● 适用范围:本规程适用各类型气液联动阀
1 操作前检查
1.1 驱动装置进气阀处于全开状态,观察气压表压力值,应达到规定要求。
1.2 检查气路和油路管道及接头处有无泄漏。
1.3 液压定向控制阀选择开或关后,用手泵检查执行机构的工作情况,阀门开关运行应平稳、无卡阻现象。
2 气动操作
2.1 液压定向控制阀选择在自动(气动)位置,按下或拉出开关手柄,即实现阀门开或关。
2.2 阀门开关到位后,放松手柄,气压罐中气体将自动排放。
2.3 调节可调式减压阀开度大小,可决定阀门开关速度。
3 压降速率超限保护
3.1 调节膜片式导阀,使压降速率达到规定值.
3.2 调节延时罐进气阀,使延时时间达到所需要值。
3.3 液压定向控制阀选择在自动(气动)位置。
3.4 当管线发生爆管时,压降速率在延时时间内连续超过所设定值,经控制系统调节,气液压罐进气,使阀门关闭。
4 手动操作及气液装置
4.1 手动操作,当气源压力低于开阀所需压力值时,开(关)液压定向控制阀,而后摇动手泵即实现阀门开大。
4.2 活塞拨叉式气液装置可做阀门开度调节;旋转叶片式气液装置只可做阀门全开、全关运动,适用于切断阀。
5 气液联动阀的维护
5.1 气液联动阀的阀门维护参考《手动阀门操作规程》。
5.2气动和液动装置维护
序号 |
维护周期 |
维护内容 |
维护标准 |
备注 |
1 |
每个月 |
清洁 |
无灰尘和污渍 |
|
防腐 |
防腐层的完好 |
| ||
检查电气控制回路 |
无断路或接触不良 |
| ||
检查管路 |
无漏水、漏气 |
| ||
2 |
每半年 |
.检查限位开关、力矩限制开关 |
控制正常 |
|
检查驱动气源气质、液压油质,加注密封脂 |
源气质、液压油质符合规范 |
|
6 气液联动阀常见故障及原因
序号 |
故障 |
原因 |
1 |
驱动器不能驱动阀门 |
1.气源压力不足 |
2 |
气动操作缓慢迟滞 |
1.截止、节流止回阀开度调得过小 |
3 |
压降速率超限、防护误动作 |
1.压降速率、延时时间调整不当 |
4 |
压降速率超限、防护不动作 |
1.压降速率、延时时间调整不当 |
5 |
手泵扳不动 |
1.液压定向控制阀选择不正确 |
记录表格:《设备档案》除日常维护外,其他的定期维护维都要登记。
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