CN113466031A - Umbilical cable lateral extrusion capacity testing device and method - Google Patents
Umbilical cable lateral extrusion capacity testing device and method Download PDFInfo
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- CN113466031A CN113466031A CN202110790883.0A CN202110790883A CN113466031A CN 113466031 A CN113466031 A CN 113466031A CN 202110790883 A CN202110790883 A CN 202110790883A CN 113466031 A CN113466031 A CN 113466031A
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- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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Abstract
The invention discloses a device for testing the lateral extrusion capacity of an umbilical cable, which comprises a loading mechanism, a contact panel and a testing mechanism, wherein the loading mechanism is used for loading umbilical cables; the loading mechanism comprises a tensile testing machine and a tensile testing controller; the contact panel comprises an upper clamp and a lower clamp, the upper clamp and the lower clamp are arranged in opposite directions, the upper clamp is arranged above the lower clamp, the upper clamp can move up and down under the driving of the tensile testing machine, and the upper clamp and the lower clamp are matched to apply lateral extrusion force to the umbilical cable sample; the testing mechanism comprises a displacement-force tester and a vernier caliper, wherein the displacement-force tester is used for acquiring lateral extrusion force and displacement of the umbilical cable sample in real time to generate a displacement-force curve, and the vernier caliper is used for measuring the umbilical cable sample. The invention also discloses an umbilical cable lateral extrusion capability test method based on the umbilical cable lateral extrusion capability test device. By adopting the invention, the effective test of the lateral extrusion capacity can be realized, and the test and evaluation system of the umbilical cable is perfected.
Description
Technical Field
The invention relates to the technical field of umbilical cable manufacturing, in particular to an umbilical cable lateral extrusion capability testing device and an umbilical cable lateral extrusion capability testing method based on the umbilical cable lateral extrusion capability testing device.
Background
The underwater production system is an important development mode of deepwater oil and gas fields, and is a new technology for developing marine oil and gas resources. The underwater production system returns the produced oil, gas and water multiphase or single-phase fluid to nearby underwater, water surface or land supported facilities through an underwater wellhead, an underwater production facility partially or completely placed on the seabed and a submarine pipeline, so that the development of offshore oil and gas fields is realized.
An umbilical cable is a complex cable formed by combining a cable (an electric power cable or a signal cable), an optical cable (a single-mode or multi-mode optical cable) and a hydraulic or chemical agent pipe (a steel pipe or a flexible pipe), and is called as a 'life line' for offshore oil and gas field development. In the development of marine oil and gas, the umbilical is mainly used for providing a hydraulic power channel for an underwater valve actuator, providing electric energy for a control box, an electric pump and the like, providing a remote control and monitoring data transmission channel for underwater facilities and an oil well, and providing required fluids (such as chemical agents including methanol, a corrosion inhibitor and the like) for the oil well, so that the umbilical is very important for implementing an underwater production system.
At present, research works such as design, manufacture and the like of umbilical cables are developed in China, the design and manufacture capacity of underwater umbilical cables is gradually mastered, but a systematic test and evaluation system is not formed in the aspect of test and evaluation of umbilical cables. However, the research work on the aspect of umbilical cable testing in the prior art mainly focuses on the testing of bending stiffness, tensile strength and bending combined load of the umbilical cable, and the research on other performance of the umbilical cable, such as lateral compression capability and other test items, is not complete.
Disclosure of Invention
The invention aims to solve the technical problem of providing an umbilical cable lateral extrusion capacity testing device with a simple structure and an umbilical cable lateral extrusion capacity testing method with simple and convenient operation, and realizing effective testing on the lateral extrusion capacity.
