论文部分内容阅读
目的分析某石油采油管修试厂生产过程中噪声产生原因和控制措施及其控制效果,提出有针对性的防噪声措施。方法职业卫生现场调查、工作场所噪声强度测量、噪声作业分级、噪声作业人员纯音听力测试。结果采取控制油管输送、移动堆放过程中产生的机械性噪声措施后,工作场所噪声强度降低了2~9 d B(A);通径岗位、维修岗位接触噪声8 h等效A声级由85~89 d B(作业分级Ⅰ级,轻度危害)降低为<85 d B(符合国家职业接触限值);试压拧扣岗位由95 d B(作业分级Ⅲ级,重度危害)降低到88 d B(作业分级Ⅰ级,轻度危害)。纯音听力测试发现试压拧扣岗位1人语频听阈提高。结论采油管修试过程中产生较高的噪声,会对劳动者健康产生不良影响。控制油管输送、移动堆放过程中产生的机械性噪声措施,是控制采油管修试过程中噪声危害的关键措施。
Objective To analyze the causes of noise and control measures and their control effects during the production of a petroleum recovery pipe trial plant and put forward targeted anti-noise measures. Methods Occupational Health Surveys, workplace noise intensity measurement, noise operation classification, noise operators pure tone hearing test. Results The noise intensity in the workplace was reduced by 2 ~ 9 d B (A) after controlling for the tubing transportation and mechanical noise during the stacking process. ~ 89 d B (Class I, mild hazard) was reduced to <85 d B (in line with national occupational exposure limits); the pressure relief tightening position was reduced from 95 d B (Class III operation, severe hazard) to 88 d B (job classification grade, mild hazard). Pure tone hearing test found that the pressure test screw position 1 hearing threshold increased. Conclusion The high noise generated during the pipeline repair process will have an adverse impact on the health of workers. Controlling the delivery of the tubing and moving the mechanical noise generated during the stacking process are the key measures to control the noise hazard during the recovery test of the production tubing.