Steam exhaust structure capable of pressurizing and guiding flow for steam turbine
By introducing components such as a guide ring cavity tube and a booster pump into the turbine exhaust structure, the problem of low exhaust pressure was solved, the steam flow rate and exhaust efficiency were improved, equipment vibration was reduced, and service life was extended.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-03-24
AI Technical Summary
The existing steam turbine exhaust structure has low exhaust pressure and is not conducive to pressure regulation, resulting in slow exhaust speed, which affects working efficiency and equipment life.
A steam exhaust structure was designed, which includes components such as an exhaust pipe, a flow guide ring cavity pipe, a pipe head, and a booster pump. By changing the pipe diameter and setting up a booster pump, the steam flow is accelerated, and the exhaust pressure and efficiency are improved.
By accelerating steam flow and pressurizing, the exhaust speed and pressure of the steam turbine are increased, exhaust efficiency is enhanced, equipment vibration is reduced, and service life is extended.
Smart Images
Figure CN224032660U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steam turbine technology, specifically a steam turbine exhaust structure with pressurization and flow guidance. Background Technology
[0002] A steam turbine is a rotary power machine that uses steam as its power source and converts the thermal energy of steam into mechanical work. It is the most widely used prime mover in modern thermal power plants and can also directly drive various pumps, fans, compressors, and ship propellers. It can also use the exhaust steam or intermediate extraction steam from the steam turbine to meet the heating needs of production and daily life. Since steam turbines usually operate at high speeds, they generate significant vibrations during operation. These vibrations are prolonged and frequent, which not only shortens the service life of the unit's components but also easily causes parts to loosen or fall off, seriously affecting work efficiency and even causing accidents.
[0003] The existing steam turbine structure includes components such as impellers and rotors. In addition, the steam turbine is equipped with a steam inlet structure, a steam extraction structure, and a steam exhaust structure. The steam exhaust structure of the steam turbine is connected to the condenser. Currently, the pipe diameters at both ends of the exhaust structure are the same. Water vapor enters the condenser from the exhaust structure through the pipes. Because the pipe diameter is the same, the water vapor flows slowly during the exhaust process. As a result, the water vapor discharge pressure inside the exhaust structure is low, the discharge speed is poor, and it is not conducive to the regulation of the discharge pressure during the exhaust process, making it inconvenient for pressurization regulation.
[0004] Therefore, those skilled in the art have provided a pressurized and divertable exhaust structure for steam turbines to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this invention is to provide a pressurized and flow-guiding exhaust structure for steam turbines, in order to solve the problem mentioned in the background art that the exhaust pressure of existing steam turbine exhaust structures is relatively low and not conducive to pressurizing the exhaust pressure.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A pressurized and flow-guided exhaust structure for a steam turbine includes: a steam pipe, a connecting pipe fixedly connected to the upper end of the exhaust pipe, a transition pipe connected to one end of the connecting pipe, a condenser connecting pipe connected to the end of the transition pipe away from the connecting pipe, an outlet provided at the right end of the condenser connecting pipe, a neck fixedly connected inside the upper end of the exhaust pipe, a flow-guided annular cavity pipe connected to the upper end of the neck, a pipe head connected to the upper end of the flow-guided annular cavity pipe, a connector pipe connected to the outer side of the flow-guided annular cavity pipe, a booster pump installed at the end of the connector pipe away from the flow-guided annular cavity pipe, and a connecting pipe provided between the flow-guided annular cavity pipe and the neck.
[0008] As a further embodiment of this utility model: the outer surface of the flow guide ring cavity tube forms a volute ring, and the flow guide ring cavity tube is interconnected with the neck through a connecting pipe.
[0009] As a further improvement of this utility model: the flow guide ring cavity tube and the tube head are interconnected, and the diameter of the tube head is larger than the diameter of the flow guide ring cavity tube.
[0010] As a further improvement of this utility model: a flange is provided at the open end of the pipe head, and the pipe head is interconnected with the condenser connecting pipe through a transition pipe.
[0011] As a further improvement of this utility model: a fan is installed at the left end of the condenser connecting pipe, and the transition pipe is symmetrical about the center line of the condenser connecting pipe.
