Axial steam turbine exhaust device capable of self-balancing vacuum suction
The axial steam turbine exhaust device balances vacuum suction using a large tie rod compensator and supporting components to address the challenge of horizontal vacuum force on the supporting foundation, reducing design costs and ensuring stable operation.
Patent Information
- Application Number
- CN202421260043.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-06-04
AI Technical Summary
The vacuum force generated by the compensating section of the exhaust pipe of steam turbines in large-capacity solar thermal projects acts on the supporting foundation in the form of a horizontal force, making it difficult to select an appropriate foundation for the exhaust pipe.
The axial steam turbine exhaust device incorporates a large tie rod compensator connected to the steam turbine's low-pressure cylinder, with a connecting section and fixed support, and includes components like sliding supports and spring brackets to balance the vacuum force, allowing thermal displacement transfer to an air-cooling island pipeline.
The device self-balances vacuum suction, reducing the design cost of the exhaust pipe's support foundation and ensuring safe, stable operation of the low-pressure cylinder by absorbing vacuum forces and transferring thermal displacement.
Smart Images
Figure CN222254094U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an axial steam turbine exhaust device capable of self-balancing vacuum suction, belonging to the field of auxiliary equipment of steam turbines in photothermal projects. Background Art
[0002] In recent years, with the government's strong support for the development of new energy, the number of newly built CSP units has increased, and the capacity of CSP units has also increased. At present, 100MW CSP units have become the mainstream products in the industry.
[0003] In order to ensure the safe operation of axial exhaust steam turbines in 100MW-class solar thermal projects, it is necessary to optimize the support foundation of the exhaust pipe, optimize the design and selection of the support foundation of the exhaust pipe, reduce the design cost of the exhaust pipe support foundation, and improve market competitiveness.
[0004] Since the exhaust pipe of the shaft exhaust steam turbine in large-capacity solar thermal projects has a large diameter, the vacuum force generated by the compensating section on the exhaust pipe is relatively large. This vacuum force acts on the supporting foundation of the exhaust pipe in the form of a horizontal force, making it difficult to select the supporting foundation of the exhaust pipe.
[0005] In summary, the vacuum force generated by the compensating section of the exhaust pipe of the existing steam turbine acts on the supporting foundation in the form of horizontal force, which leads to the technical problem of difficulty in selecting the supporting foundation of the exhaust pipe. Summary of the invention
[0006] The utility model provides an axial steam turbine exhaust device capable of self-balancing vacuum suction in order to solve the technical problem that the vacuum force generated by the compensation section of the exhaust pipe of the existing steam turbine acts on the supporting foundation in the form of horizontal force, which leads to difficulty in selecting the supporting foundation of the exhaust pipe.
[0007] The technical solution of the utility model is that the connecting section is arranged at the right end of the large tie rod compensator, the large tie rod compensator is connected to the external low-pressure cylinder of the steam turbine through the connecting section, the left end of the large tie rod compensator is connected to the air cooling island through an external pipeline, the fixed support is installed on the bottom surface of the large tie rod compensator, the bottom surface of the large tie rod compensator is provided with an opening, the top surface of the exhaust device hot well is connected to the opening of the bottom surface of the large tie rod compensator, and the exhaust device hot well is arranged on the right side of the fixed support.
[0008] As another improvement of the utility model, the large tie rod compensator is connected to the external low-pressure cylinder of the steam turbine through a connecting section, and the right end of the connecting section is connected to the external low-pressure cylinder of the steam turbine by a rigid connection.
[0009] As another improvement of the utility model, the right end of the connecting section is connected to the external low-pressure cylinder of the steam turbine by a flange.
[0010] As another improvement of the utility model, it also includes a sliding support and a spring bracket, which are installed on the bottom surface of the large pull rod compensator from left to right in sequence, and the sliding support is arranged on the right side of the hot well of the exhaust device.
[0011] As another improvement of the utility model, the fixed support is installed on the left bottom surface of the large tie rod compensator, the sliding support is installed on the right bottom surface of the large tie rod compensator, and the spring bracket is installed on the right end bottom surface of the large tie rod compensator.
[0012] As another improvement of the utility model, the hot well of the exhaust device adopts a cylindrical integral structure.
[0013] As another improvement of the utility model, compensation joints are provided on the top surface of the hot well of the exhaust device and the bottom surface of the large pull rod compensator.
[0014] As another improvement of the utility model, a condensate deoxygenation device is detachably installed in the hot well of the exhaust device.
