Online monitoring device for leakage of speed regulating valve rod of steam turbine

Abstract

The invention discloses a steam turbine speed regulating valve rod leakage online monitoring device which comprises a support, one end of the support is provided with a connection fixing device, the end, away from the connection fixing device, of the support is connected with a rotation fixing device, and a temperature sensor and a vibration sensor are clamped in the rotation fixing device; the temperature sensor is connected with a wireless sending module in a serial port mode, the wireless sending module is in signal connection with a wireless gateway, and the wireless gateway is in signal connection with a background management system. The background management system comprises a processing module, an acquisition processing module, a communication processing module and a communication module. The wireless gateway comprises a detection module, an abnormity feedback module and a confirmation module. By means of the structure, the temperature of each valve rod can be monitored online in real time, and whether sealing of the valve rods is damaged or not is recognized and judged by adjusting temperature changes of the valve rods.

Description

Technical Field

[0001] The invention relates to the technical field of valve stem leakage detection, and in particular to an online monitoring device for turbine speed regulating valve stem leakage. Background Art

[0002] The turbine speed regulating valve stem is located at the upper part of the turbine air inlet chamber, where it is located at a high position and the temperature is also high, making it difficult for personnel to approach. The existing technology is to check whether the speed regulating valve stem is leaking through manual regular inspections, and to judge whether the valve stem seal is in good condition by standing at a distance and observing the situation with the eyes. This will inevitably require personnel with certain technical experience to observe and judge in order to determine the use of the valve stem seal. Moreover, once the inspection personnel are inexperienced, or the inspection is not careful, or the inspection is not carried out regularly on time to timely discover problems such as valve stem seal leakage, it will cause the valve stem to leak and not be handled in time. Over time, it will inevitably cause the steam leakage of the turbine valve stem to increase, resulting in a decrease in turbine operating efficiency and an increase in energy consumption. At the same time, if the high steam scours the valve stem and causes the valve stem to be damaged to a certain extent, it must be replaced. Once the valve stem is seriously damaged, it must be shut down for processing, which will have a certain impact on safe and stable operation. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an online monitoring device for steam turbine speed regulating valve stem leakage, which can monitor the temperature of each valve stem in real time online and identify and judge whether the valve stem seal is damaged by adjusting the change of the temperature at the valve stem.

[0004] The present invention also provides an online monitoring device for leakage of a steam turbine speed regulating valve stem as described above, comprising: a bracket, one end of the bracket is provided with a connecting and fixing device, the end of the bracket away from the connecting and fixing device is connected to a rotating fixing device, and the interior of the rotating fixing device clamps a temperature sensor and a vibration sensor; the temperature sensor is connected to a wireless sending module via a serial port, the wireless sending module signal is connected to a wireless gateway, and the wireless gateway signal is connected to a background management system; the background management system includes a processing module, an acquisition processing module, a communication processing module, and a communication module, and the wireless gateway includes a detection module, an abnormal feedback module, and a confirmation module.

[0005] According to an online monitoring device for leakage of a turbine speed regulating valve stem provided by the present invention, the connecting and fixing device includes a U-shaped clamping groove, the surface of the U-shaped clamping groove is threadedly connected with an adjusting screw, one end of the adjusting screw is rotatably connected to a pressure plate, and a locking screw is arranged inside the U-shaped clamping groove.

[0006] According to an online monitoring device for leakage of a steam turbine speed regulating valve stem provided by the present invention, the rotating fixing device includes a locking groove, a clamping plate is rotatably connected inside the locking groove, a clamping groove is provided inside the clamping plate, and the temperature sensor is located inside the clamping groove.

[0007] According to an online monitoring device for turbine speed regulating valve stem leakage provided by the present invention, the processing module is used to collect, compensate and amplify signals for linearization, and the collection and processing module is used to collect vibration signals, temperature signals and filter interference signals.

[0008] According to an online monitoring device for turbine speed regulating valve stem leakage provided by the present invention, the communication processing module is used to control the power supply and coordinate the work of the acquisition processing module and manage the background communication. The communication module is used to communicate with the gateway and establish a mesh network connection point.

