1. 加药泵的结构：该泵的由电机、传动箱、缸体等三部份组成。加药泵传动箱部件是由弓型连杆凸轮机构、行程调节机构和速比蜗轮机构组成；通过旋转调节手轮来实行高调节行程，从面改变弓型连杆中前后距离来达到改变柱塞行程的目的。 缸体部件是由泵头、吸入阀组、排出阀组、柱塞和填料密封件组成。
2. 加药泵工作原理：电机经联轴器带动蜗杆并通过蜗轮减速使主轴和偏心轮作回转运动，由偏心轮带动弓型连杆的滑动调节座内作往复运动。当柱塞向后死点移时，泵腔内逐渐形成真空，吸入阀打开，吸入液体；当柱塞向前死点移动时，此时吸入阀关闭，排出阀打开，液体在柱塞向进一步运动时排出。在加药泵的往复顺还工作形成连续有压力、定量的排放液体(图\文www.wxjpby.com/)。
中译英：
1 of the dosing pump structure : the pump consists of a motor, gear box, cylinder and other three parts. Dosing pump gear box parts by arch type cam and connecting rod mechanism, a travel adjusting mechanism and the ratio of worm gear mechanism; through the rotation of the adjusting hand wheel to execute high stroke adjustment, from the surface to change the bow rod front distance to achieve the purpose of changing the plunger stroke. Parts of the cylinder is composed of a pump head, suction valve, discharge valve group group, the plunger and the packing seal components.
2 dosing pump working principle: motor drive the worm and the worm gear coupling shaft and the eccentric rotation of rotary movement, composed of an eccentric wheel arch type connecting rod slide adjustment block for reciprocating motion. When the plunger moves backward dead point, the pump cavity is formed gradually vacuum, suction valve is opened, the inhalation of the liquid; when the plunger moves forward dead, when the suction valve is closed, the discharge valve is opened, the liquid in the piston to further movement of discharge. The dosing pump reciprocating along the working pressure, forming a continuous quantitative discharging liquid.