In order to solve the technical problem, the invention provides a device for testing the lateral extrusion capacity of an umbilical cable, which comprises a loading mechanism, a contact panel and a testing mechanism, wherein the loading mechanism is used for loading the umbilical cable; the loading mechanism comprises a tensile testing machine and a tensile testing controller for controlling the tensile testing machine, and the tensile testing machine is used for driving the contact panel to apply lateral extrusion force to the umbilical cable sample; the contact panel comprises an upper clamp and a lower clamp which are arranged on the tensile testing machine, the upper clamp and the lower clamp are arranged oppositely, the lower clamp is used for bearing the umbilical cable sample, the upper clamp is arranged above the lower clamp, and the upper clamp can move up and down under the driving of the tensile testing machine and is matched with the lower clamp to apply lateral extrusion force to the umbilical cable sample; the test mechanism comprises a displacement-force tester and a vernier caliper, the displacement-force tester is used for acquiring lateral extrusion force and displacement of the umbilical cable test sample in real time to generate a displacement-force curve, and the vernier caliper is used for measuring and processing the umbilical cable test sample.
As an improvement of the scheme, the upper clamp and the lower clamp respectively comprise a left clamp and a right clamp which are connected with each other to form a V-shaped structure.
As an improvement of the scheme, the included angle between the left clamp and the right clamp is 120-150 degrees.
As an improvement of the scheme, strain gauges are arranged on contact surfaces of the upper clamp and the lower clamp with the umbilical cable sample, the strain gauges are connected with the tensile test controller, and the tensile test controller collects lateral extrusion force on the strain gauges in real time.
As an improvement of the scheme, the upper clamp and the lower clamp are fixed on the loading mechanism through positioning rings.
As an improvement of the scheme, the positioning ring is a rectangular ring, and four corners of the rectangular ring are in arc transition.
Correspondingly, the invention also provides an umbilical cable lateral extrusion capability test method based on the umbilical cable lateral extrusion capability test device, which comprises the following steps: intercepting an umbilical cable sample; placing the umbilical cable sample on a lower clamp along the horizontal direction; driving the upper clamp to move downwards until the upper clamp is in contact with the umbilical cable test sample; driving the upper clamp to move downwards to apply lateral extrusion force to the umbilical cable sample, and collecting the lateral extrusion force and the displacement of the umbilical cable sample in real time to generate a displacement-force curve; and carrying out measurement processing on the umbilical cable sample.
As an improvement of the above, the step of driving the upper clamp to move downward to apply a lateral compressive force to the umbilical specimen includes: driving the upper clamp to move downwards at a preset loading speed until the lateral extrusion force applied to the umbilical cable sample reaches a preset lateral extrusion force, or until the overall ovality of the umbilical cable sample reaches a preset proportion; maintaining the lateral extrusion force within a preset time; driving the upper clamp to move upwards at a preset unloading speed until the lateral extrusion force applied to the umbilical cable sample is zero; and removing the umbilical cable sample to complete the lateral extrusion test of the umbilical cable sample.
As an improvement of the above scheme, the step of performing measurement processing on the umbilical cable sample comprises: measuring the overall ovality of the umbilical cable sample by a vernier caliper; splitting the umbilical cable sample, and measuring the ovality of the steel pipe in the umbilical cable sample through the vernier caliper; measuring the resistance of the umbilical sample.
As an improvement of the above solution, the umbilical cable lateral compression capability test method further includes: before the umbilical cable sample is placed on a lower clamp along the horizontal direction, a marking line is axially arranged on the outer surface of the umbilical cable sample, and the marking line comprises an upper marking line and a lower marking line; when the umbilical cable sample is placed on a lower clamp along the horizontal direction, the lower clamp is in contact with a lower marking line of the umbilical cable sample; and after the umbilical cable sample is placed on a lower clamp along the horizontal direction, driving the upper clamp to move downwards until the upper clamp is contacted with an upper marking line of the umbilical cable sample.
The implementation of the invention has the following beneficial effects:
the invention can control the tensile testing machine through the tensile testing controller, so that the tensile testing machine drives the upper clamp to move downwards, thereby applying stable and continuous lateral extrusion force to the umbilical cable and realizing the test of the lateral extrusion capacity of the umbilical cable;
meanwhile, the invention also collects lateral extrusion force and displacement of the umbilical cable sample in real time through a displacement-force tester to generate a 'displacement-force' curve so as to realize dynamic measurement of the umbilical cable, and measures and processes the umbilical cable sample through a vernier caliper so as to further detect the deformation state and the performance state of the umbilical cable sample;
in addition, the loading mechanism and the contact panel are in non-fixed connection through the positioning ring, so that the loading mechanism is convenient to disassemble and high in flexibility.
