DE202023101033U1 - Device for testing the bending stiffness of the umbilical cable - Google Patents

Abstract

Device for testing the bending stiffness of the umbilical cable, characterized in that the device comprises:
a frame body comprising a transom (1) and a first guide rail assembly (10) provided along a longitudinal direction of the transom (1), the first guide rail assembly (10) being provided with a clamp portion, the clamp portion for clamping the to testing umbilical cable, the clamping section being slidably connected to the first guide rail assembly (10), the clamping section comprising a first clamping section (11) and a second clamping section (12);
a drive unit comprising a connecting rod assembly, a second guide rail assembly (20) and a first drive section, the second guide rail assembly (20) being provided on the transom, a longitudinal direction of the second guide rail assembly (20) perpendicular to a longitudinal direction of the first guide rail assembly (10 ), wherein the connecting rod assembly is slidably connected to the second guide rail assembly (20), wherein a longitudinal direction of the connecting rod assembly is parallel to the longitudinal direction of the transom (1), wherein the connecting rod assembly is connected to the umbilical cable to be tested by pulling assemblies, and wherein the pulling assemblies are symmetrical are provided to each other, the first drive section being connected to a central part of the connecting rod assembly, the first driving section driving and moving the connecting rod assembly along the second guide rail assembly (20);
a sensor unit comprising a displacement sensor unit and a tensile force sensor (3), wherein when the umbilical cable to be tested is straight, the displacement sensor unit is in contact with the umbilical cable to be tested, the displacement sensor unit serving to measure a displacement along a height direction of the frame body when the umbilical cable to be tested is deformed, wherein one end of the tension sensor (3) is connected to the first drive section and another end is connected to the connecting rod assembly.

Description

TECHNICAL AREA

The utility model relates to the technical field of cable bending stiffness testing, in particular to a device for testing the bending stiffness of umbilical cables.

STATE OF THE ART

As society's energy needs continue to grow, the exploitation of offshore oil and gas resources is also increasing, leading to increased use and exploitation of umbilical cables. In a way, the umbilical cable is a combination of one or more electric cables, fiber optic cables, steel pipes or hoses, which allows the integrated transmission of different media to be realized. The umbilical cable is bent during production, laying and operation, and the bending stiffness is an important technical index of umbilical cables. The bending stiffness of the umbilical cable determines its bending radius and its lifetime distribution under external forces during transportation and construction.

The existing umbilical cable bending stiffness testing device is relatively simple: it needs to manually detect the umbilical cable shear and bending deformation displacement, and then measure and record the data. However, existing test methods are error-prone and the test method is cumbersome, time-consuming and labor-intensive, and the accuracy of the test results is low.

CONTENT OF PRESENT UTILITY MODEL

For this reason, the technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an umbilical cable bending stiffness testing apparatus, which can improve the accuracy of the test data, and the testing method is simple and saves time and effort Effort.

In order to solve the above technical problems, the utility model provides an apparatus for testing the flexural rigidity of the umbilical cable, comprising
a frame body comprising a transom and a first guide rail assembly provided along a longitudinal direction of the transom, the first guide rail assembly being provided with a clamp portion, the clamp portion for clamping the umbilical cable to be tested, the clamp portion being slidable with the first guide rail assembly is connected, wherein the clamping portion comprises a first clamping portion and a second clamping portion;
a drive unit comprising a connecting rod assembly, a second guide rail assembly and a first driving portion, the second guide rail assembly being provided on the transom, a longitudinal direction of the second guide rail assembly being perpendicular to the longitudinal direction of the first guide rail assembly, the connecting rod assembly being slidably connected to the second guide rail assembly , wherein a longitudinal direction of the connecting rod assembly is parallel to the longitudinal direction of the transom, wherein the connecting rod assembly is connected to the umbilical cable to be tested by the pulling assembly, and wherein the pulling assemblies are provided symmetrically to each other, wherein the first driving portion is connected to a middle part of the connecting rod assembly, wherein the first drive section drives the connecting rod assembly and moves it along the second guide rail assembly;
a sensor unit comprising a displacement sensor unit and a tensile force sensor, wherein when the umbilical cable to be tested is straight, the displacement sensor unit is in contact with the umbilical cable to be tested, wherein the displacement sensor unit serves to measure a displacement along a height direction of the frame body when the deforming the umbilical cable to be tested with one end of the strain gauge connected to the first drive section and another end connected to the connecting rod assembly.

