Turbine brake device

Abstract

The utility model discloses a steam turbine brake device which comprises a box body, a rotating shaft, a linkage plate, a control assembly and a force application piece. Wherein the rotating shaft is rotatably arranged on the box body, a semicircular disc is arranged at one end, located in the box body, of the rotating shaft, and a notch is formed in the outer circle of the semicircular disc; the linkage plate is fixedly connected to the outer end of the rotating shaft; the control assembly at least comprises an ejector pin capable of intruding into or exiting from the notch; the force application piece is used for enabling the linkage plate to keep the trend of triggering the buckle of the quick-closing valve of the target steam turbine; when the linkage plate is located at the reset position, the front end of the ejector pin intrudes into the notch and is used for keeping the linkage plate at the reset position; when the ejector pin retreats from the notch, the force application piece is used for enabling the linkage plate to rotate around the axis of the rotating shaft so as to trigger the target steam turbine quick-closing valve hasp.

Description

Technical Field

[0001] This application relates to the field of steam turbine technology, specifically a steam turbine tripping device. Background Technology

[0002] The turbine quick-closing valve is a crucial component of the turbine, and its actuator is key to the turbine's proper shutdown. Considering that turbine operating environments are typically explosion-proof areas, electronic tripping devices must meet certain explosion-proof requirements, but such products are often costly and difficult to maintain. Designing a mechanical tripping device would not only save costs but also eliminate wiring complications; therefore, this application proposes a turbine tripping device. Summary of the Invention

[0003] The purpose of this application is to provide a turbine tripping device to solve the problems in the prior art.

[0004] To achieve the above objectives, this application provides the following technical solution: a turbine tripping device, comprising:

[0005] Box 1;

[0006] A rotating shaft 5 is rotatably mounted on the housing 1. A semi-circular disk 7 is provided at one end of the rotating shaft 5 located inside the housing 1. A notch 701 is opened on the outer circle of the semi-circular disk 7.

[0007] Linkage plate 4 is fixedly connected to the outer end of the rotating shaft 5;

[0008] Control component 2 includes at least one ejector pin 210 that can penetrate or exit the notch 701;

[0009] The force-applying component is used to keep the linkage plate 4 in a tendency to strike the target turbine quick-closing valve latch 9; when the linkage plate 4 is in the reset position, the front end of the ejector pin 210 enters the notch 701 to keep the linkage plate 4 in the reset position; when the ejector pin 210 exits the notch 701, the force-applying component is used to make the linkage plate 4 rotate around the axis of the rotating shaft 5 to strike the target turbine quick-closing valve latch 9.

[0010] Furthermore, the control component 2 includes:

[0011] The valve body 201 is fixedly connected to the housing 1, and a first cavity 211 and a second cavity 212 are coaxially formed on the valve body 201.

[0012] A valve cover 202 is mounted on the valve body 201. The valve cover 202 and the valve body 201 also form a third cavity 213 that is coaxially connected to the second cavity 212. The valve cover 202 is also provided with a gas source interface 203 for connecting compressed gas. The diameter of the second cavity 212 is larger than that of the first cavity 211, and the diameter of the third cavity 213 is larger than that of the second cavity 212.

[0013] The sliding core 204 is slidably installed in the third cavity 213, and the compressed gas connected to the gas source interface 203 is used to move the sliding core 204 toward the semi-disc 7.

[0014] The spring seat 206 is slidably mounted in the third cavity 213 and located on the side of the sliding core 204 facing the second cavity 212. A fourth cavity 214 is also formed between the spring seat 206 and the sliding core 204.

[0015] The ejector pin 210 is slidably mounted in the first cavity 211 and its end facing the valve cover 202 moves through the spring seat 206 and extends into the fourth cavity 214. The end of the ejector pin 210 in the fourth cavity 214 is equipped with a linkage 205. The linkage 205 is used by the spring seat 206 to drive the ejector pin 210 to move toward the valve cover 202.

[0016] An outer spring 207 is installed inside the second cavity 212 and sleeved outside the ejector pin 210, with its two ends abutting against the adjacent end faces of the second cavity 212 and the spring seat 206, respectively. The outer spring 207 is used to make the spring seat 206 tend to move closer to the valve cover 202.

[0017] Furthermore, the ejector pin 210 is provided with a flange 209 that slides with the first cavity 211, and an inner spring 208 is sleeved on the outer wall of the ejector pin 210 with its two ends abutting against the adjacent end faces of the flange 209 and the spring seat 206, respectively. The inner spring 208 is used to make the ejector pin 210 tend to move toward the semi-circular disk 7.

