According to the principle of moment balance steam-water
spring design.
Within the prescribed scope of load displacement, load torque and spring torque is always in balance.
Therefore, supported by constant crane pipeline and equipment displacement occurs, can get constant supporting force, will not bring additional stress to piping and equipment.
the relief valve position determination of steam-water pipes of the spring: relief valve nozzle under external load caused by the bending moment requires small as far as possible, so as not to affect the performance of the valve body deformation.
In addition to consider when setting stent pipeline under the gravity load, also should pay attention to when the discharge fluid reaction force and its direction.
Safety valve outlet pipe bracket of a root point should not take root in the flexible large steel structure, at the same time supporting points of vertical thermal displacement should be small as far as possible.
On the higher temperature of pipe, valve export levels should be long enough, avoid stents escapes.
Relief valve suddenly open, prone to vibration, especially large diameter, large differential pressure relief valve should be paid attention to vibration control, the outlet pipe of gas-liquid two phase, more attention should be paid to vibration control and avoid water hammer.
the purpose and scope of application:
this standard applies to the displacement range for VS (
0～180mm)
TD (
0 ~ 120毫米)
, load range is 154 ~ 217384 n, using temperature range -
Steam-water variable spring of 20 ℃ ~ 200 ℃.
boiler steaming-water pipe or in steam-water spring is mainly used for power equipment, the thermal displacement and its equipment in the operation of the device.
Calculated and determined according to the pipeline stress situation of the work and the thermal displacement steam-water spring requirements, our factory will be carried out in accordance with the design load setting steam-water spring: spring preloading and set by the cold load position;
At the same time, the theoretical working position to be in the cold.
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