Experimental equipment for testing bearing capacity of towing anchor

Abstract

The utility model relates to the technical field of ocean engineering, and discloses experimental equipment for testing the bearing capacity of a towing anchor, which comprises a loading unit and a testing unit, the loading unit is used for applying tensile force to the towing anchor, and the testing unit is used for fixing and measuring the towing anchor; the loading unit comprises a tension bar and a power device, and the power device is connected with the tension bar and provides power for the tension bar to linearly reciprocate along the horizontal direction; the dragging anchor comprises an anchor plate and an anchor rod arranged on the anchor plate; the anchor rod is connected with the tension rod; the test unit comprises a strain gauge, a base, a supporting seat arranged at one end of the base and a clamping groove seat arranged at the other end of the base; the supporting seat is used for supporting the tension bar, and the tension bar can linearly move on the supporting seat in a reciprocating mode. The device has the beneficial effect that the bearing capacity of the towing anchor can be accurately tested.

Description

Technical Field

[0001] The utility model relates to the technical field of ocean engineering, and relates to an experimental device for testing the bearing capacity of a drag anchor. Background Art

[0002] A drag anchor is a commonly used anchoring device in the mooring system of ocean engineering, mainly used for fixing marine facilities such as ships and platforms. Its design and performance are directly related to the safety and stability of marine structures. In practical applications, the models and working conditions of drag anchors are diverse and need to withstand large tensile forces. Therefore, its bearing capacity and stability are important indicators to measure its performance. In order to ensure the safety performance of the drag anchor and the safety and stability of the ocean platform, it is necessary to test its bearing capacity. Content of the Utility Model

[0003] Aiming at the problems existing in the prior art, the utility model provides an experimental device for testing the bearing capacity of a drag anchor, which can accurately test the bearing capacity of the drag anchor.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] An experimental device for testing the bearing capacity of a drag anchor, comprising a loading unit and a test unit; the loading unit is used to apply a tensile force to the drag anchor, and the test unit is used to fix and measure the drag anchor; the loading unit includes a tension rod and a power device, the power device is connected to the tension rod and provides power for the tension rod to perform linear reciprocating motion in the horizontal direction; the drag anchor includes an anchor plate and an anchor rod arranged on the anchor plate; the anchor rod is connected to the tension rod; the test unit includes a strain gauge, a base, a support seat arranged at one end of the base, and a clamping groove seat arranged at the other end of the base; the support seat is used to support the tension rod, and the tension rod can perform linear reciprocating motion on the support seat; the clamping groove seat is arranged in a matching manner with the anchor plate and is used to fix the anchor plate; the strain gauge is arranged on the anchor plate and at the contact position between the upper surface of the anchor plate and the clamping groove seat, and the strain gauge is used to collect the strain data of the drag anchor in real time during the process of being pulled by the tension rod.

[0006] Further, the clamping groove seat is provided with a fixed clamping groove matching with the anchor plate, and the anchor plate is fixed by installing the anchor plate in the fixed clamping groove.

[0007] Further, the power device includes a hydraulic cylinder, a hydraulic pump built in the hydraulic cylinder, and a piston rod matching with the hydraulic cylinder, and the hydraulic pump is used to drive the piston rod to perform telescopic motion; the power device further includes a first fixing plate and a second fixing plate, the piston rod is connected to the first fixing plate, one end of the tension rod is connected to the first fixing plate, and the other end sequentially passes through the support seat and is connected to the second fixing plate, and the second fixing plate is connected to the anchor rod.

[0008] Further, a pulley is provided on the second fixed plate. The pulley can slide on the base. The pulley is used to support the second fixed plate while better realizing the horizontal linear movement of the second fixed plate along with the tension rod.

[0009] Further, the drag anchor further includes an anchor chain and a shackle. One end of the anchor chain is connected to the end of the anchor rod through the shackle, and the other end of the anchor chain is connected to the tension rod. The shackle is used to connect the anchor chain and the anchor rod.

[0010] Further, a connection buckle is provided on the second fixed plate. The connection buckle is connected to the anchor chain. The tension rod drives the second fixed plate to realize the tension process of the drag anchor.

