Control oil way for tripping device of steam turbine

Abstract

The utility model belongs to the field of steam turbines, and provides a control oil way for a steam turbine tripping device, which comprises an oil supply pipeline, a tripping device, an auxiliary pipeline, an oil inlet pipeline, an electromagnetic valve and a tripping oil switch valve. Wherein the oil supply pipeline is connected to a tripping valve oil cylinder of a target steam turbine; the tripping device forms an oil return port and an oil discharge port which are communicated with each other, a pressure oil inlet and a tripping oil port communicated with the oil supply pipeline are further formed, the tripping device further comprises an execution part which can be impacted by a fly ball on a rotating shaft of the steam turbine to act, and the two ends of the auxiliary pipeline are communicated with the oil supply pipeline and the oil return port respectively; the oil inlet pipeline is communicated with the pressure oil inlet and is used for being connected with external oil supply equipment; the electromagnetic valve is arranged on the auxiliary pipeline and used for controlling opening and closing of the auxiliary pipeline; the tripping oil switch valve is arranged on the oil inlet pipeline and used for controlling opening and closing of the oil inlet pipeline.

Description

Technical Field

[0001] This application belongs to the field of steam turbines, and in particular relates to a control oil circuit for a steam turbine tripping device. Background Technology

[0002] Stable tripping shutdown of steam turbines is a key link in ensuring safe operation of equipment, maintaining production continuity and economic benefits. Its role is to effectively prevent serious equipment damage caused by faults or abnormal operating conditions, avoid production interruption and potential economic losses and environmental risks, and create safe conditions for subsequent maintenance.

[0003] Traditional tripping shutdown is mainly achieved through two independent methods: one is the solenoid valve control type, where the pressure oil in the trip valve cylinder is released through the shutdown solenoid valve, causing the trip valve to close; the other is the mechanical flyweight type, where when the turbine speed exceeds the safety threshold, a flyweight mounted on the shaft strikes the trip linkage mechanism under centrifugal force, directly triggering the trip valve to close. However, in existing technologies, the two tripping methods are independent of each other, and the system relies on only a single tripping mechanism (purely electromagnetic or purely mechanical), resulting in insufficient tripping flexibility and lack of redundancy. Furthermore, mechanical tripping reset requires manual intervention, and the risk of flyweight action cannot be isolated during overspeed tests, making it difficult to meet the safety requirements under complex operating conditions. Therefore, it is necessary to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this application is to provide a control oil circuit for a turbine tripping device to solve the technical problem of the single turbine tripping and shutdown method in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a control oil circuit for a turbine tripping device, comprising:

[0006] The oil supply pipeline is connected to the trip valve cylinder of the target steam turbine;

[0007] The tripping device forms an interconnected return oil port and an oil drain port, as well as a pressure oil inlet and a tripping oil port connected to the oil supply pipeline. The tripping device also includes an actuator that can be actuated by the impact of a flyweight on the turbine shaft. The actuator is in a normal state when the target turbine is below the safe speed and in a tripped state when the target turbine exceeds the safe speed. When the actuator is in the normal state, the tripping oil port is connected to the pressure oil inlet. When the actuator is in the tripped state, the pressure oil inlet is blocked and the tripping oil port is connected to the oil drain port.

[0008] An auxiliary pipeline is connected at both ends to the oil supply pipeline and the oil return port, respectively.

[0009] An oil inlet pipe is connected to the pressure oil inlet and is used to connect to an external oil supply device;

[0010] A solenoid valve is installed on the auxiliary pipeline and is used to control the opening and closing of the auxiliary pipeline;

[0011] A trip oil switch valve is installed on the oil inlet pipe and is used to control the opening and closing of the oil inlet pipe.

[0012] Optionally, the control oil circuit for the turbine tripping device further includes an overspeed test pipeline and an overspeed test valve;

[0013] The trip port is connected to the oil supply pipeline through the overspeed test pipeline, and the overspeed test valve is installed on the overspeed test pipeline and used to control the opening and closing of the overspeed test pipeline.

