Movable lifting device and method for tensile test of flexible pipe cables with different calibers

Abstract

The invention discloses a movable lifting device and method for tensile testing of flexible pipe cables with different calibers, and belongs to the technical field of experimental testing of flexible pipe cable equipment, the movable lifting device is used for supporting the bending and sinking position of a pipeline, and the movable lifting device is characterized in that double sliding rails are arranged on a testing platform; the bottom moving assembly is movably arranged on the double sliding rails and is used for horizontally moving on the test platform; the lifting assembly is movably arranged on the bottom moving assembly, the moving direction of the lifting assembly is perpendicular to the moving direction of the bottom moving assembly, and the lifting assembly is used for accurately controlling the relative position of the supporting direction and the pipe body and the lifting height. The flexible supporting cushion blocks are placed on the lifting assembly in an overlapped mode and used for providing auxiliary supporting for the pipe body. According to the invention, a flexible and reliable pipe cable structure supporting function can be provided for the tensile test of flexible pipe cables with different calibers and lengths, and the applicability is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of experimental testing of flexible pipe and cable equipment, and particularly relates to a movable lifting device and method for tensile testing of flexible pipes and cables with different diameters. Background Art

[0002] Offshore oil and gas exploitation in China has gradually developed and been applied from offshore areas to deep - sea areas. The harsh and complex deep - sea environment with changeable climate has put forward higher requirements for the service performance of various offshore oil and gas exploitation equipment. Marine flexible pipes, umbilical cables, and submarine cables are key equipment indispensable in the development and utilization of marine oil and gas resources, playing an important role in oil and gas resource transportation and energy supply. The experimental testing of flexible pipes and cables is an effective technical means to verify the mechanical performance indicators of the pipes and cables, which helps to analyze the mechanical behavior mechanism of the pipe and cable structure and promote the localization process of the research, development, and manufacturing of flexible pipe and cable equipment. During the service process of the flexible pipe and cable structure in the deep - water environment, it needs to bear different tensile forces. Therefore, it is necessary to carry out tensile experimental testing on flexible pipes and cables, simulate the load conditions in actual operations, verify the anti - tensile performance of the pipe and cable structure, and master the experimental testing technology of flexible pipes and cables.

[0003] For the tensile testing of flexible pipes and cables, according to relevant international specifications, the pipe body structure is fixed and a force is applied. In order to prevent the pipe body structure from bending and deforming due to its own weight and the weight of the internal transport medium, it is necessary to carry out functional and structural design on the horizontal support device of the large - span flexible pipe and cable structure on the test platform. Therefore, the purpose of this patent is to develop a movable lifting device suitable for tensile testing of flexible pipes and cables with different diameters and a corresponding horizontal support method.

[0004] Regarding the support method of the pipe body structure in the tensile testing of flexible pipes and cables, generally, a lifting belt made of aramid material is used to lift the middle position of the pipe body, or gaskets are placed at the parts that need to be supported to play a supporting role. However, the above two support methods have the following disadvantages:

[0005] (1) Through the lifting support method, only the support effect in the vertical plane can be guaranteed, and the freedom - degree constraint effect in the horizontal plane cannot be achieved. Lifting has a certain degree of danger.

[0006] (2) Through the gasket support method, a certain resistance effect will be formed on the pipe body structure during the tensile loading and unloading process, and the gaskets need to be frequently replaced when testing pipe and cable structures with different diameters. Summary of the Invention

[0007] In order to solve the above problems, the present invention adopts the following technical solutions:

[0008] A movable lifting device for tensile testing of flexible pipes and cables with different diameters. The movable lifting device is used to support the position where the pipe bends and sinks, and it includes:

[0009] A double slide rail, which is arranged on the test platform;

[0010] A bottom moving component, which is movably arranged on the double slide rail and is used for horizontal movement on the test platform;

[0011] A lifting component, which is movably arranged on the bottom moving component, and the moving direction of the lifting component is perpendicular to the moving direction of the bottom moving component, and is used for precisely controlling the relative position between the supporting direction and the pipe body and the lifting height;

[0012] At least one flexible supporting cushion block, which is stacked on the lifting component and is used for providing auxiliary support for the pipe body.

