Thermal power plant sensor fault diagnosis device and diagnosis method

Abstract

The invention relates to the technical field of sensor fault diagnosis, in particular to a thermal power plant sensor fault diagnosis device and a thermal power plant sensor fault diagnosis method, by arranging a positioning assembly, measuring plates on two sides can be uniformly stressed before a sensor is diagnosed, so that the problem of inaccurate diagnosis results caused by deviation and inclination of the sensor is avoided, and the diagnosis accuracy is improved. The influence of external force on the diagnosis result is reduced, so that the accuracy of the diagnosis result is improved; when the inclination condition of the sensor needs to be diagnosed, the lifting assembly drives the limiting block to rotate through the connecting block, the lifting toothed plate, the rotating gear and the rotating rod, limiting on the measuring ball is stopped, the measuring ball moves along the horizontal sliding groove under the action of gravity, and therefore the inclination condition of the sensor is diagnosed; the diagnosis device is more comprehensive, and the diagnosis effect on the sensor is more effective, so that the safety risk of a thermal power plant is reduced, and the working and production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sensor fault diagnosis, in particular to a sensor fault diagnosis device and a diagnosis method for a thermal power plant. Background Art

[0002] Sensors are an indispensable part of the thermal control system of a thermal power plant. They provide real-time data to ensure the safe, stable and efficient operation of the power plant and to improve the accuracy and reliability of measurements. However, in the high temperature and high pressure environment of a thermal power plant, sensors are prone to deformation, which leads to a decrease in measurement accuracy and affects the internal sealing performance of the sensor, which in turn affects signal transmission and processing. Therefore, staff are required to periodically diagnose the sensors through sensor fault diagnosis devices.

[0003] When measuring a sensor, the existing sensor fault diagnosis device places a measuring plate against the peripheral side of the sensor to be diagnosed and adjusts the heater at the same time. At this time, the sensor begins to expand due to the thermal expansion and contraction effect, thereby driving the measuring plate to move. The staff diagnoses the thermal expansion of the sensor by measuring the moving distance of the measuring plate to determine whether the thermal expansion coefficient of the sensor affects normal operation.

[0004] Although the thermal expansion coefficient of the sensor can be diagnosed more accurately through the measuring plate, it is difficult to make the sensor located at the center of the diagnostic device body when the measuring plate is abutted against both sides of the sensor, resulting in uneven force on the measuring plates on both sides of the sensor. In addition, the sensor is prone to deflection and tilt after long-term use, making it difficult for the measuring plate to remain horizontal, causing the measuring plate to move a long distance when moving, thereby causing the problem of inaccurate diagnostic results. Summary of the invention

[0005] In view of the above problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the first purpose of the present invention is to provide a thermal power plant sensor fault diagnosis device to solve the problem that the sensor is prone to deflection and tilt after long-term use, causing the measuring board to move a long distance when moving, thereby causing inaccurate diagnostic results.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a thermal power plant sensor fault diagnosis device, comprising: a main board; a first detection component, comprising a measuring board arranged at the bottom end of the main board, wherein two measuring boards are symmetrically arranged, the top ends of the measuring boards both pass through the main board and extend to the top end of the main board, and one end of the measuring board extending to the top end of the main board is fixedly installed with a measuring block, auxiliary components are arranged on both sides of the measuring block, and a heater is arranged on one side of the measuring board, and the heater is fixedly installed on the bottom end of the main board; a positioning component, comprising a driving plate arranged on one side of the measuring board, the driving plates are all slidably installed on the inner wall of the driving slide, the driving slide is opened on one side of the measuring board, the inner wall of the driving plate is threadedly installed with a bidirectional screw, one end of the bidirectional screw is fixedly installed with a first rotating handle, and the other end of the bidirectional screw is provided with a separation component.

