Structure of quenching tank for ordinary clearance operation

　　The main structure of ordinary quenching tank is composed of tank body, medium inlet and discharge pipe and overflow tank. A medium stirring device, a medium cooling device or a medium cooling circulation system and a simple conveying machine are provided as required. The picture shows the quenching tank for ordinary clearance operation.

Figure Common Gap Quenching Tank

1 1 chute 2 1 discharge pipe 3 & mdash; quenching tank 4 1 accident discharge pipe 5 1 supply pipe

　　1. Trough shape and size

　　The shape of the tank body is rectangular, square and round. The volume of the tank (below the overflow tank) should be able to accommodate the required media, quenching parts and clamps. The height of the groove should leave space for the quenching parts to move up and down, and the bottom of the groove should leave a distance for depositing dirt. Hot oil is easily oxidized by air, so the surface of the groove should not be too large. However, there should be enough space between the quenching parts and the inner wall of the groove so that the workpiece can move during quenching. The quenching oil tank connected to the controlled atmosphere furnace shall be sealed.

　　2. Inlet pipe and overflow tank

　　for the quenching tank without stirring, the relative position of the liquid inlet pipe and the overflow tank defines the movement streamline of the medium in the tank. The liquid inlet pipe is generally arranged in the lower part of the tank, extending into the tank, about 100~200mm from the bottom of the tank, so as not to stir the iron filings and other dirt deposited at the bottom. The diameter of the liquid inlet pipe is designed according to the flow rate. Generally, v = 0.5~1.0 m/s is used for water and v = 1.0~2.0 m/s is used for oil.

　　The overflow tank is set at the edge of the upper opening of the box body, so that the heat medium floating from the tank can overflow and also serve as the outlet of the heat medium. The overflow tank is preferably formed in a ring shape so that the heat medium can uniformly float up throughout the tank. The volume of the overflow tank should be able to accommodate the volume of a batch of quenching parts and fixtures. The heat medium discharged from the overflow tank can be discharged by its own weight, or pumped out by a pump, and then filled from the lower part of the tank. When relying on self-weight discharge, the pipe diameter is designed according to the flow rate of 0.2~0.3 m/s.

　　The distance between the medium liquid level and the notch is usually 0.1~0.4m.