[0011] Further, the experimental equipment of the present invention further includes a computer. The computer is respectively communicatively connected to the strain gauge and the hydraulic cylinder. The hydraulic cylinder is used to transmit the working pressure during the test and the tension value acting on the drag anchor to the computer in real time. The strain gauge is used to transmit the strain data collected in real time during the process of the drag anchor being subjected to tension to the computer. The computer is used to receive the working pressure of the hydraulic cylinder, the tension value acting on the drag anchor, and the strain data during the process of the drag anchor being subjected to tension, and uses the data processing software in the prior art to obtain the stress-strain relationship of the drag anchor under different loads, and further obtain the bearing capacity of the drag anchor under different loads.

[0012] Further, the experimental equipment of the present invention further includes an installation unit. The installation unit is used to realize the installation and disassembly of the drag anchor.

[0013] Further, the installation unit includes a hoisting cable, a support frame, a transverse slide rail provided on the support frame, and a crane capable of sliding on the transverse slide rail. The hoisting cable is connected to the crane. The hoisting cable is also connected to the anchor plate. The crane is used to hoist the drag anchor.

[0014] Further, the installation unit further includes a movable pulley block. The hoisting cable is connected to the crane through the movable pulley block.

[0015] Further, the movable pulley block includes two symmetrically arranged movable pulleys, a connecting rod, and a sling. The two movable pulleys are connected to the crane. The two ends of the connecting rod are respectively connected to the two movable pulleys. A sling is provided in the middle of the connecting rod. The hoisting cable is respectively connected to the sling and the anchor plate. The crane controls the movable pulley block to realize the loading and unloading of the anchor through the connection with the movable pulley.

[0016] Further, the two movable pulleys are respectively welded to both ends of the connecting rod. A sling is welded in the middle of the connecting rod. The hoisting cable is annular and passes through the sling, and the two ends are respectively connected to both sides of the anchor plate.

[0017] Compared with the prior art, the utility model provides an experimental device for testing the bearing capacity of a drag anchor, which has the following beneficial effects:

[0018] (1) The utility model is a test experimental device for the bearing capacity of a drag anchor, including a loading unit, a test unit, an installation unit, etc., and can accurately test the bearing capacity of the drag anchor.

[0019] (2) The utility model has innovation, practicability and operability. By testing the bearing capacity of the drag anchor, it helps to evaluate the bearing capacity and stability of the drag anchor, ensures that the drag anchor with a high bearing capacity is applied to the corresponding mooring system, and thus guarantees the safe and reliable operation of the mooring system using the drag anchor.

[0020] (3) The utility model can be widely applied to the research on the bearing capacity of drag anchors in oil and gas development platforms, floating wave energy power generation devices, sea airports, offshore wind farms, etc.; and the experimental device of the utility model has fast testing, convenient installation, easy maintenance and low cost; the testing method of the utility model is fast and convenient. Description of the Drawings

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the experimental device in this embodiment;

[0022] Figure 2 It is a structural schematic diagram of the assembly of the drag anchor and the fixed card slot in this embodiment (the connection situation between the end of the anchor rod and the shackle is not shown in the figure).

[0023] The meanings of the reference numerals in the figure:

[0024] 1 - Loading unit; 11 - Hydraulic cylinder; 12 - Hydraulic pump; 13 - Piston rod; 14 - First fixing plate; 15 - Tension rod; 16 - Second fixing plate; 161 - Connection buckle; 17 - Pulley; 2 - Test unit; 21 - Base; 22 - Support seat; 23 - Card slot seat; 231 - Fixed card slot; 24 - Strain gauge; 3 - Installation unit; 31 - Support frame; 32 - Horizontal slide rail; 33 - Crane; 34 - Movable pulley block; 35 - Lifting cable; 4 - Drag anchor; 41 - Anchor plate; 42 - Anchor rod; 43 - Anchor chain; 44 - Shackle; 5 - Computer. Detailed Embodiment