Preferably the connecting rod assembly comprises a mounting plate and a connecting column, the connecting column being mounted on the fixing plate, the pulling assembly being connected to the connecting column, the fixing plate being connected to the first drive section.

Preferably, it is provided that the first driving portion includes a screw jack and a support base, the screw jack being provided on the support base, the screw jack being connected to the mounting plate.

Preferably, the first clamping portion comprises a first slide and a first jaw, the first slide being slidably connected to the first track assembly, the first jaw being mounted to the first slide, the first jaw the umbilical cable to be tested is stuck; wherein the setting method of the second clamp portion is the same as that of the first clamp portion.

It is preferably provided that the pulling arrangement comprises a pulling cable arrangement and a fastening component, with the fastening component and the umbilical cable to be tested being movably connected to one another, with one end of the pulling cable arrangement being connected to the fastening component, with another end of the pulling cable arrangement being connected to the connecting rod arrangement .

It is preferably provided that the pulling arrangements comprise a first pulling arrangement and a second pulling arrangement, the first pulling arrangement and the second pulling arrangement are provided symmetrically to one another along a longitudinal direction of the umbilical cable to be tested, the first pulling arrangement comprising a first pulling rope and a first fastening element which are connected to each other, wherein the second traction assembly comprises a second traction cable and a second fastener that are connected to each other.

Preferably it is provided that the displacement sensor unit comprises a mounting seat assembly and a displacement sensor assembly, the mounting seat assembly being mounted on the transom, the displacement sensor assembly being mounted on the mounting seat assembly.

It is preferably provided that the displacement sensor arrangement comprises a first displacement sensor and a second displacement sensor, the first displacement sensor being located in the middle of the umbilical cable to be tested, the second displacement sensor being located at any other location of the umbilical cable to be tested.

Provision is preferably made for the end of the first guide rail arrangement to be provided with a first limit stop, the first limit stop limiting a movement of an end of the umbilical cable to be tested.

Provision is preferably made for one end of the second guide rail arrangement to be provided with a second limit stop, the second limit stop limiting a movement of the connecting rod arrangement.

• eine Vorrichtung zum Prüfen der Biegesteifigkeit vom Nabelkabel ist im Gebrauchsmuster beschrieben, wobei durch Setzen des Klemmabschnitts und der ersten Führungsschienenanordnung der Klemmabschnitt beide Enden des zu testenden Nabelkabels klemmen kann, wobei der Klemmabschnitt mit der ersten Führungsschienenanordnung verschiebbar verbunden ist, wodurch, wenn sich das zu testende Nabelkabel unter Belastung verformt, sich seine beiden Enden auf der ersten Führungsschienenanordnung bewegen können, wobei die Prüfvorrichtung auch mit einer Antriebseinheit und einer Sensoreinheit versehen ist, wobei der erste Antriebsabschnitt der Antriebseinheit an dem zu testenden Nabelkabel ziehen kann, um es zu biegen und zu verformen, und wobei der erste Antriebsabschnitt eine Kraft auf das zu testende Nabelkabel durch die Verbindungsstangenanordnung ausübt, wobei die Verbindungsstangenanordnung mit dem zu testenden Nabelkabel verbunden ist, und
• wobei die Verbindungsposition symmetrisch zur Mitte entlang des zu testenden Nabelkabels ist, wobei die Sensoreinheit die Verschiebungsdaten und Zugkraftsdaten des zu testenden Nabelkabels messen und sie auf das Steuerterminal hochladen kann, wobei die Biegesteifigkeit des zu testenden Nabelkabels durch Berechnung der aus dem Test erhaltenen Daten erhalten wird, wobei die Vorrichtung zum Prüfen der Biegesteifigkeit vom Nabelkabel des vorliegenden Gebrauchsmusters die Genauigkeit der Prüfdaten verbessern kann, und wobei der Prüfprozess einfach ist, wobei die Arbeitskraft eingespart und die Prüfeffizienz weiter verbessert wird.

