JPH0272232U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the configuration of the present invention. 1...Fish tank, 2...Pump, 2a...Pump body,
3...Negative pressure generator, 4...Check valve (inlet valve), 5...Check valve (outlet valve), 6...Receiving tank, 7, 8...Valve, 9...Liquid level gauge, 10...Radiation counter, 11 ...first communication pipe,
12...Second communication pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A fish tank including fish bodies to be counted and a water body; A main body having a first communication pipe that cannot flow back toward the tank, and a second communication pipe that can flow out from the main body but cannot flow into the main body;
A fish counting device comprising: a pump consisting of a pump; and a counter using radiation provided in the second communication pipe. 2 The upper gas phase part of the fish tank containing the fish to be counted and the water body is connected to a negative pressure generator, and by increasing the degree of negative pressure, the water body including the fish to be counted passes through the first connecting pipe. is sucked into the main body of the pump in a non-reversible manner, and by reducing the degree of negative pressure, the water body including the fish to be counted in the main body flows out from the second communication pipe in an irreversible manner, and the second 2. The fish counting device according to claim 1, wherein the fish counting device is configured to perform counting using a radiation-based fish counting device provided at an appropriate position in the communication pipe.