A kind of superhigh pressure pipeline self-reinforcing detection device

Abstract

The application provides a kind of self-reinforced detection device for ultra-high pressure pipeline, including two groups of same support device and a group of detection device;Two groups of the support device are arranged side by side, for supporting the two ends of the ultra-high pressure pipeline respectively;The detection device is set in the middle of the ultra-high pressure pipeline, for detecting the strain change of the pipeline after self-reinforced treatment;The support device includes a base and a height adjusting device;Two groups of bracket assemblies are symmetrically arranged on the upper surface of the base with respect to the vertical symmetry plane, and the height adjusting device is fixedly installed on the upper surface of the base between the two groups of bracket assemblies, for adjusting the height of the pipeline, and cooperating with the bracket assemblies to form stable support for the pipeline.The device can detect the ultra-high pressure pipeline after self-reinforced treatment.

Description

Technical Field

[0001] This invention belongs to the field of ultra-high pressure pipeline inspection technology, specifically relating to an ultra-high pressure pipeline self-reinforcing inspection device. Background Technology

[0002] Ultra-high pressure pipelines are pressure-bearing components capable of withstanding pressures of 100 MPa and above. As key equipment in fields such as petrochemicals and energy transportation, they are widely used in important applications such as high-pressure polyethylene reaction pipes and hydrogen storage and transportation pipelines. Self-reinforcing treatment of ultra-high pressure pipelines involves applying a load far exceeding the working pressure internally before commissioning, causing plastic deformation of the inner wall material while the outer wall material remains elastic. After depressurization, a beneficial residual stress field forms on the pipeline cross-section, significantly improving the pipeline's static strength and fatigue strength.

[0003] Currently, ultra-high pressure pipelines that have undergone self-reinforcing treatment generally lack dedicated strain testing devices, making it impossible to effectively determine whether their self-reinforcing treatment is qualified. Summary of the Invention

[0004] This invention proposes a self-reinforcing detection device for ultra-high pressure pipelines, which can detect ultra-high pressure pipelines after self-reinforcing treatment.

[0005] To achieve the above objectives, the present invention proposes the following technical content:

[0006] A self-reinforcing detection device for ultra-high pressure pipelines includes two sets of structurally identical support devices and a detection device.

[0007] The two sets of support devices are arranged side by side to support the two ends of the ultra-high pressure pipeline respectively; the detection device is sleeved in the middle of the ultra-high pressure pipeline to detect the strain change of the pipeline after self-reinforcing treatment.

[0008] The support device includes a base and a height adjustment device; two sets of support assemblies are fixedly arranged symmetrically about the vertical plane on the upper surface of the base, and the height adjustment device is fixedly installed on the upper surface of the base and located between the two sets of support assemblies, used to adjust the placement height of the pipe, and cooperate with the support assemblies to form a stable support for the pipe.

[0009] Furthermore, the support assembly includes a vertical pole, a blind hole, a first spring, a movable rod, and a supporting block; the vertical pole is vertically fixed to the base, the blind hole is horizontally opened on the vertical pole, the first spring and the movable rod are sequentially installed in the blind hole, the first spring is always in a compressed state to push the movable rod out of the blind hole, and the supporting block is fixedly installed on the extended end of the movable rod to support the ultra-high pressure pipeline; the height adjustment device includes two first telescopic shafts and an arc-shaped support seat; the fixed ends of the two first telescopic shafts are installed on the upper surface of the base, and the telescopic ends are fixedly connected to the arc-shaped support seat to synchronously adjust the height of the arc-shaped support seat to ensure that the supporting block is located above the center of the ultra-high pressure pipeline to be tested.

