Eddy current sensor fixing device

Abstract

The utility model discloses an eddy current sensor fixing device, which belongs to the related technical field of hydro-generators and comprises an eddy current sensor body and a mounting base, a vertical plate is fixedly connected to the middle of the upper surface of the mounting base, and a strip-shaped hole is longitudinally formed in the surface of the vertical plate. Locking nuts are symmetrically connected to the outer side of the eddy current sensor body in a threaded mode, bosses which are of an annular structure are integrally formed at the ends of the locking nuts, a plurality of positioning holes are formed in the outer walls of the bosses in the radial direction of the bosses, and after the locking nuts are rotated in place, the bosses can be located in the positioning holes in a matched mode. The bottom end of the positioning rod is connected with the corresponding positioning hole formed in the outer wall of the boss in an inserted mode through the elastic acting force of the spring, the locking nut can be effectively prevented from loosening in the carrying process, and therefore the stable effect of fixing the eddy current sensor body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field related to water turbine generators, and more specifically to a fixing device for an eddy current sensor. Background Art

[0002] Existing vibration and swing sensors for hydropower units are generally fixed on the fixed brackets of the power plant. A round hole is punched in the steel trough bracket, and the sensor is fixed through the small hole. However, this requires drilling a hole somewhere in the pit of the hydropower generator in advance and welding the fixed bracket, which is inconvenient to operate and the space is small. If it is necessary to carry out stability tests on hydropower units on site, test personnel are generally required to carry eddy current sensors to measure the swing of the upper guide, lower guide, and water guide or the horizontal and vertical vibration of the upper and lower frames. If the power plant where the test is conducted does not have a fixed bracket installed, it can only be done by designing an additional portable device so that

[0003] Used to install the eddy current sensor and fix it.

[0004] At present, there is no device with reasonable structural design and very effective and convenient installation. If a fixing device that is small, easy to carry and easy to use is designed, it will greatly facilitate the work of test and inspection personnel. The existing patent is an eddy current sensor fixing device. The patent authorization number is CN 215726344 U. The eddy current sensor can be easily installed and fixed. The structure is reasonable and the installation is very effective and convenient. The device is small and easy to carry, which greatly facilitates the test and inspection personnel to install the sensor.

[0005] However, the eddy current sensor in patent authorization number CN 215726344 U can freely move up and down in the vertical direction in the waist-shaped groove to adjust the height, or move forward and backward to adjust the distance between the eddy current sensor and the measured surface, and finally the eddy current sensor is tightened by two fixing nuts. Since the eddy current sensor is subjected to vibration and friction during carrying, the fixing nuts are prone to loosening, and the fixing nuts need to be tightened repeatedly, resulting in unstable fixation of the eddy current sensor. Utility Model Content

[0006] In response to the problems existing in the prior art, the purpose of the utility model is to provide an eddy current sensor fixing device, which can use the elastic force of the spring to connect the bottom end of the positioning rod with the corresponding positioning hole opened on the outer wall of the boss after the locking nut is rotated into place, and can effectively prevent the locking nut from loosening during carrying, thereby ensuring the stable fixation effect of the eddy current sensor body.

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] An eddy current sensor fixing device comprises an eddy current sensor body and a mounting base;

[0009] A vertical plate is fixedly connected to the middle of the upper surface of the mounting base, and a strip-shaped hole is longitudinally opened on the surface of the vertical plate;

[0010] The outer side of the eddy current sensor body is symmetrically threaded with a locking nut, the end of the locking nut is integrally formed with a boss arranged in a ring structure, the outer wall of the boss is provided with a positioning hole, and a plurality of the positioning holes are arranged at radial positions of the boss;

[0011] Grooves are provided on both side surfaces of the vertical plate located above the top of the strip hole, a movable plate is installed on the inner side of the groove, guide blocks are welded on the outer walls of both sides of the movable plate, and guide grooves that are gap-matched with the guide blocks are provided on the inner wall of the groove. A spring is provided above the movable plate, and a positioning rod that is plugged into the positioning hole 7 is installed on the lower surface of the movable plate.

[0012] Furthermore, a rubber ring is embedded on the surface of the boss close to and away from the locking nut, and the rubber ring is in contact with the vertical plate.

[0013] Furthermore, the eddy current sensor body passes through the strip-shaped hole, and the outer wall of the eddy current sensor body abuts against the inner wall of the strip-shaped hole.

[0014] Furthermore, the outer diameter of the bottom end of the positioning rod is matched with the inner diameter of the positioning hole.

[0015] Furthermore, the end of the movable plate protrudes from the end of the groove, and the protruding end of the movable plate is provided with a round chamfer.

