Bolt tensile value measurement verification platform

Abstract

The utility model discloses a bolt stretching value measuring and verifying platform which comprises a fixed base, two guide rails are arranged at one end of the fixed base in an extending mode, a sliding base which slides in a matched mode is arranged on the guide rails, and a first vertical plate and a second vertical plate are perpendicularly arranged on the fixed base and the sliding base respectively. The two vertical plates are parallel to each other, a plurality of first bolt mounting grooves for bolts to penetrate through are coaxially formed in the two vertical plates, and a first dial indicator and an ultrasonic probe are arranged on the opposite side faces of the two vertical plates respectively. Data support can be provided for popularization and application of the ultrasonic bolt axial force measuring instrument in maintenance of a hydroelectric generating set, and the portability, the measurement precision and the measurement efficiency of bolt axial force measurement are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of overhaul of hydro-generator units, and particularly relates to a bolt tensile value measurement and verification platform. Background Art

[0002] There are numerous bolts in hydro-generator units, with various types and specifications. Whether the elongation value of the bolts meets the requirements is crucial for the safe and stable operation of the units. During the overhaul on-site, the elongation value is usually measured by installing dial gauges. However, there are problems such as cumbersome processes, difficulties in installing dial gauges in narrow spaces, and inaccurate measurement results for blind-hole bolts. The ultrasonic bolt axial force measuring instrument is easy to operate and has high precision, but its applicability and measurement accuracy for bolts in hydro-generator units still need to be verified. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to overcome the above deficiencies. Therefore, in order to verify the consistency between the measurement accuracy of the ultrasonic bolt axial force measuring instrument and the measurement data of traditional methods, and to provide data support for the further popularization and application of the ultrasonic bolt axial force measuring instrument in the overhaul of hydro-generator units, a bolt axial force test and verification platform is developed.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions: A bolt axial force test and verification platform, including a fixed base. At one end of the fixed base, two guide rails are extended. A sliding base that fits and slides is arranged on the guide rails. On the fixed base and the sliding base, a first vertical plate and a second vertical plate are respectively vertically arranged. The two vertical plates are parallel to each other. On the two vertical plates, a number of first bolt installation grooves for bolts to pass through are coaxially arranged. On the opposite sides of the two vertical plates, a first dial gauge and an ultrasonic probe are respectively arranged.

[0005] Preferably, a vertical plate is also vertically arranged on the sliding base. The vertical plate is located between the two vertical plates and is arranged parallel to the two vertical plates. On the vertical plate, a first bolt installation groove corresponding to the two vertical plates is also arranged for the bolt to pass through.

[0006] Preferably, both of the two vertical plates are higher than the vertical plate. Second bolt installation grooves are opened at the side positions of the two vertical plates that are higher than the vertical plate.

[0007] Preferably, an ultrasonic probe is arranged on the side of the vertical plate close to the fixed base.

[0008] Preferably, an L-shaped support frame is arranged on the side of the first vertical plate far from the second vertical plate. The first dial gauge is mounted on the top of the L-shaped support frame and is erected on the end face of the second bolt installation groove.

[0009] Preferably, a second dial gauge is arranged on the opposite side of the second vertical plate to the first vertical plate. The second dial gauge is erected on the end face of the first bolt installation groove.

[0010] Preferably, internal threads are provided in both the first bolt installation groove and the second bolt installation groove to cooperate with nuts to fix the bolts.

[0011] The beneficial effects of the present utility model are as follows:

[0012] (1) The structure is simple and the measurement is convenient. During the measurement process, only the bolt to be measured needs to be inserted, then the bolt is manually pre-tightened, and finally the data is read.

[0013] (2) The result accuracy is high. The elongation value measurement under the same pre-tightening state of the same bolt is realized, excluding the influence of other factors, and the result accuracy is high.

