Automatic drainage device for preventing water from entering steam turbine
Through the pneumatic shut-off valve automatic drainage device controlled by the thermometer temperature difference, the problem of hysteresis and insufficient drainage of the steam turbine drainage device is solved, and a more efficient and stable drainage effect is achieved, reducing the risk of water inlet and steam loss.
Patent Information
- Application Number
- CN202422974033.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The existing steam turbine hydrophobic devices are mostly manual operation, with a hysteresis response and insufficient hydrophobicity, which causes the steam and water mixture to enter the shaft seal, increasing the risk of water inlet accidents.
The pneumatic shut-off valve is controlled by the thermometer one and two temperature difference signals to realize automatic drainage, replace the traditional liquid level meter, improve the response rate and stability of the drainage device, and optimize the drainage path through vertical and bent pipe structures.
It improves the timeliness and stability of the main steam pipeline of the turbine, reduces the possibility of water inlet, reduces the amount of steam dissipation, and improves thermal efficiency.
Smart Images
Figure CN223293785U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to steam turbines, in particular to an automatic drain device for preventing water from entering a steam turbine. Background Art
[0002] Thermal energy and power engineering primarily involves mechanics and thermodynamics. The primary operating principle is to convert thermal energy into mechanical energy under certain conditions, thereby providing the necessary kinetic energy for equipment to function properly and achieve the goal of providing power while protecting the environment. The most typical example of this application is thermal power in power plant turbines, which significantly improves system efficiency and reduces overall energy consumption.
[0003] Research has found that most of the existing automatic drain devices for the main steam pipe to prevent water from entering the turbine have the following problems:
[0004] 1. Existing drainage systems mostly use manual drainage devices, which place high demands on operators and have a delayed response.
[0005] 2. Insufficient drainage of the main steam pipe causes the steam-water mixture to be sent into the shaft seal, which is a turbine water ingress accident. Utility Model Content
[0006] Based on this, the purpose of the present invention is to provide an automatic drain device for preventing water from entering a steam turbine, so as to solve the technical problems raised in the above background.
[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an automatic drain device for preventing water from entering a turbine, comprising a main steam pipe, a vertical pipe and a curved pipe, the vertical pipe being connected to the main steam pipe via a tee pipe 1, the curved pipe being connected to the vertical pipe via a tee pipe 2, a manual stop valve 1 being provided on the vertical pipe, a manual stop valve 2 and a pneumatic stop valve being provided on the curved pipe, a thermometer 1 being provided on the main steam pipe, and thermometer 2 being installed on each of the vertical pipes, the thermometer 1 and the thermometer 2 being both connected to a controller, and the controller being connected to the pneumatic stop valve.
[0008] Furthermore, the vertical pipeline includes a DN200 vertical pipe section, a DN100 vertical pipe section and a DN50 vertical pipe section. The DN200 vertical pipe section is connected to the DN100 vertical pipe section through a reducer and a reducer. The DN100 vertical pipe section is connected to the DN50 vertical pipe section through a reducer and a reducer. The manual stop valve is installed on the DN50 vertical pipe section.
[0009] Furthermore, the curved pipe includes a DN50 horizontal pipe and a DN50 vertical pipe, and the DN50 horizontal pipe is connected to the DN50 vertical pipe through an elbow.
[0010] The utility model automatically operates through the temperature difference signal between thermometer 1 and thermometer 2, and opens and closes through compressed air braking, which can optimize the response rate of the automatic drain device, replace the traditional liquid level gauge, make the drain device simpler and more stable, improve the timeliness and stability of the draining of the main steam pipeline of the turbine, greatly reduce the possibility of water ingress to the turbine, and reduce the amount of steam escape caused by the untimely closure of the drain device during non-draining period, thereby improving the thermal efficiency of the turbine. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION
[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0013] The following describes an embodiment of the present invention based on its overall structure.
