EXPERIMENTAL ENCLOSED ECOSYSTEM HAVING DRAIN PIPELINE STRUCTURE WHICH CAN CONTROL THE FLOW RATE CORRESPONDING TO THE DEPTH OF WATER

An enclosed ecosystem experiment device (1) according to the present invention includes an ecological water tank (30), a plurality of introduction pipes (40), a plurality of discharge pipes (50), flow rate adjusting units (41, 51), a distribution tank (20), a collection discharge pipe (80), a branch pipe (87), a water bottle (85), a collection discharge valve (82) and a branch pipe valve (81). The ecological water tank (30) has multiple layered inlets (31) on one sidewall so that the inlets (31) are used at various heights, and multiple layered outlets (32) on another sidewall so that the outlets (32) are used at various heights. The introduction pipes (40) are mounted corresponding to the inlets (31). The discharge pipes (50) are mounted corresponding to the outlets (32). The flow rate adjusting units (41, 51) are mounted in the introduction pipe (40) and the discharge pipe (50), respectively. The distribution tank (20) is installed to supply water to the ecological water tank (30) through the introduction pipes (40). The collection discharge pipe (80) is linked with the discharge pipes (50) so that water discharged from the layers of the ecological water tank (30) through the discharge pipes (50) is collected and discharged out. The branch pipe (87) is installed to be branched from the collection discharge pipe (80). The water bottle (85) receives water discharged through the branch pipe (87). The collection discharge valve (82) is installed behind the branch position of the branch pipe (87) on the collection discharge pipe (80). The branch pipe valve (81) is installed on the branch pipe (87). According to the present invention, various flow rates are used according to depths of water. Accordingly, ecological researches are performed under a condition similar to a real ecological environment of water flowing, for example, in rivers, streams, or sea, so that the ecological environment under water can be investigated and studied with significant accuracy and reliability. 본 발명에 따른 폐쇄생태계 실험장치(1)는, 높이를 달리하도록 한쪽 측벽에 복수개의 층으로 유입구(31)가 형성되고 높이를 달리하도록 다른 한쪽 측벽에 복수개의 층으로 유출구(32)가 형성되는 생태수조(30); 유입구(31)에 대응하도록 설치되는 복수개의 유입관(40); 유출구(32)에 대응하도록 설치되는 복수개의 유출관(50); 유입관(40)과 유출관(50) 각각에 설치되는 유량조절수단(41, 51); 유입관(40)을 통하여 생태수조(30)에 물을 공급하도록 설치되는 분배조(20); 유출관(50)을 통하여 생태수조(30)에서 층별로 유출되는 물이 하나로 취합되어 외부 배출되도록 복수개의 유출관(50)에 연결 설치되는 취합유출관(80); 취합유출관(80)에서 분기되도록 설치되는 분기관(87); 분기관(87)을 통해서 배출되는 물을 받도록 설치되는 수통(85); 분기관(87)이 분기된 부위보다 뒤쪽에 위치하도록 취합유출관(80)에 설치되는 취합배출 개폐밸브(82); 및 분기