Experimental device and method for regulating valve leakage of steam turbine

Abstract

The application discloses a kind of experimental device and method of steam turbine governing valve leakage, it is related to steam turbine experimental device technical field in thermal power plant, including following steps: the rotating speed of steam turbine is uploaded to monitoring device, and carries out flickering prompt, user operates on control panel, control panel can be operated to close governing valve, and maintain closed state;User checks the rotating speed drop to 1000rpm below on monitoring device, can open the governing valve, the application has the quick air-tightness experimental check to the governing valve of steam turbine, can also be the rotating speed of steam turbine and give warning and early warning, through the double warning alarm form of sound and light alarm, so that the actual rotating speed value of user can be observed in time, for user to make reaction in time, and can be according to the continuous rising of steam turbine rotating speed, this rising alarm mode can be followed by change, and then have excellent safety, to avoid the occurrence of safety accident due to accident.

Description

Technical Field

[0001] This invention relates to the technical field of experimental devices for steam turbines in thermal power plants, specifically to an experimental device and method for detecting leakage in the speed regulating valve of a steam turbine. Background Technology

[0002] Steam turbines are a common type of thermal power generator, and they can also be used in equipment in the metallurgical and chemical industries.

[0003] After the initial start-up of a steam turbine, technical modifications to the speed control system, or major overhaul and maintenance of the steam turbine, a tightness test needs to be conducted on the speed control valve. The existing test method is to close the speed control valve, then open the corresponding main valve, then control the steam turbine speed to increase to 3000 rpm, and then observe whether the steam turbine speed drops below 1000 rpm, in order to determine the leakage of the corresponding speed control valve.

[0004] During the experiment, when the turbine speed increases to 3360 rpm, the operator needs to stop the turbine in time to prevent damage or safety accidents. However, this safety procedure is manually operated, and manual operation is unpredictable. If the operator is negligent and fails to observe the turbine speed, a safety accident may occur, resulting in poor safety of the experiment. Summary of the Invention

[0005] The purpose of this invention is to provide an experimental apparatus and method for detecting leakage in the speed regulating valve of a steam turbine, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an experimental method for detecting leakage in a steam turbine speed regulating valve, comprising the following steps:

[0007] Step S1: The user sets the steam parameters on the control panel, stabilizes the turbine speed at 3000 rpm, then checks the working status of the high-pressure oil pump and conducts a trial run.

[0008] Step S2: The real-time data of the turbine speed is uploaded to the monitoring device and flashed as a reminder. When the turbine speed increases to 3360 rpm, the monitoring device will issue an audible and visual alarm and then immediately shut down the turbine.

[0009] Step S3: The user operates the control panel, which can close the speed regulating valve and keep it closed, and then open the main valve;

[0010] Step S4: The speed regulating valve can only be opened when the user checks on the monitoring device that the speed has dropped below 1000 rpm;

[0011] Step S5: Next, the speed of the steam turbine is increased back to 3000 rpm to test multiple sets of speed regulating valves;

[0012] Step S6: If the experiment is conducted under rated parameters, the speed regulating valve is considered qualified if the final stable turbine speed is below 1000 rpm.

[0013] An experimental apparatus for detecting leakage in a steam turbine speed regulating valve includes:

[0014] The system includes a control panel, a monitoring device, and a steam turbine. The steam turbine includes a speed regulating valve and a main valve. The control panel is used to operate the overall experimental operation. The control panel is connected to the monitoring device and is used to feed back the speed of the steam turbine during the experiment to the monitoring device.

[0015] The monitoring device includes: a housing, a pointer, a tachometer, and a processing device. The processing device is installed inside the housing and is connected to the control board via a wire. The processing device can control the rotating part of the motor to rotate.

[0016] It also includes: a drive mechanism, a transmission mechanism, alarm component one, and alarm component two. Through the operation of the drive mechanism, and under the action of the transmission mechanism, alarm component one flashes an alarm, and alarm component two rings an alarm. Furthermore, the operation changes accordingly with increasing rotational speed.

