CN215766799U - Special tool for measuring extension value of guide vane crank arm clamping bolt - Google Patents
Special tool for measuring extension value of guide vane crank arm clamping bolt Download PDFInfo
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- CN215766799U CN215766799U CN202121915625.2U CN202121915625U CN215766799U CN 215766799 U CN215766799 U CN 215766799U CN 202121915625 U CN202121915625 U CN 202121915625U CN 215766799 U CN215766799 U CN 215766799U
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- guide vane
- crank arm
- support frame
- clamping bolt
- bolt
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Abstract
The utility model provides a stator turning arm clamp bolt elongation value measures specialized tool, includes bow-shaped support frame, and bow-shaped support frame one end is equipped with the percentage table, and the bow-shaped support frame other end is equipped with adjusting screw, is equipped with lock nut on the adjusting screw, and adjusting screw and percentage table cooperate and are used for being surveyed the work piece bolt centre gripping. The method solves the problem that the guide vane crank arm clamping bolt cannot be erected in hundreds of percent when the extension value of the guide vane crank arm clamping bolt is measured, is simple to operate and improves the measurement precision; in addition, the measuring tool is simple in structure, convenient to manufacture and low in manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of installation of hydraulic power generation equipment, and particularly relates to a special tool for measuring an elongation value of a guide vane crank arm clamping bolt.
Background
The clamping bolt of the guide vane crank arm of the large-scale mixed-flow water turbine is difficult to erect a dial indicator for detection and measurement due to factors such as the arrangement mode of a stretcher and the bolt adopted on site. When a vernier caliper is used for measuring the elongation value of the bolt, due to the parallelism of the end part of the bolt, the measurement error is large, the installation requirement is difficult to meet, and the friction force uniformity between the friction arm and the guide vane crank arm cannot be guaranteed. Therefore, a tool for measuring the elongation value of the guide vane crank arm clamping bolt is lacked at present.
Disclosure of Invention
In view of the technical problems in the background art, the special tool for measuring the elongation value of the guide vane crank arm clamping bolt solves the problem that the guide vane crank arm clamping bolt cannot be erected hundreds of times when the elongation value of the guide vane crank arm clamping bolt is measured, is simple to operate, and improves the efficiency and reliability of measuring the elongation value of the bolt; in addition, the measuring tool is simple in structure, convenient to manufacture and low in manufacturing cost.
In order to solve the technical problems, the utility model adopts the following technical scheme to realize:
the utility model provides a stator turning arm clamp bolt elongation value measures specialized tool, includes bow-shaped support frame, and bow-shaped support frame one end is equipped with the percentage table, and the bow-shaped support frame other end is equipped with adjusting screw, is equipped with lock nut on the adjusting screw, and adjusting screw and percentage table cooperate and are used for being surveyed the work piece bolt centre gripping.
In a preferred scheme, the front end of the adjusting screw rod is a pointed end.
In a preferred scheme, the dial indicator is connected with the arched support frame through a clamp body.
In the preferred scheme, bow-shaped support frame include bow-shaped frame main part, bow-shaped frame main part one end is equipped with two parallel arrangement's backup pad, and the other end is equipped with the clamp, is equipped with the internal thread hole in the backup pad, internal thread hole department is used for installing adjusting screw, the clamp is used for installing the percentage table.
In a preferred embodiment, the supporting plate has a plurality of internal threaded holes, and the plurality of internal threaded holes are linearly arranged.
In a preferred scheme, the lower part of the arched support frame is used for being supported by the movable shelf.
In a preferred scheme, the clamp body comprises a cylinder body, a fastening screw is arranged on the outer wall of the cylinder body, and a rotating handle is arranged at the end part of the fastening screw.
This patent can reach following beneficial effect:
1. the method solves the problem that the guide vane crank arm clamping bolt cannot be erected in hundreds of percent when the extension value of the guide vane crank arm clamping bolt is measured, is simple to operate and improves the measurement precision; in addition, the measuring tool is simple in structure, convenient to manufacture and low in manufacturing cost.
2. The accessible adjustment bolt position can be adapted to the bolt elongation value measurement of different length, has certain universality.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a diagram illustrating the effect of the present invention;
FIG. 2 is a front view of the arcuate support frame of the present invention;
FIG. 3 is a side view of the present invention;
FIG. 4 is a view of the structure of the clip body of the present invention;
fig. 5 is a schematic view of a conventional guide vane crank arm clamping bolt.
In the figure: the device comprises a 1-arch support frame, 101-arch frame main body, 102-support plate, 103-internal threaded hole, 2-adjusting screw, 3-locking nut, 4-measured workpiece bolt, 5-dial indicator, 6-crank arm cover plate, 7-crank arm, 8-clamp body, 81-cylinder body, 82-fastening screw and 83-rotating handle.
Detailed Description
The preferable scheme is as shown in fig. 1-3, and a special tool for measuring the extension value of a guide vane crank arm clamping bolt comprises an arched support frame 1, wherein one end of the arched support frame 1 is provided with a dial indicator 5, the other end of the arched support frame 1 is provided with an adjusting screw rod 2, the adjusting screw rod 2 is provided with a locking nut 3, and the adjusting screw rod 2 and the dial indicator 5 are matched to clamp a tested workpiece bolt 4.
