CN210136050U - A centrifugal model test device for simulating ship anchor falling - Google Patents

Abstract

The utility model discloses a centrifugal model test device for simulating ship anchor falls, including the bottom plate of fixed connection at model box top portion, fixed mounting has hydraulic cylinder on the bottom plate, be connected with displacement sensor on hydraulic cylinder, be connected with drive disk assembly on hydraulic cylinder's telescopic link, drive disk assembly passes through the connecting rod and is connected with the drag hook, the both ends of connecting rod are articulated with drive disk assembly and drag hook respectively, the middle part of drag hook articulates on the supporting seat, the border at the bottom plate is fixed to the supporting seat, before the experiment begins, hydraulic cylinder is in the shrink state, the drag hook is in the perk state, hang the ship anchor model that is located outside the bottom plate on the drag hook. The utility model discloses a simulation that one set of link mechanism motion realized the ship anchor process of falling is closer with actual conditions more, and the simulation result is more accurate reliable. The hydraulic power drive is adopted, so that the test working efficiency can be improved; simple structure, reliable performance and simple manufacture.

Description

A centrifugal model test device for simulating ship anchor falling

technical field

The utility model relates to a simulation test device, in particular to a centrifugal model test device for simulating the falling of an anchor.

Background technique

Subsea pipelines are the main medium for transporting oil and gas, and ensuring their safety during operation is the key to smooth offshore oil and gas development. With the surge of human marine activities, part of the pipeline laying area overlaps with the ship's operation area. Ships operate at sea with relatively strong randomness. Accidental anchoring operations become more and more frequent. It is inevitable that anchoring accidents will occur, causing impact damage to pipelines. . Once the submarine pipeline is damaged and leaks, it will cause environmental pollution and economic loss.

The laying depth of submarine pipelines in domestic waters is basically within 100m. For example, the sea area of Zhoushan is usually 20-70m, and the sea area of Fujian is usually 30-50m. In the history of submarine pipeline damage, anchor damage accounts for 1/3 of the total damage to submarine pipelines caused by human factors. Most of the damage to submarine pipelines by anchors occurs in sea areas with a water depth of less than 200m, especially in near-shore areas, where anchor damage is more serious.

In order to avoid damage to the pipeline by third-party activities, it is necessary to carry out a reliability and risk analysis. The existing method is based on the numerical simulation method to carry out the risk analysis of the submarine pipeline caused by the falling of the anchor. A physical model test device is urgently needed to simulate the process of the falling of the anchor, so as to verify the accuracy of the numerical simulation analysis results.

SUMMARY OF THE INVENTION

The utility model provides a centrifugal model test device for simulating the falling of a ship anchor in order to solve the technical problems existing in the known technology.

The technical scheme adopted by the utility model to solve the technical problems existing in the known technology is: a centrifugal model test device for simulating the falling of an anchor, comprising a bottom plate fixedly connected to the top of the model box, and fixedly installed on the bottom plate There is a hydraulic cylinder, a displacement sensor is connected to the hydraulic cylinder, and a transmission component is connected to the telescopic rod of the hydraulic cylinder. The transmission component is connected to the hook through a connecting rod, and both ends of the connecting rod are respectively connected to The transmission part and the hook are hinged, the middle of the hook is hinged on the support seat, and the support seat is fixed on the edge of the bottom plate. Before the test starts, the hydraulic cylinder is in a retracted state, and the hook is in a raised state. In the state, the anchor model outside the bottom plate is hung on the draw hook.

A displacement positioning piece opposite to the displacement sensor is fixed on the telescopic rod of the hydraulic cylinder, and a roller is fixed on the displacement positioning piece, the roller is installed in a linear guide groove, and the linear guide groove is fixed On the base plate, the linear guide groove is parallel to the telescopic direction of the hydraulic cylinder.

The displacement positioning piece is sleeved on the telescopic rod of the hydraulic oil cylinder, is located behind the transmission part, and is locked on the transmission part and the telescopic rod of the hydraulic oil cylinder through a lock nut.

At least two groups of hydraulic cylinder mounting holes with different positions are arranged on the base plate.

The rollers are made of rolling bearings.

The utility model has the advantages and positive effects that the simulation of the falling process of the anchor is realized through the movement of a set of connecting rod mechanisms, which is closer to the actual situation and the simulation results are more accurate and reliable. And the utility model is driven by hydraulic power, which can improve the test work efficiency; the structure is simple, the performance is reliable, and the manufacture is simple.

Description of drawings

Fig. 1 is the schematic diagram of the utility model application;

Fig. 2 is the three-dimensional structure schematic diagram of the utility model;

3 is a side view of the present utility model when the anchor model is in a hooked state;

Fig. 4 is a side view of the present invention when the anchor model is in a decoupling state.

In the picture: 1-1, bottom plate; 1-2, hydraulic cylinder mounting hole; 1-3, cylinder flange plate; 1-4, hydraulic cylinder; 1-5, displacement sensor; 1-6, top wire; 1- 7, lock nut; 1-8, displacement positioning piece; 1-9, roller; 1-10, linear guide groove; 1-11, transmission parts; 1-12, connecting rod; 1-13, hook; 1-14 , support seat; 1-15, anchor model; 2, fixed track; 3, model box.