Compared to the state of the art, the above technical solution of the utility model has the following advantages:

• a device for testing the flexural rigidity of the umbilical cable is described in the utility model, by setting the clamping section and the first guide rail assembly, the clamping section can clamp both ends of the umbilical cable to be tested, the clamping section being slidably connected to the first guide rail assembly, whereby when the to testing umbilical deformed under load, its both ends can move on the first guide rail assembly, the testing device is also provided with a driving unit and a sensor unit, wherein the first driving portion of the driving unit can pull the umbilical cable to be tested to bend and tighten it deform, and wherein the first drive portion applies a force to the umbilical cable to be tested through the connecting rod assembly, the connecting rod assembly being connected to the umbilical cable to be tested, and
• wherein the connection position is symmetrical to the center along the umbilical cable to be tested, the sensor unit can measure the displacement data and tensile force data of the umbilical cable to be tested and upload them to the control terminal, whereby the bending stiffness of the umbilical cable to be tested is obtained by calculating the data obtained from the test , the umbilical cable bending rigidity testing apparatus of the present utility model can improve the accuracy of test data, and the testing process is simple, saving manpower and further improving the testing efficiency.

character list

• 1 ist eine schematische strukturelle Darstellung der Vorderansicht des bevorzugten Ausführungsbeispiels des Gebrauchsmusters.
• 2 ist eine schematische strukturelle Darstellung der Draufsicht des bevorzugten Ausführungsbeispiels des Gebrauchsmusters.
• 3 ist eine schematische strukturelle Darstellung der Seitenansicht des bevorzugten Ausführungsbeispiels des Gebrauchsmusters.

In order to make the contents of the utility model more clear to understand, the utility model will be described below in further detail according to specific embodiments of the utility model in conjunction with the accompanying drawings, wherein

• 1 Fig. 12 is a schematic structural representation of the front view of the preferred embodiment of the utility model.
• 2 Fig. 12 is a schematic structural representation of the plan view of the preferred embodiment of the utility model.
• 3 Fig. 12 is a schematic structural representation of the side view of the preferred embodiment of the utility model.

Reference List

1.

transom;

10

First guide rail arrangement,

11

first clamping section,

110

First Cheek;

12

second clamping section;

120

second jaw;

20

Second guide rail assembly;

21

First train arrangement;

22

Second train arrangement;

23

mounting plate;

24

first connecting pillar,

25

Second Connection Column;

26

threaded spindle jack;

27

support base;

28

drive motor;

3

draft sensor;

41

first displacement sensor;

42

Second displacement sensor.

DETAILED DESCRIPTION

The present utility model is further described below in connection with the accompanying drawings and specific embodiments in order that those skilled in the art may better understand and practice the utility model, but the embodiments provided are not intended to limit the utility model.

