A full-automatic control device for start-stop process of steam turbine
Patent Information
- Application Number
- CN202522537258.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-28
AI Technical Summary
In the current steam turbine start-up and shutdown process, the gas flow control accuracy is low and there is a lack of a fully automatic and precise adjustment mechanism, which leads to unstable speed increase and affects the stability and safety of the start-up and shutdown process.
The system uses a hydraulic cylinder to drive the piston to move axially within the tank, adjusting the flow gap between the inlet and outlet pipes. Combined with an integrated mechanism of guide rails, sliders, clamps, and turntables, it automatically clamps or releases the control module. The integrated box contains the control module and auxiliary components, enabling precise control and convenient maintenance of high-temperature and high-pressure gases.
It achieves fully automatic and precise gas flow control during the turbine start-up and shutdown process, improves the stability and automation level of the start-up and shutdown process, simplifies the maintenance process of the control module, and has a high degree of device integration and clear connection relationship.
Smart Images
Figure CN224931715U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steam turbine control technology, and in particular to a fully automatic control device for the start-up and shutdown process of a steam turbine. Background Technology
[0002] As a large rotating thermal power equipment, the start-up and shutdown process of steam turbines is a critical stage in the operation of power plants, involving complex changes in operating conditions and strict safety requirements.
[0003] During the turbine startup process, the flow rate of the high-temperature and high-pressure working gas (such as steam) entering the cylinder needs to be controlled with extreme precision in order to achieve stable warm-up, speed-up and grid connection operations.
[0004] However, some existing control devices have relatively crude gas flow regulation mechanisms when executing start-up and shutdown procedures, relying heavily on traditional valve switching control and lacking high-precision, continuously adjustable automation methods.
[0005] This lack of control precision makes it difficult to achieve a smooth flow curve during the acceleration process, which can easily cause fluctuations in turbine speed or uneven thermal stress, affecting the stability, safety and automation level of the start-up and shutdown process.
[0006] Therefore, this utility model proposes a fully automatic control device for the start-up and shutdown process of a steam turbine to overcome the shortcomings of the prior art. Utility Model Content
[0007] To overcome the above shortcomings, this utility model provides a fully automatic control device for the start-up and shutdown process of a steam turbine, which aims to improve the problems of low gas flow control accuracy and lack of fully automatic and precise adjustment mechanism in some existing fully automatic control devices for the start-up and shutdown process of steam turbines, resulting in unstable speed increase.
[0008] This utility model provides a fully automatic control device for the start-up and shutdown process of a steam turbine, including: a base, an integrated box fixedly connected to the base, a control module disposed in the integrated box, and a control mechanism, wherein the control mechanism includes a tank, an air inlet pipe and an air outlet pipe fixedly connected to the tank; and a hydraulic cylinder, a piston and a hydraulic rod.
[0009] The piston is slidably disposed inside the tank body, and the hydraulic cylinder is fixedly connected to the top of the tank body.
[0010] Furthermore, the hydraulic rod is fixedly connected to the drive end of the hydraulic cylinder and fixedly connected to the bottom of the piston; the control module is electrically connected to and controls the hydraulic cylinder, and the piston reciprocates axially inside the tank through the drive of the hydraulic cylinder to adjust the flow gap between the air inlet pipe and the air outlet pipe.
[0011] Preferably, the control mechanism further includes a support block and a fixing plate; the support block is fixedly connected to the top of the tank, the fixing plate is fixedly connected to the top of the support block, and the hydraulic cylinder is fixedly connected to the top of the fixing plate.
[0012] Preferably, it also includes auxiliary components; the auxiliary components include a housing, the air outlet pipe is connected to the housing, and a rotor, which is the controlled object, is installed inside the housing.
[0013] Preferably, the auxiliary components further include a support plate and a pipe; the support plate is fixedly connected to the base, the housing is securely connected to the base and supported on the support plate, and the pipe is fixedly connected to one side of the housing.
[0014] Preferably, the auxiliary components further include an exhaust pipe and a rotating rod; the exhaust pipe is fixedly connected to the top of the housing, and the rotating rod is fixedly connected to one side of the rotor.
[0015] Preferably, the door of the integrated box is movably connected.
[0016] Preferably, it also includes an integrated mechanism; the integrated mechanism includes a base plate and a cross plate; the base plate is fixedly connected to the inside of the door, and the cross plate is fixedly connected to the top of the base plate.
