A pump storage unit top cover bolt dynamic stress test inductor installation support

Abstract

The utility model discloses a kind of pumped storage unit top cover bolt dynamic stress test inductor mounting bracket, it is related to unit monitoring technical field.The bracket includes sleeve, adjusting nut and support plate, sleeve is fixedly sleeved in bolt end, outer wall is equipped with axial scale;Adjusting nut is threadedly connected with sleeve, and the height of sleeve axial can be adjusted;Support plate is horizontally fixed to the outside of tightening member, and is equipped with mounting hole for installing inductor.The utility model adjusts support plate height by adjusting nut, ensures that temperature sensor, vibration sensor and ultrasonic sensor are in the same plane, solve the problem of large flatness deviation in existing installation mode, and simple structure, convenient to adjust, applicable to the unit environment of high vibration.

Description

Technical Field

[0001] This utility model relates to the field of pumped storage unit monitoring technology, and in particular to a mounting bracket for a dynamic stress test sensor for the top cover bolts of a pumped storage unit. Background Technology

[0002] During the dynamic stress test of the top cover bolts of the pumped storage unit, ultrasonic sensors, temperature sensors and vibration sensors for stress measurement need to be installed simultaneously, and the three should be roughly in the same axial plane in order to carry out multi-parameter coupling analysis.

[0003] The existing sensor installation methods have the following drawbacks:

[0004] When using a fixed bracket, the sensor height cannot be adjusted;

[0005] When using shims to elevate the sensor, the shims are prone to falling off under unit vibration conditions, and the adjustment accuracy is low.

[0006] The lack of a rigid connection structure with bolts makes the entire support structure prone to tilting. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a mounting bracket for a dynamic stress test sensor on the top cover bolts of a pumped storage unit. This bracket solves the problems of large flatness deviation and difficulty in height adjustment of the sensor in existing technologies. By adjusting the height of the support plate with an axially adjustable nut, the sensors are placed on the same plane, thus improving the accuracy of the test data.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A mounting bracket for a dynamic stress test sensor on the top cover bolts of a pumped storage unit includes a sleeve, an adjusting nut, and a support plate. The sleeve has symmetrical radial slots extending from the bottom to the center. The outer wall of the sleeve has external threads. The adjusting nut is threaded to the sleeve to tighten one end of the sleeve, thereby pressing the sleeve onto the bolt. The support plate is fixedly connected to the end of the sleeve for mounting the sensor.

[0010] Furthermore, the sleeve is configured as a cone shape, with the diameter of the tightening opening of the sleeve gradually increasing towards the other end.

[0011] Furthermore, the inner cavity of the adjusting nut is tapered.

[0012] Furthermore, the ends of the slot are rounded.

[0013] Furthermore, the slots are provided in four parts and arranged in a circular array.

[0014] Furthermore, the support plate is provided with mounting holes for mounting columnar sensors.

[0015] Furthermore, the mounting hole is provided with an internal thread.

[0016] Furthermore, the support plate is provided with four arranged in a circular array.

[0017] Furthermore, a net is fixedly connected to the bottom of the support plate, and the net is located directly below the mounting hole.

[0018] Furthermore, the sleeve is made of flexible stainless steel.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By adjusting the axial direction of the sleeve with the adjusting nut, the sensor plane and the ultrasonic sensor on the top of the bolt can be adjusted to be on the same plane, which facilitates quick sensor installation.

[0021] 2. The adjusting nut and the sleeve are threaded together to tighten the sleeve, eliminating the need for custom-made brackets for various sensor mounting, thus reducing testing costs.

[0022] 3. The sleeve and adjusting nut are rigidly connected, which can resist vibrations below 5g, eliminates the risk of loosening, and improves installation efficiency. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0025] Figure 2 This is a top view of an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of an embodiment of the present invention and a bolt assembly structure.

[0027] Among them, bolt 1, sleeve 2, adjusting nut 3, support plate 4, slot 5, mounting hole 6, and net bag 7. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1-3 As shown, a mounting bracket for a dynamic stress testing sensor on the top cover bolts of a pumped storage unit includes a sleeve 2, an adjusting nut 3, and a support plate 4. The specific structure and connection relationship of each component are as follows:

[0030] Sleeve 2: Made of 45 steel, galvanized, with an inner diameter slightly larger than that of M48 bolt 1, and a length of 50mm. The outer wall is machined with M60×1.5 external threads for connecting adjusting nut 3, and is engraved with axial graduations with an accuracy of 0.1mm to indicate the height adjustment range. The sleeve wall has 4 radial slots 5 symmetrically opened, extending from the bottom to the middle, with a length of 30mm. The end is provided with a φ8mm round transition to avoid stress concentration and cracking.