[0012] As a further improvement of this utility model, the outer wall of the connecting pipe is fixedly connected with a support leg.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. The top of the exhaust pipe is fixedly connected to a neck, which is connected to the guide ring cavity pipe through a connecting pipe. One end of the guide ring cavity pipe is integrally connected to the pipe head. The diameter of the guide ring cavity pipe gradually increases, and the diameter of the pipe head connected to the guide ring cavity pipe is larger than that of the guide ring cavity pipe. In this way, the diameter of the guide ring cavity pipe and the pipe head gradually increases from bottom to top. The small diameter at the bottom is used to accelerate the flow speed of water vapor and increase the exhaust pressure of the guide ring cavity pipe. As the diameter gradually increases, the water vapor discharge capacity increases, thus improving the exhaust efficiency.
[0015] 2. A neck is fixedly installed inside the upper end of the exhaust pipe. The lower diameter of the neck is larger than the upper diameter. When steam enters the exhaust pipe, the change in the neck diameter accelerates the steam discharge speed. As the neck diameter decreases, the pressure energy of the steam flow decreases while the kinetic energy increases. This increases the steam discharge velocity and improves the steam discharge pressure. At the same time, a booster pump is connected to the outside of the guide ring cavity to increase the pressure inside the guide ring cavity and improve the steam discharge pressure. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of a steam turbine exhaust structure with pressurized and diverted flow.
[0017] Figure 2 This is a schematic diagram of the exhaust pipe of a steam turbine with pressurized and diverted exhaust structure.
[0018] Figure 3 This is a second-view structural schematic diagram of a steam turbine exhaust structure with pressurized and guided flow.
[0019] Figure 4 This is a schematic diagram of the structure between the exhaust pipe and the neck of a steam turbine exhaust structure that can be pressurized and guided.
[0020] Figure 5 This is a schematic diagram of the connection structure between the guide ring cavity tube and the tube head in a steam turbine exhaust structure with pressurized and guideable flow.
[0021] In the diagram: 1. Exhaust pipe; 2. Connecting pipe; 3. Support leg; 4. Booster pump; 5. Transition pipe; 6. Condenser connecting pipe; 7. Fan; 8. Neck; 9. Guide ring cavity pipe; 10. Pipe head; 11. Connecting pipe; 12. Outlet; 13. Butt pipe. Detailed Implementation
[0022] 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.
[0023] Please see Figures 1-5This utility model provides a steam turbine exhaust structure with pressurization and flow guidance, including: an exhaust pipe 1, a connecting pipe 2 fixedly connected to the upper end of the exhaust pipe 1, a support 3 fixedly connected to the outer wall of the connecting pipe 2, a transition pipe 5 connected to one end of the connecting pipe 2, a condenser connecting pipe 6 connected to the end of the transition pipe 5 away from the connecting pipe 2, an outlet 12 provided at the right end of the condenser connecting pipe 6, a neck 8 fixedly connected inside the upper end of the exhaust pipe 1, a flow guiding ring tube 9 connected to the upper end of the neck 8, a pipe head 10 connected to the upper end of the flow guiding ring tube 9, a flange provided at the open end of the pipe head 10, and the pipe head 10 is interconnected with the condenser connecting pipe 6 through the transition pipe 5, a fan 7 installed at the left end of the condenser connecting pipe 6, and the transition pipe 5 is symmetrical about the center line of the condenser connecting pipe 6.
[0024] Specifically, steam is discharged from the exhaust pipe 1 into the interior of the guide ring cavity 9, and then guided out of the exhaust pipe 1 through the guide ring cavity 9 and the pipe head 10. The steam is then discharged into the condenser connecting pipe 6 through the transition pipe 5. Since the transition pipe 5 is set on both sides of the condenser connecting pipe 6, and a fan 7 is set at the left end of the condenser connecting pipe 6, the fan 7 is used to accelerate the steam flow rate inside the condenser connecting pipe 6, while avoiding the airflow from the two sides of the transition pipe 5 to be opposite, so as to facilitate the steam to be pushed open and discharged into the condenser from the opening of the condenser connecting pipe 6. The condenser connecting pipe 6 has a large diameter, which increases the steam flow rate and improves the steam exhaust speed and efficiency.
[0025] A connector pipe 11 is connected to the outside of the flow guide ring tube 9. A booster pump 4 is installed at the end of the connector pipe 11 away from the flow guide ring tube 9. A connecting pipe 13 is provided between the flow guide ring tube 9 and the neck 8. A volute annulus is formed on the outside of the flow guide ring tube 9. The flow guide ring tube 9 is connected to the neck 8 through the connecting pipe 13. The flow guide ring tube 9 is connected to the tube head 10. The diameter of the tube head 10 is larger than the diameter of the flow guide ring tube 9.
