Drop hammer type shock test bench controlled by magnetic switch

A technology of magnetic switch and impact test, applied in the direction of strength characteristics, measuring devices, instruments, etc., can solve the problems such as the impact hammer cannot pass through and the boundary conditions are inconsistent, and achieve the effects of light weight, improved accuracy, and protection of safety.

Inactive Publication Date: 2010-06-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an impact test device that makes the impact test more accurate, has a wider application range, is light in weight, is easy to carry, can protect the safety of operators, and is easy to operate, and is especially suitable for different domestic construction sites. It not only solves the problem of inconsistent initial drop h

Method used

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  • Drop hammer type shock test bench controlled by magnetic switch
  • Drop hammer type shock test bench controlled by magnetic switch
  • Drop hammer type shock test bench controlled by magnetic switch

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Experimental program
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Embodiment Construction

[0015] The specific implementation steps of the present invention will be described in detail below in conjunction with the technical scheme and accompanying drawings.

[0016] Step 1. Fix the bottom plate 9 of the experimental device on the rigid foundation by anchoring expansion bolts.

[0017] Step 2. Adjust the positioning cantilever 3 to the desired height, and fix it on the impact frame 2.

[0018] Step 3. Precisely center the magnetic switch 1 and the impact ball 6, and fix them on the positioning cantilever 3.

[0019] Step 4. Place the test piece 7 on the oiled bottom plate 9 according to the test requirements, and place flexible gaskets between the test piece 7 and the four baffle plates 8 .

[0020] Step 5. Place the impact ball 6 in the center of the test piece, and install the protective device 5.

[0021] Step 6. Turn on the knob of the magnetic switch 1 to make it generate an adsorption force, and adsorb the impact hammer 4 to it.

[0022] Step 7. Turn off th...

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Abstract

The invention provides a drop hammer type shock test bench controlled by a magnetic switch, belongs to the technical field of civil engineering, and relates to a fiber concrete shock-resistance property test device. The device is characterized in that a shock rack is vertically welded to a bottom plate; a positioning cantilever is connected with the shock rack through a movable bolt, and the height is freely adjusted; the magnetic switch is connected with the positioning cantilever through a movable bolt, and the position is accurately adjusted. The free falling of the shock hammer is ensured, and the protecting device is clamped around four iron baffle plates on the bottom plate through square sleeves, thus the edge conditions of a test piece during shocking are same, and simultaneously the safety of the operators is ensured. The invention has the advantages of obvious enhancement of shock test accuracy, wide application, simple structure, easy operation, convenient carrying and enhancement of test safety.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to a fiber concrete impact resistance test device, in particular to a drop hammer type impact test bench controlled by a magnetic switch. Background technique [0002] Fiber-reinforced concrete can improve the mechanical properties and durability of concrete, and is widely used in building structures and tunnel engineering, and its development prospects are very promising. At present, the known test devices for the impact resistance of fiber concrete include the drop weight test device recommended by the ACI544 committee, and the drop weight test device in my country is similar to the one recommended by the ACI544 committee. When using this device for testing, it is necessary to manually lift the steel impact hammer to a specified height and align it with the specimen, and then relax the hands so that the impact hammer falls to impact the concrete specimen. Due to the manua...

Claims

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Application Information

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IPC IPC(8): G01N3/303
Inventor 丁一宁尤志国董帅陈相宇达布希拉图田贺王晓飞张发盛
Owner DALIAN UNIV OF TECH
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