[0014] Optionally, the tripping device further includes a reset port that can reset the actuator to the normal state by injecting hydraulic oil;

[0015] The control oil circuit for the turbine tripping device also includes a reset oil pipe, a pressure relief oil pipe, a reset switch valve, and a pressure relief valve. The reset oil pipe and the pressure relief oil pipe are respectively connected to the reset oil port. The reset switch valve is installed on the reset oil pipe and is used to control the opening and closing of the reset oil pipe. The pressure relief valve is installed on the pressure relief oil pipe and is used to control the opening and closing of the pressure relief oil pipe.

[0016] Optionally, the end of the pressure relief oil pipe away from the reset oil port is connected to the return oil port.

[0017] Optionally, the end of the reset oil pipe away from the reset oil port is connected to the oil inlet pipe, and the trip oil switch valve is located between the tripping device and the port of the reset oil pipe used to communicate with the oil inlet pipe.

[0018] Optionally, the control oil circuit for the turbine tripping device further includes a position sensor for detecting the status of the actuator;

[0019] The position sensor is communicatively connected to the position beacon device.

[0020] Optionally, the control oil circuit for the turbine tripping device further includes a flange orifice plate connected to the end of the oil inlet pipe and used to control the amount of oil entering the oil inlet pipe.

[0021] The beneficial effects of the control oil circuit for the turbine tripping device provided in this application are as follows: Compared with the prior art, in the control oil circuit for the turbine tripping device provided in this application, when the turbine is below the safe speed, the actuator maintains a normal state. The pressure oil is connected from the oil inlet pipe through the pressure oil inlet of the tripping device and the tripping oil port, and then continuously supplied to the tripping valve cylinder through the oil supply pipe, so that the tripping valve remains open; if the turbine overspeeds and triggers the mechanical hammer to strike the actuator, the actuator switches to the tripping state, at which time the pressure oil inlet is blocked. When the trip valve oil port is switched to the drain port, the pressurized oil in the trip valve cylinder flows back to the trip device through the oil supply pipeline and is depressurized through the drain port, causing the trip valve cylinder to lose pressure. This causes the piston end to retract, and the turbine inlet valve loses its opening force and closes, thus shutting down the turbine. Simultaneously, when the solenoid valve is opened under control, the auxiliary pipeline is opened, and the pressurized oil in the oil supply pipeline is directly released through the auxiliary pipeline and the return port. This also causes the trip valve cylinder to lose pressure, its piston end to retract, and the turbine inlet valve loses its opening force and closes, thus shutting down the turbine. In this way, the turbine trip device provided in this application can achieve both mechanical hammer overspeed tripping and solenoid valve remote tripping using the control oil circuit, forming a dual redundancy guarantee and significantly improving the safety and response flexibility of the turbine tripping. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the control oil circuit for the turbine tripping device in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram illustrating the working principle of the control oil circuit of the turbine tripping device in normal state in the embodiments of this application;

[0025] Figure 3 This is a schematic diagram illustrating the working principle of the control oil circuit of the turbine tripping device in the tripping state in the embodiments of this application.

[0026] The reference numerals in the figures are as follows: 100, oil supply pipe; 200, tripping device; 201, oil return port; 202, oil drain port; 203, pressure oil inlet; 204, tripping oil port; 205, actuator; 2051, right piston; 2052, intermediate piston; 2053, left piston; 206, reset oil port; 300, auxiliary pipe; 301, solenoid valve; 400, oil inlet pipe; 401, tripping oil switch valve; 500, overspeed test pipe; 501, overspeed test valve; 601, reset oil pipe; 602, pressure relief oil pipe; 603, reset switch valve; 604, pressure relief valve; 700, position sensor; 800, flange orifice plate; 1000, tripping valve cylinder. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] Please refer to the following: Figures 1 to 3 The control oil circuit for a turbine tripping device provided in this application embodiment will now be described. This control oil circuit for the turbine tripping device includes an oil supply pipe 100, a tripping device 200, an auxiliary pipe 300, an oil inlet pipe 400, a solenoid valve 301, and a tripping oil switch valve 401. Wherein:

[0032] The oil supply pipe 100 is connected to the trip valve cylinder 1000 of the target steam turbine (not shown in the attached figure). The trip valve cylinder 1000 is used to provide opening force to the steam inlet valve of the target steam turbine. That is, the trip valve cylinder 1000 described in this embodiment is a common structure on steam turbines in the art. When pressurized oil is injected into the cylinder, it can push the piston rod to overcome the spring force and extend, forcibly opening the steam inlet valve of the steam turbine, thereby maintaining the normal operation of the steam turbine. When the pressurized oil in the cylinder is released through the oil circuit, the spring rebounds instantly after losing the oil pressure resistance, pulling the piston rod back and urgently closing the steam inlet valve of the steam turbine to achieve shutdown.

[0033] The tripping device 200 forms an interconnected return oil port 201 and an oil drain port 202, as well as a pressure oil inlet 203 and a tripping oil port 204 connected to the oil supply pipeline 100. The tripping device 200 also includes an actuator 205 that can be actuated by impact from a flyweight on the turbine shaft. The actuator 205 is in a normal state when the target turbine is below the safe speed and in a tripped state when the target turbine exceeds the safe speed. When the actuator 205 is in the normal state, the tripping oil port 204 is connected to the pressure oil inlet 203. When the actuator 205 is in the tripped state, the pressure oil inlet 203 is blocked and the tripping oil port 204 is connected to the oil drain port 202. In this embodiment, the flyweight on the turbine shaft can be stretched in the circumferential direction due to centrifugal force until it impacts the actuator 205, thereby triggering the actuator 205 to act.

[0034] The auxiliary pipeline 300 is connected to the oil supply pipeline 100 and the oil return port 201 at both ends, respectively; the oil inlet pipeline 400 is connected to the pressure oil inlet 203 and is used to connect to the external oil supply equipment; the solenoid valve 301 is installed on the auxiliary pipeline 300 and is used to control the opening and closing of the auxiliary pipeline 300; the trip oil switch valve 401 is installed on the oil inlet pipeline 400 and is used to control the opening and closing of the oil inlet pipeline 400.

[0035] According to the structure provided in this embodiment, in the control oil circuit of the turbine tripping device provided in this embodiment, when the turbine is below the safe speed, the actuator 205 maintains a normal state. Pressure oil flows from the oil inlet pipe 400 through the pressure oil inlet 203 of the tripping device 200 and connects with the tripping port 204, and is then continuously supplied to the tripping valve cylinder 1000 through the oil supply pipe 100, keeping the tripping valve open. If the turbine overspeeds and triggers a mechanical hammer to strike the actuator 205, the actuator 205 switches to the tripping state. At this time, the pressure oil inlet 203 is blocked, and the tripping port 204 connects with the drain oil. When port 202 is connected, the pressurized oil in the trip valve cylinder 1000 flows back to the trip device 200 through the oil supply pipe 100 and is depressurized through the drain port 202, causing the trip valve cylinder 1000 to lose pressure, its piston end to retract, and the turbine inlet valve to lose its opening force and close, thereby shutting down the turbine. Simultaneously, when the solenoid valve 301 is opened under control, the auxiliary pipe 300 is opened, and the pressurized oil in the oil supply pipe 100 is directly released through the auxiliary pipe 300 and the return port 201, causing the trip valve cylinder 1000 to lose pressure, its piston end to retract, and the turbine inlet valve to lose its opening force and close, thereby shutting down the turbine. Thus, the turbine trip device provided in this embodiment can achieve both mechanical hammer overspeed tripping and remote tripping by the solenoid valve 301 using the control oil circuit, forming dual redundancy protection and significantly improving the safety and response flexibility of the turbine tripping.

[0036] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The control oil circuit for the turbine tripping device also includes an overspeed test pipeline 500 and an overspeed test valve 501; the tripping oil port 204 is connected to the oil supply pipeline 100 through the overspeed test pipeline 500, and the overspeed test valve 501 is installed on the overspeed test pipeline 500 and is used to control the opening and closing of the overspeed test pipeline 500.