[0026] Specifically, the steam is guided by the annular structure of the volute. The diameter of the guide ring tube 9 gradually increases from bottom to top, and the diameter of the guide ring tube 9 is smaller than the diameter of the tube head 10. The diameter of the tube head 10 gradually increases from the connection point of the guide ring tube 9 to the open end. As the diameter of the pipe gradually increases, the small diameter at the lower end is used to accelerate the flow speed of water vapor and increase the exhaust pressure of the guide ring tube 9. As the diameter gradually increases, the exhaust capacity of water vapor increases. The interconnection between the connecting pipe 13 and the neck 8 allows the steam in the exhaust pipe 1 to be smoothly discharged into the guide ring tube 9, and then discharged into the condenser connecting pipe 6 through the guide ring tube 9 and the tube head 10.
[0027] The working principle of this utility model is as follows:
[0028] In using this utility model, the exhaust pipe 1 is installed on the exhaust structure of the steam turbine using the support leg 3. The exhaust pipe 1 is connected to the exhaust port using the sealing flange structure. The steam discharged from the steam turbine enters the exhaust pipe 1. The steam rises through the neck 8 and the connecting pipe 13 that connects to the neck 8 into the guide ring cavity pipe 9. The steam rises along the guide ring cavity pipe 9 into the pipe head 10. The diameter of the guide ring cavity pipe 9 is smaller than the diameter of the pipe head 10. The diameter of the pipe head 10 gradually increases from the connection point of the guide ring cavity pipe 9 to the open end. As the diameter of the pipe gradually increases, the lower end... The small diameter accelerates the flow rate of water vapor, increasing the exhaust pressure of the guide ring tube 9. At the same time, the guide ring tube 9 is connected to the booster pump 4 through the connector pipe 11. The booster pump 4 is used to increase the pressure inside the guide ring tube 9 and increase the steam flow rate. Then, the steam is led out through the guide ring tube 9 and the pipe head 10, and the steam is discharged into the condenser connecting pipe 6 through the transition pipe 5. When the steam enters the condenser connecting pipe 6, the blower 7 is used to accelerate the steam flow rate inside the condenser connecting pipe 6, and then the steam is discharged into the condenser from the opening of the condenser connecting pipe 6.
[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A pressurized and flow-guiding exhaust structure for a steam turbine, characterized in that, include: The exhaust pipe (1) is fixedly connected to a connecting pipe (2) at its upper end. One end of the connecting pipe (2) is connected to a transition pipe (5). The end of the transition pipe (5) away from the connecting pipe (2) is connected to a condenser connecting pipe (6). An outlet (12) is provided at the right end of the condenser connecting pipe (6). A neck (8) is fixedly connected inside the upper end of the exhaust pipe (1). A flow guide ring cavity pipe (9) is connected to the upper end of the neck (8). A pipe head (10) is connected to the upper end of the flow guide ring cavity pipe (9). A connector pipe (11) is connected to the outside of the flow guide ring cavity pipe (9). A booster pump (4) is installed at the end of the connector pipe (11) away from the flow guide ring cavity pipe (9). A connecting pipe (13) is provided between the flow guide ring cavity pipe (9) and the neck (8).
2. The steam turbine exhaust structure with pressurized flow guidance according to claim 1, characterized in that, The outer surface of the flow guide ring tube (9) forms a volute ring, and the flow guide ring tube (9) is interconnected with the neck (8) through the connecting pipe (13).
3. The exhaust structure for a steam turbine with pressurized flow guidance according to claim 1, characterized in that, The flow guide ring cavity tube (9) and the tube head (10) are connected to each other, and the diameter of the tube head (10) is larger than the diameter of the flow guide ring cavity tube (9).
4. The steam turbine exhaust structure with pressurized flow guidance according to claim 1, characterized in that, The pipe head (10) is provided with a flange at its open end, and the pipe head (10) is connected to the condenser connecting pipe (6) through the transition pipe (5).
5. The steam turbine exhaust structure with pressurized flow guidance according to claim 1, characterized in that, A fan (7) is installed at the left end of the condenser connecting pipe (6), and the transition pipe (5) is symmetrical about the center line of the condenser connecting pipe (6).
6. The exhaust structure for a steam turbine with pressurized flow guidance according to claim 1, characterized in that, The outer wall of the connecting pipe (2) is fixedly connected with a support leg (3).