Cooling process and system for liquid quenching medium

A technology of quenching medium and liquid cooling medium, applied in the field of heat treatment, can solve the problems of waste of water resources, no recycling, and the water cooling capacity cannot meet the requirements of workpiece quenching efficiency, so as to improve quenching efficiency, reduce energy consumption, and reduce volume. Effect

Pending Publication Date: 2020-11-17
SHANGHAI FULUDI FLUID TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the external quenching liquid cooling method has the following obvious defects: it is difficult to meet the requirements of uniformity of quenching oil cooling, and it is difficult to achieve the requirements of rapid cooling of quenching oil
[0005] In addition, at present, most of the quenching tanks in machining heat treatment are cooled by cooling water jackets or cooling pipes, which are only suitable for small quenching tanks. The cooling water used must be continuously flowing tap water to achieve the purpose of cooling, and there is no recycling. Inevitable waste of water resources; and the cooling capacity of water cannot meet the requirements of workpiece quenching efficiency

Method used

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  • Cooling process and system for liquid quenching medium
  • Cooling process and system for liquid quenching medium

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Embodiment 1

[0044] see figure 1 As shown, the present embodiment provides a cooling process for a liquid quenching medium, which is mainly used in heat treatment equipment. In this heat treatment equipment, the workpiece 17 after the heat treatment in the vacuum furnace 14 is transferred to the feeding platform 15 by a manipulator, and then placed on the lifting cylinder The effect of 16 is reduced by immersing in the quenching tank 2 for quenching and cooling. During the continuous quenching process of the workpiece 17, the temperature of the liquid quenching medium in the quenching tank 2 increases, resulting in a decrease in the quenching quality and efficiency of the workpiece 17. Therefore, it is necessary to treat the high temperature The liquid quenching medium is cooled in real time to meet the quenching requirements of the workpiece 17 .

[0045] read on figure 1 As shown, this embodiment provides a liquid quenching medium cooling process, the main technical solution of which is...

Embodiment 2

[0049] see figure 2 As shown, this embodiment provides a method for recycling the gaseous cooling medium after heat exchange, which is used in the cooling process of the liquid quenching medium described in Example 1 to fully utilize the cooling capacity of liquid carbon dioxide or liquid nitrogen , to maximize the utilization of cooling capacity.

[0050] Such as figure 2 As shown, in this example, by CO 2 The liquid inlet is charged into the first storage tank 4 with liquid carbon dioxide in advance, and the filling amount accounts for at least 60% of the volume of the storage tank. High-pressure gas is used as the transmission power, and the high-pressure gas adopts 3.3MPa high-pressure air, and a certain pressure of high-pressure gas is passed into the first storage tank 4, and the liquid cooling medium in the first storage tank 4 is pressure-transmitted to the quenching furnace. Heater3. At the same time, the second storage tank 5 is used to receive the gaseous cool...

Embodiment 3

[0053] see figure 2 As shown, in order to strengthen the cooling and liquefaction speed of gaseous carbon dioxide in the storage tank, this embodiment provides a method for recycling the gaseous cooling medium after heat exchange, so as to make full use of the cooling capacity of liquid carbon dioxide or liquid nitrogen to realize cooling. Maximize capacity utilization.

[0054] Different from the above-mentioned embodiment 2, this embodiment uses high-pressure gas to send the liquid cooling medium in the first storage tank 4 through the second injection mechanism 8 and spray it into the second storage tank 5, and utilizes throttling to expand The principle is to reduce the temperature of the gaseous cooling medium received in the second storage tank 5 and convert it into a liquid cooling medium for recycling.

[0055] A first injection mechanism 7 is installed on the top of the first storage tank 4 , and a second injection mechanism 8 is installed on the top of the second s...

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Abstract

The invention discloses a cooling process and system for a liquid quenching medium. The cooling process comprises the steps that a quenching tank which needs to control the temperature of the liquid quenching medium is provided, and a heat exchanger is arranged in the liquid quenching medium; liquid carbon dioxide or liquid nitrogen is introduced into the heat exchanger to serve as a cooling medium; and heat exchange and cooling are carried out on the liquid quenching medium in the quenching tank by utilizing latent heat of vaporization of the liquid carbon dioxide or the liquid nitrogen. According to the cooling process and system for the liquid quenching medium, carbon dioxide and liquid nitrogen are used as the cooling medium, latent heat of vaporization of the low-temperature liquid carbon dioxide or low-temperature liquid nitrogen is fully utilized, and heat exchange and cooling are carried out on the high-temperature liquid quenching medium, so that the cooling strength is high,it is guaranteed that the liquid quenching medium is rapidly cooled; and in addition, re-liquefaction recycling of gaseous carbon dioxide and gaseous nitrogen is achieved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a cooling process of a liquid quenching medium and a system thereof. Background technique [0002] Quenching is an important heat treatment process in industrial production and a key technology to improve the physical properties of the workpiece. In the general process, the heated workpiece is placed in a special liquid quenching medium to rapidly cool the workpiece to improve certain physical properties including rigidity. , hardness, wear resistance, fatigue strength and toughness. During the quenching process, since the quenching liquid will absorb a large amount of heat from the workpiece, the temperature of the quenching liquid will rise sharply after quenching for a certain period of time, which will seriously affect the quenching effect. [0003] In order to solve the problem that the temperature of the quenching liquid will rise sharply, the traditional cooling me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/63F25D3/10
CPCC21D1/63F25D3/10Y02P10/20
Inventor 杨凡顾剑锋李卫平杨景峰
Owner SHANGHAI FULUDI FLUID TECH CO LTD
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