Accurate fault analysis and diagnosis mechanism based on nuclear power million unit steam turbine

Abstract

The utility model discloses a fault accurate analysis and diagnosis mechanism based on a nuclear power million unit steam turbine, which relates to the technical field of steam turbine diagnosis, and comprises a mounting rack, one end of the mounting rack is provided with a fixing mechanism, and the fixing mechanism comprises an adsorption assembly which is arranged at one end of the mounting rack and comprises a plurality of groups of cylinders which are fixedly arranged at one end of the mounting rack; a sucker is arranged at the end of the barrel in a communicating mode, a piston is slidably mounted in the barrel, a sliding shaft is fixed to the end, away from the sucker, of the piston, a fixing piece is fixedly connected to the inner wall of the barrel, the sliding shaft penetrates through the fixing piece and is slidably connected with the fixing piece, and a spring is mounted between the fixing piece and the piston. The problems that in the prior art, a turbine fault accurate analysis and diagnosis mechanism mostly adopts a stud for installation, the stud is screwed into an installation hole, then a sensor is installed on the stud, operation is tedious, and the installation position is prone to being limited are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine diagnosis, in particular to a fault accurate analysis and diagnosis mechanism based on a steam turbine of a nuclear power million-unit unit. Background Art

[0002] As a core component of nuclear power plants, steam turbines for 1,000-million-unit nuclear power units feature large capacity, high thermal parameters, and extremely stringent safety requirements. These characteristics place extremely stringent safety and stability demands on these units, as even the slightest failure can significantly impact the overall operation of the nuclear power plant. With the continuous advancement of nuclear power technology, the structures of steam turbines for 1,000-million-unit nuclear power units are becoming increasingly complex, operating in increasingly diverse environments, and facing an increasing variety of fault types. Therefore, accurate analysis and diagnosis of steam turbine faults are crucial to ensuring the long-term safe, stable, and efficient operation of nuclear power plants.

[0003] The reference patent is titled "A Rotor Dynamics Test Device" (publication number CN214793746U), which includes a support frame and, placed therein, a rotor dynamics simulation assembly comprising a speed-controllable motor, a rotating shaft connected to the motor, a gear plate fixed to the rotating shaft, and a key phase hole provided on the gear plate; and a detection assembly comprising a speed sensor and a key phase measuring component, wherein the detection end of the speed sensor faces the gear plate for detecting the rotational speed of the gear plate, and the key phase measuring component detects the position of the key phase hole for detecting the key phase of the rotating shaft. By simulating the speed increase and decrease as well as the constant speed operation of the steam turbine rotor and utilizing the integrated detection assembly to obtain various parameters, data support is provided for subsequent steam turbine fault analysis and diagnosis, thereby solving the problem of poor integration of existing rotor dynamics test equipment.

[0004] Based on the above patent, when a fault occurs in a steam turbine, diagnosis and analysis will be performed through external equipment, and the most commonly used method is to use equipment such as a vibration analyzer for detection and analysis, and connect the sensor on the vibration analyzer to the steam turbine. The current existing technology mostly uses stud installation, screwing the stud into the mounting hole, and then installing the sensor on the stud. This method is cumbersome to operate, and the installation position is easily limited. For this reason, the utility model provides a precise fault analysis and diagnosis mechanism based on the nuclear power million-unit steam turbine. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a precise fault analysis and diagnosis mechanism based on the steam turbine of a nuclear power million-unit unit, which solves the problem that the precise fault analysis and diagnosis mechanism for the steam turbine in the existing technology mostly adopts stud installation, screwing the stud into the mounting hole, and then installing the sensor on the stud. This method is cumbersome to operate and the installation position is easily limited.