[0008] As a preferred scheme of the sensor fault diagnosis device of a thermal power plant described in the present invention, wherein: the separation component includes a driving block arranged at one end of a bidirectional screw rod, a second turning handle is slidably installed on the outer wall of the driving block, a lifting component is arranged on the outer wall of the second turning handle, a pushing rod is fixedly installed on one end of the second turning handle, a pushing block is fixedly installed on the outer wall of the pushing rod, a double-sided arc block and a single-sided arc block are arranged on one side of the pushing block, a driving groove is opened at one end of the single-sided arc block, the double-sided arc block is slidably installed on the outer wall of the pushing rod, the single-sided arc block is fixedly installed on the outer wall of the pushing rod, the top ends of the double-sided arc block and the single-sided arc block are abutted with an abutment block, a telescopic rod is installed on the top end of the abutment block, the top end of the telescopic rod is fixedly installed on the inner wall of the driving block, and the outer wall of the telescopic rod is wrapped with a first spring.

[0009] As a preferred solution of the thermal power plant sensor fault diagnosis device described in the present invention, the lifting assembly includes a driving arc block arranged on the outer wall of the second rotating handle, a lifting block is abutted on one side of the second rotating handle, a lifting plate is fixedly installed on the top of the lifting block, a connecting block is fixedly installed on the top of the lifting plate, and a second detection assembly is arranged at one end of the connecting block.

[0010] As a preferred solution of the thermal power plant sensor fault diagnosis device described in the present invention, the second detection component includes a lifting tooth plate arranged at one end of the connecting block, both ends of the lifting tooth plate are meshed with changing gears, one side of the changing gear is meshed with a rotating gear, one side of the rotating gear is fixedly installed with a rotating rod, the bottom end of the rotating rod is fixedly installed with a limit block, a measuring ball is arranged between the limit blocks, the measuring ball is slidably installed on the inner wall of the horizontal slide groove, and the horizontal slide groove is fixedly installed on the top of the main board.

[0011] As a preferred solution of the thermal power plant sensor fault diagnosis device described in the present invention, the auxiliary component includes a first tilting block arranged on both sides of the measuring block, one side of the first tilting block is abutted against a second tilting block, and the second tilting block is fixedly installed with a rotating plate at one end away from the first tilting block, and the rotating plates are rotatably installed on the top of the main board, and second springs are arranged on both sides of the rotating plate, and the second spring is installed on one side of the fixed block at one end away from the rotating plate, and the fixed blocks are fixedly installed on the top of the main board.

[0012] As a preferred solution of the thermal power plant sensor fault diagnosis device described in the present invention, guide rods are symmetrically fixedly installed at the bottom ends of both ends of the lifting plate, the bottom ends of the guide rods pass through the main board and extend to the bottom end of the main board, the outer walls of the guide rods are wrapped with a third spring, and the lifting plate and the main board are connected through the third spring.

[0013] As a preferred solution of the thermal power plant sensor fault diagnosis device described in the present invention, wherein: the end of the driving arc block away from the second handle is set as a lifting part and a fixing part, the curvature of one side of the lifting part is greater than the curvature of the arc groove at the bottom end of the lifting block, and the curvature of one side of the fixing part is equal to the curvature of the arc groove at the bottom end of the lifting block.

[0014] As a preferred solution of the thermal power plant sensor fault diagnosis device of the present invention, the bottom end of the measuring ball is abutted against a block, and the block is fixedly installed on the top end of the horizontal slide groove.

[0015] As a preferred solution of the thermal power plant sensor fault diagnosis device of the present invention, the auxiliary components are staggeredly installed on both sides of the measuring block.

[0016] Another object of the present invention is to provide a method for diagnosing sensor faults in a thermal power plant, which is characterized by: placing a main board on the top of the sensor to be diagnosed, so that the sensor to be diagnosed is placed between the measuring plates; rotating the first handle until the two measuring plates abut against the two sides of the sensor to be diagnosed; pushing the second handle so that the first spring releases its elastic potential energy, undergoes elastic deformation, and pushes the abutment block to move into the drive groove; rotating the second handle, the staff observes the movement of the measuring ball and makes a diagnosis of the sensor tilt; starting the heater, heating the sensor to be diagnosed at different temperatures through the heater, and observing and recording the moving distance of the measuring block, so as to make a diagnosis of the thermal expansion of the sensor; after completing the diagnosis, the staff removes the main board from the sensor, and resets the separation component, the lifting component, and the second detection component.