[0009] According to an online monitoring device for turbine speed regulating valve stem leakage provided by the present invention, the detection module is used to store real-time detection data, and the abnormality feedback module is used to compare the data inside the detection module with normal data, and to promptly issue an alarm when an abnormality is found.

[0010] According to an online monitoring device for steam turbine speed regulating valve stem leakage provided by the present invention, the confirmation module is used to continuously collect data after an alarm is issued, and then determine again whether it is an abnormal state.

[0011] According to an online monitoring device for steam turbine speed regulating valve stem leakage provided by the present invention, there are a plurality of temperature sensors, and a gap is provided between the temperature sensor and the valve stem.

[0012] Beneficial Effects

[0013] 1. The present invention can monitor the temperature of each valve stem online in real time, and identify and judge whether the valve stem seal is damaged by adjusting the change of the temperature at the valve stem.

[0014] 2. The present invention can effectively reduce the workload of inspection workers, and at the same time avoid the problem of steam leakage caused by workers' untimely inspection or insufficient technical experience failing to timely determine the damage of valve stem seal, which affects the safe and stable operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 It is a schematic diagram of the overall structure of the online monitoring device for leakage of a steam turbine speed regulating valve stem according to the present invention;

[0017] Figure 2 The present invention is a schematic diagram of the process of the on-line monitoring device for the leakage of the steam turbine speed regulating valve stem.

[0018] Legend:

[0019] 1. Bracket; 2. Connecting and fixing device; 3. Rotating and fixing device; 4. Temperature sensor; 6. Vibration sensor; 51. Processing module; 52. Acquisition and processing module; 53. Communication processing module; 54. Communication module; 55. Detection module; 56. Abnormal feedback module; 57. Confirmation module; 21. U-shaped clamping groove; 22. Adjusting screw; 23. Pressure plate; 24. Fixing screw; 31. Fixing groove; 32. Clamping plate; 33. Clamping groove. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0021] Reference Figure 1-2 The embodiment of the present invention is an online monitoring device for leakage of a turbine speed regulating valve stem, which includes: a bracket 1, a connecting and fixing device 2 is provided at one end of the bracket 1, which is fixed to the device to determine the position of the bracket 1, and a rotating fixing device 3 is connected to the end of the bracket 1 away from the connecting and fixing device 2 to fix the positions of a temperature sensor 4 and a vibration sensor 6. The temperature sensor 4 and the vibration sensor 6 are clamped inside the rotating fixing device 3 to detect the temperature and the vibration; the temperature sensor 4 is connected to a wireless sending module via a serial port to transmit the detected information, the wireless sending module signal is connected to a wireless gateway, and the wireless gateway signal is connected to a background management system; the background management system includes a processing module 51, a collection and processing module 52, a communication processing module 53, and a communication module 54, and the wireless gateway includes a detection module 55, an abnormal feedback module 56, and a confirmation module 57.

[0022] The connecting and fixing device 2 includes a U-shaped clamping groove 21, which is connected to the device. The surface of the U-shaped clamping groove 21 is threadedly connected with an adjusting screw 22 to adjust the position of the pressure plate 23. One end of the adjusting screw 22 is rotatably connected to the pressure plate 23, and most positions can be connected. A fixing screw 24 is arranged inside the U-shaped clamping groove 21, and the fixing screw 24 intercepts the lower opening to form a stable structure.

[0023] The rotating fixing device 3 includes a locking groove 31, which forms a rotating space for the clamping plate 32. The clamping plate 32 is rotatably connected inside the locking groove 31, and the position of the locking groove 31 and the clamping plate 32 is fixed by adjusting bolts. A clamping groove 33 is provided inside the clamping plate 32 to clamp the temperature sensor 33. The temperature sensor 4 is located inside the clamping groove 33.

[0024] The processing module 51 is used to collect, compensate, amplify and linearize the signal, and the collection and processing module 52 is used to collect vibration signals, temperature signals, and filter interference signals.