[0013] Further, the lifting component and the bottom moving component are connected and fixed through a fixing member.

[0014] Further, the bottom moving component includes:

[0015] A bottom plate support steel plate, which is located on the upper side of the double slide rail, the length of the bottom plate support steel plate matches the distance between the double slide rails, and the lifting component is movably arranged on the bottom plate support steel plate;

[0016] A plurality of rollers, which are symmetrically arranged on both sides of the bottom plate support steel plate and are correspondingly arranged with the double slide rail, and the plurality of rollers roll in the corresponding slide rails respectively.

[0017] Further, the lifting component includes:

[0018] A lifting bottom plate, which is movably arranged on the bottom plate support steel plate and is connected and fixed through a bolt and nut connecting member;

[0019] A plurality of positioning card slot groups, which are arranged at intervals along the extending direction of the double slide rail on the lifting bottom plate, and each positioning card slot group includes 4 symmetrically arranged positioning card slots;

[0020] A plurality of support modules, which are correspondingly arranged with the plurality of positioning card slot groups, and the support modules are placed in the corresponding positioning card slot groups;

[0021] A plurality of hydraulic jack groups, which are correspondingly arranged with the plurality of support modules, each hydraulic jack group includes two symmetrically arranged hydraulic jacks, the fixed end of the hydraulic jack is fixedly connected with the lifting bottom plate, and the driving end is fixedly connected with the support module.

[0022] Further, a center line scale is provided on one side of the bottom plate support steel plate, which is perpendicularly arranged to the double slide rails, and pointer scale lines are provided at the center positions of the support modules on the side close to the center line scale.

[0023] Further, vertical scale rulers are provided on each of the positioning card slots, and scale lines are provided at the matching positions of the two ends of the support module with the positioning card slots.

[0024] Further, an arc-shaped groove is provided at the top of the support module, and the flexible support cushion block is matched with the arc-shaped groove.

[0025] Further, the arc-shaped groove is a circular arc-shaped groove.

[0026] A method for tensile testing of flexible pipe cables with different diameters adopts the movable lifting device for tensile testing of flexible pipe cables with different diameters described in any one of the above, and the method includes the following steps:

[0027] S10. Determine the middle section position of the sample pipe according to the length of the test sample pipe. Before placing the sample pipe on the test platform, move the movable lifting device to the middle section support position of the sample pipe on the test platform through the rollers.

[0028] S20. Keep the arc-shaped groove support module, the fixed end of the test platform, and the actuator end in a straight line by adjusting the bolt-nut connection member.

[0029] S30. Lift the sample pipe, fix one end on the test platform, connect the other end to the actuator through a flange, measure the vertical distance between the outermost layer of the sample pipe and the lifting assembly, and combine with the scale line of the support module to vertically lift the support module to the outer surface of the sample pipe through the hydraulic jack to play a supporting role.

[0030] Beneficial effects: The present invention adopts the cooperation of rollers and slide rails to realize the movability of the movable lifting device, and can be applicable to sample pipe specimens with different lengths.

[0031] The present invention adopts four hydraulic jacks and an arc-shaped groove support module with scale lines, which has sufficient supporting force and can accurately control the vertical lifting displacement.

[0032] The present invention adopts an arc-shaped groove support module and flexible support gaskets with different thicknesses, which can provide lifting support for flexible pipe cable structures with different diameters, enabling the test platform to be compatible with test sample pipes of various diameter specifications and having good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of the movable lifting device for tensile testing of flexible pipe cables with different diameters according to the present invention;

[0034] Figure 2 It is a schematic structural view of the bottom moving component of the present invention;

[0035] Figure 3 It is a schematic structural view of the upper lifting component of the present invention;

[0036] Figure 4 It is a schematic structural view of the flexible gasket of the present invention.