[0010] Furthermore, the detection device includes a collar and multiple strain detection components; the collar is composed of two semi-circular ring structures that are detachably connected and fitted onto the middle of the pipe; the multiple strain detection components are arranged along the inner surface of the collar;

[0011] The strain detection assembly includes a connecting sleeve, a data acquisition sleeve, a second spring, a wire sleeve, and a strain gauge. The connecting sleeve is fixedly installed on the inner wall of the collar. The data acquisition sleeve is movably engaged within the connecting sleeve via a sliding guide structure, with one end extending from the connecting sleeve being sealed. The two ends of the second spring are fixedly connected to the connecting sleeve and the data acquisition sleeve, respectively, and are always in a compressed state. The wire sleeve is fixedly installed at the end of the data acquisition sleeve located outside the connecting sleeve. The strain gauge is fixedly installed at the end of the wire sleeve away from the data acquisition sleeve, and the bottom of the strain gauge is provided with a high-strength adhesive layer for solidifying and connecting with the outer wall of the pipe. A data acquisition module for acquiring strain gauge data is installed inside the data acquisition sleeve.

[0012] Furthermore, the movable rod is slidably engaged in the blind hole via a dovetail groove-slider structure, wherein the dovetail groove does not extend to the end of the blind hole to prevent the movable rod from coming out.

[0013] Furthermore, the supporting block is made of rubber, and its surface in contact with the pipe is designed with an arc-shaped structure.

[0014] Furthermore, the two first telescopic shafts are arranged symmetrically about the plane and are driven by a synchronous motor to achieve synchronous lifting and lowering, thereby driving the arc-shaped support base and the pipeline as a whole to lift and lower.

[0015] Furthermore, the data acquisition sleeve is also equipped with a communication module and a power supply battery for transmitting the acquired data to the outside.

[0016] The beneficial effects that can be achieved by adopting the above technologies are:

[0017] 1. Equipped with a height adjustment device, which, together with the elastic support block of the support assembly, can quickly adapt to pipes of different diameters and ensures that the support block is above the center of the pipe to be inspected, thereby providing stable support for the pipe.

[0018] 2. The spring-driven strain gauge assembly has a certain radial movement capability. When the pipeline is subjected to ultra-high pressure and undergoes radial expansion, the data acquisition sleeve can slide synchronously along the connecting sleeve, and the spring is further compressed to maintain the contact pressure between the strain gauge and the pipe wall, ensuring the accurate reflection of strain data across the entire range from normal pressure to ultra-high pressure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device;

[0020] Figure 2 This is a structural schematic diagram of the first telescopic shaft and the arc-shaped support base;

[0021] Figure 3 This is a schematic diagram of the detection device consisting of a connecting sleeve and a data acquisition sleeve.

[0022] Figure 4 This is a schematic diagram of the detection device structure after removing part of the data acquisition sleeve and exposing the second spring.

[0023] 1. Base; 2. Upright pole; 3. Blind hole; 4. First spring; 5. Movable rod; 6. Support block; 7. First telescopic shaft; 8. Arc-shaped support seat; 9. Collar; 10. Connecting sleeve; 11. Data acquisition sleeve; 12. Second spring; 13. Wire sleeve; 14. Strain gauge. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figure 1 As shown, an ultra-high pressure pipeline self-reinforcing testing device includes two sets of structurally identical support devices and one testing device. During testing, the two sets of support devices are arranged side by side at both ends of the ultra-high pressure pipeline to support the pipeline ends respectively; the testing device is sleeved in the middle of the ultra-high pressure pipeline to detect the strain changes of the pipeline after self-reinforcing treatment.

[0026] The support device includes a base 1 and a height adjustment device. The base 1 has a rectangular plate-like structure, with two sets of support assemblies fixedly mounted on its upper surface. These assemblies are symmetrically arranged about a vertical plane of symmetry (referred to as plane P) along the length of the base 1; from a top-down view, the length of the base 1 is perpendicular to the parallel direction of the two sets of support devices. The support assemblies and the height adjustment device work together to ensure the stability of the ultra-high pressure pipeline during testing. The height adjustment device is fixedly installed on the upper surface of the base 1 and located between the two sets of support assemblies. It is used to adjust the placement height of the pipeline, ensuring that the support assemblies provide stable support for the pipeline.