Detailed ways

In order to further understand the content of the invention, features and effects of the present utility model, the following embodiments are exemplified and described in detail as follows in conjunction with the accompanying drawings:

Please refer to FIGS. 1 to 4 , a centrifugal model test device for simulating the falling of an anchor, including a bottom plate 1-1 fixedly connected to the top of the model box 3, and a hydraulic oil cylinder 1 is fixedly installed on the bottom plate 1-1 -4, a displacement sensor 1-5 is connected to the hydraulic cylinder 1-4, a transmission part 1-11 is connected to the telescopic rod of the hydraulic cylinder 1-5, and the transmission part 1-11 is connected through a connecting rod 1-12 is connected with the pull hook 1-13, the two ends of the connecting rod 1-12 are hinged with the transmission part 1-11 and the pull hook 1-13 respectively, and the middle part of the pull hook 1-13 is hinged on the support seat On 1-14, the support base 1-14 is fixed on the edge of the bottom plate 1-1. Before the test starts, the hydraulic cylinder 1-4 is in a retracted state, and the retractor 1-13 is in a raised state. An anchor model 1-15 located outside the bottom plate 1-1 is hung on the draw hook 1-13.

In this embodiment, a displacement positioning piece 1-8 opposite to the displacement sensor 1-5 is fixed on the telescopic rod of the hydraulic cylinder 1-4, and is fixed on the displacement positioning piece 1-8 There are rollers 1-9, the rollers 1-9 are installed in the linear guide groove 1-10, the linear guide groove 1-10 is fixed on the bottom plate 1-1, and the linear guide groove 1-10 is connected to the The expansion and contraction directions of the hydraulic cylinders 1-4 are parallel to prevent the telescopic rods and pistons of the hydraulic cylinders 1-4 from rotating when the centrifugal model test device rotates with the centrifuge, and the displacement positioning pieces 1-8 deviate from the displacement sensor 1. -5 measurement range, the displacement sensor 1-5 cannot measure the linear output displacement of the hydraulic cylinder 1-4. In this embodiment, the above-mentioned rollers 1-9 are made of rolling bearings. More specifically, the displacement sensor 1-5 is fixed on the oil cylinder flange plate 1-3 by means of a jacking wire 1-6. The displacement positioning piece 1-8 is sleeved on the telescopic rod of the hydraulic cylinder 1-4, the displacement positioning piece 1-8 is located behind the transmission component 1-11, and the displacement positioning piece 1-8 passes through The lock nut 1-7 is locked on the transmission component 1-11 and the telescopic rod of the hydraulic cylinder 1-4. The bottom plate 1-1 is provided with at least two sets of hydraulic cylinder mounting holes 1-2 with different positions, so as to adjust the installation positions of the hydraulic cylinders and realize the simulation test of dropping anchors at different positions.

During application, the above-mentioned centrifugal model test device is installed on the fixed track 2 on the top of the model box 1, and many threaded holes are arranged on the fixed track 2, so that the installation position of the above-mentioned centrifugal model test device can be adjusted, and it is convenient to realize the anchor drop at different positions. simulation test.

The various components of the centrifugal model test apparatus described above are made of Q345 low-alloy steel. Hydraulic cylinders 1-4 are model MOB50x150.

The working principle of the present invention:

Before the start of the test, the hydraulic cylinder 1-4 is in a retracted state, at this time, the hook 1-13 is lifted, and the anchor model 1-15 will not fall on the hook 1-13. According to the requirements of the test plan, after reaching the predetermined time, push the hydraulic cylinder 1-4 to extend forward, and the connecting rod 1-12 drives the hook 1-13 to turn forward. At this time, the anchor model 1-15 is unhooked and falls into the soil in the model box 1. Ostensibly, a simulation of the anchor drop test procedure was performed.

By installing different anchor models or changing the installation position of the whole set of devices and changing the installation position of the hydraulic cylinder and the support seat, the simulation of the falling process of different anchors in different positions can be realized. The simulation of the falling process of the anchor through the device has the characteristics of being realistic and flexible in changing the position and the type of the anchor.

Although the preferred embodiments of the present utility model have been described above in conjunction with the accompanying drawings, the present utility model is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive. Under the inspiration of the present utility model, those of ordinary skill can also make many forms without departing from the scope of protection of the present utility model and the claims, which all belong to the protection scope of the present utility model.

Claims (5)

1. The utility model provides a centrifugal model test device for simulating ship anchor falls, its characterized in that, includes the bottom plate of fixed connection at model box top fixed mounting has hydraulic cylinder on the bottom plate be connected with displacement sensor on the hydraulic cylinder be connected with drive disk assembly on hydraulic cylinder's the telescopic link, drive disk assembly passes through the connecting rod and is connected with the drag hook, the both ends of connecting rod respectively with drive disk assembly with the drag hook is articulated, the middle part of drag hook articulates on the supporting seat, the supporting seat is fixed before the experiment begins, hydraulic cylinder is in the shrink state, the drag hook is in the perk state hang on the drag hook and be located ship anchor model outside the bottom plate.

2. The centrifugal model test device for simulating ship anchor falling as claimed in claim 1, wherein a displacement positioning plate opposite to the displacement sensor is fixedly connected to a telescopic rod of the hydraulic cylinder, a roller is fixedly connected to the displacement positioning plate, the roller is installed in a linear guide groove, the linear guide groove is fixed on the bottom plate, and the linear guide groove is parallel to the telescopic direction of the hydraulic cylinder.

3. The centrifugal model test device for simulating ship anchor falling of claim 2, wherein the displacement positioning plate is sleeved on the telescopic rod of the hydraulic oil cylinder, is positioned behind the transmission part, and is locked on the transmission part and the telescopic rod of the hydraulic oil cylinder through a lock nut.

4. The centrifugal model test device for simulating the falling of a ship anchor according to claim 1, wherein at least two groups of hydraulic oil cylinder mounting holes with different positions are arranged on the bottom plate.

5. The centrifugal model test device for simulating the fall of a ship anchor of claim 2, wherein the rollers are made of rolling bearings.

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