[0015] Beneficial effects of the utility model:
[0016] 1. The utility model adopts a large tie rod compensator as the main body, and an expansion joint is arranged on the large tie rod compensator to compensate for radial thermal displacement. Due to the existence of the large tie rod compensator in the axial direction of the exhaust device, the large tie rod compensator as a whole is equivalent to a rigid pipe, which absorbs the vacuum force generated by the expansion joint by self-balancing, so that the vacuum force cannot act on the fixed support foundation of the exhaust pipe, reducing the design cost of the fixed support foundation of the exhaust pipe. At the same time, the thermal displacement of the low-pressure cylinder of the steam turbine can be transferred to the air-cooling island pipeline behind the exhaust device, ensuring the safe and stable operation of the low-pressure cylinder.
[0017] 2. The fixed support of the utility model serves as a fixing point for the exhaust pipe part of the exhaust device. The sliding support supports the exhaust device and compensates for the thermal displacement of the large tie rod compensator itself. The function of the spring bracket is to reduce the vertical force of the exhaust device on the low-pressure cylinder port to ensure the safe and stable operation of the low-pressure cylinder.
[0018] 3. The hot well of the steam exhaust device of the utility model adopts a cylindrical integral structure and does not require assembly, which reduces the difficulty of power plant installation. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The utility model is a structural schematic diagram of an axial steam turbine exhaust device capable of self-balancing vacuum suction. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the examples of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. In the description of the utility model, it should be explained that the positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is only based on the positional relationship of the orientation shown in the drawings, which is only for the convenience of describing the utility model, and does not indicate or imply that the referred parts have a specific orientation, are constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0021] Specific implementation method 1: Combination Figure 1 The present embodiment is described. The present embodiment is an axial steam turbine exhaust device capable of self-balancing vacuum suction, comprising a connecting section 1, a large tie rod compensator 2, a fixed support 3 and an exhaust device hot well 6. The connecting section 1 is arranged at the right end of the large tie rod compensator 2. The large tie rod compensator 2 is connected to an external steam turbine low-pressure cylinder via the connecting section 1. The left end of the large tie rod compensator 2 is connected to an air-cooling island via an external pipeline. The fixed support 3 is installed on the bottom surface of the large tie rod compensator 2. An opening is arranged on the bottom surface of the large tie rod compensator 2. The top surface of the exhaust device hot well 6 is connected to the opening on the bottom surface of the large tie rod compensator 2. The exhaust device hot well 6 is arranged on the right side of the fixed support 3.
[0022] The fixed support serves as a fixed point for the exhaust pipe of the exhaust device. It adopts a straight-through large tie rod compensator as the main body, and an expansion joint is set on the large tie rod compensator to compensate for radial thermal displacement. Due to the existence of the large tie rod compensator in the axial direction of the exhaust device, the large tie rod compensator is equivalent to a rigid pipe as a whole, which absorbs the vacuum force generated by the expansion joint by self-balancing, so that the vacuum force cannot act on the fixed support foundation of the exhaust pipe, reducing the design cost of the fixed support foundation of the exhaust pipe. At the same time, the thermal displacement of the low-pressure cylinder of the steam turbine can be transferred to the air-cooling island pipeline behind the exhaust device, ensuring the safe and stable operation of the low-pressure cylinder.
[0023] Specific implementation method 2: Combination Figure 1 This embodiment is described. The difference between this embodiment and the first embodiment is that the large tie rod compensator 2 is connected to the external low-pressure cylinder of the steam turbine through the connecting section 1, and the right end of the connecting section 1 is connected to the external low-pressure cylinder of the steam turbine by a rigid connection. The function is to enhance the self-balancing effect of the large tie rod compensator. The other components and connection methods are the same as those of the first embodiment.
[0024] Specific implementation method three: Combination Figure 1This embodiment is described. The difference between this embodiment and the first embodiment is that the right end of the connecting section 1 is connected to the external low-pressure cylinder of the steam turbine by a flange. The function is to meet the need of opening the low-pressure cylinder of the steam turbine for maintenance. The other components and connection methods are the same as those of the first or second embodiment.
[0025] Specific implementation method four: Combination Figure 1 This embodiment is described. The difference between this embodiment and the first embodiment is that it also includes a sliding support 4 and a spring support 5. The sliding support 4 and the spring support 5 are sequentially installed on the bottom surface of the large tie rod compensator 2 from left to right. The sliding support 4 is arranged on the right side of the exhaust device hot well 6. The sliding support supports the exhaust device while compensating the thermal displacement of the large tie rod compensator itself. The other components and connection methods are the same as any one of the first to third embodiments.
[0026] Specific implementation method five: Combination Figure 1 This embodiment is described. The difference between this embodiment and the specific embodiment 1 is that the fixed support 3 is installed on the left bottom surface of the large tie rod compensator 2, the sliding support 4 is installed on the right bottom surface of the large tie rod compensator 2, and the spring bracket 5 is installed on the right end bottom surface of the large tie rod compensator 2. The function of the spring bracket is to reduce the vertical force of the exhaust device on the low-pressure cylinder port to ensure the safe and stable operation of the low-pressure cylinder. The other components and connection methods are the same as any one of the specific embodiments 1 to 4.