[0016] Furthermore, the bottom end of the spring is connected to the upper surface of the movable plate, and the top end of the spring is connected to the top wall of the groove.

[0017] Furthermore, an assembly hole is opened on the edge of the mounting base, and a plurality of the assembly holes are symmetrically arranged.

[0018] Compared with the prior art, the utility model has at least the following beneficial technical effects:

[0019] (1) In this solution, the movable plate is manually dragged upward, and the guide block slides upward in cooperation with the guide groove, and the spring is compressed and deformed. After the locking nut is rotated into place, the elastic force of the spring is utilized to connect the bottom end of the positioning rod with the corresponding positioning hole provided on the outer wall of the boss. This can effectively prevent the locking nut from loosening during carrying, thereby ensuring the stable fixing effect of the eddy current sensor body.

[0020] (2) In this solution, during the process of screwing in the locking nut, the rubber ring is pressed against the vertical plate and deformed, and the elastic force of the rubber ring is used to apply a reverse force to the locking nut, thereby further preventing the locking nut from loosening and ensuring the fixing stability of the eddy current sensor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the locking nut structure of the utility model;

[0023] Figure 3 It is an enlarged schematic diagram of part A of the utility model;

[0024] Figure 4 It is a front view schematic diagram of the utility model.

[0025] Description of the numbers in the figure:

[0026] 1. Eddy current sensor body; 2. Mounting base; 3. Vertical plate; 4. Strip hole; 5. Locking nut; 6. Boss; 7. Positioning hole; 8. Rubber ring; 9. Groove; 10. Movable plate; 11. Guide block; 12. Positioning rod; 13. Guide groove; 14. Spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0028] Example:

[0029] See also Figure 1-4, a fixing device for an eddy current sensor, comprising an eddy current sensor body 1, and also comprising a mounting base 2; a vertical plate 3 is fixedly connected to the middle part of the upper surface of the mounting base 2, and a strip hole 4 is longitudinally opened on the surface of the vertical plate 3; a locking nut 5 is symmetrically screwed on the outer side of the eddy current sensor body 1, and a boss 6 arranged in a ring structure is integrally formed at the end of the locking nut 5, and a positioning hole 7 is opened on the outer wall of the boss 6, and a plurality of positioning holes 7 are arranged at the radial position of the boss 6; grooves 9 are opened on the two side surfaces of the vertical plate 3 located above the top of the strip hole 4, and a movable plate 10 is installed on the inner side of the groove 9, and guide blocks 11 are welded on the outer walls of both sides of the movable plate 10, and a guide groove 13 with a clearance fit with the guide block 11 is opened on the inner wall of the groove 9, a spring 14 is arranged above the movable plate 10, and a positioning rod 12 connected to the positioning hole 7 by plugging is installed on the lower surface of the movable plate 10.

[0030] It should be noted that when the eddy current sensor fixing device is in use, the eddy current sensor body 1 is inserted into the inner side of the strip hole 4 opened at the vertical plate 3, and the vertical height is adjusted to adapt to the surface to be measured. After the height position of the eddy current sensor body 1 is adjusted, the two rotating locking nuts 5 are respectively screwed with the two ends of the eddy current sensor body 1, until they can no longer be screwed in. While rotating the locking nut 5, the movable plate 10 is manually dragged to move upward, and the guide block 11 cooperates with the guide groove 13 to slide upward, and the spring 14 is compressed and deformed. After the locking nut 5 is rotated into place, the elastic force of the spring 14 is used to make the bottom end of the positioning rod 12 plug and connect with the corresponding positioning hole 7 opened on the outer wall of the boss 6. During the carrying process, the locking nut 5 can be effectively prevented from loosening, thereby ensuring the stable effect of fixing the eddy current sensor body 1.

[0031] like Figure 1 , Figure 2 As shown, a rubber ring 8 is embedded on the surface of the boss 6 close to and away from the locking nut 5 , and the rubber ring 8 is in contact with the vertical plate 3 .

[0032] It should be noted that, during the process of screwing in the locking nut 5, the rubber ring 8 is brought close to the vertical plate 3 and squeezed and deformed, and the elastic force of the rubber ring 8 is used to apply a reverse force to the locking nut 5, thereby further preventing the locking nut 5 from loosening and ensuring the fixing stability of the eddy current sensor body 1.

[0033] like Figure 1 As shown, the eddy current sensor body 1 passes through the strip-shaped hole 4 , and the outer wall of the eddy current sensor body 1 abuts against the inner wall of the strip-shaped hole 4 .

