Barb claw strength testing device

Abstract

The utility model discloses a barb clamping jaw strength testing device which comprises a base, a fixing seat is arranged on the base, a simulation mounting groove is formed in the fixing seat, a barb clamping jaw is arranged in the simulation mounting groove through a mounting bolt, and the groove bottom face of the simulation mounting groove is used for limiting the extending posture of the barb clamping jaw. An oil cylinder is further arranged in the stress direction of the barb clamping jaw, the telescopic end of the oil cylinder is connected with a rod joint bearing through a force sensor, the rod joint bearing is connected with a convex jaw through a rotating shaft, the convex jaw is arranged at the extending end of the barb clamping jaw in a sleeving mode and exerts acting force, and the oil cylinder is arranged on the base. According to the utility model, the maximum failure load bearing capability of the barb jack catch and the anti-shearing capability of the fixed bolt can be tested.

Description

Technical Field

[0001] The utility model relates to the technical field of marine engineering, in particular to a barbed claw strength testing device. Background Art

[0002] The entire installation process of the collision locking device is carried out on the seabed. A breaking traction device is provided at the front end of the collision locking device. The breaking traction device is pulled by the main steel wire rope so that the collision locking device moves with it and enters the submarine cable opening at the bottom of the monopile foundation. When the collision locking device is pulled into place, the breaking bolts on the breaking traction device break according to the required breaking tension, and then the breaking traction device continues to move with the main steel wire to completely detach from the collision locking device. When the collision locking device is installed in place, its circumferentially distributed barbed claws extend to prevent the collision locking device from sliding backward, and an interference flange is provided at the rear of the collision locking device. The outer diameter of the interference flange is larger than the diameter of the submarine cable opening at the bottom of the monopile foundation, thereby fixing the collision locking device.

[0003] When the breaking bolt on the breaking traction device breaks according to the required breaking force, the collision locking device will slide downward under the action of gravity, which will produce an impact force on the barbed claw; and after the collision locking device is installed in place, a bending limiter equipment is suspended at its tail and swings freely with the flow of sea water, which will produce a pulling force on the barbed claw.

[0004] When the barbed claw is not strong enough, the pulling force will damage the barbed claw, and the fixing bolt used to connect the barbed claw will also be subjected to shear force. Therefore, it is urgent to provide a device that can detect the strength of the barbed claw. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a barbed claw strength testing device, which can test the maximum bearing capacity of the barbed claw for a damaging load and the shear resistance capacity of its fixing bolt.

[0006] In order to solve the above technical problems, the utility model provides a barbed claw strength testing device, including a base, a fixed base is arranged on the base, a simulated mounting groove is arranged on the fixed base, the barbed claw is arranged in the simulated mounting groove by a mounting bolt, the bottom surface of the simulated mounting groove is used to limit the extended posture of the barbed claw, and an oil cylinder is also arranged in the force direction of the barbed claw, the telescopic end of the oil cylinder is connected to the rod joint bearing through a force sensor, the rod joint bearing is connected to the convex claw through a rotating shaft, the convex claw is sleeved on the extended end of the barbed claw and applies a force, and the oil cylinder is arranged on the base.

[0007] Furthermore, the oil cylinder applies a force to the barbed claw by pulling the convex claw.

[0008] Furthermore, the oil cylinder is of an intermediate swinging structure, and the two intermediate shafts of the oil cylinder are connected to the base through a rotating seat.

[0009] Furthermore, the rotating seat includes a support frame and an outer spherical bearing, the outer spherical bearing is connected to the intermediate shaft of the oil cylinder, the outer spherical bearing is locked on the support frame, and the support frame is provided with an avoidance portion.

[0010] Furthermore, locking nuts are provided between the force sensor and the oil cylinder and between the force sensor and the rod joint bearing.

[0011] Furthermore, the base is welded from channel steel, and ribs for reinforcing the strength of the connection position are arranged inside the channel steel.

[0012] Furthermore, the surface of the fixing seat is arc-shaped, and a vertical locking hole and a horizontal locking hole penetrating the simulated installation slot are provided on the fixing seat.

[0013] Furthermore, the convex claw is a U-shaped structure.

[0014] Beneficial effects of the utility model:

[0015] 1. The simulated force is applied to the barbed claws through the oil cylinder and the convex claws, and the magnitude of the applied force is determined by the force sensor. It is accurate and reliable, and can be tested under different force conditions and in the case of destructive fracture.

[0016] 2. The whole device has multiple degrees of freedom, and has low requirements for the flatness of the base. The convex claw can automatically adjust its position when force is applied. Since the barbed claw may be deformed or displaced after being subjected to force, multiple degrees of freedom can ensure that the contact position with the barbed claw remains unchanged, thereby improving the reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the force applying mechanism of the utility model;

[0019] Figure 3 It is a partial structural schematic diagram of the fixing seat of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the base part of the utility model. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0022] Reference Figures 1 to 4 As shown, an embodiment of the barbed claw strength testing device of the utility model comprises a base 1, a fixing base 2 is arranged on the base, a simulated mounting groove 3 is arranged on the fixing base, a barbed claw 4 is arranged in the simulated mounting groove by a mounting bolt 5, and the bottom surface of the simulated mounting groove is used to limit the extended posture of the barbed claw, and a cylinder 6 is also arranged in the force direction of the barbed claw, and the telescopic end of the cylinder is connected to the rod joint bearing 8 through a force sensor 7, and the rod joint bearing is connected to the convex claw 9 through a rotating shaft, and the convex claw is sleeved on the extended end of the barbed claw and applies a force, and the cylinder is arranged on the base.