[0014] (3) Through the test verification of the device, it can provide data support for the popularization and application of the ultrasonic bolt axial force measuring instrument in the maintenance of hydropower units, and improve the portability, measurement accuracy and measurement efficiency of bolt axial force measurement. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the first embodiment of the present utility model;

[0016] Figure 2 It is a top view of the first embodiment of the present utility model;

[0017] Figure 3 It is a rear view of the first embodiment of the present utility model;

[0018] Figure 4 It is a schematic diagram of the second embodiment of the present utility model;

[0019] Figure 5 It is a schematic diagram of the third embodiment of the present utility model;

[0020] 1. Fixed base; 2. Guide rail; 3. Sliding base; 4. First vertical plate; 5. Vertical plate; 6. First bolt installation groove; 7. Ultrasonic probe; 8. L-shaped support frame; 9. First dial indicator; 10. Second dial indicator; 41. Second vertical plate; 61. Second bolt installation groove. Detailed Description of the Embodiment

[0021] To describe in detail the technical content, the achieved purpose and the effects of the present utility model, the following is described in conjunction with the implementation methods and with reference to the drawings.

[0022] As Figure 1 Figure 3As shown in the figure, a bolt axial force test and verification platform includes a fixed base 1. One end of the fixed base 1 extends with two guide rails 2. A sliding base 3 that fits and slides is arranged on the guide rails 2. First vertical plates 4 and second vertical plates 41 are respectively vertically arranged on the fixed base 2 and the sliding base 3. The two vertical plates are parallel to each other. A number of first bolt mounting grooves 6 for bolts to pass through are coaxially arranged on the two vertical plates. First dial indicators 9 and ultrasonic probes 7 are respectively arranged on the opposite side surfaces of the two vertical plates. This embodiment is the first embodiment of the present application. The main purpose of the application is to verify the measurement data of the ultrasonic probe 7. When in use, by arranging the first bolt mounting grooves 6 on the two vertical plates, the ultrasonic probe 7 can be used to measure the tensile value of the bolt, and then the accuracy of the ultrasonic probe 7 can be determined by secondary measurement with the dial indicator. By means of the sliding base 3, the distance of the first bolt mounting groove 6 can be extended by fitting and sliding, so that various long bolts can be fixed and measured. Internal threads are arranged in the first bolt mounting grooves 6 for bolts to pass through and are fixed to a certain extent by nuts, which is convenient for measurement.

[0023] Preferably, a vertical plate 5 is also vertically arranged on the sliding base 3. The vertical plate 5 is located between the two vertical plates and is arranged parallel to the two vertical plates. A first bolt mounting groove 6 corresponding to the two vertical plates is also arranged on the vertical plate 5 for the bolt to pass through. As Figure 4 shown, this solution is the second embodiment of the present application. When measuring an ultra-long bolt, such as an M22 bolt, because the bolt itself is relatively long, it may shake during measurement. To increase the stability of the bolt, the vertical plate 5 is set. When in use, the ultra-long bolt passes through the first vertical plate 4, the vertical plate 5, and the second vertical plate 41. First bolt mounting holes 6 are arranged on the first vertical plate 4, the vertical plate 5, and the second vertical plate 41, which can keep the bolt stable. At the same time, the position of the vertical plate 5 on the top of the movable base 3 and the vertical plate 4 is fixed.

[0024] Preferably, both of the two vertical plates are higher than the vertical plate 5. Second bolt mounting grooves 61 are opened at the positions where the two vertical plates are higher than the vertical plate 5. When in use, other specifications of bolts can be carried on the second bolt mounting grooves 61 for measurement.

[0025] Preferably, an ultrasonic probe 7 is arranged on one side of the vertical plate 5 close to the fixed base 2. In this embodiment, an ultrasonic probe 7 is added to the side surface of the vertical plate 5 to measure the bolt on the vertical plate 5.

[0026] Preferably, an L-shaped support frame 8 is arranged on one side of the first vertical plate 4 away from the second vertical plate 41. The first dial indicator is mounted on the top of the L-shaped support frame 8 and is erected on the end face of the second bolt mounting groove 61.

[0027] Preferably, a second dial indicator 10 is provided on the back surface of the second vertical plate 41 facing away from the first vertical plate 4. The second dial indicator 10 is mounted on the end face of the first bolt mounting groove 6. As Figure 5 shown, this solution is the third embodiment of the present application. During use, when measuring bolts of different lengths, the shorter bolt is fixed through the first bolt mounting groove 6, and then the ultrasonic probe 7 and the second dial indicator provided on the side of the vertical plate 5 are used for measurement and verification respectively. When facing a longer bolt, it is fixed through the second bolt mounting groove 61, and then the ultrasonic probe 7 and the first dial indicator provided on the vertical plate are used for measurement and verification respectively.