[0006] To achieve the above objectives, the utility model is realized through the following technical solutions: A fault precise analysis and diagnosis mechanism based on a nuclear power million-unit steam turbine, including a mounting frame, and one end of the mounting frame is provided with a fixing mechanism, which includes:

[0007] An adsorption component, arranged at one end of the mounting frame, includes a plurality of groups of cylinders fixedly installed at one end of the mounting frame. The end of the cylinder is communicated with a suction cup, and a piston is slidably installed inside the cylinder. The piston is fixed with a sliding shaft at the end away from the suction cup. A fixing piece is fixedly connected to the inner wall of the cylinder, and the sliding shaft penetrates through the fixing piece and is slidably connected therewith. A spring is installed between the fixing piece and the piston;

[0008] A positioning component, arranged on the cylinder and used to limit the positions of the sliding shaft and the piston.

[0009] Preferably, the positioning component includes two groups of connecting rods fixedly connected to the sliding shaft, and a sliding groove for the two groups of connecting rods to cooperate and slide directionally is arranged on the outer wall of the cylinder. The ends of the two groups of connecting rods are fixedly connected with a clamping block.

[0010] Preferably, two groups of rotating shafts are rotatably installed on the outer wall of the cylinder, and a clamping rod is fixed on each of the two groups of rotating shafts. A portal rod is fixed between the clamping rods, and the clamping rod can be cooperatively clamped into a clamping groove on the clamping block.

[0011] Preferably, a vibration sensor is fixedly installed at one end of the mounting frame. A signal line is electrically connected to the vibration sensor, and the other end of the signal line is electrically connected to a vibration analyzer body.

[0012] Preferably, a handle is fixedly installed at the upper end of the vibration analyzer body, and four groups of feet are fixed at the bottom end of the vibration analyzer body.

[0013] Preferably, a magnetic sheet is fixed at one end of the cylinder, and the magnetic sheet and the front end of the suction cup are on the same vertical plane.

[0014] Beneficial effects

[0015] The utility model provides a fault precise analysis and diagnosis mechanism based on a nuclear power million-unit steam turbine. Compared with the prior art, it has the following beneficial effects:

[0016] (1). The fault precise analysis and diagnosis mechanism based on the steam turbine of a nuclear power million - unit. This mechanism realizes the fixation and support of the overall structure through the mounting frame. One end of the mounting frame is designed with a fixing mechanism for stably installing the mechanism on the steam turbine or its peripheral equipment for subsequent fault detection and analysis. The core component of the fixing mechanism is the adsorption assembly, which realizes the adsorption and fixation function through several groups of cylinders, pistons and suction cups inside them. First, the suction cup is attached to the outer wall of the steam turbine to be detected, and then the gantry rod is pulled, which drives the clamping rod to rotate. The clamping rod then disengages from the card slot on the block. The spring originally in a stretched state inside the cylinder resumes contraction, driving the piston to move away from the suction cup, creating a negative pressure inside and outside the cylinder and the suction cup. Due to the negative pressure, the suction cup firmly adheres to the equipment surface. Fixing the vibration sensor at the part of the steam turbine to be detected can quickly install and fix the sensor, which is convenient to use.

[0017] (2). The fault precise analysis and diagnosis mechanism based on the steam turbine of a nuclear power million - unit, by designing a positioning component. This component includes a connecting rod fixedly connected to a sliding shaft. The connecting rod slides directionally in the chute on the outer wall of the cylinder, and the block fixed at its end is used to cooperate with the clamping rod. The clamping rod is installed on the cylinder through a rotating shaft, and a gantry rod is fixed between the two clamping rods for easy operation. When the connecting rod drives the block to slide to the specified position, rotate the gantry rod to make the clamping rod snap into the card slot of the block, thus locking the positions of the sliding shaft and the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the three - dimensional external view schematic diagram of the present utility model;

[0019] Figure 2 is the schematic diagram of the vibration sensor installation structure of the present utility model;

[0020] Figure 3 is the schematic diagram of the fixing mechanism structure of the present utility model;

[0021] Figure 4 is the schematic diagram of the inside of the cylinder of the present utility model.