Example 1

• einen Rahmenkörper, der einen Querbalken 1 und eine erste Führungsschienenanordnung 10 umfasst, die entlang einer Längsrichtung des Querbalkens 1 vorgesehen ist, wobei die erste Führungsschienenanordnung 10 zwei parallel angeordnete Führungsschienen umfasst, wobei der Rahmenkörper auch eine Säule umfasst, wobei das Ende des Querbalkens 1 an der Säule montiert ist, wobei die erste Führungsschienenanordnung 10 mit einem Klemmabschnitt versehen ist, wobei der Klemmabschnitt zum Klemmen des zu testenden Nabelkabels dient, wobei der Klemmabschnitt verschiebbar mit der ersten Führungsschienenanordnung 10 verbunden ist, wobei der Klemmabschnitt einen ersten Klemmabschnitt 11 und einen zweiten Klemmabschnitt 12 umfasst, wobei der erste Klemmabschnitt 11 und der zweite Klemmabschnitt 12 jeweils die Enden des zu testenden Nabelkabels klemmen;
• eine Antriebseinheit, die eine Verbindungsstangenanordnung, eine zweite Führungsschienenanordnung 20 und einen ersten Antriebsabschnitt umfasst, wobei die zweite Führungsschienenanordnung 20 an dem Querbalken vorgesehen ist, wobei eine Längsrichtung der zweiten Führungsschienenanordnung 20 senkrecht zur Längsrichtung der ersten Führungsschienenanordnung ist, wobei die Verbindungsstangenanordnung verschiebbar mit der zweiten Führungsschienenanordnung 20 verbunden ist, wobei eine Längsrichtung der Verbindungsstangenanordnung parallel zur Längsrichtung des Querbalkens 1 ist, wobei die Verbindungsstangenanordnung mit dem zu testenden Nabelkabel durch die Zuganordnung verbunden ist, und wobei die Zuganordnungen symmetrisch zueinander vorgesehen sind, wobei die Zuganordnungen eine erste Zuganordnung 21 und eine zweite Zuganordnung 22 umfassen. Der erste Antriebsabschnitt ist mit einem Mittelteil der Verbindungsstangenanordnung verbunden,
• wobei der erste Antriebsabschnitt die Verbindungsstangenanordnung antreibt und entlang der zweiten Führungsschienenanordnung 20 bewegt;
• eine Sensoreinheit, die eine Verschiebungssensoreinheit und einen Zugkraftsensor 3 umfasst, wobei, wenn das zu testende Nabelkabel gerade ist, die Verschiebungssensoreinheit in Kontakt mit dem zu testenden Nabelkabel ist, wobei die Verschiebungssensoreinheit dient dazu, eine Verschiebung entlang einer Höhenrichtung des Rahmenkörpers zu messen, wenn das zu testende Nabelkabel verformt wird, wobei ein Ende des Zugkraftsensors 3 mit dem ersten Antriebsabschnitt verbunden ist und ein anderes Ende mit der Verbindungsstangenanordnung verbunden ist.

Referring to the 1 until 3 discloses the utility model a device for testing the bending stiffness of umbilical cable, comprising:

• a frame body comprising a transom 1 and a first guide rail assembly 10 provided along a longitudinal direction of the transom 1, the first guide rail assembly 10 comprising two guide rails arranged in parallel, the frame body also comprising a column, the end of the transom 1 at the column, the first guide rail assembly 10 being provided with a clamping portion, the clamping portion being for clamping the umbilical cable to be tested, the clamping portion being slidably connected to the first guide rail assembly 10, the clamping portion having a first clamping portion 11 and a second clamping portion 12, the first clamping section 11 and the second clamping section 12 respectively clamping the ends of the umbilical cable to be tested;
• a drive unit comprising a connecting rod assembly, a second guide rail assembly 20 and a first driving section, the second guide rail assembly 20 being provided on the transom, a longitudinal direction of the second guide rail assembly 20 being perpendicular to the longitudinal direction of the first guide rail assembly, the connecting rod assembly being slidable with the second guide rail assembly 20, wherein a longitudinal direction of the connecting rod assembly is parallel to the longitudinal direction of the transom 1, wherein the connecting rod assembly is connected to the umbilical cable to be tested by the pulling assembly, and wherein the pulling assemblies are provided symmetrically to each other, the pulling assemblies being a first pulling assembly 21 and a second pull assembly 22 include. The first drive section is connected to a middle part of the connecting rod assembly,
• the first drive section drives and moves the connecting rod assembly along the second guide rail assembly 20;
• a sensor unit comprising a displacement sensor unit and a tensile force sensor 3, wherein when the umbilical cable to be tested is straight, the displacement sensor unit is in contact with the umbilical cable to be tested, the displacement sensor unit serves to measure a displacement along a height direction of the frame body when the umbilical cable to be tested is deformed with one end of the tension sensor 3 connected to the first drive section and another end connected to the connecting rod assembly.