[0037] Wherein, 1. Double slide rails; 2. Flexible support pads; 3. Bottom plate support steel plates; 4. Rollers; 5. Center line scale rulers; 6. Pointer scale lines; 7. Lifting bottom plates; 8. Support modules; 9. Hydraulic jacks; 10. Vertical scale rulers; 11. Positioning card slots. Detailed implementation manners

[0038] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0039] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to visually and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0040] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0042] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0043] Embodiment 1

[0044] Reference Figures 1-4 , a device for tensile testing of flexible pipe cables with different calibers, including a test platform and an actuator, further including a lifting mechanism, and the lifting mechanism is used to support the bending and sinking position of the pipeline.

[0045] The present invention can adjust the size of the support surface according to flexible pipe cables with different calibers, and can move and lift the support in the double slide rail 1 groove of the test platform according to the bending position of the pipe body structure.

[0046] In this embodiment, the lifting mechanism includes:

[0047] Double slide rail 1, and the double slide rail 1 is arranged on the test platform;

[0048] Bottom moving assembly, the bottom moving assembly is movably arranged on the double slide rail 1, and the bottom moving assembly is used for horizontal movement on the test platform;

[0049] Lifting assembly, the lifting assembly is movably arranged on the bottom moving assembly, and the moving direction of the lifting assembly is perpendicular to the moving direction of the bottom moving assembly, and is used to accurately control the relative position of the support direction and the pipe body and the lifting height;

[0050] At least one flexible support cushion block 2, and the flexible support cushion blocks 2 are stacked on the lifting assembly and used for providing auxiliary support.

[0051] In this embodiment, the flexible support cushion blocks 2 can be replaced and stacked according to the pipe body structures with different calibers to provide an auxiliary support function.

[0052] The present invention uses rollers 4 and slide rails to realize the mobility of the device and can be applicable to sample pipe specimens with different lengths;

[0053] The present invention uses a support module 8 and flexible support gaskets with different thicknesses to be able to provide a lifting support function for flexible pipe cable structures with different calibers, so that the test platform can be compatible with test sample pipes of various caliber specifications and has good applicability.

[0054] In this embodiment, the lifting assembly and the bottom moving assembly are connected and fixed by fixing parts.

[0055] In this embodiment, the bottom moving assembly includes:

[0056] Bottom plate support steel plate 3, the bottom plate support steel plate 3 is located on the upper side of the double slide rail 1, the length of the bottom plate support steel plate 3 matches the distance between the double slide rails 1, and the lifting assembly is movably arranged on the bottom plate support steel plate 3;

[0057] During specific implementation, the bottom support steel plate is formed by welding four I-beams with the same length and upper and lower flat steel plates into a rectangular plane. The length of the bottom support steel plate matches the distance between the double rails 1 of the test platform, and the rollers 4 can roll in the grooves of each rail.

[0058] A plurality of rollers 4 are symmetrically arranged on both sides of the bottom plate support steel plate 3 and are correspondingly arranged with the double rails 1. The plurality of rollers 4 roll in the corresponding rails respectively.

[0059] Preferably, there are 4 rollers 4, and the 4 rollers 4 are symmetrically arranged on both sides of the bottom plate support steel plate 3.

[0060] In this embodiment, the lifting assembly includes:

[0061] A lifting bottom plate 7, which is movably arranged on the bottom plate support steel plate 3 and is connected and fixed by a bolt and nut connecting member;

[0062] During specific implementation, a nut is welded on both the bottom plate support steel plate 3 and the lifting bottom plate 7. The two nuts are correspondingly arranged, and the position of the lifting bottom plate 7 on the bottom plate support steel plate 3 is adjusted and fixed by bolts.

[0063] A plurality of positioning card slot groups, which are arranged at intervals along the extending direction of the double rails on the lifting bottom plate. Each positioning card slot group includes 4 symmetrically arranged positioning card slots 11;

[0064] A plurality of support modules 8, which are correspondingly arranged with the plurality of positioning card slot groups, and the support modules 8 are placed in the corresponding positioning card slot groups;

[0065] A plurality of hydraulic jack groups, which are correspondingly arranged with the plurality of support modules 8. Each hydraulic jack group includes two symmetrically arranged hydraulic jacks 9. The fixed end of the hydraulic jack 9 is fixedly connected to the lifting bottom plate 7, and the driving end is fixedly connected to the support module 8.

[0066] Preferably, there are 2 groups of hydraulic jacks 9 and support modules 8, a total of 4 hydraulic jacks 9.