[0017] The beneficial effects of the present invention are as follows: by setting a positioning component, before diagnosing the sensor, the staff can rotate the first rotating handle so that the first rotating handle drives the measuring plate to move toward the sensor through the bidirectional screw rod and the driving plate until both measuring plates abut against both sides of the sensor to be diagnosed, so that the measuring plates on both sides of the sensor are evenly stressed, thereby avoiding the problem of inaccurate diagnosis results caused by deviation and tilt of the sensor, reducing the influence of external force on the diagnosis results, and thus improving the accuracy of the diagnosis results;

[0018] When it is necessary to diagnose the tilt condition of the sensor, the lifting assembly drives the limit block to rotate through the connecting block, the lifting gear plate, the rotating gear and the rotating rod, stops restricting the measuring ball, and allows the measuring ball to move along the horizontal slide groove under the action of gravity, thereby diagnosing the tilt condition of the sensor, making the diagnostic device more comprehensive and the diagnostic effect of the sensor more effective, thereby reducing the safety risks of thermal power plants and improving work production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the separation component of the present invention;

[0022] Figure 3 For the present invention Figure 2 The enlarged view of point A in the middle;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the separation component of the present invention;

[0024] Figure 5 For the present invention Figure 4 The enlarged view of point B in the middle;

[0025] Figure 6 is a schematic cross-sectional structure diagram of a second measuring component of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged view of point C in the middle;

[0027] Figure 8 It is a schematic diagram of the auxiliary component structure of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0031] Example 1

[0032] Reference Figure 1 to Figure 3 , which is the first embodiment of the present invention, and provides a thermal power plant sensor fault diagnosis device, the thermal power plant sensor fault diagnosis device comprises a main board 100; the bottom end of the main board 100 is provided with a first detection component and a positioning component;

[0033] Specifically, the first detection component includes a measuring board 201 arranged at the bottom of the main board 100, two measuring boards 201 are symmetrically arranged, the tops of the measuring boards 201 all pass through the main board 100 and extend to the top of the main board 100, and one end of the measuring board 201 extending to the top of the main board 100 is fixedly installed with a measuring block 202, and auxiliary components are arranged on both sides of the measuring block 202. A heater 204 is arranged on one side of the measuring board 201, and the heater 204 is fixedly installed at the bottom of the main board 100; the positioning component includes a positioning component arranged on one side of the measuring board 201 The driving plates 301 on the two sides are all slidably installed on the inner wall of the driving groove 201a. The driving groove 201a is opened on one side of the measuring plate 201. The inner wall of the driving plate 301 is threaded with a bidirectional screw rod 302, which can make the two driving plates 301 move synchronously, thereby driving the measuring plates 201 to move the same distance, so that the measuring plates 201 on both sides of the sensor to be diagnosed are evenly stressed. One end of the bidirectional screw rod 302 is fixedly installed with a first rotating handle 302a, and the other end of the bidirectional screw rod 302 is provided with a separation component.

[0034] Specifically, the separation component includes a driving block 303a arranged at one end of the bidirectional screw rod 302, a second rotating handle 303b is slidably installed on the outer wall of the driving block 303a, a lifting component is arranged on the outer wall of the second rotating handle 303b, a pushing rod 303c is fixedly installed on one end of the second rotating handle 303b, a pushing block 303d is fixedly installed on the outer wall of the pushing rod 303c, a double-sided arc block 303e and a single-sided arc block 303f are arranged on one side of the pushing block 303d, and a driving groove is opened at one end of the single-sided arc block 303f, which can enable the second rotating handle 303b to drive the bidirectional screw rod 302 and the driving plate 301 to rotate through the pushing rod 303c, the single-sided arc block 303f, the abutment block 303g and the driving block 303a, thereby avoiding the problem that the positioning component hinders the operation of the first measuring component, and the double-sided arc Block 303e is slidably installed on the outer wall of the pushing rod 303c, and the single-sided arc block 303f is fixedly installed on the outer wall of the pushing rod 303c. The top ends of the double-sided arc block 303e and the single-sided arc block 303f are abutted with abutment block 303g, and the top end of the abutment block 303g is installed with a telescopic rod 303h. The top end of the telescopic rod 303h is fixedly installed on the inner wall of the driving block 303a, and the outer wall of the telescopic rod 303h is wrapped with a first spring 303i, which can make the abutment block 303g move toward the direction close to the telescopic rod 303h when the inclined side of the double-sided arc block 303e or the single-sided arc block 303f abuts against the abutment block 303g, and the elastic potential energy is continuously released through the first spring 303i, so that the abutment block 303g is always abutted against one side of the double-sided arc block 303e or the single-sided arc block 303f.