[0027] Specifically, such as Figure 2 As shown, the support assembly includes a vertical rod 2, a blind hole 3, a first spring 4, a movable rod 5, and a retaining block 6. The vertical rod 2 is a long rod with a rectangular cross-section, its bottom vertically fixed to the upper surface of the base 1 by bolts. The blind hole 3 is horizontally formed on the vertical rod 2, with the axes of the blind holes 3 on both vertical rods 2 coinciding and located on their respective inner surfaces; from a top view, the axis of the blind hole 3 is parallel to the length direction of the base 1. The first spring 4 is installed inside the blind hole 3, its extension and contraction direction parallel to the axis of the blind hole 3, and it is always in a compressed state. The movable rod 5 is slidably engaged within the blind hole 3 via a dovetail groove-slider structure (the dovetail groove does not extend to the end of the blind hole 3), achieving sliding guidance along the axis of the blind hole 3 while effectively preventing the movable rod 5 from dislodging. One end of the first spring 4 is fixedly connected to the bottom wall of the blind hole 3, and the other end is fixedly connected to the end of the movable rod 5 located within the blind hole 3. The end of the movable rod 5 away from the first spring 4 extends out of the blind hole 3 and is fixedly fitted with a rubber retaining block 6. During testing, the two supporting blocks 6 together support the ultra-high pressure pipeline along the length of the base 1; the surface of the supporting block 6 that contacts the pipeline is designed with an arc shape to increase the contact area and ensure the stability of the support.

[0028] The height adjustment device includes two first telescopic shafts 7 and an arc-shaped support base 8. The two first telescopic shafts 7 are symmetrically arranged about the plane of symmetry P and are driven by a synchronous motor to achieve synchronous lifting and lowering. Their fixed ends are all installed on the upper surface of the base 1, and their telescopic ends are all fixedly connected to the lower surface of the arc-shaped support base 8. An arc-shaped groove is formed on the upper surface of the arc-shaped support base 8. Viewed from the perspective of the pipe end face, the arc-shaped groove is of inferior arc shape and its diameter is larger than the outer diameter of the pipe. The center of the arc-shaped groove is exactly located on the plane of symmetry P, thereby ensuring that the centerline of the ultra-high pressure pipeline is on the plane of symmetry P. By synchronously adjusting the height of the two first telescopic shafts 7, the arc-shaped support base 8 and the pipeline as a whole are lifted and lowered, so that the support block 6 with a fixed installation height can always be supported above the center height of the pipeline. By utilizing the weight of the pipeline and the cooperation of the side support block, the anti-rolling stability limit of the pipeline is achieved.

[0029] The testing device includes a collar 9 and multiple strain testing components. The collar 9 consists of two semi-circular rings, the open ends of which are detachably connected by bolts. After installation, they form a ring structure with its axis parallel to the axis of the ultra-high pressure pipeline and are fitted around the middle of the pipeline. Multiple strain testing components are installed on the inner surface of the collar 9; when not testing, the components are arranged in a circular array along the axis of the collar 9; during testing, the collar 9 provides support for the components and does not require mandatory maintenance of the circular array arrangement.

[0030] The strain gauge assembly includes a connecting sleeve 10, a data acquisition sleeve 11, a second spring 12, a wire sleeve 13, and a strain gauge 14. The connecting sleeve 10 is a circular tube, with one end fixedly mounted on the inner wall of a collar 9. During testing, its axis is radially aligned with the collar 9. The data acquisition sleeve 11 is also a circular tube, with an outer diameter slightly smaller than the inner diameter of the connecting sleeve 10. It is movably secured to the connecting sleeve 10 via a dovetail-slider structure. This design ensures that the data acquisition sleeve 11 can slide along the axis of the connecting sleeve 10 while preventing it from detaching from the connecting sleeve 10. The end of the data acquisition sleeve 11 extending beyond the connecting sleeve 10 is sealed. The two ends of the second spring 12 are located inside the connecting sleeve 10 and the data acquisition sleeve 11, respectively. Its extension and retraction direction is parallel to the sleeve axis, and it is fixedly connected to both. The conductor sleeve 13 is fixedly installed at the end of the data acquisition sleeve 11 located outside the connecting sleeve 10. The strain gauge 14 is fixedly installed at the end of the conductor sleeve 13 away from the data acquisition sleeve 11. The bottom of the strain gauge 14 is provided with a high-strength adhesive layer for curing and connecting with the outer wall of the pipe under pressure (self-curing at room temperature; after use, the strain detection component can be directly disassembled by connecting the cured part). The data acquisition sleeve 11 is equipped with a data acquisition module, a wired / wireless communication module, and a power supply battery, used to acquire the data collected by the strain gauge 14 and transmit it externally via wired / wireless means.

