Adjustable cooling water pipeline for steam turbine of thermal power plant

Abstract

The utility model provides a kind of adjustable thermal power plant steam turbine cooling water pipeline, it is related to steam turbine cooling technical field, including base, the top of base is provided with arc groove, fixed cylinder is embedded and installed in the inside of arc groove, ring cavity is provided with in the inner wall inside of fixed cylinder, the top and bottom of fixed cylinder are fixedly connected with connecting pipe with equal interval, the connecting pipe is all communicated with ring cavity, the top of connecting pipe is fixed and communicated with inlet pipe in upper portion, the bottom of connecting pipe is fixed and communicated with outlet pipe in lower portion, square groove is provided with in the inner arc wall of arc groove and close to bottom portion.The utility model in, by controlling first magnetic valve, the amount of cooling medium that can be flexibly adjusted into ring cavity inside, and then can be according to the actual operation condition of steam turbine, accurately adjust cooling effect, make cooling and steam turbine heat generation match.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine cooling technology, and in particular to an adjustable cooling water pipeline for steam turbines in thermal power plants. Background Technology

[0002] In the operation of steam turbines in thermal power plants, the cooling system plays a crucial role. Proper cooling ensures the turbine operates efficiently and stably, preventing equipment damage and efficiency reduction due to overheating. Therefore, optimizing the design of the turbine cooling water piping to enable adjustable cooling has become an important direction for equipment improvement in thermal power plants.

[0003] Traditional thermal power plant turbine cooling water pipelines mostly employ fixed structures and flow designs, resulting in relatively constant flow and distribution of the cooling medium. This makes it difficult to flexibly adjust these pipelines according to the actual operating conditions of the turbine (such as different loads and ambient temperatures). When the turbine operates under different loads, the heat it generates varies. Fixed cooling pipelines cannot precisely match these heat changes, potentially leading to insufficient or excessive cooling. Overcooling wastes energy, while insufficient cooling affects the normal operation of the turbine and may even shorten its lifespan. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the existing technology, most of the cooling water pipelines for steam turbines in thermal power plants adopt a fixed structure and flow design, and the flow rate and distribution of the cooling medium are relatively fixed, making it difficult to flexibly adjust according to the actual operating conditions of the steam turbine. Therefore, this invention proposes an adjustable cooling water pipeline for steam turbines in thermal power plants.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable cooling water pipeline for a steam turbine in a thermal power plant, comprising a base, an arc groove on the top of the base, a fixed cylinder embedded and installed inside the arc groove, annular cavities equally spaced inside the inner wall of the fixed cylinder, connecting pipes equally spaced at the top and bottom of the fixed cylinder, the connecting pipes communicating with the annular cavities, an inlet pipe fixed and connected to the top of the upper connecting pipe, an outlet pipe fixed and connected to the bottom of the lower connecting pipe, and a square groove on the inner arc wall of the arc groove near the bottom.

[0006] Preferably, a support plate is fixedly connected to the bottom of the base and near the four corners, and an anti-slip pad is fixedly connected to the bottom of the support plate.

[0007] Preferably, the connecting pipe and the outlet pipe described below are located inside the square tank.

[0008] Preferably, a first solenoid valve is fixed and installed on the surface of part of the connecting pipe.

[0009] Preferably, a second solenoid valve is installed on the surface of both the inlet pipe and the outlet pipe, and near one end.

[0010] Preferably, a groove is provided at the top of the base and near the center of one side, and an air inlet pipe is embedded inside the groove. One end of the air inlet pipe is fixed and connected to the fixed cylinder.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, by controlling the first solenoid valve, the amount of cooling medium entering the annular cavity can be flexibly adjusted, thereby precisely adjusting the cooling effect according to the actual operating conditions of the steam turbine, so that the cooling is matched with the heat generated by the steam turbine.

[0012] 2. In this utility model, the situation of over-cooling or under-cooling is avoided. Under the premise of ensuring the normal operation of the steam turbine, unnecessary consumption of cooling medium is reduced, thereby achieving energy saving and consumption reduction.

