Steam turbine gland leakage pressure leading device with self-locking quick release mechanism

Abstract

The application provides a steam turbine gland leakage pressure leading device with a self-locking quick disassembly mechanism and belongs to the technical field of steam turbine operation detection. The device comprises a body seat which can be inserted into a steam turbine interface, and a locking and unlocking assembly is arranged between the body seat and the steam turbine interface. A connecting plate is rotatably arranged in the body seat, and a pressing block and a clamping block are fixed on the connecting plate. A clamping frame is arranged in the steam turbine interface, and the clamping block is clamped with the clamping frame to realize the axial self-locking of the body seat. A second sliding shaft with a sliding block is arranged on the steam turbine interface, the sliding block is extruded against the pressing block by pressing the second sliding shaft, the connecting plate is driven to rotate to make the clamping block exit the clamping frame, and the quick unlocking can be realized. The application utilizes mechanical linkage to form a self-locking quick disassembly structure, eliminates the traditional cutting and welding operation, and realizes efficient and safe disassembly. The structure is stable in stress, can effectively adapt to the vibration of the unit and the thermal expansion and cold shrinkage working conditions, cooperates with the internal and external sealing design, and guarantees the tightness of the pressure leading channel and the accuracy of the detection data.

Description

Technical Field

[0001] This application relates to the field of steam turbine operation detection technology, and in particular to a steam turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism. Background Technology

[0002] During operation, steam turbines are equipped with steam seals between their high-pressure and low-pressure cylinders, as well as at the ends of each shaft. These seals are primarily used to reduce leakage of working steam or cross-leakage between steam at different pressure levels. To monitor steam seal leakage, analyze turbine efficiency changes, and provide data for equipment maintenance, pressure taps are typically placed near the steam seals to guide leaked steam or gas to external monitoring devices for measuring parameters such as pressure and flow rate.

[0003] However, most existing pressure tapping structures for steam seal leaks use welded nozzles or rigidly connected pressure taps, resulting in a relatively fixed overall structure that makes daily disassembly and assembly extremely inconvenient. When maintenance needs arise, such as replacing testing equipment, calibrating pressure taps, or clearing blockages in the pressure tapping channels, the unit often needs to be shut down, and manual hot work such as mechanical cutting and re-welding is required. This traditional maintenance method is not only labor-intensive and time-consuming, but also has poor safety during on-site operations.

[0004] Meanwhile, existing pressure tapping structures generally lack reliable quick-locking and unlocking mechanisms in their connection design, resulting in an insufficiently secure connection between the pressure tapping seat and the turbine casing interface. Under the severe vibrations and complex operating conditions such as thermal expansion and contraction that accompany long-term turbine operation, rigid connections or mating parts lacking self-locking constraints are prone to mechanical loosening and media leakage. Once the seal at the pressure tapping interface fails, it will not only cause high-temperature steam leakage but also directly lead to pressure distortion within the pressure tapping channel, severely affecting the accuracy of leakage detection data and thus failing to provide reliable support for the safe operation and efficiency analysis of the unit.

[0005] Therefore, this application provides a turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism to meet the requirements. Summary of the Invention

[0006] The technical problem addressed by this application is that existing steam seal leakage pressure tapping structures mostly use welded nozzles or rigidly connected pressure tapping seats, which are inconvenient to disassemble and assemble. When replacing, calibrating, or dealing with blockages in the pressure tapping seats, the machine must be stopped and cutting and welding operations must be performed, which is labor-intensive and has poor safety. At the same time, some pressure tapping structures lack reliable quick locking and unlocking mechanisms, resulting in an unstable connection between the pressure tapping seat and the turbine interface. Under turbine vibration and thermal expansion and contraction conditions, loosening and leakage are likely to occur, which in turn affects the accuracy of leakage detection data.

[0007] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0008] A steam turbine seal leakage pressure relief device with a self-locking quick-release mechanism includes a main body base and a steam turbine interface mounted on the steam turbine casing. The main body base can be inserted into the steam turbine interface. A locking assembly for locking the main body base and an unlocking assembly for releasing the locking are provided between the main body base and the steam turbine interface. A retaining frame is slidably connected inside the steam turbine interface. An installation cavity is provided inside the main body base, and a connecting shaft is fixedly connected inside the installation cavity. The locking assembly includes a connecting plate rotatably connected to the outside of the connecting shaft. A pressure block is fixedly connected to the middle of the connecting plate, and a retaining block is fixedly connected to the other end of the connecting plate. The retaining frame engages with the retaining block. The unlocking assembly includes a second sliding shaft disposed on the steam turbine interface. A slider is fixedly connected to the inner end of the second sliding shaft. The slider applies pressure to the pressure block, causing the connecting plate to rotate and releasing the retaining block from the retaining frame.