Thus, it may be known that a device for testing the flexural rigidity of the umbilical cable is claimed in the utility model, by setting the clamping section and the first guide rail arrangement, the clamping section can clamp both ends of the umbilical cable to be tested, the clamping section being slidably connected to the first guide rail arrangement, whereby if the navel to be tested cable deforms under load, its both ends can move on the first guide rail assembly, the testing device is also provided with a drive unit and a sensor unit, wherein the first drive portion of the drive unit can pull the umbilical cable to be tested to bend and deform it , and wherein the first drive section applies a force to the umbilical cable to be tested through the connecting rod assembly, wherein the connecting rod assembly is connected to the umbilical cable to be tested, and wherein the connection position is symmetrical about the center along the umbilical cable to be tested, wherein the sensor unit provides the displacement data and the tensile force data of the umbilical cable to be tested and upload it to the control terminal, the flexural rigidity of the umbilical cable to be tested is obtained by calculating the data obtained from the test, the device for testing the flexural rigidity of the umbilical cable of the present utility model can improve the accuracy of the test data, and the inspection process is simple, saving manpower and further improving inspection efficiency.

In a further development it is provided that the connecting rod arrangement comprises a fastening plate 23 and a connecting column, the connecting column being mounted on the fastening plate 23, the pulling arrangement being connected to the connecting column, the fastening plate 23 being connected to the first drive section, the A connecting column comprises a first connecting column 24 and a second connecting column 25 connected to each other, the first connecting column 24 and the second connecting column 25 being mounted on the mounting plate 23 .

In a further development, it is provided that the first drive section comprises a threaded spindle lifter 26 and a support base 27, with the threaded spindle lifter 26 being provided on the support base 27, with the threaded spindle lifter 26 being connected to the tensile force sensor 3, the threaded spindle lifter 26 also being connected to the drive motor 28 are interconnected, by this arrangement the lead screw jack 26 runs under the drive of the drive motor 28 and exerts an active force on the tie rod assembly, causing the tie rod assembly to pull on the umbilical cable under test so that the umbilical cable under test is deformed.

Specifically, it is envisaged that the first clamping portion 11 comprises a first slider 110 and a first jaw, the first slider 110 being slidably connected to the first guide rail assembly 10, the first jaw being mounted on the first slider 110, the first jaw one end of the umbilical cable to be tested is stuck; the second clamping portion 12 comprising a second slide 120 and a second jaw, the second slide 120 being slidably connected to the first track assembly 10, the second jaw being mounted on the second slide 120, the second jaw the other end to be tested umbilical cord stuck.

In detail, it is envisaged that a pulling arrangement comprises a pulling cable arrangement and a fastening component, with the fastening component and the umbilical cable to be tested being movably connected to one another, with one end of the pulling cable arrangement being connected to the fastening component, with another end of the pulling cable arrangement being connected to the connecting rod arrangement is. In the present embodiment, it is envisaged that the traction cable assembly adopts a lock chain.

Provision is also made for the first pulling arrangement 21 and the second pulling arrangement 22 to be provided symmetrically to one another along a longitudinal direction of the umbilical cable to be tested, with the first pulling arrangement 21 comprising a first pulling rope and a first fastening element, with the second pulling arrangement 22 comprising a second pulling rope and a second attachment member, wherein the first lift cord is connected to the first attachment member, wherein the second lift cord is connected to the second attachment member.

It should be noted that the displacement sensor unit comprises a mounting seat assembly and a displacement sensor assembly, the mounting seat assembly being mounted on the transom 1, the displacement sensor assembly being mounted on the mounting seat assembly.

In detail, it is envisaged that the displacement sensor arrangement comprises a first displacement sensor 41 and a second displacement sensor 42, the first displacement sensor 41 being located in the middle of the umbilical cable to be tested, the second displacement sensor 42 being located at any other location of the umbilical cable to be tested located.