[0013] 3. In this utility model, the appropriate cooling effect allows the steam turbine to always operate in a more suitable temperature environment, reducing equipment failures caused by temperature problems and improving the reliability and service life of the steam turbine. Attached Figure Description

[0014] Figure 1 This utility model provides a three-dimensional view of the overall structure of an adjustable cooling water pipeline for a steam turbine in a thermal power plant. Figure 2 A three-dimensional view of a fixed cylinder structure for an adjustable cooling water pipeline of a steam turbine in a thermal power plant is provided for this utility model. Figure 3 This utility model provides a partial structural plan view of an adjustable cooling water pipeline for a steam turbine in a thermal power plant. Figure 4 This utility model presents a three-dimensional view of the base structure for an adjustable cooling water pipeline of a steam turbine in a thermal power plant.

[0015] Legend: 1. Base; 2. Support plate; 3. Anti-slip pad; 4. Arc groove; 5. Fixing cylinder; 6. Square groove; 7. Annular cavity; 8. Connecting pipe; 9. Liquid inlet pipe; 10. Liquid outlet pipe; 11. First solenoid valve; 12. Second solenoid valve; 13. Embedded groove; 14. Air inlet pipe. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1, such as Figure 1-4 As shown, this utility model provides an adjustable cooling water pipeline for a steam turbine in a thermal power plant, including a base 1. An arc groove 4 is provided on the top of the base 1. A fixed cylinder 5 is embedded and installed inside the arc groove 4. An annular cavity 7 is provided at equal intervals on the inner wall of the fixed cylinder 5. Connecting pipes 8 are fixedly connected at equal intervals to the top and bottom of the fixed cylinder 5. The connecting pipes 8 are all connected to the annular cavity 7. The top of the upper connecting pipe 8 is fixed and connected to an inlet pipe 9, and the bottom of the lower connecting pipe 8 is fixed and connected to an outlet pipe 10. A square groove 6 is provided on the inner arc wall of the arc groove 4 near the bottom.

[0019] The overall effect of embodiment 1 is as follows: the top of the base 1 has an arc groove 4, and a fixed cylinder 5 is embedded and installed inside the arc groove 4, which can support the bottom of the fixed cylinder 5. The inner wall of the fixed cylinder 5 has annular cavities 7 at equal intervals. The top and bottom of the fixed cylinder 5 are fixedly connected to connecting pipes 8 at equal intervals. The connecting pipes 8 are all connected to the annular cavities 7. The top of the upper connecting pipe 8 is fixed and connected to the liquid inlet pipe 9, and the bottom of the lower connecting pipe 8 is fixed and connected to the liquid outlet pipe 10. The inner arc wall of the arc groove 4 and near the bottom has a square groove 6, which can allow the liquid inlet pipe 9 to enter the medium and pass through the connecting pipe 8 and the annular cavity 7 to cool the fan blades inside the fixed cylinder 5, while the medium will be discharged through the liquid outlet pipe 10.

[0020] Example 2, as Figure 1-4 As shown, support plates 2 are fixedly connected to the bottom of the base 1 and near the four corners, and anti-slip pads 3 are fixedly connected to the bottom of the support plates 2; the lower connecting pipe 8 and the liquid outlet pipe 10 are located inside the square groove 6; a first solenoid valve 11 is fixedly installed on the surface of part of the connecting pipe 8; a second solenoid valve 12 is installed on the surface of the liquid inlet pipe 9 and the liquid outlet pipe 10 near one end; a groove 13 is opened on the top of the base 1 near the center of one side, and an air inlet pipe 14 is embedded inside the groove 13, and one end of the air inlet pipe 14 is fixed and connected to the fixed cylinder 5.