[0009] Furthermore, a first spring is provided inside the mounting cavity. One end of the first spring abuts against the support surface formed inside the main body seat, and the other end abuts against the lower end face of the connecting plate. The first spring is used to apply an elastic return force to the connecting plate, driving the locking block to extend outward.

[0010] Furthermore, a first guide hole is formed inside the turbine interface, and a first sliding shaft is slidably connected inside the first guide hole. The retaining frame is fixedly connected to the first sliding shaft. A stepped surface is formed on the inner wall of the turbine interface. A third spring is sleeved on the outer side of the first sliding shaft, and one end of the third spring abuts against the upper end surface of the retaining frame, and the other end abuts against the stepped surface. After the force is released, the third spring can drive the retaining frame to return to its axial position along the first guide hole.

[0011] Furthermore, a mounting cavity for accommodating the card frame is formed within the turbine interface. The inner wall of the mounting cavity cooperates with the outer wall of the card frame, providing auxiliary guidance for the movement of the card frame and limiting circumferential displacement of the card frame. A limiting surface that cooperates with the card frame is formed within the mounting cavity to limit the maximum upward and downward movement of the card frame.

[0012] Furthermore, the turbine interface is provided with a second guide hole for the second sliding shaft to pass through, and the second sliding shaft slides along the axial direction of the second guide hole; a sliding cavity is formed inside the turbine interface, the slider is slidably connected to the sliding cavity and moves along the sliding cavity, a stepped surface is formed on the inner wall of the turbine interface, a fourth spring is sleeved on the outer side of the second sliding shaft, one end of the fourth spring abuts against the upper end face of the slider, and the other end abuts against the stepped surface; a limiting surface is formed inside the sliding cavity to limit the movement stroke of the slider.

[0013] Furthermore, the inner wall of the sliding cavity and the outer wall of the slider are guided to guide the movement direction of the slider.

[0014] Furthermore, a top post is slidably connected inside the main body, and a second spring is provided at the lower end of the top post; the outer end of the top post extends out of the outer wall of the main body and abuts against the bottom of the card frame; one end of the second spring abuts against the support surface formed inside the main body, and the other end abuts against the lower end surface of the top post; the second spring applies an outward elastic thrust to the top post, so that the top post pushes the card frame to reset after the card block exits the card frame.

[0015] Furthermore, a sealing structure for sealing the gap between the main body base and the turbine interface is provided; the sealing structure includes an annular sealing groove formed on the outer circumferential surface of the main body base and an O-ring installed in the annular sealing groove, and a sealing gasket is provided at the end face mating point of the main body base and the turbine interface.

[0016] Furthermore, a circumferential positioning structure is provided between the main body base and the turbine interface; the circumferential positioning structure includes a guide key disposed on the outer wall of the main body base and a guide groove disposed on the inner wall of the turbine interface, the guide key and the guide groove cooperating to allow the main body base to be inserted into the turbine interface at a predetermined angle so that the pressure block and the slider are aligned.

[0017] Furthermore, the front end face of the main body is provided with multiple openings. The inner end of the opening is used to communicate with the steam seal leakage area inside the steam turbine, and the outer end is connected to the pressure detection device, flow detection device or purging and condensate discharge pipeline through a pressure tapping joint, threaded joint or external pipeline.

[0018] Compared with the prior art, this application has at least the following advantages: 1. This application utilizes a locking assembly formed by the interaction of a connecting plate and a locking block on the main body base with a locking frame inside the turbine interface. A simple rotation and locking action is sufficient to reliably lock the main body base to the turbine interface. This locking structure is compact and provides stable force, effectively adapting to vibrations and thermal expansion and contraction generated during turbine operation, thus reducing the risk of loosening and leakage of the pressure-pressurizing device.