[0017] Optionally, the drive mechanism includes:

[0018] A rotating rod is provided, one end of which is fixedly connected to the rotating part of the first motor. A fixing plate is fixedly connected to the outer shell of the first motor. The side of the fixing plate is fixedly connected to the inner wall of the shell. The end of the rotating rod protrudes from the outer surface of the shell and is fixedly connected to the outer surface of the pointer. An opening is provided on the side of the fixing plate. A connecting rod is rotatably connected to the opening wall of the opening. A pulley is rotatably connected to the outer surface of the rotating rod. A second pulley is rotatably connected to the outer surface of the connecting rod. The second pulley and the first pulley are connected by a belt drive.

[0019] Optionally, the speed change mechanism includes:

[0020] An L-shaped component has an opening on its side for the connecting rod to pass through and be rotatably connected to it. The side of the L-shaped component is fixedly connected to the side of the second pulley. A rotating rod is rotatably connected to the side of the L-shaped component. Friction disc one and friction disc two are fixedly connected to the two ends of the rotating rod, respectively. Friction disc three is fixedly connected to the outer surface of the connecting rod. Friction disc two and friction disc three are driven by friction. A motor two is fixedly connected to the inner wall of the housing. A conical friction wheel is fixedly connected to the rotating part of the motor two. The conical friction wheel is driven by friction with friction disc one.

[0021] Optionally, the alarm component one includes:

[0022] A reciprocating screw is provided, with one end of the reciprocating screw fixedly connected to one end of the connecting rod. A reciprocating sleeve is threadedly connected to the threaded portion of the reciprocating screw. A limiting rod is fixedly connected to the outer surface of the reciprocating sleeve, and the end of the limiting rod slides against the inner wall of the housing. A protrusion is fixedly connected to the end of the reciprocating sleeve. A push switch is fixedly installed on the inner wall of the housing. When the push switch is pressed, it can transmit a signal to the processing device, which then operates an indicator light to flash as an alarm. The indicator light is fixedly installed on the upper surface of the housing.

[0023] Optionally, the second alarm component includes:

[0024] The turntable has its center connected to the other end of the connecting rod via a one-way bearing. A pull rope is fixedly connected to the side of the turntable, and a striking ball is fixedly connected to the end of the pull rope. A bell is fixedly connected to the outer surface of the fixed plate, and a stabilizing component is also included.

[0025] Optionally, the stabilizing component includes:

[0026] The magnetic ring has an annular groove at the bottom of the turntable, the groove wall is made of metal, the magnetic ring is embedded in the annular groove, and a connector is fixedly connected to the outer surface of the magnetic ring. The end of the connector is fixedly connected to the outer surface of the fixing plate.

[0027] Optionally, both the outer surfaces of the housing and the fixing plate are provided with openings, and a wiping component is fixedly connected to the opening wall of the opening.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] I. This invention, through the operation of the drive mechanism, causes the transmission mechanism to first rotate forward and then reverse, and the overall speed increases together with the turbine speed. This method has the following advantages:

[0030] As the turbine rotates forward, the speed gradually increases. Therefore, when the signal is transmitted to the two subsequent alarm components, the flashing speed of the first alarm component increases. This corresponds to the normal increase in turbine speed. As the speed increases, the flashing speed increases, which can better alert the user.

[0031] During the reversal, an audible alarm is activated. This occurs when the turbine speed exceeds a predetermined value, alerting the operator to react promptly and take appropriate action to prevent accidents caused by human negligence. The alarm component also increases in volume as the turbine speed increases, providing timely warnings and reminders to the operator, while also indicating the current safety status through the volume of the sound.

[0032] Second, this invention uses the forward rotation of the speed change mechanism to cause the alarm component to flash. This method has the following advantages: the indicator light has a flashing effect, which provides a better indication when flashing, allowing the user to promptly perceive the turbine's operating speed. Moreover, this flashing indication method is more likely to attract the user's attention, making it less likely for the user to be inattentive or negligent. It encourages the user to carefully observe the real-time changes in the speed, which helps to ensure the accuracy of this speed regulating valve leakage experiment.