[0035] To summarize, by cooperating with the positioning component and the separation component, before diagnosing the sensor, the staff can rotate the first rotating handle 302a, so that the first rotating handle 302a drives the measuring plate 201 to move toward the sensor through the bidirectional screw rod 302 and the driving plate 301, until the measuring plates 201 on both sides are in contact with the two sides of the sensor to be diagnosed. At this time, the staff can push the second rotating handle 303b, so that the second rotating handle 303b can drive the bidirectional screw rod 302 and the driving plate 301 to rotate through the pushing rod 303c, the single-sided arc block 303f, the abutment block 303g and the driving block 303a, so that the driving plate 301 leaves one side of the driving slide groove 201a, and then the driving plate 301 is separated from the measuring plate 201, avoiding the problem that the positioning component hinders the operation of the first measuring component.

[0036] Example 2

[0037] Reference Figures 1 to 8 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0038] Specifically, the lifting component includes a driving arc block 304a arranged on the outer wall of the second rotating handle 303b, and the lifting block 304b is abutted on one side of the second rotating handle 303b, so that when the staff rotates the second rotating handle 303b, the second rotating handle 303b can drive the driving arc block 304a to rotate, thereby causing the driving arc block 304a to drive the lifting block 304b to lift, and a lifting plate 304c is fixedly installed on the top of the lifting block 304b, and a connecting block 304d is fixedly installed on the top of the lifting plate 304c, and one end of the connecting block 304d is provided with a second detection component for detecting whether the sensor is tilted.

[0039] Specifically, the second detection component includes a lifting tooth plate 401 arranged at one end of the connecting block 304d, and both ends of the lifting tooth plate 401 are meshed with changing gears, and one side of the changing gear is meshed with a rotating gear 403, and one side of the rotating gear 403 is fixedly installed with a rotating rod 404, and the bottom end of the rotating rod 404 is fixedly installed with a limit block 405, and a measuring ball 406 is arranged between the limit blocks 405. The limit blocks 405 can limit the movement of the measuring ball 406 before diagnosing the sensor, and when the sensor needs to be diagnosed, the rotating rod 404 drives the limit block 405 to rotate in a direction away from the measuring ball 406, stops restricting the movement of the measuring ball 406, and allows the measuring ball 406 to move under the action of gravity, thereby diagnosing the inclination degree of the sensor, and the measuring ball 406 is slidably installed on the inner wall of the horizontal slide groove 407, and the horizontal slide groove 407 is fixedly installed on the top of the main board 100.

[0040] By cooperating with the lifting component and the second detection component, when the staff rotates the second handle 303b to open the first detection component, the second handle 303b drives the limit block 405 to rotate by driving the arc block 304a, the lifting block 304b, the lifting plate 304c, the connecting block 304d, the lifting gear plate 401, the rotating gear 403 and the rotating rod 404, and stops restricting the measuring ball 406, so that the measuring ball 406 moves along the horizontal slide groove 407 under the action of gravity, thereby diagnosing the inclination condition of the sensor, avoiding the sensor from being easily deflected in the high temperature and high pressure environment of the thermal power plant, causing the inclination of the sensor to accumulate continuously, resulting in increased measurement errors and failure of the control system, thereby increasing the installation risk of the thermal power plant and reducing production efficiency. The diagnostic device is more comprehensive and the diagnostic effect on the sensor is more effective, thereby reducing the safety risk of the thermal power plant and improving work production efficiency.