In addition, it is envisaged that the end of the first guide rail assembly 10 is provided with a first limit stop, the first limit stop limiting movement of an end of the umbilical cable to be tested, one end of the second guide rail assembly 20 having a second limit tongue stop is provided, wherein the second limit stop limits a movement of the connecting rod assembly.

Example 2

• Schritt S1, das Ende des zu testenden Nabelkabels wird fixiert, wobei gleichzeitig, wenn das zu testende Nabelkabel durch äußere Kraft verformt wird, das Ende des zu testenden Nabelkabels immer in der gleichen horizontalen Richtung gehalten wird;
• Schritt S2, gleiche Zugkraft F auf das zu testende Nabelkabel an zwei entlang der Mitte symmetrischen Positionspunkten aufbringen, um das zu testende Nabelkabel zu biegen, wobei die Richtung der Zugkraft F senkrecht zur Längsrichtung des zu testenden Nabelkabels ist, wenn es gerade ist;
• Schritt S3, die Größe der Zugkraft F wird gemessen, wobei der geradlinige Abstand L1 zwischen den beiden Positionspunkten gemessen wird, wobei ein geradliniger Abstand L2 zwischen den beiden Positionspunkten und dem Ende des zu testenden Nabelkabels gemessen wird, wobei der Verschiebungsbetrag H1 eines beliebigen Positionspunktes auf des zu testenden Nabelkabels entlang der Zugkraftsrichtung und der maximale Verschiebungsbetrag H2 des zu testenden Nabelkabels entlang der Zugkraftsrichtung gemessen werden; Es sollte beachtet werden, dass die geradlinigen Abstände zwischen den beiden Positionspunkten und dem Ende des zu testenden Nabelkabels jeweils gleich sind, da die beiden Positionspunkte zueinander symmetrisch sind.
• Schritt S4, das Biegemoment und die Biegekrümmung werden gemäß F, L1, L2, H1, H2 berechnet, wobei die Formel zur Berechnung des Biegemoments lautet: M = F × L₂; die Formel zur Berechnung der Biegekrümmung lautet: $\mathrm{\phi }=\frac{8\left(\text{H2}-\text{H1}\right)}{L_1{}^2+4{\left(\text{H2}-\text{H1}\right)}^2};$
  
• Schritt S5, die Biegesteifigkeit errechnet sich aus dem Biegemoment und der Biegekrümmung, wobei die Formel zur Berechnung der Biegesteifigkeit lautet: $\text{EI}=\frac{M}{\mathrm{\phi }}.$
  
  Im Einzelnen umfasst das Verfahren zum Aufbringen der Zugkraft F auf das zu testende Nabelkabel in Schritt S2 spezifisch:
• Schritt S21, die zwei Positionspunkte werden gleichzeitig über die erste Zuganordnung 21 und die zweite Zuganordnung 22 mit der Verbindungsstangenanordnung verbunden, und eine Zugkraft f wird auf die Verbindungsstangenanordnung aufgebracht, so dass das zu testende Nabelkabel unter Kraft gebogen wird, wobei in ähnlicher Weise die Richtung der Zugkraft f senkrecht zur Längsrichtung des zu testenden Nabelkabels ist, wenn es gerade ist;
• Schritt S22, die Größe der Zugkraft f wird gemessen, aus der hervorgeht, dass die Zugkraft F an zwei entlang der Mitte symmetrischen Positionspunkten auf dem zu testenden Nabelkabel beträgt: $\text{F}=\frac{ƒ}{2}.$
  

The utility model also discloses an umbilical cable bending stiffness testing method using the umbilical cable bending stiffness testing apparatus as described above to test the umbilical cable to be tested, the testing method comprising the following steps:

• Step S1, the end of the umbilical cable to be tested is fixed, at the same time, when the umbilical cable to be tested is deformed by external force, the end of the umbilical cable to be tested is always kept in the same horizontal direction;
• Step S2, apply equal tensile force F to the umbilical cable to be tested at two position points symmetrical along the center to bend the umbilical cable to be tested, the direction of the tensile force F being perpendicular to the longitudinal direction of the umbilical cable to be tested when it is straight;
• Step S3, the magnitude of the tensile force F is measured, measuring the straight-line distance L1 between the two position points, measuring a straight-line distance L2 between the two position points and the end of the umbilical cable to be tested, measuring the displacement amount H1 of any position point of the umbilical cable to be tested along the tensile force direction and the maximum displacement amount H2 of the umbilical cable to be tested along the tensile force direction are measured; It should be noted that the straight-line distances between the two location points and the end of the umbilical cord under test are equal, since the two location points are symmetrical to each other.
• Step S4, the bending moment and the bending curvature are calculated according to F, L1, L2, H1, H2, where the formula for calculating the bending moment is: M=F×L ₂ ; the formula for calculating the bending curvature is: $\mathrm{\phi }=\frac{\mathrm{8th}\left(\text{H2}-\text{H1}\right)}{L_1{}^2+4{\left(\text{H2}-\text{H1}\right)}^2};$
  
• Step S5, the flexural rigidity is calculated from the bending moment and the bending curvature, where the formula for calculating the flexural rigidity is: $\text{EGG}=\frac{M}{\mathrm{\phi }}.$
  
  More specifically, the method of applying the tensile force F to the umbilical cable to be tested in step S2 specifically includes:
• Step S21, the two position points are simultaneously connected to the connecting rod assembly via the first pulling assembly 21 and the second pulling assembly 22, and a tensile force f is applied to the connecting rod assembly so that the umbilical cable to be tested is bent under force, similarly changing the direction the tensile force f is perpendicular to the longitudinal direction of the umbilical cable to be tested when it is straight;
• Step S22, the magnitude of the tensile force f is measured, showing that the tensile force F at two symmetric position points along the center on the umbilical cable to be tested is: $\text{f}=\frac{ƒ}{2}.$
  

Based on this, it proceeds to steps S3, S4 and S5 to calculate and obtain the bending stiffness of the umbilical cable.

On the other hand, the data obtained from the above tests are all uploaded to the control terminal, the control terminal system can perform calculations to obtain the bending moment and bending curvature to create a Cartesian coordinate system, with the ordinate representing the bending moment and the abscissa representing the bending curvature, the data fitting is performed by the control terminal system, and finally the bending stiffness of the umbilical cable is obtained.

In summary, a device for testing the bending stiffness of the umbilical cable is claimed in the utility model, by setting the clamping section and the first guide rail assembly, the clamping section can clamp both ends of the umbilical cable to be tested, the clamping section being slidably connected to the first guide rail assembly, whereby, when the umbilical cable to be tested deforms under load, its both ends can move on the first guide rail assembly, the testing apparatus also being provided with a drive unit and a sensor unit, the first drive section of the drive unit being able to pull the umbilical cable to be tested, to bend and deform it, and wherein the first drive section applies a force to the umbilical cable to be tested through the connecting rod assembly, wherein the connecting rod assembly is connected to the umbilical cable to be tested, and wherein the connection position is symmetrical about the center along the umbilical cable to be tested, where the sensor unit can measure the displacement data and tensile force data of the umbilical cable to be tested and upload them to the control terminal, the bending rigidity of the umbilical cable to be tested is obtained by calculating the data obtained from the test, the apparatus and method for testing the bending rigidity of the umbilical cable of the present utility model can improve the accuracy of the inspection data, and the inspection process is simple, saving manpower and further improving the inspection efficiency.

Obviously, the above-mentioned embodiments are only examples for clear description and are not intended to limit the implementation. Also, other modifications or variations in various forms are possible for one of ordinary skill in the art based on the above description. It is not necessary and impossible to exhaustively enumerate all the embodiments here. Rather, the derived obvious changes or variations are still within the scope of protection of the utility model.