[0019] 2. This application sets a second sliding shaft and a slider on the turbine interface, which are linked with the pressure block on the main body. The operator only needs to press the second sliding shaft from the outside to drive the locking block out of the locking frame, realizing the quick disassembly of the device and eliminating the need for traditional cutting and welding operations. At the same time, combined with the interaction of the second spring, the third spring, the fourth spring and the top column, the unlocking components such as the slider and the locking frame are automatically reset, reducing manual adjustment steps and improving the maintenance efficiency and reusability of the device.

[0020] 3. This application features an opening on the front face of the main body that communicates with the leaking area of ​​the steam seal. This opening serves both as a pressure tapping channel to guide leaked gas to an external device for detection and as a maintenance channel for online purging and condensation removal of the pipeline. This design effectively avoids internal blockage caused by condensate and impurities. Combined with the internal sealing structure, it further ensures the accuracy of leak detection data and the long-term stability of the pressure tapping device. Attached Figure Description

[0021] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present application and, together with the specification, further serve to explain the principles of the present application and enable those skilled in the art to implement and use the present application.

[0022] Figure 1 This is a three-dimensional schematic diagram of a steam turbine steam seal leakage relief device with a self-locking quick-release mechanism according to this application; Figure 2 This is a schematic diagram of the exploded structure of the device in this application; Figure 3 This is a schematic diagram of the circumferential positioning structure in this application; Figure 4 This is a cross-sectional view of the locking assembly inside the main body of the present application. Figure 5 This is a cross-sectional view of the internal unlocking components and card frame of the steam turbine interface in this application; Figure 6 This is a schematic diagram of the locking and unlocking components in this application; Figure 7 This is a schematic diagram of the locking and unlocking components working together in this application.

[0023] Figure label: 1. Body base; 2. Connecting shaft; 3. Connecting plate; 4. Pressure block; 5. First spring; 6. Locking block; 7. Second spring; 8. Top column; 9. Steam turbine interface; 10. First sliding shaft; 11. Locking frame; 12. Third spring; 13. Second sliding shaft; 14. Sliding block; 15. Fourth spring; 16. Opening; 17. Annular sealing groove; 18. O-ring seal; 19. Sealing gasket; 20. Guide key; 21. Guide groove; 22. Mounting cavity; 23. First guide hole; 24. Locking frame mounting cavity; 25. Second guide hole; 26. Sliding cavity.

[0024] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of this application. However, this is only for illustrative purposes and is not intended to limit this application to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0025] The following is a detailed description of a steam turbine seal leakage pressure relief device with a self-locking quick-release mechanism provided in this application, in conjunction with the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this application.

[0026] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0027] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0028] It is understood that the meanings of “on”, “above”, and “above” in this application should be interpreted in the broadest sense, such that “on” means not only “directly on” something, but also includes something with an intermediary feature or layer, and that “above” or “above” means not only “on” something, but also includes something “above” something without an intermediary feature or layer.

[0029] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0030] Please see the appendix Figure 1 -Appendix Figure 3 This application provides a turbine steam seal leakage pressure tapping device with a self-locking quick-release mechanism, including a main body base 1 and a turbine interface 9. The main body base 1 can be inserted into the turbine interface 9, which is fixedly installed at a predetermined pressure tapping position on the turbine casing. Its inner cavity is connected to the turbine steam seal leakage area. The main body base 1 is a hollow cylindrical structure, inserted axially into the turbine interface 9, and detachably connected by a locking assembly disposed between the main body base 1 and the turbine interface 9.

[0031] The front end face of the main body 1 is provided with multiple openings 16, which are arranged at intervals along the front end face of the main body 1. The inner end of the opening 16 is connected to the steam seal leakage area inside the steam turbine, and the outer end is connected to the pressure detection device, flow detection device or purging and condensate removal pipeline through pressure tapping joint, threaded joint or external pipeline. Thus, the steam or gas generated by the steam seal leakage can be led out to the external detection device through the opening 16. At the same time, when maintenance is required, the pressure tapping channel can also be purged or condensate removed through the opening 16 to prevent condensate and impurities from clogging the pressure tapping channel.

