Device for detecting deformation of flexible expansion joint
By designing a device that connects a magnetic universal base to a universal connecting rod and a dial indicator, the problem of excessive local stress in flexible expansion joints caused by thermal expansion and contraction is solved, and rapid and accurate detection of flexible expansion joints is achieved, ensuring the safety and stability of the pipeline system.
Patent Information
- Application Number
- CN202422036529.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-08-22
AI Technical Summary
In marine engineering, flexible expansion joints may experience excessive local stress due to thermal expansion and contraction caused by temperature changes or sudden accidents, which may shorten their service life and pose a risk of leakage. There is a lack of effective deformation monitoring devices.
A device is designed to connect the universal connecting rod and dial indicator through a magnetic universal base to measure the axial compression, axial tension and lateral displacement of the flexible expansion joint. The L-shaped support structure and reinforced diagonal support are used to ensure measurement accuracy, and studs and nuts are used for convenient installation.
It realizes the rapid and accurate detection of flexible expansion joints, provides necessary detection data, ensures the safety and stability of the pipeline system, and has the characteristics of simple structure and convenient operation.
Smart Images
Figure CN223361347U_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of ship construction and design, and particularly relates to a device for detecting deformation of a flexible expansion joint. Background Art
[0002] In the field of offshore engineering, single-point mooring systems are a typical example of oil transmission equipment. Within single-point pipeline systems, thermal expansion and contraction due to temperature fluctuations, or other unexpected events, can cause excessive localized stress on the pipeline structure. This can shorten its service life over time and pose a risk of leakage. To mitigate this, flexible expansion joints are appropriately positioned during design to allow the entire pipeline system to deform to a certain degree, relieving the stress. To monitor this deformation, a device is required to measure and record the deformation of the flexible expansion joints, allowing for assessment of the safety and stability of the equipment's operation. Summary of the Invention
[0003] In order to solve the above problems, the present invention provides a device for detecting deformation of a flexible expansion joint, which aims to achieve the purpose of measuring axial compression, axial tension and lateral displacement of the flexible expansion joint. The technical solution adopted is:
[0004] A device for detecting deformation of a flexible expansion joint, wherein both ends of the flexible expansion joint are connected to a pipeline through a first flange and a second flange respectively, reinforcing semicircular rings are fixed to the inner sides of the first flange and the second flange, an L-shaped support structure is fixed to the first flange by bolts, a magnetic universal base is provided at the end of the support structure, the magnetic universal base has a universal connecting rod, a dial indicator is fixed to the end of the universal connecting rod, and the thimble of the dial indicator is in contact with the second flange and the annular outer surface of the reinforcing semicircular ring.
[0005] The above-mentioned device for detecting deformation of a flexible expansion joint further comprises: a reinforced oblique support provided on the L-shaped support structure, and the reinforced oblique support is provided at a corner of the support structure.
[0006] The above-mentioned device for detecting deformation of a flexible expansion joint can be further characterized in that the universal connecting rod can be folded in any direction to form multiple folds.
[0007] The above-mentioned device for detecting deformation of a flexible expansion joint can be further characterized in that the bolts are double-headed studs and nuts.
[0008] The above-mentioned device for detecting deformation of a flexible expansion joint can further have a short side of the L-shaped support structure connected to the first flange, and a long side parallel to the pipeline.
[0009] The above-mentioned device for detecting deformation of a flexible expansion joint can be further equipped with four or more detection devices for each flexible expansion joint.
[0010] The present invention can conveniently and quickly detect the axial compression, axial stretching, and lateral displacement of the flexible expansion joint, provide necessary detection data for the pipeline system where the flexible expansion joint is located, ensure the transportation safety of the pipeline system, and has the characteristics of simple structure, convenient use, and easy installation and operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic structural diagram of the present invention;
[0012] Figure 2 It is a schematic diagram of axial compression of the present invention;
[0013] Figure 3 This is a schematic diagram of axial stretching of the present invention;
[0014] Figure 4 It is a schematic diagram of lateral displacement of the present invention;
[0015] Among them, 5-flexible expansion joint, 6-first flange, 7-second flange, 8-bolt, 10-support structure, 11-universal base, 12-dial indicator, 13-reinforced semicircular ring, 14-reinforced oblique support. DETAILED DESCRIPTION
[0016] The present invention will be further described with reference to the accompanying drawings.