[0018] Furthermore, a sealing ring 215 is also fitted on the outer wall of the sliding core 204.

[0019] Furthermore, when compressed gas is connected to the gas source interface 203, the sliding core 204 pushes the spring seat 206 to abut against the end face of the third cavity 213 near the second cavity 212.

[0020] Furthermore, the force-applying component includes:

[0021] A torsion spring 3 is installed outside the rotating shaft 5, with one end engaged with the housing 1 and the other end engaged with the semi-circular disc 7 to make the rotating shaft 5 rotate toward the target turbine speed-closing valve latch 9.

[0022] The tension spring 6 is connected at one end to the linkage plate 4 and fixed at the other end to the target accessory. It is used to pull the linkage plate 4 to rotate around the axis of the rotating shaft 5 toward the target turbine quick-closing valve latch 9.

[0023] Furthermore, the free end of the linkage plate 4 is also provided with a hammer 401 for impacting the fast-closing valve latch 9 of the target steam turbine.

[0024] Furthermore, the semi-circular disk 7 is provided with a guide portion 702 at the front end of the notch 701, which is inclined in a direction away from the ejector pin 210, according to the reset direction of the linkage plate 4.

[0025] Furthermore, the housing 1 is also provided with two limiting screws 8, which are used to limit the linkage plate 4 to two extreme positions in the reset direction and the firing target turbine speed shut-off valve latch 9 when it rotates around the rotating shaft 5.

[0026] Furthermore, a bushing 10 is installed between the housing 1 and the rotating shaft 5, and an oil seal 11 is also installed on the housing 1 at the outer end of the bushing 10.

[0027] The beneficial effects of this application are as follows: The turbine tripping device provided by this application controls the position of the pin by the control component, so that the pin is inserted into the notch on the semi-circular disk to put the linkage plate in a reset ready-to-strike state or to put the pin out of the notch to unlock the state. When the lock is unlocked, the linkage plate is driven by the force-applying component to quickly hit the target turbine quick-closing valve latch, causing the quick-closing valve to close, thereby realizing the rapid shutdown of the turbine. It has a fast response speed, does not require a complex electrical control system, has high reliability, and saves costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the turbine tripping device of this application in the reset state;

[0029] Figure 2 for Figure 1 Sectional view of AA;

[0030] Figure 3 This is a schematic diagram of the turbine tripping device of this application in the firing state;

[0031] In the diagram: 1. Housing; 2. Control components; 201. Valve body; 202. Valve cover; 203. Air source interface; 204. Sliding core; 205. Linkage component; 206. Spring seat; 207. Outer spring; 208. Inner spring; 209. Flange; 210. Pin; 211. First cavity; 212. Second cavity; 213. Third cavity; 214. Fourth cavity; 215. Sealing ring; 3. Torsion spring; 4. Linkage plate; 401. Hammer head; 5. Rotating shaft; 6. Tension spring; 7. Semi-circular disc; 701. Notch; 702. Guide part; 8. Limit screw; 9. Target turbine quick-closing valve latch; 10. Bushing; 11. Oil seal. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In the embodiments of this application, please refer to Figures 1 to 3 The turbine tripping device provided in this application includes: a housing 1, a rotating shaft 5, a linkage plate 4, a control component 2, and a force-applying component; wherein,

[0034] A rotating shaft 5 is rotatably mounted on a housing 1. A semi-circular disk 7 is provided at one end of the rotating shaft 5 inside the housing 1. A notch 701 is provided on the outer circumference of the semi-circular disk 7. A linkage plate 4 is fixedly connected to the outer end of the rotating shaft 5. The control component 2 includes at least one ejector pin 210 that can penetrate or exit the notch 701. A force-applying component is used to keep the linkage plate 4 in a tendency to strike the target turbine quick-closing valve latch 9. When the linkage plate 4 is in the reset position, the front end of the ejector pin 210 penetrates into the notch 701 to keep the linkage plate 4 in the reset position. When the ejector pin 210 exits the notch 701, the force-applying component is used to make the linkage plate 4 rotate around the axis of the rotating shaft 5 to strike the target turbine quick-closing valve latch 9.