[0032] An annular sealing groove 17 is formed on the outer circumferential surface of the main body seat 1, and an O-ring seal 18 is installed in the annular sealing groove 17. When the main body seat 1 is inserted into the turbine interface 9, the O-ring seal 18 undergoes elastic deformation due to the joint compression of the outer circumferential surface of the main body seat 1 and the inner wall of the turbine interface 9, sealing the radial fit gap between the main body seat 1 and the turbine interface 9, preventing leaked steam or detection gas from leaking out from the fit gap between the two. A sealing gasket 19 is provided at the end face mating point of the main body seat 1 and the turbine interface 9. The sealing gasket 19 is located between the end face of the main body seat 1 and the end face of the turbine interface 9. After the main body seat 1 is inserted into place and locked, the sealing gasket 19 is pressed between the two end faces to form an end face seal. Through the cooperation of the O-ring seal 18 and the sealing gasket 19, radial sealing and end face sealing can be achieved simultaneously, improving the sealing stability of the pressure tapping seat under turbine vibration and hot operating environments.

[0033] Please see the appendix Figure 3 -Appendix Figure 7 In this embodiment, a circumferential positioning structure is provided between the main body base 1 and the turbine interface 9. The circumferential positioning structure includes a guide key 20 and a guide groove 21. The guide key 20 is located on the outer wall of the main body base 1, and the guide groove 21 is located on the inner wall of the turbine interface 9. During installation, the guide key 20 slides in along the guide groove 21, so that the main body base 1 is inserted into the turbine interface 9 at a predetermined angle, ensuring that the pressure block 4 and the slider 14 are aligned.

[0034] A locking assembly is provided between the main body base 1 and the turbine interface 9. The locking assembly includes a connecting shaft 2, a connecting plate 3, a pressure block 4, a first spring 5, and a locking block 6. The connecting shaft 2 is fixedly connected to the mounting cavity 22 inside the main body base 1. The connecting plate 3 is rotatably connected to the outside of the connecting shaft 2. The connecting plate 3 is rotatably connected to the main body base 1 through the connecting shaft 2, so that the connecting plate 3 can rotate around the connecting shaft 2. The connecting plate 3 has a bent swing arm structure. One end of the connecting plate 3 cooperates with the first spring 5, and the other end is fixedly connected to the locking block 6. The pressure block 4 is fixedly connected to the middle of the connecting plate 3. The first spring 5 is set in the mounting cavity 22 of the main body base 1. One end of the first spring 5 abuts against the support surface formed inside the main body base 1, and the other end abuts against the lower end face of the connecting plate 3. The first spring 5 is used to apply an elastic return force to the connecting plate 3, driving the locking block 6 to extend outward.

[0035] The locking block 6 extends or retracts as the connecting plate 3 rotates. When the main body seat 1 is inserted into the turbine interface 9 and reaches the predetermined installation position, the locking block 6 extends outward under the action of the first spring 5 and extends into the locking frame 11 inside the turbine interface 9, so that the main body seat 1 and the turbine interface 9 form a locking engagement and lock, restricting the axial disengagement of the main body seat 1 relative to the turbine interface 9.

[0036] A retaining frame 11 is slidably connected inside the turbine interface 9, and the retaining frame 11 engages with the retaining block 6. The retaining frame 11 is a frame-shaped component with a retaining cavity. After the retaining block 6 extends into the retaining frame 11, the inner wall of the retaining frame 11 axially limits the retaining block 6. The retaining frame 11 is fixedly connected to the first sliding shaft 10. The first sliding shaft 10 passes through the first guide hole 23 formed inside the turbine interface 9. The first guide hole 23 guides the first sliding shaft 10, causing the first sliding shaft 10 and the retaining frame 11 to move in a predetermined direction, preventing the retaining frame 11 from deflecting during movement.

[0037] The turbine interface 9 has a frame mounting cavity 24 for accommodating the frame 11. The inner wall of the frame mounting cavity 24 cooperates with the outer wall of the frame 11, which plays an auxiliary guiding role in the movement of the frame 11 and is used to limit the circumferential displacement of the frame 11. A third spring 12 is sleeved on the outside of the first sliding shaft 10. One end of the third spring 12 abuts against the upper end face of the frame 11, and the other end abuts against the stepped surface formed on the inner wall of the turbine interface 9. After the force is released, the third spring 12 can drive the frame 11 to return to its axial position along the first guide hole 23.

[0038] The mounting cavity 24 of the card frame has a limiting surface that cooperates with the card frame 11. The limiting surface includes an upper limiting surface for limiting the maximum upward movement of the card frame 11 and a lower limiting surface for limiting the maximum downward movement of the card frame 11.