[0041] Specifically, the auxiliary component includes a first tilting block 203a arranged on both sides of the measuring block 202, one side of the first tilting block 203a is abutted against a second tilting block 203b, and the second tilting blocks 203b are evenly arranged on both sides of the measuring block 202. When the sensor is diagnosed, the thermal expansion of the sensor can be diagnosed by the number of the measuring block 202 passing through the second tilting blocks 203b when it is displaced, so that the thermal expansion phenomenon of the sensor is easier to observe. The end of the second tilting block 203b away from the first tilting block 203a is fixedly installed with a rotating plate 203c, and the rotating plate 203c is rotatably installed on the top of the main board 100. Second springs 203d are arranged on both sides of the rotating plate 203c. When the sensor does not experience thermal expansion, the measuring block 202 is prevented from deflecting under the action of other external forces, which affects subsequent diagnostic observations. The end of the second spring 203d away from the rotating plate 203c is installed on one side of the fixed block 203e, and the fixed block 203e is fixedly installed on the top of the main board 100.

[0042] Specifically, guide rods 304e are symmetrically fixedly installed at the bottom ends of both ends of the lifting plate 304c, and the bottom ends of the guide rods 304e pass through the main board 100 and extend to the bottom end of the main board 100. The outer walls of the guide rods 304e are wrapped with third springs 304f. The lifting plate 304c and the main board 100 are connected by the third spring 304f, which can prevent the lifting plate 304c from tilting during movement, making the movement of the lifting plate 304c more stable. By setting the third spring 304f, when the second measuring component is reset, the movement of the lifting gear plate 401 is avoided from being hindered by the changing gear and the rotating gear 403, causing the lifting component to reset slowly or even unable to reset.

[0043] Specifically, the end of the driving arc block 304a away from the second handle 303b is set as a lifting part and a fixing part. The curvature of one side of the lifting part is greater than the curvature of the arc groove at the bottom end of the lifting block 304b. Before the staff rotates the second handle 303b, the lifting part can be blocked by the arc groove at the bottom end of the lifting block 304b to avoid the rotation of the second handle 303b, thereby affecting the operation of the separation component and the positioning component. When the staff rotates the second handle 303b, the lifting block 304b can be pushed by the lifting part, so that the lifting block 304b is lifted. The curvature of one side of the fixing part is equal to the curvature of the arc groove at the bottom end of the lifting block 304b. When the lifting part rotates to the highest point, the fixing part can fit with the arc groove at the bottom end of the lifting block 304b to fix the position of the lifting block 304b.

[0044] Specifically, the bottom end of the measuring ball 406 is abutted against a block, which is fixedly installed on the top of the horizontal slide groove 407. It can fix the initial position of the measuring ball 406 to a certain extent, avoiding the problem of over-diagnosis caused by the measuring ball 406 still moving under the action of gravity when the sensor does not need maintenance and the tilt degree is small. When resetting the second measuring component, the movement degree of the measuring ball 406 can be fixed, making the resetting of the second measuring component more convenient.

[0045] Specifically, the auxiliary components are staggeredly installed on both sides of the measuring block 202, which adds more "scales" and enables the observation of smaller changes in the thermal expansion phenomenon of the sensor, thereby further improving the accuracy of the diagnosis result.

[0046] Example 3

[0047] Reference Figures 1 to 8 , which is the third embodiment of the present invention, and provides a method for diagnosing sensor faults in a thermal power plant, and the specific steps are as follows: the first step: placing the main board on the top of the sensor to be diagnosed, so that the sensor to be diagnosed is placed between the measurement boards;

[0048] Step 2: Rotate the first rotating handle so that the first rotating handle drives the bidirectional screw rod to rotate, thereby moving the measuring plate toward the sensor to be diagnosed, until both measuring plates abut against both sides of the sensor to be diagnosed;

[0049] Step 3: Push the second rotating handle, so that the second rotating handle drives the pushing rod to move, and the pushing rod drives the single-sided arc block to move, so that the single-sided arc block abuts against the abutting block and pushes the abutting block to move away from the single-sided arc block, and the abutting block drives the telescopic rod to move and decompress the first spring, so that the first spring undergoes elastic deformation and accumulates elastic potential energy. When the driving groove opened on one side of the single-sided arc block moves to the bottom end of the abutting block, the first spring releases the elastic potential energy, undergoes elastic deformation, and pushes the abutting block to move into the driving groove;