[0037] According to the structure provided in this embodiment, when the overspeed test valve 501 is closed (i.e., during an overspeed test), the overspeed test pipeline 500 is cut off. At this time, even if the turbine overspeeds and triggers the flyweight to strike the actuator 205, causing it to switch to the tripped state (in this state, the tripped oil port 204 is connected to the oil drain port 202, see detailed reference) Figure 3At this time, the oil passage between the right piston 2051 and the middle piston 2052 in the trip device 200 is located in the area between the trip port 204, the drain port 202, and the return port 201. Thus, the trip port 204 and the drain port 202 are connected, and the return port 201 is also connected. The oil circuit from the oil supply pipeline 100 to the trip valve cylinder 1000 remains closed due to the isolation effect of the overspeed test valve 501. The pressurized oil cannot be released from the trip port 204 to the drain port 202, thereby maintaining the oil pressure stability in the trip valve cylinder 1000 and ensuring that the turbine inlet valve remains open. When the overspeed test valve 501 is opened, the overspeed test pipeline 500 is connected, and the oil circuit returns to the basic trip function state. Based on this design, closing the overspeed test valve 501 during the turbine overspeed test can physically isolate the impact of the fly hammer tripping action on the trip valve cylinder 1000. This allows the speed to be safely increased above the mechanical tripping threshold to verify the fly hammer performance, while also preventing accidental shutdown.

[0038] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The tripping device 200 also includes a reset port 206 that can reset the actuator 205 to a normal state by injecting hydraulic oil; the control oil circuit for the turbine tripping device also includes a reset oil pipe 601, a pressure relief oil pipe 602, a reset switch valve 603, and a pressure relief valve 604. The reset oil pipe 601 and the pressure relief oil pipe 602 are respectively connected to the reset port 206. The reset switch valve 603 is installed on the reset oil pipe 601 and is used to control the opening and closing of the reset oil pipe 601. The pressure relief valve 604 is installed on the pressure relief oil pipe 602 and is used to control the opening and closing of the pressure relief oil pipe 602.

[0039] According to the structure provided in this embodiment, when the actuator 205 is in a disengaged state due to the impact of the hammer, the pressure relief valve 604 can be closed first to seal the pressure relief path of the reset oil port 206, and the reset switch valve 603 can be opened at the same time. In this way, the pressure oil is injected into the tripping device 200 from the oil inlet pipe 400 through the reset oil pipe 601, acting on the left end of the left piston 2053 inside, thereby causing the left piston 2053, the middle piston 2052, the right piston 2051 connected at a set interval, and the actuator 205 connected to the right end of the right piston 2051 to move towards the normal position. That is, through this operation, the actuator 205 can be mechanically reset to the normal state (at this time, the focus is on referring to...). Figure 2As shown, the pressure oil inlet 203 is connected through the gap between the intermediate piston 2052 and the right piston 2051 and the trip oil port 204. At the same time, the return oil port 201 and the drain oil port 202 are connected through the gap between the left piston 2053 and the intermediate piston 2052. The intermediate piston 2052 completes the sealing and isolation between its two sides. After the reset is completed, the reset switch valve 603 is closed and the pressure relief valve 604 is opened, so that the pressure oil in the left end of the left piston 2053 in the trip device 200 flows back through the pressure relief oil pipe 602 and the drain oil port 202 and the return oil port 201 and merges into the main return oil circuit of the system, so that the pressure at the left end of the left piston 2053 disappears, and the actuator 205 can be triggered normally again. In this embodiment, the above-described pipeline design not only enables the hydraulically driven automatic reset of the actuator 205, completely replacing the traditional manual lifting operation and eliminating the safety risks and time costs of the reset operation, but also ensures the accuracy and reliability of the reset action, allowing the tripping device 200 to quickly return to standby mode, significantly improving the turbine start-up and shutdown efficiency and maintenance convenience. Specifically, after the actuator 205 is mechanically reset to the normal state, the tripping oil switch valve 401 is opened. The pressurized oil from the oil inlet pipe 400 can enter the overspeed test pipe 500 of the overspeed test valve 501 through the gap between the right piston 2051 and the middle piston 2052 via the pressurized oil inlet 203 and the tripping oil port 204. The overspeed test pipe 500 is then supplied to the tripping valve cylinder 1000 by the oil supply pipe 100, thereby enabling the tripping device 200 to quickly return to standby mode. Restore standby; it can be understood that in this embodiment, the liquid-receiving area of ​​the right piston 2051 is greater than that of the middle piston 2052. The resulting pressure difference causes the right piston 2051 to tend to move towards the actuator 205 to keep the actuator 205 in a normal state (standby state). In this way, the pressure oil supplied through the oil inlet pipe 400 can keep the tripping device 200 in a stable standby state. At the same time, it should be noted that the specific value of the liquid-receiving area of ​​the right piston 2051 being greater than that of the middle piston 2052 can be calculated based on the minimum impact force of the fly hammer striking the actuator 205 when it is disengaged. That is, as long as the force that keeps the actuator 205 in the extended state due to the difference in liquid-receiving areas between the right piston 2051 and the middle piston 2052 is less than the minimum impact force of the fly hammer striking the actuator 205 when it is disengaged.