[0039] A top post 8 is slidably connected inside the main body 1. A second spring 7 and the top post 8 are provided. The top post 8 can slide up and down inside the main body 1. The outer end of the top post 8 extends out of the outer wall of the main body 1 and abuts against the bottom of the frame 11. The second spring 7 is provided at the lower end of the top post 8. One end of the second spring 7 abuts against the support surface formed inside the main body 1, and the other end abuts against the lower end surface of the top post 8. The second spring 7 applies an outward elastic force to the top post 8, so that the top post 8 pushes the frame 11 to reset after the block 6 exits the frame 11.

[0040] Please see the appendix Figure 1 Appendix Figure 5 -Appendix Figure 7 In this embodiment, an unlocking assembly for releasing the lock is provided between the main body 1 and the turbine interface 9. The unlocking assembly includes a second sliding shaft 13, a slider 14, and a fourth spring 15. The turbine interface 9 is provided with a second guide hole 25 for the second sliding shaft 13 to pass through. The second sliding shaft 13 slides axially along the second guide hole 25. The outer end of the second sliding shaft 13 extends out of the outer side of the turbine interface 9, and the inner end of the second sliding shaft 13 is fixedly connected to the slider 14. When the second sliding shaft 13 is pressed, it can drive the slider 14 to move synchronously.

[0041] The slider 14 is slidably connected to the sliding cavity 26 formed in the turbine interface 9. The inner wall of the sliding cavity 26 is guided to cooperate with the outer wall of the slider 14 to guide the movement direction of the slider 14. The slider 14 is located above the pressure block 4. When the second sliding shaft 13 is pressed, the slider 14 moves along the sliding cavity 26 and contacts the pressure block 4, applying pressure to the pressure block 4.

[0042] The fourth spring 15 is sleeved on the outside of the second sliding shaft 13. One end of the fourth spring 15 abuts against the upper end face of the slider 14, and the other end abuts against the stepped surface formed on the inner wall of the turbine interface 9. A limiting surface is formed in the sliding cavity 26 to limit the movement stroke of the slider 14, defining the maximum pressing position and the maximum reset position of the slider 14.

[0043] Please see the appendix Figure 1 -Appendix Figure 7 In this embodiment, when installing the main body seat 1, the main body seat 1 is inserted axially into the turbine interface 9. During the insertion process, the O-ring seal 18 enters the inner wall of the turbine interface 9 and undergoes elastic compression. The sealing gasket 19 gradually approaches the end face of the turbine interface 9. Under the guidance of the inner wall of the turbine interface 9, the locking block 6 causes the connecting plate 3 to rotate around the connecting shaft 2, and the first spring 5 is compressed. When the main body seat 1 is inserted into place, the locking block 6 aligns with the locking cavity of the locking frame 11. The first spring 5 rebounds and pushes the connecting plate 3 to reset, causing the locking block 6 to extend into the inside of the locking frame 11. The main body seat 1 is locked by the locking block 6 and the locking frame 11, and the O-ring seal 18 and the sealing gasket 19 form a seal.

[0044] During the steam seal leakage detection process, steam or gas in the steam seal leakage area enters the pressure tapping channel of the main body seat 1 through the opening 16, and is led out to the detection device through the external pressure tapping pipeline.

[0045] When disassembling the main body seat 1, the second sliding shaft 13 is pressed from the outside of the turbine interface 9. The second sliding shaft 13 moves along the second guide hole 25, driving the slider 14 to move along the sliding cavity 26. The slider 14 presses against the pressure block 4, applying pressure to the pressure block 4. After the pressure block 4 is subjected to pressure, it drives the connecting plate 3 to rotate around the connecting shaft 2. When the connecting plate 3 rotates, it compresses the first spring 5, driving the locking block 6 to retract inward, so that the locking block 6 gradually exits the locking cavity of the locking frame 11. When the locking block 6 completely disengages from the locking frame 11, the axial locking between the main body seat 1 and the turbine interface 9 is released.