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0026] Example 1

[0027] As Figure 1 and Figure 2 shown, the experimental equipment proposed in this embodiment includes a loading unit 1 and a test unit 2; the loading unit 1 is used to apply a pulling force to the drag anchor 4, and the test unit 2 is used to fix and measure the drag anchor 4; the loading unit 1 includes a tension rod 15 and a power device, the power device is connected to the tension rod 15 and provides power for the tension rod 15 to perform a linear reciprocating motion in the horizontal direction; the drag anchor 4 includes an anchor plate 41 and an anchor rod 42 provided on the anchor plate 41; the anchor rod 42 is connected to the tension rod 15; the test unit 2 includes a strain gauge 24, a base 21, a support seat 22 provided at one end of the base 21, and a card slot seat 23 provided at the other end of the base 21; the support seat 22 is used to support the tension rod 15, and the tension rod 15 can reciprocate linearly on the support seat 22; the card slot seat 23 is arranged in a matching manner with the anchor plate 41 and is used to fix the anchor plate 41; the strain gauge 24 is arranged on the anchor plate 41 and at the contact position between the upper surface of the anchor plate 41 and the card slot seat 23, and the strain gauge 24 is used to collect the strain data of the drag anchor 4 in real time during the process of being pulled by the tension rod 15.

[0028] In a specific implementation manner of this embodiment, a fixed card slot 231 matching the anchor plate 41 is provided on the card slot seat 23, and the anchor plate 41 is fixed by installing the anchor plate 41 in the fixed card slot 231.

[0029] In a specific implementation manner of this embodiment, the drag anchor 4 further includes an anchor chain 43 and a shackle 44. One end of the anchor chain 43 is connected to the end of the anchor rod 42 through the shackle 44, and the other end of the anchor chain 43 is connected to the tension rod 15. The shackle 44 is used to connect the anchor chain 43 and the anchor rod 42.

[0030] In a specific implementation manner of this embodiment, the power device includes a hydraulic cylinder 11, a hydraulic pump 12 built in the hydraulic cylinder 11, and a piston rod 13 matching the hydraulic cylinder 11. The hydraulic pump 12 is used to drive the piston rod 13 to perform telescopic motion; the power device further includes a first fixing plate 14 and a second fixing plate 16. The piston rod 13 is connected to the first fixing plate 14, one end of the tension rod 15 is connected to the first fixing plate 14, and the other end passes through the support seat 22 and is connected to the second fixing plate 16 in sequence. The second fixing plate 16 is connected to the anchor rod 42. A connecting buckle 161 is provided on the second fixing plate 16, and the connecting buckle 161 is connected to the anchor chain 43. The tension rod 15 drives the second fixing plate 16 to realize the process of the drag anchor 4 being pulled.

[0031] In a specific implementation manner of this embodiment, a pulley 17 is provided on the second fixing plate 16. The pulley 17 can slide on the base 21. The pulley 17 is used to better realize the horizontal linear motion of the second fixing plate 16 along with the tension rod 15 while supporting the second fixing plate 16.

[0032] Example 2

[0033] The difference between Example 2 and Example 1 is that: the experimental equipment in Example 2 further includes a computer 5. As Figure 1 shown, the computer 5 is respectively communicatively connected to the strain gauge 24 and the hydraulic cylinder 11. The hydraulic cylinder 11 is used to transmit to the computer 5 in real time its working pressure and the pulling force value acting on the drag anchor 4 during the test process; the strain gauge 24 is used to transmit the strain data during the process of the drag anchor 4 being pulled to the computer 5 in real time; the computer 5 is used to receive the working pressure of the hydraulic cylinder 11, the pulling force value acting on the drag anchor 4, and the strain data during the process of the drag anchor 4 being pulled, and uses the data processing software in the prior art to obtain the stress-strain relationship of the drag anchor 4 under different loads, and further obtains the bearing capacity of the drag anchor 4 under different loads.

[0034] Example 3

[0035] The difference between Example 3 and Example 2 is that: the experimental equipment in Example 3 further includes an installation unit 3. As Figure 1 shown, the installation unit 3 is used to realize the installation and disassembly of the drag anchor 4.

[0036] In a specific implementation manner of this embodiment, the installation unit 3 includes a hoisting cable 35, a support frame 31, a transverse slide rail 32 provided on the support frame 31, and a crane 33 that can slide on the transverse slide rail 32. The hoisting cable 35 is connected to the crane 33, and the hoisting cable 35 is also connected to the anchor plate 41. The crane 33 is used to lift the drag anchor 4.

[0037] In a specific implementation manner of this embodiment, the installation unit 3 further includes a movable pulley block 34. The hoisting cable 35 is connected to the crane 33 through the movable pulley block 34.