[0027] Specific implementation method six: Combination Figure 1 This embodiment is described. The difference between this embodiment and the first embodiment is that the hot well of the exhaust device adopts a cylindrical integral structure. The cylindrical integral structure is adopted, and no assembly is required. The difficulty of power plant installation is reduced. The other components and connection methods are the same as any one of the first to fifth embodiments.
[0028] Specific implementation method seven: Combination Figure 1 This embodiment is described. The difference between this embodiment and the specific embodiment 1 is that a compensation joint 7 is provided between the top surface of the exhaust device hot well 6 and the bottom surface of the large tie rod compensator 2. The function is to compensate for the thermal displacement between the exhaust device hot well and the large tie rod compensator. The other components and connection methods are the same as any one of the specific embodiments 1 to 6.
[0029] Specific implementation method eight: Combination Figure 1 This embodiment is described. The difference between this embodiment and the first embodiment is that a condensate deaerator is detachably installed in the hot well 6 of the exhaust device. The condensate deaerator is determined according to specific actual needs to determine whether it needs to be set up to suit different working conditions. The other components and connection methods are the same as any one of the first to seventh embodiments.
[0030] Combination Figure 1 Explain the working principle of the utility model:
[0031] The fixed support serves as a fixed point for the exhaust pipe of the exhaust device. It adopts a straight-through large tie rod compensator as the main body, and an expansion joint is set on the large tie rod compensator to compensate for radial thermal displacement. Due to the existence of the large tie rod compensator in the axial direction of the exhaust device, the large tie rod compensator is equivalent to a rigid pipe as a whole, which absorbs the vacuum force generated by the expansion joint by self-balancing, so that the vacuum force cannot act on the fixed support foundation of the exhaust pipe, reducing the design cost of the fixed support foundation of the exhaust pipe. At the same time, the thermal displacement of the low-pressure cylinder of the steam turbine can be transferred to the air-cooling island pipeline behind the exhaust device, ensuring the safe and stable operation of the low-pressure cylinder.
[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. An axial steam turbine exhaust device capable of self-balancing vacuum suction, characterized in that It comprises a connecting section (1), a large tie rod compensator (2), a fixed support (3) and a steam exhaust device hot well (6), wherein the connecting section (1) is arranged at the right end of the large tie rod compensator (2), the large tie rod compensator (2) is connected to an external low-pressure cylinder of a steam turbine through the connecting section (1), the left end of the large tie rod compensator (2) is connected to an air cooling island through an external pipeline, the fixed support (3) is installed on the bottom surface of the large tie rod compensator (2), the bottom surface of the large tie rod compensator (2) is provided with an opening, the top surface of the steam exhaust device hot well (6) is connected to the opening of the bottom surface of the large tie rod compensator (2), and the steam exhaust device hot well (6) is arranged on the right side of the fixed support (3).
2. The axial steam turbine exhaust device capable of self-balancing vacuum suction according to claim 1, characterized in that: The large tie rod compensator (2) is connected to an external steam turbine low-pressure cylinder via a connecting section (1), and the right end of the connecting section (1) is connected to the external steam turbine low-pressure cylinder in a rigid connection.
3. The axial steam turbine exhaust device capable of self-balancing vacuum suction according to claim 2, characterized in that: The right end of the connecting section (1) is connected to the external low-pressure cylinder of the steam turbine by a flange.
4. The axial steam turbine exhaust device capable of self-balancing vacuum suction according to claim 1, characterized in that It also includes a sliding support (4) and a spring support (5), which are installed on the bottom surface of the large tie rod compensator (2) from left to right in sequence, and the sliding support (4) is arranged on the right side of the hot well (6) of the exhaust device.
5. The axial steam turbine exhaust device capable of self-balancing vacuum suction according to claim 4, characterized in that: The fixed support (3) is installed on the left bottom surface of the large tie rod compensator (2), the sliding support (4) is installed on the right bottom surface of the large tie rod compensator (2), and the spring bracket (5) is installed on the right end bottom surface of the large tie rod compensator (2).
6. The axial steam turbine exhaust device capable of self-balancing vacuum suction according to claim 1, characterized in that: The hot well of the exhaust device adopts a cylindrical integral structure.
7. The axial steam turbine exhaust device capable of self-balancing vacuum suction according to claim 1, characterized in that: Compensation joints (7) are provided on the top surface of the exhaust device hot well (6) and the bottom surface of the large tie rod compensator (2).
8. The axial steam turbine exhaust device capable of self-balancing vacuum suction according to claim 1, characterized in that: A condensate deoxygenation device is detachably installed in the hot well (6) of the exhaust device.