[0046] After the locking block 6 exits the locking frame 11, the second spring 7 pushes the top column 8 to reset, and the top column 8 applies a pushing force to the locking frame 11. At the same time, the third spring 12 drives the locking frame 11 to reset along the first guide hole 23. The locking frame 11 stops at the predetermined position under the action of the limiting surface. The second sliding shaft 13 is released, the fourth spring 15 rebounds, and drives the slider 14 to reset along the sliding cavity 26, so that the second sliding shaft 13 resets along the second guide hole 25. After the slider 14 is reset, it separates from the pressure block 4. The connecting plate 3 returns to the initial state under the action of the first spring 5. Then the main body seat 1 can be pulled out axially from the turbine interface 9.

[0047] The working principle of this application is as follows: The main body seat 1 is aligned with the turbine interface 9, and the guide key 20 slides into the guide groove 21, pushing the main body seat 1 axially inward. The O-ring 18 on the outer circumference of the main body seat 1 deforms under the pressure of the main body seat 1 and the inner wall of the turbine interface 9, forming a radial seal. The sealing gasket 19 at the end face of the main body seat 1 and the turbine interface 9 is then pressed together, forming an end face seal. During the advancement of the main body seat 1, the locking block 6 contacts the inner wall of the turbine interface 9, causing the connecting plate 3 to rotate around the connecting shaft 2, while simultaneously compressing the first spring 5. When the main body seat 1 is advanced to the set installation position, the locking block 6 aligns with the locking frame 11 inside the turbine interface 9. The first spring 5 loses its restraining force and rebounds, pushing the connecting plate 3 to rotate in the opposite direction, causing the locking block 6 to extend outward and engage with the locking frame 11. Thus, the locking block 6 and the locking frame 11 cooperate, completing the axial limiting and locking of the main body seat 1.

[0048] When the device is in a locked and sealed state, steam or gas in the steam seal leakage area inside the steam turbine enters the internal pressure tapping channel through the opening 16 on the front end face of the main body seat 1, and then flows to the external pressure or flow detection device.

[0049] Pressing the second sliding shaft 13 inward from the outside of the turbine interface 9 causes the second sliding shaft 13 to move along the second guide hole 25, driving the slider 14 at its end to move within the sliding cavity 26. The slider 14 contacts and pushes the pressure block 4, causing the connecting plate 3 to rotate around the connecting shaft 2, thereby compressing the first spring 5. As the connecting plate 3 rotates, it causes the locking block 6 to retract inward, gradually disengaging from the locking cavity of the locking frame 11. Once the locking block 6 is completely disengaged from the locking frame 11, the axial limit between the main body seat 1 and the turbine interface 9 is released. After the locking block 6 is disengaged, the second spring 7 pushes the top column 8 to reset, and the top column 8 applies a thrust to the locking frame 11. Simultaneously, the third spring 12 drives the locking frame 11 to slide and reset along the first guide hole 23, and under the action of the limiting surface, the locking frame 11 stops at the set position. Then, the second sliding shaft 13 is released, and the fourth spring 15 rebounds, causing the slider 14 and the second sliding shaft 13 to move in the opposite direction and reset. After the slider 14 retracts, it separates from the pressure block 4. The connecting plate 3 is reset under the action of the first spring 5. The operator can pull the main body seat 1 out of the turbine interface 9 along the axial direction to complete the disassembly of the device.

[0050] This application covers any alternatives, modifications, equivalent methods, and solutions made within the spirit and scope of this application. To provide the public with a thorough understanding of this application, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this application even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the substance of this application, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0051] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A steam turbine seal leakage pressure relief device with a self-locking quick-release mechanism, comprising a main body base (1) and a steam turbine interface (9) installed on the steam turbine casing, characterized in that: The main body base (1) can be inserted into the turbine interface (9); A locking component for locking the main body (1) and an unlocking component for releasing the lock are provided between the main body (1) and the turbine interface (9); The turbine interface (9) is slidably connected to a retaining frame (11); The main body (1) has an installation cavity (22) inside, and a connecting shaft (2) is fixedly connected inside the installation cavity (22). The locking assembly includes a connecting plate (3) rotatably connected to the outside of the connecting shaft (2), a pressure block (4) is fixedly connected to the middle of the connecting plate (3), and a locking block (6) is fixedly connected to the other end of the connecting plate (3). The locking frame (11) engages with the locking block (6). The unlocking component includes a second sliding shaft (13) disposed on the turbine interface (9). The inner end of the second sliding shaft (13) is fixedly connected to a slider (14). The slider (14) is used to apply pressure to the pressure block (4) and drive the connecting plate (3) to rotate, so that the locking block (6) is released from the locking frame (11).