[0040] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3The end of the pressure relief oil pipe 602 away from the reset port 206 is connected to the return port 201. According to the structure provided in this embodiment, the pressure relief oil pipe 602 directly connects the reset port 206 to the return port 201 of the trip device 200 itself. When the actuator 205 completes hydraulic reset and opens the pressure relief valve 604, the pressure oil in the left end of the left piston 2053 in the trip device 200 is connected to the drain port 202 through the pressure relief oil pipe 602 and flows into the main return oil circuit of the system through the return port 201 of the trip device 200, so that the pressure at the left end of the left piston 2053 disappears. There is no need to add an external oil drain pipe or container. This can completely avoid the oil splashing, environmental pollution and maintenance burden caused by the traditional independent oil drain method. At the same time, it simplifies the oil circuit structure, reduces the risk of leakage, and ensures the cleanliness and operational stability of the system oil.

[0041] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The end of the reset oil pipe 601 away from the reset oil port 206 is connected to the oil inlet pipe 400. The trip oil switch valve 401 is located between the pressure oil inlet 203 of the trip device 200 and the port of the reset oil pipe 601 that is used to communicate with the oil inlet pipe 400. According to the above structure provided in this embodiment, when the actuator 205 needs to be hydraulically reset, the reset switch valve 603 is opened. At this time, external pressure oil can be diverted to the reset oil pipe 601 through the oil inlet pipe 400, thereby directly injecting into the reset oil port 206 to push the actuator 205 to reset. During this process, the trip oil switch valve 401 can be opened, or it can be opened after the actuator 205 is reset, thereby supplying pressure oil to the trip valve cylinder 1000 to open the turbine inlet valve. This can completely eliminate the complexity of the traditional system requiring additional high-pressure oil pumps or bypass oil circuits, and greatly simplify the pipeline layout.

[0042] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3The control oil circuit for the turbine tripping device also includes a position sensor 700 for detecting the status of the actuator 205. The position sensor 700 is communicatively connected to a positioning beacon device, which typically uses red and green indicator lights. When the actuator 205 is reset to its normal position, the green light is constantly on; when a tripping operation occurs, the red light illuminates. According to the structure provided in this embodiment, the position sensor 700 can monitor the status of the actuator 205 (normal or tripped) in real time and transmit the status signal to the beacon device for display. When the actuator 205 trips due to a flyweight trip or is remotely switched to the tripped state via the solenoid valve 301, the red light illuminates. During the process of injecting reset pressure oil into the tripping device 200 through the reset switch valve 603, when the green light illuminates, it indicates that the reset is complete, and the pressure relief valve 604 can be opened to release pressure at the left end of the left piston 2053. In this embodiment, the linkage between the sensor 700 and the indicator device completely replaces the traditional process of manually judging the status of the actuator 205, which significantly improves system response speed and operational safety.