[0022] In the figure: 1 - mounting frame, 2 - fixing mechanism, 21 - adsorption assembly, 211 - cylinder, 212 - suction cup, 213 - piston, 214 - sliding shaft, 215 - fixing piece, 216 - spring, 22 - positioning component, 221 - connecting rod, 222 - block, 223 - rotating shaft, 224 - clamping rod, 225 - gantry rod, 3 - vibration sensor, 4 - signal line, 5 - vibration analyzer body, 6 - handle, 7 - support leg, 8 - magnetic sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-4 , the present invention provides a technical solution: a fault precise analysis and diagnosis mechanism based on a nuclear power million-unit steam turbine, including a mounting frame 1. One end of the mounting frame 1 is provided with a fixing mechanism 2, and the fixing mechanism 2 includes:

[0025] An adsorption assembly 21, arranged at one end of the mounting frame 1, includes a plurality of groups of cylinders 211 fixedly installed at one end of the mounting frame 1. The end of the cylinder 211 is communicated with a suction cup 212, and a piston 213 is slidably installed inside the cylinder 211. A sliding shaft 214 is fixed at the end of the piston 213 away from the suction cup 212. A fixing piece 215 is fixedly connected to the inner wall of the cylinder 211, and the sliding shaft 214 passes through the fixing piece 215 and is slidably connected thereto. A spring 216 is installed between the fixing piece 215 and the piston 213;

[0026] A positioning assembly 22, arranged on the cylinder 211 and used to limit the positions of the sliding shaft 214 and the piston 213.

[0027] In this embodiment, the positioning assembly 22 includes two groups of connecting rods 221 fixedly connected to the sliding shaft 214. A chute for the two groups of connecting rods 221 to cooperate and slide directionally is provided on the outer wall of the cylinder 211. The ends of the two groups of connecting rods 221 are fixedly connected with a clamping block 222. Two groups of rotating shafts 223 are rotatably installed on the outer wall of the cylinder 211, and a clamping rod 224 is fixed on each of the two groups of rotating shafts 223. A portal rod 225 is fixed between the clamping rods 224, and the clamping rod 224 can be clamped into the card slot on the clamping block 222. By pulling the portal rod 225, it drives the clamping rod 224 to rotate, and the clamping rod 224 is withdrawn from the card slot on the clamping block 222. The spring 216 originally in a stretched state inside the cylinder 211 resumes contraction, and then drives the piston 213 to move away from the suction cup 212.

[0028] In this embodiment, a vibration sensor 3 is fixedly installed at one end of the mounting bracket 1. A signal line 4 is electrically connected to the vibration sensor 3, and the other end of the signal line 4 is electrically connected to a vibration analyzer body 5. A handle 6 is fixedly installed at the upper end of the vibration analyzer body 5, and four sets of feet 7 are fixed at the bottom end of the vibration analyzer body 5. A magnetic sheet 8 is fixed at one end of the cylinder body 211, and the magnetic sheet 8 and the front end of the suction cup 212 are on the same vertical plane. The magnetic attraction between the magnetic sheet 8 and the surface of the device further enhances the fixing effect, especially suitable for devices with a metal surface, improving the adsorption stability and reliability. For convenient carrying and operation, a handle 6 is designed at the upper end of the vibration analyzer body 5 for the staff to carry and move by hand. Four sets of feet 7 are fixed at the bottom end of the body to ensure the stability of the body during the analysis and diagnosis process.