2. The turbine steam seal leakage pressure relief device with self-locking quick-release mechanism according to claim 1, characterized in that, A first spring (5) is provided in the mounting cavity (22). One end of the first spring (5) abuts against the support surface formed in the body seat (1), and the other end abuts against the lower end face of the connecting plate (3). The first spring (5) is used to apply an elastic return force to the connecting plate (3) to drive the locking block (6) to extend outward.

3. A turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism according to claim 1, characterized in that, A first guide hole (23) is formed in the turbine interface (9), and a first sliding shaft (10) is slidably connected in the first guide hole (23). The frame (11) is fixedly connected to the first sliding shaft (10). The inner wall of the turbine interface (9) has a stepped surface. A third spring (12) is sleeved on the outer side of the first sliding shaft (10). One end of the third spring (12) abuts against the upper end face of the frame (11), and the other end abuts against the stepped surface of the inner wall of the turbine interface (9). After the force is released, the third spring (12) can drive the frame (11) to return to its axial position along the first guide hole (23).

4. A turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism according to claim 1, characterized in that, The turbine interface (9) has a frame mounting cavity (24) for accommodating the frame (11). The inner wall of the frame mounting cavity (24) cooperates with the outer wall of the frame (11) to provide auxiliary guidance for the movement of the frame (11) and to limit the circumferential displacement of the frame (11). The mounting cavity (24) of the card frame has a limiting surface that cooperates with the card frame (11) to limit the maximum upward and downward movement of the card frame (11).

5. A turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism according to claim 1, characterized in that, The turbine interface (9) is provided with a second guide hole (25) for the second sliding shaft (13) to pass through, and the second sliding shaft (13) slides along the axial direction of the second guide hole (25); A sliding cavity (26) is formed inside the turbine interface (9). The slider (14) is slidably connected to the sliding cavity (26) and moves along the sliding cavity (26). A stepped surface is formed on the inner wall of the turbine interface (9). A fourth spring (15) is sleeved on the outer side of the second sliding shaft (13). One end of the fourth spring (15) abuts against the upper end face of the slider (14), and the other end abuts against the stepped surface of the inner wall of the turbine interface (9). The sliding cavity (26) has a limiting surface formed inside to limit the movement of the slider (14).

6. A turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism according to claim 5, characterized in that, The inner wall of the sliding cavity (26) is guided to cooperate with the outer wall of the slider (14) to guide the movement direction of the slider (14).

7. A turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism according to claim 1, characterized in that, A top post (8) is slidably connected inside the main body (1), and a second spring (7) is provided at the lower end of the top post (8). The outer end of the top column (8) extends out of the outer wall of the main body seat (1) and abuts against the bottom of the card frame (11); One end of the second spring (7) abuts against the support surface formed inside the body seat (1), and the other end abuts against the lower end face of the top post (8). The second spring (7) applies an outward elastic thrust to the top post (8), so that the top post (8) pushes the card frame (11) to reset after the card block (6) exits the card frame (11).

8. A turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism according to claim 1, characterized in that, A sealing structure for sealing the gap between the main body base (1) and the turbine interface (9) is provided; The sealing structure includes an annular sealing groove (17) opened on the outer circumferential surface of the main body (1) and an O-ring (18) installed in the annular sealing groove (17). A sealing gasket (19) is provided at the end face of the main body (1) and the turbine interface (9).

9. A turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism according to claim 2, characterized in that, A circumferential positioning structure is provided between the main body base (1) and the turbine interface (9); The circumferential positioning structure includes a guide key (20) disposed on the outer wall of the main body seat (1) and a guide groove (21) disposed on the inner wall of the turbine interface (9). The guide key (20) and the guide groove (21) cooperate to allow the main body seat (1) to be inserted into the turbine interface (9) at a predetermined angle so that the pressure block (4) and the slider (14) are aligned.

10. A turbine steam seal leakage pressure relief device with a self-locking quick-release mechanism according to claim 1, characterized in that, The front end face of the main body (1) is provided with multiple openings (16). The inner end of the opening (16) is used to communicate with the steam seal leakage area inside the steam turbine, and the outer end is connected to the pressure detection device, flow detection device or purging and condensate discharge pipeline through a pressure tapping joint, threaded joint or external pipeline.

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