[0031] Detection working principle and operation procedure:

[0032] In actual testing, the ultra-high pressure pipeline is first securely erected on the support device, and then the collar 9 is closed and fitted onto the area of ​​the pipeline to be tested (usually the middle of the stress concentration area). At this time, the second spring 12 inside each strain detection component is in a compressed and energy-storing state, continuously releasing elastic force outward, pushing the data acquisition sleeve 11 and the strain gauge 14 at the end to extend radially. Thanks to the elastic pushing action of the second spring 12, the strain gauge 14 can adaptively and tightly press against the outer wall of the pipeline, effectively eliminating contact gaps caused by manufacturing tolerances or local deformation of the pipeline outer diameter. After the strain gauge 14 achieves tight contact with the pipeline surface under spring pressure, the adhesive layer at its bottom quickly undergoes a curing reaction, firmly bonding the strain gauge 14 to the pipeline measuring point. After bonding, the second spring 12 continues to maintain continuous pressure output, serving as an auxiliary support structure to prevent the strain gauge 14 from loosening or falling off due to vibration or external force during subsequent testing.

[0033] Before the pipeline undergoes self-reinforcing treatment (such as ultra-high pressure pressurization), the data acquisition module must be activated first. At this time, the pipeline is in its initial natural state without internal pressure. The system performs a "one-click zeroing" operation on the initial readings of each strain gauge 14 to eliminate any initial preload deviations that may occur during installation and establish a zero-stress reference point for strain measurement. This step ensures that all subsequent data changes accurately reflect the stress evolution of the pipeline during the self-reinforcing process.

[0034] Subsequently, a predetermined self-reinforcing pressure is applied to the ultra-high pressure pipeline (e.g., by injecting liquid into the internal cavity of the ultra-high pressure pipeline through the injection port to achieve internal self-reinforcing treatment). As the internal pressure of the pipeline continues to increase, the pipe wall material gradually undergoes elastoplastic deformation. Strain gauge 14 senses the micron-level deformation of the outer wall of the pipeline in real time and converts the strain signal into an electrical signal, which is then transmitted to the data acquisition module. The system records the dynamic strain curves of the pipeline throughout the entire process of pressurization, pressure holding, and pressure release at a high frequency. By monitoring the change in strain of the outer wall of the pipeline over time, the critical point at which the pipeline material transitions from the elastic stage to the plastic stage can be accurately captured, as well as the circumferential tensile deformation caused by the self-reinforcing treatment.

[0035] After the self-reinforcing treatment is completed and the internal pressure is completely removed, the inner wall of the pipe will generate the expected residual compressive stress, while the outer wall will generate a corresponding residual tensile stress balance. At this time, strain gauge 14 will record the final residual strain value of the pipe. By comparing the final reading after depressurization with the initial zeroing benchmark, and combining it with the mechanical property parameters of the material, the residual stress distribution of the pipe after self-reinforcing treatment can be quantitatively calculated. This not only verifies whether the self-reinforcing process has achieved the expected strengthening effect, but also effectively assesses the structural integrity of the pipe, ensuring its safety and fatigue life during future service.