[0067] In this embodiment, a center line scale 5 is arranged on one side of the bottom plate support steel plate 3 and is perpendicular to the double rails 1. A pointer scale line 6 is arranged at the center position of the support module 8 close to the center line scale 5.

[0068] In this embodiment, a vertical scale 10 is arranged on each positioning card slot 11, and scale lines are arranged at the matching positions of both ends of the support module 8 and the positioning card slot 11.

[0069] In this embodiment, the vertical scale ruler 10 is used to accurately control the vertical lifting displacement. There are scale lines at the matching positions of both ends of each support module with the positioning card slot 11, which can accurately control the lifting displacement.

[0070] The present invention adopts four hydraulic jacks 9 and arc-shaped groove support modules 8, which have sufficient supporting force and can accurately control the vertical lifting displacement.

[0071] In this embodiment, the device can move within the double slide rails 1 of the test platform according to the length of the sample pipe to achieve accurate positioning of the support position. The four hydraulic jacks 9 equipped in the device can provide sufficient supporting force to avoid test errors of the sample pipe in the tensile test caused by the bending phenomenon of the middle section of the large-span sample pipe when placed horizontally.

[0072] Through the two support modules 8, the device can also effectively limit other displacement conditions of the pipe body structure during the stretching process except for the axial displacement and radial shrinkage displacement forms.

[0073] In this embodiment, an arc-shaped groove is provided at the top of the support module 8, and the flexible support pad 2 matches the arc-shaped groove.

[0074] During specific implementation, the flexible support pad 2 is placed between the arc-shaped groove support module 8 and the pipe body structure to play a buffering and supporting role.

[0075] In this embodiment, the arc-shaped groove is a circular arc-shaped groove.

[0076] Embodiment 2

[0077] This embodiment is a method for using a device for tensile testing of flexible pipe cables with different diameters. The device for tensile testing of flexible pipe cables with different diameters in the above Embodiment 1 is adopted, and the method includes the following steps:

[0078] S10. According to the length of the test sample pipe, determine the middle section position of the sample pipe. Before the sample pipe is placed on the test platform, move the movable lifting device to the middle section support of the sample pipe on the test platform through the rollers 4.

[0079] In specific implementation, after determining the diameter and pipeline length of the flexible pipe cable to be tested, both ends of the pipeline are respectively installed at the fixed end and the force application end of the test platform. Measure the pipeline length and determine the center position of the pipeline. Observe the bending and sinking position of the middle section of the pipeline under the condition of no support. According to the position of the pipeline bending and sinking section relative to the double slide rails 1 of the test platform, move the movable lifting device to directly below the obvious bending and sinking section of the pipe body structure through the rollers 4; move the center of the arc-shaped groove support module 8 of the upper lifting assembly perpendicular to the slide rail direction by rotating the bolt in the upper lifting assembly. According to the pointer scale line 6 on the bottom plate support steel plate 3 of the bottom moving assembly cooperating with the center line scale ruler 5, make it located exactly in the middle between the two slide rails;

[0080] S20. By adjusting the bolt nut connection member, keep the arc-shaped groove support module 8, the fixed end of the test platform and the actuator end in a straight line;

[0081] In specific implementation, fix the position of the upper lifting assembly through the connection structure composed of bolts and nuts. At this time, the movement operation of the device has been completed;

[0082] S30. Lift the sample pipe, fix one end on the test platform, and connect the other end to the actuator through a flange. Measure the vertical distance between the outermost layer of the sample pipe and the lifting assembly. Combine with the scale line of the support module 8, and vertically lift the support module to the outer surface of the sample pipe through the hydraulic jack 9 to play a supporting role.

[0083] In specific implementation, based on the vertical scale ruler 10 in the upper lifting assembly, operate the four hydraulic jacks 9 of the upper lifting assembly simultaneously, so that the two arc-shaped groove support modules 8 are lifted simultaneously. During the lifting process, the two flexible arc-shaped gaskets contact the pipe body surface, lift the bending and sinking section of the pipe body until the pipe body structure is basically kept on a horizontal line without obvious bending and sinking phenomenon, and then stop lifting. At this time, the lifting operation of the device has been completed.

