Bending moment loading device for valve end connection fire resistance test and using method
A technology of fire resistance test and end connection, which is applied in the direction of mechanical valve test, application of stable tension/pressure to test material strength, etc. It can solve problems such as economic loss, seal failure, joint stiffness reduction, etc., and achieve the effect of saving test time
Active Publication Date: 2022-04-08
HEFEI GENERAL MACHINERY RES INST +1
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Problems solved by technology
[0002] When the valve end connection in the petroleum and petrochemical industry is exposed to the surrounding flame environment, the heat transfer rate between the outside of the first flange and the bolt is faster than that between the seal and the inside of the first flange, resulting in a temperature gradient at the connection point, which will cause the seal to be pre-tightened The loss of force and the contact pressure required to maintain the seal are lost. At the same time, because the strength of the gasket is not enough to withstand the pressure load or the temperature exceeds the limit, it will lead to a decrease in the stiffness of the joint, resulting in seal failure, resulting in economic losses and environmental damage. and major safety incidents
Method used
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Embodiment 2
[0059] The method of using the valve end in embodiment 1 to connect the fire resistance test with the bending moment loading device, the specific steps are as follows:
[0060] S1, open the hydraulic pump start button on the console of the remote control mechanism 6, the hydraulic system in the power mechanism starts to work, and the hydraulic station start indicator light in the power mechanism is on simultaneously;
[0061] S2. Press the extension button of the oil cylinder corresponding to the first jacking part 31, and clamp the valve 7 to be tested;
[0062] S3. Press the extension button of the oil cylinder corresponding to the moving second jacking part 41, and the trolley moves to transport the valve 7 to be tested to the station to be tested;
[0063] S4. After the detection is completed, press the oil cylinder retraction button corresponding to the second lifting part 41 to move the valve 7 to be tested to the detection position;
[0064] S5. After being hoisted in ...
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The valve end is connected with a bending moment loading device for fire resistance test and its use method. The device includes a mobile push mechanism, and also includes a valve clamping mechanism and a power mechanism arranged on the mobile push mechanism. The valve clamping mechanism includes a movable push mechanism. The left bending moment loading arm and the right bending moment loading arm, the opposite ends of the left bending moment loading arm and the right bending moment loading arm are respectively provided with a first flange for fixing the valve to be tested, and the other end is provided with an adjustment The pressure measurement assembly is lifted at the angle between the left bending moment loading arm and the right bending moment loading arm, and the power mechanism drives the valve to be tested on the moving push mechanism to move back and forth inside and outside the furnace body. This application drives the valve clamping mechanism to move back and forth through the power mechanism, so that the measured valve enters and exits the furnace body. The measured valve on the first flange can be subjected to both tension and pressure under the action of the jacking pressure measurement component. , so that a bending moment is applied to the valve end connection.
Description
technical field [0001] The invention belongs to the technical field of valve end connection fire resistance test, and in particular relates to a bending moment loading device for the valve end connection fire resistance test and a using method. Background technique [0002] When the valve end connection in the petroleum and petrochemical industry is exposed to the surrounding flame environment, the heat transfer rate between the outside of the first flange and the bolt is faster than that between the seal and the inside of the first flange, resulting in a temperature gradient at the connection point, which will cause the seal to be pre-tightened The loss of force and the contact pressure required to maintain the seal are lost. At the same time, because the strength of the gasket is not enough to withstand the pressure load or the temperature exceeds the limit, it will lead to a decrease in the stiffness of the joint, resulting in seal failure, resulting in economic losses and...
Claims
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IPC IPC(8): G01M13/003G01N3/18
CPCG01M13/003G01N3/18
Inventor 王剑张继伟范宜霖黄健彭林雷艳李忠
Owner HEFEI GENERAL MACHINERY RES INST