[0029] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0030] During operation, a vibration sensor 3 is also fixed at one end of the mounting bracket 1. The vibration sensor 3 can capture the vibration signals during the operation of the steam turbine and transmit these signals to the vibration analyzer body 5 through the signal line 4. The vibration analyzer body 5 processes and analyzes the received vibration signals to accurately diagnose the fault type and location of the steam turbine. The mechanism realizes the fixation and support of the overall structure through the mounting bracket 1. A fixing mechanism 2 is designed at one end of the mounting bracket 1 to stably mount the mechanism on the steam turbine or its surrounding equipment for subsequent fault detection and analysis. The core component of the fixing mechanism 2 is the adsorption assembly 21, which realizes the adsorption and fixation function through several cylinder bodies 211, the pistons 213 inside them, and the suction cups 212. First, the suction cup 212 is attached to the outer wall of the steam turbine to be detected, and then the portal rod 225 is pulled to drive the clamping rod 224 to rotate. The clamping rod 224 is then withdrawn from the card slot on the clamping block 222. The spring 216 originally in a stretched state inside the cylinder body 211 resumes contraction, driving the piston 213 to move away from the suction cup 212, creating a negative pressure inside and outside the cylinder body 211 and the suction cup 212. Due to the negative pressure, the suction cup 212 firmly adsorbs on the device surface, fixing the vibration sensor 3 at the part of the steam turbine to be detected. In addition, a magnetic sheet 8 is fixed at one end of the cylinder body 211, and the magnetic sheet 8 and the suction cup 212 are on the same vertical plane. This design enables the mechanism to further enhance the fixing effect through the magnetic attraction between the magnetic sheet 8 and the device surface in addition to the negative pressure adsorption during adsorption and fixation, especially suitable for devices with a metal surface, improving the adsorption stability and reliability. For convenient carrying and operation, a handle 6 is designed at the upper end of the vibration analyzer body 5 for the staff to carry and move by hand. At the same time, four sets of feet 7 are fixed at the bottom end of the body to ensure the stability of the body during the analysis and diagnosis process.

[0031] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fault precise analysis and diagnosis mechanism based on a steam turbine of a nuclear power million-unit, comprising a mounting frame (1), characterized in that: One end of the mounting frame (1) is provided with a fixing mechanism (2), and the fixing mechanism (2) comprises: The adsorption assembly (21) is arranged at one end of the mounting frame (1), and comprises a plurality of groups of cylinders (211) fixedly mounted on one end of the mounting frame (1); the ends of the cylinders (211) are mutually provided with suction cups (212); a piston (213) is slidably mounted inside the cylinders (211); a sliding shaft (214) is fixed to the end of the piston (213) away from the suction cup (212); a fixing plate (215) is fixedly connected to the inner wall of the cylinder (211); the sliding shaft (214) passes through the fixing plate (215) and is slidably connected thereto; a spring (216) is installed between the fixing plate (215) and the piston (213); The positioning assembly (22) is arranged on the cylinder (211) and is used to limit the positions of the sliding shaft (214) and the piston (213).

2. The fault precise analysis and diagnosis mechanism based on the steam turbine of a nuclear power million-kilowatt unit according to claim 1, wherein: The positioning assembly (22) comprises two groups of connecting rods (221) fixedly connected to the sliding shaft (214), and the outer wall of the cylinder (211) is provided with a sliding groove for the two groups of connecting rods (221) to cooperate with each other in directional sliding, and the ends of the two groups of connecting rods (221) are fixedly connected with a clamping block (222).

3. The fault precise analysis and diagnosis mechanism based on the steam turbine of a nuclear power million-kilowatt unit according to claim 1, characterized in that: Two groups of rotating shafts (223) are rotatably mounted on the outer wall of the cylinder (211), and clamping rods (224) are fixed on both groups of rotating shafts (223). A door-shaped rod (225) is fixed between the clamping rods (224), and the clamping rods (224) can be fitted into the clamping slots on the clamping blocks (222).

4. The precise fault analysis and diagnosis mechanism for nuclear power 1000-million-unit steam turbines according to claim 1 is characterized in that: A vibration sensor (3) is fixedly mounted on one end of the mounting frame (1); a signal line (4) is electrically connected to the vibration sensor (3); and the other end of the signal line (4) is electrically connected to a vibration analyzer body (5).

5. The fault precise analysis and diagnosis mechanism based on the steam turbine of a nuclear power million-kilowatt unit according to claim 4, characterized in that: A handle (6) is fixedly mounted on the upper end of the vibration analyzer body (5), and four groups of supporting legs (7) are fixed on the bottom end of the vibration analyzer body (5).

6. The fault precise analysis and diagnosis mechanism based on the steam turbine of a nuclear power million-kilowatt unit according to claim 1, characterized in that: A magnetic attraction piece (8) is fixed to one end of the cylinder (211), and the magnetic attraction piece (8) and the front end of the suction cup (212) are maintained on the same vertical plane.

Images