In conclusion, the invention can apply lateral extrusion force to the umbilical cable sample and collect the influence of the lateral extrusion force on the umbilical cable sample in real time, thereby effectively simulating the mechanical response and the cross section deformation characteristics of the umbilical cable when bearing the lateral extrusion in the installation process, realizing the effective test of the lateral extrusion capacity and further perfecting the test and evaluation system of the umbilical cable.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an umbilical lateral crush capability test apparatus according to the present invention;
FIG. 2 is a schematic view showing the structure of a contact panel in the umbilical cable lateral pressure capability test apparatus according to the present invention;
FIG. 3 is a schematic structural view of a positioning ring in the umbilical cable lateral extrusion capability test device of the present invention;
FIG. 4 is a flow chart of a first embodiment of the method for testing the lateral crushing capability of an umbilical of the present invention;
FIG. 5 is a flow chart of a second embodiment of the method for testing the lateral crushing capability of the umbilical of the present invention;
FIG. 6 is a flow chart of a third embodiment of the method for testing the lateral crushing capability of the umbilical of the present invention;
FIG. 7 is a flow chart of a fourth embodiment of the method for testing the lateral crushing capability of the umbilical of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the invention is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the invention.
Referring to fig. 1, fig. 1 shows a structural diagram of an embodiment of the umbilical cable lateral extrusion capability testing device of the present invention, which includes a loading mechanism, a contact panel 3 and a testing mechanism, specifically:
the loading mechanism comprises a tensile testing machine 1 and a tensile testing controller 6; the tensile test controller 6 is connected with the tensile testing machine 1 and is used for controlling the tensile testing machine 1; the tensile testing machine 1 is used for driving the contact panel 3 to apply lateral extrusion force to the umbilical cable sample 4.
The touch panel 3 includes an upper jig 31 and a lower jig 32 (see fig. 2) provided on the tensile testing machine 1, and the upper jig 31 and the lower jig 32 are provided to face each other; the lower clamp 32 is used for bearing the umbilical cable sample 4, the upper clamp 31 is arranged above the lower clamp 32, and the upper clamp 31 can move up and down under the driving of the tensile testing machine 1 and is matched with the lower clamp 32 to apply lateral extrusion force to the umbilical cable sample 4. It should be noted that the upper clamp 31 and the lower clamp 32 can contact the umbilical cord sample 4 and can effectively transmit the lateral pressing force, and preferably, the upper clamp 31 and the lower clamp 32 are made of hard rubber, so as to ensure that the tensioner pads used in the umbilical cord installation process of the upper clamp 31 and the lower clamp 32 are consistent.
The testing mechanism comprises a displacement-force tester 5 and a vernier caliper; the displacement-force tester 5 is used for acquiring lateral extrusion force and displacement of the umbilical cable sample 4 in real time to generate a displacement-force curve, so that the diameter deformation of the umbilical cable in the lateral pressure direction is automatically recorded; the vernier caliper is used for measuring the umbilical cable sample 4.
It should be noted that the tensile testing machine 1 adopts a hydraulic drive mode or a pneumatic drive mode to drive the contact panel 3, and specifically, the upper clamp 31 may be connected to a piston rod in the tensile testing machine 1, so as to realize the up-and-down movement of the upper clamp 31.
During work, the umbilical cable sample 4 can be placed on the lower clamp 32, then the tensile testing machine 1 is controlled by the tensile testing controller 6 so that the tensile testing machine 1 drives the upper clamp 31 to move downwards, and at the moment, the upper clamp 31 can be matched with the lower clamp 32 to apply lateral extrusion force to the umbilical cable sample 4 so as to realize the test of the lateral extrusion capacity of the umbilical cable; in the test process, the displacement-force tester 5 collects lateral extrusion force and displacement of the umbilical cable sample 4 in real time to generate a displacement-force curve; after the test is finished, the umbilical cable sample 4 is measured by the vernier caliper so as to further detect the deformation state and the performance state of the umbilical cable sample 4.