[0035] According to the structure provided in this embodiment, the turbine tripping device provided in this application controls the position of the pin by the control component 2, so that the pin 210 is inserted into the notch 701 on the semi-circular disk 7, causing the linkage plate 4 to be in a reset ready-to-strike state or the pin 210 is released from the notch and unlocked. When the unlocked state is reached, the linkage plate 4 is driven by the force-applying component to quickly strike the target turbine quick-closing valve latch 9, causing the quick-closing valve to close, thereby realizing the rapid shutdown of the turbine. It has a fast response speed, does not require a complex electrical control system, has high reliability, saves costs, and is far superior to the prior art.

[0036] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3The control component 2 includes: a valve body 201, a valve cover 202, a sliding core 204, a spring seat 206, and an outer spring 207; wherein,

[0037] The valve body 201 is fixedly connected to the housing 1. A first cavity 211 and a second cavity 212 are coaxially connected on the valve body 201. A valve cover 202 is placed on the valve body 201. The valve cover 202 and the valve body 201 also form a third cavity 213 coaxially connected to the second cavity 212. The valve cover 202 is also provided with a gas source interface 203 for connecting compressed gas. The diameter of the second cavity 212 is larger than that of the first cavity 211, and the diameter of the third cavity 213 is larger than that of the second cavity 212. A sliding core 204 is slidably mounted in the third cavity 213. The compressed gas connected to the gas source interface 203 is used to move the sliding core 204 towards the semi-circular disk 7. A spring seat 206 is slidably mounted in the third cavity 213 and located on the sliding core 204. 4. On the side facing the second cavity 212, a fourth cavity 214 is formed between the spring seat 206 and the sliding core 204; the ejector pin 210 is slidably installed in the first cavity 211 and extends through the spring seat 206 to the fourth cavity 214 at one end facing the valve cover 202. The ejector pin 210 is equipped with a linkage 205 at the end in the fourth cavity 214. The linkage 205 is used by the spring seat 206 to drive the ejector pin 210 to move toward the valve cover 202; the outer spring 207 is installed in the second cavity 212 and sleeved on the outside of the ejector pin 210, with both ends abutting against the adjacent end faces of the second cavity 212 and the spring seat 206, respectively. Here, the outer spring 207 is used to make the spring seat 206 tend to move closer to the valve cover 202. Here, the linkage 205 can adopt a pin or anti-loosening nut structure. In this embodiment, the anti-loosening nut structure is adopted, that is, an external thread section is provided at the end of the ejector pin 210 located in the fourth cavity 214. The anti-loosening nut is tightened on the external thread section. In this way, when the compressed gas is eliminated, the spring seat 206 moves towards the valve cover 202 under the action of the external spring 207, it can drive the ejector pin 210 to move in the same direction, so that the ejector pin 210 is disengaged from the notch 701, thereby releasing the linkage plate 4 from the reset position.

[0038] Understandably, the depth of the fourth cavity 214 in the axial direction of the ejector pin 210 is adapted to the stroke of the ejector pin 210 as it moves toward the fourth cavity 214 along its own axial direction.

[0039] According to the structure provided in this embodiment, when the steam turbine is running normally, the linkage plate 4 is in the reset position. At this time, the thrust generated by the compressed gas from the gas source interface 203 on the sliding core 204 overcomes the elastic force of the outer spring 207, causing the sliding core 204 to push the spring seat 206 forward. At this time, due to the action of the inner spring 208 (see below), the ejector pin 210 follows the spring seat 206 forward, and the front end of the ejector pin 210 inserts into the notch 701, thereby fixing the semi-circular disk 7 in the current reset position. Since the semi-circular disk 7 is connected to the rotating shaft 5 Connected to the linkage plate 4, the linkage plate 4 is in the reset state, at which time the force-applying component is in the energy storage state. When the compressed gas is discharged, the elastic force of the outer spring 207 pushes the spring seat 206 and the sliding core 204 backward, causing the ejector pin 210 to exit the notch 701, thereby releasing the lock on the semi-circular disk 7 and completing the release. At this time, under the action of the force-applying component, the linkage plate 4 rotates and hits the target turbine quick-closing valve latch 9, causing the quick-closing valve to close, thereby realizing the rapid shutdown of the turbine. The operation is highly reliable, thus ensuring the safe operation of the turbine.