As shown in fig. 1, the tested workpiece bolt 4 in this embodiment is a guide vane crank arm clamping bolt, and after the guide vane crank arm clamping bolt receives the pretightening force, the length of the guide vane crank arm clamping bolt changes, and whether the pretightening force of the bolt meets the design requirements is judged through the elongation. The adjusting screw 2 can adjust the measurement length, is used for the dial indicator zero calibration when measuring, when the adjustment of the dial indicator is finished, the adjusting bolt is fixed by the locking nut, the dial indicator is installed and fixed on the bow-shaped supporting frame, and the measuring pin of the dial indicator is directly contacted with the end face of the bolt to be measured.
In order to avoid the situation that the arched support frame is deformed and bent, the arched support frame is preferably made of a material with higher hardness.
The front end of the adjusting screw rod 2 is a pointed end. Making a sample punching point on the surface of the end part of the bolt 4 of the workpiece to be measured, and then measuring; the pointed end is placed at the sample punching point, so that a fixed reference is provided for measurement.
The dial indicator 5 is connected with the arched support frame 1 through a clamp body 8. The position of the dial indicator can be adjusted.
As shown in fig. 2-3, the bow support frame 1 includes a bow main body 101, two parallel support plates 102 are disposed at one end of the bow main body 101, a clamp 8 is disposed at the other end of the bow main body, an internal threaded hole 103 is disposed on the support plates 102, the internal threaded hole 103 is used for installing the adjusting screw 2, and the clamp 8 is used for installing the dial indicator 5. The clamp body 8 comprises a cylinder 81, a fastening screw 82 is arranged on the outer wall of the cylinder 81, and a rotating handle 83 is arranged at the end part of the fastening screw 82.
The support plate 102 has a plurality of internally threaded holes 103, and the plurality of internally threaded holes 103 are linearly arranged. According to the size of the measurement target, the positions of the adjusting screw rod 2 and the dial indicator 5 are reasonably adjusted, and the application range of the arched support frame 1 can be adjusted.
Preferably, the arched support 1 is below for support by a moving rack. The mobile shelving support is a wheeled shelving or wheeled adjustable stool, or other means for supporting the arcuate support frame 1. Further avoiding the deformation of the arched support 1 caused by the self-weight.
The measurement steps are as follows:
1. installing the guide vane crank arm clamping bolt in place and screwing the nut;
2. marking a sample punching measuring point at the end part of the guide vane crank arm clamping bolt;
3. the initial value of the dial indicator 5 is adjusted to beL 1And fixed by a fixing nut;
4. taking down the measuring tool, placing the measuring tool on one side, installing a bolt tensioner, and tensioning according to given pressure;
5. tightening the clamping bolt and the clamping nut, and then detaching the bolt stretcher;
6. the measuring tool is placed at the original sample punching point again, and the reading of the dial indicator is readL 2;
7. Calculating the elongation value delta of the boltL=L 1-L 2。
The method for measuring the guide vane crank arm clamping bolt elongation value is simple to operate and accurate in result, and meanwhile, the method can be applied to measurement of other horizontally arranged bolt elongation values.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.
Claims (7)
1. The utility model provides a stator turning arm clamp bolt elongation measurement specialized tool which characterized in that: the clamping device comprises an arched support frame (1), wherein a dial indicator (5) is arranged at one end of the arched support frame (1), an adjusting screw rod (2) is arranged at the other end of the arched support frame (1), a locking nut (3) is arranged on the adjusting screw rod (2), and the adjusting screw rod (2) and the dial indicator (5) are matched to clamp a bolt (4) of a workpiece to be tested.
2. The special tool for measuring the elongation value of the guide vane crank arm clamping bolt as claimed in claim 1, wherein: the front end of the adjusting screw rod (2) is a pointed end.
3. The special tool for measuring the elongation value of the guide vane crank arm clamping bolt as claimed in claim 1, wherein: the dial indicator (5) is connected with the arched support frame (1) through a clamp body (8).
4. The special tool for measuring the elongation value of the guide vane crank arm clamping bolt as claimed in claim 3, wherein: bow-shaped support frame (1) includes bow-shaped frame main part (101), and bow-shaped frame main part (101) one end is equipped with two parallel arrangement's backup pad (102), and the other end is equipped with clamp (8), is equipped with internal thread hole (103) on backup pad (102), and internal thread hole (103) department is used for installing adjusting screw (2).
5. The special tool for measuring the elongation value of the guide vane crank arm clamping bolt as claimed in claim 4, wherein: the supporting plate (102) is provided with a plurality of internal thread holes (103), and the plurality of internal thread holes (103) are linearly arranged.
6. The special tool for measuring the elongation value of the guide vane crank arm clamping bolt as claimed in claim 1, wherein: the lower part of the arched support frame (1) is used for supporting through a movable goods shelf.
7. The special tool for measuring the elongation value of the guide vane crank arm clamping bolt as claimed in claim 4, wherein: the clamp body (8) comprises a cylinder body (81), a fastening screw (82) is arranged on the outer wall of the cylinder body (81), and a rotating handle (83) is arranged at the end part of the fastening screw (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121915625.2U CN215766799U (en) | 2021-08-16 | 2021-08-16 | Special tool for measuring extension value of guide vane crank arm clamping bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121915625.2U CN215766799U (en) | 2021-08-16 | 2021-08-16 | Special tool for measuring extension value of guide vane crank arm clamping bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215766799U true CN215766799U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121915625.2U Active CN215766799U (en) | 2021-08-16 | 2021-08-16 | Special tool for measuring extension value of guide vane crank arm clamping bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215766799U (en) |
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2021
- 2021-08-16 CN CN202121915625.2U patent/CN215766799U/en active Active
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