Therefore, the invention can apply lateral extrusion force to the umbilical cable sample 4 and collect the influence of the lateral extrusion force on the umbilical cable sample 4 in real time, thereby effectively simulating the mechanical response and the cross section deformation characteristics of the umbilical cable when bearing lateral extrusion in the installation process, realizing the effective test of the lateral extrusion capacity and further perfecting the test and evaluation system of the umbilical cable.
As shown in fig. 2 and 3, each of the upper and lower clamps 31 and 32 includes a left clamp 3a and a right clamp 3b (see fig. 3), and the left and right clamps 3a and 3b are connected to each other to form a "V" shaped structure. Specifically, the left clamp 3a and the right clamp 3b are steel plates with the thickness of 15-25mm, and the left clamp 3a and the right clamp 3b are manufactured in a welding mode, so that the processing is convenient. More preferably, the included angle between the left clamp 3a and the right clamp 3b is 120 °, 150 °, 130 °, 135 °, 140 °, etc.
It should be noted that, the groove side of the upper clamp 31 faces downward, and the groove side of the lower clamp 32 faces upward, so that the upper clamp 31 is matched with the lower clamp 32 to completely wrap and position the umbilical cable sample 4, thereby effectively applying lateral extrusion force to the umbilical cable sample 4 and preventing the umbilical cable sample 4 from rotating. Meanwhile, the V-shaped structure is adopted to laterally press the umbilical cable, so that the mechanical response and the section deformation characteristics of the umbilical cable when the umbilical cable bears transverse extrusion in the installation process can be effectively simulated.
As shown in fig. 3, the upper clamp 31 and the lower clamp 32 are both fixed to the loading mechanism by a positioning ring 2. That is, the upper clamp 31 can be fixed on the piston rod of the tensile testing machine 1 through the positioning ring 2, wherein the bottom of the piston rod is provided with the cross rod 7 arranged along the horizontal direction; the lower clamp 32 is fixed to the lower end of the tensile testing machine 1 through the positioning ring 2, wherein the lower end of the tensile testing machine 1 is also provided with a cross rod 7 arranged in the horizontal direction.
Specifically, the positioning rings 2 include at least a left positioning ring 2 and a right positioning ring 2. When the fixing is performed, the left end of the cross rod 7 and the left clamp 3a of the upper clamp 31 simultaneously penetrate through the annular hole of the left positioning ring 2, and the right end of the cross rod 7 and the right clamp 3b of the upper clamp 31 simultaneously penetrate through the annular hole of the right positioning ring 2, so that the cross rod 7 and the upper clamp 31 are fixed under the limiting effect of the annular hole; similarly, the left end of the cross rod 7 and the left clamp 3a of the lower clamp 32 simultaneously penetrate through the annular hole of the left positioning ring 2, and the right end of the cross rod 7 and the right clamp 3b of the lower clamp 32 simultaneously penetrate through the annular hole of the right positioning ring 2, so that the cross rod 7 and the lower clamp 32 are fixed under the limiting effect of the annular hole.
Therefore, the connection mode of the positioning ring 2, the cross bar 7, the upper clamp 31 and the lower clamp 32 is a non-fixed mode, so that the disassembly is easy and the flexibility is strong. In practical applications, the structure of the tensile testing machine 1 is not limited, and the upper clamp 31 and the lower clamp 32 can be fixed to the tensile testing machine 1 by the positioning ring 2.
Preferably, the positioning ring 2 is a rectangular ring, and four corners of the rectangular ring are in arc transition, so that the positioning ring 2 can be ensured to be more attached to the contact panel 3 and the cross rod 7, and the damage to an operator during installation can be avoided; meanwhile, the thickness of the annular wall of the positioning ring 2 is 2.5-3.5cm, preferably 3cm, so that the strength of the positioning ring 2 can be effectively ensured.
Further, upper portion anchor clamps 31 and lower part anchor clamps 32 with all be equipped with the foil gage on the contact surface of umbilical cable sample 4, the foil gage with tensile test controller 6 is connected, tensile test controller 6 gathers in real time lateral extrusion force on the foil gage to control tensile testing machine 1 effectively, realize the accurate of lateral extrusion force and apply.