[0028] Preferably, internal threads are provided inside both the first bolt mounting groove 6 and the second bolt mounting groove 61 to cooperate with nuts to fix the bolts. During use, the bolt is inserted into the first bolt mounting groove 6 or the second bolt mounting groove 61, and the other end is fixed with a nut, and then the dial indicator and the ultrasonic probe are used for testing to prevent the bolt from shaking.

[0029] Specific implementation manner of the present application: In the first embodiment, during use, first pass the bolt through the first bolt mounting groove 6, then mount a dial indicator on the end face of the bolt to measure the elongation value of the bolt, then remove the dial indicator and record the value; then place the ultrasonic probe 7 on the end face of the bolt, measure the elongation value of the bolt at this time and record it. Just record the data obtained by the two measurement methods. This platform can realize the verification of the result differences of the two measurement methods under different bolt model specifications and different pre-tightening forces.

[0030] The second embodiment is that when a longer bolt needs to be measured, move the sliding base 3 to a suitable position for bolt measurement, then pass the bolt through the first bolt mounting groove 6 on the first vertical plate 4 through the vertical plate 5, and finally fix it on the second vertical plate 41. By adding the vertical plate 5, the stability of the bolt is further improved, and finally the measurement steps are repeated.

[0031] The third embodiment is that when two bolts of different lengths need to be measured simultaneously, first fix the short bolt on the vertical plate 5 and the second vertical plate 41 through the first bolt mounting groove 6, and then measure and verify it through the second dial indicator 10 and the ultrasonic probe 7 on the side of the vertical plate 5. Then fix the long bolt in the second bolt mounting groove 61 on the two vertical plates, and measure and verify it through the ultrasonic probes 7 and the first dial indicators 9 provided on the sides of the two vertical plates respectively.

[0032] It should be understood that the above has made a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. This does not limit the patent scope of the present invention. Any equivalent transformation made using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, is covered within the protection scope of the present invention.

Claims

1. A bolt tensile value measurement and verification platform, characterized in that, It includes a fixed base (1), one end of the fixed base (1) is extended with a guide rail (2), a sliding base (3) which is in sliding fit is arranged on the guide rail (2), a first vertical plate (4) and a second vertical plate (41) are respectively and vertically arranged on the fixed base (1) and the sliding base (3), a number of first bolt mounting grooves (6) for bolts to pass through are coaxially arranged on the surfaces of the first vertical plate (4) and the second vertical plate (41), and a first dial indicator (9) and an ultrasonic probe (7) are respectively arranged on the opposite sides of the first vertical plate (4) and the second vertical plate (41).

2. The bolt tensile value measurement and verification platform according to claim 1, characterized in that, A vertical plate (5) is also vertically arranged on the sliding base (3), the vertical plate (5) is located between the first vertical plate (4) and the second vertical plate (41) and is arranged parallel to them, and a first bolt mounting groove (6) for bolts to pass through is also arranged on the vertical plate (5).

3. A bolt tensile value measurement and verification platform according to claim 1, characterized in that, Both the first vertical plate (4) and the second vertical plate (41) are higher than the vertical plate (5), and second bolt mounting grooves (61) are formed at the side positions of the two vertical plates higher than the vertical plate (5).

4. A bolt tensile value measurement and verification platform according to claim 3, characterized in that, An ultrasonic probe (7) is arranged on the side of the vertical plate (5) close to the fixed base (1).

5. A bolt tensile value measurement and verification platform according to claim 4, characterized in that, An L-shaped support frame (8) is arranged on the side of the first vertical plate (4) far from the second vertical plate (41), and the first dial indicator is mounted on the end face of the second bolt mounting groove (61) through the L-shaped support frame (8).

6. A bolt tensile value measurement and verification platform according to claim 5, characterized in that A second dial indicator (10) is arranged on the opposite side of the second vertical plate (41) from the first vertical plate (4), and the second dial indicator (10) is mounted on the end face of the first bolt mounting groove (6).

7. A bolt tensile value measurement and verification platform according to claim 3, characterized in that, Internal threads are provided in both the first bolt mounting groove (6) and the second bolt mounting groove (61) to cooperate with nuts to fix the bolts.

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