[0036] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A self-reinforcing detection device for ultra-high pressure pipelines, characterized in that, It includes two sets of structurally identical support devices and one set of detection devices; The two sets of support devices are arranged side by side to support the two ends of the ultra-high pressure pipeline respectively; the detection device is sleeved in the middle of the ultra-high pressure pipeline to detect the strain change of the pipeline after self-reinforcing treatment. The support device includes a base (1) and a height adjustment device; two sets of support components are fixedly arranged symmetrically about its vertical direction on the upper surface of the base (1), and the height adjustment device is fixedly installed on the upper surface of the base (1) and located between the two sets of support components, for adjusting the placement height of the pipe, and forming a stable support for the pipe in conjunction with the support components.

2. The ultra-high pressure pipeline self-reinforcing detection device according to claim 1, characterized in that, The support assembly includes a vertical rod (2), a blind hole (3), a first spring (4), a movable rod (5), and a retaining block (6). The vertical rod (2) is vertically fixed on the base (1). The blind hole (3) is opened horizontally on the vertical rod (2). The first spring (4) and the movable rod (5) are installed in the blind hole (3) in sequence. The first spring (4) is always in a compressed state to push the movable rod (5) out of the blind hole (3). The retaining block (6) is fixedly installed on the extended end of the movable rod (5) to retain the ultra-high pressure pipeline. The height adjustment device includes two first telescopic shafts (7) and an arc-shaped support seat (8). The fixed ends of the two first telescopic shafts (7) are installed on the upper surface of the base (1), and the telescopic ends are fixedly connected to the arc-shaped support seat (8) to synchronously adjust the height of the arc-shaped support seat (8) to ensure that the retaining block (6) is located above the center of the ultra-high pressure pipeline to be tested.

3. The ultra-high pressure pipeline self-reinforcing detection device according to claim 1, characterized in that, The detection device includes a collar (9) and multiple strain detection components; the collar (9) is composed of two semi-circular ring structures that are detachably connected and fitted in the middle of the pipe; the multiple strain detection components are arranged along the inner surface of the collar (9); The strain detection assembly includes a connecting sleeve (10), a data acquisition sleeve (11), a second spring (12), a wire sleeve (13), and a strain gauge (14). The connecting sleeve (10) is fixedly installed on the inner wall of the collar (9). The data acquisition sleeve (11) is movably locked inside the connecting sleeve (10) through a sliding guide structure, and one end extending out of the connecting sleeve (10) is sealed. The two ends of the second spring (12) are fixedly connected to the connecting sleeve (10) and the data acquisition sleeve (11) respectively, and are always in a compressed state. The wire sleeve (13) is fixedly installed at the end of the data acquisition sleeve (11) located outside the connecting sleeve (10). The strain gauge (14) is fixedly installed at the end of the wire sleeve (13) away from the data acquisition sleeve (11), and the bottom of the strain gauge (14) is provided with a high-strength adhesive layer for solidifying and connecting with the outer wall of the pipe. A data acquisition module for acquiring data from the strain gauge (14) is installed inside the data acquisition sleeve (11).

4. The ultra-high pressure pipeline self-reinforcing detection device according to claim 2, characterized in that, The movable rod (5) is slidably engaged in the blind hole (3) through a dovetail groove-slider structure. The dovetail groove does not extend to the end of the blind hole (3) to prevent the movable rod (5) from coming out.

5. The ultra-high pressure pipeline self-reinforcing detection device according to claim 2, characterized in that, The abutment block (6) is made of rubber, and its surface in contact with the pipe is designed with an arc-shaped structure.

6. The ultra-high pressure pipeline self-reinforcing detection device according to claim 2, characterized in that, The two first telescopic shafts (7) are arranged symmetrically about the symmetrical plane and are driven by a synchronous motor to achieve synchronous lifting and lowering, so as to drive the arc support base (8) and the pipeline as a whole to lift and lower.

7. The ultra-high pressure pipeline self-reinforcing detection device according to claim 3, characterized in that, The data acquisition sleeve (11) is also equipped with a communication module and a power supply battery, which are used to transmit the acquired data to the outside.

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