Therefore, the umbilical cable lateral extrusion capability testing device with the lateral extrusion capability testing function is formed by combining the loading mechanism, the contact panel 3 and the testing mechanism together, can effectively position an umbilical cable, accurately apply lateral extrusion force, effectively detect mechanical response and section deformation characteristics when lateral extrusion is borne, and is high in accuracy.
Referring to fig. 4 and fig. 4, a first embodiment of the umbilical cable lateral extrusion capability test method based on the umbilical cable lateral extrusion capability test device of the present invention is shown, which comprises:
and S101, intercepting an umbilical cable sample.
Preferably, the umbilical cable sample has a length of 200mm to 300 mm.
And S102, placing the umbilical cable sample on a lower clamp along the horizontal direction.
When the umbilical cable test piece is placed, the steel pipe unit in the umbilical cable test piece can be close to the contact position of the contact panel and the umbilical cable test piece, or the electric unit in the umbilical cable test piece can be close to the contact position of the umbilical cable test piece, so that the specific measurement can be realized.
S103, driving the upper clamp to move downwards until the upper clamp is contacted with the umbilical cable test sample.
Specifically, a piston rod of the tensile testing machine can be controlled by a tensile testing controller in the loading mechanism, and then the piston rod drives the upper clamp to move downwards until the upper clamp is contacted with the umbilical cable test sample.
And S104, driving the upper clamp to move downwards so as to apply lateral extrusion force to the umbilical cable sample, and acquiring the lateral extrusion force and the displacement of the umbilical cable sample in real time to generate a displacement-force curve.
It should be noted that, through the "displacement-force" curve constructed by the tensile test controller, the diameter deformation of the umbilical cable in the lateral pressure direction can be dynamically grasped, and the real-time performance is strong.
And S105, carrying out measurement processing on the umbilical cable sample.
Specifically, the step of performing measurement processing on the umbilical cable sample comprises the following steps:
(1) measuring the overall ovality of the umbilical cable sample by a vernier caliper;
(2) splitting the umbilical cable sample, and measuring the ovality of the steel pipe in the umbilical cable sample through the vernier caliper;
(3) measuring the resistance of the umbilical sample.
Further, photographing records are required at different stages of the testing process.
The method can be carried out at room temperature, a displacement-force curve can be automatically constructed through a tensile test controller, the overall ovality of the umbilical cable sample and the ovality of the steel tube in the umbilical cable sample are measured through a vernier caliper, and the resistance of the umbilical cable sample is measured through a universal ammeter so as to obtain a finished test result, so that the allowable working conditions of industrial installation of the umbilical cable are obtained, the precision is high, the error is small, and the influence of lateral extrusion on the use of the umbilical cable is conveniently and quickly known.
Referring to fig. 5 and fig. 5, a second embodiment of the umbilical cable lateral extrusion capability test method based on the umbilical cable lateral extrusion capability test device of the present invention is shown, which comprises:
s201, intercepting an umbilical cable sample.
S202, placing the umbilical cable sample on a lower clamp along the horizontal direction.
S203, driving the upper clamp to move downwards until the upper clamp is contacted with the umbilical cable test sample.
And S204, driving the upper clamp to move downwards at a preset loading speed until the lateral extrusion force applied to the umbilical cable sample reaches a preset lateral extrusion force, or until the overall ovality of the umbilical cable sample reaches a preset proportion.
Preferably, the preset loading speed is less than 5mm/minute, so that the rapid increase of lateral extrusion force can be avoided, and the test effect is influenced.
Correspondingly, the invention can control the state of the umbilical cable sample in a mode of detecting lateral extrusion force or overall ovality, and has strong flexibility. Preferably, the preset lateral extrusion force is 6.8T/m, the preset proportion is 10% -12%, and preferably 10%, deformation of the umbilical cable sample can be guaranteed, and the lateral extrusion force borne by the umbilical cable sample can meet the test requirement.
And S205, maintaining the lateral pressing force for a preset time.
Preferably, the predetermined time is 5 to 10 minutes, which can ensure a sufficient extrusion time.
And S206, driving the upper clamp to move upwards at a preset unloading speed until the lateral extrusion force applied to the umbilical cable sample is zero.
S207, detaching the umbilical cable sample, and completing the lateral extrusion test of the umbilical cable sample.
