oil cylinder 1 and the oil return pipeline 4, and the manual valve 11 and the second electromagnetic valve 10 are arranged in parallel for manual activity test, so that the downward movement stroke of the piston rod 2 is conveniently controlled, and the main valve is prevented from being completely closed due to the power failure of the second electromagnetic valve 10.
On the basis of the embodiment, the pressure switch 12 is arranged on the connecting pipeline between the protection electromagnetic valve 6 and the logic valve 7, so that the protection electromagnetic valve 6 can be detected on line, the protection electromagnetic valve 6 adjacent to the protection electromagnetic valve 6 is temporarily powered off, and whether the protection electromagnetic valve 6 is normal or not is judged through the pressure switch 12.
On the basis of the above embodiment, the main valve motor control system further includes a control device signal-connected to the protection solenoid valve 6, the first solenoid valve 9, the second solenoid valve 10 and the pressure switch 12 to facilitate remote operation of the main valve motor control system.
On the basis of the embodiment, the emergency shutdown protection device further comprises a safety oil pipeline 5, the safety oil pipeline 5 is connected with the unloading valve 8, specifically, the safety oil pipeline 5 is used for conveying safety oil to the upper chamber of the unloading valve 8, and the safety oil does not have fluidity in a normal state, so that the first port 81 and the second port 82 of the unloading valve are blocked, and the normal opening of the main valve is further ensured.
In addition to the main valve engine control system, the present utility model further provides a steam turbine including the main valve engine control system disclosed in the foregoing embodiment, and the structure of each of the other parts is referred to the prior art, and will not be described herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The main valve oil motor control system and the steam turbine provided by the utility model are described in detail. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (9)
1. A main valve motor control system, comprising:
the oil motor device comprises an oil cylinder, a piston rod and a main valve, wherein the piston rod is movably arranged in the oil cylinder and is connected with the main valve;
an emergency shutdown protection device comprising:
the system comprises a pressure oil pipeline, three protection electromagnetic valves and three logic valves, wherein a first port of each protection electromagnetic valve is connected with the pressure oil pipeline, a second port of any two protection electromagnetic valves is connected with a first port and a second port of the same logic valve in one-to-one correspondence, and a third port of each logic valve is connected with an unloading valve;
the oil return pipeline is connected with the first port of the unloading valve, the second port of the unloading valve is connected with the lower chamber of the oil cylinder, and the third port of each protection electromagnetic valve is connected with the oil return pipeline;
the normal operation protection device comprises a first electromagnetic valve, and the pressure oil pipeline is connected with the lower chamber of the oil cylinder through the first electromagnetic valve.
2. The main valve motor control system of claim 1, wherein the first solenoid valve is a two-position four-way solenoid valve, and the pressure oil line is connected to a lower chamber of the cylinder through a first port and a second port of the first solenoid valve; and the lower chamber of the oil cylinder is connected with the oil return pipeline through a third port and a fourth port of the first electromagnetic valve.
3. The main valve motor control system according to claim 2, wherein the normal operation protection device further comprises a second electromagnetic valve, the lower chamber of the oil cylinder is connected to the oil return pipeline through a first port and a second port of the second electromagnetic valve, a first orifice is arranged on a connecting pipeline between the lower chamber of the oil cylinder and the second electromagnetic valve, and a second orifice is arranged on a connecting pipeline between the second electromagnetic valve and the oil return pipeline and near the second port of the second electromagnetic valve.
4. The main valve engine control system of claim 3, wherein the first solenoid valve is disposed in parallel with the second solenoid valve.
5. The main valve engine control system of claim 4, wherein a manual valve is provided between the lower chamber of the cylinder and the return line, and the manual valve is provided in parallel with the second solenoid valve.
6. The main valve motor control system according to any one of claims 3 to 5, wherein a pressure switch is provided on a connection line between the protection solenoid valve and the logic valve.
7. The main valve engine control system of claim 6, further comprising a control device signally connected to the protection solenoid valve, the first solenoid valve, the second solenoid valve, and the pressure switch.
8. The main valve engine control system according to any one of claims 1 to 5, wherein the emergency stop protection device further includes a safety oil line connected to the unloading valve.
9. A steam turbine comprising a main valve engine control system, wherein the main valve engine control system is as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320646041.2U CN219672697U (en) | 2023-03-29 | 2023-03-29 | Main valve oil motor control system and steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320646041.2U CN219672697U (en) | 2023-03-29 | 2023-03-29 | Main valve oil motor control system and steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219672697U true CN219672697U (en) | 2023-09-12 |
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ID=87892766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320646041.2U Active CN219672697U (en) | 2023-03-29 | 2023-03-29 | Main valve oil motor control system and steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219672697U (en) |
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2023
- 2023-03-29 CN CN202320646041.2U patent/CN219672697U/en active Active
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