[0017] Preferably, the integrated mechanism further includes a guide rail, a slider, and a clamping plate; the guide rail is fixedly connected to the top of the cross plate, the slider is slidably connected to the top of the guide rail, and the clamping plate is fixedly connected to the top of the slider, the clamping plate being used to clamp the control module.
[0018] Preferably, the integrated mechanism further includes a rotating column, a connecting rod, and a turntable; the rotating column is fixedly connected to the top of the slider and the top of the turntable, respectively, and the turntable is rotatably connected to the slider through the connecting rod, and the rotation of the turntable drives the clamping plate to move radially.
[0019] This utility model has the following beneficial effects:
[0020] 1. This utility model solves the problem in the prior art that the turbine start-up and shutdown process relies on manual adjustment or has low control precision, resulting in unstable speed increase and low degree of automation. It achieves the technical effect of fully automatic and precise control of working gas flow and improves the stability of the start-up and shutdown process. By setting up a hydraulic cylinder electrically connected and controlled by a control module, and driving the hydraulic rod and piston to move axially inside the tank to adjust the flow gap between the inlet pipe and the outlet pipe, this utility model solves the problem of the turbine start-up and shutdown process relying on manual adjustment or low control precision, resulting in unstable speed increase and low degree of automation.
[0021] 2. This utility model, by setting an integrated mechanism including a guide rail, a slider, a clamping plate, a turntable and a connecting rod, uses the rotation of the turntable to drive the clamping plate to automatically clamp or release the control module, which solves the problem that existing control modules are mostly fixed with bolts, resulting in cumbersome maintenance and replacement, and time and effort. It achieves the technical effect of automated maintenance and convenient replacement of control modules.
[0022] 3. This utility model solves the problems of existing control devices being separated from the turbine body, having a scattered layout, and poor protection by setting up an auxiliary component including a casing and a rotor, connecting the exhaust pipe of the control mechanism to the casing, and setting the control module and integrated mechanism in an integrated box. It achieves the technical effect of highly integrated device structure, compact layout, clear connection relationship, and effective protection of core control components. Attached Figure Description
[0023] Figure 1 This is a three-dimensional schematic diagram of a fully automatic control device for the start-up and shutdown process of a steam turbine proposed in this utility model;
[0024] Figure 2 This is a schematic diagram of the structure of the vibration block of a fully automatic control device for the start-up and shutdown process of a steam turbine proposed in this utility model;
[0025] Figure 3 This is a schematic diagram of the scraper structure of a fully automatic control device for the start-up and shutdown process of a steam turbine proposed in this utility model;
[0026] Figure 4 This is a schematic diagram of the rotating column of a fully automatic control device for the start-up and shutdown process of a steam turbine proposed in this utility model.
[0027] Legend:
[0028] 1. Base;
[0029] 2. Auxiliary components; 21. Support plate; 22. Housing; 23. Pipes; 24. Rotor; 25. Rotating rod; 26. Integrated box; 27. Box door; 28. Exhaust pipe;
[0030] 3. Integrated mechanism; 31. Base plate; 32. Cross plate; 33. Guide rail; 34. Slider; 35. Clamping plate; 36. Rotating column; 37. Connecting rod; 38. Turntable; 39. Control module;
[0031] 4. Control mechanism; 41. Tank body; 42. Support block; 43. Fixing plate; 44. Hydraulic cylinder; 45. Hydraulic rod; 46. Piston; 47. Air inlet pipe; 48. Air outlet pipe. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Reference Figures 1 to 4 This utility model provides a fully automatic control device for the start-up and shutdown process of a steam turbine, which aims to solve the problems of low accuracy in the control of high-temperature and high-pressure gas flow and lack of a fully automatic and precise adjustment mechanism in the prior art during the start-up process of a steam turbine.
[0034] like Figure 1 As shown, the device includes a base 1 and an integrated box 26 fixedly connected to the base 1. The base 1 provides a stable installation and support foundation for the entire device. The integrated box 26 houses a control module 39 and is used to accommodate and protect the control module 39.