[0050] Step 4: Rotate the second rotating handle so that the second rotating handle drives the driving plate, the bidirectional screw and the first rotating handle to rotate through the driving block 303a, so that the driving plate no longer hinders the movement of the measuring plate. At the same time, the second rotating handle drives the driving arc block to rotate, and the driving arc block drives the lifting block 304b to move away from the second rotating handle. The lifting block 304b drives the lifting plate to move, and the lifting plate drives the connecting block to move, and the connecting block drives the lifting tooth plate to move, and the lifting tooth plate drives the rotating gear to rotate, and the rotating gear drives the rotating rod to rotate, and the rotating rod drives the limit block to rotate, so that the limit block stops restricting the movement of the measuring ball. At this time, the staff observes the movement of the measuring ball and makes a diagnosis of the tilt of the sensor.

[0051] Step 5: The staff starts the heater, heats the sensor to be diagnosed at different temperatures, and observes and records the moving distance of the measuring block, so as to diagnose the thermal expansion of the sensor;

[0052] Step 6: After completing the diagnosis, the staff removes the main board from the sensor and pushes the second handle so that the second handle drives the double-sided arc block to move toward the abutment block through the pushing rod and the pushing block, so that the double-sided arc block abuts against the abutment block and drives the abutment block to move away from the double-sided arc block. When the abutment block moves to the side of the double-sided arc block close to the pushing block, the second handle is quickly pulled back so that the abutment block moves along the inclined surface on one side of the double-sided arc block to the side of the single-sided arc block close to the driving block 303a. At this time, the staff rotates the first handle to drive the positioning assembly to reset, then places the measuring ball on the card block, and then rotates the second handle to complete the reset of the separation assembly, the lifting assembly and the second detection assembly.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A sensor fault diagnosis device for a thermal power plant, characterized in that: include, Mainboard (100); A first detection component (200) comprises a measuring plate (201) arranged at the bottom end of the main board (100), two measuring plates (201) are symmetrically arranged, the top ends of the measuring plates (201) both pass through the main board (100) and extend to the top end of the main board (100), a measuring block (202) is fixedly mounted on one end of the measuring plate (201) extending to the top end of the main board (100), auxiliary components (203) are arranged on both sides of the measuring block (202), a heater (204) is arranged on one side of the measuring plate (201), and the heater (204) is fixedly mounted on the bottom end of the main board (100); The positioning assembly (300) comprises a driving plate (301) arranged on one side of the measuring plate (201), the driving plate (301) being slidably mounted on the inner wall of a driving slide groove (201a), the driving slide groove (201a) being opened on one side of the measuring plate (201), the inner wall of the driving plate (301) being threadedly mounted with a bidirectional screw rod (302), one end of the bidirectional screw rod (302) being fixedly mounted with a first rotating handle (302a), and the other end of the bidirectional screw rod (302) being provided with a separation assembly (303).

2. The thermal power plant sensor fault diagnosis device according to claim 1, characterized in that: The separation assembly (303) comprises a driving block 303a (303a) arranged at one end of a bidirectional screw rod (302); a second handle (303b) is slidably mounted on the outer wall of the driving block 303a (303a); a lifting assembly (304) is arranged on the outer wall of the second handle (303b); a pushing rod (303c) is fixedly mounted on one end of the second handle (303b); a pushing block (303d) is fixedly mounted on the outer wall of the pushing rod (303c); a double-sided arc block (303e) and a single-sided arc block (303f) are arranged on one side of the pushing block (303d); the single-sided arc A driving groove is provided at one end of the block (303f); the double-sided arc block (303e) is slidably mounted on the outer wall of the pushing rod (303c); the single-sided arc block (303f) is fixedly mounted on the outer wall of the pushing rod (303c); the top ends of the double-sided arc block (303e) and the single-sided arc block (303f) are abutted against an abutting block (303g); a telescopic rod (303h) is mounted on the top end of the abutting block (303g); the top end of the telescopic rod (303h) is fixedly mounted on the inner wall of the driving block 303a (303a); and the outer wall of the telescopic rod (303h) is wound with a first spring (303i).