[0033] Third, this invention uses the reverse rotation of the speed change mechanism to trigger the alarm component two to sound an alarm. This method enables the user to pay attention in a timely manner through this audible alarm, so as to avoid the impact on the overall turbine and experimental data when the speed exceeds a certain range, and to reduce the safety of the operator. This method uses an audible alarm so that the operator is alerted when the warning speed is about to be reached, thereby improving safety and also improving the safety performance of this leakage experiment.

[0034] Fourth, this invention, through the unique addition of this intelligent alert and alarm method during the turbine valve leakage experiment, significantly improves the safety and accuracy of the experiment, thereby avoiding safety accidents and impacts on experimental data caused by human negligence. Attached Figure Description

[0035] Figure 1 This is a front view of the structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of the monitoring device of the present invention;

[0037] Figure 3 This is a schematic diagram of the bell structure of the present invention;

[0038] Figure 4This is an isometric view of one structure of the motor of the present invention;

[0039] Figure 5 This is a schematic diagram of one structure of the friction disc of the present invention;

[0040] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point A in the middle;

[0041] Figure 7 This is a flowchart of the experimental method for detecting leakage in the turbine speed regulating valve of the present invention.

[0042] In the diagram: 1. Control panel; 2. Monitoring device; 3. Steam turbine; 4. Speed ​​regulating valve; 5. Main valve; 6. Housing; 7. Pointer; 8. Processing equipment; 9. Motor 1; 10. Rotating rod; 11. Fixing plate; 12. Speed ​​indicator; 13. Belt pulley 1; 14. Connecting rod; 15. Belt pulley 2; 16. L-shaped part; 17. Rotating rod; 18. Friction disc 1; 19. Friction disc 2; 20. Friction disc 3; 22. Conical friction wheel; 23. Reciprocating screw; 24. Reciprocating screw sleeve; 25. Limiting rod; 26. Protrusion; 27. Push switch; 28. Indicator light; 29. ​​Turntable; 30. One-way bearing; 31. Pull rope; 32. Striking ball; 33. Bell; 34. Magnetic ring; 35. Connecting part; 36. Wiping part. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example 1:

[0045] Please see Figures 1 to 7 This embodiment provides a technical solution: an experimental device for leaking a turbine speed regulating valve, comprising: a control board 1, a monitoring device 2, a turbine 3, a speed regulating valve 4 and a main valve 5. The monitoring device 2 comprises: a housing 6, a pointer 7, a processing device 8, a drive mechanism and a speed change mechanism.

[0046] More specifically, in this embodiment: In actual use, the operator closes the corresponding speed regulating valve 4 via the control panel 1 and then opens the corresponding main valve 5. The leakage of the corresponding speed regulating valve 4 is tested by the decrease in the turbine speed 3. Similarly, if the main valve 5 is to be tested for airtightness, the corresponding speed regulating valve 4 can be closed. When the turbine speed 3 increases, the monitoring device 2 can transmit its speed data to the monitoring device 2 via the control panel 1, so that multiple users can observe the change in the turbine speed 3. The rotation of the pointer 7 allows users to have a concrete understanding of the actual turbine speed 3. Therefore, the corresponding drive mechanism can be operated to operate. The drive mechanism can drive the transmission mechanism to operate, so that the speed of the transmission mechanism increases with the increase in the turbine speed 3. At the same time, when the turbine speed 3 exceeds the safe range, the transmission mechanism can reverse to achieve the effect of step-by-step drive.

[0047] It is worth noting that this embodiment also includes: alarm component one and alarm component two.

[0048] More specifically, in this embodiment: the speed change mechanism drives alarm component one to operate, causing alarm component one to emit flashing warning light to prove that the steam turbine 3 is operating normally. As the speed of steam turbine 3 increases, the flashing frequency also gradually increases, thus allowing the user to pay attention to the operation of steam turbine 3. At the same time, when the speed exceeds 3000 rpm and 3360 rpm, alarm component two intervenes in time and rings the alarm in advance, so that the user can take corresponding actions in time to ensure the safety and effectiveness of the experiment. When the speed of steam turbine 3 gets faster and faster, the sound of the alarm also gets louder, so as to achieve the purpose of timely reminder.