[0035] Reference Figure 1 and Figure 2 The control mechanism 4 includes a tank 41 and a hydraulic cylinder 44 fixedly connected to the top of the tank 41. The tank 41 is fixedly connected to an air inlet pipe 47 and an air outlet pipe 48. The driving end of the hydraulic cylinder 44 is fixedly connected to a hydraulic rod 45. A piston 46 is slidably disposed inside the tank 41 and is fixedly connected to the bottom of the hydraulic rod 45. The control module 39 is electrically connected to and controls the hydraulic cylinder 44. The hydraulic cylinder 44 drives the hydraulic rod 45 to drive the piston 46 to reciprocate axially inside the tank 41. This movement adjusts the flow gap between the air inlet pipe 47 and the air outlet pipe 48 to achieve precise control of the gas flow rate.
[0036] Reference Figure 1 The auxiliary component 2 includes a housing 22, which is securely connected to the base 1 to house the core moving parts. To enhance connection stability, the auxiliary component 2 also includes a support plate 21, which is fixedly connected to the base 1 and provides support for the housing 22. A rotor 24 is installed inside the housing 22. A rotating rod 25 is fixedly connected to one side of the rotor 24 to transmit the rotational motion and power of the rotor 24. An exhaust pipe 28 is fixedly connected to the top of the housing 22 to discharge exhaust gas after operation. A pipe 23 is fixedly connected to one side of the housing 22.
[0037] In the assembled state, the exhaust pipe 48 of the control mechanism 4 is connected to the casing 22. This connection method allows the high-temperature and high-pressure gas, which has been precisely adjusted by the control mechanism 4, to be directly introduced into the casing 22 to drive the rotor 24 to rotate at high speed, thereby realizing the precise conversion of control commands into the mechanical motion of the steam turbine.
[0038] Reference Figure 2 In order to provide a stable mounting base for the hydraulic cylinder 44, the control mechanism 4 also includes a support block 42 and a fixing plate 43. The support block 42 is fixedly connected to the top of the tank body 41, the fixing plate 43 is fixedly connected to the top of the support block 42, and the hydraulic cylinder 44 is fixedly connected to the top of the fixing plate 43. This hierarchical fixing structure ensures the high stability and reliability of the hydraulic cylinder 44 during operation.
[0039] Reference Figure 1 The integrated box 26 is also provided with a door 27, which is movably connected to one side of the integrated box 26 to protect the control module 39 and other structures installed inside.
[0040] Reference Figure 1 and Figure 4 The device also includes an integration mechanism 3, which is located inside the integration box 26. The integration mechanism 3 includes a base plate 31, which is fixedly connected to the inside of the box door 27, and a cross plate 32 is fixedly connected to the top of the base plate 31.
[0041] Reference Figure 4 The integrated mechanism 3 also includes a guide rail 33, a slider 34, and a clamping plate 35. The guide rail 33 is fixedly connected to the top of the cross plate 32 to provide guidance for the movement. The slider 34 is slidably connected to the top of the guide rail 33. The clamping plate 35 is fixedly connected to the top of the slider 34 and is used to clamp the control module 39. The integrated mechanism 3 also includes a rotating column 36, a connecting rod 37, and a turntable 38. The rotating column 36 is fixedly connected to the top of the slider 34 and the top of the turntable 38, respectively. The turntable 38 is rotatably connected to the slider 34 through the connecting rod 37. This structure allows the rotation of the turntable 38 to drive the clamping plate 35 to move radially, so as to realize the automatic clamping or loosening of the control module 39.
[0042] The implementation principle of this application embodiment is as follows: When the steam turbine needs to be started, the operator or the main control system sends a command to the control module 39 through the integrated box 26. The control module 39 is electrically connected to and controls the hydraulic cylinder 44 of the control mechanism 4 to start. The hydraulic cylinder 44 drives the hydraulic rod 45, and the hydraulic rod 45 drives the piston 46 to move axially inside the tank 41. The movement of the piston 46 precisely adjusts the flow gap between the inlet pipe 47 and the outlet pipe 48, thereby automatically controlling the flow rate of high temperature and high pressure gas through the outlet pipe 48. This controlled gas enters the casing 22 of the auxiliary component 2, pushing the rotor 24 to rotate. The rotor 24 drives the rotating rod 25 to output power, realizing precise control of the steam turbine start-up and shutdown process. The working exhaust gas is finally discharged through the exhaust pipe 28.