3. The thermal power plant sensor fault diagnosis device according to claim 2, characterized in that: The lifting assembly (304) includes a driving arc block (304a) arranged on the outer wall of the second rotating handle (303b), a lifting block 304b (304b) is abutted on one side of the second rotating handle (303b), a lifting plate (304c) is fixedly installed on the top of the lifting block 304b (304b), a connecting block (304d) is fixedly installed on the top of the lifting plate (304c), and a second detection assembly (400) is arranged at one end of the connecting block (304d).

4. The thermal power plant sensor fault diagnosis device according to claim 3, characterized in that: The second detection component (400) includes a lifting tooth plate (401) arranged at one end of the connecting block (304d), both ends of the lifting tooth plate (401) are meshed with a changing gear (402), one side of the changing gear (402) is meshed with a rotating gear (403), one side of the rotating gear (403) is fixedly installed with a rotating rod (404), the bottom end of the rotating rod (404) is fixedly installed with a limit block (405), a measuring ball (406) is arranged between the limit blocks (405), and the measuring ball (406) is slidably installed on the inner wall of a horizontal slide groove (407), and the horizontal slide groove (407) is fixedly installed on the top of the main board (100).

5. The thermal power plant sensor fault diagnosis device according to claim 4, characterized in that: The auxiliary component (203) comprises a first tilting block (203a) arranged on both sides of the measuring block (202); one side of the first tilting block (203a) is abutted against a second tilting block (203b); one end of the second tilting block (203b) away from the first tilting block (203a) is fixedly mounted with a rotating plate (203c); the rotating plates (203c) are rotatably mounted on the top of the main board (100); second springs (203d) are arranged on both sides of the rotating plate (203c); one end of the second spring (203d) away from the rotating plate (203c) is mounted on one side of a fixed block (203e); and the fixed blocks (203e) are fixedly mounted on the top of the main board (100).

6. The thermal power plant sensor fault diagnosis device according to claim 5, characterized in that: Guide rods (304e) are symmetrically fixedly installed at the bottom ends of both ends of the lifting plate (304c), and the bottom ends of the guide rods (304e) pass through the main board (100) and extend to the bottom end of the main board (100). The outer walls of the guide rods (304e) are wrapped with third springs (304f), and the lifting plate (304c) and the main board (100) are connected via the third springs (304f).

7. The thermal power plant sensor fault diagnosis device according to claim 6, characterized in that: The end of the driving arc block (304a) away from the second handle (303b) is set as a lifting part and a fixing part, the curvature of one side of the lifting part is greater than the curvature of the arc groove at the bottom end of the lifting block 304b (304b), and the curvature of one side of the fixing part is equal to the curvature of the arc groove at the bottom end of the lifting block 304b (304b).

8. The thermal power plant sensor fault diagnosis device according to claim 7, characterized in that: The bottom end of the measuring ball (406) is in contact with a clamping block, and the clamping block is fixedly mounted on the top end of the horizontal sliding groove (407).

9. The thermal power plant sensor fault diagnosis device according to claim 8, characterized in that: The auxiliary components (203) are staggeredly installed on both sides of the measuring block (202).

10. A diagnostic method for a sensor fault diagnostic device in a thermal power plant, characterized in that: The specific steps are as follows: Placing the main board (100) on top of the sensor to be diagnosed, so that the sensor to be diagnosed is placed between the measuring boards (201); Rotating the first rotating handle (302a) until the two measuring plates (201) abut against two sides of the sensor to be diagnosed; Pushing the second rotating handle (303b) causes the first spring (303i) to release its elastic potential energy, causing elastic deformation to push the abutment block (303g) to move into the driving slot; By rotating the second rotating handle (303b), the staff observes the movement of the measuring ball (406) and makes a diagnosis of the tilt of the sensor; Starting the heater (204), heating the sensor to be diagnosed at different temperatures by the heater (204), and observing and recording the moving distance of the measuring block (202), so as to diagnose the thermal expansion of the sensor; After completing the diagnosis, the staff removes the main board (100) from the sensor and resets the separation component, the lifting component and the second detection component.

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