[0049] Example 2:

[0050] Based on the above embodiments:

[0051] Please see Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The driving mechanism in Embodiment 1 is disclosed as follows: The driving mechanism includes:

[0052] A rotating rod 10 is fixedly connected at one end to the rotating part of a motor 9. A fixing plate 11 is fixedly connected to the outer shell of the motor 9. The side of the fixing plate 11 is fixedly connected to the inner wall of the housing 6. The end of the rotating rod 10 protrudes from the outer surface of the housing 6 and is fixedly connected to the outer surface of the pointer 7. An opening 1 is provided on the side of the fixing plate 11. A connecting rod 14 is rotatably connected to the opening wall of the opening 1. A pulley 13 is rotatably connected to the outer surface of the rotating rod 10. A pulley 2 15 is rotatably connected to the outer surface of the connecting rod 14. The pulley 2 15 and the pulley 13 are connected by belt drive.

[0053] More specifically, in this embodiment: when the speed of the steam turbine 3 begins to increase, the leakage test of the corresponding speed regulating valve has begun, so the processing equipment 8 will operate the motor 9 to rotate. As the motor 9 rotates, it can drive the rotating rod 10 to rotate, and due to the belt drive, the pulley 13 and the pulley 15 can rotate.

[0054] It is worth noting that in this embodiment, both the outer surfaces of the housing 6 and the fixing plate 11 are provided with openings, and a wiping member 36 is fixedly connected to the opening wall of the opening.

[0055] More specifically, in this embodiment: with the wiping member 36, the surface of the conical friction wheel 22 can be wiped evenly to avoid the dust adhering to it affecting the power transmission of the conical friction wheel 22 after long-term use.

[0056] Example 3:

[0057] Based on the above embodiments:

[0058] Please see Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The transmission mechanism in Embodiment 1 is disclosed as follows: The transmission mechanism includes:

[0059] L-shaped part 16 has an opening on its side for the connecting rod 14 to pass through and be rotatably connected to it. The side of L-shaped part 16 is fixedly connected to the side of pulley 15. A rotating rod 17 is rotatably connected to the side of L-shaped part 16. Friction disc 18 and friction disc 19 are fixedly connected to the two ends of the rotating rod 17, respectively. Friction disc 20 is fixedly connected to the outer surface of the connecting rod 14. Friction disc 29 and friction disc 20 are driven by friction. Motor 2 is fixedly connected to the inner wall of housing 6. A conical friction wheel 22 is fixedly connected to the rotating part of motor 2. The conical friction wheel 22 is driven by friction with friction disc 18.

[0060] More specifically, in this embodiment: the rotation of motor two drives the conical friction wheel 22 to rotate, and the rotation of pulley two 15 drives the L-shaped component 16 to rotate. This causes the L-shaped component 16, friction disc three 20, friction disc two 19, rotating rod 17, and friction disc one 18 to revolve around the connecting rod 14. This allows friction disc one 18 to slide on the conical friction wheel 22. Based on the principle of different gear ratios, under the premise that the rotational speed of the conical friction wheel 22 is stable, the rotational speed of friction disc one 18 continuously increases. When friction disc one 18 revolves to a certain angle, the contact point between friction disc one 18 and the conical friction wheel 22, which was originally on the lower side, ... Figure 4 As shown, with the revolution of friction disc 18, the upper side of friction disc 18 eventually rubs against the conical friction wheel 22, causing friction disc 18 to reverse. Therefore, through the connecting transmission, connecting rod 14 can have the effect of first rotating forward and then reverse, with the rotation speed gradually increasing during forward rotation. Thus, when this transmission reaches the two subsequent alarm components, alarm component 1 flashes its light faster and faster. This corresponds to the normal increase in turbine speed. As the speed increases, the flashing warning light flashes faster, thus attracting the user's attention. Simultaneously, the turbine 3's speed is increasing normally. Alarm component 2 does not operate or emit sound when connecting rod 14 rotates forward, but begins to emit an audible alarm when connecting rod 14 reverses, corresponding to the turbine 3's speed exceeding 3... When the speed reaches 3000 rpm or is about to exceed 3000 rpm, an audible alarm will be emitted to alert the operator, allowing for timely response and appropriate action to prevent accidents caused by human negligence. The alarm component 2 emits a louder sound as the speed increases, thanks to the higher the turbine 3's speed and the faster the connecting rod 14 reverses, resulting in a higher striking frequency and louder sound. This provides timely warnings and reminders to the operator, while also indicating the current safety status through sound volume. This mechanized speed control method differs from sensor-based alarm methods. Sensor-based and other electronic control methods may fail to alarm due to usage and external factors, while this method utilizes tight mechanical transmission, thus offering superior safety.