[0038] In a specific implementation manner of this embodiment, the movable pulley block 34 includes two symmetrically arranged movable pulleys, a connecting rod, and a sling; the two movable pulleys are connected to the crane 33; both ends of the connecting rod are respectively connected to the two movable pulleys, a sling is provided in the middle of the connecting rod, and the hoisting cable 35 is respectively connected to the sling and the anchor plate 41. The crane 33 controls the movable pulley block 34 to realize the loading and unloading of the anchor through the connection with the movable pulley.

[0039] In a specific implementation manner of this embodiment, the two movable pulleys are respectively welded to both ends of the connecting rod, a sling is welded in the middle of the connecting rod, the hoisting cable 35 is annular, passes through the sling, and both ends are respectively connected to both sides of the anchor plate 41.

[0040] The test method of the experimental equipment for the bearing capacity of the drag anchor proposed in this embodiment is as follows:

[0041] Step S1: Preparation stage.

[0042] In step S11, check and confirm the good condition and calibration of all components of the loading unit 1, the test unit 2, and the installation unit 3.

[0043] In step S12, connect the anchor rod 42 to the tension rod 15 through the anchor chain 43 at the shackle 44 to ensure a reliable connection.

[0044] In step S13, install a strain gauge 24 at the contact point between the anchor plate 41 of the drag anchor 4 and the fixed card slot 231, and connect it to the existing data acquisition system of the computer 5.

[0045] In step S14, set the tension parameter and loading rate of the hydraulic cylinder 11.

[0046] Step S2: Lifting and installation stage: Use the crane 33 and the transverse slide rail 32 to control the position of the drag anchor 4.

[0047] In step S21, connect the anchor plate 41 to the movable pulley block 34 through the lifting cable 35 to ensure the safety and reliability of the connection point to prevent detachment or sliding during the lifting process.

[0048] In step S22, slide the movable pulley block 34 and the connected drag anchor 4 smoothly along the transverse slide rail 32 to directly above the fixed card slot 231. During this process, it is necessary to control the moving speed and position of the movable pulley block 34 to ensure that the anchor plate 41 is accurately aligned. The function of the transverse slide rail 32 is to provide a stable moving track for the movable pulley block 34 and reduce the swinging and unstable factors during the lifting process.

[0049] In step S23, after the anchor plate 41 is aligned with the fixed card slot 231, slowly release the crane 33 to make the anchor plate 41 descend smoothly until the anchor plate 41 contacts the fixed card slot 231 and is accurately installed in the fixed card slot 231 to ensure the firm connection between the anchor plate 41 and the fixed card slot 231.

[0050] In step S24, after the anchor plate 41 is completely installed in the fixed card slot 231, conduct an inspection to ensure that the position of the anchor plate 41 is correct and all connecting parts are tightened before starting the subsequent test work.

[0051] Step S3: Testing stage.

[0052] In step S31, turn on the power of the loading device to start the hydraulic cylinder 11. At this time, the built-in hydraulic pump 12 starts to work. By applying pressure on the piston rod 13, the piston rod 13 is pushed to achieve a linear reciprocating motion in the horizontal direction. Finally, this force is transmitted to the drag anchor 4 through the connecting member tension rod 15, thereby pulling the drag anchor 4;

[0053] Step S32: Apply a tensile force to the drag anchor 4 according to the preset test condition parameters.

[0054] Step S33: Monitor the pressure and tensile force values of the hydraulic cylinder 11 to ensure they meet the preset test parameters.

[0055] Step S34: Collect the strain data of the drag anchor 4 during the force application process in real time through the strain gauge 24, and transmit it to the existing data acquisition system of the computer 5.

[0056] Step S35: If the drag anchor 4 reaches the design load or abnormal conditions occur, stop the test immediately.

[0057] Step S4: Data recording and analysis stage.

[0058] Step S41: Collect all key data during the entire test process, including the working pressure of the hydraulic cylinder 11, the tensile force value, and the strain data of the drag anchor 4.

[0059] Step S42: Use the existing data analysis software in the computer 5 to process the data, and obtain the stress-strain relationship and bearing capacity of the drag anchor 4 under different loads.

[0060] Step S43: Evaluate the performance of the drag anchor 4 according to the analysis results, and compare it with the design standards and safety requirements.

[0061] Step S5: End stage.

[0062] Step S51: Terminate the operation of the hydraulic cylinder 11 and unload the tensile force on the drag anchor 4.

[0063] Step S52: Start the crane 33 and remove the drag anchor 4 from the fixed card slot 231.

