Independent water storage tank for comprehensive dental treatment table

The utility model provides an independent water storage tank for a comprehensive dental treatment table. The independent water storage tank comprises a tank body and a detachable quantitative liquid extracting assembly. The quantitative liquid extracting assembly comprises an outer cover, a liquid extracting pump, an electric pushing rod and a quantitative liquid containing tank. The liquid extracting pump, the electric pushing rod and the quantitative liquid containing tank are arranged inside the outer cover. The outer cover is made of cylindrical plastics. An upper threaded opening connected with the treatment table is formed in the top of the outer cover. A lower threaded opening connected with the tank body is formed in the bottom of the outer cover. The liquid extracting pump comprises a liquid extracting tank. The liquid extracting tank is internally and sequentially provided with a lower valve, a piston, an upper valve, a push-pull rod and a connecting rod from bottom to top. According to the independent water storage tank for the comprehensive dental treatment table, on the premise of the low cost, liquid inside the tank can be quantitatively extracted conveniently and rapidly; by the adoption of the detachable design, assembly and disassembly are convenient, and normal liquid extracting is not affected even when the quantitative extracting function is not enabled during disassembling.