And S208, acquiring the lateral extrusion force and the displacement of the umbilical cable sample in the test process in real time to generate a displacement-force curve.
And S209, carrying out measurement processing on the umbilical cable sample.
Different from the first embodiment shown in fig. 4, in this embodiment, it is clear that the mode of driving the upper clamp to move downwards to apply the lateral extrusion force to the umbilical cable sample is realized, the test is realized by gradually increasing/decreasing the lateral extrusion force, the stability is high, and the purpose of the lateral extrusion test is achieved while the umbilical cable is effectively protected.
Referring to fig. 6 and fig. 6, a third embodiment of the umbilical cable lateral extrusion capability test method based on the umbilical cable lateral extrusion capability test device of the present invention is shown, which comprises:
s301, intercepting an umbilical cable sample, and axially arranging marking lines on the outer surface of the umbilical cable sample, wherein the marking lines comprise an upper marking line A, B and a lower marking line C, D (see figure 2).
S302, placing the umbilical cable sample on a lower clamp along the horizontal direction, and enabling the lower clamp to be in contact with a lower marking line of the umbilical cable sample.
And S303, driving the upper clamp to move downwards until the upper clamp is contacted with an upper marking line of the umbilical cable sample.
S304, driving the upper clamp to move downwards at a preset loading speed until the lateral extrusion force applied to the umbilical cable sample reaches a preset lateral extrusion force, or until the overall ovality of the umbilical cable sample reaches a preset proportion;
s305, maintaining lateral extrusion force within preset time;
s306, driving the upper clamp to move upwards at a preset unloading speed until the lateral extrusion force applied to the umbilical cable sample is zero;
s307, the umbilical cable sample is dismantled, and the lateral extrusion test of the umbilical cable sample is completed.
And S308, acquiring the lateral extrusion force and the displacement of the umbilical cable sample in the test process in real time to generate a displacement-force curve.
And S309, performing measurement processing on the umbilical cable sample.
In the test process, the positions of the upper marking line and the lower marking line are the contact positions of the umbilical cable sample and the upper clamp and the lower clamp, and the lateral extrusion force applied to the positions is the largest, so that when the umbilical cable sample is measured, the positions of the upper marking line and the lower marking line can be measured at fixed points, and the pertinence is stronger.
Referring to fig. 7 and fig. 7, a fourth embodiment of the umbilical cable lateral extrusion capability test method based on the umbilical cable lateral extrusion capability test device of the present invention is shown, which comprises:
s401, taking four umbilical cable samples with the length of about 200mm-300mm, respectively drawing four straight lines on the outer surface of each umbilical cable sample along the axial direction to serve as marking lines (including two upper marking lines A, B and two lower marking lines C, D, see FIG. 2) for indicating the loading position.
S402, respectively horizontally placing the umbilical cable samples on V-shaped lower clamps, and keeping the lower marking lines in contact with the lower clamps.
And S403, gradually lowering a hydraulic cylinder of the tensile testing machine, and keeping the umbilical cable sample in contact with the upper clamp.
S404, starting loading and recording a displacement-force curve. Wherein the initial loading speed is less than 5mm/minute until the preset lateral extrusion force is loaded, or the overall ovality of the umbilical cable sample reaches 10%.
And S405, keeping for 5 minutes.
And S406, gradually unloading at the speed of less than 5mm/minute until the unloading is zero.
S407, removing the umbilical cable sample, and finishing the lateral extrusion test.
S408, measuring the overall ellipticity of the umbilical cable along the axis direction by using a vernier caliper; splitting the umbilical cable, and measuring the ovality of the super-duplex stainless steel tube by using a vernier caliper; the resistance of the cable unit is measured.
Unlike the third embodiment shown in fig. 6, in this embodiment, four umbilical cable samples are cut and measured separately, which is highly reliable.