[0061] Example 4:

[0062] Based on the above embodiments:

[0063] Please see Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The alarm component one in Embodiment 1 is disclosed as follows: Alarm component one includes:

[0064] A reciprocating screw 23 is fixedly connected to one end of a connecting rod 14. A reciprocating sleeve 24 is threadedly connected to the threaded part of the reciprocating screw 23. A limiting rod 25 is fixedly connected to the outer surface of the reciprocating sleeve 24. The end of the limiting rod 25 slides against the inner wall of the housing 6. A protrusion 26 is fixedly connected to the end of the reciprocating sleeve 24. A push switch 27 is fixedly installed on the inner wall of the housing 6. When the push switch 27 is pressed, it can transmit a signal to the processing device 8. The processing device 8 operates the indicator light 28 to flash alarm. The indicator light 28 is fixedly installed on the upper surface of the housing 6.

[0065] More specifically, in this embodiment: the rotation of the connecting rod 14 drives the reciprocating screw 23 to rotate, and then, under the sliding restriction relationship of the threaded transmission and the limiting rod 25, the reciprocating sleeve 24 moves back and forth, thereby causing the protrusion 26 on the reciprocating sleeve 24 to continuously contact the push switch 27. When the push switch 27 is pressed, the processing device 8 will promptly illuminate the indicator light 28, causing the indicator light to light up. When the two are no longer in contact, the indicator light 28 goes out, and so on. The indicator light 28 has a flashing effect, which provides a better indication when flashing, allowing the user to promptly perceive the operating speed of the turbine 3. This flashing indication method is more likely to attract the user's attention, making it less likely for the user to be inattentive or negligent, and encouraging the user to carefully observe the real-time changes in the speed, which helps to ensure the accuracy of the leakage test of the speed regulating valve 4.

[0066] Example 5:

[0067] Based on the above embodiments:

[0068] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 The alarm component two in Embodiment 1 is disclosed as follows: Alarm component two includes:

[0069] Turntable 29, the center of turntable 29 is connected to the other end of connecting rod 14 via one-way bearing 30, pull rope 31 is fixedly connected to the side of turntable 29, and striking ball 32 is fixedly connected to the end of pull rope 31. Bell 33 is fixedly connected to the outer surface of fixed plate 11.

[0070] More specifically, in this embodiment: when the connecting rod 14 rotates forward, the turntable 29 will not rotate due to the unidirectional transmission of the one-way bearing 30. When the connecting rod 14 rotates in reverse, the turntable 29 rotates, driving the pull rope 31 and the striking ball 32 to rotate synchronously. Under centrifugal force, the pull rope 31 pulls the striking ball 32 taut, causing the striking ball 32 to continuously strike the bell 33, making the bell 33 sound to alert the user that the turbine 3 speed is about to exceed 3000 rpm, thus raising the user's awareness. This audible alarm allows the user to pay attention in time to avoid damage to the entire turbine 3 and reduced operator safety when the speed exceeds a certain range. The alarm component 2 only sounds when the leakage is within the specified range, achieving timely alarm and raising awareness. Since the speed of the turbine 3 determines the leakage state of the speed regulating valve 4 during leakage, observing the speed is crucial. Furthermore, if the turbine is not stopped promptly when the speed reaches 3360 rpm, personnel safety may be compromised. Manual observation of the speed is susceptible to accidental and negligent actions, potentially leading to accidents due to the operator not noticing excessively high speeds. Therefore, this method employs an audible alarm to alert the operator when the warning speed is approaching, improving safety and enhancing the safety performance of this leakage experiment.

