我队拥有BW-250型泥浆泵（衡阳探矿厂制造）8台，从1984年使用至今。我们在使用中发现安全阀由于其结构上存在某些局限性，因而给使用和维护带来不便。突出的问题是：1．安全阀的阀和阀体都是易损件，如若被冲蚀，必须全部更换；2．调整不便，动作不灵活。由于阀与阀体间隙很少，很容易被泥浆滞住，甚至失去作用。又因备件不足或更换不 Our team owns 8 BW-250 mud pumps (manufactured by Hengyang Prospecting Plant), which have been used since 1984. In use, we found that the safety valve has inconvenience to use and maintenance due to its structural limitations. The outstanding issues are: 1. Valves and valve body of safety valve are all wearing parts. If they are washed out, they must be replaced; 2. Inconvenient adjustments and inflexible movements. Because the gap between the valve and the valve body is very small, it is very easy to get stuck in the mud and even lose its effect. Because of lack of spare parts or replacement