[0023] When applying force, the oil cylinder can be extended or retracted. When extended, the convex claw pushes the barbed claw to apply force, and the force sensor is a pressure sensor at this time. When retracted, the convex claw pulls the barbed claw to apply force, and the force sensor is a tension sensor at this time. In this embodiment, the oil cylinder preferably applies force to the barbed claw by pulling the convex claw. The oil cylinder moves, drives the convex claw to move and applies force to the barbed claw. The force sensor collects force data in real time. According to the test requirements, the barbed claw is kept at a constant force or continuously applied until a catalytic fracture occurs. During this period, the barbed claw and the mounting bolts used to fix the barbed claw are observed and test data are obtained. The rod joint bearing can maintain the stability of the force.

[0024] In order to ensure the consistency of the force direction and position, the oil cylinder adopts an intermediate swing structure, and the two intermediate shafts 10 of the oil cylinder are connected to the base through the rotating seat 11, so that the whole force application has multiple degrees of freedom, which can effectively reduce the flatness requirements of the base, and when the force is applied, the convex claw can automatically adjust the position to ensure that the contact position with the barbed claw remains unchanged, the force is stable and reliable, and no interference occurs, which improves the reliability of the test. In addition, in the swing-type overall force application structure, the overall component structure is simple and easy to manufacture, and all components are matched through hole pins and threads, which are easy to replace after damage.

[0025] The above-mentioned rotating seat includes a support frame 12 and an outer spherical bearing 13. The outer spherical bearing is connected to the intermediate shaft of the oil cylinder. The outer spherical bearing is locked on the support frame. The support frame is provided with an avoidance portion. The structure is simple and easy to obtain and prepare. A locking nut 14 is provided between the force sensor and the oil cylinder and between the force sensor and the rod joint bearing to ensure the stability of the connection.

[0026] The base is welded by channel steel 15, and ribs 18 are arranged inside the channel steel to strengthen the strength of the connection position. The overall structural strength is high and the cost is low. The surface of the fixed seat is arc-shaped, and a vertical lock hole 16 and a horizontal lock hole 17 that penetrates the simulated installation slot are arranged on the fixed seat to facilitate installation and simulate the on-site installation environment of the barbed claw, so that the authenticity of the test is guaranteed. The convex claw is a U-shaped structure, which is easy to install and set.

[0027] Based on the above structure, when preparing the device, first install the outer spherical bearing on the rotating shafts on both sides of the middle swinging cylinder, and then install the outer spherical bearing on the support frame on the side of the cylinder, and then place the whole on the corresponding hole position of the base and fix it with bolts; then screw one end of the tension sensor into the head of the cylinder rod, and then screw the rod joint bearing into the other end of the tension sensor, and lock it with a locking nut; align the hole position of the convex claw with the hole position of the rod joint bearing, insert the rotating shaft and lock it; finally, place the fixed base on the corresponding hole position of the base, fix it with bolts, and the preparation of the device is completed.

[0028] Then the test can be carried out. Align the tail fixing hole of the barbed claw to be tested with the horizontal lock hole of the barbed claw fixing seat, insert the fixing bolt to be tested, and fix one end with the corresponding nut; the oil cylinder extends, and the convex claw sleeve is set to clamp the barbed claw. The oil cylinder retracts, applying a pulling force to the barbed claw, and at the same time, a shearing force can be applied to the fixing bolt;

[0029] Test according to test needs:

[0030] Test condition 1: The oil cylinder continues to apply force until the barbed claw or the fixing bolt breaks catastrophically, and the value of the tension sensor is read, that is, the maximum ability of the barbed claw to withstand the breaking load and the shear resistance of the fixing bolt are tested;

[0031] Test condition 2: The cylinder applies force in stages and observes the status of the barbed claw and the fixing bolt under different loads. This can test the ability of the barbed claw to safely break the load and the ability of the fixing bolt to safely resist shear.

[0032] The above embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in this technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A barbed claw strength testing device, characterized in that: It includes a base, a fixing seat is arranged on the base, a simulation installation groove is arranged on the fixing seat, a barbed claw is arranged in the simulation installation groove by a mounting bolt, the bottom surface of the simulation installation groove is used to limit the extension posture of the barbed claw, and an oil cylinder is also arranged in the force direction of the barbed claw, the telescopic end of the oil cylinder is connected with the rod joint bearing through a force sensor, the rod joint bearing is connected with the convex claw through a rotating shaft, the convex claw is sleeved on the protruding end of the barbed claw and applies a force, and the oil cylinder is arranged on the base.

2. The barb claw strength testing device according to claim 1, characterized in that: The oil cylinder applies a force to the barbed claw by pulling the convex claw.

3. The barb claw strength testing device according to claim 1, characterized in that: The oil cylinder is of a middle swinging structure, and the two middle shafts of the oil cylinder are connected to the base through a rotating seat.

4. The barb claw strength testing device according to claim 3, characterized in that: The rotating seat comprises a support frame and an outer spherical bearing, the outer spherical bearing is connected to the middle shaft of the oil cylinder, the outer spherical bearing is locked on the support frame, and an avoidance portion is arranged on the support frame.

5. The barb claw strength testing device according to claim 1, characterized in that: Locking nuts are arranged between the force sensor and the oil cylinder and between the force sensor and the rod joint bearing.

6. The barb claw strength testing device according to claim 1, characterized in that: The base is welded by channel steel, and ribs for reinforcing the strength of the connection position are arranged inside the channel steel.

7. The barb claw strength testing device according to claim 1, characterized in that: The surface of the fixing seat is arc-shaped, and a vertical locking hole and a horizontal locking hole penetrating the simulated installation slot are arranged on the fixing seat.

8. The barb claw strength testing device according to claim 1, characterized in that: The convex claw is a U-shaped structure.

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