[0021] The overall effect of embodiment 2 is as follows: support plates 2 are fixedly connected to the bottom of the base 1 and near the four corners, and anti-slip pads 3 are fixedly connected to the bottom of the support plates 2, which can support the bottom of the base 1; the lower connecting pipe 8 and the liquid outlet pipe 10 are located inside the square groove 6, which can protect the connecting pipe 8 and the liquid outlet pipe 10; a first solenoid valve 11 is fixed and installed on the surface of part of the connecting pipe 8, which can control the medium connection; a second solenoid valve 12 is installed on the surface of the liquid inlet pipe 9 and the liquid outlet pipe 10 near one end, which can allow the second solenoid valve 12 to allow liquid to enter and exit the liquid inlet pipe 9 and the liquid outlet pipe 10; a groove 13 is opened on the top of the base 1 near the center of one side, and an air inlet pipe 14 is embedded in the groove 13. One end of the air inlet pipe 14 is fixed and connected to the fixed cylinder 5, which can allow air to enter the fixed cylinder 5.

[0022] Working principle: The cooling medium enters through the inlet pipe 9 and is transported to the annular cavity 7 on the inner wall of the fixed cylinder 5 via the upper connecting pipe 8. When the cooling effect needs to be adjusted, the first solenoid valve 11 on the control connecting pipe 8 is opened and closed to control the amount of cooling medium entering the corresponding annular cavity 7. The cooling medium exchanges heat with the fixed cylinder 5 in the annular cavity 7 to cool the turbine-related components inside the fixed cylinder 5. The heated cooling medium flows from the lower connecting pipe 8 to the outlet pipe 10 for discharge. At the same time, the air inlet pipe 14 can introduce gas to assist in cooling or achieve other functions. The cooling effect is adjusted by controlling the flow rate of the cooling medium through the first solenoid valve 11. The second solenoid valve 12 on the inlet pipe 9 and the outlet pipe 10 can control the opening and closing of the liquid inlet and outlet as a whole.

[0023] The wiring diagrams of the first solenoid valve 11 and the second solenoid valve 12 in this utility model are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to the actual use. Therefore, the control method and wiring arrangement of the first solenoid valve 11 and the second solenoid valve 12 will not be explained in detail.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An adjustable cooling water pipeline for a steam turbine in a thermal power plant, comprising a base (1), characterized in that: The top of the base (1) is provided with an arc groove (4), and a fixed cylinder (5) is embedded and installed inside the arc groove (4). The inner wall of the fixed cylinder (5) is provided with annular cavities (7) at equal intervals. The top and bottom of the fixed cylinder (5) are fixedly connected with connecting pipes (8) at equal intervals. The connecting pipes (8) are all connected to the annular cavities (7). The top of the upper connecting pipe (8) is fixed and connected with an inlet pipe (9), and the bottom of the lower connecting pipe (8) is fixed and connected with an outlet pipe (10). The inner arc wall of the arc groove (4) and near the bottom is provided with a square groove (6).

2. An adjustable cooling water pipeline for a steam turbine in a thermal power plant according to claim 1, characterized in that: Support plates (2) are fixedly connected to the bottom of the base (1) and near the four corners, and anti-slip pads (3) are fixedly connected to the bottom of the support plates (2).

3. An adjustable cooling water pipeline for a steam turbine in a thermal power plant according to claim 1, characterized in that: The connecting pipe (8) and the outlet pipe (10) described below are located inside the square groove (6).

4. An adjustable cooling water pipeline for a thermal power plant turbine according to claim 1, characterized in that: A first solenoid valve (11) is fixed and installed on the surface of part of the connecting pipe (8).

5. An adjustable cooling water pipeline for a thermal power plant turbine according to claim 1, characterized in that: A second solenoid valve (12) is installed on the surface of the inlet pipe (9) and the outlet pipe (10) near one end.

6. An adjustable cooling water pipeline for a steam turbine in a thermal power plant according to claim 1, characterized in that: A groove (13) is provided on the top of the base (1) and near the center of one side. An air inlet pipe (14) is embedded inside the groove (13). One end of the air inlet pipe (14) is fixed and connected to the fixed cylinder (5).

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