Claims (10)

An umbilical cable bending rigidity testing apparatus, characterized in that the apparatus comprises: a frame body including a transom (1) and a first guide rail assembly (10) provided along a longitudinal direction of the transom (1), the first guide rail assembly (10) is provided with a clamping section, the clamping section serving to clamp the umbilical cable to be tested, the clamping section being slidably connected to the first guide rail arrangement (10), the clamping section having a first clamping section (11) and a second clamping section (12) includes; a drive unit comprising a connecting rod assembly, a second guide rail assembly (20) and a first drive section, the second guide rail assembly (20) being provided on the transom, a longitudinal direction of the second guide rail assembly (20) perpendicular to a longitudinal direction of the first guide rail assembly (10 ), wherein the connecting rod assembly is slidably connected to the second guide rail assembly (20), wherein a longitudinal direction of the connecting rod assembly is parallel to the longitudinal direction of the transom (1), wherein the connecting rod assembly is connected to the umbilical cable to be tested by pulling assemblies, and wherein the pulling assemblies are symmetrical are provided to each other, the first drive section being connected to a central part of the connecting rod assembly, the first driving section driving and moving the connecting rod assembly along the second guide rail assembly (20); a sensor unit comprising a displacement sensor unit and a tensile force sensor (3), wherein when the umbilical cable to be tested is straight, the displacement sensor unit is in contact with the umbilical cable to be tested, the displacement sensor unit serving to measure a displacement along a height direction of the frame body when the umbilical cable to be tested is deformed, wherein one end of the tension sensor (3) is connected to the first drive section and another end is connected to the connecting rod assembly. Device for testing the bending stiffness of the umbilical cable claim 1 characterized in that the connecting rod assembly comprises a mounting plate (23) and a connecting column, the connecting column being mounted on the fixing plate, a pull assembly being connected to the connecting column, the fixing plate (23) being connected to the first drive section. Device for testing the bending stiffness of the umbilical cable claim 2 , characterized in that the first driving section comprises a screw jack (26) and a support base (27), the screw jack (26) being provided on the support base (27), the screw jack (26) being connected to the mounting plate (23). . Device for testing the bending stiffness of the umbilical cable claim 1 , characterized in that the first clamping portion comprises a first slide and a first jaw (110), the first slide being slidably connected to the first track assembly (10), the first jaw (110) being mounted on the first slide, wherein the first jaw (110) clamps the umbilical cable to be tested; wherein a setting method of the second clamp portion (12) is the same as that of the first clamp portion (11). Device for testing the bending stiffness of the umbilical cable claim 1 , characterized in that a traction assembly comprises a traction cable assembly and a mounting component, wherein the mounting component and the umbilical cable to be tested are movably connected to each other, wherein one end of the traction cable assembly is connected to the mounting component, wherein another end of the traction cable assembly is connected to the connecting rod assembly. Device for testing the bending stiffness of the umbilical cable claim 5 , characterized in that the pulling arrangements comprise a first pulling arrangement (21) and a second pulling arrangement (22), the first pulling arrangement (21) and the second pulling arrangement (22) being provided symmetrically to one another along a longitudinal direction of the umbilical cable to be tested, the first A traction assembly (21) comprises a first traction cable and a first fastener connected together, wherein the second traction assembly (22) comprises a second traction cable and a second fastener connected together. Device for testing the bending stiffness of the umbilical cable claim 1 , characterized in that the displacement sensor unit comprises a mounting seat assembly and a displacement sensor assembly, the mounting seat assembly being mounted on the transom (1), the displacement sensor assembly being mounted on the mounting seat assembly. Device for testing the bending stiffness of the umbilical cable claim 7 , characterized in that the displacement sensor arrangement comprises a first displacement sensor (41) and a second displacement sensor (42), the first displacement sensor being located at a center of the umbilical cable to be tested, the second displacement sensor (42) being located at any other location of the umbilical cable to be tested is located. Device for testing the bending stiffness of the umbilical cable claim 1 , characterized in that one end of the first guide rail assembly (10) is provided with a first limit stop, the first limit stop limiting a movement of an end of the umbilical cable to be tested. Device for testing the bending stiffness of the umbilical cable claim 1 , characterized in that one end of the second guide rail assembly (20) is provided with a second limit stop, the second limit stop limiting movement of the connecting rod assembly.

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