[0064] Step S53: Clean the test area to ensure the cleanliness of the site and equipment.

[0065] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0066] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An experimental device for testing the bearing capacity of a towing anchor, characterized in that: It comprises a loading unit and a test unit; the loading unit is used for applying tension to the towing anchor, and the test unit is used for fixing and measuring the towing anchor; the loading unit comprises a tension rod and a power device, the power device is connected to the tension rod, and provides power for the tension rod to reciprocate in a horizontal direction; the towing anchor comprises an anchor plate and an anchor rod arranged on the anchor plate; the anchor rod is connected to the tension rod; the test unit comprises a strain gauge, a base, a support seat arranged at one end of the base, and a slot seat arranged at the other end of the base; the support seat is used for supporting the tension rod, and the tension rod can reciprocate in a straight line on the support seat; the slot seat is matched with the anchor plate and used for fixing the anchor plate; the strain gauge is arranged on the anchor plate, and is arranged at the contact point between the upper surface of the anchor plate and the slot seat, and the strain gauge is used for real-time collection of strain data of the towing anchor during the process of being subjected to tension of the tension rod.

2. The experimental equipment for testing the load-bearing capacity of a towing anchor according to claim 1, characterized in that: The slot seat is provided with a fixing slot matching the anchor plate, and the anchor plate is fixed by installing the anchor plate in the fixing slot.

3. The experimental equipment for testing the load-bearing capacity of a towing anchor according to claim 1, characterized in that: The power device includes a hydraulic cylinder, a hydraulic pump built into the hydraulic cylinder, and a piston rod matched with the hydraulic cylinder, and the hydraulic pump is used to drive the piston rod to telescopic movement; the power device also includes a first fixed plate and a second fixed plate, the piston rod is connected to the first fixed plate, one end of the tension rod is connected to the first fixed plate, and the other end passes through the support seat in turn and is connected to the second fixed plate, and the second fixed plate is connected to the anchor rod.

4. The experimental equipment for testing the load-bearing capacity of a towing anchor according to claim 3, characterized in that: The second fixing plate is provided with a pulley, which can slide on the base, and is used to better realize the horizontal linear movement of the second fixing plate along with the tension rod while supporting the second fixing plate.

5. The experimental equipment for testing the load-bearing capacity of a towing anchor according to claim 1, characterized in that: The towing anchor also includes an anchor chain and a shackle, one end of the anchor chain is connected to the end of the anchor rod through the shackle, and the other end of the anchor chain is connected to the tension rod.

6. The experimental equipment for testing the load-bearing capacity of a towing anchor according to claim 1, characterized in that: The invention also includes a computer, which is communicatively connected with the strain gauge and the hydraulic cylinder respectively. The hydraulic cylinder is used to transmit its working pressure and the tension value acting on the towing anchor during the test to the computer in real time; the strain gauge is used to transmit the strain data collected in real time during the process of the towing anchor being subjected to tension to the computer; the computer is used to receive the working pressure of the hydraulic cylinder, the tension value acting on the towing anchor and the strain data during the process of the towing anchor being subjected to tension, so as to obtain the stress-strain relationship of the towing anchor under different loads.

7. The experimental equipment for testing the load-bearing capacity of a towing anchor according to claim 1, characterized in that: It also includes an installation unit, which is used to install and remove the towing anchor.

8. The experimental equipment for testing the load-bearing capacity of a towing anchor according to claim 7, characterized in that: The installation unit includes a lifting cable, a support frame, a transverse slide rail arranged on the support frame, and a crane capable of sliding on the transverse slide rail. The lifting cable is connected to the crane, and the lifting cable is also connected to the anchor plate. The crane is used to lift the towing anchor.

9. The experimental equipment for testing the load-bearing capacity of a towing anchor according to claim 8, characterized in that: The installation unit also includes a movable pulley block, and the hoisting cable is connected to the crane via the movable pulley block.

10. The experimental equipment for testing the load-bearing capacity of a towing anchor according to claim 9, characterized in that: The movable pulley block comprises two symmetrically arranged movable pulleys, a connecting rod and a lifting ring; the two movable pulleys are connected to a crane; the two ends of the connecting rod are respectively connected to the two movable pulleys, a lifting ring is arranged in the middle of the connecting rod, and the lifting cables are respectively connected to the lifting ring and the anchor plate.

Images