[0071] It is worth noting that in this embodiment: the bottom of the turntable 29 is provided with an annular groove, the groove wall is made of metal, the magnetic ring 34 is embedded in the annular groove, and a connector 35 is fixedly connected to the outer surface of the magnetic ring 34. The end of the connector 35 is fixedly connected to the outer surface of the fixing plate 11.

[0072] More specifically, in this embodiment: the magnetic attraction between the magnetic ring 34 and the bottom of the turntable 29 stabilizes the turntable 29. Even with a one-way bearing 30, the turntable 29 may still suddenly deflect when the connecting rod 14 rotates forward. Therefore, this method improves the stability between the two through the magnetic attraction. Furthermore, when the connecting rod 14 rotates in reverse, the embedded magnetic ring 34 does not restrict the normal rotation of the turntable 29, thus preventing the turbine 3 from ringing an alarm at normal speed.

[0073] An experimental method for detecting leakage in a steam turbine speed regulating valve includes the following steps:

[0074] 1. The user sets the steam parameters on the control panel 1, stabilizes the speed of the steam turbine 3 at 3000 rpm, then checks the working status of the high-pressure oil pump and conducts a trial run.

[0075] Second: The real-time speed data of turbine 3 is uploaded to monitoring device 2 and flashed as a reminder. When the speed of turbine 3 rises to 3360 rpm, monitoring device 2 will issue an audible and visual alarm and then immediately shut down the machine.

[0076] 3. The user operates on the control panel 1. The control panel can close the speed regulating valve 4 and keep it closed, and then open the main valve 5.

[0077] 4. The user can open the speed regulating valve 4 only when the speed drops below 1000 rpm as checked on the monitoring device 2.

[0078] Fifth: Next, the speed of turbine 3 was increased back to 3000 rpm to test multiple sets of speed regulating valves 4;

[0079] 6. If the experiment is conducted under rated parameters, the speed regulating valve 4 is considered qualified if the final stable turbine speed is below 1000 rpm.

[0080] Where: Maximum stable speed = 1000 r / min × (test air pressure / rated air pressure).

[0081] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test method for leakage of a steam turbine speed regulating valve, characterized in that: The test method based on an experimental apparatus for leaking a turbine speed regulating valve specifically includes the following steps: Step S1: The user sets the steam parameters on the control panel (1), stabilizes the speed of the steam turbine (3) at 3000 rpm, then checks the working status of the high-pressure oil pump and performs a trial run; Step S2: The real-time data of the rotational speed of the steam turbine (3) is uploaded to the monitoring device (2) and flashed as a reminder. When the rotational speed of the steam turbine (3) increases to 3360 rpm, the monitoring device (2) will issue an audible and visual alarm and then immediately shut down the machine. Step S3: The user operates on the control panel (1). The control panel can close the speed regulating valve (4) and keep it closed, and then open the main valve (5). Step S4: The user can open the speed regulating valve (4) only when the speed drops below 1000 rpm on the monitoring device (2). Step S5: Next, the speed of the steam turbine (3) is increased back to 3000 rpm to test multiple sets of speed regulating valves (4); Step S6: If the experiment is conducted under rated parameters, the speed regulating valve (4) is qualified when the final stable turbine speed is below 1000 rpm. An experimental apparatus for detecting leakage in a steam turbine speed regulating valve includes: The control board (1), the monitoring device (2) and the steam turbine (3) are provided. The steam turbine (3) includes a speed regulating valve (4) and a main valve (5). The control board (1) is used to operate the overall experimental operation. The control board (1) is connected to the monitoring device (2) and is used to feed back the speed of the steam turbine (3) in the experiment to the monitoring device (2). The monitoring device (2) includes: a housing (6), a pointer (7), a speed indicator (12), and a processing device (8). The processing device (8) is installed inside the housing (6). The processing device (8) is connected to the control board (1) via a wire. The processing device (8) can operate the rotating part of the motor (9) to rotate. It also includes: a drive mechanism, a speed change mechanism, alarm component one and alarm component two. Through the operation of the drive mechanism, under the action of the speed change mechanism, the alarm component one is driven to flash an alarm, and the alarm component two is driven to ring an alarm. The alarm components can also change accordingly as the rotation speed increases. The speed-changing mechanism includes: L-shaped part (16), the side of the L-shaped part (16) is provided with an opening two for the connecting rod (14) to pass through and to be rotatably connected to it on a fixed axis, the side of the L-shaped part (16) is fixedly connected to the side of the pulley two (15), the side of the L-shaped part (16) is rotatably connected to a rotating rod (17), the two ends of the rotating rod (17) are respectively fixedly connected to a friction disc one (18) and a friction disc two (19), the outer surface of the connecting rod (14) is fixedly connected to a friction disc three (20), the friction disc two (19) and the friction disc three (20) are rubbed and driven by each other, the inner wall of the housing (6) is fixedly connected to a motor two, the rotating part of the motor two is fixedly connected to a conical friction wheel (22), the conical friction wheel (22) and the friction disc one (18) are rubbed and driven by each other.

