Test method and device thereof for reciprocating tensile fatigue testing of safety break-away valves for oiling machines

A technology of fatigue test and test method, applied in the direction of measuring device, using stable tension/pressure test material strength, instruments, etc., can solve problems such as potential quality hazards, safety accidents, economic losses, etc.

Inactive Publication Date: 2011-02-16
ZHEJIANG CHUNHUI INTELLIGENT CONTROL
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] The safety pull-off valve for the fuel dispenser is installed on the fuel delivery pipe of the fuel dispenser. It is a safety connection device between the fuel gun and the fuel dispenser. It has a built-in check valve. Once the fuel gun is pulled by a certain external force, the safety pull-off valve will It will break automatically, and at the same time, it will automatically close and cut off the oil flow, so as to avoid the breakage of the fuel pipe of

Method used

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  • Test method and device thereof for reciprocating tensile fatigue testing of safety break-away valves for oiling machines
  • Test method and device thereof for reciprocating tensile fatigue testing of safety break-away valves for oiling machines
  • Test method and device thereof for reciprocating tensile fatigue testing of safety break-away valves for oiling machines

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Embodiment Construction

[0012] In the test method of the present invention, 3 safety breakaway valves of the same batch are randomly selected as test objects, A, B and C, placed in a test device, and connected in series with the moving components of the test device in an orderly manner. Form a control loop; set the pulling force required by the tested safety breaking valve as F, and the pulling force F should meet the condition of 0≤F≤A, and the pulling force borne by the tested safety breaking valve will be reduced by 3S-5S in time. F gradually increases from 0 Newton to A Newton, delays for 3S-5S, and then uses 3S-5S to gradually reduce the tension F on the tested safety breakaway valve from A Newton to 0 Newton, thus forming a reciprocating For the cycle of the tensile fatigue test, the number of synchronously displayed on the counter 1 is 1 time, and so on, when the repeated cycle reaches 10,000 times, and the tested safety breakaway valve does not break, then the batch of safety breakaway valves ...

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Abstract

The invention provides a test method for reciprocating tensile fatigue testing of safety break-away valves for oiling machines, which belongs to the technical field of assembly and testing of the safety break-away valves for the oiling machines. A two-way time relay is used for controlling the reciprocating motion of a piston rod of a cylinder with a valve, tensile force F born on the tested safety break-away valve can be gradually increased from 0N to the gravity of a heavy hammer via 3S-5S by utilizing the cushioning action of a spring, time is delayed for 3S-5S, and the tensile force F born on the tested safety break-away valve is gradually reduced from the gravity of the heavy hammer to 0N via 3S-5S, thereby constituting a reciprocating tensile fatigue test cycle, displaying 1 on a counter, and testing in such as way; when the repeated cycles reach 10000 and the tested safety break-away valves are not broken away, the batch of the safety break-away valves can be judged to be qualified; when the cycles are less than 10000 and any one of the tested safety break-away valves is broken away, the batch of the safety break-away valves can be judged to be unqualified. The test method has novel design and high working efficiency, and can find the quality hidden troubles of products in time and avoid the economic loss and the safety accidents.

Description

technical field [0001] The invention relates to a test method and a device for a reciprocating tensile fatigue test of a safety break valve for a fuel dispenser, and belongs to the technical field of assembly testing of a safety break valve for a fuel dispenser. Background technique [0002] The safety pull-off valve for the fuel dispenser is installed on the fuel delivery pipe of the fuel dispenser. It is a safety connection device between the fuel gun and the fuel dispenser. It has a built-in check valve. Once the fuel gun is pulled by a certain external force, the safety pull-off valve will It will break automatically, and at the same time automatically close and cut off the oil flow, so as to avoid the breakage of the fuel pipe of the fuel dispenser or the fuel dispenser being pulled down, so as to avoid dangerous accidents; at present, the fatigue test of the safety pull-off valve is generally installed directly on the fuel pipe of the fuel dispenser. In this way, not o...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/02
Inventor 李登奎干加祥曹立中徐岳锋邬铭铭胡玲丽黄雅琴俞江
Owner ZHEJIANG CHUNHUI INTELLIGENT CONTROL
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