CN-224230888-U - Measuring device for bolt stretching

CN224230888UCN 224230888 UCN224230888 UCN 224230888UCN-224230888-U

Abstract

The utility model discloses a measuring device for bolt stretching, which comprises a bracket component, a clamping component, a first mounting part, a first length measuring component, a second mounting part and a second length measuring component. One end of the clamping assembly is connected to the bracket assembly, the other end of the clamping assembly is used for being detachably connected to the flange, one end of the first installation part is connected to the bracket assembly, the first length measuring assembly is installed at one end, far away from the bracket assembly, of the first installation part and used for measuring the length variation of the bolt, one end of the second installation part is connected to the bracket assembly, and the second length measuring assembly is installed at one end, far away from the bracket assembly, of the second installation part and used for measuring the length variation of the bolt. The measuring device for bolt stretching can monitor the elongation of the bolt in the stretching process in real time, so that an operator can dynamically adjust the hydraulic pressure of the stretcher according to the target pretightening force requirement.

Inventors

Lv Shenlong
LI TIANBIN
DONG FUDI
LI YANG
WANG ZHIPENG
ZHAO ZHENGHUA
YANG SHENPENG
LU XINING

Assignees

上海电气凯士比核电泵阀有限公司

Dates

Publication Date: 20260512
Application Date: 20250603

Claims (9)

1. A measuring device for bolt stretching, the measuring device comprising: a bracket assembly; one end of the clamping assembly is connected with the bracket assembly, and the other end of the clamping assembly is used for being detachably connected with the flange; the first length measuring assembly is arranged at one end of the first mounting part far away from the bracket assembly and is used for measuring the length variation of the bolt; the second installation part and the second length measurement assembly are connected with the bracket assembly at one end, the second length measurement assembly is installed at one end, far away from the bracket assembly, of the second installation part, and the second length measurement assembly is used for measuring the length variation of the bolt; The first installation part, the clamping assembly and the second installation part are sequentially arranged on the bracket assembly.
2. The measuring device for bolt tensioning according to claim 1, wherein the first length measuring assembly and the second length measuring assembly each comprise a displacement measuring instrument.
3. The measuring device for bolt tensioning according to claim 2, wherein the displacement measuring instrument comprises a mechanical dial indicator.
4. The measuring device for bolt stretching according to claim 1, wherein the clamping assembly comprises a first clamping part and a second clamping part, one ends of the first clamping part and the second clamping part are respectively sleeved on the bracket assembly, and the first clamping part and the second clamping part can move along the axial direction of the bracket assembly to adjust the distance between the first clamping part and the second clamping part.
5. The measuring apparatus for bolt tensioning according to claim 4, wherein the first clamping portion comprises two first clamping arms extending away from the bracket assembly, respectively, and the second clamping portion comprises two second clamping arms extending away from the bracket assembly, respectively.
6. The measuring device for bolt tensioning according to claim 4, further comprising a first locking assembly for locking the first clamping portion and the bracket assembly and a second locking assembly for locking the second clamping portion and the bracket assembly.
7. The measuring device for bolt tensioning according to claim 6, wherein the bracket assembly comprises a threaded rod having an external thread, the first locking assembly comprises a plurality of nuts respectively threadedly engaged with the bracket assembly to lock the first clamping portion, and the second locking assembly comprises a plurality of nuts respectively threadedly engaged with the bracket assembly to lock the second clamping portion.
8. The measuring device for bolt tensioning according to claim 1, further comprising a third locking assembly for locking the first mounting portion and the bracket assembly and a fourth locking assembly for locking the second mounting portion and the bracket assembly.
9. The measuring device for bolt tensioning according to claim 8 wherein the bracket assembly comprises a threaded rod having an external thread, the third locking assembly comprises a plurality of nuts that respectively threadedly engage the bracket assembly to lock the first mounting portion, and the fourth locking assembly comprises a plurality of nuts that respectively threadedly engage the bracket assembly to lock the second mounting portion.

Description

Measuring device for bolt stretching Technical Field The utility model relates to a measuring device for bolt stretching. Background In the prior art, for parts connected by two flanges, fastening between the two flanges is generally achieved by a set of bolts and nuts uniformly distributed along the circumference of the flanges. In order to improve the pretightening force of the bolts on the flange, a bolt stretcher is used for stretching and pretightening the bolts. In order to secure the pretensioning effect of the bolt, it is necessary to measure the tensile elongation of the bolt after the completion of the stretching. Specifically, after the stretcher is unloaded, an operator needs to detect the actual elongation of the bolt by means of an external length measuring tool (such as a caliper, a micrometer, etc.), so as to verify whether the pretightening force meets the requirement. However, the measurement mode has the problems of complicated operation, low efficiency and the like, particularly under the condition of limited space or batch assembly, the measurement mode in the prior art not only can increase the operation time, but also has larger measurement error due to measurement after the stretcher is unloaded, thereby influencing the reliability of the connecting structure. The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. Disclosure of utility model The utility model aims to provide a measuring device for bolt stretching, which has the advantage of being capable of measuring in real time in the bolt stretching process. To achieve the above object, the present utility model provides a measuring device for bolt stretching, comprising: a bracket assembly; one end of the clamping assembly is connected with the bracket assembly, and the other end of the clamping assembly is used for being detachably connected with the flange; the first length measuring assembly is arranged at one end of the first mounting part far away from the bracket assembly and is used for measuring the length variation of the bolt; the second installation part and the second length measurement assembly are connected with the bracket assembly at one end, the second length measurement assembly is installed at one end, far away from the bracket assembly, of the second installation part, and the second length measurement assembly is used for measuring the length variation of the bolt; The first installation part, the clamping assembly and the second installation part are sequentially arranged on the bracket assembly. Optionally, the first length measurement assembly and the second length measurement assembly each comprise a displacement measurement instrument. Optionally, the displacement measuring instrument comprises a mechanical dial indicator. Optionally, the clamping assembly includes a first clamping portion and a second clamping portion, one ends of the first clamping portion and the second clamping portion are respectively sleeved on the bracket assembly, and the first clamping portion and the second clamping portion can move along an axial direction of the bracket assembly to adjust a distance between the first clamping portion and the second clamping portion. Optionally, the first clamping part comprises two first clamping arms, the two first clamping arms extend from the bracket assembly to a direction away from the bracket assembly respectively, and the second clamping part comprises two second clamping arms, and the two second clamping arms extend from the bracket assembly to a direction away from the bracket assembly respectively. Optionally, the measuring device further comprises a first locking component and a second locking component, wherein the first locking component is used for locking the first clamping part and the bracket component, and the second locking component is used for locking the second clamping part and the bracket component. Optionally, the bracket assembly comprises a threaded rod with external threads, the first locking assembly comprises a plurality of nuts which are respectively in threaded fit with the bracket assembly to lock the first clamping part, and the second locking assembly comprises a plurality of nuts which are respectively in threaded fit with the bracket assembly to lock the second clamping part. Optionally, the measuring device further comprises a third locking component and a fourth locking component, wherein the third locking component is used for locking the first mounting part and the bracket component, and the fourth locking component is used for locking the second mounting part and the bracket component. Optionally, the bracket assembly comprises a threaded rod with external threads, the third locking assembly comprises a plurality of nuts which are respectively in threaded fit with the bracket assembly to lock the first mounting part, and the fourth locking assembly comprises a plurali