[0017] like Figure 1 A device for detecting deformation of a flexible expansion joint is shown. The ends of the flexible expansion joint are connected to the pipeline via a first flange and a second flange, respectively. Reinforcement semicircular rings are fixed to the inner sides of the first and second flanges. An L-shaped support structure is bolted to the first flange. The L-shaped support structure is provided with reinforced diagonal supports, located at the corners of the support structure. The bolts are studs and nuts. A magnetic universal base is provided at the end of the support structure. This base has a universal connecting rod, and a dial indicator is fixed to the end of the universal connecting rod. The universal connecting rod can be folded in any direction, forming multiple folds. The dial indicator's ejector pin contacts the outer annular surface of the second flange and the reinforcing semicircular ring.
[0018] like Figure 2 As shown, the detection device can measure the axial compressive displacement of a flexible expansion joint. Adjust the universal connecting rod of the magnetic universal base so that the needle of the dial indicator contacts the outside of the reinforcing semicircular ring. Record the initial dial indicator reading. When the flexible expansion joint is deformed and compressed by an external force, the reinforcing semicircular ring connected to it will also undergo axial displacement, causing the needle of the dial indicator to compress. Record the final dial indicator reading. Subtract the initial dial indicator reading from the final dial indicator reading to obtain the axial compressive displacement of the flexible expansion joint.
[0019] like Figure 3 As shown, the detection device can measure the axial tensile displacement of a flexible expansion joint. Adjust the universal connecting rod of the magnetic universal base so that the needle of the dial indicator contacts the outside of the second flange. Record the initial dial indicator reading. When the flexible expansion joint is deformed and stretched by an external force, the second flange connected to it will also undergo axial displacement, causing the needle of the dial indicator to compress. Record the final dial indicator reading. Subtract the initial dial indicator reading from the final dial indicator reading to obtain the axial tensile displacement of the flexible expansion joint.
[0020] like Figure 4 As shown, the detection device can measure the lateral displacement of a flexible expansion joint. Adjust the universal connecting rod of the magnetic universal base so that the needle of the dial indicator contacts the annular surface of the second flange. Record the initial dial indicator reading. When the flexible expansion joint is laterally deformed by an external force, the attached second flange will also undergo lateral displacement, causing the needle of the dial indicator to compress. Record the final dial indicator reading. Subtract the initial dial indicator reading from the final dial indicator reading to obtain the lateral displacement of the flexible expansion joint.
[0021] Install at least 4 sets of the detection device on each flexible expansion joint, take the average value of the measured data, and the final data will be more reasonable.
[0022] The following table shows a project example. Four sets of the test device were installed on the flexible expansion joint to be measured, and the average of the measured data was taken as the final measurement data.
[0023] Tensile / mm Compression / mm Twist / mm Remark Table 1 +3 -2 +2 Table 2 +4 -3 +1 Table 3 +2 -2 +2 Table 4 +4 -3 +1 average value +3.25 -2.5 +1.5 Theoretical allowable value +10 -10 ±10 .
Claims
1. A device for detecting deformation of a flexible expansion joint, characterized in that: The two ends of the flexible expansion joint (5) are connected to the pipeline through a first flange (6) and a second flange (7), respectively. A reinforcing semicircular ring (13) is fixed on the inner side of the first flange and the second flange. The L-shaped support structure (10) is fixed to the first flange through bolts (8). A magnetic universal base (11) is provided at the end of the support structure. The magnetic universal base has a universal connecting rod. A dial indicator (12) is fixed at the end of the universal connecting rod. The thimble of the dial indicator contacts the annular outer surface of the second flange and the reinforcing semicircular ring.
2. The device for detecting deformation of a flexible expansion joint according to claim 1, characterized in that: The L-shaped support structure is provided with a reinforced oblique support (14), which is arranged at a corner of the support structure.
3. The device for detecting deformation of a flexible expansion joint according to claim 1, characterized in that: The universal connecting rod can be folded in any direction to form multiple folds.
4. The device for detecting deformation of a flexible expansion joint according to claim 1, characterized in that: The bolts use double-ended studs and nuts.
5. The device for detecting deformation of a flexible expansion joint according to claim 1, characterized in that: The short side of the L-shaped support structure is connected to the first flange, and the long side is parallel to the pipeline.
6. The device for detecting deformation of a flexible expansion joint according to claim 1, characterized in that: Each flexible expansion joint is installed with 4 or more sets of detection devices.