[0034] It should be noted that the eddy current sensor body 1 is inserted into the inner side of the strip hole 4 opened on the vertical plate 3, and the vertical height is adjusted to adapt to the surface to be measured.

[0035] like Figure 1 , Figure 2 , Figure 3 As shown, the outer diameter of the bottom end of the positioning rod 12 is adapted to the inner diameter of the positioning hole 7;

[0036] It should be noted that the stability of the combination between the positioning rod 12 and the positioning hole 7 is ensured, and at the same time, the locking nut 5 can be effectively prevented from loosening.

[0037] like Figure 3 As shown, the end of the movable plate 10 protrudes from the end of the groove 9, and the protruding end of the movable plate 10 is provided with a round chamfer, the bottom end of the spring 14 is connected to the upper surface of the movable plate 10, and the top end of the spring 14 is connected to the top wall of the groove 9.

[0038] It should be noted that it is convenient to manually drag the movable plate 10 to move up and down in coordination with the groove 9 , and use the elastic force of the spring 14 to press the movable plate 10 downward.

[0039] like Figure 1 As shown, the edge of the mounting base 2 is provided with a mounting hole, and a plurality of the mounting holes are symmetrically arranged.

[0040] It should be noted that the mounting base 2 can be mounted and fixed in a designated measurement area.

[0041] When in use: insert the eddy current sensor body 1 into the inner side of the strip hole 4 opened on the vertical plate 3, and adjust the vertical height to adapt to the surface to be measured. After adjusting the height position of the eddy current sensor body 1, rotate the two locking nuts 5 to be screwed with the two ends of the eddy current sensor body 1 respectively, until they can no longer be screwed in. While rotating the locking nut 5, manually drag the movable plate 10 to move upward, and at the same time make the guide block 11 slide upward with the guide groove 13, and compress and deform the spring 14. After the locking nut 5 is rotated into place, the elastic force of the spring 14 is used to make the bottom end of the positioning rod 12 plug and connect with the corresponding positioning hole 7 opened on the outer wall of the boss 6, which can effectively prevent the locking nut 5 from loosening during carrying.

[0042] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A fixing device for an eddy current sensor, characterized in that: It comprises an eddy current sensor body (1) and a mounting base (2); A vertical plate (3) is fixedly connected to the middle of the upper surface of the mounting base (2), and a strip-shaped hole (4) is longitudinally opened on the surface of the vertical plate (3); A locking nut (5) is symmetrically threaded on the outer side of the eddy current sensor body (1); a boss (6) arranged in an annular structure is integrally formed at the end of the locking nut (5); a positioning hole (7) is formed on the outer wall of the boss (6); and a plurality of positioning holes (7) are arranged at radial positions of the boss (6); Grooves (9) are provided on both side surfaces of the vertical plate (3) located above the top of the strip hole (4), a movable plate (10) is installed on the inner side of the groove (9), guide blocks (11) are welded on the outer walls of both sides of the movable plate (10), a guide groove (13) with a clearance fit with the guide block (11) is provided on the inner wall of the groove (9), a spring (14) is provided above the movable plate (10), and a positioning rod (12) plug-connected to the positioning hole (7) is installed on the lower surface of the movable plate (10).

2. The eddy current sensor fixing device according to claim 1, characterized in that: A rubber ring (8) is embedded on the surface of the boss (6) close to and away from the locking nut (5), and the rubber ring (8) is in contact with the vertical plate (3).

3. The eddy current sensor fixing device according to claim 1, characterized in that: The eddy current sensor body (1) passes through the strip-shaped hole (4), and the outer wall of the eddy current sensor body (1) abuts against the inner wall of the strip-shaped hole (4).

4. The eddy current sensor fixing device according to claim 1, characterized in that: The outer diameter of the bottom end of the positioning rod (12) is matched with the inner diameter of the positioning hole (7).

5. The eddy current sensor fixing device according to claim 1, characterized in that: The end of the movable plate (10) protrudes from the end of the groove (9).

6. The eddy current sensor fixing device according to claim 5, characterized in that: The protruding end of the movable plate (10) is provided with a round chamfer.

7. The eddy current sensor fixing device according to claim 1, characterized in that: The bottom end of the spring (14) is connected to the upper surface of the movable plate (10), and the top end of the spring (14) is connected to the top wall of the groove (9).

8. The eddy current sensor fixing device according to claim 1, characterized in that: An assembly hole is provided on the edge of the installation base (2).

9. The eddy current sensor fixing device according to claim 8, characterized in that: A plurality of the assembly holes are symmetrically arranged.

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