Freeze-fracturing hook for heavy weight falling impact test device and use method of freeze-fracturing hook

Abstract

The invention discloses a freeze-fracturing hook for a heavy weight falling impact test device and a use method of the freeze-fracturing hook. The freeze-fracturing hook comprises a first semi-ring body, a second semi-ring body, cold brittle fracture sections and a cooling medium injection system, wherein the middle position of the outer wall of the first semi-ring body is connected with a rigid suspender; the two ends of the first semi-ring body are connected with the two ends of the second semi-ring body through the cold brittle fracture sections respectively; and the cooling medium injection system comprises cooling spray heads, a cooling medium pipeline and a cooling medium flow control valve, the cooling spray heads are arranged at positions wherein the cold brittle fracture sections are located, the output ends of the spray heads face the cold brittle fracture sections, one end of the cooling medium pipeline is connected with the input ends of the cooling spray heads, the other end of the cooling medium pipeline is used for being connected with a cooling medium source, and the cooling medium flow control valve is arranged on the cooling medium pipeline. According to the invention, when a heavy weight needs to fall down, connection with the heavy weight can be effectively and accurately loosened for testing.

Description

technical field [0001] The invention belongs to the technical field of heavy hammer drop weight impact test, and in particular relates to a freeze-off hook for a heavy hammer drop weight impact test device and a use method thereof. Background technique [0002] The heavy hammer impact test is an important test for the study of building reinforcement. Today's hooks are completed by the first hook, the second hook and the latch. The first hook is composed of two special steel plates with a thickness of 14mm. Ten high-strength bolts of 8.8S are connected at intervals of 14mm; under the first hook, a high-strength bolt with a diameter of 10mm is used to connect the second hook, and the second hook is composed of two 12mm special steel plates. In order to control the fall of the heavy hammer at a high place, a clamp is added. The clamp is made of two 10mm thick special steel plates connected by 8.8S high-strength bolts, and a steel wire connected to the hand hoist Connect the up...

AI Technical Summary

Problems solved by technology

[0003] But the existing hook has the following defects: since the second hook and the weight are connected by a wire rope, it will inevitably cause the weight to swing, Moreover, there is no guarantee that the heavy hammer will fall vertically during the falling process; because the decoupling method of the hook is controlled by the latch, when the weight of the heavy hammer is too large, artificially pulling the hand hoist cannot release it in time, so It will greatly affect the accuracy of the experiment; since it is impossible to ensure whether the heavy hammer can be artificially dropped, and it is impossible to ensure that the impact time of its fall can be accurately recorded, it is impossible to further adjust the accuracy of the experiment

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