[0043] When maintenance or replacement of the control module 39 is required, the integrated mechanism 3 is activated, and the turntable 38 of the integrated mechanism 3 rotates. The turntable 38 drives the slider 34 through the rotating connecting rod 37 and the rotating column 36. The slider 34 is slidably connected to the guide rail 33 on the top of the cross plate 32. The radial movement of the slider 34 drives the fixedly connected clamping plate 35 to loosen or clamp the control module 39, realizing the automatic replacement of the control module. Throughout the process, the base 1, support plate 21, support block 42, fixed plate 43 and box door 27 and other structures provide reliable support for the stable operation and internal protection of the device.
Claims
1. A fully automatic control device for the start-up and shutdown process of a steam turbine, comprising: The base (1), the integrated box (26) fixedly connected to the base (1), the control module (39) set in the integrated box (26), and the control mechanism (4) are also included. The control mechanism (4) is used to adjust the flow rate of the working gas of the steam turbine. The control mechanism (4) includes a tank (41), an inlet pipe (47) and an outlet pipe (48) fixedly connected to the tank (41). Its features are, The control mechanism (4) also includes: Hydraulic cylinder (44), which is fixedly connected to the top of the tank body (41); Piston (46), which is slidably disposed inside the tank (41); Hydraulic rod (45), which is fixedly connected to the drive end of the hydraulic cylinder (44) and fixedly connected to the bottom of the piston (46); The control module (39) is electrically connected to and controls the hydraulic cylinder (44). The piston (46) moves axially back and forth inside the tank (41) driven by the hydraulic cylinder (44) to adjust the flow gap between the inlet pipe (47) and the outlet pipe (48), thereby achieving precise control of the gas flow rate when the steam turbine starts.
2. The fully automatic control device for the start-up and shutdown process of a steam turbine according to claim 1, characterized in that, The control mechanism (4) further includes a support block (42) and a fixing plate (43). The support block (42) is fixedly connected to the top of the tank (41), the fixing plate (43) is fixedly connected to the top of the support block (42), and the hydraulic cylinder (44) is fixedly connected to the top of the fixing plate (43).
3. The fully automatic control device for the start-up and shutdown process of a steam turbine according to claim 1, characterized in that, It also includes an auxiliary component (2), which includes a housing (22), the exhaust pipe (48) is connected to the housing (22), and a rotor (24) as the controlled object is installed inside the housing (22).
4. The fully automatic control device for the start-up and shutdown process of a steam turbine according to claim 3, characterized in that, The auxiliary component (2) also includes a support plate (21) and a pipe (23). The support plate (21) is fixedly connected to the base (1). The housing (22) is stably connected to the base (1) and supported on the support plate (21). The pipe (23) is fixedly connected to one side of the housing (22).
5. The fully automatic control device for the start-up and shutdown process of a steam turbine according to claim 3, characterized in that, The auxiliary component (2) also includes an exhaust pipe (28) and a rotating rod (25). The exhaust pipe (28) is fixedly connected to the top of the housing (22), and the rotating rod (25) is fixedly connected to one side of the rotor (24).
6. The fully automatic control device for the start-up and shutdown process of a steam turbine according to claim 1, characterized in that, The integrated box (26) is fixedly connected to one side of the base (1), and the box door (27) on the integrated box (26) is movably connected.
7. The fully automatic control device for the start-up and shutdown process of a steam turbine according to claim 6, characterized in that, It also includes an integrated mechanism (3), which includes a base plate (31) and a cross plate (32). The base plate (31) is fixedly connected to the inside of the door (27), and the cross plate (32) is fixedly connected to the top of the base plate (31).
8. The fully automatic control device for the start-up and shutdown process of a steam turbine according to claim 7, characterized in that, The integrated mechanism (3) also includes a guide rail (33), a slider (34), and a clamping plate (35). The guide rail (33) is fixedly connected to the top of the cross plate (32). The slider (34) is slidably connected to the top of the guide rail (33). The clamping plate (35) is fixedly connected to the top of the slider (34). The clamping plate (35) is used to clamp the control module (39).
9. The fully automatic control device for the start-up and shutdown process of a steam turbine according to claim 8, characterized in that, The integrated mechanism (3) further includes a rotating column (36), a connecting rod (37) and a turntable (38). The rotating column (36) is fixedly connected to the top of the slider (34) and the top of the turntable (38) respectively. The turntable (38) is rotatably connected to the slider (34) through the connecting rod (37). The rotation of the turntable (38) drives the clamping plate (35) to move radially.