Pipeline clamp for vibration measurement
A pipeline clamp including a clamp assembly adapted to attach to an outer surface of a pipeline and a protruding member having a first end portion attached to a surface of the clamp assembly and a second end portion extended away from the clamp assembly. The second end portion is configured to accommodate a sensor and the pipeline clamp has a natural frequency equal to or greater than a maximum expected vibration frequency of the pipeline.
1. A pipeline clamp comprising:
a clamp assembly adapted to attach to an outer surface of a pipeline; and
a unitary protruding member having a first end portion attached to a surface of the clamp assembly and a second end portion extended away from the clamp assembly, wherein the second end portion is configured to accommodate a vibration sensor, and wherein the protruding member includes:
a plurality of steps, wherein one or more of the steps at the first end portion of the protruding member are solid with no hollow portion and one or more of the steps at the second end of the protruding member include a hollow portion,
wherein the pipeline clamp has a natural frequency equal to or greater than a maximum expected vibration frequency of the pipeline.
2. The pipeline clamp of claim 1 , wherein the maximum expected vibration frequency of the pipeline is about 1 kHz.
3. The pipeline clamp of claim 1 , wherein a cross-sectional area of the protruding member decreases between the first end portion and the second end portion.
4. The pipe line clamp of claim 3 , wherein reach steps of the protruding member has a smaller cross-sectional area than steps disposed closer to the first end portion of the protruding member.
5. The pipeline clamp of claim 1 , wherein the hollow portion includes a first hollow portion which extends in a direction from the second end portion towards the first end portion.
6. The pipeline clamp of claim 5 , wherein the hollow portion includes a second hollow portion substantially perpendicular to the first hollow portion.
7. The pipeline clamp of claim 1 , wherein the clamp assembly comprises:
a first clamp member adapted to conform to a first portion of an outer circumference of the pipeline; and
a second clamp member adapted to conform to a second portion of the outer circumference of the pipeline,
wherein the first clamp member is adapted to attach to the second clamp member so as to attach the clamp assembly to the pipeline, and the protruding member is attached to one of the first clamp member and the second clamp member.
8. The pipeline clamp of claim 7 , wherein the first clamp member includes a first flange and the second clamp member includes a second flange corresponding to the first flange, wherein the first clamp member and the second clamp member are attached by fastening the first flange and the second flange to each other with one or more fasteners.
9. The pipeline clamp of claim 8 , wherein the first clamp member includes a first gusset attached to the first flange and the second clamp member includes a second gusset attached to the second flange.
10. A pipeline testing device comprising:
a vibration sensor; and
a pipeline clamp comprising:
a clamp assembly adapted to attach to an outer surface of a pipeline; and
a unitary protruding member having a first end portion attached to a surface of the clamp assembly and a second end portion extended away from the clamp assembly, wherein the vibration sensor is disposed on the second end portion of the protruding member, and wherein the protruding member includes:
a plurality of steps, wherein one or more of the steps at the first end portion of the protruding member are solid with no hollow portion, and one or more of the steps at the second end of the protruding member include a hollow portion, and
wherein the pipeline clamp has a natural frequency equal to or greater than a maximum expected vibration frequency of the pipeline.
11. The pipeline testing device of claim 10 , wherein the maximum expected vibration frequency of the pipeline is about 1 kHz.
12. The pipeline clamp of claim 10 , wherein a cross-sectional area of the protruding member decreases between the first end portion and the second end portion.
13. The pipe line clamp of claim 12 , wherein reach steps of the protruding member has a smaller cross-sectional area than steps disposed closer to the first end portion of the protruding member.
14. The pipeline clamp of claim 10 , wherein the hollow portion includes a first hollow portion which extends in a direction from the second end portion towards the first end portion.
15. The pipeline clamp of claim 14 , wherein the hollow portion includes a second hollow portion substantially perpendicular to the first hollow portion.
16. The pipeline clamp of claim 10 , wherein the clamp assembly comprises:
a first clamp member adapted to conform to a first portion of an outer circumference of the pipeline; and
a second clamp member adapted to conform to a second portion of the outer circumference of the pipeline,
wherein the first clamp member is adapted to attach to the second clamp member so as to attach the clamp assembly to the pipeline and the protruding member is attached to one of the first clamp member and the second clamp member.
17. The pipeline clamp of claim 16 , wherein the first clamp member includes a first flange and the second clamp member includes a second flange corresponding to the first flange, wherein the first clamp member and the second clamp member are attached by fastening the first flange and the second flange to each other with one or more fasteners.
18. The pipeline clamp of claim 17 , wherein the first clamp member includes a first gusset attached to the first flange and the second clamp member includes a second gusset attached to the second flange.