[0031] Adjusting nut 3: Made of 45 steel, in the shape of a ring, with an outer diameter of 80mm and a thickness of 15mm. It has an internal thread of M60×1.5 and mates with the external thread of sleeve 2. Two wrench slots, 10mm wide and 5mm deep, are symmetrically machined on the outer wall to facilitate height adjustment by rotating with a wrench.

[0032] Support Plate 4: Four support plates 4, made of Q235 steel, 5mm thick, are welded in a ring array to the outside of the tightening component at 90° intervals. Each support plate 4 is 50mm away from the axis of the sleeve 2, ensuring that the sensor is located 5cm outside the bolt 1. Each support plate 4 has one mounting hole 6, φ12mm, with an internal thread of M10×1, for mounting a φ10mm temperature sensor and a vibration sensor, such as a PT1000 temperature sensor or a PCB352C33 vibration sensor. A level with an accuracy of 0.02mm / m is welded to the top of the support plate 4 for real-time monitoring of flatness. A reinforcing rib with a thickness of 3mm is welded to the bottom to improve vibration resistance.

[0033] The tapered sleeve 2 and the adjusting nut 3, as well as the tapered fit between the sleeve 2 and the adjusting nut 3, utilize the elastic deformation of the sleeve 2 to clamp the bolt 1, which is used to fix the sleeve 2.

[0034] The Net Bag 7 structure uses a metal mesh to prevent sensor displacement caused by cable pulling, further improving long-term operational stability.

[0035] The sleeve 2 has a toothed groove inside, which is used to engage with the thread on the surface of the bolt 1 to improve the shock resistance of the sleeve 2.

[0036] The working principle is as follows: the adjusting nut 3 is placed on the bolt 1, and then the sleeve 2 is placed on the end of the M48 bolt 1. After the sleeve 2 is at a suitable height on the bolt 1, the adjusting nut 3 is screwed into the external thread of the sleeve 2 to fix the sleeve 2 on the bolt 1. Then, the PT1000 temperature sensor and the PCB352C33 vibration sensor are screwed into the mounting holes 6 of the support plate 4 respectively and fixed by the M10 thread. The ring array support plate 4 ensures that the sensors are evenly distributed circumferentially at a distance of 50mm and keep the same axial plane as the ultrasonic sensor, providing a reliable position reference for multi-parameter coupling analysis.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pumped storage unit top cover bolt dynamic stress test sensor mounting bracket, characterized in that, The device includes a sleeve, an adjusting nut, and a support plate. The sleeve has symmetrical radial slots that extend from the bottom to the center. The outer wall of the sleeve has external threads. The adjusting nut is threaded to the sleeve to tighten one end of the sleeve, thereby pressing the sleeve onto the bolt. The support plate is fixedly connected to the end of the sleeve for mounting a sensor.

2. A mounting bracket for a bolt dynamic stress test sensor of a top cover of a pumped storage unit according to claim 1, characterized in that, The sleeve is tapered, and the diameter of the tightening opening of the sleeve gradually increases towards the other end.

3. A mounting bracket for a bolt dynamic stress test sensor of a top cover of a pumped storage unit according to claim 1, characterized in that, The inner cavity of the adjusting nut is tapered.

4. A mounting bracket for a bolt dynamic stress test sensor of a top cover of a pumped storage unit according to claim 1, characterized in that, The end of the slot is circular.

5. A mounting bracket for a bolt dynamic stress test sensor of a top cover of a pumped storage unit according to claim 4, characterized in that, The slots are provided in four parts and arranged in a circular array.

6. The mounting bracket for a dynamic stress test sensor on the top cover bolts of a pumped storage unit as described in claim 1, characterized in that, The support plate has mounting holes for mounting columnar sensors.

7. The mounting bracket for a dynamic stress test sensor on the top cover bolts of a pumped storage unit as described in claim 6, characterized in that, The mounting hole has an internal thread.

8. The mounting bracket for a dynamic stress test sensor on the top cover bolts of a pumped storage unit as described in claim 7, characterized in that, The support plate is provided in four rows arranged in a circular array.

9. The mounting bracket for a dynamic stress test sensor on the top cover bolts of a pumped storage unit as described in claim 8, characterized in that, A net is fixedly connected to the bottom of the support plate, and the net is located directly below the mounting hole.

10. The mounting bracket for a dynamic stress testing sensor on the top cover bolts of a pumped storage unit as described in claim 1, characterized in that, The sleeve is made of flexible stainless steel.

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