[0084] The above is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the scope of the technical solution of the present invention.

Claims

1. A movable lifting device for tensile testing of flexible pipe cables with different calibers, characterized in that, The movable lifting device is used to support the bent and sunken position of the pipeline, and it includes: A double slide rail, which is arranged on the test platform; A bottom moving component, which is movably arranged on the double slide rail and is used for horizontal movement on the test platform; A lifting component, which is movably arranged on the bottom moving component, and the moving direction of the lifting component is perpendicular to the moving direction of the bottom moving component, and is used to accurately control the relative position of the support direction and the pipe body and the lifting height; At least one flexible support cushion block, which is stacked on the lifting component and is used to provide auxiliary support for the pipe body.

2. The movable lifting device for tensile testing of flexible pipe cables with different calibers according to claim 1, characterized in that, The lifting component and the bottom moving component are connected and fixed through a fixing piece.

3. The movable lifting device for tensile testing of flexible pipe cables with different diameters according to claim 1, wherein, The bottom moving component includes: A bottom plate support steel plate, which is located on the upper side of the double slide rail, the length of the bottom plate support steel plate matches the distance between the double slide rails, and the lifting component is movably arranged on the bottom plate support steel plate; A plurality of rollers, which are symmetrically arranged on both sides of the bottom plate support steel plate and are correspondingly arranged with the double slide rail, and the plurality of rollers respectively roll in the corresponding slide rail.

4. The movable lifting device for tensile testing of flexible pipe cables with different diameters according to claim 3, characterized in that, The lifting component includes: A lifting bottom plate, which is movably arranged on the bottom plate support steel plate and is connected and fixed through a bolt and nut connecting member; A plurality of positioning card slot groups, which are arranged at intervals along the extension direction of the double slide rail on the lifting bottom plate, and each positioning card slot group includes 4 symmetrically arranged positioning card slots; A plurality of support modules, which are correspondingly arranged with the plurality of positioning card slot groups, and the support modules are placed in the corresponding positioning card slot groups; A plurality of hydraulic jack groups, which are correspondingly arranged with the plurality of support modules, and each hydraulic jack group includes two symmetrically arranged hydraulic jacks, the fixed end of the hydraulic jack is fixedly connected with the lifting bottom plate, and the driving end is fixedly connected with the support module.

5. The movable lifting device for tensile testing of flexible pipe cables with different diameters according to claim 4, characterized in that, One side of the bottom plate support steel plate is provided with a center line scale ruler, which is perpendicular to the double slide rail, and a pointer scale line is arranged at the center position of the support module close to the center line scale ruler.

6. The movable lifting device for tensile testing of flexible pipe cables with different calibers according to claim 5, characterized in that, A vertical scale ruler is arranged on each of the positioning card slots, and scale lines are arranged at the matching positions of both ends of the support module and the positioning card slot.

7. The movable lifting device for tensile testing of flexible pipe cables with different diameters according to claim 5, characterized in that, An arc-shaped groove is arranged at the top of the support module, and the flexible support cushion block matches the arc-shaped groove.

8. The movable lifting device for tensile testing of flexible pipe cables with different calibers according to claim 7, characterized in that, The arc-shaped groove is a circular arc-shaped groove.

9. A method for tensile testing of flexible pipe cables with different diameters, characterized in that, Using the movable lifting device for tensile testing of flexible pipe cables with different diameters according to any one of claims 1 to 8, the method includes the following steps: S10. According to the length of the test sample pipe, determine the middle section position of the sample pipe. Before the sample pipe is placed on the test platform, move the movable lifting device to the middle section support of the sample pipe on the test platform through the rollers; S20. By adjusting the bolt and nut connecting member, keep the arc-shaped groove support module, the fixed end of the test platform and the actuator end in a straight line; S30. Lift the sample tube, fix one end on the test platform, and connect the other end to the actuator through a flange. Measure the vertical distance between the outermost layer of the sample tube and the lifting assembly. Combine with the scale line of the support module, and vertically lift the support module to the outer surface of the sample tube through a hydraulic jack to play a supporting role.

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