Therefore, the invention combines the umbilical cable lateral extrusion capability test device with a unique structure with the umbilical cable lateral extrusion capability test method with a unique process, realizes effective test of the lateral extrusion capability and further perfects the test and evaluation system of the umbilical cable.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The device for testing the lateral extrusion capacity of the umbilical cable is characterized by comprising a loading mechanism, a contact panel and a testing mechanism;
the loading mechanism comprises a tensile testing machine and a tensile testing controller for controlling the tensile testing machine, and the tensile testing machine is used for driving the contact panel to apply lateral extrusion force to the umbilical cable sample;
the contact panel comprises an upper clamp and a lower clamp which are arranged on the tensile testing machine, the upper clamp and the lower clamp are arranged oppositely, the lower clamp is used for bearing the umbilical cable sample, the upper clamp is arranged above the lower clamp, and the upper clamp can move up and down under the driving of the tensile testing machine and is matched with the lower clamp to apply lateral extrusion force to the umbilical cable sample;
the test mechanism comprises a displacement-force tester and a vernier caliper, the displacement-force tester is used for acquiring lateral extrusion force and displacement of the umbilical cable test sample in real time to generate a displacement-force curve, and the vernier caliper is used for measuring and processing the umbilical cable test sample.
2. The umbilical cable lateral crush capability test device of claim 1, wherein the upper clamp and the lower clamp each comprise a left clamp and a right clamp, the left clamp and the right clamp being connected to each other to form a "V" shaped structure.
3. The umbilical cable lateral extrusion capability test device of claim 2, wherein the included angle between the left clamp and the right clamp is 120-150 °.
4. The umbilical cable lateral extrusion capacity testing device of claim 1, wherein the contact surfaces of the upper clamp and the lower clamp with the umbilical cable sample are provided with strain gauges, the strain gauges are connected with the tensile test controller, and the tensile test controller collects the lateral extrusion force on the strain gauges in real time.
5. The umbilical cable lateral crush capability test apparatus of claim 1, wherein the upper clamp and the lower clamp are each secured to the loading mechanism by a retaining ring.
6. The umbilical lateral crush capability test device of claim 5, wherein the retaining ring is a rectangular ring and four corners of the rectangular ring are arc transitions.
7. An umbilical cable lateral extrusion capability test method based on the umbilical cable lateral extrusion capability test apparatus of any one of claims 1 to 6, comprising:
intercepting an umbilical cable sample;
placing the umbilical cable sample on a lower clamp along the horizontal direction;
driving the upper clamp to move downwards until the upper clamp is in contact with the umbilical cable test sample;
driving the upper clamp to move downwards to apply lateral extrusion force to the umbilical cable sample, and collecting the lateral extrusion force and the displacement of the umbilical cable sample in real time to generate a displacement-force curve;
and carrying out measurement processing on the umbilical cable sample.
8. The umbilical lateral crush capability test method of claim 7, wherein the step of driving the upper clamp downward to apply a lateral crush force to the umbilical specimen includes:
driving the upper clamp to move downwards at a preset loading speed until the lateral extrusion force applied to the umbilical cable sample reaches a preset lateral extrusion force, or until the overall ovality of the umbilical cable sample reaches a preset proportion;
maintaining the lateral extrusion force within a preset time;
driving the upper clamp to move upwards at a preset unloading speed until the lateral extrusion force applied to the umbilical cable sample is zero;
and removing the umbilical cable sample to complete the lateral extrusion test of the umbilical cable sample.
9. The method for testing the lateral umbilical cord compression capability of claim 7 wherein the step of performing a measurement process on the umbilical cord specimen comprises:
measuring the overall ovality of the umbilical cable sample by a vernier caliper;
splitting the umbilical cable sample, and measuring the ovality of the steel pipe in the umbilical cable sample through the vernier caliper;
measuring the resistance of the umbilical sample.
10. The umbilical lateral crush capability test method of claim 7, further comprising:
before the umbilical cable sample is placed on a lower clamp along the horizontal direction, a marking line is axially arranged on the outer surface of the umbilical cable sample, and the marking line comprises an upper marking line and a lower marking line;
when the umbilical cable sample is placed on a lower clamp along the horizontal direction, the lower clamp is in contact with a lower marking line of the umbilical cable sample;
and after the umbilical cable sample is placed on a lower clamp along the horizontal direction, driving the upper clamp to move downwards until the upper clamp is contacted with an upper marking line of the umbilical cable sample.
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