[0040] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The ejector pin 210 is provided with a flange 209 that slides into the first cavity 211. The inner spring 208 is sleeved on the outer wall of the ejector pin 210 and its two ends abut against the adjacent end faces of the flange 209 and the spring seat 206, respectively. The inner spring 208 is used to make the ejector pin 210 tend to move towards the semi-circular disk 7. In this way, on the one hand, the flange 209 accurately guides the movement of the ejector pin 210 to maintain the stability of the ejector pin 210 in the radial position, thereby ensuring the consistency of the reset position of the linkage plate 4. On the other hand, it also serves as the force-bearing structure when the inner spring 208 applies force to the ejector pin 210, so that the end face of the anti-loosening nut abuts against the spring seat 206, thereby keeping the ejector pin 210 and the spring seat 206 relatively stable.

[0041] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The outer wall of the sliding core 204 is also fitted with a sealing ring 215, which prevents the leakage of compressed gas entering through the air source interface 203, ensures that the sliding core 204 has a stable thrust, and thus ensures the reliability of the entire device.

[0042] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 When compressed gas is connected to the gas source interface 203, the sliding core 204 pushes the spring seat 206 to abut against the end face of the third cavity 213 near the second cavity 212. In this way, the spring seat 206 can be effectively limited to ensure the stability of the position of the spring seat 206, thereby keeping the extension distance of the ejector pin 210 stable, which is beneficial to improving the reliability of the turbine tripping device.

[0043] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The force-applying components include a torsion spring 3 and a tension spring 6. The torsion spring 3 is installed outside the rotating shaft 5, with one end engaged with the housing 1 and the other end engaged with the semi-circular disc 7 to rotate the rotating shaft 5 toward the target turbine quick-closing valve latch 9. One end of the tension spring 6 is connected to the linkage plate 4, and the other end is fixed to the target accessory, to pull the linkage plate 4 to rotate around the axis of the rotating shaft 5 toward the target turbine quick-closing valve latch 9. Here, the target accessory can be a corresponding connecting part on the turbine. In this way, the torsion spring 3 and the tension spring 6 together provide the linkage plate 4 with the impact force to strike the target turbine quick-closing valve latch 9, which has the advantage of good safety redundancy and further improves the reliability of the turbine tripping device.

[0044] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The free end of the linkage plate 4 is also provided with a hammer 401 for impacting the target turbine quick-closing valve latch 9; thus, the linkage plate 4 will have greater force when impacting the target turbine quick-closing valve latch 9, ensuring that the target turbine quick-closing valve latch 9 performs the closing action.

[0045] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The semi-circular disk 7 has a guide portion 702 at the front end of the notch 701, which is inclined away from the ejector pin 210, in accordance with the reset direction of the linkage plate 4. Thus, during the reset process of the linkage plate 4, compressed gas is first connected through the air source interface 203 to extend the ejector pin 210. Then, the linkage plate 4 is lifted to reset. When the guide portion 702 of the semi-circular disk 7 contacts the ejector pin 210, the inclined surface of the guide portion 702 will generate an axial pushing force on the ejector pin 210, squeezing the ejector pin 210 back into the valve body 201. At this time, the inner spring 208 is in a compressed state. When the semi-circular disk 7 rotates until its notch 701 is aligned with the ejector pin 210, the thrust generated by the inner spring 208 causes the ejector pin 210 to move forward and enter the notch 701, locking the semi-circular disk 7 and achieving position locking. This facilitates the reset operation of the turbine tripping device and has good operational convenience and practicality.

[0046] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3 The housing 1 is also equipped with two limit screws 8, which are used to limit the two extreme positions of the linkage plate 4 in the reset direction and the direction of the target turbine fast shut-off valve latch 9 when it rotates around the rotating shaft 5. In this way, the linkage plate 4 can be ensured to operate within the limited range, which is conducive to improving the safety of this turbine tripping device.

[0047] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 3A bushing 10 is installed between the housing 1 and the rotating shaft 5, and an oil seal 11 is also installed on the housing 1 at the outer end of the bushing 10. In this way, the rotating shaft 5 can have less friction when rotating, and rotate more smoothly. At the same time, the oil seal 11 can prevent external dust and other impurities from entering the bushing 10, further improving the reliability of this turbine tripping device.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0051] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A turbine tripping device, characterized in that, include: Box (1); A rotating shaft (5) is rotatably mounted on the box (1). A semi-circular disk (7) is provided at one end of the rotating shaft (5) inside the box (1). A notch (701) is provided on the outer circle of the semi-circular disk (7). Linkage plate (4) is fixedly connected to the outer end of the rotating shaft (5); The control component (2) includes at least one ejector pin (210) that can penetrate or exit the notch (701). The force-applying component is used to keep the linkage plate (4) in a tendency to strike the target turbine quick-closing valve latch (9); when the linkage plate (4) is in the reset position, the front end of the ejector pin (210) enters the notch (701) to keep the linkage plate (4) in the reset position; when the ejector pin (210) exits the notch (701), the force-applying component is used to make the linkage plate (4) rotate around the axis of the rotating shaft (5) to strike the target turbine quick-closing valve latch (9).