2. The experimental method for detecting leakage in a steam turbine speed regulating valve according to claim 1, characterized in that: The drive mechanism includes: A rotating rod (10) is fixedly connected at one end to the rotating part of the motor (9). A fixing plate (11) is fixedly connected to the outer shell of the motor (9). The side of the fixing plate (11) is fixedly connected to the inner wall of the shell (6). The end of the rotating rod (10) passes through the outer surface of the shell (6) and is fixedly connected to the outer surface of the pointer (7). An opening is provided on the side of the fixing plate (11). A connecting rod (14) is rotatably connected to the opening wall of the opening. A pulley (13) is rotatably connected to the outer surface of the rotating rod (10). A pulley (15) is rotatably connected to the outer surface of the connecting rod (14). The pulley (15) is connected to the pulley (13) by belt drive.

3. The experimental method for detecting leakage in a steam turbine speed regulating valve according to claim 2, characterized in that: The alarm component includes: A reciprocating screw (23) is fixedly connected to one end of a connecting rod (14). A reciprocating sleeve (24) is threadedly connected to the threaded part of the reciprocating screw (23). A limiting rod (25) is fixedly connected to the outer surface of the reciprocating sleeve (24). The end of the limiting rod (25) slides against the inner wall of the housing (6). A protrusion (26) is fixedly connected to the end of the reciprocating sleeve (24). A push switch (27) is fixedly installed on the inner wall of the housing (6). When the push switch (27) is pressed, it can transmit a signal to the processing device (8). The processing device (8) operates the indicator light (28) to flash alarm. The indicator light (28) is fixedly installed on the upper surface of the housing (6).

4. The experimental method for detecting leakage in a steam turbine speed regulating valve according to claim 3, characterized in that: The second alarm component includes: The turntable (29) is connected to the other end of the connecting rod (14) via a one-way bearing (30) at its center. A pull rope (31) is fixedly connected to the side of the turntable (29). A striking ball (32) is fixedly connected to the end of the pull rope (31). A bell (33) is fixedly connected to the outer surface of the fixing plate (11). The turntable (29) also includes a stabilizing component.

5. The experimental method for detecting leakage in a steam turbine speed regulating valve according to claim 4, characterized in that: The stabilizing component includes: The magnetic ring (34) has an annular groove at the bottom of the turntable (29). The groove wall is made of metal. The magnetic ring (34) is embedded in the annular groove. A connector (35) is fixedly connected to the outer surface of the magnetic ring (34). The end of the connector (35) is fixedly connected to the outer surface of the fixing plate (11).

6. The experimental method for detecting leakage in a steam turbine speed regulating valve according to claim 5, characterized in that: Both the outer surfaces of the housing (6) and the fixing plate (11) are provided with openings, and a wiping component (36) is fixedly connected to the opening wall of the opening.

Images