[0014] like Figure 1 As shown, the utility model includes a main steam pipe 1, a vertical pipe 2 and a curved pipe 3. The vertical pipe 2 is connected to the main steam pipe 1 through a tee pipe 4. The tee pipe 4 is a DN200 tee pipe. The vertical pipe 2 is set vertically downward to collect impurities generated during the operation of the main steam pipe and discharge them during maintenance. The curved pipe 3 is connected to the vertical pipe 2 through a tee pipe 5. The tee pipe 5 is a DN200 to DN50 tee pipe. The vertical pipe 2 includes a DN200 vertical Pipe section 21, DN100 vertical pipe section 22 and DN50 vertical pipe section 23, the DN200 vertical pipe section 21 is connected to the DN100 vertical pipe section 22 through a reducer 8, the reducer 8 is a DN200 to DN100 reducer, the DN100 vertical pipe section 22 is connected to the DN50 vertical pipe section 23 through a reducer 9, the reducer 9 is a DN100 to DN50 reducer, and a manual stop valve 10 is installed on the DN50 vertical pipe section 23. The curved pipe 3 includes a DN50 horizontal pipe 31 and a DN50 vertical pipe 32. The DN50 horizontal pipe 31 is connected to the DN50 vertical pipe 32 through an elbow 14. The elbow 14 is a DN50-90° elbow. A manual stop valve 2 12 and a pneumatic stop valve 13 are installed on the DN50 vertical pipe 32 from top to bottom. A thermometer 1 6 is provided on the main steam pipe 1. A thermometer 2 7 is installed between the tee pipe 1 4 and the tee pipe 2 5 on the vertical pipe 2. The thermometer 1 6 and the thermometer 2 7 are both connected to a controller (not shown in the figure), and the controller is connected to the pneumatic stop valve 13.
[0015] When the automatic drain device of the utility model is working normally, the manual stop valve 10 is in a normally closed state and the manual stop valve 2 12 is in a normally open state. When there is a difference in the temperature measured by the thermometer 1 6 and the thermometer 2 7, a signal is sent to the controller, and the pneumatic stop valve 13 is opened by the controller to drain. When the temperatures measured by the thermometer 1 6 and the thermometer 2 7 are the same, the pneumatic stop valve 13 is closed to stop draining, thereby replacing the traditional liquid level gauge, making the drain device simpler and more stable, improving the timeliness and stability of the draining of the main steam pipeline of the turbine, greatly reducing the possibility of water ingress to the turbine, and reducing the amount of steam escape caused by the untimely closure of the drain device during the non-draining period, thereby improving the thermal efficiency of the turbine.
[0016] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.
Claims
1. An automatic drain device for preventing water from entering a steam turbine, characterized in that: It includes a main steam pipe, a vertical pipe and a curved pipe. The vertical pipe is connected to the main steam pipe through a tee pipe 1, and the curved pipe is connected to the vertical pipe through a tee pipe 2. The vertical pipe is provided with a manual stop valve 1, and the curved pipe is provided with a manual stop valve 2 and a pneumatic stop valve. The main steam pipe is provided with a thermometer 1, and the vertical pipes are both installed with a thermometer 2. The thermometer 1 and the thermometer 2 are both connected to a controller, and the controller is connected to the pneumatic stop valve.
2. The automatic drain device for preventing water ingress into a steam turbine according to claim 1, characterized in that: The vertical pipeline includes a DN200 vertical pipe section, a DN100 vertical pipe section and a DN50 vertical pipe section. The DN200 vertical pipe section is connected to the DN100 vertical pipe section through a reducer and a reducer. The DN100 vertical pipe section is connected to the DN50 vertical pipe section through a reducer and a reducer. The manual stop valve is installed on the DN50 vertical pipe section.
3. The automatic drain device for preventing water ingress into a steam turbine according to claim 1, characterized in that: The curved pipeline includes a DN50 horizontal and vertical pipe and a DN50 vertical pipe, and the DN50 horizontal and vertical pipe is connected to the DN50 vertical pipe through an elbow.