[0043] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The control oil circuit for the turbine tripping device also includes a flange orifice plate 800 connected to the end of the oil inlet pipe 400 and used to control the amount of oil entering the oil inlet pipe 400. According to the structure provided in this embodiment, the flange orifice plate 800 can quickly adjust the flow rate in the oil inlet pipe 400 through connecting holes of different diameters. This allows the control oil circuit for the turbine tripping device in this embodiment to be applicable to more operating conditions and to have good reliability.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control oil circuit for a steam turbine tripping device, characterized in that, include: The oil supply pipeline (100) is connected to the trip valve cylinder (1000) of the target steam turbine. The tripping device (200) forms an interconnected return oil port (201) and an oil drain port (202), and also forms a pressure oil inlet (203) and a tripping oil port (204) connected to the oil supply pipeline (100). The tripping device (200) also includes an actuator (205) that can be actuated by the impact of the fly hammer on the turbine shaft. The actuator (205) forms a normal state when the target turbine is below the safe speed and forms a tripping state when the target turbine exceeds the safe speed. When the actuator (205) is in the normal state, the tripping oil port (204) is connected to the pressure oil inlet (203). When the actuator (205) is in the tripping state, the pressure oil inlet (203) is blocked and the tripping oil port (204) is connected to the oil drain port (202). An auxiliary pipeline (300) is connected at both ends to the oil supply pipeline (100) and the oil return port (201), respectively. An oil inlet pipe (400) is connected to the pressure oil inlet (203) and is used to connect to an external oil supply device; A solenoid valve (301) is disposed on the auxiliary pipe (300) and used to control the opening and closing of the auxiliary pipe (300); A trip oil switch valve (401) is provided on the oil inlet pipe (400) and is used to control the opening and closing of the oil inlet pipe (400).

2. The control oil circuit for the turbine tripping device as described in claim 1, characterized in that: The control oil circuit for the turbine tripping device also includes an overspeed test pipeline (500) and an overspeed test valve (501). The trip port (204) is connected to the oil supply pipe (100) through the overspeed test pipe (500), and the overspeed test valve (501) is installed on the overspeed test pipe (500) and used to control the opening and closing of the overspeed test pipe (500).

3. The control oil circuit for the turbine tripping device as described in claim 1, characterized in that: The tripping device (200) also includes a reset port (206) that can reset the actuator (205) to the normal state by injecting hydraulic oil. The control oil circuit for the turbine tripping device also includes a reset oil pipe (601), a pressure relief oil pipe (602), a reset switch valve (603), and a pressure relief valve (604). The reset oil pipe (601) and the pressure relief oil pipe (602) are respectively connected to the reset oil port (206). The reset switch valve (603) is installed on the reset oil pipe (601) and is used to control the opening and closing of the reset oil pipe (601). The pressure relief valve (604) is installed on the pressure relief oil pipe (602) and is used to control the opening and closing of the pressure relief oil pipe (602).

4. The control oil circuit for the turbine tripping device as described in claim 3, characterized in that: The end of the pressure relief oil pipe (602) away from the reset oil port (206) is connected to the return oil port (201).

5. The control oil circuit for the turbine tripping device as described in claim 3, characterized in that: The end of the reset oil pipe (601) away from the reset oil port (206) is connected to the oil inlet pipe (400), and the trip oil switch valve (401) is located between the trip device (200) and the port of the reset oil pipe (601) for communicating with the oil inlet pipe (400).

6. The control oil circuit for the turbine tripping device as described in claim 5, characterized in that: The control oil circuit for the turbine tripping device also includes a position sensor (700) for detecting the status of the actuator (205). The position sensor (700) is communicatively connected to the position beacon device.

7. The control oil circuit for the turbine tripping device as described in any one of claims 1-6, characterized in that: The control oil circuit for the turbine tripping device also includes a flange orifice plate (800) connected to the end of the oil inlet pipe (400) and used to control the amount of oil entering the oil inlet pipe (400).

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