[0025] The communication processing module 53 is used to control the power supply and coordinate the work of the acquisition processing module 52, and manage the background communication. The communication module 54 is used to communicate with the gateway and establish a mesh network connection point.

[0026] The detection module 55 is used to store real-time detection data, and the abnormality feedback module 56 is used to compare the data inside the detection module 55 with normal data, and to promptly issue an alarm when an abnormality is found.

[0027] The confirmation module 57 is used to continuously collect data after an alarm is issued and to determine again whether it is an abnormal state.

[0028] There are a plurality of temperature sensors 4 , and there is a gap between the temperature sensor 4 and the valve stem.

[0029] Working principle: When in use, the bracket is fixed in the corresponding position by connecting the fixing device 2, the temperature sensor 4 is inserted into it by adjusting the angle of the splint 32, and then the position is determined by locking the screw period position. The detection signal of the temperature sensor 4 and the vibration sensor 6 is transmitted to the background management system through the processing module 51, the acquisition processing module 52, the communication processing module 53, and the communication module 54. After processing, it passes through the detection module 55, the abnormal feedback module 56, and the confirmation module 57 again. After processing, the abnormal situation is handled.

[0030] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An online monitoring device for steam turbine speed regulating valve stem leakage, characterized in that: include: A bracket (1), wherein one end of the bracket (1) is provided with a connecting and fixing device (2), and one end of the bracket (1) away from the connecting and fixing device (2) is connected to a rotating fixing device (3), wherein a temperature sensor (4) and a vibration sensor (6) are clamped inside the rotating fixing device (3); The temperature sensor (4) is connected to a wireless transmission module via a serial port, the wireless transmission module signal is connected to a wireless gateway, and the wireless gateway signal is connected to a background management system; The background management system comprises a processing module (51), a collection processing module (52), a communication processing module (53), and a communication module (54); the wireless gateway comprises a detection module (55), an abnormal feedback module (56), and a confirmation module (57).

2. The on-line monitoring device for steam turbine speed regulating valve stem leakage according to claim 1, characterized in that: The connecting and fixing device (2) comprises a U-shaped clamping groove (21), the surface of the U-shaped clamping groove (21) is threadedly connected with an adjusting screw (22), one end of the adjusting screw (22) is rotatably connected with a pressure plate (23), and a locking screw (24) is arranged inside the U-shaped clamping groove (21).

3. The on-line monitoring device for steam turbine speed regulating valve stem leakage according to claim 1, characterized in that: The rotating fixing device (3) comprises a locking groove (31), the interior of the locking groove (31) is rotatably connected with a clamping plate (32), the interior of the clamping plate (32) is provided with a clamping groove (33), and the temperature sensor (4) is located inside the clamping groove (33).

4. The on-line monitoring device for steam turbine speed regulating valve stem leakage according to claim 1, characterized in that: The processing module (51) is used for collecting, compensating, and amplifying and linearizing signals, and the collection and processing module (52) is used for collecting vibration signals, temperature signals, and filtering interference signals.

5. The on-line monitoring device for steam turbine speed regulating valve stem leakage according to claim 1, characterized in that: The communication processing module (53) is used to control the power supply and coordinate the work of the acquisition processing module (52) and manage the background communication. The communication module (54) is used to communicate with the gateway and establish a mesh network connection point.

6. The on-line monitoring device for steam turbine speed regulating valve stem leakage according to claim 1, characterized in that: The detection module (55) is used to store real-time detection data, and the abnormality feedback module (56) is used to compare the data inside the detection module (55) with normal data, and to promptly issue an alarm when an abnormality is found.

7. The on-line monitoring device for steam turbine speed regulating valve stem leakage according to claim 1, characterized in that: The confirmation module (57) is used to continuously collect data after an alarm is triggered, and then determine again whether it is an abnormal state.

8. The on-line monitoring device for steam turbine speed regulating valve stem leakage according to claim 1, characterized in that: There are a plurality of temperature sensors (4), and there is a gap between the temperature sensor (4) and the valve stem.

Images