2. The turbine tripping device according to claim 1, characterized in that, The control component (2) further includes: The valve body (201) is fixedly connected to the housing (1), and a first cavity (211) and a second cavity (212) are coaxially formed on the valve body (201). A valve cover (202) is provided on the valve body (201). The valve cover (202) and the valve body (201) also form a third cavity (213) that is coaxially connected with the second cavity (212). The valve cover (202) is also provided with a gas source interface (203) for connecting compressed gas. The diameter of the second cavity (212) is larger than that of the first cavity (211), and the diameter of the third cavity (213) is larger than that of the second cavity (212). The sliding core (204) is slidably installed in the third cavity (213), and the compressed gas connected to the gas source interface (203) is used to move the sliding core (204) toward the semi-disc (7); A spring seat (206) is slidably mounted in the third cavity (213) and located on the side of the sliding core (204) facing the second cavity (212). A fourth cavity (214) is also formed between the spring seat (206) and the sliding core (204). The ejector pin (210) is slidably mounted in the first cavity (211) and extends through the spring seat (206) to the fourth cavity (214) at one end facing the valve cover (202); the ejector pin (210) is equipped with a linkage (205) at the end in the fourth cavity (214), and the linkage (205) is used by the spring seat (206) to drive the ejector pin (210) to move toward the valve cover (202); An outer spring (207) is installed inside the second cavity (212), sleeved outside the ejector pin (210), and its two ends abut against the adjacent end faces of the second cavity (212) and the spring seat (206), respectively. The outer spring (207) is used to make the spring seat (206) tend to move closer to the valve cover (202).

3. The turbine tripping device according to claim 2, characterized in that: The ejector pin (210) is provided with a flange (209) that slides with the first cavity (211). An inner spring (208) is sleeved on the outer wall of the ejector pin (210) and its two ends abut against the adjacent end faces of the flange (209) and the spring seat (206) respectively. The inner spring (208) is used to make the ejector pin (210) tend to move toward the semi-circular disk (7).

4. The turbine tripping device according to claim 2, characterized in that: The outer wall of the sliding core (204) is also fitted with a sealing ring (215).

5. The turbine tripping device according to claim 2, characterized in that: When compressed gas is connected to the gas source interface (203), the sliding core (204) pushes the spring seat (206) to abut against the end face of the third cavity (213) near the second cavity (212).

6. The turbine tripping device according to claim 1, characterized in that, The force-applying component includes: A torsion spring (3) is installed outside the rotating shaft (5), with one end engaged with the housing (1) and the other end engaged with the semi-circular disc (7) to make the rotating shaft (5) rotate toward the target turbine speed shut-off valve latch (9); A tension spring (6) is connected at one end to the linkage plate (4) and fixed at the other end to the target fitting. It is used to pull the linkage plate (4) to rotate around the axis of the rotating shaft (5) toward the target turbine quick-closing valve latch (9).

7. The turbine tripping device according to any one of claims 1 to 6, characterized in that: The free end of the linkage plate (4) is also provided with a hammer (401) for impacting the latch (9) of the target turbine quick-closing valve.

8. The turbine tripping device according to claim 7, characterized in that: The semi-circular disk (7) has a guide portion (702) at the front end of the notch (701) that is inclined away from the ejector pin (210) according to the reset direction of the linkage plate (4).

9. The turbine tripping device according to claim 1, characterized in that: The housing (1) is also provided with limit screws (8). There are two limit screws (8), which are used to limit the two extreme positions of the linkage plate (4) when it rotates around the rotating shaft (5) in the reset direction and in the direction of the target turbine speed shut-off valve latch (9).

10. The turbine tripping device according to claim 1, characterized in that: A bushing (10) is installed between the housing (1) and the rotating shaft (5), and an oil seal (11) is also installed on the housing (1) at the outer end of the bushing (10).

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